Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment comprising the same. The optical lens sequentially comprises a first lens with positive focal power from a first side to a second side along an optical axis, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with positive focal power, the first side surface of the second lens is a concave surface; the third lens has negative focal power, and the first side surface of the third lens is a concave surface; the fourth lens has positive focal power, and the first side surface of the fourth lens is a convex surface; the fifth lens has positive focal power, and the first side surface of the fifth lens is a convex surface; the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface; the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface; and the eighth lens has positive focal power or negative focal power, the first side surface of the eighth lens is a convex surface, and the second side surface of the eighth lens is a concave surface. The optical lens has at least one beneficial effect of miniaturization, high resolution, large aperture, high light flux and the like.

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] The laser radar lens is a key component for an automatic driving auxiliary system to obtain external information. In recent years, with the rapid development of the automatic driving auxiliary system, the demand for the laser radar lens is also increasing, and the laser radar lens is developing towards high resolution and miniaturization.

[0003] Compared with ordinary optical lenses, the laser radar lens in the automatic driving auxiliary system has more special requirements, which not only meets the requirements of safe driving, but also adapts to special installation positions. At present, the laser radar lens in the prior art mainly has the following problems: 1) the light transmission capability is not strong, which limits the detection distance of the laser radar; 2) it cannot simultaneously meet the requirements of small front aperture and miniaturization; 3) the resolution cannot meet the use requirements. Therefore, the market currently needs an optical lens with a large aperture, high resolution and miniaturization. SUMMARY

[0004] The first aspect of the present application provides an optical lens, which comprises, in order from a first side to a second side along an optical axis: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, a seventh lens with positive refractive power or negative refractive power, and an eighth lens with positive refractive power or negative refractive power. The first side of the first lens is a convex surface, and the second side is a concave surface; the first side of the second lens is a concave surface, and the second side is a convex surface or a concave surface; the first side of the third lens is a concave surface, and the second side is a convex surface or a concave surface; the first side of the fourth lens is a convex surface, and the second side is a convex surface or a concave surface; the first side of the fifth lens is a convex surface, and the second side is a convex surface or a concave surface; the first side of the sixth lens is a convex surface, and the second side is a concave surface; the first side of the seventh lens is a convex surface, and the second side is a concave surface; the first side of the eighth lens is a convex surface, and the second side is a concave surface.

[0005] In one embodiment, the optical lens satisfies: TTL / H / FOV≤0.3, where TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, H is the image height corresponding to the maximum field of view angle of the optical lens, and FOV is the maximum field of view angle of the optical lens.

[0006] In one embodiment, the optical lens satisfies: D / H / FOV≤0.15, where D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

[0007] In one embodiment, the optical lens satisfies: (F×θ) / D≤0.5, where F is the effective focal length of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens.

[0008] In one embodiment, the optical lens satisfies: BFL / TTL≤0.15, where BFL is the distance on the optical axis from the center of the second side of the eighth lens to the imaging plane of the optical lens, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens.

[0009] In one embodiment, the optical lens satisfies: F / ENPD ≤ 1.2, where F is the effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens.

[0010] In one embodiment, the optical lens satisfies: 1.5≤F / H≤2, where F is the effective focal length of the optical lens and H is the image height corresponding to the maximum field of view of the optical lens.

[0011] In one embodiment, the optical lens satisfies: TTL / F≤5.5, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens, and F is the effective focal length of the optical lens.

[0012] In one embodiment, the optical lens satisfies: 1≤F1 / F≤13, where F1 is the effective focal length of the first lens and F is the effective focal length of the optical lens.

[0013] In one implementation, the optical lens satisfies: in, The combined optical power of the second and third lenses. This refers to the optical focal length of the lens.

[0014] In one embodiment, the optical lens satisfies: SAG3 / (D3 / 2)<0, where SAG3 is the on-axis distance between the intersection of the first side surface of the second lens and the optical axis and the vertex of the effective radius of the first side surface of the second lens, and D3 is the maximum aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens.

[0015] In one embodiment, the optical lens satisfies: (FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0016] In one embodiment, the optical lens satisfies: 0.3≤|F / R3|+|F / R4|≤1.5, where F is the effective focal length of the optical lens, R3 is the radius of curvature of the first side surface of the second lens, and R4 is the radius of curvature of the second side surface of the second lens.

[0017] In one embodiment, the optical lens satisfies: -10≤F6 / (R11+R12)≤-3, where F6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens.

[0018] In one embodiment, the optical lens satisfies: (R11+R12) / TTL≤1, where R11 is the radius of curvature of the first side surface of the sixth lens, R12 is the radius of curvature of the second side surface of the sixth lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging surface of the optical lens.

[0019] In one implementation, the optical lens satisfies: in, The combined optical power of the fourth and fifth lenses. The combined optical power of the fifth and sixth lenses. This refers to the optical focal length of the lens.

[0020] In one embodiment, the optical lens satisfies: 0.5≥(R14+|R14|) / F / R13≥0.05, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, and F is the effective focal length of the optical lens.

[0021] In one embodiment, the optical lens satisfies: 0.8≥(R16+|R16|) / F / R15≥0.05, where R15 is the radius of curvature of the first side of the eighth lens, R16 is the radius of curvature of the second side of the eighth lens, and F is the effective focal length of the optical lens.

[0022] In one embodiment, the optical lens satisfies: 0.8≤(D9+D10) / 2 / F≤3, where D9 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D10 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, and F is the effective focal length of the optical lens.

[0023] In one embodiment, the optical lens satisfies: 0.1≤R15 / (d16+R16)≤1, where R15 is the radius of curvature of the first side of the eighth lens, R16 is the radius of curvature of the second side of the eighth lens, and d16 is the center thickness of the eighth lens on the optical axis.

[0024] In one embodiment, the optical lens satisfies: D16 / D8≤0.7, where D8 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, and D16 is the maximum aperture of the second side of the eighth lens corresponding to the maximum field of view of the optical lens.

[0025] In one embodiment, the optical lens satisfies: 0.2≤D15 / Dmax≤0.8, where D15 is the maximum aperture of the first side of the eighth lens corresponding to the maximum field of view of the optical lens, and Dmax is the maximum aperture of the optical lens corresponding to the maximum field of view of the optical lens.

[0026] In one embodiment, the optical lens satisfies: 1≤F4 / F≤8, where F4 is the effective focal length of the fourth lens and F is the effective focal length of the optical lens.

[0027] In one embodiment, the optical lens satisfies: 1≤F5 / F≤5, where F5 is the effective focal length of the fifth lens and F is the effective focal length of the optical lens.

[0028] In one embodiment, the optical lens satisfies: F6 / F≤-3.5, where F6 is the effective focal length of the sixth lens and F is the effective focal length of the optical lens.

[0029] In one implementation, the optical lens satisfies: in, The combined optical power of the fourth and fifth lenses. This refers to the optical focal length of the lens.

[0030] In one implementation, the optical lens satisfies: FOV / F≤4, where FOV is the maximum field of view of the optical lens and F is the effective focal length of the optical lens.

[0031] In one embodiment, the optical lens satisfies: 0.5≤R13 / F≤2, where R13 is the radius of curvature of the first side surface of the seventh lens, and F is the effective focal length of the optical lens.

[0032] In one embodiment, the optical lens satisfies: 0.3≤R14 / F≤3, where R14 is the radius of curvature of the second side surface of the seventh lens, and F is the effective focal length of the optical lens.

[0033] In one embodiment, the optical lens satisfies: 0.3≤R15 / F≤2, where R15 is the radius of curvature of the first side surface of the eighth lens, and F is the effective focal length of the optical lens.

[0034] In one embodiment, the optical lens satisfies: 0.3≤R16 / F≤7, where R16 is the radius of curvature of the second side surface of the eighth lens, and F is the effective focal length of the optical lens.

[0035] In one embodiment, the optical lens satisfies: |R13 / F7|≤0.8, where R13 is the radius of curvature of the first side surface of the seventh lens, and F7 is the effective focal length of the seventh lens.

[0036] In one embodiment, the optical lens satisfies: 0.2≤R13 / (d14+R14)≤1.1, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, and d14 is the center thickness of the seventh lens on the optical axis.

[0037] In one embodiment, the optical lens satisfies: |R15 / F8|≤0.9, where R15 is the radius of curvature of the first side surface of the eighth lens, and F8 is the effective focal length of the eighth lens.

[0038] In one embodiment, the optical lens further includes an aperture stop disposed between the third lens and the fourth lens or between the fifth lens and the sixth lens.

[0039] In one embodiment, the first and second sides of the eighth lens are aspherical mirror surfaces.

[0040] A second aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along the optical axis: a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, a seventh lens with either positive or negative optical power, and an eighth lens with either positive or negative optical power. The optical lens satisfies the condition: F6 / F ≤ -3.5, where F6 is the effective focal length of the sixth lens, and F is the effective focal length of the optical lens.

[0041] In one embodiment, the optical lens sequentially includes, from the first side to the second side along the optical axis: a first lens having positive optical power, a second lens having negative optical power, a third lens having negative optical power, a fourth lens having positive optical power, a fifth lens having positive optical power, a sixth lens having negative optical power, a seventh lens having either positive or negative optical power, and an eighth lens having either positive or negative optical power. The optical lens satisfies the following parameters: F6 / F≤-3.5, 0.5≤R13 / F≤2, 0.3≤R14 / F≤3, 0.3≤R15 / F≤2, 0.3≤R16 / F≤7. Here, F6 is the effective focal length of the sixth lens, F is the effective focal length of the optical lens, R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, R15 is the radius of curvature of the first side of the eighth lens, and R16 is the radius of curvature of the second side of the eighth lens. By setting the above combination of optical power, the focal length of the sixth lens, and the radii of curvature of the seventh and eighth lenses, the lens resolution can be improved while increasing the amount of light transmitted.

[0042] In one embodiment, the first lens has a first side surface that is convex and a second side surface that is concave; the second lens has a first side surface that is concave and a second side surface that is either convex or concave; the third lens has a first side surface that is concave and a second side surface that is either convex or concave; the fourth lens has a first side surface that is convex and a second side surface that is either convex or concave; the fifth lens has a first side surface that is convex and a second side surface that is either convex or concave; the sixth lens has a first side surface that is convex and a second side surface that is concave; the seventh lens has a first side surface that is convex and a second side surface that is concave; and the eighth lens has a first side surface that is convex and a second side surface that is concave.

[0043] In one embodiment, the optical lens satisfies at least one of the following: TTL / H / FOV≤0.3, D / H / FOV≤0.15, (F×θ) / D≤0.5, (FOV×F) / H≥50, FOV / F≤4, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface 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, D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, F is the effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens.

[0044] In one embodiment, the optical lens satisfies at least one of the following: BFL / TTL≤0.15, F / ENPD≤1.2, 1.5≤F / H≤2, TTL / F≤5.5, 1≤F1 / F≤13, where BFL is the distance on the optical axis from the center of the second side of the eighth lens to the imaging plane of the optical lens, TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, F is the effective focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F1 is the effective focal length of the first lens.

[0045] In one implementation, the optical lens satisfies: in, The combined optical power of the second and third lenses. This refers to the optical focal length of the lens.

[0046] In one embodiment, the optical lens satisfies at least one of the following: SAG3 / (D3 / 2)<0, 0.3≤|F / R3|+|F / R4|≤1.5, where SAG3 is the on-axis distance between the intersection of the first side surface of the second lens and the optical axis and the vertex of the effective radius of the first side surface of the second lens, D3 is the maximum aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens, F is the effective focal length of the optical lens, R3 is the radius of curvature of the first side surface of the second lens, and R4 is the radius of curvature of the second side surface of the second lens.

[0047] In one embodiment, the optical lens satisfies at least one of the following: -10≤F6 / (R11+R12)≤-3, (R11+R12) / TTL≤1, where F6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the first side of the sixth lens, R12 is the radius of curvature of the second side of the sixth lens, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens.

[0048] In one implementation, the optical lens satisfies: in, The combined optical power of the fourth and fifth lenses. The combined optical power of the fifth and sixth lenses. This refers to the optical focal length of the lens.

[0049] In one embodiment, the optical lens satisfies at least one of the following: 0.5 ≥ (R14 + |R14|) / F / R13 ≥ 0.05, 0.5 ≤ R13 / F ≤ 2, 0.3 ≤ R14 / F ≤ 3, |R13 / F7| ≤ 0.8, 0.2 ≤ R13 / (d14 + R14) ≤ 1.1, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, F is the effective focal length of the optical lens, F7 is the effective focal length of the seventh lens, and d14 is the center thickness of the seventh lens on the optical axis.

[0050] In one embodiment, the optical lens satisfies at least one of the following: 0.8 ≥ (R16 + |R16|) / F / R15 ≥ 0.05, 0.1 ≤ R15 / (d16 + R16) ≤ 1, 0.2 ≤ D15 / Dmax ≤ 0.8, 0.3 ≤ R15 / F ≤ 2, 0.3 ≤ R16 / F ≤ 7, |R15 / F8| ≤ 0.9, where R15 is the radius of curvature of the first side of the eighth lens, R16 is the radius of curvature of the second side of the eighth lens, F is the effective focal length of the optical lens, d16 is the center thickness of the eighth lens on the optical axis, D15 is the maximum aperture of the first side of the eighth lens corresponding to the maximum field of view of the optical lens, Dmax is the maximum aperture of the optical lens corresponding to the maximum field of view of the optical lens, and F8 is the effective focal length of the eighth lens.

[0051] In one embodiment, the optical lens satisfies at least one of the following: 0.8≤(D9+D10) / 2 / F≤3, 1≤F5 / F≤5, where D9 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D10 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, F is the effective focal length of the optical lens, F5 is the effective focal length of the fifth lens, and F is the effective focal length of the optical lens.

[0052] In one embodiment, the optical lens satisfies: D16 / D8≤0.7, where D8 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, and D16 is the maximum aperture of the second side of the eighth lens corresponding to the maximum field of view of the optical lens.

[0053] In one embodiment, the optical lens satisfies: 1≤F4 / F≤8, where F4 is the effective focal length of the fourth lens and F is the effective focal length of the optical lens.

[0054] In one implementation, the optical lens satisfies: in, The combined optical power of the fourth and fifth lenses. This refers to the optical focal length of the lens.

[0055] In one embodiment, the optical lens further includes an aperture stop disposed between the third lens and the fourth lens or between the fifth lens and the sixth lens.

[0056] In one embodiment, the first and second sides of the eighth lens are aspherical mirror surfaces.

[0057] In one embodiment, the optical lens satisfies at least one of the following: 0.18≤TTL / H / FOV≤0.24, 0.08≤D / H / FOV≤0.12, 0.28≤(F×θ) / D≤0.39, 57≤(FOV×F) / H≤60, 1.7≤FOV / F≤1.9, 0.08≤BFL / TTL≤0.14, 0.7≤F / ENPD≤1.0, 1.7≤F / H≤1.9, 3≤TTL / F≤4.1, 2.4≤F1 / F≤10.2. -0.27≤SAG3 / (D3 / 2)≤-0.1, 0.5≤|F / R3|+|F / R4|≤1.25, -9≤F6 / (R11+R12)≤-5, 0.3≤(R11+R12) / TTL≤0.7, -15≤F6 / F≤-8, 0.08≤(R14+|R14|) / F / R13≤0.25, 0.7≤R13 / F≤0.93, 0.52≤R14 / F≤1.9, 0.049≤|R13 / F7|≤0.5,0.39≤R13 / (d14+R14)≤0.9,0.1≤(R16+|R16|) / F / R15≤0.6,0.18≤R15 / (d 16+R16)≤0.8, 0.4≤D15 / Dmax≤0.7, 0.5≤R15 / F≤1.1, 0.6≤R16 / F≤4.9, 0.08≤|R15 / F 8|≤0.67, 1.3≤(D9+D10) / 2 / F≤2.2, 1.7≤F5 / F≤3.3, 0.35≤D16 / D8≤0.5, 2≤F4 / F≤6.5, Where TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane 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, D is the maximum aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, F is the effective focal length of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, BFL is the distance on the optical axis from the center of the second side surface of the eighth lens to the imaging plane of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and F1 is the effective focal length of the first lens. The combined optical power of the second and third lenses. Where F is the optical power of the lens, SAG3 is the axial distance between the intersection of the first side surface of the second lens and the optical axis and the vertex of the effective radius of the first side surface of the second lens, D3 is the maximum aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens, R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, F6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens. The combined optical power of the fourth and fifth lenses. The combined optical power of the fifth and sixth lenses. R13 is the optical power of the lens; R14 is the radius of curvature of the first side of the seventh lens; F7 is the effective focal length of the seventh lens; d14 is the center thickness of the seventh lens on the optical axis; R15 is the radius of curvature of the first side of the eighth lens; R16 is the radius of curvature of the second side of the eighth lens; d16 is the center thickness of the eighth lens on the optical axis; D15 is the maximum aperture of the first side of the eighth lens corresponding to the maximum field of view of the lens; Dmax is the maximum aperture of the maximum field of view of the lens; F8 is the effective focal length of the eighth lens; D9 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the lens; D10 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the lens; F5 is the effective focal length of the fifth lens; D8 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the lens; D16 is the maximum aperture of the second side of the eighth lens corresponding to the maximum field of view of the lens; F4 is the effective focal length of the fourth lens. The combined optical power of the fourth and fifth lenses. This refers to the optical focal length of the lens.

[0058] A third aspect of this application provides an electronic device. This electronic device includes an optical lens according to this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0059] This application employs eight lenses. By optimizing the shape and optical power of each lens, the optical lens achieves at least one beneficial effect such as miniaturization, high resolution, large aperture, and high light transmission, enabling the optical lens to better meet the high requirements of automotive applications (e.g., autonomous driving assistance systems). Attached Figure Description

[0060] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. In the drawings:

[0061] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0062] Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0063] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0064] Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown;

[0065] Figure 5A A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown;

[0066] Figure 5B A dot diagram of an optical lens according to Embodiment 5 of this application is shown;

[0067] Figure 5C The diffraction ingress energy curve of the optical lens according to Embodiment 5 of this application is shown;

[0068] Figure 5D The modulation transfer function curve of the optical lens according to Embodiment 5 of this application is shown;

[0069] Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown;

[0070] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown;

[0071] Figure 8A A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown;

[0072] Figure 8B A dot diagram of an optical lens according to Embodiment 8 of this application is shown;

[0073] Figure 8C The diffraction ingress energy curve of the optical lens according to Embodiment 8 of this application is shown;

[0074] Figure 8D The modulation transfer function curve of the optical lens according to Embodiment 8 of this application is shown;

[0075] Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown;

[0076] Figure 10A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown;

[0077] Figure 11A A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown;

[0078] Figure 11B A dot diagram of an optical lens according to Embodiment 11 of this application is shown;

[0079] Figure 11C The diffraction ingress energy curve of the optical lens according to Embodiment 11 of this application is shown;

[0080] Figure 11D The modulation transfer function curve of the optical lens according to Embodiment 11 of this application is shown; and

[0081] Figures 12 to 20 Schematic diagrams of the optical lenses according to Embodiments 12 to 20 of this application are shown respectively. Detailed Implementation

[0082] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0083] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0084] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0085] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, the surface of each lens closest to the second side is called the second side surface of the lens, and the surface of an optical lens closest to the second side is called the second side surface of the optical lens.

[0086] It should be understood that the optical lens provided in this application can be used for photography, projection, and LiDAR lenses. When the optical lens provided in this application is used as a camera lens or a LiDAR receiver lens, the camera lens can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. In this document, "first side" can refer to the object side, and "second side" can refer to the image side. Light from the object side can form an image on the image side. When the optical lens provided in this application is used as a projection lens or a LiDAR transmitter lens, "first side" can refer to the object side, and "second side" can refer to the light source side. Light from the light source side is projected onto the first side after passing through the optical lens, and an image or an illuminated area is formed on the first side.

[0087] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0088] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0089] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0090] The features, principles and other aspects of this application are described in detail below.

[0091] In an exemplary embodiment, the optical lens includes, for example, eight lenses with optical power, namely 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. These eight lenses are arranged sequentially along the optical axis from the first side to the second side.

[0092] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a vehicle-mounted lens or a lidar receiver lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens can be provided with an imaging surface.

[0093] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitter lens. In this case, the first side of the optical lens can be the object side, and the second side can be the light source side. Light from the light source side is projected onto the object side after passing through the optical lens, forming an image or illuminating an area on the object side. The second side of the optical lens can be provided with the light source surface of the optical lens.

[0094] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0095] In an exemplary embodiment, the first lens has positive optical power, a first convex side surface, and a second concave side surface. The positive optical power and convex first side surface of the first lens allow for the collection of more light into the rear optical system. The concave second side surface of the first lens facilitates smoother light entry into the rear optical system, contributing to the system's low sensitivity and small aperture characteristics. Furthermore, the convex design of the first side surface of the first lens also helps to reduce the impact of water droplets on imaging during practical applications.

[0096] In an exemplary embodiment, the first lens may preferably use a high refractive index material, which is beneficial for reducing the front port diameter and improving the imaging quality.

[0097] In an exemplary embodiment, the second lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the second lens allows it to collect light emitted from the first lens, appropriately diffusing the light and providing a larger light-receiving surface for the rear optical system, thus increasing image illumination. The concave-convex shape of the second lens smoothly transitions light from the first lens to the rear optical system. Specifically, the concave design of the first side of the second lens, in conjunction with the concave second side of the first lens, ensures that light emitted from the first lens smoothly enters the first side of the second lens, improving the sensitivity of both lenses. The convex second side of the second lens also facilitates a smooth transition of light to the rear optical system while appropriately converging and reducing the rear aperture.

[0098] In an exemplary embodiment, the second lens has negative optical power, with both its first and second sides being concave. The negative optical power of the second lens allows it to collect light emitted from the first lens. The concave shape of the second lens enables rapid collection of light entering the optical system after passing through the first lens, facilitating proper light diffusion, increasing the aperture diameter, and improving the light transmission aperture, thus achieving a small FNO and high luminous flux in the system. The concave design of the first side of the second lens, in conjunction with the concave shape of the second side of the first lens, allows light emitted from the first lens to smoothly enter the first side of the second lens, improving the sensitivity of both lenses. The concave shape of the second side of the second lens, with a large radius of curvature, allows light to be appropriately lifted, enabling peripheral light to reach a higher imaging position, reducing light energy loss caused by excessive angle between the light reaching the image plane and the chip's principal ray, and improving the illumination of the edge field of view.

[0099] In an exemplary embodiment, the third lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the third lens further diffuses the light from the second lens, appropriately adjusting the light path; the concave-convex shape of the third lens allows the light passing through the first lens to smoothly transition to the rear optical system. The concave design of the first side of the third lens enables it to collect as much light as possible from the peripheral field of view, reducing light energy loss; the convex design of the second side of the third lens allows the light to smoothly transition to the rear optical system, while also appropriately converging and reducing the rear aperture.

[0100] In an exemplary embodiment, the third lens has negative optical power, with its first and second sides being concave. The negative optical power of the third lens allows it to collect light entering through the front lens and, as much as possible, light exiting through the second lens. This facilitates proper light diffusion, increases the aperture diameter, and enhances the light transmission aperture, achieving a small FNO and high luminous flux in the system. The concave design of the first side of the third lens allows it to collect as much light as possible from the second lens, reducing light energy loss. The concave second side of the third lens, with a large radius of curvature, allows light to be appropriately raised, enabling peripheral light to reach a higher imaging position. This reduces light energy loss caused by excessive angles between the light reaching the image plane and the chip's principal ray, thus improving the illumination of the edge field of view.

[0101] In an exemplary embodiment, the fourth lens has positive optical power, with both its first and second sides being convex. The positive optical power of the fourth lens facilitates light convergence. The convex design of the first side of the fourth lens compresses the height of light rays incident through the third lens, while the convex design of the second side further converges the light rays exiting the third lens, allowing them to smoothly enter the rear optical system. This enables as much light from the peripheral field of view as possible to pass through the aperture and enter the rear system quickly, increasing overall light transmission and illumination. It also helps reduce the front aperture of the lens and, when used in conjunction with the focal length of the fifth lens, facilitates adjusting the optical path difference between light rays from different fields of view, achieving high resolution.

[0102] In an exemplary embodiment, the fourth lens has positive optical power, with its first side being convex and its second side being concave. The positive optical power of the fourth lens facilitates light convergence. The convex-concave shape of the fourth lens allows light to converge to a certain extent, promoting a smoother transition of light paths throughout the system and reducing sensitivity. The convex design of the first side of the fourth lens allows for more efficient light convergence and reduces defocusing between different fields of view, thus improving resolution. The concave design of the second side of the fourth lens allows for the collection of as much light as possible from the peripheral fields of view, reducing light loss and improving illumination at the edges. Simultaneously, it alters the edge light path, enabling a reduction in the lens's front aperture and achieving a miniaturized design.

[0103] In an exemplary embodiment, the fifth lens has positive optical power, and its first side surface is convex, as are its second side surface. The positive optical power of the fifth lens facilitates light convergence, and its convex-convex shape further converges the divergent light rays from the second and third lenses, promoting a smooth transition of light paths throughout the system and reducing sensitivity. Furthermore, the convex-convex shape allows light rays to converge towards the image plane while adjusting aberrations in each field of view, thus improving resolving power.

[0104] In an exemplary embodiment, the fifth lens has positive optical power, with its first side being convex and its second side being concave. The positive optical power of the fifth lens facilitates light convergence. The convex-concave meniscus shape of the fifth lens further converges light rays diverging from the second and third lenses, promoting a smooth transition of light paths throughout the system and reducing sensitivity. The convex design of the first side of the fifth lens allows light rays to converge within the lens, reducing the distribution range of light rays from the same field of view on the second side and weakening the coupling relationship between light rays from different fields of view on the second side. This facilitates better correction of light rays from each field of view and improves the system's resolving power. The concave design of the second side of the fifth lens ensures a smooth transition of light paths, further enhancing resolving power.

[0105] In an exemplary embodiment, the sixth lens has negative optical power, with its first side being convex and its second side being concave. The negative optical power and the crescent-shaped (convex-concave) design of the sixth lens (the shapes of the first and second sides are nearly concentric circles) facilitate a smooth transition of converging light rays from the large aperture at the front end. The convex first side of the sixth lens helps collect more light from the edge fields of view; the concave second side of the sixth lens allows for a smooth transition of outgoing light rays, which is beneficial for correcting light rays in each field of view. Furthermore, the sixth lens primarily serves to smooth the transition, reducing its ability to diverge light, allowing its F6 value to approach infinity.

[0106] In an exemplary embodiment, the seventh lens has positive optical power, with a convex first side and a concave second side. The seventh lens, with its positive optical power and convex-concave meniscus shape, allows for a smooth transition of converging light rays from the large aperture at the front end. Simultaneously, appropriate light convergence reduces the back focal length to some extent, thereby reducing the overall system length. The convex first side of the seventh lens facilitates the collection of more light; the concave second side allows for a smooth transition of outgoing light rays, which is beneficial for correcting light rays in different fields of view.

[0107] In an exemplary embodiment, the seventh lens has negative optical power, with its first side surface being convex and its second side surface being concave. The seventh lens, with its negative optical power and convex-concave crescent shape (the shapes of the first and second sides are approximately concentric circles), allows for a smooth transition of converging light rays from the large aperture at the front end. The convex first side surface of the seventh lens facilitates the collection of more light; the concave second side surface of the seventh lens allows for a smooth transition of outgoing light rays, which is beneficial for correcting light rays in different fields of view.

[0108] In an exemplary embodiment, the eighth lens may have positive optical power, with its first side surface being convex and its second side surface being concave. The positive optical power of the eighth lens facilitates rapid light convergence, and its convex-concave crescent shape (the shapes of the first and second sides are nearly concentric circles) allows for a smooth transition of converging light from a large aperture at the front, reducing the back focal length to some extent and thus reducing the overall system length. Furthermore, the eighth lens may also have negative optical power. In this application, the effective focal length F8 of the eighth lens in several embodiments exceeds 100mm. The ability of the eighth lens to converge light is reduced, primarily serving to smoothly transition light. Since the eighth lens has a convex-concave crescent shape, tending towards concentric circles, the F8 value can approach infinity. Therefore, through reasonable design, an eighth lens with negative optical power and a convex-concave crescent shape can be obtained.

[0109] In an exemplary embodiment, both the first and second sides of the eighth lens are aspherical mirrors. The curvature of the aspherical surface varies at different locations, which is beneficial for correcting system aberrations and field curvature, thereby improving the resolving power of the optical system.

[0110] In an exemplary embodiment, an aperture stop for limiting the light beam may be disposed between the third and fourth lenses. In some embodiments of this application, the aperture stop may also be disposed between the fifth and sixth lenses. However, it should be noted that the positions of the aperture stops disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be disposed in other positions as needed.

[0111] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / H / FOV ≤ 0.3, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. Satisfying TTL / H / FOV ≤ 0.3 is beneficial for reducing the overall length of the optical system and achieving miniaturization. More specifically, TTL, H, and FOV can further satisfy: 0.18 ≤ TTL / H / FOV ≤ 0.24, which can further reduce the overall length of the optical system and better achieve lens miniaturization.

[0112] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: D / H / FOV ≤ 0.15, where D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. Satisfying D / H / FOV ≤ 0.15 is beneficial for reducing the front aperture and achieving miniaturization. More specifically, D, H, and FOV can further satisfy: 0.08 ≤ D / H / FOV ≤ 0.12, which can better achieve lens miniaturization.

[0113] In an exemplary embodiment, the optical lens according to this application satisfies: (F×θ) / D≤0.5, where F is the effective focal length of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, and D is the maximum aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens. Satisfying (F×θ) / D≤0.5 allows for a smaller front aperture of the lens, reducing the size of the lens's imaging system, while also enabling the lens to meet telephoto characteristics, which is beneficial for achieving long-distance detection. F, θ, and D can further satisfy: 0.28≤(F×θ) / D≤0.39, which is beneficial for further miniaturization and telephoto characteristics.

[0114] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: BFL / TTL ≤ 0.15, where BFL is the distance on the optical axis from the center of the second side surface of the eighth lens to the imaging plane of the optical lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. Satisfying BFL / TTL ≤ 0.15 helps meet the special requirement of a short back focal length for the optical lens, ensuring sufficient space for component mounting and focusing while achieving a reduction in the overall system length and miniaturization. Furthermore, BFL and TTL can satisfy: 0.08 ≤ BFL / TTL ≤ 0.14, which further facilitates achieving the characteristics of a short back focal length and miniaturization.

[0115] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: F / ENPD ≤ 1.2, where F is the effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. Satisfying F / ENPD ≤ 1.2 ensures a smaller aperture number, which is beneficial for increasing light transmission. Increasing the entrance pupil diameter helps improve relative illumination. F and ENPD can further satisfy: 0.7 ≤ F / ENPD ≤ 1.0, to better achieve high light transmission.

[0116] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: 1.5 ≤ F / H ≤ 2, where F is the effective focal length of the optical lens and H is the image height corresponding to the maximum field of view of the optical lens. Satisfying 1.5 ≤ F / H ≤ 2, controlling the focal length and image height of the optical lens within a certain range, is beneficial for improving resolution. More specifically, F and H can further satisfy: 1.7 ≤ F / H ≤ 1.9, which is beneficial for further improving resolving power.

[0117] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / F ≤ 5.5, where TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens, and F is the effective focal length of the optical lens. Satisfying TTL / F ≤ 5.5 is beneficial for miniaturization, but if TTL / F is too small, the system sensitivity will be high. A larger TTL / F can be beneficial for resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, small FNO, and sensitivity, TTL and F can further satisfy: 3 ≤ TTL / F ≤ 4.1.

[0118] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ F1 / F ≤ 13, where F1 is the effective focal length of the first lens and F is the effective focal length of the optical lens. Controlling the effective focal length of the first lens to be positive and within a certain range allows for the collection of more light into the rear optical system, which is beneficial for increasing light transmission energy and minimizing light deflection, thus improving resolution. More specifically, F1 and F can further satisfy: 2.4 ≤ F1 / F ≤ 10.2, which further optimizes the focal length of the first lens and enhances resolving power.

[0119] In an exemplary embodiment, the optical lens according to this application can satisfy: in, The combined optical power of the second and third lenses. This refers to the optical focal length of the lens. (This must be satisfied.) The combined optical power of the second and third lenses is negative, which effectively diverges light and helps to enlarge the aperture. More specifically, and Further, it can be satisfied: It can better enlarge the light-transmitting aperture.

[0120] In an exemplary embodiment, the optical lens according to this application satisfies: SAG3 / (D3 / 2) < 0, where SAG3 is the axial distance between the intersection of the first side surface of the second lens and the optical axis and the vertex of the effective radius of the first side surface of the second lens, and D3 is the maximum aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens. Satisfying SAG3 / (D3 / 2) < 0 allows for a reasonable setting of the sag and effective aperture of the first side surface of the second lens, ensuring light divergence and enabling a smooth transition of peripheral light, which is beneficial for reducing lens sensitivity and increasing overall light transmission. SAG3 and D3 can further satisfy: -0.27 ≤ SAG3 / (D3 / 2) ≤ -0.1, which can further optimize the sag and effective aperture of the first side surface of the second lens, reducing lens sensitivity and increasing overall light transmission.

[0121] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: (FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. Satisfying (FOV×F) / H≥50 ensures that the lens has a longer focal length within a sufficient field of view, which is beneficial for long-distance detection. More specifically, FOV, F, and H can further satisfy: 57≤(FOV×F) / H≤60, which better maintains the telephoto characteristics and enables long-distance detection.

[0122] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ |F / R3| + |F / R4| ≤ 1.5, where F is the effective focal length of the optical lens, R3 is the radius of curvature of the first side of the second lens, and R4 is the radius of curvature of the second side of the second lens. Satisfying 0.3 ≤ |F / R3| + |F / R4| ≤ 1.5, and reasonably controlling the radii of curvature of the two sides of the second lens, can ensure light divergence, which is beneficial to expanding the aperture and effectively correcting aberrations to improve image quality. F, R3, and R4 can further satisfy: 0.5 ≤ |F / R3| + |F / R4| ≤ 1.25, which can further control the radii of curvature of the two sides of the second lens and improve resolving power.

[0123] In an exemplary embodiment, the optical lens according to this application satisfies: -10≤F6 / (R11+R12)≤-3, where F6 is the effective focal length of the sixth lens, R11 is the radius of curvature of the first side surface of the sixth lens, and R12 is the radius of curvature of the second side surface of the sixth lens. Satisfying -10≤F6 / (R11+R12)≤-3 makes the focal length of the sixth lens negative, which is beneficial for smooth light transition and effectively corrects aberrations to improve image quality. F6, R11, and R12 can further satisfy: -9≤F6 / (R11+R12)≤-5, which can further control the focal length and surface shape of the sixth lens and improve resolving power.

[0124] In an exemplary embodiment, the optical lens according to this application satisfies: (R11+R12) / TTL≤1, where R11 is the radius of curvature of the first side of the sixth lens, R12 is the radius of curvature of the second side of the sixth lens, and TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging plane of the optical lens. Satisfying (R11+R12) / TTL≤1 controls the radii of curvature of both sides of the sixth lens to be positive, which can appropriately guide light and improve resolution. More specifically, R11, R12, and TTL can further satisfy: 0.3≤(R11+R12) / TTL≤0.7, which can further improve resolution.

[0125] In an exemplary embodiment, the optical lens according to this application can satisfy: in, The combined optical power of the fourth and fifth lenses. The combined optical power of the fifth and sixth lenses. This refers to the optical focal length of the lens. (This must be satisfied.) The combined optical power of the fourth to sixth lenses is positive, which can effectively converge light rays and also help correct aberrations and improve lens resolution. and Further, it can be satisfied: It can further achieve high resolution.

[0126] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≥ (R14 + |R14|) / F / R13 ≥ 0.05, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.5 ≥ (R14 + |R14|) / F / R13 ≥ 0.05, the shape of the seventh lens is a crescent shape curving towards the second side, which helps to smooth the light path, correct aberrations, and improve resolution energy. R13, R14, and F can further satisfy: 0.08 ≤ (R14 + |R14|) / F / R13 ≤ 0.25, which can further optimize the surface shape of the seventh lens and achieve high resolution.

[0127] In an exemplary embodiment, the optical lens according to this application satisfies: 0.8 ≥ (R16 + |R16|) / F / R15 ≥ 0.05, where R15 is the radius of curvature of the first side of the eighth lens, R16 is the radius of curvature of the second side of the eighth lens, and F is the effective focal length of the optical lens. Satisfying 0.8 ≥ (R16 + |R16|) / F / R15 ≥ 0.05, the shape of the eighth lens is a crescent shape curving towards the second side, which helps to smooth the light path, correct aberrations, and improve resolution. R15, R16, and F can further satisfy: 0.1 ≤ (R16 + |R16|) / F / R15 ≤ 0.6, which can further optimize the surface shape of the eighth lens and achieve high resolution.

[0128] In an exemplary embodiment, the optical lens according to this application satisfies: 0.8 ≤ (D9 + D10) / 2 / F ≤ 3, where D9 is the maximum aperture of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, D10 is the maximum aperture of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, and F is the effective focal length of the optical lens. Satisfying 0.8 ≤ (D9 + D10) / 2 / F ≤ 3, the aperture of the fifth lens is reasonably controlled, which is beneficial to achieving system miniaturization while ensuring a small FNO. D9, D10, and F can further satisfy: 1.3 ≤ (D9 + D10) / 2 / F ≤ 2.2, which can further control the aperture of the fifth lens, achieving system miniaturization and ensuring a small FNO.

[0129] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ R15 / (d16+R16) ≤ 1, where R15 is the radius of curvature of the first side of the eighth lens, R16 is the radius of curvature of the second side of the eighth lens, and d16 is the center thickness of the eighth lens on the optical axis. Satisfying 0.1 ≤ R15 / (d16+R16) ≤ 1 means that the shapes of the first and second sides of the eighth lens are approximately concentric circles, which helps to smooth the light path, correct aberrations, and improve resolving power. More specifically, R15, R16, and d16 can further satisfy: 0.18 ≤ R15 / (d16+R16) ≤ 0.8, which further controls the shape of the eighth lens and improves resolving power.

[0130] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: D16 / D8 ≤ 0.7, where D8 is the maximum aperture of the second side of the fourth lens corresponding to the maximum field of view of the optical lens, and D16 is the maximum aperture of the second side of the eighth lens corresponding to the maximum field of view of the optical lens. Satisfying D16 / D8 ≤ 0.7 controls the maximum aperture of the fourth lens to be greater than that of the eighth lens, ensuring the system has a larger entrance pupil diameter, which is beneficial for improving the overall light transmission. More specifically, D16 and D8 can further satisfy: 0.35 ≤ D16 / D8 ≤ 0.5, which can further achieve a high light transmission.

[0131] In an exemplary embodiment, the optical lens according to this application satisfies: 0.2 ≤ D15 / Dmax ≤ 0.8, where D15 is the maximum aperture of the first side of the eighth lens corresponding to the maximum field of view of the optical lens, and Dmax is the maximum aperture of the optical lens corresponding to the maximum field of view. Satisfying 0.2 ≤ D15 / Dmax ≤ 0.8 controls the maximum aperture of the eighth lens to be smaller than the maximum lens aperture of the system, which allows for a smaller rear aperture of the lens, thus reducing the size of the imaging system. More specifically, D15 and Dmax can further satisfy: 0.4 ≤ D15 / Dmax ≤ 0.7, which further controls the maximum aperture of the eighth lens, facilitating miniaturization.

[0132] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ F4 / F ≤ 8, where F4 is the effective focal length of the fourth lens and F is the effective focal length of the optical lens. Satisfying 1 ≤ F4 / F ≤ 8 controls the effective focal length of the fourth lens to be positive, causing the diverging light rays from the front-end optical system to converge, which is beneficial for correcting aberrations and improving resolution; it also helps the light path of the entire system to transition smoothly, reducing sensitivity. More specifically, F4 and F can further satisfy: 2 ≤ F4 / F ≤ 6.5, which can further improve resolution and reduce sensitivity.

[0133] In an exemplary embodiment, the optical lens according to this application satisfies: 1 ≤ F5 / F ≤ 5, where F5 is the effective focal length of the fifth lens and F is the effective focal length of the optical lens. Satisfying 1 ≤ F5 / F ≤ 5 controls the focal length of the fifth lens to be positive, causing the diverging light rays from the front-end optical system to converge, which is beneficial for correcting aberrations and improving resolving power. More specifically, F5 and F can further satisfy: 1.7 ≤ F5 / F ≤ 3.3, which can further improve resolving power.

[0134] In an exemplary embodiment, the optical lens according to this application satisfies: F6 / F ≤ -3.5, where F6 is the effective focal length of the sixth lens and F is the effective focal length of the optical lens. Satisfying F6 / F ≤ -3.5 controls the focal length of the sixth lens to be negative and has a relatively large focal length value, which is beneficial for a smooth transition of light path, correcting aberrations, and improving resolving power. More specifically, F6 and F can further satisfy: -15 ≤ F6 / F ≤ -8, which can further improve resolving power.

[0135] In an exemplary embodiment, the optical lens according to this application can satisfy: in, The combined optical power of the fourth and fifth lenses. This refers to the optical focal length of the lens. (This must be satisfied.) By properly controlling the combined optical power of the fourth and fifth lenses, the diverging light rays from the front-end optical system can converge as quickly as possible, which is beneficial for correcting aberrations and improving resolving power. More specifically, and Further, it can be satisfied: This can further improve the resolution capability.

[0136] In an exemplary embodiment, the optical lens according to this application satisfies: FOV / F ≤ 4, where FOV is the maximum field of view of the optical lens, and F is the effective focal length of the optical lens. Satisfying FOV / F ≤ 4 ensures a longer focal length even with a small field of view, which is beneficial for improving angular resolution and enabling long-distance detection. More specifically, FOV and F can further satisfy: 1.7 ≤ FOV / F ≤ 1.9, which better realizes the telephoto characteristics.

[0137] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ R13 / F ≤ 2, where R13 is the radius of curvature of the first side surface of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.5 ≤ R13 / F ≤ 2 controls the radius of curvature R13 of the first side surface of the seventh lens to be positive, and its ratio with F is small, which is beneficial for light convergence without changing the overall smooth trend of light, effectively correcting aberrations and improving image quality. More specifically, R13 and F can further satisfy: 0.7 ≤ R13 / F ≤ 0.93, which can further achieve high resolution.

[0138] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ R14 / F ≤ 3, where R14 is the radius of curvature of the second side surface of the seventh lens, and F is the effective focal length of the optical lens. Satisfying 0.3 ≤ R14 / F ≤ 3 controls the radius of curvature R14 of the second side surface of the seventh lens to be positive and its ratio with F to be small, which is beneficial for light convergence without changing the overall smooth trend of light, effectively correcting aberrations and improving image quality. More specifically, R14 and F can further satisfy: 0.52 ≤ R14 / F ≤ 1.9, which can further achieve high resolution.

[0139] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ R15 / F ≤ 2, where R15 is the radius of curvature of the first side surface of the eighth lens, and F is the effective focal length of the optical lens. Satisfying 0.3 ≤ R15 / F ≤ 2 controls the radius of curvature R15 of the first side surface of the eighth lens to be positive, and its ratio with F is small, which is beneficial for light convergence without changing the overall smooth trend of light, effectively correcting aberrations and improving image quality. More specifically, R15 and F can further satisfy: 0.5 ≤ R15 / F ≤ 1.1, which can further achieve high resolution.

[0140] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ R16 / F ≤ 7, where R16 is the radius of curvature of the second side surface of the eighth lens, and F is the effective focal length of the optical lens. Satisfying 0.3 ≤ R16 / F ≤ 7 controls the radius of curvature R16 of the second side surface of the eighth lens to be positive and its ratio to F to be small, which is beneficial for light convergence without changing the overall smooth trend of the light, effectively correcting aberrations and improving image quality. More specifically, R16 and F can further satisfy: 0.6 ≤ R16 / F ≤ 4.9, which can further achieve high resolution.

[0141] In an exemplary embodiment, the optical lens according to this application satisfies: |R13 / F7|≤0.8, where R13 is the radius of curvature of the first side surface of the seventh lens, and F7 is the effective focal length of the seventh lens. Satisfying |R13 / F7|≤0.8, and reasonably controlling the ratio of the radius of curvature of the first side surface of the seventh lens to the effective focal length of the seventh lens, helps to improve the lens's ability to adjust light aberrations, correct aberrations, and improve resolution. More specifically, R13 and F7 can further satisfy: 0.049≤|R13 / F7|≤0.5, which can further achieve high resolution and reduce sensitivity.

[0142] In an exemplary embodiment, the optical lens according to this application satisfies: 0.2 ≤ R13 / (d14+R14) ≤ 1.1, where R13 is the radius of curvature of the first side of the seventh lens, R14 is the radius of curvature of the second side of the seventh lens, and d14 is the center thickness of the seventh lens on the optical axis. Controlling the radius of curvature and center thickness of the first and second sides of the seventh lens helps to smooth the light path, correct aberrations, and improve resolving power. More specifically, R13, R14, and d14 can further satisfy: 0.39 ≤ R13 / (d14+R14) ≤ 0.9, which can further optimize the radius of curvature and center thickness of the first and second sides of the seventh lens, better correct aberrations, and improve resolving power.

[0143] In an exemplary embodiment, the optical lens according to this application satisfies: |R15 / F8|≤0.9, where R15 is the radius of curvature of the first side surface of the eighth lens, and F8 is the effective focal length of the eighth lens. Satisfying |R15 / F8|≤0.9, and reasonably controlling the ratio of the radius of curvature of the first side surface of the eighth lens to the effective focal length of the eighth lens, helps to improve the lens's ability to adjust light aberrations, correct aberrations, and improve resolution. More specifically, R15 and F8 can further satisfy: 0.08≤|R15 / F8|≤0.67, which can further achieve high resolution and reduce sensitivity.

[0144] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the eighth lens and the imaging surface. The filter can filter light of different wavelengths, and the protective glass can prevent damage to components (e.g., chips) on the second side of the optical lens.

[0145] In an exemplary embodiment, the first to eighth lenses can be spherical lenses or aspherical lenses. This application does not specifically limit the number of spherical and aspherical lenses; when image quality is a primary concern, the number of aspherical lenses can be increased, and even all lenses can be aspherical. Exemplarily, the eighth lens in this application is an aspherical lens. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike spherical lenses, which have a constant curvature from their center to their periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion and astigmatism. Using aspherical lenses can minimize aberrations that occur during imaging, thereby improving the lens's image quality. The use of aspherical lenses helps correct system aberrations and improves resolving power.

[0146] In an exemplary embodiment, the first to eighth lenses can be glass lenses or plastic lenses. This application does not specifically limit the exact number of glass lenses and plastic lenses. Optical lenses made of glass can suppress the shift of the back focus of the optical lens due to temperature changes, thereby improving system stability. At the same time, using glass can avoid problems such as lens blurring caused by high and low temperature changes in the operating environment, and problems affecting the normal use of the lens. Specifically, when temperature performance is a primary concern, the first to eighth lenses can all be made of glass. In applications with lower temperature stability requirements, the first to eighth lenses in the optical lens can also all be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Of course, the first to eighth lenses in the optical lens can also be made of a combination of plastic and glass.

[0147] The optical lens according to the above embodiments of this application can have at least one beneficial effect, such as miniaturization, high resolution, large aperture, low sensitivity, high light transmission, and high performance, by reasonably setting parameters such as the shape of each lens and optical power.

[0148] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described in this specification without departing from the technical solutions claimed in this application. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to including eight lenses. If desired, the optical lens may also include other numbers of lenses. Specific embodiments of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0149] It should be noted that the optical lenses provided in Embodiments 1 to 20 of this application can all achieve good imaging quality, and their dot plots, diffraction ingress energy curves, and modulation transfer function (MTF) curves are quite similar. Therefore, this application only shows the dot plots, diffraction ingress energy curves, and modulation transfer function (MTF) curves of Embodiments 5, 8, and 11 by way of example. The dot plots, diffraction ingress energy curves, and modulation transfer function (MTF) curves of other embodiments are not shown one by one, and those skilled in the art should be able to know them based on the content disclosed in this application.

[0150] MTF stands for modulation transfer function, which describes the ability of an optical system to "reproduce" the object from the image. The horizontal axis of the modulation transfer function (MTF) curve represents spatial frequency, with the unit of spatial frequency being line pairs per millimeter (lp / mm). The vertical axis, Modulus of the OTF, represents the OTF coefficient. The MTF curve of the optical lens provided in this application has an MTF value of 0.4 or higher at 50 lp / mm, which can meet the required image quality.

[0151] The dot plot illustrates the focusing state of light at different wavelengths on the imaging plane. The RMS (Root Mean Square) is used to describe the size of the blur spot caused by wavefront errors or aberrations in the optical system. The RMS radius is an important parameter for evaluating the imaging quality of an optical system. It is obtained by taking the square root of the average sum of the squares of the coordinates of each point of the blur spot relative to the center point, thus quantitatively reflecting the actual spot size of the system. In the dot plot of the optical lens provided in this application, the root mean square radii of the light spots in the edge field of view on the image plane are all less than 19 μm.

[0152] Encircled energy curves describe the energy distribution of a light beam within a specific region after it passes through an optical system, reflecting the concentration of energy in the light spot. Specifically, it refers to the ratio of light intensity or energy within a certain radius of the beam's diffraction pattern to the total intensity or energy. In the encircled energy curve of the optical lens provided in this application, the light spot energy accounts for over 93% of the total light energy within a 15-micrometer diameter circle on the image plane.

[0153] Example 1

[0154] The following is for reference Figure 1 An optical lens according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown.

[0155] like Figure 1 As shown, the optical lens includes, in sequence 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.

[0156] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0157] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0158] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0159] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 1 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 1 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0160] Table 1 shows the radius of curvature R, thickness / distance (it should be understood that the thickness / distance in the row where S1 is located is the center thickness of the first lens L1, the thickness / distance in the row where S2 is located is the distance between the second side surface S2 of the first lens L1 and the first side surface S3 of the second lens L2, the thickness / distance in the row where S3 is located is the center thickness of the second lens L2, and so on), refractive index Nd, and Abbe number Vd of the optical lens of Embodiment 1.

[0161] Table 1

[0162]

[0163]

[0164] In Embodiment 1, the first side surface S15 and the second side surface S16 of the eighth lens L8 can be aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0165]

[0166] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors S15 and S16 in Example 1.

[0167] Table 2

[0168] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -2.3972 4.2329E-08 -5.9566E-08 -3.3407E-09 2.1625E-11 -1.3371E-14 0.0000E+00 0.0000E+00 S16 0.3160 1.1018E-04 -3.0980E-06 1.8953E-07 -3.9604E-09 3.5058E-11 0.0000E+00 0.0000E+00

[0169] The optical lens of Example 1 has an MTF value exceeding 0.62 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 5.2 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 99% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 1 has high resolving power.

[0170] Example 2

[0171] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0172] like Figure 2 As shown, the optical lens includes, in sequence 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.

[0173] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0174] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0175] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0176] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 2 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 2 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0177] Table 3 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 2. Table 4 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0178] Table 3

[0179]

[0180]

[0181] Table 4

[0182] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -1.7911 6.6676E-05 3.9023E-07 -5.9041E-09 5.8686E-11 -2.3868E-13 0.0000E+00 0.0000E+00 S16 3.3019 1.6207E-04 -7.5616E-06 4.4811E-07 -1.0903E-08 1.1203E-10 0.0000E+00 0.0000E+00

[0183] The optical lens of Example 2 has an MTF value exceeding 0.54 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.3 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 99% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 2 has high resolution.

[0184] Example 3

[0185] The following is for reference Figure 3 An optical lens according to Embodiment 3 of this application is described. Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown.

[0186] like Figure 3 As shown, the optical lens includes, in sequence 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.

[0187] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0188] The optical lens may also include an aperture stop STO, which may be located between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be located near the second side surface S10 of the fifth lens L5.

[0189] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0190] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 3 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 3 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0191] Table 5 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 3. Table 6 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0192] Table 5

[0193]

[0194] Table 6

[0195] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -1.7992 5.5893E-07 -9.3581E-07 -6.9263E-09 -3.5527E-11 9.1074E-13 0.0000E+00 0.0000E+00 S16 0.3192 8.1842E-05 -7.1571E-06 2.1703E-07 -4.4955E-09 3.6668E-11 0.0000E+00 0.0000E+00

[0196] The optical lens of Example 3 has an MTF value exceeding 0.54 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.1% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 3 has high resolution.

[0197] Example 4

[0198] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0199] like Figure 4 As shown, the optical lens includes, in sequence 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.

[0200] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0201] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0202] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0203] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 4 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 4 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0204] Table 7 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 4. Table 8 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0205] Table 7

[0206]

[0207]

[0208] Table 8

[0209] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.5077 3.8572E-05 1.3216E-06 -2.3503E-08 3.5766E-10 -2.1695E-12 0.0000E+00 0.0000E+00 S16 1.5220 3.2191E-04 -1.1215E-05 7.4458E-07 -1.7951E-08 1.8271E-10 0.0000E+00 0.0000E+00

[0210] The optical lens of Example 4 has an MTF value exceeding 0.42 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 9.5 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.3% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 4 has high resolution.

[0211] Example 5

[0212] The following is for reference Figure 5A An optical lens according to Embodiment 5 of this application is described. Figure 5A A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0213] like Figure 5A As shown, the optical lens includes, in sequence 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.

[0214] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0215] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0216] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0217] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 5A In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 5A In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0218] Table 9 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 5. Table 10 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0219] Table 9

[0220]

[0221] Table 10

[0222] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -1.9546 7.3704E-06 8.1989E-08 -5.5100E-09 4.5860E-11 -1.6451E-13 0.0000E+00 0.0000E+00 S16 1.8991 1.4451E-04 -3.6035E-06 2.2371E-07 -4.7254E-09 4.5017E-11 0.0000E+00 0.0000E+00

[0223] Figure 5B A dot plot of the optical lens of Embodiment 5 is shown, which illustrates the focusing state of light of different wavelengths on the imaging plane. Figure 5C The diffraction ingress energy curve of the optical lens of Example 5 is shown, which represents the degree of concentration of the light spot energy. Figure 5D The modulation transfer function (MTF) curve of the optical lens of Example 5 is shown. According to... Figures 5B to 5D It can be seen that the optical lens of Example 5 has an MTF value exceeding 0.53 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.9 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 99.1% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 5 has high resolution and can achieve good imaging quality.

[0224] Example 6

[0225] The following is for reference Figure 6An optical lens according to Embodiment 6 of this application is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown.

[0226] like Figure 6 As shown, the optical lens includes, in sequence 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.

[0227] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0228] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0229] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0230] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 6 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 6 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0231] Table 11 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 6. Table 12 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0232] Table 11

[0233]

[0234]

[0235] Table 12

[0236] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.1393 3.1421E-05 6.9810E-07 -7.6567E-09 9.4706E-11 -1.9374E-13 0.0000E+00 0.0000E+00 S16 4.1865 1.8404E-04 -8.0993E-06 4.5709E-07 -1.1043E-08 1.0984E-10 0.0000E+00 0.0000E+00

[0237] The optical lens of Example 6 has an MTF value exceeding 0.52 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 9.2 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.6% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 6 has high resolution.

[0238] Example 7

[0239] The following is for reference Figure 7 An optical lens according to Embodiment 7 of this application is described. Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown.

[0240] like Figure 7 As shown, the optical lens includes, in sequence 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.

[0241] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0242] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0243] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0244] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 7 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 7 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0245] Table 13 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 7. Table 14 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0246] Table 13

[0247]

[0248] Table 14

[0249] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.7240 3.7406E-05 6.7090E-07 -8.7904E-09 9.6604E-11 -4.8144E-13 0.0000E+00 0.0000E+00 S16 3.3518 1.5886E-04 -1.8193E-06 1.5637E-07 -3.0539E-09 3.1592E-11 0.0000E+00 0.0000E+00

[0250] The optical lens of Example 7 has an MTF value exceeding 0.57 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.8% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 7 has high resolution.

[0251] Example 8

[0252] The following is for reference Figure 8A An optical lens according to Embodiment 8 of this application is described. Figure 8A A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown.

[0253] like Figure 8A As shown, the optical lens includes, in sequence 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.

[0254] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0255] The optical lens may also include an aperture stop STO, which may be located between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be located near the second side surface S10 of the fifth lens L5.

[0256] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0257] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 8A In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 8A In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0258] Table 15 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 8. The first to eighth lenses of the optical lens of Embodiment 8 are all spherical lenses.

[0259] Table 15

[0260]

[0261]

[0262] Figure 8B A dot plot of the optical lens of Embodiment 8 is shown, which illustrates the focusing state of light of different wavelengths on the imaging surface. Figure 8C The diffraction entry energy curve of the optical lens of Example 8 is shown, which represents the degree of concentration of the light spot energy. Figure 8D The modulation transfer function (MTF) curve of the optical lens of Example 8 is shown. According to... Figures 8B to 8D It is evident that the optical lens of Example 8 exhibits an MTF value exceeding 0.73 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.0 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for over 97.8% of the total light energy within a 15 μm diameter circle on the image plane. The optical lens provided in Example 8 possesses high resolving power and achieves excellent imaging quality.

[0263] Example 9

[0264] The following is for reference Figure 9 An optical lens according to Embodiment 9 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown.

[0265] like Figure 9As shown, the optical lens includes, in sequence 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.

[0266] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0267] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0268] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0269] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 9 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 9 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0270] Table 16 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 9. Table 17 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 9, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0271] Table 16

[0272]

[0273]

[0274] Table 17

[0275] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.5829 3.0306E-05 1.0012E-06 -2.2444E-08 2.7013E-10 -1.3925E-12 0.0000E+00 0.0000E+00 S16 2.1031 1.4177E-04 2.5859E-07 6.1187E-08 -1.6336E-09 2.2775E-11 0.0000E+00 0.0000E+00

[0276] The optical lens of Example 9 has an MTF value exceeding 0.72 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 5.9 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 97.9% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 9 has high resolution.

[0277] Example 10

[0278] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this application is described. Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown.

[0279] like Figure 10 As shown, the optical lens includes, in sequence 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.

[0280] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0281] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0282] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0283] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 10 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 10 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0284] Table 18 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 10. Table 19 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 10, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0285] Table 18

[0286]

[0287] Table 19

[0288] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.8649 2.9046E-05 4.2138E-07 -5.2178E-09 3.2542E-11 -1.3483E-13 0.0000E+00 0.0000E+00 S16 3.3115 1.6795E-04 -6.4644E-06 4.3030E-07 -1.0763E-08 1.1174E-10 0.0000E+00 0.0000E+00

[0289] The optical lens of Example 10 has an MTF value exceeding 0.52 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.7 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 99.0% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 10 has high resolution.

[0290] Example 11

[0291] The following is for reference Figure 11A An optical lens according to Embodiment 11 of this application is described. Figure 11A A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown.

[0292] likeFigure 11A As shown, the optical lens includes, in sequence 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.

[0293] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0294] The optical lens may also include an aperture stop STO, which may be disposed between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be disposed on the first side surface S11 of the sixth lens L6.

[0295] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0296] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 11A In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 11A In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0297] Table 20 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 11. Table 21 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 11, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0298] Table 20

[0299]

[0300]

[0301] Table 21

[0302] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.5155 2.9274E-05 2.9948E-07 -2.3566E-09 2.4397E-11 -1.3412E-13 0.0000E+00 0.0000E+00 S16 4.8195 1.6315E-04 -5.9666E-06 3.6397E-07 -8.5182E-09 8.5838E-11 0.0000E+00 0.0000E+00

[0303] Figure 11B A dot plot of the optical lens of Embodiment 11 is shown, which illustrates the focusing state of light of different wavelengths on the imaging plane. Figure 11C The diffraction entry energy curve of the optical lens of Example 11 is shown, which represents the degree of concentration of the light spot energy. Figure 11D The modulation transfer function (MTF) curve of the optical lens of Embodiment 11 is shown. According to... Figures 11B to 11D It can be seen that the optical lens of Example 11 has an MTF value exceeding 0.57 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.9 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 99.2% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 11 has high resolution and can achieve good imaging quality.

[0304] Example 12

[0305] The following is for reference Figure 12 An optical lens according to Embodiment 12 of this application is described. Figure 12 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown.

[0306] like Figure 12 As shown, the optical lens includes, in sequence 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.

[0307] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-concave lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a concave-convex lens with positive optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with positive optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0308] The optical lens may also include an aperture stop STO, which may be located between the fifth lens L5 and the sixth lens L6. For example, the aperture stop STO may be located near the second side surface S10 of the fifth lens L5.

[0309] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0310] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 12 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 12 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0311] Table 22 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 12. The first to eighth lenses of the optical lens of Example 12 are all spherical lenses.

[0312] Table 22

[0313]

[0314] The optical lens of Example 12 has an MTF value exceeding 0.73 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 5.9 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 97.7% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 12 has high resolution.

[0315] Example 13

[0316] The following is for reference Figure 13 An optical lens according to Embodiment 13 of this application is described. Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown.

[0317] like Figure 13 As shown, the optical lens includes, in sequence 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.

[0318] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0319] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0320] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0321] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 13In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 13 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0322] Table 23 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 13. Table 24 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 13, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0323] Table 23

[0324]

[0325]

[0326] Table 24

[0327] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.4496 2.0861E-05 3.4428E-06 -7.6953E-08 1.2224E-09 -5.4317E-12 0.0000E+00 0.0000E+00 S16 6.5857 2.2575E-04 -8.3345E-06 4.8206E-07 -9.8001E-09 9.5599E-11 0.0000E+00 0.0000E+00

[0328] The optical lens of Example 13 has an MTF value exceeding 0.45 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane at the edge field of view is 14.8 μm; and in terms of diffraction ingress energy, the light spot energy accounts for more than 95.6% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 13 has high resolution.

[0329] Example 14

[0330] The following is for reference Figure 14 An optical lens according to Embodiment 14 of this application is described. Figure 14 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown.

[0331] like Figure 14 As shown, the optical lens includes, in sequence 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.

[0332] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0333] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0334] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0335] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 14 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 14 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0336] Table 25 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 14. Table 26 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 14, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0337] Table 25

[0338]

[0339] Table 26

[0340] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.1195 -7.4727E-06 5.3136E-06 -1.2623E-07 1.9102E-09 -6.9193E-12 0.0000E+00 0.0000E+00 S16 0.6985 3.7502E-04 -8.9896E-06 8.1296E-07 -2.1101E-08 3.0055E-10 0.0000E+00 0.0000E+00

[0341] The optical lens of Example 14 has an MTF value exceeding 0.42 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 18.3 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 93.2% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 14 has high resolution.

[0342] Example 15

[0343] The following is for reference Figure 15 An optical lens according to Embodiment 15 of this application is described. Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown.

[0344] like Figure 15 As shown, the optical lens includes, in sequence 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.

[0345] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0346] The optical lens may also include an aperture stop STO, which may be positioned between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be positioned near the first side surface S7 of the fourth lens L4.

[0347] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0348] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 15 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 15 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0349] Table 27 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 15. Table 28 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 15, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0350] Table 27

[0351]

[0352]

[0353] Table 28

[0354] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.4567 5.5957E-06 5.5333E-06 -1.8679E-07 3.7960E-09 -2.7866E-11 0.0000E+00 0.0000E+00 S16 -0.0221 3.6764E-04 5.1263E-06 -2.6592E-08 4.8882E-09 -3.1655E-11 0.0000E+00 0.0000E+00

[0355] The optical lens of Example 15 has an MTF value exceeding 0.56 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 96.6% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 15 has high resolution.

[0356] Example 16

[0357] The following is for reference Figure 16 An optical lens according to Embodiment 16 of this application is described. Figure 16 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this application is shown.

[0358] like Figure 16 As shown, the optical lens includes, in sequence 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.

[0359] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-concave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0360] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0361] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0362] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 16 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 16 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0363] Table 29 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 16. Table 30 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 16, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0364] Table 29

[0365]

[0366] Table 30

[0367] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.4618 5.7900E-05 9.2864E-06 -2.9811E-07 6.3685E-09 -3.4394E-11 0.0000E+00 0.0000E+00 S16 0.9452 5.8020E-04 -1.3742E-05 1.7838E-06 -6.0300E-08 1.2111E-09 0.0000E+00 0.0000E+00

[0368] The optical lens of Example 16 has an MTF value exceeding 0.51 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.9 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 95.5% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 16 has high resolution.

[0369] Example 17

[0370] The following is for reference Figure 17 An optical lens according to Embodiment 17 of this application is described. Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 17 of this application is shown.

[0371] like Figure 17 As shown, the optical lens includes, in sequence 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.

[0372] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0373] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0374] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0375] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 17 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 17 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0376] Table 31 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 17. Table 32 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 17, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0377] Table 31

[0378]

[0379]

[0380] Table 32

[0381] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 -0.3208 1.5479E-05 3.4215E-06 -9.6813E-08 2.0250E-09 -1.2257E-11 0.0000E+00 0.0000E+00 S16 0.5947 3.5832E-04 -2.8264E-06 5.1781E-07 -1.3376E-08 2.2733E-10 0.0000E+00 0.0000E+00

[0382] The optical lens of Example 17 has an MTF value exceeding 0.59 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 7.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 96.6% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 17 has high resolution.

[0383] Example 18

[0384] The following is for reference Figure 18 An optical lens according to Embodiment 18 of this application is described. Figure 18 A schematic diagram of the structure of an optical lens according to Embodiment 18 of this application is shown.

[0385] like Figure 18 As shown, the optical lens includes, in sequence 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.

[0386] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0387] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0388] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0389] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 18 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 18 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0390] Table 33 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 18. Table 34 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 18, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0391] Table 33

[0392]

[0393] Table 34

[0394] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 0.2473 -3.4907E-05 1.3054E-06 -4.7974E-08 7.6535E-10 -3.3987E-12 0.0000E+00 0.0000E+00 S16 -0.2543 2.8638E-04 -2.3092E-06 3.6014E-07 -1.0365E-08 1.8882E-10 0.0000E+00 0.0000E+00

[0395] The optical lens of Example 18 has an MTF value exceeding 0.54 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.1% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 18 has high resolution.

[0396] Example 19

[0397] The following is for reference Figure 19 An optical lens according to Embodiment 19 of this application is described. Figure 19 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this application is shown.

[0398] like Figure 19 As shown, the optical lens includes, in sequence 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.

[0399] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0400] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0401] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0402] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 19 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 19 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0403] Table 35 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 19. Table 36 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 19, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0404] Table 35

[0405]

[0406]

[0407] Table 36

[0408] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 0.0842 -4.9895E-05 1.0415E-06 -4.2073E-08 6.7967E-10 -3.4296E-12 0.0000E+00 0.0000E+00 S16 -1.4377 3.4183E-04 -1.9144E-06 3.9245E-07 -1.1619E-08 2.0692E-10 0.0000E+00 0.0000E+00

[0409] The optical lens of Example 19 has an MTF value exceeding 0.59 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 5.7 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 97.7% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 19 has high resolution.

[0410] Example 20

[0411] The following is for reference Figure 20 An optical lens according to Embodiment 20 of this application is described. Figure 20 A schematic diagram of the structure of an optical lens according to Embodiment 20 of this application is shown.

[0412] like Figure 20 As shown, the optical lens includes, in sequence 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.

[0413] The first lens L1 is a convex-concave lens with positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a concave-convex lens with negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 is a convex-concave lens with negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. The eighth lens L8 is a convex-concave lens with positive optical power, with its first side surface S15 being convex and its second side surface S16 being concave.

[0414] The optical lens may also include an aperture stop STO, which may be disposed between the third lens L3 and the fourth lens L4. For example, the aperture stop STO may be disposed on the first side surface S7 of the fourth lens L4.

[0415] Optionally, the optical lens may also include a filter L9 having a first side surface S17 and a second side surface S18 and / or a protective glass L10 having a first side surface S19 and a second side surface S20.

[0416] The optical lens provided in this application can be used, for example, as a vehicle-mounted lens or a LiDAR receiver lens, in which case... Figure 20 In the image plane, IMA represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging surface located on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens or a lidar transmitter lens. Figure 20 In the middle IMA, light from the light source surface passes through each surface S20 to S1 in sequence and is finally projected onto the first side, forming an image or illuminating an area on the first side.

[0417] Table 37 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 20. Table 38 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 20, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0418] Table 37

[0419]

[0420] Table 38

[0421] Face Number k A4 A6 A8 A10 A12 A14 A16 S15 0.1324 -4.7232E-05 1.4575E-06 -6.2106E-08 1.0595E-09 -6.1662E-12 0.0000E+00 0.0000E+00 S16 -0.0436 2.5682E-04 -1.6355E-06 2.6270E-07 -6.8014E-09 1.2485E-10 0.0000E+00 0.0000E+00

[0422] The optical lens of Example 20 has an MTF value exceeding 0.53 at a spatial frequency of 50 lp / mm (50 lines / mm); in terms of the dot plot RMS, the root mean square radius of the light spot on the image plane is 6.8 μm at the edge field of view; and in terms of diffraction ingress energy, the light spot energy accounts for more than 98.2% of the total light energy within a circle with a diameter of 15 μm on the image plane. The optical lens given in Example 20 has high resolution.

[0423] In summary, Examples 1 to 20 respectively satisfy the relationships shown in Tables 39-1 and 39-2 below. In Tables 39-1 and 39-2, ENPD, D, H, F, BFL, TTL, Dmax, F1~F8, D3, D8, D9, D10, D15, D16, SAG3, and The unit is millimeter (mm), the unit of FOV is degree (°), and the unit of θ is radian (rad).

[0424] Table 39-1

[0425]

[0426]

[0427] Table 39-2

[0428]

[0429]

[0430]

[0431] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device, such as a rangefinder camera, or an imaging module integrated into a rangefinder device. Furthermore, the electronic device may also be a stand-alone imaging device, such as an in-vehicle camera, or an imaging module integrated into a driver assistance system, such as a driving assistance system.

[0432] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens characterized in that, The optical lens comprises, along an optical axis from a first side to a second side, in order: a first lens with positive refractive power, a first side of which is convex, and a second side of which is concave; a second lens with negative refractive power, a first side of which is concave, and a second side of which is convex or concave; a third lens with negative refractive power, a first side of which is concave, and a second side of which is convex or concave; a fourth lens with positive refractive power, a first side of which is convex, and a second side of which is convex or concave; a fifth lens with positive refractive power, a first side of which is convex, and a second side of which is convex or concave; a sixth lens with negative refractive power, a first side of which is convex, and a second side of which is concave; a seventh lens with positive or negative refractive power, a first side of which is convex, and a second side of which is concave; and an eighth lens with positive or negative refractive power, a first side of which is convex, and a second side of which is concave.

2. The optical lens of claim 1, wherein, The optical lens satisfies at least one of the following: TTL / H / FOV≤0.3, D / H / FOV≤0.15, (F×θ) / D≤0.5, (FOV×F) / H≥50, FOV / F≤4, wherein TTL is a distance from a center of the first side of the first lens to an imaging surface of the optical lens on the optical axis, H is an image height corresponding to a maximum field angle of the optical lens, FOV is a maximum field angle of the optical lens, D is a maximum entrance pupil diameter of the optical lens corresponding to the maximum field angle of the optical lens, F is an effective focal length of the optical lens, and θ is a radian value corresponding to the maximum field angle of the optical lens.

3. The optical lens of claim 1, wherein, The optical lens satisfies at least one of the following: BFL / TTL≤0.15, F / ENPD≤1.2, 1.5≤F / H≤2, TTL / F≤5.5, 1≤F1 / F≤13, wherein BFL is a distance from a center of the second side of the eighth lens to the imaging surface of the optical lens on the optical axis, TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis, F is the effective focal length of the optical lens, ENPD is an entrance pupil diameter of the optical lens, H is the image height corresponding to the maximum field angle of the optical lens, and F1 is an effective focal length of the first lens.

4. The optical lens of claim 1, wherein, The optical lens satisfies: -3≤φ23 / φ<0, wherein φ23 is a combined refractive power of the second lens and the third lens, and φ is a refractive power of the optical lens.

5. The optical lens of claim 1, wherein, The optical lens satisfies at least one of the following: SAG3 / (D3 / 2)<0, 0.3≤|F / R3|+|F / R4|≤1.5, wherein SAG3 is an on-axis distance between an intersection of the first side of the second lens and the optical axis and an effective semi-radius vertex of the first side of the second lens, D3 is a maximum entrance pupil diameter of the second lens corresponding to the maximum field angle of the optical lens, F is the effective focal length of the optical lens, R3 is a curvature radius of the first side of the second lens, and R4 is a curvature radius of the second side of the second lens.

6. The optical lens of claim 1, wherein, The optical lens satisfies at least one of the following: -10≤F6 / (R11+R12)≤-3, (R11+R12) / TTL≤1, F6 / F≤-3.5, wherein F6 is an effective focal length of the sixth lens, R11 is a radius of curvature of a first side surface of the sixth lens, R12 is a radius of curvature of a second side surface of the sixth lens, TTL is a distance from a center of the first side surface of the first lens to an imaging plane of the optical lens on the optical axis, and F is an effective focal length of the optical lens.

7. The optical lens of claim 1, wherein, The optical lens satisfies: 2≥(φ45+φ56) / φ≥0.5, wherein φ45 is a combined optical power of the fourth lens and the fifth lens, φ56 is a combined optical power of the fifth lens and the sixth lens, and φ is an optical power of the optical lens.

8. The optical lens of claim 1, wherein, The optical lens satisfies at least one of the following: 0.5≥(R14+|R14|) / F / R13≥0.05, 0.5≤R13 / F≤2, 0.3≤R14 / F≤3, |R13 / F7|≤0.8, 0.2≤R13 / (d14+R14)≤1.1, wherein R13 is a radius of curvature of a first side surface of the seventh lens, R14 is a radius of curvature of a second side surface of the seventh lens, F is an effective focal length of the optical lens, F7 is an effective focal length of the seventh lens, and d14 is a center thickness of the seventh lens on the optical axis.

9. An optical lens characterized in that, The optical lens comprises, in order from a first side to a second side along the optical axis: a first lens having positive optical power; a second lens having negative optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having positive optical power; a sixth lens having negative optical power; a seventh lens having positive optical power or negative optical power; and an eighth lens having positive optical power or negative optical power. The optical lens satisfies: F6 / F≤-3.5, wherein F6 is an effective focal length of the sixth lens, and F is an effective focal length of the optical lens.

10. An electronic device, comprising: An imaging device for converting an optical image formed by the optical lens into an electrical signal. An imaging device for converting an optical image formed by the optical lens into an electrical signal.

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