Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side along an optical axis, a first lens with negative optical power, the first side of the first lens being a convex surface and the second side being a concave surface; a second lens with optical power, the first side of the second lens being a concave surface and the second side being a convex surface; a third lens with positive optical power, the first side of the third lens being a convex surface; a fourth lens with positive optical power, the first side of the fourth lens being a convex surface and the second side being a convex surface; a fifth lens with negative optical power, the first side of the fifth lens being a concave surface; a sixth lens with positive optical power, the second side of the sixth lens being a convex surface; and a seventh lens with optical power. The application solves the problem that the optical lens in the prior art cannot simultaneously have high resolution, good temperature performance, high light throughput and small size.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical lens and an electronic device. Background Technology

[0002] In recent years, with the development of technology, the demand for optical lenses in daily life has been increasing, and optical lenses are being applied to more and more scenarios. For example, in the automotive industry, for driving safety, more accurate detection of the driving environment is required, and optical lenses have become key components for detecting information around the car. At the same time, with the rapid development of autonomous driving assistance systems, the number of optical lenses used in automobiles is gradually increasing.

[0003] However, existing optical lenses have various problems. For example, in order to reduce costs and make them lighter, existing optical lenses cause problems such as unclear images under high and low temperatures; and the optical system has poor thermal stability, and the resolution is difficult to meet requirements after returning from high temperature to room temperature.

[0004] Some optical lenses, while achieving megapixel resolution, suffer from significant aberrations such as chromatic aberration, astigmatism, and distortion, making it difficult to guarantee image quality. Furthermore, current optical lenses have limited light-gathering capabilities, making them less suitable for low-light environments such as nighttime or rainy days, or struggling to achieve both high light throughput and overall miniaturization. Additionally, some optical lenses, while capable of short focal lengths, often experience a decrease in resolution at wide angles, while exhibiting a relatively high angular resolution in the center area, resulting in more prominent image quality in that region.

[0005] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve high resolution, good temperature performance, high light transmission, and miniaturization. Summary of the Invention

[0006] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that existing optical lenses cannot simultaneously achieve high resolution, good temperature performance, high light transmission, and miniaturization.

[0007] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, 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 of the first lens is convex and a second side surface is concave; a second lens having optical power, wherein a first side surface of the second lens is concave and a second side surface is convex; a third lens having positive optical power, wherein a first side surface of the third lens is convex; a fourth lens having positive optical power, wherein a first side surface of the fourth lens is convex and a second side surface is convex; a fifth lens having negative optical power, wherein a first side surface of the fifth lens is concave; a sixth lens having positive optical power, wherein a second side surface of the sixth lens is convex; and a seventh lens having optical power.

[0008] Furthermore, the second lens has negative optical power; or the second lens has positive optical power.

[0009] Furthermore, the second side surface of the third lens is convex; or the second side surface of the third lens is concave.

[0010] Furthermore, the second side surface of the fifth lens is concave; or the second side surface of the fifth lens is convex.

[0011] Furthermore, the first side surface of the sixth lens is convex; or the first side surface of the sixth lens is concave.

[0012] Furthermore, the seventh lens has 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; or the seventh lens has positive optical power, with its first side being convex and its second side being convex.

[0013] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens; and / or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspherical lenses.

[0014] Furthermore, the optical lens also includes an aperture stop disposed between the third lens and the fourth lens; and / or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with a recurve.

[0015] Furthermore, the maximum field of view (FOV) of the optical lens, the total 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 relationship: (FOV×F) / H≤80.

[0016] Furthermore, the maximum field of view (FOV) of the optical lens, the total 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 relationship: 30 ≤ (FOV × F) / H ≤ 70.

[0017] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: TTL / H / θ≤2.

[0018] Furthermore, the maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: D / H / θ≤0.9.

[0019] Furthermore, the total 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: F / H≤0.8.

[0020] Furthermore, the aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: DST / F≤1.5.

[0021] Furthermore, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 15≤arctan(1 / K(S2)) / F.

[0022] Furthermore, the angle arctan(1 / K(S2)) of the second side of the first lens satisfies the following relationship with the total focal length F of the optical lens: 15≤arctan(1 / K(S2)) / F≤40.

[0023] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 0.5≤(H / 2) / (F*tan(θ / 2))≤0.9.

[0024] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: (d8+d9) / TTL≤0.4.

[0025] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.08≤(d8+d9) / TTL≤0.3.

[0026] Furthermore, the central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following relationship: 0 <R3 / R4≤2.5。

[0027] Furthermore, the central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens satisfy the following condition: 0.25≤R3 / R4≤2.

[0028] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 5≤|F2 / F|.

[0029] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8 ≤ |F2 / F|.

[0030] Furthermore, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: R1 / F≤5.

[0031] Furthermore, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: R1 / F≤3.

[0032] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL≤0.35.

[0033] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL≤0.2.

[0034] Furthermore, the total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: F / BFL≤3.

[0035] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -20≤F6 / F7≤-0.15.

[0036] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.3.

[0037] Furthermore, the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: R1 / R2≤6.

[0038] Furthermore, the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 0.5≤R1 / R2≤5.

[0039] Furthermore, the central curvature radius R6 of the second side surface of the third lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: 0.5 ≤ |R6 / R5|.

[0040] Furthermore, the central curvature radius R6 of the second side surface of the third lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: 0.8 ≤ |R6 / R5|.

[0041] Furthermore, the central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.7≤|R7 / R8|≤3.

[0042] Furthermore, the central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.85≤|R7 / R8|≤2.5.

[0043] Furthermore, the central curvature radius R4 of the second side surface of the second lens and the central curvature radius R5 of the first side surface of the third lens satisfy the condition: R4 / R5<0.

[0044] Furthermore, the central curvature radius R4 of the second side surface of the second lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: -5≤R4 / R5≤-0.2.

[0045] Furthermore, the central curvature radius R10 of the second side surface of the fifth lens and the central curvature radius R9 of the first side surface of the fifth lens satisfy the following condition: 1.5 ≤ |R10 / R9|.

[0046] Furthermore, the central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.5 ≤ |R10 / F|.

[0047] Furthermore, the central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤|R10 / F|.

[0048] Furthermore, the total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: F / TTL≤0.35.

[0049] According to another aspect of the present invention, an optical lens is also provided, comprising, in sequence along the optical axis from a first side to a second side: a first lens having negative optical power; a second lens having optical power; a third lens having positive optical power; a fourth lens having positive optical power; a fifth lens having negative optical power; a sixth lens having positive optical power; and a seventh lens having optical power; wherein the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 15 ≤ arctan(1 / K(S2)) / F.

[0050] Furthermore, the first side surface of the first lens is convex, and the second side surface is concave.

[0051] Furthermore, the second lens has negative optical power, with a first side surface that is concave and a second side surface that is convex; or the second lens has positive optical power, with a first side surface that is concave and a second side surface that is convex.

[0052] Furthermore, the first side surface of the third lens is convex, and the second side surface is convex; or the first side surface of the third lens is convex, and the second side surface is concave.

[0053] Furthermore, the first side surface of the fourth lens is convex, and the second side surface is convex.

[0054] Furthermore, the first side surface of the fifth lens is concave, and the second side surface is concave; or the first side surface of the fifth lens is concave, and the second side surface is convex.

[0055] Furthermore, the first side surface of the sixth lens is convex, and the second side surface is convex; or the first side surface of the sixth lens is concave, and the second side surface is convex.

[0056] Furthermore, the seventh lens has 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; or the seventh lens has positive optical power, with its first side being convex and its second side being convex.

[0057] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens; or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all aspherical lenses.

[0058] Furthermore, the optical lens also includes an aperture stop, which is disposed between the third lens and the fourth lens; or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with a recurve.

[0059] Furthermore, the maximum field of view (FOV) of the optical lens, the total 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 relationship: (FOV×F) / H≤80.

[0060] Furthermore, the maximum field of view (FOV) of the optical lens, the total 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 relationship: 30 ≤ (FOV × F) / H ≤ 70.

[0061] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: TTL / H / θ≤2.

[0062] Furthermore, the maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: D / H / θ≤0.9.

[0063] Furthermore, the total 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: F / H≤0.8.

[0064] Furthermore, the aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: DST / F≤1.5.

[0065] Furthermore, the angle arctan(1 / K(S2)) of the second side of the first lens satisfies the following relationship with the total focal length F of the optical lens: 15≤arctan(1 / K(S2)) / F≤40.

[0066] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 0.5≤(H / 2) / (F*tan(θ / 2))≤0.9.

[0067] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: (d8+d9) / TTL≤0.4.

[0068] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.08≤(d8+d9) / TTL≤0.3.

[0069] Furthermore, the central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following relationship: 0 <R3 / R4≤2.5。

[0070] Furthermore, the central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens satisfy the following condition: 0.25≤R3 / R4≤2.

[0071] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 5≤|F2 / F|.

[0072] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8 ≤ |F2 / F|.

[0073] Furthermore, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: R1 / F≤5.

[0074] Furthermore, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: R1 / F≤3.

[0075] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL≤0.35.

[0076] Furthermore, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL≤0.2.

[0077] Furthermore, the total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: F / BFL≤3.

[0078] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -20≤F6 / F7≤-0.15.

[0079] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.3.

[0080] Furthermore, the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: R1 / R2≤6.

[0081] Furthermore, the central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 0.5≤R1 / R2≤5.

[0082] Furthermore, the central curvature radius R6 of the second side surface of the third lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: 0.5 ≤ |R6 / R5|.

[0083] Furthermore, the central curvature radius R6 of the second side surface of the third lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: 0.8 ≤ |R6 / R5|.

[0084] Furthermore, the central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.7≤|R7 / R8|≤3.

[0085] Furthermore, the central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.85≤|R7 / R8|≤2.5.

[0086] Furthermore, the central curvature radius R4 of the second side surface of the second lens and the central curvature radius R5 of the first side surface of the third lens satisfy the condition: R4 / R5<0.

[0087] Furthermore, the central curvature radius R4 of the second side surface of the second lens and the central curvature radius R5 of the first side surface of the third lens satisfy the following condition: -5≤R4 / R5≤-0.2.

[0088] Furthermore, the central curvature radius R10 of the second side surface of the fifth lens and the central curvature radius R9 of the first side surface of the fifth lens satisfy the following condition: 1.5 ≤ |R10 / R9|.

[0089] Furthermore, the central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.5 ≤ |R10 / F|.

[0090] Furthermore, the central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤|R10 / F|.

[0091] Furthermore, the total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: F / TTL≤0.35.

[0092] According to another aspect of the present invention, an electronic device is also provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0093] Applying the technical solution of this invention, the optical lens sequentially includes, from the first side to the second side along the optical axis, a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with optical power. The first lens has a convex first side and a concave second side; the second lens has a concave first side and a convex second side; the third lens has a convex first side; the fourth lens has a convex first side and a convex second side; the fifth lens has a concave first side; and the sixth lens has a convex second side.

[0094] The first lens has negative optical power. Its first side is convex, and its second side is concave. This design maximizes the collection of light from a large field of view into the rear optical system, increasing light transmission and fixing the direction of large-angle light rays at the edges. The convex first side facilitates the sliding of water droplets in practical environments such as rain and snow, reducing their impact on imaging. The concave second side reduces the height of the emitted light rays, allowing for a smaller aperture and miniaturization. The meniscus shape of the first lens further enhances resolution in small fields of view, redistributes image height, and achieves special central distortion.

[0095] The second lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the second lens has negative optical power, it facilitates the smooth reception of light entering through the first lens, allowing for smooth divergence and transition. The concave first side of the second lens allows the light transmitted from the first lens to continue diverging after passing through it, resulting in slower convergence at the rear and an upward trend in the peripheral field of view. This design is beneficial for pairing with large chips. When the second lens has positive optical power, it converges light. Under the same field of view, the convex shape on the second side helps to appropriately converge the light, reducing loss at large angles. Simultaneously, the convex second side of the second lens, combined with the convex first side of the third lens, allows light exiting the second lens to smoothly enter the first side of the third lens, facilitating a smooth transition, reducing light loss, improving illumination in the peripheral field of view, and altering the trajectory of peripheral light. This allows for a reduction in the front aperture of the optical lens, reducing its size and contributing to miniaturization and cost reduction.

[0096] The third lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. When the second side is convex, the lens is biconvex with a gentle shape. Combined with positive optical power, this minimizes the impact of large temperature changes on the focal length of the third lens, helping the entire optical system maintain stable performance over a wide temperature range. The convex shape of the third lens, combined with the concave shape of the second lens, facilitates a smooth transition of light into the rear lens, improving resolution. When the second side of the third lens is concave, the positive optical power and the convex first side receive light from the second lens, smoothing the light path and reducing higher aberrations. The concave second side alters the light's exit trajectory, allowing diverging light to smoothly enter the rear lens and uniformly incident on the fourth lens, resulting in a large image area and high resolution.

[0097] The fourth lens has positive optical power. Both its first and second sides are convex. This positive optical power converges light rays, allowing them to converge more smoothly onto the image plane. This improves astigmatism and field curvature, enhancing the resolving power of the optical system. The fourth lens is biconvex with similar radii of curvature on both sides, ensuring that diverging light rays converge smoothly and enter the image more easily, further smoothing the transition of light paths.

[0098] The fifth lens has negative optical power. Its first side is concave, while the second lens can be either concave or convex. When the second side of the fifth lens is concave, combined with negative optical power, it facilitates a smooth transition of the optical path difference between the peripheral and central fields of view. The fifth lens is biconcave, especially with its first side being concave, resulting in a significant light reversal after emission. This clearly distinguishes the peripheral and central rays in each field of view, altering the trend of the peripheral rays and facilitating aberration correction between the central and peripheral rays, thus contributing to high resolution. When the second side of the fifth lens is convex, its negative optical power and smooth light path improve astigmatism and field curvature, enhancing the resolving power of the optical system. The concave-convex shape of the fifth lens, with its gentle curve, minimizes the impact of large temperature variations on its focal length, helping the entire optical system maintain stable performance over a wide temperature range. The convex second side of the fifth lens also increases the cone angle of light reaching the imaging plane and reduces the angle of incidence of the principal ray.

[0099] The sixth lens has positive optical power. Its first side can be either convex or concave, while its second side is convex. When the first side of the sixth lens is convex, it has positive optical power and a gently sloping surface, allowing diverging light rays to smoothly enter the rear, further smoothing the light path and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system. When the first side of the sixth lens is concave, its positive focal length, combined with the negative focal length of the fifth lens, helps to collect light rays entering through the fifth lens, resulting in a smoother light path. A concave first side allows light rays from the fifth lens to continue diverging after passing through it, resulting in slower convergence at the rear and an upward trend in the edge field of view. This design, when paired with the first two lenses, is beneficial for integration with large optical chips.

[0100] The seventh lens can have either positive or negative optical power. When the seventh lens has negative optical power, it collects the light rays emitted through the sixth lens, which helps to appropriately diverge the light rays in front, matching the large chip. When the seventh lens has positive optical power, it helps to control the angle of light incident on the chip, improving resolution quality.

[0101] This application employs seven lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focal length, large angular resolution in the central region, and high luminous flux. Attached Figure Description

[0102] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0103] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0104] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0105] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0106] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0107] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0108] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0109] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0110] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown;

[0111] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0112] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the invention is shown;

[0113] Figure 11 A schematic diagram of the structure of the optical lens of Example Eleven of the Invention is shown;

[0114] Figure 12 A schematic diagram of the structure of the optical lens of Example Twelve of the present invention is shown.

[0115] The above figures include the following reference numerals:

[0116] L1, First lens; S1, First side surface of the first lens; S2, Second side surface of the first lens; L2, Second lens; S3, First side surface of the second lens; S4, Second side surface of the second lens; L3, Third lens; S5, First side surface of the third lens; S6, Second side surface of the third lens; STO, Aperture stop; L4, Fourth lens; S8, First side surface of the fourth lens; S9, Second side surface of the fourth lens; L5, Fifth lens; S9, First side surface of the fifth lens; S10, Second side surface of the fifth lens; L6, Sixth lens; S11, First side surface of the sixth lens; S12, Second side surface of the sixth lens; L7, Seventh lens; S13, First side surface of the seventh lens; S14, Second side surface of the seventh lens; S15, First side surface of the protective glass; S16, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0117] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0118] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0119] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0120] 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.

[0121] 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 drawn strictly to scale.

[0122] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0123] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0124] In an exemplary embodiment, the optical lens provided in this application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side, and the right side is the image side; the first side is also the object side, and the second side is also the image side. Light rays from the object side can form an image on the image side.

[0125] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0126] To address the challenge of simultaneously achieving high resolution, excellent temperature performance, high light transmission, and miniaturization in existing optical lenses, this invention provides an optical lens and an electronic device.

[0127] Example 1

[0128] like Figures 1 to 12 As shown, the optical lens, along the optical axis from the first side to the second side, sequentially includes a first lens with negative optical power, a second lens with optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with optical power. The first lens has a convex first side and a concave second side; the second lens has a concave first side and a convex second side; the third lens has a convex first side; the fourth lens has a convex first side and a convex second side; the fifth lens has a concave first side; and the sixth lens has a convex second side.

[0129] The first lens has negative optical power, with a convex first side and a concave second side. This design maximizes the collection of light from a wide field of view into the rear optical system, increasing light transmission and fixing the direction of large-angle light rays at the edges. The convex first side facilitates the sliding of water droplets in real-world environments such as rain or snow, reducing their impact on imaging. The concave second side reduces the height of the emitted light rays, allowing for a smaller aperture and miniaturization. The meniscus shape of the first lens increases resolution in narrower fields of view, redistributes image height, and achieves specific central distortion. Furthermore, the first lens is preferably an aspherical lens, further improving image quality. The aforementioned narrow field of view refers to a field of view of 0° to 20°.

[0130] The second lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the second lens has negative optical power, it facilitates the smooth reception of light entering through the first lens, allowing for smooth divergence and transition. The concave first side of the second lens allows the light transmitted from the first lens to continue diverging after passing through it, resulting in slower convergence at the rear and an upward trend in the peripheral field of view. This design is beneficial for pairing with large chips. When the second lens has positive optical power, it converges light. Under the same field of view, the convex shape on the second side helps to appropriately converge the light, reducing loss at large angles. Simultaneously, the convex second side of the second lens, combined with the convex first side of the third lens, allows light exiting the second lens to smoothly enter the first side of the third lens, facilitating a smooth transition, reducing light loss, improving illumination in the peripheral field of view, and altering the trajectory of peripheral light. This allows for a reduction in the front aperture of the optical lens, reducing its size and contributing to miniaturization and cost reduction.

[0131] The third lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. When the second side is convex, the lens is biconvex with a gentle shape. Combined with positive optical power, this minimizes the impact of large temperature changes on the focal length of the third lens, helping the entire optical system maintain stable performance over a wide temperature range. The convex shape of the third lens, combined with the concave shape of the second lens, facilitates a smooth transition of light into the rear lens, improving resolution. When the second side of the third lens is concave, the positive optical power and the convex first side receive light from the second lens, smoothing the light path and reducing higher aberrations. The concave second side alters the light's exit trajectory, allowing diverging light to smoothly enter the rear lens and uniformly incident on the fourth lens, resulting in a large image area and high resolution.

[0132] The fourth lens has positive optical power. Both its first and second sides are convex. This positive optical power converges light rays, allowing them to converge more smoothly onto the image plane. This improves astigmatism and field curvature, enhancing the resolving power of the optical system. The fourth lens is biconvex with similar radii of curvature on both sides, ensuring that diverging light rays converge smoothly and enter the image more easily, further smoothing the transition of light paths.

[0133] The fifth lens has negative optical power. Its first side is concave, while the second lens can be either concave or convex. When the second side of the fifth lens is concave, combined with negative optical power, it facilitates a smooth transition of the optical path difference between the peripheral and central fields of view. The fifth lens is biconcave, especially with its first side being concave, resulting in a significant light reversal after emission. This clearly distinguishes the peripheral and central rays in each field of view, altering the trend of the peripheral rays and facilitating aberration correction between the central and peripheral rays, thus contributing to high resolution. When the second side of the fifth lens is convex, its negative optical power and smooth light path improve astigmatism and field curvature, enhancing the resolving power of the optical system. The concave-convex shape of the fifth lens, with its gentle curve, minimizes the impact of large temperature variations on its focal length, helping the entire optical system maintain stable performance over a wide temperature range. The convex second side of the fifth lens also increases the cone angle of light reaching the imaging plane and reduces the angle of incidence of the principal ray.

[0134] The sixth lens has positive optical power. Its first side can be either convex or concave, while its second side is convex. When the first side of the sixth lens is convex, it has positive optical power and a gently sloping surface, allowing diverging light rays to smoothly enter the rear, further smoothing the light path and improving astigmatism and field curvature, thus enhancing the resolving power of the optical system. When the first side of the sixth lens is concave, its positive focal length, combined with the negative focal length of the fifth lens, helps to collect light rays entering through the fifth lens, resulting in a smoother light path. A concave first side allows light rays from the fifth lens to continue diverging after passing through it, resulting in slower convergence at the rear and an upward trend in the edge field of view. This design, when paired with the first two lenses, is beneficial for integration with large optical chips.

[0135] The seventh lens can have either positive or negative optical power. When the seventh lens has negative optical power, it collects the light rays emitted through the sixth lens, which helps to appropriately diverge the light rays in front, matching the large chip. When the seventh lens has positive optical power, it helps to control the angle of light incident on the chip, improving resolution quality.

[0136] This application employs seven lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focal length, large angular resolution in the central region, and high luminous flux.

[0137] In this embodiment, the second lens has a negative optical power. This arrangement facilitates the smooth divergence of light rays entering through the first lens, ensuring a smooth transition of light.

[0138] In this embodiment, the second lens has positive optical power. It has a converging effect on light rays, and under the same field of view, its convex shape towards the second side helps to properly converge light rays and reduce the loss of light rays at large angles.

[0139] In this embodiment, the second side surface of the third lens is convex. Its biconvex shape and gently sloping lens shape, combined with positive optical power, minimize the impact of large temperature variations on the focal length of the third lens, thus helping the entire optical system maintain stable performance over a wide temperature range. The convex-convex shape of the third lens, combined with the concave-convex shape of the second lens, facilitates a smooth transition of light into the rear lens, improving resolution.

[0140] In this embodiment, the second side surface of the third lens is concave. Combined with the positive optical power and the convex first side surface, it receives light from the second lens, making the light path smooth and reducing the generation of higher aberrations. The concave second side surface alters the light emission path, allowing diverging light to smoothly enter the rear and uniformly incident on the fourth lens, which is beneficial for obtaining a large image area and high resolution.

[0141] In this embodiment, the second side of the fifth lens is concave. Combined with negative optical power, this facilitates a smooth transition of the optical path difference between the edge and central fields of view. The fifth lens is biconcave, especially the first side, which causes a significant light reversal after emission. This clearly distinguishes the edge rays from the central rays in each field of view, altering the trend of the edge rays and facilitating aberration correction between the central and edge rays in each field of view, thus contributing to high resolution.

[0142] In this embodiment, the second side surface of the fifth lens is convex. The fifth lens has negative optical power, and the light path is stable, which can improve astigmatism and field curvature in imaging, and improve the resolving power of the optical system. The fifth lens has a concave-convex shape, and the lens shape is relatively flat. Large temperature changes have little impact on the focal length of the fifth lens, which is beneficial for the entire optical system to maintain stable performance over a large temperature range. The convex shape of the second side surface of the fifth lens helps to increase the cone angle when the light reaches the imaging plane and reduce the incident angle of the principal ray.

[0143] In this embodiment, the first side surface of the sixth lens is convex. With positive optical power and a convex-convex surface with a gentle shape, diverging light rays can smoothly enter the rear, further smoothing the light path transition. This can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system.

[0144] In this embodiment, the first side surface of the sixth lens is concave. The positive focal length of the sixth lens, combined with the negative focal length of the fifth lens, facilitates the collection of light rays entering through the fifth lens, resulting in a smooth transition of light path. The concave first side surface of the sixth lens allows the light rays transmitted from the fifth lens to continue diverging after passing through it, resulting in slower convergence of light rays at the rear end and an upward trend in the edge field of view. This design, combined with the first two lenses, is beneficial for integration with large chips.

[0145] In this embodiment, the seventh lens has negative optical power, with its first side being convex and its second side being concave. This facilitates the smooth entry of light into the imaging plane, improving resolution; simultaneously, it allows for sufficient correction of various aberrations in the optical system, thereby improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure.

[0146] In this embodiment, the seventh lens has negative optical power, and both its first and second sides are concave. The negative optical power of the seventh lens collects the light rays emitted from the biconvex lens of the sixth lens, which helps to appropriately diverge the forward light, matching the large chip. The concave first side of the seventh lens allows the light rays in the edge field of view to have a longer optical path than those in the center field of view, altering the light trajectory of the edge field of view and making it more concentrated when reaching the imaging plane. This defocusing corrects edge field-of-view aberrations, achieving high resolution.

[0147] In this embodiment, the seventh lens has positive optical power, and both its first and second sides are convex. The positive optical power and the double-convex design of the seventh lens help control the angle at which light enters the chip, thus improving image resolution.

[0148] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented doublet lens. The use of a cemented doublet lens effectively corrects chromatic aberration, reduces the overall lens length, and allows light to transition smoothly to the rear system, thus optimizing the optical system's CRA, illumination, and distortion performance. The fourth lens has positive optical power, collecting light rays entering through it and ensuring a smooth transition to the rear, reducing the height of incident light rays. The fifth lens has negative optical power, clearly distinguishing the edge and center rays in each field of view, which is beneficial for aberration correction between the center and edge rays in each field of view and for achieving high resolution. The fifth lens uses a high-refractive-index, low-Abbe-number material, while the fourth lens uses a relatively low-refractive-index, high-Abbe-number material. The cementation of these two materials effectively corrects chromatic aberration in the optical system. This also reduces the number of assembly components between the fourth and fifth lenses, which helps reduce processes, overall weight, and costs. Furthermore, it reduces light loss caused by inter-lens reflections, improving image illumination and minimizing ghosting. Because light transitions smoothly through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, thus reducing tolerance sensitivity during lens assembly. This allows for a more efficient allocation of focal length, and the fact that both lenses are made of glass facilitates thermal compensation, improving lens performance at different temperatures.

[0149] In this embodiment, the first lens, second lens, fourth lens, fifth lens, sixth lens, and seventh lens are all aspherical lenses. By appropriately setting the aspherical lenses, it is beneficial to have a large angular resolution in the central region, thereby improving image resolution; it is also beneficial to improve field curvature and astigmatism, thereby enhancing resolving power.

[0150] In this embodiment, the optical lens also includes an aperture stop, which is positioned between the third lens and the fourth lens. This arrangement facilitates the effective focusing of light entering the optical system, reduces the lens aperture at the rear of the optical system, and lowers the system's assembly sensitivity.

[0151] In this embodiment, at least one of the first lens, second lens, fifth lens, sixth lens, and seventh lens is inverted. Selecting inverted elements for some lenses helps balance aberrations and improve resolution.

[0152] In this embodiment, the maximum field of view (FOV) of the optical lens, the total 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 condition: (FOV×F) / H≤80. Satisfying this condition means that, with a fixed image height, a smaller focal length results in a larger field of view, which not only affects the imaging effect in the central region of the optical lens but also affects the distortion of the peripheral field of view; a larger focal length affects the imaging effect of the peripheral field of view and the overall performance of the optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited to a reasonable range, thereby improving the resolving power of the optical lens while satisfying the requirements of short focal length, large target area, and large image height. Preferably, 30≤(FOV×F) / H≤70. This setting, with a fixed image height, results in a larger field of view with a smaller focal length. The reasonable constraint of this condition can better improve the resolving power while satisfying the advantages of short focal length, large target area, and large image height. More preferably, 40≤(FOV×F) / H≤65. More preferably, 44≤(FOV×F) / H≤58.

[0153] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: TTL / H / θ ≤ 2. Satisfying this condition means that, given a fixed image height and field of view, the TTL of the optical system is shorter, enabling miniaturization of the optical lens. Preferably, TTL / H / θ ≤ 1.8. More preferably, TTL / H / θ ≤ 1.6. Even more preferably, TTL / H / θ ≤ 1.45. Given a fixed image height and field of view, the smaller the TTL / H / θ, the smaller the TTL, and the better the miniaturization effect.

[0154] In this embodiment, the maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the condition: D / H / θ ≤ 0.9. By satisfying this condition, while keeping the image height H and the radian value θ corresponding to the image height of the maximum field of view constant, a small front port diameter is ensured, enabling miniaturization. Preferably, D / H / θ ≤ 0.8. More preferably, D / H / θ ≤ 0.7. Even more preferably, D / H / θ ≤ 0.6. The smaller D / H / θ is, the smaller the front port diameter, and the better the miniaturization effect.

[0155] In this embodiment, the overall 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 relationship: F / H ≤ 0.8. With a fixed image height, a smaller focal length results in greater distortion, which not only affects the imaging effect in the central region of the optical lens but also the distortion in the peripheral field of view. The distortion in the edge field of view increases as the focal length F decreases, which is detrimental to achieving a low-distortion effect, affecting the imaging effect in the peripheral field of view and the overall performance of the optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited to a reasonable range, thereby improving the resolving power of the optical lens. Preferably, 0.25 ≤ F / H ≤ 0.7. More preferably, 0.3 ≤ F / H ≤ 0.6. Even more preferably, 0.4 ≤ F / H ≤ 0.55. Controlling F / H within this range further improves the resolving power of the optical lens.

[0156] In this embodiment, the aperture diameter (DST) and the total focal length (F) of the optical lens satisfy the following ratio: DST / F ≤ 1.5. A larger ratio of aperture diameter to effective focal length results in a larger aperture of the optical lens, achieving a greater amount of light intake under the same incident light, thus ensuring a brighter image in actual use. Preferably, 0.6 ≤ DST / F ≤ 1.2. More preferably, 0.7 ≤ DST / F ≤ 1.0. Even more preferably, 0.75 ≤ DST / F ≤ 0.95. Controlling DST / F within the preferred range allows for a larger aperture of the optical lens, resulting in more abundant light intake and a brighter image.

[0157] In this embodiment, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the focal length F of the entire optical lens: 15 ≤ arctan(1 / K(S2)) / F. Satisfying this condition ensures a larger angle subtended by the second side of the first lens, which helps to reduce the effective aperture height of the light rays exiting from this surface. A lower effective aperture height helps to reduce the magnification of large-angle light rays by the lens, thereby reducing chromatic aberration and improving resolution, while simultaneously achieving a short focal length for the entire system. Preferably, 18 ≤ arctan(1 / K(S2)) / F ≤ 40. This setting is more conducive to achieving a small aperture and miniaturization, highlighting the imaging effect in the central area. More preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 35. Even more preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 30. It should be noted here that K is the slope of the tangent line at the edge of the lens at the maximum field of view of the second side of the first lens.

[0158] In this embodiment, the image height H corresponding to the maximum field angle of the optical lens, the overall focal length value F of the optical lens, and the radian value θ of the maximum field angle of the optical lens satisfy: 0.5 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. Meeting this conditional formula ensures that, with the field angle and the size of the imaging surface unchanged, the optical focal length of the system is reduced, high angular resolution is achieved, and the imaging effect and clarity of the central region of the optical lens are highlighted. Preferably, 0.6 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.9. More preferably, 0.65 ≤ (H / 2) / (F * tan(θ / 2)) ≤ 0.86. This conditional formula is more preferably controlled, which is more conducive to achieving high angular resolution and highlighting the imaging effect and clarity of the central region of the optical lens.

[0159] In this embodiment, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: (d8 + d9) / TTL ≤ 0.4. Reasonably controlling the mutual relationship between the central thickness of the doublet lens on the optical axis and the overall optical length of the optical lens. If the proportion of the central thickness of the doublet lens is too large, the ability of the front lens to control light is reduced, and the light at the large-angle entrance pupil position is restricted at the front lens, resulting in a low relative illuminance. Preferably, 0.08 ≤ (d8 + d9) / TTL ≤ 0.3. With this setting, while the overall optical length of the optical lens remains unchanged, the central thickness of the doublet lens is reasonably set, which can further enhance the ability of the optical lens to control light, is conducive to regulating more light to enter the rear system, and further improves the relative illuminance. More preferably, 0.12 ≤ (d8 + d9) / TTL ≤ 0.2.

[0160] In this embodiment, the central curvature radius R3 of the first side of the second lens and the central curvature radius R4 of the second side of the second lens satisfy: 0 < R3 / R4 ≤ 2.5. The special shape setting of the second lens ensures that the R values of both sides are within a certain range, which is conducive to the smooth transition of the optical path of light passing through the lens and reduces the sensitivity of the system. Preferably, 0.25 ≤ R3 / R4 ≤ 2. This setting is more conducive to further improving the resolution ability. More preferably, 0.5 ≤ R3 / R4 ≤ 1.5. More preferably, 0.6 ≤ R3 / R4 ≤ 1.2.

[0161] In this embodiment, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 5 ≤ |F2 / F|. The second lens is preferably a plastic lens. A larger focal length results in less light deflection, allowing light to enter the rear optical system smoothly and facilitating the collection of edge field-of-view light. Preferably, 8 ≤ |F2 / F|. This setting, at high temperatures, shifts the photosensitive chip of the optical lens rearward, resulting in a smaller rate of change in the optical power of the second lens. This allows for better control of the overall thermal compensation of the optical lens, further improving resolution under high and low temperatures and ensuring excellent temperature performance. More preferably, 8 ≤ |F2 / F| ≤ 200. Even more preferably, 8 ≤ |F2 / F| ≤ 150.

[0162] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the overall focal length F of the optical lens: R1 / F ≤ 5. This setting helps ensure that the first side surface of the first lens is convex and has a small radius of curvature, which helps to collect incident light and reduce the height of the incident light, thus reducing the height at which the light enters the first lens and decreasing the front port diameter. The convex first side surface also compresses the height of the light emitted from the second side surface of the first lens, resulting in a lower light entry point into the second lens. This helps to reduce the magnification of large-angle light by the lens, thereby reducing dispersion and aberrations caused by light entering through the second lens, improving resolution. Simultaneously, it makes the lens structure compact, which is beneficial for miniaturization. Preferably, R1 / F ≤ 3. This setting of the first side surface of the first lens being convex and having a small radius of curvature further ensures strong light processing capabilities, ensuring that light entering the first lens from the first side is quickly deflected towards the optical axis, which helps to reduce the front port diameter and better accommodates the short focal length of the entire system, improving the resolution of small field of view. More preferably, 0.3 ≤ R1 / F ≤ 2.2. More preferably, 0.5 ≤ R1 / F ≤ 1.8.

[0163] In this embodiment, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL ≤ 0.35. Constraining the center thickness of the sixth lens to be relatively thick, resulting in a large proportion of the total system length, facilitates a smooth transition of light to the image plane and improves resolution. Preferably, d11 / TTL ≤ 0.2. This setting is more conducive to ensuring the proportion of the sixth lens in the total system length, greatly improving the resolving capability. More preferably, d11 / TTL ≤ 0.15. Even more preferably, 0.08 ≤ d11 / TTL ≤ 0.15.

[0164] In this embodiment, the overall focal length F of the optical lens and the optical back focal length (BFL, the distance from the center of the second side of the last lens to the center of the imaging plane) satisfy the following condition: F / BFL ≤ 3. Reasonably controlling the relationship between the focal length and the back focal length helps to achieve a longer back focal length and a shorter focal length for the entire system. A longer back focal length ensures that the light rays exiting from the second side of the sixth lens and hitting the image plane have a smoother trajectory, facilitating a smooth transition of peripheral light, thereby reducing the sensitivity of the optical system and highlighting the imaging effect in the central area. Preferably, F / BFL ≤ 2.5. More preferably, 0.5 ≤ F / BFL ≤ 1.8. Even more preferably, 0.75 ≤ F / BFL ≤ 1.5. Controlling the F / BFL within this more preferred range ensures a sufficiently long back focal length for the optical lens, resulting in a more pronounced reduction in sensitivity and better preservation of the imaging effect in the central area.

[0165] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -20 ≤ F6 / F7 ≤ -0.15. Constraining the focal length ratio of the six and seven lenses within a certain range minimizes the change in optical path length through the two lenses at high and low temperatures, making the thermal contributions of the lenses similar at both temperatures. This helps the entire optical system maintain stable performance over a wide temperature range. Preferably, -10 ≤ F6 / F7 ≤ -0.3. This setting further ensures that the thermal contributions of the two lenses are similar at high and low temperatures, which is beneficial for maintaining temperature performance stability. More preferably, -6 ≤ F6 / F7 ≤ -0.35. Even more preferably, -3 ≤ F6 / F7 ≤ -0.4.

[0166] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens and the central radius of curvature R2 of the second side surface of the first lens satisfy the condition: R1 / R2≤6. Constraining the R-value ratio of the two surfaces of the first lens within a certain range forms a special lens shape, resulting in an optical path difference between peripheral and central rays. This reduces the coupling of rays from each field of view within the chip, making each field of view clearer and simultaneously achieving a short focal length for the entire system. Preferably, 0.5≤R1 / R2≤5. This setting is more conducive to light entering the rear optical system and reduces the front diameter of the optical lens, decreasing its size and facilitating miniaturization and cost reduction. More preferably, 1≤R1 / R2≤4. Even more preferably, 1.5≤R1 / R2≤3.

[0167] In this embodiment, the central radius of curvature R6 of the second side of the third lens and the central radius of curvature R5 of the first side of the third lens satisfy the condition: 0.5 ≤ |R6 / R5|. Controlling the R values ​​of both sides of the third lens makes it biconvex with a gently sloping shape. The larger radius of curvature of the second side of the third lens helps to minimize the impact of large temperature changes on the focal length of the third lens, thus helping the entire optical system maintain stable performance over a wide temperature range. Preferably, 1 ≤ |R6 / R5| ≤ 200. This setting better ensures the temperature performance stability of the third lens. More preferably, 1.2 ≤ |R6 / R5| ≤ 160.

[0168] In this embodiment, the central radius of curvature R7 of the first side of the fourth lens and the central radius of curvature R8 of the second side of the fourth lens satisfy the following condition: 0.7 ≤ |R7 / R8| ≤ 3. Controlling the central radii of curvature of the two sides of the fourth lens to make them close facilitates a smooth light transition, reduces aberrations, and improves image quality. Preferably, 0.85 ≤ |R7 / R8| ≤ 2.5. This setting better ensures that the fourth lens can optimize aberrations while maintaining a smooth light transition. More preferably, 1.0 ≤ |R7 / R8| ≤ 2. Even more preferably, 1.2 ≤ |R7 / R8| ≤ 1.8.

[0169] In this embodiment, the central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy the condition: R4 / R5 < 0. Controlling the central radii of curvature of the second side surface of the second lens and the first side surface of the third lens ensures that their surface shapes are opposite, allowing light rays exiting the second lens to smoothly enter the first side surface of the third lens, facilitating a smooth light transition. Controlling R4 / R5 within a certain range also helps reduce light energy loss, improves the illumination and imaging quality of the peripheral field of view, and further enhances resolution. Preferably, -5 ≤ R4 / R5 ≤ -0.2. This setting further reduces light energy loss, better increases the illumination and imaging quality of the peripheral field of view, and further improves resolution. More preferably, -3 ≤ R4 / R5 ≤ -0.3. Even more preferably, -2.4 ≤ R4 / R5 ≤ -0.35.

[0170] In this embodiment, the central radius of curvature R10 of the second side of the fifth lens and the central radius of curvature R9 of the first side of the fifth lens satisfy the condition: 1.5 ≤ |R10 / R9|. Controlling the ratio of the two sides of the fifth lens within this range is beneficial for smooth light path, which can improve astigmatism and field curvature in imaging and enhance the resolving power of the optical system. Preferably, 2 ≤ |R10 / R9|. More preferably, 2.5 ≤ |R10 / R9| ≤ 40. Even more preferably, 3 ≤ |R10 / R9| ≤ 25. Controlling this condition within the preferred range can further improve astigmatism and field curvature, resulting in more prominent high resolving power.

[0171] In this embodiment, the central radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the overall focal length F of the optical lens: 1.5 ≤ |R10 / F|. The image-side radius R of the fifth lens is relatively large, ensuring a flatter shape and reducing the height of the outgoing light rays on the lens, thus reducing the lens aperture and allowing the outgoing light rays to transition more smoothly to the rear, thereby reducing system sensitivity. Preferably, 2 ≤ |R10 / F|. This setting further reduces the aperture of the fifth lens, further reducing system sensitivity. More preferably, 2.5 ≤ |R10 / F| ≤ 45. Even more preferably, 3 ≤ |R10 / F| ≤ 30.

[0172] In this embodiment, the total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: F / TTL ≤ 0.35. With a fixed TTL, controlling the ratio of F to TTL to be relatively small is beneficial for achieving a short focal length effect for the entire system, highlighting the imaging effect of a small field of view in the central region. Preferably, F / TTL ≤ 0.3. More preferably, F / TTL ≤ 0.24. Controlling this condition to a more favorable value is more conducive to satisfying the characteristics of a short focal length and further highlighting the imaging effect of a small field of view in the central region.

[0173] Example 2

[0174] like Figures 1 to 12As shown, the optical lens, along the optical axis from the first side to the second side, sequentially includes: a first lens with negative optical power; a second lens with optical power; a third lens with positive optical power; a fourth lens with positive optical power; a fifth lens with negative optical power; a sixth lens with positive optical power; and a seventh lens with optical power. The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following condition with respect to the focal length F of the entire optical lens: 15 ≤ arctan(1 / K(S2)) / F. Satisfying this condition ensures a larger angle subtended by the second side of the first lens, which helps to reduce the effective aperture height of the light rays exiting from that surface. A lower effective aperture height helps to reduce the magnification of large-angle light rays by the lens, thereby reducing dispersion and improving resolution, while simultaneously achieving a small aperture and miniaturization. Preferably, 18 ≤ arctan(1 / K(S2)) / F ≤ 40. This setting is more conducive to achieving a small aperture and miniaturization, highlighting the imaging effect in the central area. More preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 35. More preferably, 20 ≤ arctan(1 / K(S2)) / F ≤ 30. It should be noted here that K is the slope of the tangent line at the edge of the second side of the first lens at the maximum field of view.

[0175] In this embodiment, the first side of the first lens is convex, and the second side is concave. This arrangement maximizes the collection of light rays from a large field of view into the rear optical system, increasing light transmission and fixing the direction of large-angle light rays at the edges. The convex shape of the first side of the first lens facilitates the sliding of water droplets in real-world environments such as rain or snow, reducing their impact on imaging. The concave shape of the second side of the first lens helps reduce the height of the emitted light rays, allowing for a smaller aperture and miniaturization. The meniscus shape of the first lens increases the resolution at small field of view angles, redistributes image height, and achieves special central distortion. Furthermore, the first lens is preferably an aspherical lens, which further improves image quality. The aforementioned small field of view angle refers to a field of view of 0° to 20°.

[0176] In this embodiment, the second lens has negative optical power, with a concave first side and a convex second side. This facilitates the smooth reception of light entering through the first lens, ensuring stable light divergence and transition. The concave first side of the second lens allows the light transmitted from the first lens to continue diverging after passing through it, resulting in slower convergence of light at the rear end and an upward trend in the edge field of view. This combination with the first lens is beneficial for integration with large chips.

[0177] In this embodiment, the second lens has positive optical power, with a concave first side and a convex second side. This convergence of light rays, under the same field of view, facilitates proper light convergence and reduces light loss at large angles. Simultaneously, the convex second side of the second lens, in conjunction with the convex first side of the third lens, allows light rays exiting the second lens to smoothly enter the first side of the third lens, promoting a smooth transition, reducing light energy loss, improving illumination in the peripheral field of view, and altering the trajectory of edge rays. This results in a reduction in the front aperture of the optical lens, decreasing its size and contributing to miniaturization and cost reduction.

[0178] In this embodiment, the first side surface of the third lens is convex, and the second side surface is convex. The biconvex shape and gentle lens profile, combined with positive optical power, minimize the impact of large temperature variations on the focal length of the third lens, thus helping the entire optical system maintain stable performance over a wide temperature range. The convex-convex shape of the third lens, combined with the concave-convex shape of the second lens, facilitates a smooth transition of light into the rear lens, improving resolution.

[0179] In this embodiment, the first side of the third lens is convex, and the second side is concave. The positive optical power and the convex first side receive light from the second lens, smoothing the light path and reducing the generation of higher aberrations. The concave second side alters the light emission path, allowing diverging light to smoothly enter the rear and uniformly incident on the fourth lens, which is beneficial for obtaining a large image area and high resolution.

[0180] In this embodiment, both the first and second sides of the fourth lens are convex. The fourth lens has positive optical power, converging light rays and allowing them to converge more smoothly onto the imaging surface. This improves astigmatism and field curvature, enhancing the resolving power of the optical system. The fourth lens is biconvex with similar radii of curvature on both sides, ensuring that diverging light rays converge smoothly and enter the rear image, further smoothing the light path transition.

[0181] In this embodiment, both the first and second sides of the fifth lens are concave. Combined with negative optical power, this facilitates a smooth transition of the optical path difference between the peripheral and central fields of view. The fifth lens is biconcave, especially the first side, which causes a noticeable light reversal after emission, clearly distinguishing the peripheral and central rays in each field of view. This alters the trend of the peripheral rays, facilitating aberration correction between the central and peripheral rays in each field of view, and ultimately contributing to high resolution.

[0182] In this embodiment, the first side of the fifth lens is concave, and the second side is convex. The fifth lens has negative optical power, resulting in a smooth light path, which can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system. The concave-convex shape of the fifth lens has a gentle curve, so large temperature changes have a smaller impact on the focal length of the fifth lens, which helps the entire optical system maintain stable performance over a wide temperature range. The convex second side of the fifth lens helps to increase the cone angle when the light reaches the imaging plane and reduce the incident angle of the principal ray.

[0183] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is also convex. With positive optical power and a convex-convex surface with a gentle curve, diverging light rays can smoothly enter the rear, further smoothing the light path transition. This can improve astigmatism and field curvature in imaging, and enhance the resolving power of the optical system.

[0184] In this embodiment, the first side of the sixth lens is concave, and the second side is convex. The positive focal length of the sixth lens, paired with the negative focal length of the fifth lens, facilitates the collection of light entering through the fifth lens, resulting in a smooth transition of light path. The concave first side of the sixth lens allows the light transmitted from the fifth lens to continue diverging after passing through it, resulting in slower convergence of light at the rear end and an upward trend in the edge field of view. This design, combined with the first two lenses, is beneficial for integration with large chips.

[0185] In this embodiment, the seventh lens has negative optical power, with its first side being convex and its second side being concave. This facilitates the smooth entry of light into the imaging plane, improving resolution; simultaneously, it allows for sufficient correction of various aberrations in the optical system, thereby improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure.

[0186] In this embodiment, the seventh lens has negative optical power, and both its first and second sides are concave. The negative optical power of the seventh lens collects the light rays emitted from the biconvex lens of the sixth lens, which helps to appropriately diverge the forward light, matching the large chip. The concave first side of the seventh lens allows the light rays in the edge field of view to have a longer optical path than those in the center field of view, altering the light trajectory of the edge field of view and making it more concentrated when reaching the imaging plane. This defocusing corrects edge field-of-view aberrations, achieving high resolution.

[0187] In this embodiment, the seventh lens has positive optical power, and both its first and second sides are convex. The positive optical power and the double-convex design of the seventh lens help control the angle at which light enters the chip, thus improving image resolution.

[0188] This application employs seven lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, miniaturization, high relative illumination, low sensitivity, good temperature performance, short focal length, large angular resolution in the central region, and high luminous flux.

[0189] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented doublet lens. The use of a cemented doublet lens effectively corrects chromatic aberration, reduces the overall lens length, and allows light to transition smoothly to the rear system, thus optimizing the optical system's CRA, illumination, and distortion performance. The fourth lens has positive optical power, collecting light rays entering through it and ensuring a smooth transition to the rear, reducing the height of incident light rays. The fifth lens has negative optical power, clearly distinguishing the edge and center rays in each field of view, which is beneficial for aberration correction between the center and edge rays in each field of view and for achieving high resolution. The fifth lens uses a high-refractive-index, low-Abbe-number material, while the fourth lens uses a relatively low-refractive-index, high-Abbe-number material. The cementation of these two materials effectively corrects chromatic aberration in the optical system. This also reduces the number of assembly components between the fourth and fifth lenses, which helps reduce processes, overall weight, and costs. Furthermore, it reduces light loss caused by inter-lens reflections, improving image illumination and minimizing ghosting. Because light transitions smoothly through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, thus reducing tolerance sensitivity during lens assembly. This allows for a more efficient allocation of focal length, and the fact that both lenses are made of glass facilitates thermal compensation, improving lens performance at different temperatures.

[0190] In this embodiment, the first lens, second lens, fourth lens, fifth lens, sixth lens, and seventh lens are all aspherical lenses. By appropriately setting the aspherical lenses, it is beneficial to have a large angular resolution in the central region, thereby improving image resolution; it is also beneficial to improve field curvature and astigmatism, thereby enhancing resolving power.

[0191] In this embodiment, the optical lens also includes an aperture stop, which is positioned between the third lens and the fourth lens. This arrangement facilitates the effective focusing of light entering the optical system, reduces the lens aperture at the rear of the optical system, and lowers the system's assembly sensitivity.

[0192] In this embodiment, at least one of the first lens, second lens, fifth lens, sixth lens, and seventh lens is inverted. Selecting inverted elements for some lenses helps balance aberrations and improve resolution.

[0193] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view satisfy the condition: (FOV×F) / H≤80. Satisfying this condition means that, with a fixed image height, a smaller focal length results in a larger field of view, which not only affects the imaging effect in the central region of the optical lens but also the distortion of the peripheral field of view. A larger focal length affects the imaging effect in the peripheral field of view and the overall performance of the optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited to a reasonable range, thereby improving the resolving power of the optical lens while satisfying the requirements of short focal length, large target area, and large image height. This setting, with a fixed image height, results in a smaller focal length and a larger field of view. Through the reasonable constraint of this condition, the resolving power can be better improved, while simultaneously satisfying the advantages of short focal length, large target area, and large image height. Preferably, 30≤(FOV×F) / H≤70. More preferably, 40≤(FOV×F) / H≤65. More preferably, 44≤(FOV×F) / H≤58.

[0194] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: TTL / H / θ ≤ 2. Satisfying this condition means that, given a fixed image height and field of view, the TTL of the optical system is shorter, enabling miniaturization of the optical lens. Preferably, TTL / H / θ ≤ 1.8. More preferably, TTL / H / θ ≤ 1.6. Even more preferably, TTL / H / θ ≤ 1.45. Given a fixed image height and field of view, the smaller the TTL / H / θ, the smaller the TTL, and the better the miniaturization effect.

[0195] In this embodiment, the maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the condition: D / H / θ ≤ 0.9. By satisfying this condition, while keeping the image height H and the radian value θ corresponding to the image height of the maximum field of view constant, a small front port diameter is ensured, enabling miniaturization. Preferably, D / H / θ ≤ 0.8. More preferably, D / H / θ ≤ 0.7. Even more preferably, D / H / θ ≤ 0.6. The smaller D / H / θ is, the smaller the front port diameter, and the better the miniaturization effect.

[0196] In this embodiment, the overall 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 relationship: F / H ≤ 0.8. With a fixed image height, a smaller focal length results in greater distortion, which not only affects the imaging effect in the central region of the optical lens but also the distortion in the peripheral field of view. The distortion in the edge field of view increases as the focal length F decreases, which is detrimental to achieving a low-distortion effect, affecting the imaging effect in the peripheral field of view and the overall performance of the optical system. Therefore, the ratio of the focal length to the image height of the optical lens can be limited to a reasonable range, thereby improving the resolving power of the optical lens. Preferably, 0.25 ≤ F / H ≤ 0.7. More preferably, 0.3 ≤ F / H ≤ 0.6. Even more preferably, 0.4 ≤ F / H ≤ 0.55. Controlling F / H within this range further improves the resolving power of the optical lens.

[0197] In this embodiment, the aperture diameter (DST) and the total focal length (F) of the optical lens satisfy the following ratio: DST / F ≤ 1.5. A larger ratio of aperture diameter to effective focal length results in a larger aperture of the optical lens, achieving a greater amount of light intake under the same incident light, thus ensuring a brighter image in actual use. Preferably, 0.6 ≤ DST / F ≤ 1.2. More preferably, 0.7 ≤ DST / F ≤ 1.0. Even more preferably, 0.75 ≤ DST / F ≤ 0.95. Controlling DST / F within the preferred range allows for a larger aperture of the optical lens, resulting in more abundant light intake and a brighter image.

[0198] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.9. Satisfying this condition ensures that, while maintaining the same field of view and image plane size, reducing the system's optical focal length achieves a large angular resolution, highlighting the imaging effect and sharpness of the central area of ​​the optical lens. Preferably, 0.6 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.9. More preferably, 0.65 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.86. This condition, when controlled within a more favorable range, is more conducive to achieving a large angular resolution and highlighting the imaging effect and sharpness of the central area of ​​the optical lens.

[0199] In this embodiment, the central thickness d8 of the fourth lens, the central thickness d9 of the fifth lens, and the overall optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: (d8 + d9) / TTL ≤ 0.4. By reasonably controlling the relationship between the central thickness of the doublet lens on the optical axis and the overall optical length of the optical lens, if the proportion of the central thickness of the doublet lens is too large, the light control ability of the front lens decreases, the light at the large-angle entrance pupil position is restricted at the front lens, and the relative illuminance is low. Without changing the overall optical length of the optical lens, reasonably setting the central thickness of the doublet lens can enhance the light control ability of the optical lens, which is beneficial to controlling more light to enter the rear system and improving the relative illuminance. Preferably, 0.08 ≤ (d8 + d9) / TTL ≤ 0.3. With this setting, without changing the overall optical length of the optical lens, reasonably setting the central thickness of the doublet lens can further enhance the light control ability of the optical lens, which is beneficial to controlling more light to enter the rear system and further improving the relative illuminance. More preferably, 0.12 ≤ (d8 + d9) / TTL ≤ 0.2.

[0200] In this embodiment, the central curvature radius R3 of the first side of the second lens and the central curvature radius R4 of the second side of the second lens satisfy: 0 < R3 / R4 ≤ 2.5. The special shape setting of the second lens ensures that the R values of both sides are within a certain range, which is beneficial to the smooth transition of the optical path of light through the lens and reduces the system sensitivity. Preferably, 0.25 ≤ R3 / R4 ≤ 2. With this setting, it is more beneficial to further improve the resolution ability. More preferably, 0.5 ≤ R3 / R4 ≤ 1.5. More preferably, 0.6 ≤ R3 / R4 ≤ 1.2.

[0201] In this embodiment, the focal length F2 of the second lens and the overall focal length value F of the optical lens satisfy: 5 ≤ |F2 / F|. The second lens is preferably a plastic lens. The second lens has a relatively large focal length and a small light deflection ability, which can make light enter the rear optical system smoothly and is beneficial to collecting light in the edge field of view; at high temperatures, the photosensitive chip of the optical lens moves backward, and the change rate of the optical power of the second lens is small, which can control the thermal compensation amount of the entire optical lens and is beneficial to the optical lens maintaining good resolution at high and low temperatures and having good temperature performance. Preferably, 8 ≤ |F2 / F|. With this setting, at high temperatures, the photosensitive chip of the optical lens moves backward, and the change rate of the optical power of the second lens is small, which can better control the thermal compensation amount of the entire optical lens and is more beneficial to the optical lens maintaining good resolution at high and low temperatures and ensuring good temperature performance. More preferably, 8 ≤ |F2 / F| ≤ 200. More preferably, 8 ≤ |F2 / F| ≤ 150.

[0202] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the overall focal length F of the optical lens: R1 / F ≤ 5. This setting helps ensure that the first side surface of the first lens is convex and has a small radius of curvature, which helps to collect incident light and reduce the height of the incident light, thus reducing the height at which the light enters the first lens and decreasing the front port diameter. The convex first side surface also compresses the height of the light emitted from the second side surface of the first lens, resulting in a lower light entry point into the second lens. This helps to reduce the magnification of large-angle light by the lens, thereby reducing dispersion and aberrations caused by light entering through the second lens, improving resolution. Simultaneously, it makes the lens structure compact, which is beneficial for miniaturization. Preferably, R1 / F ≤ 3. This setting of the first side surface of the first lens being convex and having a small radius of curvature further ensures strong light processing capabilities, ensuring that light entering the first lens from the first side is quickly deflected towards the optical axis, which helps to reduce the front port diameter and better accommodates the short focal length of the entire system, improving the resolution of small field of view. More preferably, 0.3 ≤ R1 / F ≤ 2.2. More preferably, 0.5 ≤ R1 / F ≤ 1.8.

[0203] In this embodiment, the center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the following condition: d11 / TTL ≤ 0.35. Constraining the center thickness of the sixth lens to be relatively thick, resulting in a large proportion of the total system length, facilitates a smooth transition of light to the image plane and improves resolution. Preferably, d11 / TTL ≤ 0.2. This setting is more conducive to ensuring the proportion of the sixth lens in the total system length, greatly improving the resolving capability. More preferably, d11 / TTL ≤ 0.15. Even more preferably, 0.08 ≤ d11 / TTL ≤ 0.15.

[0204] In this embodiment, the overall focal length F of the optical lens and the optical back focal length (BFL, the distance from the center of the second side of the last lens to the center of the imaging plane) satisfy the following condition: F / BFL ≤ 3. Reasonably controlling the relationship between the focal length and the back focal length helps to achieve a longer back focal length and a shorter focal length for the entire system. A longer back focal length ensures that the light rays exiting from the second side of the sixth lens and hitting the image plane have a smoother trajectory, facilitating a smooth transition of peripheral light, thereby reducing the sensitivity of the optical system and highlighting the imaging effect in the central area. Preferably, F / BFL ≤ 2.5. More preferably, 0.5 ≤ F / BFL ≤ 1.8. Even more preferably, 0.75 ≤ F / BFL ≤ 1.5. Controlling the F / BFL within this more preferred range ensures a sufficiently long back focal length for the optical lens, resulting in a more pronounced reduction in sensitivity and better preservation of the imaging effect in the central area.

[0205] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -20 ≤ F6 / F7 ≤ -0.15. Constraining the focal length ratio of the six and seven lenses within a certain range minimizes the change in optical path length through the two lenses at high and low temperatures, making the thermal contributions of the lenses similar at both temperatures. This helps the entire optical system maintain stable performance over a wide temperature range. Preferably, -10 ≤ F6 / F7 ≤ -0.3. This setting further ensures that the thermal contributions of the two lenses are similar at high and low temperatures, which is beneficial for maintaining temperature performance stability. More preferably, -6 ≤ F6 / F7 ≤ -0.35. Even more preferably, -3 ≤ F6 / F7 ≤ -0.4.

[0206] In this embodiment, the central radius of curvature R1 of the first side surface of the first lens and the central radius of curvature R2 of the second side surface of the first lens satisfy the condition: R1 / R2≤6. Constraining the R-value ratio of the two surfaces of the first lens within a certain range forms a special lens shape, resulting in an optical path difference between the peripheral and central rays, reducing the coupling of rays from each field of view within the chip, and making the imaging of each field of view clearer. It also facilitates the entry of light into the rear optical system, reduces the front port diameter of the optical lens, and decreases the volume, which is beneficial for miniaturization and cost reduction. Preferably, 0.5≤R1 / R2≤5. This setting is more conducive to the entry of light into the rear optical system and reduces the front port diameter of the optical lens, decreasing the volume and facilitating miniaturization and cost reduction. More preferably, 1≤R1 / R2≤4. Even more preferably, 1.5≤R1 / R2≤3.

[0207] In this embodiment, the central radius of curvature R6 of the second side of the third lens and the central radius of curvature R5 of the first side of the third lens satisfy the condition: 0.5 ≤ |R6 / R5|. Controlling the R values ​​of both sides of the third lens makes it biconvex with a gently sloping shape. The larger radius of curvature of the second side of the third lens helps to minimize the impact of large temperature changes on the focal length of the third lens, thus helping the entire optical system maintain stable performance over a wide temperature range. Preferably, 1 ≤ |R6 / R5| ≤ 200. This setting better ensures the temperature performance stability of the third lens. More preferably, 1.2 ≤ |R6 / R5| ≤ 160.

[0208] In this embodiment, the central radius of curvature R7 of the first side of the fourth lens and the central radius of curvature R8 of the second side of the fourth lens satisfy the following condition: 0.7 ≤ |R7 / R8| ≤ 3. Controlling the central radii of curvature of the two sides of the fourth lens to make them close facilitates a smooth light transition, reduces aberrations, and improves image quality. Preferably, 0.85 ≤ |R7 / R8| ≤ 2.5. This setting better ensures that the fourth lens can optimize aberrations while maintaining a smooth light transition. More preferably, 1.0 ≤ |R7 / R8| ≤ 2. Even more preferably, 1.2 ≤ |R7 / R8| ≤ 1.8.

[0209] In this embodiment, the central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy the condition: R4 / R5 < 0. Controlling the central radii of curvature of the second side surface of the second lens and the first side surface of the third lens ensures that their surface shapes are opposite, allowing light rays exiting the second lens to smoothly enter the first side surface of the third lens, facilitating a smooth light transition. Controlling R4 / R5 within a certain range also helps reduce light energy loss, improves the illumination and imaging quality of the peripheral field of view, and further enhances resolution. Preferably, -5 ≤ R4 / R5 ≤ -0.2. This setting further reduces light energy loss, better increases the illumination and imaging quality of the peripheral field of view, and further improves resolution. More preferably, -3 ≤ R4 / R5 ≤ -0.3. Even more preferably, -2.4 ≤ R4 / R5 ≤ -0.35.

[0210] In this embodiment, the central radius of curvature R10 of the second side of the fifth lens and the central radius of curvature R9 of the first side of the fifth lens satisfy the condition: 1.5 ≤ |R10 / R9|. Controlling the ratio of the two sides of the fifth lens within this range is beneficial for smooth light path, which can improve astigmatism and field curvature in imaging and enhance the resolving power of the optical system. Preferably, 2 ≤ |R10 / R9|. More preferably, 2.5 ≤ |R10 / R9| ≤ 40. Even more preferably, 3 ≤ |R10 / R9| ≤ 25. Controlling this condition within the preferred range can further improve astigmatism and field curvature, resulting in more prominent high resolving power.

[0211] In this embodiment, the central radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the overall focal length F of the optical lens: 1.5 ≤ |R10 / F|. The image-side radius R of the fifth lens is relatively large, ensuring a flatter shape and reducing the height of the outgoing light rays on the lens, thus reducing the lens aperture and allowing the outgoing light rays to transition more smoothly to the rear, thereby reducing system sensitivity. Preferably, 2 ≤ |R10 / F|. This setting further reduces the aperture of the fifth lens, further reducing system sensitivity. More preferably, 2.5 ≤ |R10 / F| ≤ 45. Even more preferably, 3 ≤ |R10 / F| ≤ 30.

[0212] In this embodiment, the total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: F / TTL ≤ 0.35. With a fixed TTL, controlling the ratio of F to TTL to be relatively small is beneficial for achieving a short focal length effect for the entire system, highlighting the imaging effect of a small field of view in the central region. Preferably, F / TTL ≤ 0.3. More preferably, F / TTL ≤ 0.24. Controlling this condition to a more favorable value is more conducive to satisfying the characteristics of a short focal length and further highlighting the imaging effect of a small field of view in the central region.

[0213] Optionally, the aforementioned optical lens may also include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0214] The optical lens in this application may employ multiple lenses, such as the seven lenses mentioned above. 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. The characteristic of an aspherical lens is that its curvature changes continuously from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior 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 image quality.

[0215] In this exemplary embodiment, the solution is not limited to plastic or glass for the lenses. If temperature performance is a primary concern, the first, second, third, fourth, fifth, sixth, and seventh lenses 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 can prevent lens blurring caused by high and low temperature variations in the operating environment, thus affecting the normal use of the optical lens. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, the first to seventh lenses can all be aspherical glass lenses. Of course, 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.

[0216] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0217] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiments, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0218] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0219] It should be noted that any of the examples one through twelve below are applicable to all embodiments of this application.

[0220] Example 1

[0221] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0222] like Figure 1 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0223] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0224] In this example, the total effective focal length F of the optical lens is 2.508mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 13.915mm.

[0225] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0226] 1 2.802 0.600 1.54 56.11 2 1.268 2.854 3 -3.310 1.026 1.54 56.11 4 -3.600 0.100 5 7.752 2.065 1.77 49.61 6 -10.068 0.457 STO Infinity -0.066 8 4.987 2.075 1.54 56.11 9 -3.140 0.550 1.64 23.53 10 21.408 0.100 11 13.255 1.630 1.54 56.11 12 -2.802 0.088 13 5.501 0.464 1.64 23.53 14 2.601 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.420 IMA / /

[0227] Table 1

[0228] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0229]

[0230] 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; A, B, C, D, E, F, and G are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspherical lens surfaces S1-S14 in Example 1.

[0231]

[0232]

[0233] Table 2

[0234] Example 2

[0235] like Figure 2 The diagram shown is a schematic of the optical lens structure for Example 2. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples.

[0236] like Figure 2 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0237] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0238] In this example, the first side surface S1 of the first lens, the first side surface S3 of the second lens, the first side surface S9 of the fifth lens, the first side surface S13 of the seventh lens, and the second side surface S14 of the seventh lens are all provided with inversion.

[0239] In this example, the total effective focal length F of the optical lens is 2.508mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.094mm.

[0240] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0241]

[0242]

[0243] Table 3

[0244] Table 4 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 2.

[0245]

[0246] Table 4

[0247] Example 3

[0248] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0249] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0250] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0251] In this example, the first side surface S1 of the first lens, the second side surface S10 of the fifth lens, the second side surface S12 of the sixth lens, and the first side surface S13 of the seventh lens are all provided with inversion.

[0252] In this example, the total effective focal length F of the optical lens is 2.581mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.625mm.

[0253] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0254] 1 2.758 0.600 1.54 56.11 2 1.261 2.770 3 -3.094 1.314 1.54 56.11 4 -4.426 0.078 5 4.440 2.225 1.77 49.61 6 456.556 0.137 STO Infinity 0.622 8 4.689 1.682 1.54 56.11 9 -3.400 0.550 1.64 23.53 10 45.938 0.100 11 12.278 1.600 1.54 56.11 12 -3.205 0.159 13 9.872 0.600 1.64 23.53 14 3.867 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.635 IMA / /

[0255] Table 5

[0256] Table 6 below shows the conic coefficient k and the coefficients of each higher-order term AG that can be used on the aspherical lens surface in Example 3.

[0257]

[0258]

[0259] Table 6

[0260] Example 4

[0261] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0262] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0263] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0264] In this example, the first side surface S3 of the second lens, the second side surface S10 of the fifth lens, the second side surface S12 of the sixth lens, the first side surface S13 of the seventh lens, and the second side surface S14 of the seventh lens are all provided with inversion.

[0265] In this example, the total effective focal length F of the optical lens is 2.768mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 13.714mm.

[0266] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0267]

[0268]

[0269] Table 7

[0270] Table 8 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 4.

[0271]

[0272] Table 8

[0273] Example 5

[0274] like Figure 5The diagram shown is a schematic of the optical lens structure of Example 5.

[0275] like Figure 5 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0276] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0277] In this example, the first side surface S1 of the first lens, the first side surface S3 of the second lens, the first side surface S9 of the fifth lens, the first side surface S11 of the sixth lens, the second side surface S12 of the sixth lens, the first side surface S13 of the seventh lens, and the second side surface S14 of the seventh lens are all curved. In this example, the total effective focal length F of the optical lens is 2.716mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.652mm.

[0278] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0279] 1 2.615 0.600 1.54 56.11 2 1.263 2.982 3 -3.168 1.310 1.54 56.11 4 -4.508 0.092 5 4.202 2.672 1.77 49.61 6 255.073 0.137 STO Infinity 0.178 8 4.443 1.560 1.54 56.11 9 -2.630 0.550 1.64 23.53 10 -10.219 0.250 11 -9.238 1.613 1.54 56.11 12 -3.092 0.100 13 7.757 0.500 1.64 23.53 14 3.366 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.552 IMA / /

[0280] Table 9

[0281] Table 10 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 5.

[0282]

[0283]

[0284] Table 10

[0285] Example 6

[0286] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0287] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0288] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0289] In this example, the first side surface S1 of the first lens, the first side surface S3 of the second lens, and the second side surface S12 of the sixth lens are all provided with inversion.

[0290] In this example, the total effective focal length F of the optical lens is 2.711mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.437mm.

[0291] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0292]

[0293]

[0294] Table 11

[0295] Table 12 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 6.

[0296]

[0297] Table 12

[0298] Example 7

[0299] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0300] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0301] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0302] In this example, the first side surface S1 of the first lens, the second side surface S10 of the fifth lens, the second side surface S12 of the sixth lens, the first side surface S13 of the seventh lens, and the second side surface S14 of the seventh lens are all provided with inversion.

[0303] In this example, the total effective focal length F of the optical lens is 2.688mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.103mm.

[0304] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0305] 1 2.703 0.801 1.54 56.11 2 1.259 2.742 3 -3.103 1.372 1.54 56.11 4 -3.953 0.100 5 4.836 2.253 1.77 49.61 6 -28.544 0.137 STO Infinity 0.058 8 4.918 1.688 1.54 56.11 9 -3.159 0.496 1.64 23.53 10 38.827 0.100 11 13.196 1.676 1.54 56.11 12 -3.297 0.154 13 -43.236 0.600 1.64 23.53 14 5.867 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.374 IMA / /

[0306] Table 13

[0307] Table 14 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 7.

[0308]

[0309] Table 14

[0310] Example 8

[0311] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0312] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0313] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0314] In this example, both the first side surface S1 of the first lens and the second side surface S14 of the seventh lens are curved.

[0315] In this example, the total effective focal length F of the optical lens is 2.678mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.206mm.

[0316] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0317] 1 2.699 0.800 1.54 56.11 2 1.257 2.699 3 -3.135 1.422 1.54 56.11 4 -3.994 0.100 5 5.045 2.293 1.77 49.61 6 -20.920 0.137 STO Infinity 0.196 8 4.826 1.629 1.54 56.11 9 -3.126 0.559 1.64 23.53 10 42.817 0.100 11 11.660 1.604 1.54 56.11 12 -4.061 0.156 13 -64.752 0.600 1.64 23.53 14 6.578 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 0.359 IMA / /

[0318] Table 15

[0319] Table 16 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used for the aspherical lens surface in Example 8.

[0320]

[0321] Table 16

[0322] Example 9

[0323] like Figure 9 The diagram shown is a schematic of the optical lens structure of Example 9.

[0324] like Figure 9As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0325] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0326] In this example, both the first side surface S13 and the second side surface S14 of the seventh lens are curved.

[0327] In this example, the total effective focal length F of the optical lens is 2.691mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 14.507mm.

[0328] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0329] 1 2.650 0.600 1.54 56.11 2 1.255 2.680 3 -3.500 1.080 1.54 56.11 4 -4.920 0.080 5 7.400 1.655 1.77 49.61 6 -11.092 0.140 STO Infinity 0.622 8 4.946 1.800 1.54 56.11 9 -3.200 0.550 1.64 23.53 10 43.516 0.100 11 12.278 1.700 1.54 56.11 12 -3.190 0.160 13 9.300 0.700 1.64 23.53 14 3.715 0.670 15 Infinity 0.900 1.52 64.21 16 Infinity 1.070 IMA / /

[0330] Table 17

[0331] Table 18 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 9.

[0332]

[0333] Table 18

[0334] Example 10

[0335] like Figure 10 The diagram shown is a schematic of the optical lens structure of Example 10.

[0336] like Figure 10 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0337] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is convex, and its second side surface S14 is concave. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0338] In this example, both the first side surface S13 and the second side surface S14 of the seventh lens are curved.

[0339] In this example, the total effective focal length F of the optical lens is 2.630mm, the maximum field of view (FOV) of the optical lens is 112.000°, and the total length (TTL) of the optical lens is 15.100mm.

[0340] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0341] 1 2.700 0.620 1.54 56.11 2 1.240 2.700 3 -3.500 1.100 1.54 56.11 4 -4.900 0.100 5 7.400 1.700 1.77 49.61 6 -11.000 0.140 STO Infinity 0.700 8 4.950 1.900 1.54 56.11 9 -3.200 0.600 1.64 23.53 10 50.000 0.200 11 12.300 1.800 1.54 56.11 12 -3.190 0.200 13 9.300 0.700 1.64 23.53 14 3.800 0.670 15 Infinity 0.900 1.52 64.21 16 Infinity 1.070

[0342] Table 19

[0343] Table 20 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used on the aspherical lens surface in Example 10.

[0344]

[0345] Table 20

[0346] Example 11

[0347] like Figure 11 The diagram shown is a schematic of the optical lens structure of Example 11.

[0348] like Figure 11 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0349] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0350] In this example, the first side surface S13 of the seventh lens is set to be curved.

[0351] In this example, the total effective focal length F of the optical lens is 2.130mm, the maximum field of view (FOV) of the optical lens is 112.029°, and the total length (TTL) of the optical lens is 14.910mm.

[0352] Table 21 shows the basic structural parameters of the optical lens in Example 11, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0353] 1 2.758 0.600 1.54 56.00 2 1.256 2.758 3 -3.291 1.093 1.54 56.00 4 -4.873 0.127 5 7.379 1.843 1.77 49.61 6 -11.159 0.137 STO Infinity 0.683 8 4.931 1.827 1.54 56.00 9 -3.263 0.550 1.64 23.53 10 52.936 0.101 11 12.278 1.655 1.54 56.00 12 -3.205 0.178 13 89.000 0.730 1.64 23.53 14 -93.000 0.654 15 Infinity 0.900 1.52 64.21 16 Infinity 1.073 IMA / /

[0354] Table 21

[0355] Table 22 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used for the aspherical lens surface in Example 11.

[0356]

[0357] Table 22

[0358] Example 12

[0359] like Figure 12 The diagram shown is a schematic of the optical lens structure of Example Twelve.

[0360] like Figure 12 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, first side surface of protective glass S15, second side surface of protective glass S16, and imaging surface IMA.

[0361] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. Light from the first side passes sequentially through surfaces S1 to S16 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0362] In this example, the first side surface S13 of the seventh lens is set to be curved.

[0363] In this example, the total effective focal length F of the optical lens is 2.122mm, the maximum field of view (FOV) of the optical lens is 112.029°, and the total length (TTL) of the optical lens is 14.876mm.

[0364] Table 23 shows the basic structural parameters of the optical lens of Example Twelve, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0365] 1 2.758 0.600 1.54 56.00 2 1.256 2.758 3 -3.291 1.093 1.54 56.00 4 -4.873 0.127 5 7.379 1.843 1.77 49.61 6 -11.159 0.137 STO Infinity 0.683 8 4.931 1.827 1.54 56.00 9 -3.263 0.550 1.64 23.53 10 52.936 0.101 11 12.278 1.655 1.54 56.00 12 -3.205 0.178 13 79.000 0.750 1.64 23.53 14 -80.000 0.600 15 Infinity 0.900 1.52 64.21 16 Infinity 1.073 IMA / /

[0366] Table 23

[0367] Table 24 below shows the conic coefficient k and the coefficients AG of each higher-order term that can be used for the aspherical lens surface in Example Twelve.

[0368]

[0369]

[0370] Table 24 summarizes that Examples 1 to 12 respectively satisfy the relationships shown in Table 25.

[0371]

[0372]

[0373] Table 25

[0374] Table 26 gives the effective focal length F of the optical lenses in Examples 1 to 12, and the effective focal lengths of each lens from F1 to F7, etc. (unit: mm).

[0375]

[0376]

[0377] Table 26

[0378] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0379] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0380] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0381] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens with optical power, wherein the first side of the second lens is concave and the second side is convex; A third lens with positive optical power, wherein the first side surface of the third lens is convex; A fourth lens with positive optical power, wherein the first side surface of the fourth lens is convex and the second side surface is convex; A fifth lens with negative optical power, wherein the first side surface of the fifth lens is concave; A sixth lens having positive optical power, wherein the second side surface of the sixth lens is convex; A seventh lens with optical power; The optical lens comprises seven lenses with optical power. The total 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: 0.25 ≤ F / H ≤ 0.

6. The central radius of curvature R1 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.3 ≤ R1 / F ≤ 3. The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.65 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.

9. The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.515 ≤ D / H / θ ≤ 0.

9.

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

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

4. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens is concave; or the second side surface of the fifth lens is convex.

5. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens is convex; or the first side surface of the sixth lens is concave.

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

7. The optical lens according to claim 1, characterized in that, The fourth lens and the fifth lens are cemented together to form a cemented doublet lens; and / or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical lenses.

8. The optical lens according to claim 1, characterized in that, The optical lens further includes an aperture stop disposed between the third lens and the fourth lens; and / or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with a recurve.

9. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum field of view (FOV) of the optical lens, the total 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: 30 ≤ (FOV × F) / H ≤ 70.

10. The optical lens according to claim 9, characterized in that, The maximum field of view (FOV) of the optical lens, the total 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: 40 ≤ (FOV × F) / H ≤ 65.

11. The optical lens according to any one of claims 1 to 8, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.215≤TTL / H / θ≤2.

12. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.515≤D / H / θ≤0.

7.

13. The optical lens according to any one of claims 1 to 8, characterized in that, The aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: 0.6 ≤ DST / F ≤ 1.

2.

14. The optical lens according to any one of claims 1 to 8, characterized in that, The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 15≤arctan(1 / K(S2)) / F≤40.

15. The optical lens according to claim 14, characterized in that, The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 18≤arctan(1 / K(S2)) / F≤40.

16. The optical lens according to any one of claims 1 to 8, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.08≤(d8+d9) / TTL≤0.

3.

17. The optical lens according to claim 16, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.12≤(d8+d9) / TTL≤0.

2.

18. The optical lens according to any one of claims 1 to 8, characterized in that, The central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following: 0 <R3 / R4≤2.5。 19. The optical lens according to claim 18, characterized in that, The central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens satisfy the following condition: 0.25≤R3 / R4≤2.

20. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 5≤|F2 / F|≤200.

21. The optical lens according to claim 20, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8≤|F2 / F|≤200.

22. The optical lens according to claim 1, characterized in that, The central radius of curvature R1 of the first side of the first lens satisfies the following relationship with the total focal length F of the optical lens: 0.5≤R1 / F≤1.

8.

23. The optical lens according to any one of claims 1 to 8, characterized in that, The center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.08≤d11 / TTL≤0.

2.

24. The optical lens according to claim 23, characterized in that, The center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.08≤d11 / TTL≤0.

15.

25. The optical lens according to any one of claims 1 to 8, characterized in that, The total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.5 ≤ F / BFL ≤ 1.

8.

26. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.

3.

27. The optical lens according to claim 26, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -6≤F6 / F7≤-0.

35.

28. The optical lens according to any one of claims 1 to 8, characterized in that, The central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 0.5≤R1 / R2≤5.

29. The optical lens according to claim 28, characterized in that, The central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 1≤R1 / R2≤4.

30. The optical lens according to any one of claims 1 to 8, characterized in that, The central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens satisfy the following condition: 0.5≤|R6 / R5|≤200.

31. The optical lens according to claim 30, characterized in that, The central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens satisfy the following condition: 0.8 ≤ |R6 / R5| ≤ 200.

32. The optical lens according to any one of claims 1 to 8, characterized in that, The central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.7≤|R7 / R8|≤3.

33. The optical lens according to claim 32, characterized in that, The central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.85≤|R7 / R8|≤2.

5.

34. The optical lens according to any one of claims 1 to 8, characterized in that, The central radius of curvature R4 of the second side of the second lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: -5≤R4 / R5<0.

35. The optical lens according to claim 34, characterized in that, The central radius of curvature R4 of the second side of the second lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: -5≤R4 / R5≤-0.

2.

36. The optical lens according to any one of claims 1 to 8, characterized in that, The central curvature radius R10 of the second side of the fifth lens and the central curvature radius R9 of the first side of the fifth lens satisfy the following condition: 1.5 ≤ |R10 / R9| ≤ 40.

37. The optical lens according to any one of claims 1 to 8, characterized in that, The central curvature radius R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.5≤|R10 / F|≤45.

38. The optical lens according to claim 37, characterized in that, The central curvature radius R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤|R10 / F|≤45.

39. The optical lens according to any one of claims 1 to 8, characterized in that, The total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.143≤F / TTL≤0.

35.

40. The optical lens according to any one of claims 1 to 8, characterized in that, The optical lens satisfies at least one of the following relationships: The maximum field of view (FOV) of the optical lens, the total 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: 44.029 ≤ (FOV × F) / H ≤ 53.707; The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 1.215≤TTL / H / θ≤1.434; The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.515≤D / H / θ≤0.

596. The total 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 relationship: 0.393≤F / H≤0.480; The aperture diameter DST and the total focal length F of the optical lens satisfy the following relationship: 0.785≤DST / F≤0.944; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 22.464≤arctan(1 / K(S2)) / F≤29.574; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.703≤(H / 2) / (F*tan(θ / 2))≤0.858; The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.144≤(d8+d9) / TTL≤0.189; The central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.675≤R3 / R4≤0.935; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8 ≤ |F2 / F| ≤ 126.649; The central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: 0.953≤R1 / F≤1.299; The center thickness d11 of the sixth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.103≤d11 / TTL≤0.119; The total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.811≤F / BFL≤1.

400. The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -0.906≤F6 / F7≤0.079; The central radius of curvature R1 of the first side surface of the first lens and the central radius of curvature R2 of the second side surface of the first lens satisfy the following condition: 2.066≤R1 / R2≤2.209; The central radius of curvature R6 of the second side of the third lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: 1.299≤|R6 / R5|≤102.828; The central radius of curvature R7 of the first side surface of the fourth lens and the central radius of curvature R8 of the second side surface of the fourth lens satisfy the following condition: 1.379≤|R7 / R8|≤1.690; The central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy the following condition: -1.221≤R4 / R5≤-0.459; The central radius of curvature R10 of the second side of the fifth lens and the central radius of curvature R9 of the first side of the fifth lens satisfy the following condition: 3.446≤|R10 / R9|≤22.824; The central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 3.303≤|R10 / F|≤26.221; The total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.143≤F / TTL≤0.

202.

41. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens with optical power, wherein the first side of the second lens is concave and the second side is convex; A third lens with positive optical power, wherein the first side surface of the third lens is convex; A fourth lens with positive optical power, wherein the first side surface of the fourth lens is convex and the second side surface is convex; A fifth lens with negative optical power; A sixth lens having positive optical power, wherein the second side surface of the sixth lens is convex; A seventh lens with optical power; Wherein, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 15 ≤ arctan(1 / K(S2)) / F ≤ 40; the total number of lenses with optical power in the optical lens is seven; the total focal length F of the optical lens satisfies the following relationship with the image height H corresponding to the maximum field of view of the optical lens: 0.25 ≤ F / H ≤ 0.6; the central radius of curvature R1 of the first side of the first lens satisfies the following relationship with the total focal length F of the optical lens: 0 0.3≤R1 / F≤3; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy: 0.65≤(H / 2) / (F*tan(θ / 2))≤0.9; The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy: 0.515≤D / H / θ≤0.

9.

42. The optical lens according to claim 41, characterized in that, The second lens has negative optical power, or the second lens has positive optical power.

43. The optical lens according to claim 41, characterized in that, The second side surface of the third lens is convex; or the second side surface of the third lens is concave.

44. The optical lens according to claim 41, characterized in that, The first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave; or the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

45. The optical lens according to claim 41, characterized in that, The first side surface of the sixth lens is convex; or the first side surface of the sixth lens is concave.

46. ​​The optical lens according to claim 41, characterized in that, The seventh lens has negative optical power, and its first side surface is convex and its second side surface is concave; or the seventh lens has negative optical power, and its first side surface is concave and its second side surface is concave; or the seventh lens has positive optical power, and its first side surface is convex and its second side surface is convex.

47. The optical lens according to claim 41, characterized in that, The fourth lens and the fifth lens are cemented together to form a cemented doublet lens; and / or the first lens, the second lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical lenses.

48. The optical lens according to claim 41, characterized in that, The optical lens further includes an aperture stop disposed between the third lens and the fourth lens; and / or at least one of the first lens, the second lens, the fifth lens, the sixth lens and the seventh lens is provided with a recurve.

49. The optical lens according to any one of claims 41 to 48, characterized in that, The maximum field of view (FOV) of the optical lens, the total 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: 30 ≤ (FOV × F) / H ≤ 70.

50. The optical lens according to claim 49, characterized in that, The maximum field of view (FOV) of the optical lens, the total 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: 40 ≤ (FOV × F) / H ≤ 65.

51. The optical lens according to any one of claims 41 to 48, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.215≤TTL / H / θ≤2.

52. The optical lens according to any one of claims 41 to 48, characterized in that, The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.515≤D / H / θ≤0.

7.

53. The optical lens according to any one of claims 41 to 48, characterized in that, The aperture diameter DST and the total focal length F of the optical lens satisfy the following condition: 0.6 ≤ DST / F ≤ 1.

2.

54. The optical lens according to claim 53, characterized in that, The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 18≤arctan(1 / K(S2)) / F≤40.

55. The optical lens according to any one of claims 41 to 48, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.08≤(d8+d9) / TTL≤0.

3.

56. The optical lens according to claim 55, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.12≤(d8+d9) / TTL≤0.

2.

57. The optical lens according to any one of claims 41 to 48, characterized in that, The central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following: 0 <R3 / R4≤2.5。 58. The optical lens according to claim 57, characterized in that, The central curvature radius R3 of the first side surface of the second lens and the central curvature radius R4 of the second side surface of the second lens satisfy the following condition: 0.25≤R3 / R4≤2.

59. The optical lens according to any one of claims 41 to 48, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 5≤|F2 / F|≤200.

60. The optical lens according to claim 59, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8≤|F2 / F|≤200.

61. The optical lens according to claim 41, characterized in that, The central radius of curvature R1 of the first side of the first lens satisfies the following relationship with the total focal length F of the optical lens: 0.5≤R1 / F≤1.

8.

62. The optical lens according to any one of claims 41 to 48, characterized in that, The center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.08≤d11 / TTL≤0.

2.

63. The optical lens according to claim 62, characterized in that, The center thickness d11 of the sixth lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.08≤d11 / TTL≤0.

15.

64. The optical lens according to any one of claims 41 to 48, characterized in that, The total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.5 ≤ F / BFL ≤ 1.

8.

65. The optical lens according to any one of claims 41 to 48, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.

3.

66. The optical lens according to claim 65, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -6≤F6 / F7≤-0.

35.

67. The optical lens according to any one of claims 41 to 48, characterized in that, The central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 0.5≤R1 / R2≤5.

68. The optical lens according to claim 67, characterized in that, The central curvature radius R1 of the first side surface of the first lens and the central curvature radius R2 of the second side surface of the first lens satisfy the following condition: 1≤R1 / R2≤4.

69. The optical lens according to any one of claims 41 to 48, characterized in that, The central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens satisfy the following condition: 0.5≤|R6 / R5|≤200.

70. The optical lens according to claim 69, characterized in that, The central curvature radius R6 of the second side of the third lens and the central curvature radius R5 of the first side of the third lens satisfy the following condition: 0.8 ≤ |R6 / R5| ≤ 200.

71. The optical lens according to any one of claims 41 to 48, characterized in that, The central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.7≤|R7 / R8|≤3.

72. The optical lens according to claim 71, characterized in that, The central curvature radius R7 of the first side surface of the fourth lens and the central curvature radius R8 of the second side surface of the fourth lens satisfy the following condition: 0.85≤|R7 / R8|≤2.

5.

73. The optical lens according to any one of claims 41 to 48, characterized in that, The central radius of curvature R4 of the second side of the second lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: -5≤R4 / R5<0.

74. The optical lens according to claim 73, characterized in that, The central radius of curvature R4 of the second side of the second lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: -5≤R4 / R5≤-0.

2.

75. The optical lens according to any one of claims 41 to 48, characterized in that, The central curvature radius R10 of the second side of the fifth lens and the central curvature radius R9 of the first side of the fifth lens satisfy the following condition: 1.5 ≤ |R10 / R9| ≤ 40.

76. The optical lens according to any one of claims 41 to 48, characterized in that, The central curvature radius R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1.5≤|R10 / F|≤45.

77. The optical lens according to claim 76, characterized in that, The central curvature radius R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤|R10 / F|≤45.

78. The optical lens according to any one of claims 41 to 48, characterized in that, The total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.143≤F / TTL≤0.

35.

79. The optical lens according to any one of claims 41 to 48, characterized in that, The optical lens satisfies at least one of the following relationships: The maximum field of view (FOV) of the optical lens, the total 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: 44.029 ≤ (FOV × F) / H ≤ 53.707; The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: 1.215≤TTL / H / θ≤1.434; The maximum 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 radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.515≤D / H / θ≤0.

596. The total 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 relationship: 0.393≤F / H≤0.480; The aperture diameter DST and the total focal length F of the optical lens satisfy the following relationship: 0.785≤DST / F≤0.944; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies the following relationship with the total focal length F of the optical lens: 22.464≤arctan(1 / K(S2)) / F≤29.574; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.703≤(H / 2) / (F*tan(θ / 2))≤0.858; The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.144≤(d8+d9) / TTL≤0.189; The central radius of curvature R3 of the first side surface of the second lens and the central radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.675≤R3 / R4≤0.935; The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: 8 ≤ |F2 / F| ≤ 126.649; The central radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the total focal length F of the optical lens: 0.953≤R1 / F≤1.299; The center thickness d11 of the sixth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.103≤d11 / TTL≤0.119; The total focal length F of the optical lens and the optical back focal length, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.811≤F / BFL≤1.

400. The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -0.906≤F6 / F7≤0.079; The central radius of curvature R1 of the first side surface of the first lens and the central radius of curvature R2 of the second side surface of the first lens satisfy the following condition: 2.066≤R1 / R2≤2.209; The central radius of curvature R6 of the second side of the third lens and the central radius of curvature R5 of the first side of the third lens satisfy the following condition: 1.299≤|R6 / R5|≤102.828; The central radius of curvature R7 of the first side surface of the fourth lens and the central radius of curvature R8 of the second side surface of the fourth lens satisfy the following condition: 1.379≤|R7 / R8|≤1.690; The central radius of curvature R4 of the second side surface of the second lens and the central radius of curvature R5 of the first side surface of the third lens satisfy the following condition: -1.221≤R4 / R5≤-0.459; The central radius of curvature R10 of the second side of the fifth lens and the central radius of curvature R9 of the first side of the fifth lens satisfy the following condition: 3.446≤|R10 / R9|≤22.824; The central radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 3.303≤|R10 / F|≤26.221; The total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.143≤F / TTL≤0.

202.

80. An electronic device, characterized in that, It includes an optical lens as described in any one of claims 1 to 79 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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