Optical lens and electronic device

Abstract

An optical lens and an electronic device. The optical lens comprises, sequentially from a first side to a second side along an optical axis, at least seven lenses having refractive powers: a first lens (L1) having a negative refractive power, wherein a first side surface (S1) of the first lens is a convex surface, and a second side surface (S2) of the first lens is a concave surface; a second lens (L2) having a refractive power, wherein at least one side surface of the second lens is a concave surface; a third lens (L3) having a positive refractive power; a fourth lens (L4), wherein a first side surface (S7) of the fourth lens is a convex surface; a fifth lens (L5) and a sixth lens (L6) that have opposite refractive powers; and a seventh lens (L7) having a refractive power. The optical lens uses a seven-lens architecture, and achieves, by means of the rational settings of the refractive powers, surface profiles, etc. of the lenses, at least one of the beneficial effects including low sensitivity, high resolution, improved CRA, reduced ghosting, and miniaturization.

Description

Optical lenses and electronic devices

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Chinese patent applications No. 202411621913.5 and 202411621222.5, filed with the China National Intellectual Property Administration on November 13, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0004] Automotive cameras are key components for autonomous driving assistance systems to acquire external information. The market demands for the performance and structure of optical lenses used in vehicles, such as those for side-view, front-view, and surround-view cameras, are constantly increasing with the development of autonomous driving assistance system technology. For example:

[0005] 1) To acquire information more accurately, advanced driver assistance systems (ADAS) require larger, higher-resolution chips, thus placing increasingly higher demands on the resolving power of the lenses themselves. 2) To meet higher image quality requirements, structures with more lenses are often chosen, but this increases costs and severely impacts lens miniaturization. 3) While meeting the imaging requirements of automotive lenses, smaller lenses facilitate installation, but this creates a conflict between the resolving power of ordinary automotive lenses and miniaturization requirements. 4) The lens's CRA (Color Aspect Ratio) design also needs to match the chip. An excessively large CRA can cause severe color cast; therefore, the optical lens's CRA should be small to prevent stray light from hitting the lens barrel at the rear of the lens, while still ensuring good compatibility with the automotive chip and preventing color cast and vignetting. 5) For practicality, automotive lenses used in driver assistance systems should minimize ghosting stray light to avoid severe ghosting halos affecting the driver's judgment of the actual scene.

[0006] With the continuous development of automotive intelligence and autonomous driving technologies, the market for automotive cameras continues to grow. In the coming years, the number of automotive cameras will increase significantly to meet higher levels of autonomous driving functions and safety requirements. Among them, front-view and side-view cameras, as key components for realizing ADAS (Advanced Driving Assistance System) and autonomous driving functions, are in particularly strong market demand.

[0007] Because real-world road detection scenarios are complex, requiring lenses with excellent object recognition capabilities, high image quality is essential. Furthermore, to adapt to increasingly diverse application scenarios, high resolution has become a pressing need. While smaller lenses facilitate installation, this creates a conflict between high resolution and miniaturization in typical automotive lenses. Reducing the overall size of the lens also decreases the amount of light entering it, affecting illumination and resulting in darker images that fail to meet market demands. Additionally, automotive lenses used in driver assistance systems should minimize ghosting and stray light to prevent severe ghosting halos from impairing the driver's judgment of the actual scene.

[0008] However, existing optical lenses in related technologies struggle to meet these requirements. They suffer from numerous shortcomings in several aspects, necessitating improvement. For instance, current optical lenses often fail to simultaneously satisfy the demands for high resolution and miniaturization; they generally lack strong light transmission, failing to meet requirements in low-light environments such as nighttime; and regarding ghosting, existing optical lenses cannot yet meet the current need for weak ghosting. Therefore, possessing some or all of the performance characteristics such as high resolution, low sensitivity, weak ghosting, miniaturization, and high light throughput has become the main development direction for current automotive lenses. Summary of the Invention

[0009] According to the first design scheme of this application, an optical lens is proposed.

[0010] One aspect of the first design of this application provides an optical lens comprising, sequentially from a first side to a second side along the optical axis: a first lens having negative optical power, wherein a first side surface is convex and a second side surface is concave; a second lens having optical power, wherein at least one side surface is concave; a third lens having positive optical power; a fourth lens having positive optical power, wherein a first side surface is convex and a second side surface is convex; a fifth lens having negative optical power, wherein a first side surface is concave and a second side surface is concave; a sixth lens having positive optical power, wherein a first side surface is convex and a second side surface is convex; and a seventh lens having optical power.

[0011] In this optical lens, the fourth, fifth, and sixth lenses are cemented together, and the lens satisfies the following conditions: R1 / TTL≤0.55, 0.11≤d3 / TTL≤0.25, 2≤|F2 / F|, 3≤|F7 / F|, 2≤F456 / F≤20, where F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, F7 is the effective focal length of the seventh lens, F456 is the combined focal length of the fourth, fifth, and sixth lenses, d3 is the center thickness of the third lens, TTL is the total optical length of the optical lens, and R1 is the radius of curvature of the first side surface of the first lens. The optical lens provided by the embodiments of this application can achieve at least one of the following beneficial effects: low sensitivity, high resolution, small CRA (Cost Reduction Aspect Ratio), weak ghosting, and miniaturization.

[0012] In one embodiment, the second lens has positive or negative optical power, with a first concave side and a second convex side.

[0013] In one embodiment, the second lens has negative optical power, with its first side surface being concave or convex and its second side surface being concave.

[0014] In one embodiment, the first side surface of the third lens is convex, and the second side surface is either convex or concave, or the first side surface is concave and the second side surface is convex.

[0015] In one embodiment, the seventh lens has positive or negative optical power, with its first side being convex and its second side being concave, or the seventh lens has negative optical power, with its first side being concave and its second side being concave.

[0016] In one embodiment, the optical lens satisfies: F3 / F≤7, where F is the total effective focal length of the optical lens and F3 is the effective focal length of the third lens.

[0017] In one embodiment, the optical lens satisfies: FR1 / F≤5, where FR1 is the effective focal length of the first side of the first lens, and F is the total effective focal length of the optical lens.

[0018] In one embodiment, the optical lens satisfies: 0.01≤d23 / TTL≤0.25, where TTL is the total optical length of the optical lens and d23 is the distance between the second lens and the third lens along the optical axis.

[0019] In one embodiment, the optical lens satisfies: 1.2≤R1 / F≤3.5, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens.

[0020] In one embodiment, the optical lens satisfies: 4.5≤TTL / F≤9.5, where TTL is the total optical length of the optical lens and F is the total effective focal length of the optical lens.

[0021] In one embodiment, the optical lens satisfies: |(H-D14) / BFL|≤0.7, where H is the image height corresponding to the maximum field of view of the optical lens, D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens, and BFL is the optical back focal length of the optical lens.

[0022] In one embodiment, the optical lens satisfies: 45°≤(FOV×F) / H≤80°, where F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

[0023] In one embodiment, the optical lens satisfies: 1.3≤R1 / R2≤4, where R1 is the radius of curvature of the first side surface of the first lens and R2 is the radius of curvature of the second side surface of the first lens.

[0024] In one embodiment, the optical lens satisfies: D / H / FOVx1°≤0.025, 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.

[0025] In one embodiment, the optical lens satisfies: 1.5≤(F4+F5+F6) / F≤4, where F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens.

[0026] In one embodiment, the optical lens satisfies: |Sag31-Sag32| / d3≤0.4, where Sag31 is the sagitta of the first side of the third lens, Sag32 is the sagitta of the second side of the third lens, and d3 is the center thickness of the third lens.

[0027] In one embodiment, the optical lens satisfies: F3 / F456≤3, where F3 is the effective focal length of the third lens and F456 is the combined focal length of the fourth, fifth and sixth lenses.

[0028] In one embodiment, the optical lens satisfies: -3≤F1 / F≤-1, where F is the total effective focal length of the optical lens and F1 is the effective focal length of the first lens.

[0029] In one embodiment, the optical lens satisfies: 0.13≤d456 / TTL≤0.37, where d456 is the distance along the optical axis between the first side surface of the fourth lens and the second side surface of the sixth lens, and TTL is the total optical length of the optical lens.

[0030] In one embodiment, the optical lens satisfies: 0.1≤d air gap / TTL≤0.45, where d air gap is the sum of the air gaps between the first lens and the seventh lens, and TTL is the total optical length of the optical lens.

[0031] In one embodiment, the optical lens satisfies: -1.5≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.35, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F456 is the combined focal length of the fourth, fifth, and sixth lenses.

[0032] In one embodiment, the optical lens satisfies at least one of the following: 0.05≤BFL / TTL≤0.16, 0.4rad≤(F*θ) / D≤0.9rad, |F / R3|+|F / R4|≤2, F / ENPD≤2, d34 / TTL≤0.15, d67 / TTL≤0.02, where F is the total effective focal length of the optical lens, BEL is the optical back focal length of the optical lens, TTL is the total optical length of the optical lens, θ is the radian value corresponding to 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, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, ENPD is the entrance pupil diameter of the optical lens, d34 is the distance between the third and fourth lenses along the optical axis, and d67 is the distance between the sixth and seventh lenses along the optical axis.

[0033] In one embodiment, the optical lens satisfies at least one of the following: 0.12≤d3 / TTL≤0.2, 0.5≤F3 / F≤5.5, 0.1≤R1 / TTL≤0.45, 1.75≤FR1 / F≤3.5, 0.015≤d23 / TTL≤0.2, 0.07≤BFL / TTL≤0.11, 1.5≤R1 / F≤3.2, 6≤TTL / F≤8.5, 0.5rad≤(F*θ) / D≤0.8rad, 0.01≤|(H-D14) / BFL|≤0.5, 48°≤(FOV×F) / H≤72°, 1.6≤R1 / R2≤3.5, 0.009≤D / H / FOVx1°≤0.022, 1.8≤(F4+ F5+F6) / F≤3.2, 0.02≤|Sag31-Sag32| / d3≤0.25, 0.2≤|F / R3|+|F / R4|≤1.5, 1.75≤F / ENPD≤1.85, 0.05≤F3 / F456≤2.8, -2.8≤F1 / F≤-1.3, 2.5≤|F2 / F|≤140, 2.3≤F456 / F≤18, 3.5≤|F7 / F|≤125, 0.15≤d456 / TTL≤0.33, d34 / TTL≤0.1, 0.15≤dair gap / TTL≤0.37, -1.3≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.5, d67 / TTL≤0.016, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, FR1 is the effective focal length of the first side of the first lens, F456 is the combined focal length of the fourth, fifth, and sixth lenses, TTL is the total optical length of the optical lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, FOV is the maximum field of view of the optical lens, and D is the maximum field of view of the first side of the first lens corresponding to the maximum field of view of the optical lens. The maximum aperture is defined as follows: H is the image height corresponding to the maximum field of view of the optical lens; θ is the radian value corresponding to the maximum field of view of the optical lens; D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens; BFL is the optical back focal length of the optical lens; Sag31 is the sagitta of the first side of the third lens; Sag32 is the sagitta of the second side of the third lens; d3 is the center thickness of the third lens; ENPD is the entrance pupil diameter of the optical lens; d23 is the distance between the second and third lenses along the optical axis; d34 is the distance between the third and fourth lenses along the optical axis; d67 is the distance between the sixth and seventh lenses along the optical axis; d456 is the distance between the first side of the fourth lens and the second side of the sixth lens along the optical axis; and d air gap is the sum of the air gaps between the first and seventh lenses.

[0034] In one embodiment, the optical lens satisfies at least one of the following: 0.125 ≤ d3 / TTL ≤ 0.185, 1.931 ≤ F3 / F ≤ 4.946, 0.225 ≤ R1 / TTL ≤ 0.430, 2.166 ≤ FR1 / F ≤ 3.188, 0.021 ≤ d23 / TTL ≤ 0.164, 0.080 ≤ BFL / TTL ≤ 0.103, 1.776 ≤ R1 / F ≤ 2.9 05, 6.752≤TTL / F≤8.245, 0.597rad≤(F*θ) / D≤0.784rad, 0.028≤|(H-D14) / BFL|≤0.410, 52 .208≤(FOV×F) / H≤66.076, 2.065≤R1 / R2≤3.181, 0.011≤D / H / FOVx1°≤0.019, 2.215≤(F4+F5 +F6) / F≤2.999,0.058≤|Sag31-Sag32| / d3≤0.195,0.413≤|F / R3|+|F / R4|≤1.221,1.800≤F / ENPD≤1.800,0.146≤F3 / F456≤1.799,-2.629≤F1 / F≤-1.721,3.761≤|F2 / F|≤89.128,2.67 ≤F456 / F≤13.182, 5.805≤|F7 / F|≤80, 0.190≤d456 / TTL≤0.293, 0.003≤d34 / TTL≤0.087, 0.204≤dair gap / TTL≤0.335, -1.185≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.682, 0.003≤d67 / TTL≤0.012, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, FR1 is the effective focal length of the first side of the first lens, F456 is the combined focal length of the fourth, fifth, and sixth lenses, TTL is the total optical length of the optical lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, FOV is the maximum field of view of the optical lens, and D is the maximum field of view of the first side of the first lens corresponding to the maximum field of view of the optical lens. The maximum aperture is defined as follows: H is the image height corresponding to the maximum field of view of the optical lens; θ is the radian value corresponding to the maximum field of view of the optical lens; D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens; BFL is the optical back focal length of the optical lens; Sag31 is the sagitta of the first side of the third lens; Sag32 is the sagitta of the second side of the third lens; d3 is the center thickness of the third lens; ENPD is the entrance pupil diameter of the optical lens; d23 is the distance between the second and third lenses along the optical axis; d34 is the distance between the third and fourth lenses along the optical axis; d67 is the distance between the sixth and seventh lenses along the optical axis; d456 is the distance between the first side of the fourth lens and the second side of the sixth lens along the optical axis; and d air gap is the sum of the air gaps between the first and seventh lenses.

[0035] Another aspect of the first design of this application provides an electronic device, including an optical lens of any of the above embodiments, and including an imaging element for converting an optical image formed by the optical lens into an electrical signal, or including a light source.

[0036] According to the second design scheme of this application, an optical lens is proposed.

[0037] The second design of this application provides an optical lens that, along the optical axis from the first side to the second side, may sequentially include: a first lens with negative optical power, the first side of which is convex and the second side of which is concave; a second lens with negative optical power, the first side of which is concave; a third lens with positive optical power; a fourth lens with optical power, the first side of which is convex; a fifth lens with optical power; a sixth lens with optical power; and a seventh lens with optical power.

[0038] The fifth and sixth lenses are cemented together, and they have opposite optical power properties. The optical lens contains seven lenses with optical power. The optical lens satisfies the following conditions: 0.03≤(d5+d6) / TTL≤0.2; 2≤|F7 / F|; -5≤R4 / R5≤0.8; -25≤F2 / F≤-2; 0.06≤d45 / TTL≤0.2; and TTL / F≤4.5. Here, d5 is the center thickness of the fifth lens on the optical axis, d6 is the center thickness of the sixth lens on the optical axis, TTL is the distance from the center of the first side of the first lens to the imaging plane of the optical lens on the optical axis, F7 is the effective focal length of the seventh lens, F is the total effective focal length of the optical lens, R4 is the radius of curvature of the second side of the second lens, R5 is the radius of curvature of the first side of the third lens, F2 is the effective focal length of the second lens, and d45 is the air gap between the fourth and fifth lenses on the optical axis.

[0039] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 1.5≤F3 / F≤8.

[0040] In one embodiment, the distance BFL from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface on the optical axis can satisfy: BFL / TTL≤0.15.

[0041] In one embodiment, the air gap d67 between the sixth and seventh lenses on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: 0.05≤d67 / TTL≤0.2.

[0042] In one embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens can satisfy: |(HF×θ) / (F×θ)|≤0.1.

[0043] In one embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens can satisfy: -0.5≤R3 / R4≤2.

[0044] In one embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens can satisfy: 50 ≤ (FOV × F) / H ≤ 75.

[0045] In one embodiment, the maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens can satisfy: 0.1≤D / H / F≤0.25.

[0046] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: -2.8≤F1 / F≤-1.

[0047] In one embodiment, the total effective focal length F of the optical lens and the effective focal length F4 of the fourth lens can satisfy: -1≤F / F4≤1.5.

[0048] In one embodiment, the center thickness d2 of the second lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: 0.005≤d2 / TTL≤0.12.

[0049] In one embodiment, the air gap d23 between the second lens and the third lens on the optical axis, the air gap d34 between the third lens and the fourth lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: (d23+d34) / TTL≤0.1.

[0050] In one embodiment, the air gap d23 between the second and third lenses on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: d23 / TTL≤0.08.

[0051] In one embodiment, the air gap d34 between the third and fourth lenses on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: d34 / TTL≤0.01.

[0052] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens can satisfy: 0.7≤F / H≤0.95.

[0053] In one embodiment, the radius of curvature R7 of the first side of the fourth lens and the total effective focal length F of the optical lens can satisfy: 0.5≤R7 / F≤2.5.

[0054] In one embodiment, the optical lens may satisfy at least one of the following conditions: -3≤R11 / F≤1.5; -8≤F5 / F6≤-0.1; (R1 / D) / (R2 / D2)≤9; F / ENPD≤2; 1.8≤R1 / F≤8.5; -10≤R6 / R7≤25; 0.5≤F56 / F≤30; where R11 is the radius of curvature of the second side of the fifth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side of the third lens, F56 is the combined focal length of the fifth and sixth lenses, and the meanings of the other parameters are the same as above.

[0055] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.09≤(d5+d6) / TTL≤0.16; 2≤|F7 / F|≤80; 2.2≤|F7 / F|≤55; -4≤R4 / R5≤0.6; -20≤F2 / F≤-2.5; 0.07≤d45 / TTL≤0.18; 3.5≤TTL / F≤4.3; 1.7≤F3 / F≤6.5; 0.08≤BFL / TTL≤0.13; 0.06≤d67 / TTL≤0.15; 0.002≤|(HF×θ) / (F×θ)|≤0.08; -0.3≤R3 / R4≤1.2; 55≤(FOV×F) / H≤65; 0.1 2≤D / H / F≤0.19; -2.2≤F1 / F≤-1.2; -0.5≤F / F4≤1; 0.01≤d2 / TTL≤0.09; (d23+d34) / TTL≤0.06; d23 / TTL≤0.06; d34 / TTL≤0.005; 0.75≤F / H≤0.9; 0.7≤R7 / F≤1.8; -2≤R11 / F≤1; -6≤F5 / F6≤-0.2; 1.25≤(R1 / D) / (R2 / D2)≤7.75; 1.7≤F / ENPD≤1.9; 2≤R1 / F≤8; -7≤R6 / R7≤-0.5; 0.7≤F56 / F≤24; where the meaning of each parameter is the same as above.

[0056] In one embodiment, the optical lens may satisfy at least one of the following conditions: 0.1081≤(d5+d6) / TTL≤0.1505; 2.6553≤|F7 / F|≤34.7521; -2.7008≤R4 / R5≤0.3174; -14.9343≤F2 / F≤-3.0069; 0.0806≤d45 / TTL≤0.1501; 3.8753≤TTL / F≤4.1300; 1.89 48≤F3 / F≤4.9664; 0.0920≤BFL / TTL≤0.1209; 0.0710≤d67 / TTL≤0.1247; 0.0039≤|(HF×θ) / (F×θ)|≤0 .0558; -0.0605≤R3 / R4≤0.8217; 57.0731≤(FOV×F) / H≤60.6826; 0.1434≤D / H / F≤0.1808; -1.9572≤F1 / F≤-1.3275;-0.1922≤F / F4≤0.7230;0.0250≤d2 / TTL≤0.0759;0.0065≤(d23+d34) / TTL≤0.0428;0.0032≤d23 / TTL≤0.0397;0.0031≤d34 / TTL≤0.0032;0.8142≤F / H≤0.8657;0.9915≤R7 / F≤1.6721;-1。 5128≤R11 / F≤0.6900;-3.7543≤F5 / F6≤-0.2725;2.5211≤(R1 / D) / (R2 / D2)≤6.4461;1.8000≤F / ENPD≤1.8200;2.2309≤R1 / F≤5.8821;-5.5184≤R6 / R7≤17.6805;0.9904≤F56 / F≤19.2509;The meanings of each parameter are the same as above.

[0057] Another aspect of the second design of this application provides an electronic device comprising an optical lens according to this application and an imaging element for converting the optical image or optical information formed by the optical lens into an electrical signal. The imaging element is located on a second side of the optical lens, and light from the first side is imaged on the second side after passing through the optical lens. Alternatively, the electronic device comprises an optical lens according to this application and a light source, the light source being located on the second side of the optical lens, and light emitted from the light source being projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side.

[0058] An exemplary embodiment of the second design scheme of this application includes an optical lens comprising seven lenses with optical power, namely, lenses numbered one to seven arranged sequentially from the first side to the second side along the optical axis. The first lens has negative optical power, its first side surface is convex, and its second side surface is concave; the second lens has negative optical power, and its first side surface is concave; the third lens has positive optical power; the first side surface of the fourth lens is convex; the fifth lens and the sixth lens are cemented together, and the fifth and sixth lenses have opposite optical power properties; furthermore, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the center of the first side surface of the first lens are all perpendicular to the optical lens. The distance TTL between the imaging plane of the head on the optical axis satisfies the condition 0.03≤(d5+d6) / TTL≤0.2; the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy the condition 2≤|F7 / F|; the radius of curvature R4 of the second side of the second lens and the radius of curvature R5 of the first side of the third lens satisfy the condition -5≤R4 / R5≤0.8; the effective focal length F2 of the second lens and F satisfy the condition -25≤F2 / F≤-2; the air gap d45 between the fourth and fifth lenses on the optical axis and TTL satisfy the condition 0.06≤d45 / TTL≤0.2; TTL and F satisfy the condition TTL / F≤4.5. By appropriately increasing the thickness of the cemented lens elements within a certain range, this lens configuration enhances light control and improves image quality. A well-controlled seventh lens with a relatively large focal length results in less light deflection, allowing it to be closer to the image plane, achieving a smaller back focal length and a larger image plane. This also helps to increase the distance from the sixth lens, improving system sensitivity and image quality. Furthermore, carefully managing the ratio of the curvature radius of the second side of the second lens to that of the first side of the third lens continuously diffuses light rays passing through the first and second lenses, increasing the incident height of edge rays, reducing distortion, and improving resolution. Finally, a well-controlled second lens with a relatively large focal length effectively receives rapidly diverging light rays from the front, further dispersing the light. The optical system is designed to be integrated into the rear optical system without excessive divergence affecting the rear aperture, while simultaneously reducing system sensitivity and improving image quality. Light rays begin to converge after passing through the third lens and continue converging after exiting through the fourth lens. The relatively large distance between the fourth and fifth lenses facilitates effective light convergence, reducing the rear aperture. Simultaneously, the light rays smoothly transition to the fifth lens, minimizing aberrations caused by the continuous convergence of the third and fourth lenses, thus improving image quality. Furthermore, a well-designed distance between the fourth and fifth lenses allows for adjustments to the rear focal length, solving assembly issues while maintaining miniaturization and achieving high resolution. Moreover, the length of the optical lens in this application can be effectively limited, allowing for miniaturization while maintaining a telephoto lens.

[0059] The optical lens according to the exemplary embodiments of this application adopts a seven-element lens architecture. By reasonably setting parameters such as lens power, surface shape, radius of curvature, center thickness and air gap between lenses, the optical lens can have one or more beneficial effects such as high resolution, low sensitivity, weak ghosting, miniaturization and high light throughput, so that the optical lens can better meet the high requirements of applications such as automotive. Attached Figure Description

[0060] Other features, objects, and advantages of this application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0061] Figures 1 to 21 respectively show schematic diagrams of the optical lenses according to Embodiments 1 to 21 of this application; and

[0062] Figure 22 shows a schematic diagram of the MTF curves of the optical lenses in Embodiments 1 to 21 provided in this application;

[0063] Figure 23 is a schematic diagram showing the structure of an optical lens according to Embodiment 22 of this application;

[0064] Figure 24 is a schematic diagram showing the structure of an optical lens according to Embodiment 23 of this application;

[0065] Figure 25 is a schematic diagram showing the structure of an optical lens according to Embodiment 24 of this application;

[0066] Figure 26 is a schematic diagram showing the structure of an optical lens according to Embodiment 25 of this application;

[0067] Figure 27 is a schematic diagram showing the structure of an optical lens according to Embodiment 26 of this application;

[0068] Figure 28 is a schematic diagram showing the structure of an optical lens according to Embodiment 27 of this application;

[0069] Figure 29 is a schematic diagram showing the structure of an optical lens according to Embodiment 28 of this application;

[0070] Figure 30 is a schematic diagram showing the structure of an optical lens according to Embodiment 29 of this application;

[0071] Figure 31 is a schematic diagram showing the structure of an optical lens according to Embodiment 30 of this application;

[0072] Figure 32 is a schematic diagram showing the structure of an optical lens according to Embodiment 31 of this application;

[0073] Figure 33 is a schematic diagram showing the structure of an optical lens according to Embodiment 32 of this application;

[0074] Figure 34 is a schematic diagram showing the structure of an optical lens according to Embodiment 33 of this application;

[0075] Figure 35 is a schematic diagram showing the structure of an optical lens according to Embodiment 34 of this application;

[0076] Figure 36 is an MTF diagram showing the optical lens according to Embodiment 22 of this application. Detailed Implementation

[0077] 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.

[0078] 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.

[0079] 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.

[0080] In this article, 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, the surface of an optical lens closest to the second side is called the second side surface of the optical lens, or the surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging side is called the image side surface of the lens.

[0081] 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 radar transmitting lens, in the first design scheme of this document, "first side" can refer to the imaging side, and "second side" can refer to the image source side. In the second design scheme of this document, "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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] The features, principles and other aspects of the first design scheme of this application are described in detail below.

[0086] In an exemplary embodiment, the optical lens includes, for example, seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses are arranged sequentially along the optical axis from the first side to the second side.

[0087] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as an automotive 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 rays from the object side can form an image on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0088] 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 second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is the image source surface of the optical lens.

[0089] 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).

[0090] In an exemplary embodiment, the first lens may have negative optical power, with its first side surface being convex and its second side surface being concave. The negative optical power of the first lens allows light rays exiting the lens to have a larger light-receiving surface for the rear optical system under a given field of view. The convex first side surface facilitates the collection of light over a wide area, increasing the overall light transmission and illumination of the optical lens while preventing dust accumulation issues during practical use. The concave second side surface of the first lens rapidly diverges large-angle light rays passing through the first side surface, maximizing the collection of light rays into the rear optical system and contributing to a large field of view. In an exemplary embodiment, the first lens may be made of a high-refractive-index material, which facilitates the convergence of front-end light and reduces the front aperture.

[0091] In an exemplary embodiment, the second lens may have a negative optical power, which can receive light from the first lens and gently diffuse the light into the rear optical system, thus helping to increase the light transmission. In an exemplary embodiment, the first side of the second lens may be concave, and the second side may be convex. The concave first side of the second lens can better receive the light emitted from the first lens, resulting in less deflection and reduced sensitivity. It can also receive the light emitted from the first lens with a smaller aperture and further diffuse the upward-diverging light, thus further increasing the peripheral light transmission. The convex second side of the second lens can converge the upward-diverging light transmitted from the front system, reducing the aperture of the rear optical system and contributing to miniaturization. In an exemplary embodiment, the first side of the second lens may be concave, and the second side may be concave. The concave first side of the second lens can better receive the light emitted from the first lens, resulting in less deflection and reduced sensitivity. It can also receive the light emitted from the first lens with a smaller aperture and further diffuse the upward-diverging light, thus further increasing the peripheral light transmission. The second side of the second lens is concave, which further diverges the light rays passing through the first side of the second lens, resulting in a higher imaging position for the light rays reaching the aperture stop, thus contributing to a small FNO (field-of-flight) resolution. In an exemplary embodiment, the first side of the second lens can be convex, and the second side can be concave. A convex first side of the second lens allows for some control over the diverging and upward-pointing light rays transmitted from the front system, reducing the aperture of the rear optical system and aiding in the miniaturization of the optical lens. A concave second side of the second lens diverges the converged light rays passing through the first side of the second lens, resulting in a higher imaging position for the rear light rays, which also contributes to a small FNO.

[0092] In an exemplary embodiment, an aperture stop may be provided between the second lens and the third lens to limit the light beam, which helps to effectively converge the light entering the optical lens, thereby reducing the front aperture of the optical lens and reducing the assembly sensitivity of the optical lens. However, it should be noted that the position of the aperture stop disclosed herein is merely an example and not a limitation; in alternative embodiments, the aperture stop may be placed in other positions as needed.

[0093] In an exemplary embodiment, the second lens may have positive optical power, with its first side surface being concave and its second side surface being convex. Having positive optical power in the second lens allows it to converge and gather light rays that tend to diverge after passing through the first lens, helping to reduce the aperture of the rear optical system. The concave first side surface of the second lens better receives light rays emitted from the first lens, resulting in less deflection and reduced sensitivity. It also allows for receiving light rays emitted from the first lens with a smaller aperture, further diverging the upward-spreading light rays and increasing peripheral light transmission. The convex second side surface of the second lens can converge the upward-spreading light rays transmitted from the front optical system, reducing the aperture of the rear optical system and contributing to the miniaturization of the optical lens.

[0094] In an exemplary embodiment, the third lens may have positive optical power. Positive optical power in the third lens further converges the light rays passing through the second lens, reducing the height of peripheral light rays, which facilitates a reduction in the aperture of the rear lens. In an exemplary embodiment, both the first and second sides of the third lens may be convex. A convex first side of the third lens effectively converges light rays, smooths the light path, reduces system sensitivity, and also reduces the rear aperture, contributing to miniaturization. In an exemplary embodiment, the shape of the first side of the fourth lens may differ significantly from the shape of the second side of the third lens. A convex second side of the third lens further alters the light path, compressing the aperture of the rear optical system and aiding in the miniaturization of the optical lens. In an exemplary embodiment, the first side of the third lens may be convex, and the second side may be concave. A convex first side of the third lens quickly converges the divergent and upward-pointing light rays transmitted from the front system, reducing not only the overall length of the optical system but also the aperture of the rear optical system, contributing to the miniaturization of the optical lens. The second side of the third lens is concave, which slightly diverges the light rays converged by the first side of the third lens, allowing more peripheral light rays to reach the imaging surface and improving the relative illumination of the periphery. In an exemplary embodiment, the first side of the third lens can be concave, and the second side can be convex. The concave first side of the third lens further deflects the diverging light rays from the front upwards, achieving a higher imaging height. The convex second side of the third lens deflects the diverging light rays from the first side of the third lens towards the optical axis, allowing the light to smoothly transition to the subsequent optical system.

[0095] In an exemplary embodiment, the fourth, fifth, and sixth lenses can be cemented together to form a composite. Because light rays diverge continuously after passing through the first and second lenses and then converge through the third lens, a significant optical path difference is introduced, making it difficult to completely eliminate chromatic aberration in the optical lens. In this case, a reasonable combination of the optical power and surface shape of the third lens with the second lens (e.g., having the optical power and surface shape described in the above embodiment) allows light rays to enter the fourth lens more smoothly when exiting the third lens. Furthermore, cementing the fourth, fifth, and sixth lenses together to form a composite is more beneficial for correcting chromatic aberration, ensuring that various aberrations of the optical system are fully corrected. It also allows for improved resolution and optimized optical performance such as distortion and CRA while maintaining a compact structure. Furthermore, the cemented composite formed by the fourth, fifth, and sixth lenses also has the following effects: achromaticity. Because different wavelengths of light have different refractive indices in the same material, different wavelengths of light are focused at different positions after passing through the lens, causing blurring and distortion in the image. By cementing the fourth, fifth, and sixth lenses together to form a composite, a single optical element can be formed by combining materials with high and low refractive indices and different dispersion coefficients. This eliminates air gaps between the lenses, reduces reflection and scattering losses caused by different medium interfaces, and can also correct for different wavelengths of light, balance optical path differences, and focus them at the same focal point. The cemented assembly formed by bonding four, a fifth, and a sixth lens as described in the embodiments of this application achieves better chromatic aberration elimination compared to an assembly formed by bonding two lenses. Specifically, it eliminates not only primary chromatic aberration but also secondary spectral aberration, achieving apochromatic aberration and significantly improving the image sharpness of the optical lens. It also reduces the spacing between lenses along the optical axis (e.g., air gap), thereby reducing the overall optical length of the optical lens. Furthermore, it reduces the number of assembly components between lenses, simplifying manufacturing processes, making quality control easier, and lowering the scrap rate. The effective focal length values ​​among the three lenses can be rationally allocated, facilitating thermal compensation and enabling the optical lens to achieve excellent temperature performance. Finally, the cemented lens assembly allows the use of high-refractive-index materials without total internal reflection at the interface, expanding the material optimization solution space and further enhancing the performance of the optical lens.

[0096] In an exemplary embodiment, the cemented joint formed by the fourth, fifth, and sixth lenses can have a "positive-negative-positive" optical power combination; that is, the fourth lens can have a positive optical power, the fifth lens can have a negative optical power, and the sixth lens can have a positive optical power. The fourth lens, having a positive optical power, can converge diverging light rays. By properly combining it with the fifth and sixth lenses, it can significantly reduce spherical aberration and chromatic aberration of the optical system, improving resolution. In this embodiment, the first and second sides of the fourth lens can be convex to further reduce spherical aberration and chromatic aberration, thus improving resolution. The fifth lens, having a negative optical power, can appropriately adjust the divergence of the light rays converged by the fourth lens. By properly combining it with the sixth lens, it can effectively correct various aberrations caused by lenses with positive optical power (such as the third lens), achieving improved image quality, distortion optimization, and CRA (Corrective Aberration Reduction). In this embodiment, the first and second sides of the fifth lens can be concave to further improve image quality, distortion optimization, and CRA. The sixth lens has positive optical power and can converge light. By properly combining it with the fifth lens of the fourth lens, it can further converge and adjust the light in front, so that after the light passes through the cemented component, it can balance and correct the chromatic aberration and spherical aberration of the optical lens, enabling the optical lens to achieve good imaging results. In this embodiment, the first side surface of the sixth lens can be convex, and the second side surface can be convex, to further balance and correct the chromatic aberration and spherical aberration of the optical lens.

[0097] In an exemplary embodiment, at least one of the first to seventh lenses can be a spherical lens or an aspherical lens. In an exemplary embodiment, the seventh lens can be an aspherical lens. 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. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving the lens's image quality. The use of aspherical lenses helps correct system aberrations and improves resolving power.

[0098] In an exemplary embodiment, the seventh lens may have negative optical power. Having negative optical power allows for further divergence adjustment of light rays passing through the front optical system, increasing the illumination of the peripheral field of view and improving resolution. In an exemplary embodiment, the seventh lens may be an aspherical lens to smoothly transition light rays passing through the cemented component to the second side surface of the seventh lens, thereby correcting astigmatism and field curvature and improving the resolving power of the optical lens. In an exemplary embodiment, the first side surface of the seventh lens may be convex, and the second side surface may be concave. The convex first side surface of the seventh lens can converge the incident light rays transmitted from the front optical system, allowing them to quickly reach the imaging plane, contributing to a shorter overall optical length for the optical system. The concave second side surface of the seventh lens can diverge the central light rays, allowing them to reach a higher imaging position, while also converging peripheral, backward-curved light rays, reducing the angle of incidence of light entering the chip, thus helping to improve illumination and reduce chromatic aberration. In an exemplary embodiment, the first side surface of the seventh lens may be concave, and the second side surface may be concave. The seventh lens is an aspherical lens with a concave first side, which can appropriately diverge light rays and smooth the light path emitted from several consecutive convex surfaces (such as the sixth lens with convex first and second sides), thus improving resolution. The second concave second side of the seventh lens can further diverge the central light rays, allowing the light to reach a higher imaging position. At the same time, it can converge the peripheral reverse-bent light rays, reducing the angle of incidence of light entering the chip, which helps to improve illumination and reduce chromatic aberration.

[0099] In an exemplary embodiment, the seventh 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 seventh lens allows for further convergence adjustment of the forward light rays and reduces the distance between the light rays and the imaging surface, thereby achieving miniaturization of the optical lens, reducing light loss, and improving image quality. In an exemplary embodiment, the seventh lens may be an aspherical lens to smoothly transition the light rays passing through the cemented component to the imaging surface, thereby correcting astigmatism and field curvature and improving the resolving power of the optical lens. The convex first side surface of the seventh lens can converge the incident light rays transmitted from the forward optical system, enabling the light rays to quickly reach the imaging surface, contributing to a shorter overall optical length of the optical lens. The concave second side surface of the seventh lens can further diverge the central light rays, allowing the light rays to reach a higher imaging position, while also converging the peripheral reverse-bent light rays, reducing the angle of incidence of the light rays entering the chip, which helps to improve illumination and reduce chromatic aberration.

[0100] Figure 1 shows a schematic diagram of the structure of an optical lens according to an embodiment of this application. The optical lens provided by this application can be used, for example, as an automotive lens. In this case, IMA in Figure 1 represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface disposed on the second side. An image sensing chip is disposed at the imaging surface. It should be understood that the optical lens provided by this application can also be used, for example, as a projection lens or a lidar transmitter lens. In this case, IMA in Figure 1 represents the image source surface. Light from the image source surface passes sequentially through surfaces S16 to S1 and is finally projected onto the projection surface (not shown) disposed on the first side.

[0101] In an exemplary embodiment, the optical lens can satisfy: 0.11 ≤ d3 / TTL ≤ 0.25, where d3 is the center thickness of the third lens and TTL is the total optical length of the optical lens. In this exemplary embodiment, the third lens can have positive optical power to converge light. Due to the significant light refraction, by satisfying the above condition and appropriately increasing the center thickness of the third lens (center thickness being the distance along the optical axis from the center of the first side to the center of the second side of the lens), the optical path can be increased, thereby effectively converging divergent light rays incident from the front, smoothing the light path, and reducing the sensitivity of the optical lens. Preferably, the optical lens can further satisfy: 0.12 ≤ d3 / TTL ≤ 0.2, which is more conducive to achieving both low sensitivity and miniaturization and high resolution in the optical lens. More preferably, the optical lens can further satisfy: 0.125 ≤ d3 / TTL ≤ 0.185, which is more conducive to achieving both low sensitivity and miniaturization and high resolution in the optical lens.

[0102] In an exemplary embodiment, the optical lens can satisfy the condition: F3 / F≤7, where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens. By ensuring the optical lens satisfies the above condition, the effective focal length of the third lens is kept relatively small. This allows for the effective convergence of light rays that tend to diverge after passing through the front optical system, enabling more light to enter the rear optical system. This improves image quality and light transmission, while also facilitating miniaturization of the rear end. Preferably, the optical lens can further satisfy: 0.5≤F3 / F≤5.5, which is more conducive to achieving high resolution and a small aperture. More preferably, the optical lens can further satisfy: 1.931≤F3 / F≤4.946, which is even more conducive to achieving high resolution and a small aperture. In the exemplary embodiment, simultaneously satisfying the conditions F3 / F≤7 (or 0.5≤F3 / F≤5.5, 1.931≤F3 / F≤4.946) and 0.11≤d3 / TTL≤0.25 (or 0.12≤d3 / TTL≤0.2, 0.125≤d3 / TTL≤0.185) is beneficial for reducing the sensitivity of the optical lens and improving image quality.

[0103] In an exemplary embodiment, the optical lens can satisfy: R1 / TTL≤0.55, where R1 is the radius of curvature of the first side surface of the first lens, and TTL is the total optical length of the optical lens. By making the optical lens satisfy the above condition and controlling the radius of curvature of the first side surface of the first lens, the pupil image of the ghost image can be moved away from the focal plane, so that the ghost image light rays incident on the imaging plane eventually diverge relatively, thereby effectively reducing the relative energy value of the ghost image and improving the image quality of the optical lens. Preferably, the optical lens can further satisfy: 0.1≤R1 / TTL≤0.45, which is more conducive to achieving weak ghosting in the optical lens. More preferably, the optical lens can further satisfy: 0.225≤R1 / TTL≤0.430, which is more conducive to achieving weak ghosting in the optical lens.

[0104] In an exemplary embodiment, the optical lens can satisfy: FR1 / F≤5, where FR1 is the effective focal length of the first side of the first lens, and F is the total effective focal length of the optical lens. By making the optical lens satisfy the above condition, the ratio of the effective focal length of the first side of the first lens to the total effective focal length is controlled to be small, which makes the first side of the first lens have a stronger ability to deflect light, which is beneficial to reduce light reflection from its relatively flat surface, thereby reducing the risk of it forming a ghost image with the protective glass of the chip. Preferably, the optical lens can further satisfy: 1.75≤FR1 / F≤3.5, which is more conducive to achieving weak ghosting of the optical lens. More preferably, the optical lens can further satisfy: 2.166≤FR1 / F≤3.188, which is more conducive to achieving weak ghosting of the optical lens.

[0105] In an exemplary embodiment, the optical lens can satisfy the condition: 0.01 ≤ d23 / TTL ≤ 0.25, where d23 is the distance between the second and third lenses along the optical axis, and TTL is the total optical length of the optical lens. By satisfying the above condition, the ratio of the distance between the second and third lenses along the optical axis to the total optical length of the optical lens can be controlled, allowing the upward-trending light rays emitted through the first and second lenses to be transmitted over a longer distance, enabling peripheral light rays to reach a higher imaging position, improving the overall illumination of the optical lens, while also achieving miniaturization. Preferably, the optical lens can further satisfy: 0.015 ≤ d23 / TTL ≤ 0.2, which is more conducive to achieving high resolution and high light transmittance of the optical lens. More preferably, the optical lens can further satisfy: 0.021 ≤ d23 / TTL ≤ 0.164, which is more conducive to achieving high resolution and high light transmittance of the optical lens.

[0106] In an exemplary embodiment, the optical lens can satisfy the following condition: 0.05 ≤ BFL / TTL ≤ 0.16, where BFL is the optical back focal length and TTL is the optical total length. By making the optical lens satisfy the above condition, the ratio of the optical back focal length to the optical total length is controlled, allowing the entire optical lens to be more compact and miniaturized while meeting assembly requirements. Preferably, the optical lens can further satisfy the following condition: 0.07 ≤ BFL / TTL ≤ 0.11, which is more conducive to miniaturization. More preferably, the optical lens can further satisfy the following condition: 0.080 ≤ BFL / TTL ≤ 0.103, which is more conducive to achieving both miniaturization and high resolution.

[0107] In an exemplary embodiment, the optical lens can satisfy the condition: 1.2 ≤ R1 / F ≤ 3.5, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens. In an exemplary embodiment, the first side surface of the first lens can be convex. By making the optical lens satisfy the above condition, the size of the radius of curvature of the first side surface of the first lens can be reasonably controlled, which is beneficial for collecting large-angle light rays into the lens and achieving a large field of view. Preferably, the optical lens can further satisfy: 1.5 ≤ R1 / F ≤ 3.2, which is more conducive to achieving a large field of view while maintaining high resolution. More preferably, the optical lens can further satisfy: 1.776 ≤ R1 / F ≤ 2.905, which is more conducive to achieving a large field of view while maintaining high resolution.

[0108] In an exemplary embodiment, the optical lens can satisfy the condition: 4.5 ≤ TTL / F ≤ 9.5, where TTL is the total optical length of the optical lens and F is the total effective focal length of the optical lens. By making the optical lens satisfy the above condition, the ratio of the total optical length to the total effective focal length of the optical lens is controlled within this range, thereby achieving miniaturization of the optical lens. Preferably, the optical lens can further satisfy: 6 ≤ TTL / F ≤ 8.5, which is more conducive to achieving both miniaturization and high resolution. More preferably, the optical lens can further satisfy: 6.752 ≤ TTL / F ≤ 8.245, which is more conducive to achieving both miniaturization and high resolution.

[0109] In an exemplary embodiment, the optical lens can satisfy: 0.4rad ≤ (F*θ) / D ≤ 0.9rad, where F is the total 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. By making the optical lens satisfy the above condition, controlling the effective focal length, the radian value of the maximum field of view, and the maximum aperture of the first side of the first lens corresponding to the maximum field of view, the optical lens can achieve a large field of view while having a small front aperture, thereby reducing the size of the imaging system. Preferably, the optical lens can further satisfy: 0.5rad ≤ (F*θ) / D ≤ 0.8rad, which is more conducive to achieving a small aperture while maintaining high resolution. More preferably, the optical lens can further satisfy: 0.597rad ≤ (F*θ) / D ≤ 0.784rad, which is more conducive to achieving a small aperture while maintaining high resolution.

[0110] In an exemplary embodiment, the optical lens can satisfy: |(H-D14) / BFL|≤0.7, where H is the image height corresponding to the maximum field of view of the optical lens, D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens, and BFL is the optical back focal length of the optical lens. By making the optical lens satisfy the above condition, the maximum aperture of the second side of the last lens (e.g., the seventh lens) corresponding to the maximum field of view of the optical lens is close to the image height, which can reduce light deflection and facilitate the achievement of a small CRA. Preferably, the optical lens can further satisfy: 0.01≤|(H-D14) / BFL|≤0.5, which is more conducive to achieving both a small CRA and high resolution. More preferably, the optical lens can further satisfy: 0.028≤|(H-D14) / BFL|≤0.410, which is more conducive to achieving both a small CRA and high resolution.

[0111] In an exemplary embodiment, the optical lens can satisfy the following condition: 45° ≤ (FOV × F) / H ≤ 80°, where F is the total effective focal length of the optical lens, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By making the optical lens satisfy the above condition, controlling the maximum field of view, the image height corresponding to the maximum field of view, and the total effective focal length of the optical lens, the optical lens can simultaneously satisfy the requirements of telephoto and a large field of view, as well as a large angular resolution in the central region. Preferably, the optical lens can further satisfy: 48° ≤ (FOV × F) / H ≤ 72°, which is more conducive to achieving a large field of view while maintaining high resolution. More preferably, the optical lens can further satisfy: 52.208 ≤ (FOV × F) / H ≤ 66.076, which is more conducive to achieving a large field of view of the optical lens.

[0112] In an exemplary embodiment, the optical lens can satisfy the condition: 1.3 ≤ R1 / R2 ≤ 4, where R1 is the radius of curvature of the first side surface of the first lens, and R2 is the radius of curvature of the second side surface of the first lens. By satisfying the above condition, the radius of curvature of the first and second side surfaces of the first lens is controlled, which is beneficial for collecting light rays with a large field of view into the optical lens to achieve large-angle imaging. The second side surface has a larger curvature, which is beneficial for deflecting the edge light rays more significantly, thereby making the edge light rays diverge, which is beneficial for achieving a large field of view and reducing the front aperture. Preferably, the optical lens can further satisfy the condition: 1.6 ≤ R1 / R2 ≤ 3.5, which is more conducive to achieving a small aperture, a large field of view, and high resolution in the optical lens. More preferably, the optical lens can further satisfy the condition: 2.065 ≤ R1 / R2 ≤ 3.181, which is more conducive to achieving a small aperture, a large field of view, and high resolution in the optical lens.

[0113] In an exemplary embodiment, the optical lens can satisfy the condition: D / H / FOVx1°≤0.025, 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. By satisfying the above condition, it is possible to balance a small aperture of the first side of the first lens with high resolution of the optical lens, given a fixed image height and maximum field of view. Preferably, the optical lens can further satisfy: 0.009≤D / H / FOVx1°≤0.022, which is more conducive to achieving both a small aperture and high resolution of the optical lens. More preferably, the optical lens can further satisfy: 0.011≤D / H / FOVx1°≤0.019, which is more conducive to achieving both a small aperture and high resolution of the optical lens.

[0114] In an exemplary embodiment, the optical lens can satisfy: 1.5≤(F4+F5+F6) / F≤4, where F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, and F is the total effective focal length of the optical lens. In an exemplary embodiment, the fourth, fifth, and sixth lenses can be cemented together to form a cemented component, and the fourth lens can have a positive optical power, the fifth lens can have a negative optical power, and the sixth lens can have a positive optical power. By satisfying the above conditional expression and rationally allocating the effective focal length values ​​of the three lenses, the chromatic aberration of the entire optical lens can be effectively corrected, and the resolution can be improved. Preferably, the optical lens can further satisfy: 1.8≤(F4+F5+F6) / F≤3.2, which is more conducive to achieving small chromatic aberration and high resolution in the optical lens. More preferably, the optical lens can further satisfy: 2.215≤(F4+F5+F6) / F≤2.999, which is more conducive to achieving small chromatic aberration and high resolution in the optical lens.

[0115] In an exemplary embodiment, the optical lens can satisfy: |Sag31-Sag32| / d3≤0.4, where Sag31 is the sagitta of the first side of the third lens, Sag32 is the sagitta of the second side of the third lens, and d3 is the center thickness of the third lens. By satisfying the above condition, the lens ratio of the third lens is uniform, and the overall shape is relatively flat. This results in a smaller overall torque when the third lens is subjected to radial force, more uniform changes after thermal expansion and contraction, better thermal performance, and simpler processing of the optical lens, which helps to reduce manufacturing costs. Preferably, the optical lens can further satisfy: 0.02≤|Sag31-Sag32| / d3≤0.25, which is more conducive to achieving better temperature performance and lower cost of the optical lens. More preferably, the optical lens can further satisfy: 0.058≤|Sag31-Sag32| / d3≤0.195, which is more conducive to achieving better temperature performance and lower cost of the optical lens.

[0116] In an exemplary embodiment, the optical lens can satisfy: |F / R3|+|F / R4|≤2, where F is the total 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. By making the optical lens satisfy the above condition, the radius of curvature of the second lens can be controlled, and the height of the light rays emitted through the second lens can be adjusted, so that the rear optical system has a larger light receiving surface, which is beneficial to balancing aberrations and increasing the amount of light entering the optical lens. Preferably, the optical lens can further satisfy: 0.2≤|F / R3|+|F / R4|≤1.5, which is more conducive to achieving high resolution of the optical lens. More preferably, the optical lens can further satisfy: 0.413≤|F / R3|+|F / R4|≤1.221, which is more conducive to achieving high resolution of the optical lens.

[0117] In an exemplary embodiment, the optical lens can satisfy the condition: F / ENPD ≤ 2, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. By satisfying the above condition, a small FNO can be achieved, which is beneficial for increasing light transmission, and a large entrance pupil diameter also helps to improve relative illumination. Preferably, the optical lens can further satisfy: 1.75 ≤ F / ENPD ≤ 1.85, which is more conducive to achieving both high light transmission and high resolution of the optical lens.

[0118] In an exemplary embodiment, the optical lens can satisfy the condition: F3 / F456≤3, where F3 is the effective focal length of the third lens and F456 is the combined focal length of the fourth, fifth, and sixth lenses. By satisfying the above condition, the ratio of the effective focal length of the third lens to the combined focal length of the cemented component is controlled, allowing the diverging light rays in front to transition more smoothly to the rear, making the light more concentrated on the imaging plane, thereby improving the resolution of the optical lens. Preferably, the optical lens can further satisfy: 0.05≤F3 / F456≤2.8, which is more conducive to achieving high resolution. More preferably, the optical lens can further satisfy: 0.146≤F3 / F456≤1.799, which is more conducive to achieving high resolution.

[0119] In an exemplary embodiment, the optical lens can satisfy the condition: -3≤F1 / F≤-1, where F is the total effective focal length of the optical lens and F1 is the effective focal length of the first lens. By making the optical lens satisfy the above condition, the effective focal length of the first lens is smaller, which is beneficial for collecting light from a large field of view, allowing the light to enter the rear optical system well after being diverged by the first lens, thus increasing the light transmission. Preferably, the optical lens can further satisfy the condition: -2.8≤F1 / F≤-1.3, which is more conducive to achieving a large field of view, high light transmission, and high resolution in the optical lens. More preferably, the optical lens can further satisfy the condition: -2.629≤F1 / F≤-1.721, which is more conducive to achieving a large field of view, high light transmission, and high resolution in the optical lens.

[0120] In an exemplary embodiment, the optical lens can satisfy: 2 ≤ |F2 / F|, where F is the total effective focal length of the optical lens and F2 is the effective focal length of the second lens. By making the optical lens satisfy the above condition, the effective focal length of the second lens is made larger, so that the second lens can receive light rays that are significantly deflected from the first lens to the third lens, which is beneficial for a smooth transition of light, thereby reducing the sensitivity of the optical lens and improving the resolution quality. Since the maximum value of |F2 / F| in this application reaches 89.128, the second lens itself has little influence on the light path and is mainly used to receive light rays that are significantly deflected from the first lens to the third lens, playing a transitional role in the light. This effect can be achieved when the ratio of the effective focal length of the second lens to the total effective focal length approaches infinity (e.g., 1000, 10000, etc.). Therefore, in this application, the value of |F2 / F| does not need to be set with an upper limit. Preferably, the optical lens can further satisfy: 2.5 ≤ |F2 / F| ≤ 140, which is more conducive to achieving low sensitivity and high resolution of the optical lens. More preferably, the optical lens can further satisfy: 3.761≤|F2 / F|≤89.128, which is more conducive to achieving low sensitivity and high resolution of the optical lens.

[0121] In an exemplary embodiment, the optical lens can satisfy the condition: 2 ≤ F456 / F ≤ 20, where F is the total effective focal length of the optical lens, and F456 is the combined focal length of the fourth, fifth, and sixth lenses. By satisfying the above condition, light can be rapidly converged after passing through the third lens and then enter the cemented component. The cemented component can then slowly converge the light, which helps to reduce light sensitivity, reduce light energy loss, and improve resolution. Preferably, the optical lens can further satisfy: 2.3 ≤ F456 / F ≤ 18, which is more conducive to achieving low sensitivity and high resolution. More preferably, the optical lens can further satisfy: 2.67 ≤ F456 / F ≤ 13.182, which is more conducive to achieving low sensitivity and high resolution.

[0122] In an exemplary embodiment, the optical lens can satisfy: 3 ≤ |F7 / F|, where F is the total effective focal length of the optical lens and F7 is the effective focal length of the seventh lens. By satisfying the above condition, the effective focal length of the seventh lens is larger, which can receive the light emitted through the front cemented component, resulting in a small light deflection angle. This is beneficial for the light to be incident on the imaging plane approximately perpendicularly, thus reducing CRA. Since the maximum value of |F7 / F| in this application reaches 79.083, the seventh lens has a smaller impact on the light trajectory and is mainly used to receive the light emitted through the cemented component, resulting in a small light deflection angle and reducing CRA. This effect can be achieved when the ratio of the effective focal length of the seventh lens to the total effective focal length approaches infinity (e.g., 1000, 10000, etc.). Therefore, in this application, the value of |F7 / F| does not need to be set with an upper limit. Preferably, the optical lens can further satisfy: 3.5 ≤ |F7 / F| ≤ 125, which is more conducive to achieving both small CRA and high resolution in the optical lens. More preferably, the optical lens can further satisfy: 5.805≤|F7 / F|≤80, which is more conducive to achieving both small CRA and high resolution in the optical lens.

[0123] In an exemplary embodiment, the optical lens can satisfy the condition: 0.13 ≤ d456 / TTL ≤ 0.37, where d456 is the distance along the optical axis between the first side surface of the fourth lens and the second side surface of the sixth lens, and TTL is the total optical length of the optical lens. By satisfying the above condition, after the light is rapidly converged by the third lens and enters the cemented part, appropriately setting the thickness of the cemented part is beneficial for controlling the optical path, reducing chromatic aberration, and improving resolution. Preferably, the optical lens can further satisfy: 0.15 ≤ d456 / TTL ≤ 0.33, which is more conducive to achieving high resolution. More preferably, the optical lens can further satisfy: 0.190 ≤ d456 / TTL ≤ 0.293, which is more conducive to achieving high resolution.

[0124] In an exemplary embodiment, the optical lens can satisfy the condition: d34 / TTL ≤ 0.15, where TTL is the total optical length of the optical lens, and d34 is the distance between the third and fourth lenses along the optical axis. By satisfying the above condition and appropriately setting the distance between the third and fourth lenses along the optical axis, light can enter the cemented component smoothly while maintaining a compact overall structure of the optical lens, thereby reducing the sensitivity of the optical lens and improving resolution. Preferably, the optical lens can further satisfy: d34 / TTL ≤ 0.1, which is more conducive to achieving miniaturization and high resolution of the optical lens. More preferably, the optical lens can further satisfy: 0.003 ≤ d34 / TTL ≤ 0.087, which is more conducive to achieving miniaturization and high resolution of the optical lens.

[0125] In an exemplary embodiment, the optical lens can satisfy the condition: 0.1 ≤ d air gap / TTL ≤ 0.45, where TTL is the total optical length of the optical lens, and d air gap is the sum of the air gaps between the first lens and the seventh lens. By satisfying the above condition, the spacing between lenses can be reasonably controlled, which is beneficial to achieving high resolution while making the optical lens structure compact, thereby realizing the miniaturization of the optical lens. Preferably, the optical lens can further satisfy: 0.15 ≤ d air gap / TTL ≤ 0.37, which is more conducive to achieving both miniaturization and high resolution of the optical lens. More preferably, the optical lens can further satisfy: 0.204 ≤ d air gap / TTL ≤ 0.335, which is more conducive to achieving both miniaturization and high resolution of the optical lens.

[0126] In an exemplary embodiment, the optical lens can satisfy the following condition: -1.5 ≤ (1 / F1 + 1 / F2) / (1 / F3 + 1 / F456) ≤ -0.35, where F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F456 is the combined focal length of the fourth, fifth, and sixth lenses. Light rays tend to diverge at the front end of the optical lens and converge at the rear end. By satisfying the above condition, the optical power of the first, second, and third lenses and the cemented joint can be controlled, allowing the rear lens to better receive the light rays emitted from the front lens, thereby effectively changing the light trajectory and achieving high resolution. Preferably, the optical lens can further satisfy the following condition: -1.3 ≤ (1 / F1 + 1 / F2) / (1 / F3 + 1 / F456) ≤ -0.5, which is even more conducive to achieving high resolution. More preferably, the optical lens can further satisfy: -1.185≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.682, which is more conducive to achieving high resolution of the optical lens.

[0127] In an exemplary embodiment, the optical lens can satisfy the condition: d67 / TTL≤0.02, where d67 is the distance between the sixth and seventh lenses along the optical axis, and TTL is the total optical length of the optical lens. By satisfying the above condition, the distance between the sixth and seventh lenses along the optical axis is smaller, which is beneficial for the compact rear structure of the optical lens, thereby achieving miniaturization of the optical lens while maintaining high resolution. Preferably, the optical lens can further satisfy: d67 / TTL≤0.016, which is more conducive to achieving both miniaturization and high resolution. More preferably, the optical lens can further satisfy: 0.003≤d67 / TTL≤0.012, which is more conducive to achieving both miniaturization and high resolution.

[0128] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the seventh 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.

[0129] In an exemplary embodiment, the first to seventh 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 in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids problems such as lens blurring caused by high and low temperature changes in the operating environment, and prevents interference with the normal use of the lens. Specifically, when temperature performance and resolution quality are of paramount importance, the first to seventh lenses can all be aspherical glass lenses. In applications with lower temperature stability requirements, the first to seventh lenses in the optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Of course, the first to seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0130] In an exemplary embodiment, the first and / or second side surfaces of the seventh lens may be inverted, with a convex central portion and a concave edge portion, which is beneficial for better correcting aberrations of rays emitted from different fields of view while maintaining the overall flatness of the seventh lens.

[0131] The optical lens according to the above embodiments of this application, through the reasonable setting of parameters such as lens shape and optical power, enables the optical lens to have at least one beneficial effect such as low sensitivity, high resolution, small aperture, weak ghosting, high light transmission, miniaturization, large field of view, small CRA, small chromatic aberration, good temperature performance, low cost, and high light transmission.

[0132] 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 seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven 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.

[0133] Example 1

[0134] The optical lens according to Embodiment 1 of this application is described below with reference to FIG1. ​​FIG1 shows a schematic diagram of the structure of the optical lens according to Embodiment 1 of this application.

[0135] As shown in Figure 1, 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, and a seventh lens L7.

[0136] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0137] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0138] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0139] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0140] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0141] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0142] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0143] The fourth lens L4, the fifth lens L5, and the sixth lens L6 are cemented together to form a cemented component. The first side surface S11 and the second side surface S12 of the seventh lens L7 have inflection.

[0144] The optical lens may also include an aperture stop STO, which may be positioned between the second lens L2 and the third lens L3.

[0145] Optionally, the optical lens may also include a filter having a first side surface S13 and a second side surface S14, and a protective glass having a first side surface S15 and a second side surface S16.

[0146] The optical lens provided in this application can be used, for example, as an automotive lens. In this case, IMA in Figure 1 represents the imaging surface. Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging surface IMA 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. In this case, IMA in Figure 1 represents the image source surface. Light from the image source surface passes sequentially through surfaces S16 to S1 and is finally projected onto the projection surface (not shown) located on the first side.

[0147] Table 1 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 1.

[0148] Table 1

[0149] In Embodiment 1, the first side surface S11 and the second side surface S12 of the seventh lens L7 can be aspherical, and the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0150] 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 each aspherical mirror S11 and S12 in Example 1.

[0151] Table 2

[0152] Example 2

[0153] The optical lens according to Embodiment 2 of this application is described below with reference to FIG2. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. FIG2 shows a schematic structural diagram of the optical lens according to Embodiment 2 of this application.

[0154] As shown in Figure 2, 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, and a seventh lens L7.

[0155] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0156] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0157] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0158] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0159] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0160] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0161] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0162] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0163] 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 coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0164] Table 3

[0165] Table 4

[0166] Example 3

[0167] The optical lens according to Embodiment 3 of this application is described below with reference to FIG3. FIG3 shows a schematic diagram of the structure of the optical lens according to Embodiment 3 of this application.

[0168] As shown in Figure 3, 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, and a seventh lens L7.

[0169] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0170] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0171] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0172] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0173] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0174] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0175] The seventh lens L7 has negative optical power, and its first side surface S11 is concave and its second side surface S12 is concave.

[0176] Among them, the second side surface S12 of the seventh lens L7 has a recurve shape.

[0177] 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 coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0178] Table 5

[0179] Table 6

[0180] Example 4

[0181] The optical lens according to Embodiment 4 of this application is described below with reference to FIG4. FIG4 shows a schematic diagram of the structure of the optical lens according to Embodiment 4 of this application.

[0182] As shown in Figure 4, 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, and a seventh lens L7.

[0183] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0184] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0185] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0186] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0187] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0188] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0189] The seventh lens L7 has negative optical power, and its first side surface S11 is concave and its second side surface S12 is concave.

[0190] Among them, the second side surface S12 of the seventh lens L7 has a recurve shape.

[0191] 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 coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0192] Table 7

[0193] Table 8

[0194] Example 5

[0195] The optical lens according to Embodiment 5 of this application is described below with reference to FIG5. FIG5 shows a schematic diagram of the structure of the optical lens according to Embodiment 5 of this application.

[0196] As shown in Figure 5, 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, and a seventh lens L7.

[0197] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0198] The second lens L2 has negative optical power, and its first side surface S3 is concave, and its second side surface S4 is concave.

[0199] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0200] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0201] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0202] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0203] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0204] 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 coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0205] Table 9

[0206] Table 10

[0207] Example 6

[0208] The optical lens according to Embodiment 6 of this application is described below with reference to FIG6. FIG6 shows a schematic diagram of the structure of the optical lens according to Embodiment 6 of this application.

[0209] As shown in Figure 6, 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, and a seventh lens L7.

[0210] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0211] The second lens L2 has negative optical power, and its first side surface S3 is concave, and its second side surface S4 is concave.

[0212] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0213] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0214] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0215] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0216] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0217] 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 Embodiment 6. Table 12 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 6, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0218] Table 11

[0219] Table 12

[0220] Example 7

[0221] The optical lens according to Embodiment 7 of this application is described below with reference to FIG7. FIG7 shows a schematic diagram of the structure of the optical lens according to Embodiment 7 of this application.

[0222] As shown in Figure 7, 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, and a seventh lens L7.

[0223] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0224] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0225] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0226] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0227] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0228] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0229] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0230] 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 Embodiment 7. Table 14 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Embodiment 7, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0231] Table 13

[0232] Table 14

[0233] Example 8

[0234] The optical lens according to Embodiment 8 of this application is described below with reference to FIG8. FIG8 shows a schematic diagram of the structure of the optical lens according to Embodiment 8 of this application.

[0235] As shown in Figure 8, 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, and a seventh lens L7.

[0236] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0237] The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave.

[0238] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0239] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0240] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0241] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0242] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0243] 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. Table 16 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 8, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0244] Table 15

[0245] Table 16

[0246] Example 9

[0247] The optical lens according to Embodiment 9 of this application is described below with reference to FIG9. FIG9 shows a schematic diagram of the structure of the optical lens according to Embodiment 9 of this application.

[0248] As shown in Figure 9, 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, and a seventh lens L7.

[0249] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0250] The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0251] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0252] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0253] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0254] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0255] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0256] Table 17 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 9. Table 18 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 9, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0257] Table 17

[0258] Table 18

[0259] Example 10

[0260] The optical lens according to Embodiment 10 of this application is described below with reference to FIG10. FIG10 shows a schematic diagram of the structure of the optical lens according to Embodiment 2 of this application.

[0261] As shown in Figure 10, 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, and a seventh lens L7.

[0262] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0263] The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0264] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0265] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0266] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0267] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0268] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0269] Table 19 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 10. Table 20 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Embodiment 10, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0270] Table 19

[0271] Table 20

[0272] Example 11

[0273] The optical lens according to Embodiment 11 of this application is described below with reference to FIG11. FIG11 shows a schematic diagram of the structure of the optical lens according to Embodiment 11 of this application.

[0274] As shown in Figure 11, 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, and a seventh lens L7.

[0275] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0276] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0277] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0278] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0279] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0280] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0281] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0282] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0283] Table 21 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 22 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Example 11, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0284] Table 21

[0285] Table 22

[0286] Example 12

[0287] The optical lens according to Embodiment 12 of this application is described below with reference to FIG12. FIG12 shows a schematic diagram of the structure of the optical lens according to Embodiment 12 of this application.

[0288] As shown in Figure 12, 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, and a seventh lens L7.

[0289] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0290] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0291] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0292] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0293] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0294] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0295] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0296] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0297] 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 12. Table 24 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Example 12, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0298] Table 23

[0299] Table 24

[0300] Example 13

[0301] The optical lens according to Embodiment 13 of this application is described below with reference to FIG13. FIG13 shows a schematic diagram of the structure of the optical lens according to Embodiment 13 of this application.

[0302] As shown in Figure 13, 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, and a seventh lens L7.

[0303] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0304] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0305] The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex.

[0306] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0307] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0308] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0309] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0310] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0311] 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 13. Table 26 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Example 13, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0312] Table 25

[0313] Table 26

[0314] Example 14

[0315] The optical lens according to Embodiment 14 of this application is described below with reference to FIG14. FIG14 shows a schematic diagram of the structure of the optical lens according to Embodiment 14 of this application.

[0316] As shown in Figure 14, 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, and a seventh lens L7.

[0317] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0318] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0319] The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex.

[0320] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0321] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0322] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0323] The seventh lens L7 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0324] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0325] 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 14. Table 28 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 14, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0326] Table 27

[0327] Table 28

[0328] Example 15

[0329] The optical lens according to Embodiment 15 of this application is described below with reference to FIG15. FIG15 shows a schematic diagram of the structure of the optical lens according to Embodiment 15 of this application.

[0330] As shown in Figure 15, 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, and a seventh lens L7.

[0331] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0332] The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0333] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0334] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0335] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0336] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0337] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0338] Among them, the first side surface S11 of the seventh lens L7 has a recurve shape.

[0339] 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 15. Table 30 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 15, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0340] Table 29

[0341] Table 30

[0342] Example 16

[0343] The optical lens according to Embodiment 16 of this application is described below with reference to FIG16. FIG16 shows a schematic diagram of the structure of the optical lens according to Embodiment 16 of this application.

[0344] As shown in Figure 16, 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, and a seventh lens L7.

[0345] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0346] The second lens L2 has positive optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0347] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0348] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0349] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0350] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0351] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0352] Among them, the first side surface S11 of the seventh lens L7 has a recurve shape.

[0353] 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 Embodiment 16. Table 32 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 16, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0354] Table 31

[0355] Table 32

[0356] Example 17

[0357] The optical lens according to Embodiment 17 of this application is described below with reference to FIG17. FIG17 shows a schematic diagram of the structure of the optical lens according to Embodiment 17 of this application.

[0358] As shown in Figure 17, 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, and a seventh lens L7.

[0359] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0360] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0361] The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex.

[0362] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0363] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0364] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0365] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0366] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0367] 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 17. Table 34 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Example 17, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0368] Table 33

[0369] Table 34

[0370] Example 18

[0371] The optical lens according to Embodiment 18 of this application is described below with reference to FIG18. FIG18 shows a schematic diagram of the structure of the optical lens according to Embodiment 8 of this application.

[0372] As shown in Figure 18, 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, and a seventh lens L7.

[0373] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0374] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0375] The third lens L3 has positive optical power, with its first side surface S5 being concave and its second side surface S6 being convex.

[0376] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0377] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0378] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0379] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0380] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0381] 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 18. Table 36 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Example 18, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0382] Table 35

[0383] Table 36

[0384] Example 19

[0385] The optical lens according to Embodiment 19 of this application is described below with reference to FIG19. FIG19 shows a schematic diagram of the structure of the optical lens according to Embodiment 19 of this application.

[0386] As shown in Figure 19, 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, and a seventh lens L7.

[0387] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0388] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0389] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0390] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0391] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0392] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0393] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0394] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0395] 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 Embodiment 19. Table 38 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 19, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0396] Table 37

[0397] Table 38

[0398] Example 20

[0399] The optical lens according to Embodiment 20 of this application is described below with reference to FIG20. FIG20 shows a schematic diagram of the structure of the optical lens according to Embodiment 20 of this application.

[0400] As shown in Figure 20, 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, and a seventh lens L7.

[0401] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0402] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0403] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0404] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0405] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0406] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0407] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0408] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0409] Table 39 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 20. Table 40 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface that can be used in the aspherical lens L7 of Embodiment 20, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0410] Table 39

[0411] Table 40

[0412] Example 21

[0413] The optical lens according to Embodiment 21 of this application is described below with reference to FIG21. FIG21 shows a schematic diagram of the structure of the optical lens according to Embodiment 20 of this application.

[0414] As shown in Figure 21, 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, and a seventh lens L7.

[0415] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0416] The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex.

[0417] The third lens L3 has positive optical power, and its first side surface S5 is convex, and its second side surface S6 is convex.

[0418] The fourth lens L4 has positive optical power, and its first side surface S7 is convex, and its second side surface S8 is convex.

[0419] The fifth lens L5 has negative optical power, and its first side surface S8 is concave, and its second side surface S9 is concave.

[0420] The sixth lens L6 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0421] The seventh lens L7 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0422] Among them, the first side surface S11 and the second side surface S12 of the seventh lens L7 have inversion.

[0423] Table 41 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 21. Table 42 shows the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the first side surface S11 and the second side surface S12 of the aspherical mirror surface of the seventh lens L7 in Embodiment 21, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0424] Table 41

[0425] Table 42

[0426] In summary, Examples 1 to 21 satisfy the relationships shown in Tables 43-1 and 43-2 below. In Tables 43-1 and 43-2, the units of F, TTL, D, D14, H, BFL, F1 to F7, FR1, F456, Sag31, and Sag32 are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad).

[0427] Table 43-1

[0428] Table 43-2

[0429] Figure 22 shows a schematic diagram of the MTF curve of the optical lens according to the embodiments provided in this application. The optical lenses in embodiments 1 to 21 of this application can all achieve the effect shown in Figure 22, achieve good imaging quality, and meet the high resolution capability of 8M (megapixels).

[0430] The first design of this application also provides an electronic device, which 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. This 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.

[0431] The features, principles and other aspects of the second design scheme of this application are described in detail below.

[0432] In an exemplary embodiment, the optical lens includes, for example, seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. These seven lenses may be arranged sequentially along the optical axis from the first side to the second side.

[0433] In an exemplary embodiment, the first side may be the object side, and the second side may be the image side. Accordingly, the first side surface of each lens in the first lens, second lens, third lens, fourth lens and fifth lens may be the object side surface of each lens, and the second side surface of each lens may be the image side surface of each lens.

[0434] In an exemplary embodiment, the optical lens may further include an imaging surface and a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0435] In an exemplary embodiment, the optical lens of this application may further include a filter and / or protective glass disposed between the seventh lens and the imaging plane, as needed. The filter can filter light with a specific wavelength, and the protective glass can prevent damage to the second-side components (e.g., chips) of the optical lens.

[0436] In this paper, the center thickness (on the optical axis) of a lens can be understood as the distance on the optical axis from the center of the first side of the lens to the center of the second side of the lens. Taking the second lens as an example, the center thickness d2 of the second lens can be understood as the distance on the optical axis from the center of the first side of the second lens to the center of the second side of the second lens. Furthermore, in this paper, the air gap (on the optical axis) between two adjacent lenses can be understood as the distance on the optical axis from the center of the second side of the lens closer to the first side to the center of the first side of the lens closer to the second side. Taking the air gap d45 between the fourth and fifth lenses as an example, it can be understood as the distance on the optical axis from the center of the second side of the fourth lens to the center of the first side of the fifth lens.

[0437] In an exemplary embodiment, the first lens may have negative optical power. The first lens may have a convex-concave surface. Having negative optical power allows the first lens to diverge light rays passing through it. Under the same field of view, light rays exiting from the image-side surface of the first lens can provide a larger light-receiving surface for the subsequent optical system. The first lens can preferably be made of a high-refractive-index lens material, which is beneficial for reducing the front-end aperture and improving image quality. The object-side surface of the first lens is designed to be convex, which can collect as much light as possible from a large field of view into the subsequent optical system. Furthermore, in practical environments such as rain or snow, it can facilitate the sliding off of water droplets, reducing their impact on imaging. The image-side surface of the first lens is concave, which can quickly diverge large-angle light rays passing through the object-side surface of the first lens, which is beneficial for the subsequent optical system to correct aberrations of large-angle light rays and achieve high resolution.

[0438] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex shape. The negative optical power of the second lens has a diverging effect on light, which can disperse the central and peripheral rays in each field of view, expand the aperture of the rear light source, and increase the system illumination. The double-concave structure can better diverge the light, which is beneficial for correcting aberrations of the peripheral and central rays to achieve high resolution. Under the same field of view, the light emitted from the image side of the first lens can provide a larger light receiving surface for the subsequent optical system, achieving a greater amount of light intake and increasing the brightness of the image plane. The object side of the second lens is concave, which, in conjunction with the concave surface of the image side of the first lens, allows the light emitted from the second lens to smoothly enter the object side of the third lens, facilitating a smooth light transition, reducing light energy loss, improving the illumination of the peripheral field of view, and changing the trajectory of the peripheral rays. This reduces the front aperture of the lens, decreases its size, and is beneficial for miniaturization and cost reduction.

[0439] In an exemplary embodiment, the second lens may have negative optical power. The second lens may have a concave-convex surface. The object-side surface of the second lens is concave, which diverges light rays and is beneficial for receiving light rays diverging from the image-side surface of the first lens, resulting in smoother light emission and improving isometric aberrations. The image-side surface of the second lens is convex, which reduces the incident height of large-angle light rays, thereby reducing the rear aperture of the lens and facilitating lens miniaturization.

[0440] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a concave-convex surface. A positive optical power third lens converges incident light rays, allowing more light to enter the optical system, increasing luminous flux, converging diverging light rays, and improving image quality. A concave object side of the third lens better receives light rays diverging from the second lens, providing sufficient space for aberration adjustment of subsequent light rays. A convex image side increases the light deflection angle, further converging the light rays and achieving miniaturization of the rear end.

[0441] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface. The third lens is a positive focal length lens, and its object side is convex, which has a converging effect on light, further reducing aberrations and improving image quality; the image side of the third lens is convex, so that the light rays at the edge of the field of view tend to descend after passing through the image side of the third lens, avoiding excessive refraction of light and improving system sensitivity.

[0442] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-concave surface. The image-side shape of the third lens is concave, allowing light rays to further transition to the fourth lens, which helps to smooth the light path in the rear lens.

[0443] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-concave shape. As a positive focal length lens, the object-side surface is convex, which converges light rays, reduces the rear aperture, and, by appropriately setting the optical power of the fourth lens, can further reduce aberrations and improve image quality. The convex-concave shape of the fourth lens, with its convex object-side surface facilitating the collection of light rays entering the lens and its concave image-side surface allowing for appropriate divergence of edge rays, increases the light transmission of the optical system.

[0444] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may have a convex-convex surface. With the image side of the fourth lens being convex, the edge field rays converge further after passing through the image side of the fourth lens, which helps to reduce the rear port diameter of the system, while reducing energy loss and improving image quality.

[0445] In an exemplary embodiment, the fourth lens may have negative optical power. The fourth lens may have a convex-concave shape. Having negative optical power and a convex object-side surface compresses the angle of incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. With a convex object-side surface and a concave image-side surface, light reaches the image-side surface almost perpendicularly, resulting in minimal light deflection and energy loss, while also reducing lens sensitivity. When the fourth lens has negative optical power, its near-concentric circle shape serves as a transition for light.

[0446] In an exemplary embodiment, the fifth lens may have positive optical power. The fifth lens may have a convex-convex surface. The fifth lens is a positive lens, which has a converging effect on light rays. By controlling the focal length of the fifth lens, aberrations of the system can be effectively corrected, image quality can be improved, and optical performance such as distortion and CRA can be optimized.

[0447] In an exemplary embodiment, the fifth lens may have negative optical power. The fifth lens may have a convex-concave surface. As a negative focal length lens, the fifth lens has a diverging effect on light, allowing the subsequent optical system to have a larger light-receiving surface. Proper allocation of optical power helps reduce aberrations and improve optical performance.

[0448] In an exemplary embodiment, the sixth lens may have a negative optical power. The sixth lens may have a concave-convex surface. As a negative focal length lens, the sixth lens has a diverging effect on light. Properly setting the optical power of the sixth lens can further reduce aberrations and improve image quality. The convex surface on the image side converges light rays, adjusting the height of peripheral rays on the image plane, which is beneficial for improving CRA (Corrective Aberration Reduction). The fifth and sixth lenses may be cemented components, which can smoothly transition the light rays from the fourth lens to the imaging plane, reducing the overall length. Various aberrations of the optical system can be fully corrected. Under the premise of a compact structure, resolution can be improved, and optical performance such as distortion and CRA can be optimized. Using cemented components can also reduce the tolerance sensitivity of individual lens units due to tilt / eccentricity during assembly. Furthermore, the assembly method of the entire lens assembly reduces multiple assembly processes.

[0449] In an exemplary embodiment, the sixth lens may have negative optical power. The sixth lens may have a concave-convex surface. The negative optical power of the sixth lens adjusts the trajectory of the light rays emitted from the fifth lens, allowing the light to diverge more effectively to the rear lenses, reducing field curvature between different fields of view. The concave object-side surface of the sixth lens can receive and diverge forward light rays. Light rays from the edge fields of view will have a longer optical path after passing through the sixth lens than those from the center field of view, altering the trajectory of the light rays from the edge fields of view. This facilitates defocus correction of edge field aberrations and achieves high resolution. The concave image-side surface of the sixth lens helps to raise the height of the emitted light rays, reducing the overlap of light rays from different fields of view on the rear aspherical lens, allowing the rear lenses to better correct aberrations between different fields of view.

[0450] In an exemplary embodiment, the sixth lens may have positive optical power. The sixth lens may have a convex-convex surface. As a positive focal length lens, the sixth lens converges light rays, and its biconvex structure further deflects the light rays along the optical axis, reducing the rear aperture. The fifth and sixth lenses may be cemented together, allowing the light rays from the fourth lens to smoothly transition to the imaging plane, reducing the overall length. Various aberrations of the optical system can be adequately corrected, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure.

[0451] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a convex-concave surface. Negative optical power in the seventh lens facilitates light divergence, ensuring the angle of light rays to the image plane meets CRA requirements, improving resolution and illumination, increasing the image plane size, and achieving large angular resolution at the edges. The convex object-side surface of the seventh lens converges light rays, causing them to bend towards the center, improving the imaging quality of the central field of view. The concave image-side surface of the seventh lens further corrects system aberrations, improves image quality, and optimizes optical performance such as distortion and CRA.

[0452] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-convex surface. The object-side surface of the seventh lens is concave, which can better receive the light passing through the sixth lens and reduce light loss; the image-side surface is concave, which can further correct system aberrations, improve image quality, and optimize optical performance such as distortion and CRA.

[0453] In an exemplary embodiment, the seventh lens may have negative optical power. The seventh lens may have a concave-convex surface. The object-side surface of the seventh lens is concave, which can better receive the light passing through the sixth lens and reduce light loss; the image-side surface is convex, which can appropriately converge the light, achieving miniaturization while maintaining high resolution.

[0454] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a convex-concave shape. The positive optical power of the seventh lens is beneficial for light convergence, and the convex-concave shape allows diverging light to enter smoothly into the rear, which is beneficial for correcting system aberrations; at the same time, the seventh lens can reduce the height of light incident on the subsequent optical system, reducing the rear port diameter.

[0455] In an exemplary embodiment, the seventh lens may have positive optical power. The seventh lens may have a concave-convex surface. The seventh lens has positive optical power, a concave object side and a convex image side, which can effectively balance chromatic aberration, limit CRA, and improve resolution; furthermore, the aspherical surface design allows as much peripheral large-angle light as possible to smoothly transition to the rear optical system, correcting astigmatism and field curvature.

[0456] It should be noted that, in the above description of the optical power and surface shape of each lens among the first to seventh lenses, to avoid excessive repetition, the technical effects of some features have been omitted in the description of some exemplary embodiments for the technical effects of each lens under the corresponding optical power (positive or negative), the technical effects of the first side surface of each lens under the corresponding surface shape (convex or concave), and the technical effects of the second side surface of each lens under the corresponding surface shape (convex or concave). For the omitted technical effects, please refer to the relevant descriptions of the lens in other exemplary embodiments.

[0457] In an exemplary embodiment, the optical lens may further include an aperture stop. The aperture stop can constrain the optical path and control the light intensity. The aperture stop can be positioned appropriately within the optical lens; for example, it can be located between the fourth and fifth lenses. Properly positioning the aperture stop can facilitate effective light convergence entering the optical system, reduce the aperture of the lenses at the rear of the optical system, and decrease the system's assembly sensitivity. However, it should be noted that the aperture stop positions disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop can be positioned at other locations as needed.

[0458] In an exemplary embodiment, the fifth and sixth lenses can have opposite optical powers. The fifth and sixth lenses can be cemented together to form a cemented lens. The use of cemented components effectively eliminates the effect of ghosting on the lens, ensuring high resolution while eliminating ghosting. It also offers several technical advantages, such as: First, the use of cemented lenses allows for sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure; Second, the negative lens in the cemented component has a higher refractive index than the positive lens, allowing light to converge effectively and smoothly at the final point, ensuring a stable arrival at the imaging plane and reducing overall weight and cost; Third, it reduces light loss caused by reflections between lenses; the combination of high and low refractive indices facilitates rapid transition of light from the front, increasing the aperture and improving light transmission; Fourth, the use of cemented components reduces the air gap between the two lenses, resulting in a more compact overall optical system structure and reducing tolerance sensitivity issues such as overall eccentricity of the lens units during assembly.

[0459] In exemplary embodiments, the first to seventh lenses may include one or more aspherical lenses. Aspherical lenses have different curvatures at different positions, which can adjust the direction of light rays to converge on the image plane, providing better radius of curvature characteristics. This effectively corrects aberrations and field curvature, improving the resolving power of the optical system; it can also improve distortion aberrations and astigmatism, minimizing aberrations that occur during imaging and enhancing the image quality of the lens. For example, in some embodiments, an aspherical lens can be used, which may be the seventh lens. This is beneficial for correcting system aberrations and improving resolving power, especially reducing large field-of-view aberrations. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when resolving power is a primary concern. In particular, to improve the resolving power of the optical system, the first to seventh lenses may all be aspherical lenses.

[0460] In an exemplary embodiment, one or more of the first to seventh lenses may have inversion points. For example, in some embodiments, both the first and second sides of the seventh lens may have inversion points. Inversion helps to balance aberrations in the central and peripheral fields of view, thereby improving resolution.

[0461] In an exemplary embodiment, the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh lens can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids problems such as lens blurring caused by high and low temperature variations in the operating environment, and prevents interference with normal lens use. Specifically, when temperature performance and resolution quality are of paramount importance, the first to seventh lenses can all be aspherical glass lenses. In applications with lower temperature stability requirements, the first to seventh lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Of course, the first to seventh lenses in the optical lens can also be made of a combination of plastic and glass.

[0462] In an exemplary embodiment, the optical lens according to this application satisfies: 0.03 ≤ (d5 + d6) / TTL ≤ 0.2, where d5 is the center thickness of the fifth lens on the optical axis, d6 is the center thickness of the sixth lens on the optical axis, 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. The fifth and sixth lenses can be cemented together to form a cemented doublet lens. By controlling this conditional expression, appropriately increasing the center thickness of the cemented lens within a certain range is beneficial to enhancing the light control capability and improving image quality. More specifically, d5, d6, and TTL can further satisfy: 0.09 ≤ (d5 + d6) / TTL ≤ 0.16. By controlling the conditional expression within this range, it is even more beneficial to enhance the light control capability of the cemented component and improve image quality. More specifically, d5, d6, and TTL can also further satisfy: 0.1081 ≤ (d5 + d6) / TTL ≤ 0.1505, which is even more beneficial to enhancing the light control capability of the cemented component and improving image quality.

[0463] In an exemplary embodiment, the optical lens according to this application satisfies: 2 ≤ |F7 / F|, where F7 is the effective focal length of the seventh lens and F is the total effective focal length of the optical lens. The seventh lens has a larger focal length, resulting in less light deflection. This allows the seventh lens to be closer to the image plane, achieving a smaller back focal length and a larger image plane. It also helps to increase the distance from the sixth lens, improving system sensitivity and image quality. It should be noted that the maximum value of |F7 / F| in this application reaches 34.7521. The seventh lens has minimal influence on the light trajectory and acts as a transition point, receiving light emitted from the cemented component. This allows the seventh lens to be closer to the image plane, achieving a smaller back focal length and a larger image plane. It also helps to increase the distance from the sixth lens, improving system sensitivity and image quality. The same effect is achieved when |F7 / F| approaches infinity. In some exemplary embodiments, the absolute value of the effective focal length of the seventh lens can tend to be very large or close to infinity, for example, it can be a value such as 300, 500, or 1000. Therefore, the range of values ​​for the conditional expression |F7 / F| can also tend to be very large or close to infinity. More specifically, F7 and F can satisfy: 2≤|F7 / F|≤80; and further, can satisfy: 2.2≤|F7 / F|≤55. By controlling the conditional expression within the above range, it is more beneficial to control the light path, making the seventh lens closer to the image plane, which can better achieve a smaller back focal length and a larger image plane. This further helps to increase the distance from the sixth lens, which can further improve the sensitivity of the system and is more conducive to improving image quality. Furthermore, F7 and F can also satisfy: 2.6553≤|F7 / F|≤34.7521, which is more conducive to improving image quality.

[0464] In an exemplary embodiment, the optical lens according to this application satisfies: -5 ≤ R4 / R5 ≤ 0.8, where R4 is the radius of curvature of the second side surface of the second lens, and R5 is the radius of curvature of the first side surface of the third lens. By controlling this conditional expression, light rays passing through the first and second lenses can be continuously diverged, which is beneficial to increasing the incident height of edge rays, reducing distortion, and improving resolution. More specifically, R4 and R5 can further satisfy: -4 ≤ R4 / R5 ≤ 0.6. By controlling the conditional expression within this range, it is even more beneficial to increase the incident height of edge rays, further reducing distortion and improving resolution. Furthermore, R4 and R5 can also satisfy: -2.7008 ≤ R4 / R5 ≤ 0.3174, which is even more beneficial to improving image quality.

[0465] In an exemplary embodiment, the optical lens according to this application satisfies: -25 ≤ F2 / F ≤ -2, where F2 is the effective focal length of the second lens and F is the total effective focal length of the optical lens. By controlling this condition, the focal length of the second lens is larger, which is beneficial for receiving rapidly diverging light from the front, allowing the light to diverge more effectively into the rear optical system, while preventing excessive divergence that could affect the rear aperture, and also helps to reduce system sensitivity and improve image quality. More specifically, F2 and F can further satisfy: -20 ≤ F2 / F ≤ -2.5. By controlling the condition within this range, it is more beneficial for receiving rapidly diverging light from the front, allowing the light to diverge more effectively into the rear optical system without excessive divergence that could affect the rear aperture, while also helping to reduce system sensitivity and further improve image quality. Furthermore, F2 and F can also satisfy: -14.9343 ≤ F2 / F ≤ -3.0069, which is even more beneficial for improving image quality.

[0466] In an exemplary embodiment, the optical lens according to this application satisfies: 0.06 ≤ d45 / TTL ≤ 0.2, where d45 is the air gap between the fourth and fifth lenses on the optical axis, 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. In the optical lens according to this application, light begins to converge after passing through the third lens, and the light emitted from the fourth lens exhibits an overall converging trend. By controlling this condition, and with a larger distance between the fourth and fifth lenses, it is beneficial for the light to be effectively converged, reducing the rear aperture. At the same time, the light can smoothly transition to the fifth lens, reducing the aberrations caused by the continuous convergence of the third and fourth lenses, which is beneficial for improving image quality. Furthermore, by reasonably setting the distance between the fourth and fifth lenses, space is left for adjusting the back focus, which can solve the assembly problem while meeting the requirements of miniaturization and achieving high resolution. More specifically, the d45 and TTL settings can further satisfy: 0.07 ≤ d45 / TTL ≤ 0.18. By controlling the conditional expression within this range, it is more conducive to effective light convergence, reducing the rear aperture. Simultaneously, the light can transition more smoothly to the fifth lens, reducing aberrations caused by the continuous convergence of the third and fourth lenses, further improving image quality. At the same time, it allows for more flexibility in adjusting the back focus, facilitating assembly while maintaining miniaturization, and further achieving high resolution. Furthermore, the d45 and TTL settings can also satisfy: 0.0806 ≤ d45 / TTL ≤ 0.1501, which is even more conducive to improving image quality.

[0467] In an exemplary embodiment, the optical lens according to this application satisfies: TTL / F ≤ 4.5, 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 total effective focal length of the optical lens. By controlling this conditional expression, the lens length can be effectively limited, which is beneficial for lens miniaturization while maintaining telephoto capabilities. More specifically, TTL and F can further satisfy: 3.5 ≤ TTL / F ≤ 4.3. By controlling the conditional expression within this range, the lens length can be further effectively limited, which is even more beneficial for lens miniaturization while maintaining telephoto capabilities. Furthermore, TTL and F can also satisfy: 3.8753 ≤ TTL / F ≤ 4.1300, which is even more beneficial for improving image quality while maintaining miniaturization.

[0468] In an exemplary embodiment, the optical lens according to this application satisfies: 1.5 ≤ F3 / F ≤ 8, where F3 is the effective focal length of the third lens and F is the total effective focal length of the optical lens. By controlling this conditional expression, the third lens effectively converges the continuously diverging light rays in front, resulting in a larger focal length and a smaller light deflection angle, which helps reduce light sensitivity and simultaneously controls the amount of light transmitted, thus improving image quality. This conditional expression is further combined with the conditional expression -25 ≤ F2 / F ≤ -2, resulting in larger focal lengths for both the second and third lenses, allowing light to smoothly transition to the rear lens element, reducing the sensitivity of the optical system, and further improving image quality. More specifically, F3 and F can further satisfy: 1.7 ≤ F3 / F ≤ 6.5. By controlling the conditional expression within this range, it is possible to further reduce light sensitivity and better control the amount of light transmitted, further improving image quality. This conditional expression is combined with the conditional expression -25 ≤ F2 / F ≤ -2, resulting in larger focal lengths for both the second and third lenses, allowing light to transition more smoothly to the rear lens element, further reducing the sensitivity of the optical system, and further improving image quality. Furthermore, F3 and F can also satisfy: 1.8948≤F3 / F≤4.9664, which is more conducive to improving image quality.

[0469] 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 of the seventh 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. By controlling this conditional expression, the adjustment space of the module is satisfied, the system optical back focal length BFL is small, the overall length of the lens is compressed, and lens miniaturization can be achieved. More specifically, BFL and TTL can further satisfy: 0.08 ≤ BFL / TTL ≤ 0.13. By controlling the conditional expression within this range, lens miniaturization can be further achieved. Furthermore, BFL and TTL can also satisfy: 0.0920 ≤ BFL / TTL ≤ 0.1209, which is more conducive to improving image quality on the basis of miniaturization.

[0470] In an exemplary embodiment, the optical lens according to this application satisfies: 0.05 ≤ d67 / TTL ≤ 0.2, where d67 is the air gap between the sixth and seventh lenses on the optical axis, 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. In the optical lens according to this application, the light rays generally exhibit a continuous converging trend before reaching the sixth lens. By controlling this conditional expression, the gap between the sixth and seventh lenses is set to be relatively large, increasing the optical path of the reflected light rays between the lenses. This is beneficial for the ghost image focal point to move away from the image plane, thus reducing ghost images. At the same time, it is beneficial for the forward-converging light rays to transition smoothly, achieving beam splitting. Combined with the larger focal length of the seventh lens, this further reduces field curvature and improves resolution. More specifically, d67 and TTL can further satisfy: 0.06 ≤ d67 / TTL ≤ 0.15. By controlling the conditional expression within this range, it is further beneficial for the ghost image focal point to move away from the image plane, further reducing ghost images. At the same time, it is more beneficial for the forward-converging light rays to transition smoothly, achieving beam splitting. Combined with the larger focal length of the seventh lens, this further reduces field curvature and improves resolution. Furthermore, d67 and TTL can also satisfy the condition: 0.0710≤d67 / TTL≤0.1247, which is more conducive to improving image quality.

[0471] In an exemplary embodiment, the optical lens according to this application satisfies: |(HF×θ) / (F×θ)|≤0.1, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value of the maximum field of view of the optical lens. By controlling this conditional expression, it is ensured that the focal length of the lens is increased while the lens field of view and the size of the imaging plane remain unchanged, thus highlighting the imaging effect of the central area of ​​the lens imaging plane. More specifically, H, F, and θ can further satisfy: 0.002≤|(HF×θ) / (F×θ)|≤0.08. By controlling the conditional expression within this range, it is more advantageous to ensure that the focal length of the lens is increased while the lens field of view and the size of the imaging plane remain unchanged, thus highlighting the imaging effect of the central area of ​​the lens imaging plane. Furthermore, H, F, and θ can also satisfy: 0.0039≤|(HF×θ) / (F×θ)|≤0.0558, which is more conducive to improving image quality.

[0472] In an exemplary embodiment, the optical lens according to this application satisfies: -0.5 ≤ R3 / R4 ≤ 2, where 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. By controlling this conditional expression, the special lens shape setting of the second lens facilitates a smooth transition of light path, reduces system sensitivity, and improves performance. More specifically, R3 and R4 can further satisfy: -0.3 ≤ R3 / R4 ≤ 1.2. By controlling the conditional expression within this range, it can further facilitate a smooth transition of light path, further reduce system sensitivity, and further improve performance. More specifically, R3 and R4 can also satisfy: -0.0605 ≤ R3 / R4 ≤ 0.8217, which is more conducive to improving image quality.

[0473] In an exemplary embodiment, the optical lens according to this application satisfies: 50 ≤ (FOV × F) / H ≤ 75, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling this conditional expression, telephoto and wide field-of-view imaging can be achieved while satisfying a certain image height. More specifically, FOV, F, and H can further satisfy: 55 ≤ (FOV × F) / H ≤ 65. By controlling the conditional expression within this range, it is more advantageous to achieve telephoto and wide field-of-view imaging while satisfying a certain image height, thereby improving image quality. More specifically, FOV, F, and H can also further satisfy: 57.0731 ≤ (FOV × F) / H ≤ 60.6826, which is even more beneficial for improving image quality.

[0474] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ D / H / F ≤ 0.25, where D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression and reasonably setting the relationship between aperture, image height, and focal length, the lens can be provided with the characteristics of a large target surface and a small aperture. More specifically, D, H, and F can further satisfy: 0.12 ≤ D / H / F ≤ 0.19. By controlling the conditional expression within this range, it is more conducive to achieving the characteristics of a large target surface, a small aperture, and high resolution. More specifically, D, H, and F can also satisfy: 0.1434 ≤ D / H / F ≤ 0.1808, which is more conducive to improving image quality.

[0475] In an exemplary embodiment, the optical lens according to this application satisfies: -2.8 ≤ F1 / F ≤ -1, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. By controlling this conditional expression, the focal length of the first lens is rationally allocated, which is beneficial for collecting light rays with a large field of view into the optical system. More specifically, F1 and F can further satisfy: -2.2 ≤ F1 / F ≤ -1.2. By controlling the conditional expression within this range, it is even more beneficial for collecting light rays with a large field of view into the optical system. More specifically, F1 and F can also satisfy: -1.9572 ≤ F1 / F ≤ -1.3275, which is even more beneficial for improving image quality.

[0476] In an exemplary embodiment, the optical lens according to this application satisfies: -1≤F / F4≤1.5, where F is the total effective focal length of the optical lens and F4 is the effective focal length of the fourth lens. By controlling this conditional expression, the optical power of the fourth lens can be reasonably controlled, which is beneficial for the continuous convergence of light emitted from the third lens, reducing the rear port diameter and achieving a short TTL. More specifically, F and F4 can further satisfy: -0.5≤F / F4≤1. By controlling the conditional expression within this range, it is even more beneficial for the continuous convergence of light emitted from the third lens, further reducing the rear port diameter and further facilitating the achievement of a short TTL. More specifically, F and F4 can also satisfy: -0.1922≤F / F4≤0.7230, which is more beneficial for improving image quality while taking into account miniaturization.

[0477] In an exemplary embodiment, the optical lens according to this application satisfies: 0.005 ≤ d2 / TTL ≤ 0.12, where d2 is the center thickness of the second lens on the optical axis, 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. By controlling this conditional expression, the center thickness of the second lens can be reasonably controlled. Combined with its relatively large focal length, this helps to shorten the optical path, allowing more edge light rays to enter the rear optical system and increasing the light transmission of the optical system. More specifically, d2 and TTL can further satisfy: 0.01 ≤ d2 / TTL ≤ 0.09. By controlling the conditional expression within this range, it is possible to further shorten the optical path, further allow more edge light rays to enter the rear optical system, and further increase the light transmission of the optical system. More specifically, d2 and TTL can also further satisfy: 0.0250 ≤ d2 / TTL ≤ 0.0759, which is more conducive to improving image quality.

[0478] In an exemplary embodiment, the optical lens according to this application satisfies: (d23+d34) / TTL≤0.1, where d23 is the air gap between the second and third lenses on the optical axis, d34 is the air gap between the third and fourth lenses on the optical axis, 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. By controlling this conditional expression, the air gaps between the second and third lenses, and between the third and fourth lenses, are reduced, making the front-end structure of the optical lens more compact and leaving sufficient space for the rear lens elements, which is beneficial for achieving high resolution while satisfying miniaturization. More specifically, d23, d34, and TTL can further satisfy: (d23+d34) / TTL≤0.06. By controlling the conditional expression within this range, the front-end structure of the optical lens can be further made more compact, leaving sufficient space for the rear lens elements, which is further beneficial for achieving high resolution while satisfying miniaturization. More specifically, d23, d34 and TTL can also satisfy: 0.0065≤(d23+d34) / TTL≤0.0428, which is more conducive to improving imaging quality while taking into account miniaturization.

[0479] In an exemplary embodiment, the optical lens according to this application satisfies: d23 / TTL ≤ 0.08, where d23 is the air gap between the second and third lenses on the optical axis, 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. By controlling this conditional expression, the gap between the second and third lenses is smaller, which is beneficial for miniaturization; the combination of negative and positive optical powers of the second and third lenses is beneficial for correcting aberrations and improving resolution. More specifically, d23 and TTL can further satisfy: d23 / TTL ≤ 0.06. By controlling the conditional expression within this range, miniaturization can be further facilitated; the combination of negative and positive optical powers of the second and third lenses is even more beneficial for correcting aberrations and further improving resolution. More specifically, d23 and TTL can also satisfy: 0.0032 ≤ d23 / TTL ≤ 0.0397, which is more beneficial for improving image quality while maintaining miniaturization.

[0480] In an exemplary embodiment, the optical lens according to this application satisfies: d34 / TTL ≤ 0.01, where d34 is the air gap between the third and fourth lenses on the optical axis, 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. By controlling this conditional expression, reducing the gap between the third and fourth lenses facilitates continuous light convergence, reduces light energy loss, and while reducing TTL, makes the light transition smoother, thus reducing sensitivity. More specifically, d34 and TTL can further satisfy: d34 / TTL ≤ 0.005. By controlling the conditional expression within this range, it is even more beneficial for continuous light convergence, further reducing light energy loss, and while reducing TTL, making the light transition smoother, further reducing sensitivity. More specifically, d34 and TTL can also satisfy: 0.0031 ≤ d34 / TTL ≤ 0.0032, which is more beneficial for improving image quality.

[0481] In an exemplary embodiment, the optical lens according to this application satisfies: 0.7 ≤ F / H ≤ 0.95, where F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling this conditional expression and setting an appropriate relationship between focal length and image height, it is beneficial to improve the system's imaging sharpness and achieve a large image plane. More specifically, F and H can further satisfy: 0.75 ≤ F / H ≤ 0.9. By controlling the conditional expression within this range, it is even more beneficial to improve the system's imaging sharpness and achieve a large image plane. More specifically, F and H can also satisfy: 0.8142 ≤ F / H ≤ 0.8657, which is even more beneficial to improving image quality.

[0482] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ R7 / F ≤ 2.5, where R7 is the radius of curvature of the first side surface of the fourth lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the object-side surface of the fourth lens is convex, and the radius of curvature value is small, effectively converging light rays into the rear optical system, which is beneficial for reducing the rear port diameter, increasing light transmission, and improving image quality. More specifically, R7 and F can further satisfy: 0.7 ≤ R7 / F ≤ 1.8. By controlling the conditional expression within this range, it is more beneficial for the object-side surface of the fourth lens to effectively converge light rays into the rear optical system, further reducing the rear port diameter, increasing light transmission, and improving image quality. More specifically, R7 and F can also further satisfy: 0.9915 ≤ R7 / F ≤ 1.6721, which is more beneficial for improving image quality.

[0483] In an exemplary embodiment, the optical lens according to this application satisfies: -3≤R11 / F≤1.5, where R11 is the radius of curvature of the second side surface of the fifth lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, the ratio of the radius of curvature of the image side surface of the fifth lens to the focal length of the lens can be reasonably controlled within a certain range, which can help smooth the light path, especially the light at the edge of the field of view, and can better correct aberrations, improve image quality, and achieve high resolution. More specifically, R11 and F can further satisfy: -2≤R11 / F≤1. By controlling the conditional expression within this range, it is more conducive to smoothing the light path, especially the light at the edge of the field of view, and can better correct aberrations, further improving image quality and achieving high resolution. More specifically, R11 and F can also satisfy: -1.5128≤R11 / F≤0.6900, which is more conducive to improving image quality.

[0484] In an exemplary embodiment, the optical lens according to this application satisfies: -8 ≤ F5 / F6 ≤ -0.1, where F5 is the effective focal length of the fifth lens and F6 is the effective focal length of the sixth lens. The fifth and sixth lenses are cemented together to form a cemented component. By controlling this conditional expression, the focal lengths of the two lenses in the cemented component can be reasonably controlled, which is beneficial for correcting chromatic aberration and improving image quality. More specifically, F5 and F6 can further satisfy: -6 ≤ F5 / F6 ≤ -0.2. By controlling the conditional expression within this range, it is further beneficial for correcting chromatic aberration and improving image quality. More specifically, F5 and F6 can also satisfy: -3.7543 ≤ F5 / F6 ≤ -0.2725, which is even more beneficial for improving image quality.

[0485] In an exemplary embodiment, the optical lens according to this application satisfies: (R1 / D) / (R2 / D2)≤9, where R1 is the radius of curvature of the first side of the first lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, R2 is the radius of curvature of the second side of the first lens, and D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens. By controlling this conditional expression, the radius of curvature and aperture of the two sides of the first lens can be reasonably controlled. When the first lens has a negative optical power, the difference between the radius of curvature values ​​of the two sides is small and the aperture values ​​of the two sides are closer, which can reduce light divergence, which is beneficial to suppressing light and making the front aperture of the lens smaller. More specifically, R1, D, R2 and D2 can further satisfy: 1.25≤(R1 / D) / (R2 / D2)≤7.75. By controlling the conditional expression within this range, it is further beneficial to reduce light divergence, further beneficial to suppressing light, and further making the front aperture of the lens smaller. More specifically, R1, D, R2, and D2 can also satisfy: 2.5211≤(R1 / D) / (R2 / D2)≤6.4461, which is more conducive to improving imaging quality while taking into account the small aperture of the front end.

[0486] In an exemplary embodiment, the optical lens according to this application satisfies: F / ENPD ≤ 2, where F is the total effective focal length of the optical lens and ENPD is the entrance pupil diameter of the optical lens. By controlling this conditional expression, a small FNO of the lens is achieved, which is beneficial for increasing light transmission, and a large entrance pupil diameter helps to improve relative illumination. More specifically, F and ENPD can further satisfy: 1.7 ≤ F / ENPD ≤ 1.9. By controlling the conditional expression within this range, it is more beneficial for increasing light transmission and further helps to improve relative illumination. More specifically, F and ENPD can also satisfy: 1.8000 ≤ F / ENPD ≤ 1.8200, which is more beneficial for improving image quality.

[0487] In an exemplary embodiment, the optical lens according to this application satisfies: 1.8 ≤ R1 / F ≤ 8.5, where R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens. By controlling this conditional expression, controlling the radius of curvature of the object side surface of the first lens can move the pupil image of the ghost image away from the focal plane, making the ghost image light rays on the image plane relatively divergent, effectively reducing the relative energy value of the ghost image, and improving the quality of the image captured by the lens. More specifically, R1 and F can further satisfy: 2 ≤ R1 / F ≤ 8. By controlling the conditional expression within this range, it is more conducive to moving the pupil image of the ghost image away from the focal plane, making the ghost image light rays on the image plane relatively divergent, further effectively reducing the relative energy value of the ghost image, and further improving the quality of the image captured by the lens. More specifically, R1 and F can also satisfy: 2.2309 ≤ R1 / F ≤ 5.8821, which is more conducive to improving image quality.

[0488] In an exemplary embodiment, the optical lens according to this application satisfies: -10≤R6 / R7≤25, where R6 is the radius of curvature of the second side of the third lens and R7 is the radius of curvature of the first side of the fourth lens. By controlling this conditional expression, the radius of curvature of the image side of the third lens and the object side of the fourth lens can be reasonably set, which is beneficial for more light to enter the fourth lens and increase the light transmission capability of the system. Furthermore, since the image side of the third lens and the object side of the fourth lens are opposite, the light can be effectively converged, reducing light energy loss and further reducing the rear port diameter, thus achieving high resolution. More specifically, R6 and R7 can further satisfy: -7≤R6 / R7≤-0.5. By controlling the conditional expression within this range, it is possible to further facilitate more light to enter the fourth lens, increasing the light transmission capability of the system. Moreover, the light can be more effectively converged, further reducing light energy loss and further reducing the rear port diameter, which is more conducive to achieving high resolution. More specifically, R6 and R7 can also satisfy: -5.5184≤R6 / R7≤17.6805, which is more conducive to improving image quality.

[0489] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ F56 / F ≤ 30, where F56 is the combined focal length of the fifth and sixth lenses, and F is the total effective focal length of the optical lens. The fifth and sixth lenses are cemented together to form a cemented component. By controlling this conditional expression, the combined focal length of the cemented component can be reasonably managed, effectively controlling the light path entering the cemented component, reducing aberrations caused by large-angle light entering from the front end, and improving resolving performance. More specifically, F56 and F can further satisfy: 0.7 ≤ F56 / F ≤ 24. By controlling the conditional expression within this range, the light path entering the cemented component can be more effectively controlled, further reducing aberrations caused by large-angle light entering from the front end, and further contributing to improved resolving performance. More specifically, F56 and F can also satisfy: 0.9904 ≤ F56 / F ≤ 19.2509, which is more conducive to improving image quality.

[0490] An optical lens according to an exemplary embodiment of this application includes seven lenses with optical power, namely, lenses numbered one to seven arranged sequentially from a first side to a second side along the optical axis. The first lens has negative optical power, with a convex first side and a concave second side; the second lens has negative optical power, with a concave first side; the third lens has positive optical power; the fourth lens has a convex first side; the fifth and sixth lenses are cemented together, and the fifth and sixth lenses have opposite optical power properties; furthermore, the center thickness d5 of the fifth lens on the optical axis, the center thickness d6 of the sixth lens on the optical axis, and the center of the first side of the first lens are used to image the optical lens. The distance TTL between the surfaces on the optical axis satisfies the condition 0.03≤(d5+d6) / TTL≤0.2; the effective focal length F7 of the seventh lens and the total effective focal length F of the optical lens satisfy the condition 2≤|F7 / F|; the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the condition -5≤R4 / R5≤0.8; the effective focal length F2 of the second lens and F satisfy the condition -25≤F2 / F≤-2; the air gap d45 between the fourth and fifth lenses on the optical axis and TTL satisfy the condition 0.06≤d45 / TTL≤0.2; TTL and F satisfy the condition TTL / F≤4.5. By appropriately increasing the thickness of the cemented lens elements within a certain range, this lens configuration enhances light control and improves image quality. A well-controlled seventh lens with a relatively large focal length results in less light deflection, allowing it to be closer to the image plane, achieving a smaller back focal length and a larger image plane. This also helps to increase the distance from the sixth lens, improving system sensitivity and image quality. Furthermore, carefully managing the ratio of the curvature radius of the second side of the second lens to that of the first side of the third lens continuously diffuses light rays passing through the first and second lenses, increasing the incident height of edge rays, reducing distortion, and improving resolution. Finally, a well-controlled second lens with a relatively large focal length effectively receives rapidly diverging light rays from the front, further dispersing the light. The optical system is designed to be integrated into the rear optical system without excessive divergence affecting the rear aperture, while simultaneously reducing system sensitivity and improving image quality. Light rays begin to converge after passing through the third lens and continue converging after exiting through the fourth lens. The relatively large distance between the fourth and fifth lenses facilitates effective light convergence, reducing the rear aperture. Simultaneously, the light rays smoothly transition to the fifth lens, minimizing aberrations caused by the continuous convergence of the third and fourth lenses, thus improving image quality. Furthermore, a well-designed distance between the fourth and fifth lenses allows for adjustments to the rear focal length, solving assembly issues while maintaining miniaturization and achieving high resolution. Moreover, the length of the optical lens in this application can be effectively limited, allowing for miniaturization while maintaining a telephoto lens.

[0491] The optical lens according to the exemplary embodiments of this application adopts a seven-element lens architecture. By reasonably setting parameters such as lens power, surface shape, radius of curvature, center thickness and air gap between lenses, the optical lens can have one or more beneficial effects such as high resolution, low sensitivity, weak ghosting, miniaturization and high light throughput, so that the optical lens can better meet the high requirements of applications such as automotive.

[0492] 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 seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven 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.

[0493] Example 22

[0494] The optical lens according to Embodiment 22 of this application will be described below with reference to FIG23. FIG23 shows a schematic diagram of the structure of the optical lens according to Embodiment 22 of this application.

[0495] As shown in Figure 23, the optical lens includes, in sequence from the first side to the second side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a sixth lens L6, and a seventh lens L7, as well as, for example, a filter IR, a protective glass CG, and an image plane IMA located on the second side of the seventh lens L7.

[0496] The first lens L1 is a convex-concave lens with negative 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 convex-convex lens with positive optical power, its first side surface S5 is convex, 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 negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 is a convex-convex lens with positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 is a concave-concave lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave.

[0497] In this embodiment, the fifth lens L5 and the sixth lens L6 are cemented together to form a cemented doublet lens. The seventh lens L7 is an aspherical lens. The aperture stop STO is located between the fourth lens L4 and the fifth lens L5. The second side surface S14 of the seventh lens L7 has a curvature point.

[0498] In this embodiment, the filter IR has, for example, a first side surface S15 and a second side surface S16; the protective glass CG has, for example, a first side surface S17 and a second side surface S18.

[0499] When the optical lens is used for photography, light from the object can pass through each surface S1 to S18 in sequence and finally form an image on the imaging surface; when the optical lens is used for projection, light from the light source side can pass through each surface S18 to S1 in sequence and finally be projected onto the target object (not shown).

[0500] Table 44 shows the radius of curvature R, thickness / distance, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 22. Regarding "thickness / distance," it should be understood that the thickness / distance in row S1 is the center thickness of the first lens L1, the thickness / distance in row S2 is the air gap between the first lens L1 and the second lens L2, the thickness / distance in row S3 is the center thickness of the second lens L2, the thickness / distance in row S4 is the air gap between the second lens L2 and the third lens L3, and so on.

[0501] Table 44

[0502] In this embodiment, the first side surface S13 and the second side surface S14 of the seventh lens L7 are aspherical surfaces. The surface shape of the aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0503] Where x is the distance vector from the vertex of the aspherical surface at a height of 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 45 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 S13-S14 in Example 22.

[0504] Table 45

[0505] Example 23

[0506] Figure 24 shows a schematic diagram of the optical lens according to Embodiment 23 of this application. For the sake of brevity, descriptions similar to those in Embodiment 22 will be omitted in this embodiment and the following embodiments.

[0507] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-concave lens with negative optical power, its first side surface S11 is concave, 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. In this embodiment, both the first side surface S13 and the second side surface S14 of the seventh lens L7 have inflection points.

[0508] Table 46 shows the basic parameters of the optical lens of Example 23. Table 47 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example, wherein each aspherical surface shape can be defined by formula (1) given in Example 22 above.

[0509] Table 46

[0510] Table 47

[0511] Example 24

[0512] Figure 25 shows a schematic diagram of the structure of an optical lens according to Embodiment 24 of this application.

[0513] The difference from Embodiment 22 is that, in this embodiment, 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 positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-concave lens with negative optical power, its first side surface S11 is concave, 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.

[0514] Table 48 shows the basic parameters of the optical lens of Example 24. Tables 49 and 50 show the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0515] Table 48

[0516] Table 49

[0517] Table 50

[0518] Example 25

[0519] Figure 26 shows a schematic diagram of the structure of an optical lens according to Embodiment 24 of this application.

[0520] The difference from Embodiment 22 is that, in this embodiment, the fourth lens L4 is a convex-planar lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is planar. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex.

[0521] Table 51 shows the basic parameters of the optical lens of Example 24. Table 52 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0522] Table 51

[0523] Table 52

[0524] Example 26

[0525] Figure 27 shows a schematic diagram of the structure of an optical lens according to Embodiment 26 of this application.

[0526] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a convex-concave lens with positive optical power, its first side surface S5 is convex, 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 S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex. 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. In this embodiment, both the first side surface S13 and the second side surface S14 of the seventh lens L7 have inflection points.

[0527] Table 53 shows the basic parameters of the optical lens of Example 26. Table 54 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0528] Table 53

[0529] Table 54

[0530] Example 27

[0531] Figure 28 shows a schematic diagram of the structure of an optical lens according to Embodiment 27 of this application.

[0532] The difference from Embodiment 22 is that, in this embodiment, the fourth lens L4 is a convex-concave lens with negative 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 S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex.

[0533] Table 55 shows the basic parameters of the optical lens of Example 27. Table 56 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0534] Table 55

[0535] Table 56

[0536] Example 28

[0537] Figure 29 shows a schematic diagram of the structure of an optical lens according to Embodiment 28 of this application.

[0538] The difference from Embodiment 22 is that, in this embodiment, 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 S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex.

[0539] Table 57 shows the basic parameters of the optical lens of Example 28. Table 58 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0540] Table 57

[0541] Table 58

[0542] Example 29

[0543] Figure 30 shows a schematic diagram of the structure of an optical lens according to Embodiment 29 of this application.

[0544] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex. In this embodiment, the first side surface S13 and the second side surface S14 of the seventh lens L7 both have inflection points.

[0545] Table 59 shows the basic parameters of the optical lens of Example 29. Table 60 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0546] Table 59

[0547] Table 60

[0548] Example 30

[0549] Figure 31 shows a schematic diagram of the structure of an optical lens according to Embodiment 30 of this application.

[0550] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 is a concave-convex lens with negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex.

[0551] Table 61 shows the basic parameters of the optical lens of Example 30. Table 62 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0552] Table 61

[0553] Table 62

[0554] Example 31

[0555] Figure 32 shows a schematic diagram of the structure of an optical lens according to Embodiment 31 of this application.

[0556] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-concave lens with negative optical power, its first side surface S11 is concave, 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. In this embodiment, both the first side surface S13 and the second side surface S14 of the seventh lens L7 have inflection points.

[0557] Table 63 shows the basic parameters of the optical lens of Example 31. Table 64 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0558] Table 63

[0559] Table 64

[0560] Example 32

[0561] Figure 33 shows a schematic diagram of the structure of an optical lens according to Embodiment 32 of this application.

[0562] The difference from Embodiment 22 is that, in this embodiment, the third lens L3 is a concave-convex lens with positive optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 is a concave-convex lens with negative optical power, its first side surface S11 is concave, and its second side surface S12 is convex. 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. In this embodiment, both the first side surface S13 and the second side surface S14 of the seventh lens L7 have inflection points.

[0563] Table 65 shows the basic parameters of the optical lens of Example 32. Table 66 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0564] Table 65

[0565] Table 66

[0566] Example 33

[0567] Figure 34 shows a schematic diagram of the structure of an optical lens according to Embodiment 33 of this application.

[0568] The difference from Embodiment 22 is that, in this embodiment, 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 seventh lens L7 is a concave-convex lens with positive optical power, its first side surface S13 is concave, and its second side surface S14 is convex.

[0569] Table 67 shows the basic parameters of the optical lens of Example 33. Table 68 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0570] Table 67

[0571] Table 68

[0572] Example 34

[0573] Figure 35 shows a schematic diagram of the structure of an optical lens according to Embodiment 34 of this application.

[0574] The difference from Embodiment 22 is that, in this embodiment, the fourth lens L4 is a convex-concave lens with negative optical power, and its first side surface S7 is convex and its second side surface S8 is concave.

[0575] Table 69 shows the basic parameters of the optical lens of Example 34. Table 70 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror S13-S14 in this example.

[0576] Table 69

[0577] Table 70

[0578] The optical lenses according to various embodiments of this application can all achieve high resolution. Specifically, each embodiment can meet, for example, a high resolution capability of 8M (eight million) pixels. Taking the optical lens of Embodiment 22 as an example, Figure 36 shows the MTF diagram of the optical lens according to Embodiment 22 of this application. MTF (Modulation Transfer Function) describes the ability of an optical system to "reproduce" the object side from the image side. As can be seen from Figure 36, the MTF value of the center field of view of the optical lens according to Embodiment 22 can exceed 0.71 at a spatial frequency of 119.00 lp / mm (119.00 line pairs / mm), and the optical lens given in Embodiment 22 has high resolution.

[0579] It should be noted that the optical lenses provided in Embodiments 22 to 34 of this application can all achieve good imaging quality, and their MTF (modulation transfer function) curve diagrams are quite similar. Therefore, this application only shows the MTF (modulation transfer function) curve diagram of the optical lens of Embodiment 22 by way of example, and the MTF (modulation transfer function) curve diagrams of the optical lenses 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.

[0580] In summary, the parameter values ​​in Examples 22 to 34 are shown in Tables 71 and 72 below, respectively. In these examples, the units of F, F1-F7, F56, H, D, ENPD, BFL, TTL, D, and D2 are all millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians.

[0581] Table 71

[0582] Table 72

[0583] Furthermore, Examples 22 to 34 respectively satisfy the relationships shown in Tables 73 and 74 below.

[0584] Table 73

[0585] Table 74

[0586] A second design aspect of 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. This 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.

[0587] 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, sequentially from the first side to the second side along the optical axis: A first lens with negative optical power has a first side surface that is convex and a second side surface that is concave. A second lens having optical power, wherein at least one side is concave; A third lens with positive optical power; A fourth lens with positive optical power has a convex first side and a convex second side. The fifth lens with negative optical power has a concave first side and a concave second side. A sixth lens with positive optical power, wherein its first side surface is convex and its second side surface is convex; and A seventh lens with optical power.

2. The optical lens of claim 1, wherein, The fourth lens, the fifth lens, and the sixth lens are cemented together, and the optical lens satisfies the following: R1 / TTL≤0.55, 0.11≤d3 / TTL≤0.25, 2≤|F2 / F|, 3≤|F7 / F|, 2≤F456 / F≤20, Wherein, F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, F7 is the effective focal length of the seventh lens, F456 is the combined focal length of the fourth, fifth and sixth lenses, d3 is the center thickness of the third lens, TTL is the total optical length of the optical lens, and R1 is the radius of curvature of the first side surface of the first lens.

3. The optical lens according to claim 1 or 2, characterized in that, The second lens has positive or negative optical power, and its first side surface is concave and its second side surface is convex.

4. The optical lens of any of claims 1 to 3, wherein, The second lens has negative optical power, and its first side surface is concave or convex, while its second side surface is concave.

5. The optical lens of any of claims 1 to 4, wherein, The third lens has a first side surface that is convex and a second side surface that is either convex or concave, or a first side surface that is concave and a second side surface that is convex.

6. The optical lens of any of claims 1 to 5, wherein, The seventh lens has positive or negative optical power, its first side is convex, and its second side is concave. Alternatively, the seventh lens may have negative optical power, with its first side surface being concave and its second side surface being concave.

7. The optical lens of any of claims 1 to 6, wherein, The optical lens satisfies the following condition: F3 / F≤7. Wherein, F is the total effective focal length of the optical lens, and F3 is the effective focal length of the third lens.

8. The optical lens of any of claims 1 to 7, wherein, The optical lens satisfies: FR1 / F≤5, Wherein, FR1 is the effective focal length of the first side of the first lens, and F is the total effective focal length of the optical lens.

9. The optical lens of any of claims 1 to 8, wherein, The optical lens satisfies: 0.01 ≤ d²³ / TTL ≤ 0.

25. Wherein, TTL is the total optical length of the optical lens, and d23 is the distance between the second lens and the third lens along the optical axis.

10. The optical lens of any of claims 1 to 9, wherein, The optical lens satisfies: 1.2 ≤ R1 / F ≤ 3.

5. Wherein, R1 is the radius of curvature of the first side surface of the first lens, and F is the total effective focal length of the optical lens.

11. The optical lens of any of claims 1 to 10, wherein, The optical lens satisfies: 4.5 ≤ TTL / F ≤ 9.

5. Wherein, TTL is the total optical length of the optical lens, and F is the total effective focal length of the optical lens.

12. The optical lens of any of claims 1 to 11, wherein, The optical lens satisfies: |(H-D14) / BFL|≤0.7, Wherein, H is the image height corresponding to the maximum field of view of the optical lens, D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens, and BFL is the optical back focal length of the optical lens.

13. The optical lens of any of claims 1 to 12, wherein, The optical lens satisfies the following condition: 45°≤(FOV×F) / H≤80°. Wherein, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

14. The optical lens of any of claims 1 to 13, wherein, The optical lens satisfies: 1.3 ≤ R1 / R2 ≤ 4. Wherein, R1 is the radius of curvature of the first side surface of the first lens, and R2 is the radius of curvature of the second side surface of the first lens.

15. The optical lens of any of claims 1 to 14, wherein, The optical lens satisfies the following condition: D / H / FOV x 1° ≤ 0.

025. Wherein, 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.

16. The optical lens of any of claims 1 to 15, wherein, The optical lens satisfies: 1.5≤(F4+F5+F6) / F≤4, Wherein, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens.

17. The optical lens of any of claims 1 to 16, wherein, The optical lens satisfies: |Sag31-Sag32| / d3≤0.4, Wherein, Sag31 is the sagitta of the first side of the third lens, Sag32 is the sagitta of the second side of the third lens, and d3 is the center thickness of the third lens.

18. The optical lens of any of claims 1 to 17, wherein, The optical lens satisfies: F3 / F456≤3. Wherein, F3 is the effective focal length of the third lens, and F456 is the combined focal length of the fourth, fifth, and sixth lenses.

19. The optical lens of any of claims 1 to 18, wherein, The optical lens satisfies: -3≤F1 / F≤-1, Wherein, F is the total effective focal length of the optical lens, and F1 is the effective focal length of the first lens.

20. The optical lens of any of claims 1 to 19, wherein, The optical lens satisfies: 0.13 ≤ d456 / TTL ≤ 0.

37. Wherein, d456 is the distance between the first side surface of the fourth lens and the second side surface of the sixth lens along the optical axis, and TTL is the total optical length of the optical lens.

21. The optical lens of any of claims 1 to 20, wherein, The optical lens satisfies: 0.1 ≤ d air gap / TTL ≤ 0.45 Wherein, d air gap is the sum of the air gaps between the first lens and the seventh lens, and TTL is the total optical length of the optical lens.

22. The optical lens of any of claims 1 to 21, wherein, The optical lens satisfies: -1.5≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.35, Wherein, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F456 is the combined focal length of the fourth lens, the fifth lens, and the sixth lens.

23. The optical lens of any of claims 1 to 22, wherein, The optical lens satisfies at least one of the following: 0.05≤BFL / TTL≤0.16, 0.4rad≤(F*θ) / D≤0.9rad, |F / R3|+|F / R4|≤2, F / ENPD≤2, d34 / TTL≤0.15, d67 / TTL≤0.

02. Wherein, F is the total effective focal length of the optical lens, BEL is the optical back focal length of the optical lens, TTL is the total optical length of the optical lens, θ is the radian value corresponding to 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, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, ENPD is the entrance pupil diameter of the optical lens, d34 is the distance between the third lens and the fourth lens along the optical axis, and d67 is the distance between the sixth lens and the seventh lens along the optical axis.

24. The optical lens of any of claims 1 to 23, wherein, The optical lens satisfies at least one of the following: 0.12≤d3 / TTL≤0.2, 0.5≤F3 / F≤5.5, 0.1≤R1 / TTL≤0.45, 1.75≤FR1 / F≤3.5, 0.015≤d23 / TTL≤0.2, 0.07≤BFL / TTL≤0.11, 1.5≤R1 / F≤3.2, 6≤TTL / F≤8.5, 0.5rad≤(F*θ) / D≤0.8rad, 0.01≤|(H-D14) / BFL|≤0.5, 48°≤(FOV×F) / H≤72°, 1.6≤R1 / R2≤3.5, 0.009≤D / H / FOVx1°≤0.022, 1.8≤(F4+F5+F6) / F≤3.2, 0.02≤|Sag31-Sag32| / d3≤0.25, 0.2≤|F / R3|+|F / R4|≤1.5, 1.75≤F / ENPD≤1.85, 0.05≤F3 / F456≤2.8, -2.8≤F1 / F≤-1.3, 2.5≤|F2 / F|≤140, 2.3≤F456 / F≤18, 3.5≤|F7 / F|≤125, 0.15≤d456 / TTL≤0.33, d34 / TTL≤0.1, 0.15≤dair gap / TTL≤0.37, -1.3≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.5, d67 / TTL≤0.016, Wherein, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, FR1 is the effective focal length of the first side of the first lens, F456 is the combined focal length of the fourth, fifth, and sixth lenses, TTL is the total optical length of the optical lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, FOV is 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. H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, Sag31 is the sagitta of the first side of the third lens, Sag32 is the sagitta of the second side of the third lens, d3 is the center thickness of the third lens, ENPD is the entrance pupil diameter of the optical lens, d23 is the distance between the second and third lenses along the optical axis, d34 is the distance between the third and fourth lenses along the optical axis, d67 is the distance between the sixth and seventh lenses along the optical axis, d456 is the distance between the first side of the fourth lens and the second side of the sixth lens along the optical axis, and d air gap is the sum of the air gaps between the first lens and the seventh lens.

25. The optical lens of any of claims 1 to 24, wherein, The optical lens satisfies at least one of the following: 0.125≤d3 / TTL≤0.185, 1.931≤F3 / F≤4.946, 0.225≤R1 / TTL≤0.430, 2.166≤FR1 / F≤3.188, 0.021≤d23 / TTL≤0.164, 0.080≤BFL / TTL≤0.103, 1.776≤R1 / F≤2.905, 6.752≤TTL / F≤8.245,0.597rad≤(F*θ) / D≤0.784rad,0.028≤|(H-D14) / BFL|≤0.410,52.208≤(FO V×F) / H≤66.076, 2.065≤R1 / R2≤3.181, 0.011≤D / H / FOVx1°≤0.019, 2.215≤(F4+F5+F6) / F≤2.999, 0.058≤|Sag31-Sag32| / d3≤0.195, 0.413≤|F / R3|+|F / R4|≤1.221, 0.146≤F3 / F456≤1.799, -2.629≤F1 / F≤-1.721, 3.761≤|F2 / F|≤89.128, 2.67≤F456 / F≤13.18 2, 5.805≤|F7 / F|≤80, 0.190≤d456 / TTL≤0.293, 0.003≤d34 / TTL≤0.087, 0.204≤dair gap / TTL≤0.335, -1.185≤(1 / F1+1 / F2) / (1 / F3+1 / F456)≤-0.682, 0.003≤d67 / TTL≤0.012, Wherein, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, F7 is the effective focal length of the seventh lens, FR1 is the effective focal length of the first side of the first lens, F456 is the combined focal length of the fourth, fifth, and sixth lenses, TTL is the total optical length of the optical lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, R3 is the radius of curvature of the first side of the second lens, R4 is the radius of curvature of the second side of the second lens, FOV is 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. H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, D14 is the maximum aperture of the second side of the seventh lens corresponding to the maximum field of view of the optical lens, BFL is the optical back focal length of the optical lens, Sag31 is the sagitta of the first side of the third lens, Sag32 is the sagitta of the second side of the third lens, d3 is the center thickness of the third lens, ENPD is the entrance pupil diameter of the optical lens, d23 is the distance between the second and third lenses along the optical axis, d34 is the distance between the third and fourth lenses along the optical axis, d67 is the distance between the sixth and seventh lenses along the optical axis, d456 is the distance between the first side of the fourth lens and the second side of the sixth lens along the optical axis, and d air gap is the sum of the air gaps between the first lens and the seventh lens.

26. An electronic device, comprising: It includes an optical lens as described in any one of claims 1 to 25, and includes an imaging element for converting an optical image formed by the optical lens into an electrical signal, or includes a light source.

27. An optical lens characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: A first lens with negative optical power has a first side surface that is convex and a second side surface that is concave. A second lens with negative optical power has a concave first side surface; A third lens with positive optical power; The fourth lens, which has optical power, has a convex first side surface; A fifth lens with optical power; A sixth lens with optical power; and A seventh lens with optical power.

28. The optical lens of claim 27, wherein, The fifth lens is cemented to the sixth lens, and the fifth lens and the sixth lens have opposite optical power properties; The optical lens has seven lenses with optical power. The optical lens satisfies: 0.03≤(d5+d6) / TTL≤0.2; 2≤|F7 / F|; -5≤R4 / R5≤0.8; -25≤F2 / F≤-2; 0.06≤d45 / TTL≤0.2; as well as TTL / F≤4.5; Wherein, d5 is the center thickness of the fifth lens on the optical axis, d6 is the center thickness of the sixth 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, F7 is the effective focal length of the seventh lens, F is the total effective focal length of the optical lens, R4 is the radius of curvature of the second side of the second lens, R5 is the radius of curvature of the first side of the third lens, F2 is the effective focal length of the second lens, and d45 is the air gap between the fourth lens and the fifth lens on the optical axis.

29. The optical lens of claim 27, wherein, The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy the following condition: 1.5≤F3 / F≤8.

30. The optical lens of claim 27 or 28, wherein, The distance BFL from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface on the optical axis satisfy: BFL / TTL≤0.

15.

31. The optical lens of any of claims 27-30, wherein, The air gap d67 between the sixth lens and the seventh lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following condition: 0.05≤d67 / TTL≤0.

2.

32. The optical lens of any of claims 27-31, wherein, The image height H corresponding to the maximum field of view of the optical lens, the total effective focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: |(HF×θ) / (F×θ)|≤0.

1.

33. The optical lens of any of claims 27-32, wherein, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy: -0.5≤R3 / R4≤2.

34. The optical lens of any of claims 27-33, wherein, The maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50 ≤ (FOV × F) / H ≤ 75.

35. The optical lens of any of claims 27-34, wherein, The maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total effective focal length F of the optical lens satisfy: 0.1≤D / H / F≤0.

25.

36. The optical lens of any of claims 27-35, wherein, The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: -2.8≤F1 / F≤-1.

37. The optical lens of any of claims 27-36, wherein, The total effective focal length F of the optical lens and the effective focal length F4 of the fourth lens satisfy the following condition: -1≤F / F4≤1.

5.

38. The optical lens of any of claims 27-37, wherein, The center thickness d2 of the second lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.005≤d2 / TTL≤0.

12.

39. The optical lens of any of claims 27-38, wherein, The air gap d23 between the second lens and the third lens on the optical axis, the air gap d34 between the third lens and the fourth lens on the optical axis, and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: (d23+d34) / TTL≤0.

1.

40. The optical lens of any of claims 27-39, wherein, The air gap d23 between the second lens and the third lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d23 / TTL≤0.

08.

41. The optical lens of any of claims 27-40, wherein, The air gap d34 between the third lens and the fourth lens on the optical axis and the distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d34 / TTL≤0.

01.

42. The optical lens of any of claims 27-41, wherein, The total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.7≤F / H≤0.

95.

43. The optical lens of any of claims 27-42, wherein, The radius of curvature R7 of the first side of the fourth lens and the total effective focal length F of the optical lens satisfy the following condition: 0.5≤R7 / F≤2.

5.

44. The optical lens of any of claims 27-43, wherein, The optical lens satisfies at least one of the following conditions: -3≤R11 / F≤1.5; -8≤F5 / F6≤-0.1; (R1 / D) / (R2 / D2)≤9; F / ENPD≤2; 1.8≤R1 / F≤8.5; -10≤R6 / R7≤25; 0.5≤F56 / F≤30; Wherein, R11 is the radius of curvature of the second side surface of the fifth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side surface of the first lens, R2 is the radius of curvature of the second side surface of the first lens, D is the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, D2 is the maximum effective aperture of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side surface of the third lens, R7 is the radius of curvature of the first side surface of the fourth lens, and F56 is the combined focal length of the fifth and sixth lenses.

45. The optical lens of any of claims 27-44, wherein, The optical lens satisfies at least one of the following conditions: 0.09≤(d5+d6) / TTL≤0.16; 2≤|F7 / F|≤80; 2.2≤|F7 / F|≤55; -4≤R4 / R5≤0.6; -20≤F2 / F≤-2.5; 0.07≤d45 / TTL≤0.18; 3.5≤TTL / F≤4.3; 1.7≤ F3 / F≤6.5; 0.08≤BFL / TTL≤0.13; 0.06≤d67 / TTL≤0.15; 0.002≤|(HF×θ) / (F×θ)|≤0.08; -0.3≤R3 / R4≤1.2; 55≤(FOV×F) / H≤65; 0.12≤D / H / F ≤0.19; -2.2≤F1 / F≤-1.2; -0.5≤F / F4≤1; 0.01≤d2 / TTL≤0.09; (d23+d34) / TTL≤0.06; d23 / TTL≤0.06; d34 / TTL≤0.005; 0.75≤F / H≤0.9; 0. 7≤R7 / F≤1.8; -2≤R11 / F≤1; -6≤F5 / F6≤-0.2; 1.25≤(R1 / D) / (R2 / D2)≤7.75; 1.7≤F / ENPD≤1.9; 2≤R1 / F≤8; -7≤R6 / R7≤-0.5; 0.7≤F56 / F≤24; Wherein, F3 is the effective focal length of the third lens, BFL is the distance from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis, d67 is the air gap between the sixth and seventh lenses on the optical axis, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, R3 is the radius of curvature of the first side of the second lens, FOV is the maximum field of view of the optical lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, d2 is the center thickness of the second lens on the optical axis, and d23 is the second The air gap between the lens and the third lens on the optical axis, d34 is the air gap between the third lens and the fourth lens on the optical axis, R7 is the radius of curvature of the first side of the fourth lens, R11 is the radius of curvature of the second side of the fifth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side of the third lens, and F56 is the combined focal length of the fifth and sixth lenses.

46. The optical lens of any of claims 27-45, wherein, The optical lens satisfies at least one of the following conditions: 0.1081≤(d5+d6) / TTL≤0.1505;2.6553≤|F7 / F|≤34.7521;-2.7008≤R4 / R5≤0.3174;-14.9343≤F2 / F≤-3.0069;0.0806≤d45 / TTL≤0.1501;3.8753≤TTL / F≤4.1300;1.8948≤F3 / F≤4.9664;0.0920≤BFL / TTL≤0.1209;0.0710≤d67 / TTL≤0.1247;0.0039≤|(H-F×θ) / (F×θ)|≤0.0558;-0.0605≤R3 / R4≤0.8217;57.0731≤(FOV×F) / H≤60.6826;0.1434≤D / H / F≤0.1808;-1.9572≤F1 / F≤-1.3275;-0.1922≤F / F4≤0.7230;0.0250≤d2 / TTL≤0.0759;0.0065≤(d23+d34) / TTL≤0.0428;0.0032≤d23 / TTL≤0.0397;0.0031≤d34 / TTL≤0.0032;0.8142≤F / H≤0.8657; 0.9915≤R7 / F≤1.6721;-1.5128≤R11 / F≤0.6900;-3.7543≤F5 / F6≤-0.2725;2.5211≤(R1 / D) / (R2 / D2)≤6.4461;1.8000≤F / ENPD≤1.8200;2.2309≤R1 / F≤5.8821;-5.5184≤R6 / R7≤17.6805;0.9904≤F56 / F≤19.2509; Wherein, F3 is the effective focal length of the third lens, BFL is the distance from the center of the second side of the seventh lens to the imaging surface of the optical lens on the optical axis, d67 is the air gap between the sixth and seventh lenses on the optical axis, H is the image height corresponding to the maximum field of view of the optical lens, θ is the radian value of the maximum field of view of the optical lens, R3 is the radius of curvature of the first side of the second lens, FOV is the maximum field of view of the optical lens, D is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, F1 is the effective focal length of the first lens, F4 is the effective focal length of the fourth lens, d2 is the center thickness of the second lens on the optical axis, and d23 is the second The air gap between the lens and the third lens on the optical axis, d34 is the air gap between the third lens and the fourth lens on the optical axis, R7 is the radius of curvature of the first side of the fourth lens, R11 is the radius of curvature of the second side of the fifth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, R1 is the radius of curvature of the first side of the first lens, R2 is the radius of curvature of the second side of the first lens, D2 is the maximum effective aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens, ENPD is the entrance pupil diameter of the optical lens, R6 is the radius of curvature of the second side of the third lens, and F56 is the combined focal length of the fifth and sixth lenses.

47. An electronic device, comprising: Including the optical lens according to any one of claims 27 to 46, and, It also includes an imaging element for converting the optical image or optical information formed by the optical lens into an electrical signal, the imaging element being located on the second side of the optical lens, and light from the first side being imaged on the second side after passing through the optical lens; Alternatively, it may also include a light source located on the second side of the optical lens, the light emitted by the light source being projected onto the first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side.

Images