Optical lens and electronic device with same

Abstract

The application provides an optical lens and an electronic device with the same. The optical lens comprises, in sequence from an object side to an image side along an optical axis, a first lens with negative optical power, at least one of the object side and the image side of the first lens being a concave surface; a second lens, the object side of the second lens being a concave surface, and the image side of the second lens being a convex surface; a third lens with positive optical power, at least one of the object side and the image side of the third lens being a convex surface; a fourth lens with positive optical power, at least one of the object side and the image side of the fourth lens being a convex surface; a fifth lens with negative optical power, the object side of the fifth lens being a convex surface, and the image side of the fifth lens being a concave surface; a sixth lens with positive optical power, the object side of the sixth lens being a convex surface, and the image side of the sixth lens being a convex surface; and a seventh lens, at least one of the object side and the image side of the seventh lens being a concave surface. The application solves the problem that the optical lens in the prior art cannot simultaneously achieve high resolution and miniaturization.

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 having the same. Background Technology

[0002] In recent years, with the rapid development of automotive driver assistance systems, optical lenses have been increasingly widely used in automobiles. As autonomous driving technology has matured considerably, automotive lenses, as a core component of these systems, have seen high resolution and miniaturization become key areas of technological development. Furthermore, considering the installation location and functionality of front-view automotive lenses, the design of an optical lens that comprehensively meets requirements such as high light throughput, minimal resolution deviation under high and low temperatures, high resolution, no ghosting, and miniaturization is urgently needed.

[0003] Currently, some existing optical lenses have weak light transmission capabilities, making them unsuitable for dark environments such as nighttime or rainy days. Other existing optical lenses fail to meet the requirements for ghosting-free imaging, leading to a risk of misjudging road conditions by autonomous driving assistance systems. While some existing optical lenses can achieve megapixel resolution, they suffer from severe aberrations such as chromatic aberration, astigmatism, and distortion. Still others cannot simultaneously achieve high resolution and miniaturization. Some existing optical lenses, while achieving cost reduction and portability, often use plastic lenses, which are susceptible to thermal expansion and contraction. This causes the optimal image plane to deviate from the chip at temperatures ranging from -40℃ to 120℃, resulting in unclear imaging. Furthermore, the high plasticity system exhibits poor thermal stability, and resolution fails to meet requirements after returning to room temperature. Finally, some telephoto lenses cannot achieve a wide field of view, resulting in low recognition of environmental objects and a small detection area in the center.

[0004] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve high resolution and miniaturization. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and an electronic device having the same, so as to solve the problem that high resolution and miniaturization cannot be achieved simultaneously in existing optical lenses.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising, sequentially from the object side to the image side along the optical axis: a first lens having negative optical power, wherein at least one of the object-side and image-side surfaces of the first lens is concave; a second lens having optical power, wherein the object-side surface of the second lens is concave and the image-side surface of the second lens is convex; a third lens having positive optical power, wherein at least one of the object-side and image-side surfaces of the third lens is convex; a fourth lens having positive optical power, wherein at least one of the object-side and image-side surfaces of the fourth lens is convex; a fifth lens having negative optical power, wherein the object-side surface of the fifth lens is convex and the image-side surface of the fifth lens is concave; a sixth lens having positive optical power, wherein the object-side and image-side surfaces of the sixth lens are convex; and a seventh lens having optical power, wherein at least one of the object-side and image-side surfaces of the seventh lens is concave.

[0007] Furthermore, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave.

[0008] Furthermore, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave.

[0009] Furthermore, the object-side surface of the third lens is concave, and the image-side surface of the third lens is convex.

[0010] Furthermore, the object-side surface of the third lens is convex, and the image-side surface of the third lens is also convex.

[0011] Furthermore, the object-side surface of the fourth lens is concave, and the image-side surface of the fourth lens is convex.

[0012] Furthermore, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is also convex.

[0013] Furthermore, the seventh lens has negative optical power, the object side of the seventh lens is convex, and the image side of the seventh lens is concave.

[0014] Furthermore, the seventh lens has negative optical power, and both the object-side and image-side surfaces of the seventh lens are concave.

[0015] Furthermore, the seventh lens has positive optical power, the object side of the seventh lens is convex, and the image side of the seventh lens is concave.

[0016] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens or between the third lens and the fourth lens.

[0017] Furthermore, the first lens is an aspherical lens and / or the seventh lens is an aspherical lens.

[0018] Furthermore, the seventh lens is a recurve lens.

[0019] Furthermore, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0020] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: TTL / H / FOV≤0.04.

[0021] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / FOV≤0.03.

[0022] Furthermore, the maximum field of view (FOV) of the optical lens in radians θ, the total focal length (F) of the optical lens, and the maximum aperture (D) of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.8.

[0023] Furthermore, the maximum aperture D of the object 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 FOV of the optical lens satisfy the following condition: 0.3≤D / H / θ≤0.8.

[0024] Furthermore, the combined focal length F34 of the third and fourth lenses and the overall focal length F of the optical lens satisfy the following relationship: 1≤F34 / F≤4.

[0025] Furthermore, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -3≤F1 / F≤-0.5.

[0026] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view FOV of the optical lens satisfy the following: 5≤TTL / θ / 2≤10.

[0027] 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: 72 ≤ (FOV × F) / H ≤ 85.

[0028] 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 FOV of the optical lens satisfy the following condition: 0.1≤|(HF*θ) / (F*θ)|≤0.4.

[0029] 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 FOV of the optical lens satisfy the following condition: 0.3≤(H / 2) / (F*tan(θ / 2))≤0.6.

[0030] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following relationship: |F2 / F|≥1.

[0031] Furthermore, the F-number FNO of the optical lens satisfies: FNO≤1.7.

[0032] Furthermore, the angle subtended by the first lens of the optical lens at the maximum field of view of the image side is arctan(1 / K(S2)) which satisfies: 20≤arctan(1 / K(S2))≤60, where K is the edge slope of the lens at the maximum field of view of the image side of the first lens, and S2 is the image side of the first lens.

[0033] Furthermore, the central radius of curvature R3 of the object side of the second lens and the central radius of curvature R4 of the image side of the second lens satisfy the following condition: 0.3≤R3 / R4≤2.

[0034] Furthermore, the center thickness T2 of the object side of the second lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T2 / TTL≤0.4.

[0035] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.3 ≤ F3 / F4 ≤ 2.

[0036] Furthermore, the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 0 ≤ |R5 / R6| ≤ 19.

[0037] Furthermore, the object-side center thickness T3 of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T3 / TTL≤0.3.

[0038] Furthermore, the central radius of curvature R7 of the object side of the fourth lens and the central radius of curvature R8 of the image side of the fourth lens satisfy the following condition: 0.1≤|R7 / R8|≤10.

[0039] Furthermore, the object-side center thickness T4 of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T4 / TTL≤0.4.

[0040] Furthermore, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: F5 / F≤0.

[0041] Furthermore, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the following condition: -4≤F5 / F6≤-0.5.

[0042] Furthermore, the subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -40≤arctan(1 / K(S14))≤0.

[0043] Furthermore, the radius of curvature R14 of the object side of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3≤|R14 / F|≤17.

[0044] Furthermore, the distance T(10-14) from the center of the object side of the fifth lens to the center of the object side of the seventh lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.1≤T(10-14) / TTL≤0.6.

[0045] Furthermore, the temperature coefficient of refractive index of the fourth lens, that is, the change of the material refractive index of the fourth lens with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following: -3E+06≤F4 / (dn / dt(4))≤-6E+05.

[0046] Furthermore, the temperature coefficient of refractive index of the sixth lens, that is, the change of the material refractive index of the sixth lens with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following: -3E+06≤F6 / (dn / dt(6))≤-2E+05.

[0047] Furthermore, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: F3 / F≥0.

[0048] According to another aspect of the present invention, an optical lens is provided, comprising, in sequence along the optical axis from the object side to the image 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 maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / FOV≤0.03.

[0049] Furthermore, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave.

[0050] Furthermore, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave.

[0051] Furthermore, the object-side surface of the second lens is concave, and the image-side surface of the second lens is convex.

[0052] Furthermore, the object-side surface of the third lens is concave, and the image-side surface of the third lens is convex.

[0053] Furthermore, the object-side surface of the third lens is convex, and the image-side surface of the third lens is also convex.

[0054] Furthermore, the object-side surface of the fourth lens is concave, and the image-side surface of the fourth lens is convex.

[0055] Furthermore, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is also convex.

[0056] Furthermore, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is concave.

[0057] Furthermore, the object-side surface of the sixth lens is convex, and the image-side surface of the sixth lens is also convex.

[0058] Furthermore, the object-side surface of the seventh lens is convex, and the image-side surface of the seventh lens is concave.

[0059] Furthermore, the object-side surface of the seventh lens is concave, and the image-side surface of the seventh lens is also concave.

[0060] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens or between the third lens and the fourth lens.

[0061] Furthermore, the first lens is an aspherical lens and / or the seventh lens is an aspherical lens.

[0062] Furthermore, the seventh lens is a recurve lens.

[0063] Furthermore, the fifth lens and the sixth lens are cemented together to form a cemented lens.

[0064] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: TTL / H / FOV≤0.04.

[0065] Furthermore, the maximum field of view (FOV) of the optical lens in radians θ, the total focal length (F) of the optical lens, and the maximum aperture (D) of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.8.

[0066] Furthermore, the maximum aperture D of the object 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 FOV of the optical lens satisfy the following condition: 0.3≤D / H / θ≤0.8.

[0067] Furthermore, the combined focal length F34 of the third and fourth lenses and the overall focal length F of the optical lens satisfy the following relationship: 1≤F34 / F≤4.

[0068] Furthermore, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -3≤F1 / F≤-0.5.

[0069] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view FOV of the optical lens satisfy the following: 5≤TTL / θ / 2≤10.

[0070] 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: 72 ≤ (FOV × F) / H ≤ 85.

[0071] 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 FOV of the optical lens satisfy the following condition: 0.1≤|(HF*θ) / (F*θ)|≤0.4.

[0072] 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 FOV of the optical lens satisfy the following condition: 0.3≤(H / 2) / (F*tan(θ / 2))≤0.6.

[0073] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following relationship: |F2 / F|≥1.

[0074] Furthermore, the F-number FNO of the optical lens satisfies: FNO≤1.7.

[0075] Furthermore, the angle subtended by the first lens of the optical lens at the maximum field of view of the image side is arctan(1 / K(S2)) which satisfies: 20≤arctan(1 / K(S2))≤60, where K is the edge slope of the lens at the maximum field of view of the image side of the first lens, and S2 is the image side of the first lens.

[0076] Furthermore, the central radius of curvature R3 of the object side of the second lens and the central radius of curvature R4 of the image side of the second lens satisfy the following condition: 0.3≤R3 / R4≤2.

[0077] Furthermore, the center thickness T2 of the object side of the second lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T2 / TTL≤0.4.

[0078] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.3 ≤ F3 / F4 ≤ 2.

[0079] Furthermore, the radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 0 ≤ |R5 / R6| ≤ 19.

[0080] Furthermore, the object-side center thickness T3 of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T3 / TTL≤0.3.

[0081] Furthermore, the central radius of curvature R7 of the object side of the fourth lens and the central radius of curvature R8 of the image side of the fourth lens satisfy the following condition: 0.1≤|R7 / R8|≤10.

[0082] Furthermore, the object-side center thickness T4 of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: T4 / TTL≤0.4.

[0083] Furthermore, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: F5 / F≤0.

[0084] Furthermore, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the following condition: -4≤F5 / F6≤-0.5.

[0085] Furthermore, the subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -40≤arctan(1 / K(S14))≤0.

[0086] Furthermore, the radius of curvature R14 of the object side of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3≤|R14 / F|≤17.

[0087] Furthermore, the distance T(10-14) from the center of the object side of the fifth lens to the center of the object side of the seventh lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.1≤T(10-14) / TTL≤0.6.

[0088] Furthermore, the temperature coefficient of refractive index of the fourth lens, that is, the change of the material refractive index of the fourth lens with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following: -3E+06≤F4 / (dn / dt(4))≤-6E+05.

[0089] Furthermore, the temperature coefficient of refractive index of the sixth lens, that is, the change of the material refractive index of the sixth lens with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following: -3E+06≤F6 / (dn / dt(6))≤-2E+05.

[0090] Furthermore, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: F3 / F≥0.

[0091] According to another aspect of the present invention, an electronic device is provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0092] According to the technical solution of this invention, the optical lens includes, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in sequence. The first lens has negative optical power, and at least one of its object-side and image-side surfaces is concave. The second lens has optical power, and its object-side surface is concave, while its image-side surface is convex. The third lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. The fourth lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. The fifth lens has negative optical power, and its object-side and image-side surfaces are convex and concave. The sixth lens has positive optical power, and its object-side and image-side surfaces are convex. The seventh lens has optical power, and at least one of its object-side and image-side surfaces is concave.

[0093] The first lens has negative optical power, which causes it to diverge light rays passing through it, ensuring that the emitted light rays maintain an upward trajectory. Under the same field of view, light rays emanating from the image side of the first lens can provide a larger light-receiving surface for subsequent optical systems. By properly controlling the surface shape of the first lens, the angle of incidence of light rays on the object side of the first lens can be made smaller, allowing the light rays to reach the subsequent optical system smoothly and facilitating the achievement of a large field of view.

[0094] The second lens can have either positive or negative optical power. When the second lens has positive optical power, it has little effect on the improvement of light trajectory; the light rays exiting through the second lens still maintain an upward trajectory. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane. When the second lens has negative optical power, it has a diverging effect on the light rays. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane. The object-side surface of the second lens is concave and crescent-shaped, collecting light rays that have passed through the first lens. Because the curvature of the object-side surface and the image-side surface of the second lens are similar, it is beneficial for the light rays to transition smoothly on the second lens, reducing sensitivity. At the same time, the concave object-side surface of the second lens, in conjunction with the concave image-side surface of the first lens, can reduce the front diameter of the lens, reduce the volume, and facilitate miniaturization and cost reduction.

[0095] The third lens has positive optical power and converges light rays. On the one hand, it allows diverging light rays to smoothly enter the rear optical system, and on the other hand, it can lower the position of the light rays entering the subsequent optical system, reduce the rear port diameter, and achieve miniaturization.

[0096] The fourth lens has positive optical power and plays a role in further converging light, so that the light can smoothly transition to the rear lens after passing through the third and fourth lenses. At the same time, the converging effect of the fourth lens can further reduce the rear port diameter to ensure miniaturization.

[0097] The fifth lens is connected to at least two lenses with positive optical power in front of it. While changing the direction of light, it also introduces significant aberrations. The fifth lens has negative optical power and has a diverging effect on light. By controlling the focal length of the fifth lens, various aberrations caused by the positive optical power lenses in front can be effectively corrected, improving image quality and optimizing optical performance such as distortion and CRA.

[0098] The sixth lens has positive optical power and converges light rays, which can further reduce aberrations and ensure that the light rays converge effectively and smoothly at the end, so that the light rays reach the imaging surface smoothly, reducing the overall weight and cost.

[0099] The seventh lens has optical power, and at least one of the object side and image side of the seventh lens is concave, so that the seventh lens can smoothly transition the light rays passing through the cemented lens to the imaging plane, correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0100] In addition, the optical lens of this application has the advantages of high resolution, miniaturization, small front end diameter, minimal impact of high and low temperatures on lens resolution, wide operating temperature range, large field of view while also being telephoto, no ghosting, large distortion and large center angle resolution, large aperture and large light intake. Attached Figure Description

[0101] 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:

[0102] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0103] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0104] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0105] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0106] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0107] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0108] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0109] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown.

[0110] The above figures include the following reference numerals:

[0111] STO, Aperture Stop; L1, First Lens; S1, Object-side Face of First Lens; S2, Image-side Face of First Lens; L2, Second Lens; S3, Object-side Face of Second Lens; S4, Image-side Face of Second Lens; L3, Third Lens; S5, Object-side Face of Third Lens; S6, Image-side Face of Third Lens; L4, Fourth Lens; S7, Object-side Face of Fourth Lens; S8, Image-side Face of Fourth Lens; L5, Fifth Lens; S9, Object-side Face of Fifth Lens; S10, Image-side Face of Fifth Lens; L6, Sixth Lens; S10, Object-side Face of Sixth Lens; S11, Image-side Face of Sixth Lens; L7, Seventh Lens; S12, Object-side Face of Seventh Lens; S13, Image-side Face of Seventh Lens; L8, Filter; S14, Object-side Face of Filter; S15, Image-side Face of Filter; S16, Object-side Face of Protective Glass; S17, Image-side Face of Protective Glass; IMA, Imaging Surface. Detailed Implementation

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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 object side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable 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 object-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 image-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.

[0118] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as an automotive lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light rays from the object side can form an image on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0119] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is the image source surface of the optical lens.

[0120] To address the problem that high resolution and miniaturization cannot be simultaneously achieved in existing optical lenses, this invention provides an optical lens and an electronic device incorporating it.

[0121] Example 1

[0122] like Figures 1 to 8 As shown, the optical lens includes, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has negative optical power, and at least one of its object-side and image-side surfaces is concave. The second lens has optical power, and its object-side surface is concave, while its image-side surface is convex. The third lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. The fourth lens has positive optical power, and at least one of its object-side and image-side surfaces is convex. The fifth lens has negative optical power, and its object-side and image-side surfaces are convex and concave. The sixth lens has positive optical power, and its object-side and image-side surfaces are convex. The seventh lens has optical power, and at least one of its object-side and image-side surfaces is concave.

[0123] The first lens has negative optical power, which causes it to diverge light rays passing through it, ensuring that the emitted light rays maintain an upward trajectory. Under the same field of view, light rays emanating from the image side of the first lens can provide a larger light-receiving surface for subsequent optical systems. By properly controlling the surface shape of the first lens, the angle of incidence of light rays on the object side of the first lens can be made smaller, allowing the light rays to reach the subsequent optical system smoothly and facilitating the achievement of a large field of view.

[0124] The second lens can have either positive or negative optical power. When the second lens has positive optical power, it has little effect on the improvement of light trajectory; the light rays exiting through the second lens still maintain an upward trajectory. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane. When the second lens has negative optical power, it has a diverging effect on the light rays. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane. The object-side surface of the second lens is concave and crescent-shaped, collecting light rays that have passed through the first lens. Because the curvature of the object-side surface and the image-side surface of the second lens are similar, it is beneficial for the light rays to transition smoothly on the second lens, reducing sensitivity. At the same time, the concave object-side surface of the second lens, in conjunction with the concave image-side surface of the first lens, can reduce the front diameter of the lens, reduce the volume, and facilitate miniaturization and cost reduction.

[0125] The third lens has positive optical power and converges light rays. On the one hand, it allows diverging light rays to smoothly enter the rear optical system, and on the other hand, it can lower the position of the light rays entering the subsequent optical system, reduce the rear port diameter, and achieve miniaturization.

[0126] The fourth lens has positive optical power and plays a role in further converging light, so that the light can smoothly transition to the rear lens after passing through the third and fourth lenses. At the same time, the converging effect of the fourth lens can further reduce the rear port diameter to ensure miniaturization.

[0127] The fifth lens is connected to at least two lenses with positive optical power in front of it. While changing the direction of light, it also introduces significant aberrations. The fifth lens has negative optical power and has a diverging effect on light. By controlling the focal length of the fifth lens, various aberrations caused by the positive optical power lenses in front can be effectively corrected, improving image quality and optimizing optical performance such as distortion and CRA.

[0128] The sixth lens has positive optical power and converges light rays, which can further reduce aberrations and ensure that the light rays converge effectively and smoothly at the end, so that the light rays reach the imaging surface smoothly, reducing the overall weight and cost.

[0129] The seventh lens has optical power, and at least one of the object side and image side of the seventh lens is concave, so that the seventh lens can smoothly transition the light rays passing through the cemented lens to the imaging plane, correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0130] In addition, the optical lens of this application has the advantages of high resolution, miniaturization, small front end diameter, minimal impact of high and low temperatures on lens resolution, wide operating temperature range, large field of view while also being telephoto, no ghosting, large distortion and large center angle resolution, large aperture and large light intake.

[0131] In this embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave. The convexity of the object-side surface of the first lens allows for a smaller angle of incidence of light, enabling it to reach the rear optical system smoothly and facilitating a large field of view.

[0132] In this embodiment, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave. The concave object-side surface of the first lens allows light to have a smaller incident angle, enabling it to reach the rear optical system smoothly, which is beneficial for achieving a large field of view. At the same time, in conjunction with the concave image-side surface of the first lens, a smaller aperture can be achieved, thus achieving miniaturization.

[0133] In this embodiment, the object-side surface of the third lens is concave, and the image-side surface of the third lens is convex. This makes the shape of the object-side surface of the third lens similar to that of the image-side surface of the second lens, which makes the light path between the second and third lenses smoother. Therefore, the light emitted from the second lens is well received by the third lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0134] In this embodiment, both the object-side and image-side surfaces of the third lens are convex. This results in a significant difference in shape between the image-side and object-side surfaces of the second and third lenses, leading to a noticeable change in the light path caused by the third lens. Furthermore, with the same object-side aperture of the third lens, the front aperture of the lens can be reduced, achieving miniaturization of the optical lens.

[0135] In this embodiment, the object-side surface of the fourth lens is concave, and the image-side surface of the fourth lens is convex. This makes the shape of the object-side surface of the fourth lens similar to that of the image-side surface of the third lens, which makes the light path between the third and fourth lenses smoother. Therefore, the light emitted from the third lens is well received by the fourth lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0136] In this embodiment, both the object-side and image-side surfaces of the fourth lens are convex. This results in a significant difference in shape between the image-side and object-side surfaces of the third lens, leading to a noticeable change in the light path caused by the fourth lens. Furthermore, with the same aperture of the fourth lens, the front aperture of the lens can be reduced, achieving miniaturization.

[0137] In this embodiment, the seventh lens has negative optical power, its object-side surface is convex, and its image-side surface is concave. Because of its negative optical power and aspherical nature, the seventh lens can smoothly transition light rays from the cemented lens to the imaging plane, correcting astigmatism and field curvature, and improving the resolving power of the optical system.

[0138] In this embodiment, the seventh lens has negative optical power, and both its object-side and image-side surfaces are concave. Because of its negative optical power and aspherical nature, the seventh lens can smoothly transition light rays from the cemented lens to the imaging plane, correcting astigmatism and field curvature, and improving the resolving power of the optical system.

[0139] In this embodiment, the seventh lens has positive optical power, its object-side surface is convex, and its image-side surface is concave. The seventh lens has positive optical power, causing minimal alteration to the light trajectory, allowing light rays passing through the cemented lens to smoothly transition to the imaging plane. Furthermore, as an aspherical lens, it effectively corrects astigmatism and field curvature, improving the resolving power of the optical system.

[0140] In this embodiment, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens, or between the third lens and the fourth lens. This helps the aperture stop to converge the light rays before and after the lens, shorten the overall length of the optical system, and reduce the aperture of the front and rear lens groups.

[0141] In this embodiment, the first lens is an aspherical lens. This allows for a large R-value at the center of the object-side surface and a relatively gentle edge. A small R-value enables the achievement of large angular resolution and high distortion at the center. The seventh lens is also an aspherical lens. The use of aspherical lenses for both the first and seventh lenses is beneficial for achieving high distortion and large angular resolution at the center, correcting field curvature and astigmatism, and improving resolving power.

[0142] In this embodiment, the seventh lens is a recurved lens. The object-side surface and image-side surface at the center of the seventh lens are convex and concave, respectively, while the object-side surface and image-side surface at the circumferential position of the seventh lens are concave and convex, respectively; alternatively, both the object-side surface and image-side surface at the center of the seventh lens are concave, while the object-side surface and image-side surface at the circumferential position of the seventh lens are concave and convex, respectively. The recurved nature of the seventh lens is beneficial for correcting astigmatism and field curvature.

[0143] In this embodiment, the fifth and sixth lenses are cemented together to form a cemented lens. The cemented lens consists of a negative power lens and a positive power lens. After the fifth and sixth lenses are cemented together, the light rays travel almost identically on the object side of the sixth lens and the image side of the fifth lens, with no significant refraction. Therefore, the light rays emitted from the fifth lens are well received by the sixth lens, reducing light loss in each field of view and improving the relative illumination of each field of view. Because the light rays are excessively smooth at the cemented surface, i.e., the cemented surface between the image side of the fifth lens and the object side of the sixth lens, the light ray trajectory will not change significantly when the two lenses are tilted or misaligned during assembly, reducing the sensitivity of the lenses during assembly. The reduced air gap between the second and third lenses after the fifth and sixth lenses are cemented together can reduce the overall system length, and assembling the second and third lenses as a whole can also reduce assembly steps.

[0144] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens, satisfy the following condition: TTL / H / FOV ≤ 0.04. By reasonably constraining this condition, miniaturization is facilitated. Preferably, TTL / H / FOV ≤ 0.038.

[0145] In this embodiment, the maximum aperture D of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.03. By reasonably constraining the relationship between the maximum aperture D of the object-side surface of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens, it is beneficial to ensure a small front-end diameter, further ensuring the miniaturization feature. Preferably, D / H / FOV ≤ 0.025.

[0146] In this embodiment, the radian value θ of the maximum field of view (FOV) of the optical lens, the total focal length F of the optical lens, and the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.8. By reasonably constraining this condition, a small front aperture can be ensured, which is beneficial for miniaturization. Preferably, 0.8 ≤ (θ*F) / D ≤ 1.5.

[0147] In this embodiment, the maximum aperture D of the object 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 (FOV) of the optical lens satisfy the following condition: 0.3 ≤ D / H / θ ≤ 0.8. By reasonably constraining this condition, a small front aperture can be ensured, which is beneficial for miniaturization. Preferably, 0.4 ≤ D / H / θ ≤ 0.7.

[0148] In this embodiment, the combined focal length F34 of the third and fourth lenses and the overall focal length F of the optical lens satisfy the condition: 1 ≤ F34 / F ≤ 4. By constraining the focal lengths of the third and fourth lenses within a certain range, the light path between the second and fifth lenses is controlled, reducing aberrations caused by large-angle light rays entering through the second lens. Simultaneously, the third and fourth lenses, being positive lenses, suppress light rays, reducing the rear aperture and achieving miniaturization. Preferably, 1.2 ≤ F34 / F ≤ 3.

[0149] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -3 ≤ F1 / F ≤ -0.5. By rationally allocating the focal length of the first lens, it is beneficial for light rays with a large field of view to enter the optical system. Preferably, -2 ≤ F1 / F ≤ -1.

[0150] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view (FOV) of the optical lens, satisfy the condition: 5 ≤ TTL / θ / 2 ≤ 10. By reasonably constraining this condition, both a large field of view and miniaturization are satisfied, which is beneficial for reducing costs. Preferably, 6 ≤ TTL / θ / 2 ≤ 9.

[0151] 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 following condition: 72 ≤ (FOV × F) / H ≤ 85. By reasonably constraining this condition, both telephoto and large field of view are satisfied; this helps the optical lens to balance a large field of view and miniaturization, achieving a large central angular resolution. Preferably, 73 ≤ (FOV × F) / H ≤ 80.

[0152] 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 (FOV) of the optical lens satisfy the following condition: 0.1 ≤ |(HF*θ) / (F*θ)| ≤ 0.4. By reasonably constraining this condition, the field of view is increased while keeping the image plane size constant, thus achieving large distortion. Preferably, 0.2 ≤ |(HF*θ) / (F*θ)| ≤ 0.3.

[0153] 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 (FOV) of the optical lens satisfy the following condition: 0.3 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.6. By reasonably constraining this condition, it is ensured that while the field of view and the size of the imaging plane remain unchanged, reducing the focal length of the lens enhances the imaging effect in the central area of ​​the imaging plane. Preferably, 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.55

[0154] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the condition |F2 / F|≥1. By rationally allocating the optical power of the second lens, making it a negative lens or with a large focal length, aberrations are altered without causing light convergence. This facilitates a larger aperture and allows for greater light intake, thus increasing the brightness of the imaging plane. Preferably, |F2 / F|≥2.

[0155] In this embodiment, the F-number (FNO) of the optical lens satisfies: FNO ≤ 1.7. By constraining this condition, the first and second lenses can be rationally allocated, thereby reducing the F-number, achieving a large aperture, and increasing the amount of light entering the lens. Preferably, FNO ≤ 1.6.

[0156] In this embodiment, the angle subtended by the first lens at its maximum field of view on the image side, arctan(1 / K(S2)), satisfies: 20 ≤ arctan(1 / K(S2)) ≤ 60°, where K is the edge slope of the first lens at its maximum field of view on the image side, and S2 is the image side surface of the first lens. Constraining the angle subtended by the first lens at its maximum field of view on the image side facilitates rapid focusing and improves image quality. Preferably, 25 ≤ arctan(1 / K(S2)) ≤ 55°.

[0157] In this embodiment, the central radius of curvature R3 of the object-side surface of the second lens and the central radius of curvature R4 of the image-side surface of the second lens satisfy the condition: 0.3 ≤ R3 / R4 ≤ 2. By constraining this condition, the radii of curvature of the object-side and image-side surfaces of the second lens are made close, making the shape of the second lens nearly concentric, which is beneficial for smooth light transition and improves image quality. Preferably, 0.35 ≤ R3 / R4 ≤ 1.5.

[0158] In this embodiment, the center thickness T2 of the object-side surface of the second lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object-side surface of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T2 / TTL≤0.4. By constraining this condition, the thickness of the second lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization and reducing costs. Preferably, T2 / TTL≤0.25.

[0159] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.3 ≤ F3 / F4 ≤ 2. By reasonably constraining this condition, the focal lengths of the third and fourth lenses are made similar, which helps to smooth the light transition and is beneficial to image quality improvement. Preferably, 0.4 ≤ F3 / F4 ≤ 1.5.

[0160] In this embodiment, the central radius of curvature R5 of the object-side surface of the third lens and the central radius of curvature R6 of the image-side surface of the third lens satisfy the following condition: 0 ≤ |R5 / R6| ≤ 19. By reasonably matching the R values ​​of the object-side and image-side surfaces of the third lens, aberrations can be corrected, and the thickness of the third lens can be reduced while maintaining the same imaging surface size, thus achieving miniaturization. Preferably, 0.2 ≤ |R5 / R6| ≤ 16.

[0161] In this embodiment, the thickness T3 of the object-side center of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object-side center of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T3 / TTL≤0.3. By reasonably constraining this condition, the thickness of the third lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization, and thus reducing costs. Preferably, T3 / TTL≤0.15.

[0162] In this embodiment, the central radius of curvature R7 of the object-side surface of the fourth lens and the central radius of curvature R8 of the image-side surface of the fourth lens satisfy the following condition: 0.1 ≤ |R7 / R8| ≤ 10. By reasonably matching the R values ​​of the object-side and image-side surfaces of the fourth lens, aberrations can be corrected, and the thickness of the fourth lens can be reduced while maintaining the same imaging surface size, thus achieving lens miniaturization. Preferably, 0.3 ≤ |R7 / R8| ≤ 9.

[0163] In this embodiment, the thickness T4 of the center of the object side of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T4 / TTL≤0.4. By reasonably constraining this condition, the thickness of the fourth lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization, and thus reducing costs. Preferably, T4 / TTL≤0.2.

[0164] In this embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the condition: F5 / F≤0. The negative focal length F5 of the fifth lens can correct aberrations caused by the front positive lens. Preferably, F5 / F≤-0.5.

[0165] In this embodiment, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the condition: -4 ≤ F5 / F6 ≤ -0.5. By reasonably constraining this condition, the focal lengths of the cemented lenses are made similar, and the positive and negative optical powers are cemented together with opposite polarities, which helps to smooth the light transition and correct chromatic aberration. Preferably, -2.5 ≤ F5 / F6 ≤ -1.

[0166] In this embodiment, the subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -40≤arctan(1 / K(S14))≤0. This setting causes the subtended angle of the seventh lens at the maximum field of view of the object side to bend towards the object side, which is beneficial for correcting astigmatism and field curvature. Preferably, -38≤arctan(1 / K(S14))≤-0.4.

[0167] In this embodiment, the central curvature radius R14 of the object-side surface of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3 ≤ |R14 / F| ≤ 17. This setting results in a larger central curvature radius R14 of the object-side surface of the seventh lens, which helps to smooth the light transition and reduces the sensitivity of the system. Preferably, 3.5 ≤ |R14 / F| ≤ 14.

[0168] In this embodiment, the distance T(10-14) between the center of the object-side surface of the fifth lens and the center of the object-side surface of the seventh lens, and the total optical length of the optical lens, i.e., the distance TTL between the center of the object-side surface of the first lens and the center of the imaging plane of the optical lens, satisfy the following condition: 0.1 ≤ T(10-14) / TTL ≤ 0.6. By reasonably controlling the distance between the fifth and seventh lenses, the ghosting energy level can be reduced, further reducing the risk of ghosting. Preferably, 0.2 ≤ T(10-14) / TTL ≤ 0.4.

[0169] In this embodiment, the temperature coefficient of refractive index of the fourth lens, i.e., the change in the refractive index of the fourth lens material with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following relationship: -3E+06≤F4 / (dn / dt(4))≤-6E+05. This setting helps to obtain good resolution at both high and low temperatures, improving the thermal stability of the system. Preferably, -2E+06≤F4 / (dn / dt(4))≤-7E+05.

[0170] In this embodiment, the temperature coefficient of refractive index of the sixth lens, i.e., the change in the refractive index of the sixth lens material with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following relationship: -3E+06≤F6 / (dn / dt(6))≤-2E+05. This helps to obtain good resolution at both high and low temperatures and improves the thermal stability of the system. Preferably, -2E+06≤F6 / (dn / dt(6))≤-3E+05.

[0171] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the condition: F3 / F ≥ 0. This ensures that the third lens has a positive optical power, converging light rays. On the one hand, this allows diverging light rays to smoothly enter the rear optical system; on the other hand, it lowers the position of the light rays entering the subsequent optical system, reducing the rear aperture and achieving miniaturization. Preferably, F3 / F ≥ 1.

[0172] Example 2

[0173] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially from the object side to the image side along the optical axis. The first lens has negative optical power; the second lens has optical power; the third lens has positive optical power; the fourth lens has positive optical power; the fifth lens has negative optical power; the sixth lens has positive optical power; and the seventh lens has optical power. The maximum aperture D of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / FOV≤0.03.

[0174] Preferably, D / H / FOV ≤ 0.025.

[0175] The first lens has negative optical power, which allows it to diverge light rays passing through it, ensuring that the emitted light rays maintain an upward trend. Under the same field of view, the light rays emitted from the image side of the first lens can provide a larger light-receiving surface for subsequent optical systems. The second lens can have either positive or negative optical power. When the second lens has positive optical power, it has little effect on the improvement of light trajectory; the light rays exiting through the second lens still maintain an upward trajectory. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane. When the second lens has negative optical power, it has a diverging effect on the light rays. Under the same field of view, the light rays exiting from the image side of the first lens, after being transitioned by the second lens, allow the subsequent light system to have a larger light-receiving surface. This is beneficial for expanding the image plane and also allows for a larger physical aperture of the stop, resulting in a larger aperture and a greater amount of light entering the camera, thus increasing the brightness of the image plane.

[0176] The third lens has positive optical power and converges light rays. On the one hand, it allows diverging light rays to smoothly enter the rear optical system, and on the other hand, it can lower the position of the light rays entering the subsequent optical system, reduce the rear port diameter, and achieve miniaturization.

[0177] The fourth lens has positive optical power and plays a role in further converging light, so that the light can smoothly transition to the rear lens after passing through the third and fourth lenses. At the same time, the converging effect of the fourth lens can further reduce the rear port diameter to ensure miniaturization.

[0178] The fifth lens is connected to at least two lenses with positive optical power in front of it. While changing the direction of light, it also introduces significant aberrations. The fifth lens has negative optical power and has a diverging effect on light. By controlling the focal length of the fifth lens, various aberrations caused by the positive optical power lenses in front can be effectively corrected, improving image quality and optimizing optical performance such as distortion and CRA.

[0179] The sixth lens has positive optical power and converges light rays, further reducing aberrations and ensuring smooth and efficient convergence of light rays at the final point, allowing them to reach the imaging plane smoothly and reducing overall weight and cost. By rationally constraining the relationship between the maximum aperture D of the first lens's object side corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens, it is beneficial to ensure a small front aperture, further guaranteeing miniaturization.

[0180] The seventh lens has optical power, and at least one of the object side and image side of the seventh lens is concave, so that the seventh lens can smoothly transition the light rays passing through the cemented lens to the imaging plane, correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0181] In addition, the optical lens of this application has the advantages of high resolution, miniaturization, small front end diameter, minimal impact of high and low temperatures on lens resolution, wide operating temperature range, large field of view while also being telephoto, no ghosting, large distortion and large center angle resolution, large aperture and large light intake.

[0182] In this embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave. The convexity of the object-side surface of the first lens allows for a smaller angle of incidence of light, enabling it to reach the rear optical system smoothly and facilitating a large field of view.

[0183] In this embodiment, the object-side surface of the first lens is concave, and the image-side surface of the first lens is also concave. The concave object-side surface of the first lens allows light to have a smaller incident angle, enabling it to reach the rear optical system smoothly, which is beneficial for achieving a large field of view. At the same time, in conjunction with the concave image-side surface of the first lens, a smaller aperture can be achieved, thus achieving miniaturization.

[0184] In this embodiment, the object-side surface of the second lens is concave, and the image-side surface is convex. The concave object-side surface of the second lens, in a crescent shape, collects light rays entering through the first lens. Because the curvatures of the object-side and image-side surfaces of the second lens are similar, it facilitates a smooth transition of light rays on the second lens, reducing sensitivity. At the same time, the concave object-side surface of the second lens, in conjunction with the concave image-side surface of the first lens, allows for a reduction in the front aperture of the lens, reducing its size and facilitating miniaturization and cost reduction.

[0185] In this embodiment, the object-side surface of the third lens is concave, and the image-side surface of the third lens is convex. This makes the shape of the object-side surface of the third lens similar to that of the image-side surface of the second lens, which makes the light path between the second and third lenses smoother. Therefore, the light emitted from the second lens is well received by the third lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0186] In this embodiment, both the object-side and image-side surfaces of the third lens are convex. This results in a significant difference in shape between the image-side and object-side surfaces of the second and third lenses, leading to a noticeable change in the light path caused by the third lens. Furthermore, with the same object-side aperture of the third lens, the front aperture of the lens can be reduced, achieving miniaturization of the optical lens.

[0187] In this embodiment, the object-side surface of the fourth lens is concave, and the image-side surface of the fourth lens is convex. This makes the shape of the object-side surface of the fourth lens similar to that of the image-side surface of the third lens, which makes the light path between the third and fourth lenses smoother. Therefore, the light emitted from the third lens is well received by the fourth lens, reducing the loss of light in each field of view and improving the relative illumination of each field of view.

[0188] In this embodiment, both the object-side and image-side surfaces of the fourth lens are convex. This results in a significant difference in shape between the image-side and object-side surfaces of the third lens, leading to a noticeable change in the light path caused by the fourth lens. Furthermore, with the same aperture of the fourth lens, the front aperture of the lens can be reduced, achieving miniaturization.

[0189] In this embodiment, the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is concave.

[0190] In this embodiment, both the object-side and image-side surfaces of the sixth lens are convex. This allows the light rays to converge effectively and smoothly at the final point, ensuring a stable arrival of the light on the imaging surface and reducing overall weight and cost.

[0191] In this embodiment, the object-side surface of the seventh lens is convex, and the image-side surface is concave. When the seventh lens has negative optical power and is aspherical, it can smoothly transition light rays passing through the cemented lens to the imaging plane, correcting astigmatism and field curvature, and improving the resolving power of the optical system. When the seventh lens has positive optical power, it causes less change to the light trajectory, allowing light rays passing through the cemented lens to smoothly transition to the imaging plane. Simultaneously, as an aspherical lens, it can effectively correct astigmatism and field curvature, further improving the resolving power of the optical system.

[0192] In this embodiment, the object-side surface of the seventh lens is concave, and the image-side surface of the seventh lens is also concave. The seventh lens has negative optical power and is aspherical, which can smoothly transition the light rays passing through the cemented lens to the imaging plane, correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0193] In this embodiment, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens, or between the third lens and the fourth lens. This helps the aperture stop to converge the light rays before and after the lens, shorten the overall length of the optical system, and reduce the aperture of the front and rear lens groups.

[0194] In this embodiment, both the first and seventh lenses are aspherical lenses. This allows the first lens to exhibit a large R-value at the center of its object-side surface and a relatively gentle edge. The smaller R-value enables the achievement of large angular resolution and high distortion at the center. The seventh lens is an aspherical lens. The use of aspherical lenses for both the first and seventh lenses is beneficial for achieving high distortion and large angular resolution at the center, correcting field curvature and astigmatism, and improving resolving power.

[0195] In this embodiment, the seventh lens is a recurved lens. The object-side surface and image-side surface at the center of the seventh lens are convex and concave, respectively, while the object-side surface and image-side surface at the circumferential position of the seventh lens are concave and convex, respectively; alternatively, both the object-side surface and image-side surface at the center of the seventh lens are concave, while the object-side surface and image-side surface at the circumferential position of the seventh lens are concave and convex, respectively. The recurved nature of the seventh lens is beneficial for correcting astigmatism and field curvature.

[0196] In this embodiment, the fifth and sixth lenses are cemented together to form a cemented lens. The cemented lens consists of a negative power lens and a positive power lens. After the fifth and sixth lenses are cemented together, the light rays travel almost identically on the object side of the sixth lens and the image side of the fifth lens, with no significant refraction. Therefore, the light rays emitted from the fifth lens are well received by the sixth lens, reducing light loss in each field of view and improving the relative illumination of each field of view. Because the light rays are excessively smooth at the cemented surface, i.e., the cemented surface between the image side of the fifth lens and the object side of the sixth lens, the light ray trajectory will not change significantly when the two lenses are tilted or misaligned during assembly, reducing the sensitivity of the lenses during assembly. The reduced air gap between the second and third lenses after the fifth and sixth lenses are cemented together can reduce the overall system length, and assembling the second and third lenses as a whole can also reduce assembly steps.

[0197] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens, satisfy the following condition: TTL / H / FOV ≤ 0.04. By reasonably constraining this condition, miniaturization is facilitated. Preferably, TTL / H / FOV ≤ 0.038.

[0198] In this embodiment, the radian value θ of the maximum field of view (FOV) of the optical lens, the total focal length F of the optical lens, and the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.8. By reasonably constraining this condition, a small front aperture can be ensured, which is beneficial for miniaturization. Preferably, 0.8 ≤ (θ*F) / D ≤ 1.5.

[0199] In this embodiment, the maximum aperture D of the object 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 (FOV) of the optical lens satisfy the following condition: 0.3 ≤ D / H / θ ≤ 0.8. By reasonably constraining this condition, a small front aperture can be ensured, which is beneficial for miniaturization. Preferably, 0.4 ≤ D / H / θ ≤ 0.7.

[0200] In this embodiment, the combined focal length F34 of the third and fourth lenses and the overall focal length F of the optical lens satisfy the condition: 1 ≤ F34 / F ≤ 4. By constraining the focal lengths of the third and fourth lenses within a certain range, the light path between the second and fifth lenses is controlled, reducing aberrations caused by large-angle light rays entering through the second lens. Simultaneously, the third and fourth lenses, being positive lenses, suppress light rays, reducing the rear aperture and achieving miniaturization. Preferably, 1.2 ≤ F34 / F ≤ 3.

[0201] In this embodiment, the focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -3 ≤ F1 / F ≤ -0.5. By rationally allocating the focal length of the first lens, it is beneficial for light rays with a large field of view to enter the optical system. Preferably, -2 ≤ F1 / F ≤ -1.

[0202] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view (FOV) of the optical lens, satisfy the condition: 5 ≤ TTL / θ / 2 ≤ 10. By reasonably constraining this condition, both a large field of view and miniaturization are satisfied, which is beneficial for reducing costs. Preferably, 6 ≤ TTL / θ / 2 ≤ 9.

[0203] 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 following condition: 72 ≤ (FOV × F) / H ≤ 85. By reasonably constraining this condition, both telephoto and large field of view are satisfied; this helps the optical lens to balance a large field of view and miniaturization, achieving a large central angular resolution. Preferably, 73 ≤ (FOV × F) / H ≤ 80.

[0204] 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 (FOV) of the optical lens satisfy the following condition: 0.1 ≤ |(HF*θ) / (F*θ)| ≤ 0.4. By reasonably constraining this condition, the field of view is increased while keeping the image plane size constant, thus achieving large distortion. Preferably, 0.2 ≤ |(HF*θ) / (F*θ)| ≤ 0.3.

[0205] 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 (FOV) of the optical lens satisfy the following condition: 0.3 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.6. By reasonably constraining this condition, it is ensured that while the field of view and the size of the imaging plane remain unchanged, reducing the focal length of the lens enhances the imaging effect in the central area of ​​the imaging plane. Preferably, 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 0.55

[0206] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the condition |F2 / F|≥1. By rationally allocating the optical power of the second lens, making it a negative lens or with a large focal length, aberrations are altered without causing light convergence. This facilitates a larger aperture and allows for greater light intake, thus increasing the brightness of the imaging plane. Preferably, |F2 / F|≥2.

[0207] In this embodiment, the F-number (FNO) of the optical lens satisfies: FNO ≤ 1.7. By constraining this condition, the first and second lenses can be rationally allocated, thereby reducing the F-number, achieving a large aperture, and increasing the amount of light entering the lens. Preferably, FNO ≤ 1.6.

[0208] In this embodiment, the angle subtended by the first lens at its maximum field of view on the image side, arctan(1 / K(S2)), satisfies: 20 ≤ arctan(1 / K(S2)) ≤ 60°, where K is the edge slope of the first lens at its maximum field of view on the image side, and S2 is the image side surface of the first lens. Constraining the angle subtended by the first lens at its maximum field of view on the image side facilitates rapid focusing and improves image quality. Preferably, 25 ≤ arctan(1 / K(S2)) ≤ 55°.

[0209] In this embodiment, the central radius of curvature R3 of the object-side surface of the second lens and the central radius of curvature R4 of the image-side surface of the second lens satisfy the condition: 0.3 ≤ R3 / R4 ≤ 2. By constraining this condition, the radii of curvature of the object-side and image-side surfaces of the second lens are made close, making the shape of the second lens nearly concentric, which is beneficial for smooth light transition and improves image quality. Preferably, 0.35 ≤ R3 / R4 ≤ 1.5.

[0210] In this embodiment, the center thickness T2 of the object-side surface of the second lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object-side surface of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T2 / TTL≤0.4. By constraining this condition, the thickness of the second lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization and reducing costs. Preferably, T2 / TTL≤0.25.

[0211] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.3 ≤ F3 / F4 ≤ 2. By reasonably constraining this condition, the focal lengths of the third and fourth lenses are made similar, which helps to smooth the light transition and is beneficial to image quality improvement. Preferably, 0.4 ≤ F3 / F4 ≤ 1.5.

[0212] In this embodiment, the central radius of curvature R5 of the object-side surface of the third lens and the central radius of curvature R6 of the image-side surface of the third lens satisfy the following condition: 0 ≤ |R5 / R6| ≤ 19. By reasonably matching the R values ​​of the object-side and image-side surfaces of the third lens, aberrations can be corrected, and the thickness of the third lens can be reduced while maintaining the same imaging surface size, thus achieving miniaturization. Preferably, 0.2 ≤ |R5 / R6| ≤ 16.

[0213] In this embodiment, the thickness T3 of the object-side center of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object-side center of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T3 / TTL≤0.3. By reasonably constraining this condition, the thickness of the third lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization, and thus reducing costs. Preferably, T3 / TTL≤0.15.

[0214] In this embodiment, the central radius of curvature R7 of the object-side surface of the fourth lens and the central radius of curvature R8 of the image-side surface of the fourth lens satisfy the following condition: 0.1 ≤ |R7 / R8| ≤ 10. By reasonably matching the R values ​​of the object-side and image-side surfaces of the fourth lens, aberrations can be corrected, and the thickness of the fourth lens can be reduced while maintaining the same imaging surface size, thus achieving lens miniaturization. Preferably, 0.3 ≤ |R7 / R8| ≤ 9.

[0215] In this embodiment, the thickness T4 of the center of the object side of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: T4 / TTL≤0.4. By reasonably constraining this condition, the thickness of the fourth lens is made thinner, which is beneficial to reducing the lens TTL, achieving miniaturization, and thus reducing costs. Preferably, T4 / TTL≤0.2.

[0216] In this embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the condition: F5 / F≤0. The negative focal length F5 of the fifth lens can correct aberrations caused by the front positive lens. Preferably, F5 / F≤-0.5.

[0217] In this embodiment, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the condition: -4 ≤ F5 / F6 ≤ -0.5. By reasonably constraining this condition, the focal lengths of the cemented lenses are made similar, and the positive and negative optical powers are cemented together with opposite polarities, which helps to smooth the light transition and correct chromatic aberration. Preferably, -2.5 ≤ F5 / F6 ≤ -1.

[0218] In this embodiment, the subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -40≤arctan(1 / K(S14))≤0. This setting causes the subtended angle of the seventh lens at the maximum field of view of the object side to bend towards the object side, which is beneficial for correcting astigmatism and field curvature. Preferably, -38≤arctan(1 / K(S14))≤-0.4.

[0219] In this embodiment, the central curvature radius R14 of the object-side surface of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3 ≤ |R14 / F| ≤ 17. This setting results in a larger central curvature radius R14 of the object-side surface of the seventh lens, which helps to smooth the light transition and reduces the sensitivity of the system. Preferably, 3.5 ≤ |R14 / F| ≤ 14.

[0220] In this embodiment, the distance T(10-14) between the center of the object-side surface of the fifth lens and the center of the object-side surface of the seventh lens, and the total optical length of the optical lens, i.e., the distance TTL between the center of the object-side surface of the first lens and the center of the imaging plane of the optical lens, satisfy the following condition: 0.1 ≤ T(10-14) / TTL ≤ 0.6. By reasonably controlling the distance between the fifth and seventh lenses, the ghosting energy level can be reduced, further reducing the risk of ghosting. Preferably, 0.2 ≤ T(10-14) / TTL ≤ 0.4.

[0221] In this embodiment, the temperature coefficient of refractive index of the fourth lens, i.e., the change in the refractive index of the fourth lens material with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following relationship: -3E+06≤F4 / (dn / dt(4))≤-6E+05. This setting helps to obtain good resolution at both high and low temperatures, improving the thermal stability of the system. Preferably, -2E+06≤F4 / (dn / dt(4))≤-7E+05.

[0222] In this embodiment, the temperature coefficient of refractive index of the sixth lens, i.e., the change in the refractive index of the sixth lens material with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following relationship: -3E+06≤F6 / (dn / dt(6))≤-2E+05. This helps to obtain good resolution at both high and low temperatures and improves the thermal stability of the system. Preferably, -2E+06≤F6 / (dn / dt(6))≤-3E+05.

[0223] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the condition: F3 / F ≥ 0. This ensures that the third lens has a positive optical power, converging light rays. On the one hand, this allows diverging light rays to smoothly enter the rear optical system; on the other hand, it lowers the position of the light rays entering the subsequent optical system, reducing the rear aperture and achieving miniaturization. Preferably, F3 / F ≥ 1.

[0224] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0225] The optical lens in this application may employ multiple lens elements, such as the seven elements described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature 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 aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0226] In an exemplary embodiment, 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 avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. 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 sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to sixth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] It should be noted that any of the examples one through eight below are applicable to all embodiments of this application.

[0231] Example 1

[0232] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0233] like Figure 1 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0234] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is convex. The seventh lens L7 has negative optical power, its object-side surface S12 is convex, and its image-side surface S13 is concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0235] In this example, the total effective focal length F of the optical lens is 5.110mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 33.100mm.

[0236] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0237] Surf Radius Thickness Nd Vd 1 6.860 1.341 1.81 41.00 2 3.328 2.760 3 -6.879 6.200 1.80 46.60 4 -8.943 -0.500 STO infinity 0.600 5 -26.800 3.063 1.69 31.10 6 -9.468 0.659 7 27.268 3.933 1.44 95.10 8 -9.484 1.392 9 20.003 1.100 1.92 20.90 10 6.163 5.482 1.50 81.60 11 -9.392 0.132 12 49.908 3.944 1.69 31.10 13 16.517 0.157 14 infinity 0.550 1.52 64.20 15 infinity 1.660 16 infinity 0.500 1.52 64.20 17 infinity 0.126 IMA infinity

[0238] Table 1

[0239] In Example 1, the object-side surface and image-side surface of any one of the lenses from the first lens L1 to the seventh lens L7 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0240]

[0241] 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; conic; 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, S2, S5, S6, S12, and S13 in Example 1.

[0242] Higher order terms / 4 6 8 Surf K A B C 1 -8.318E-01 -2.838E-03 -6.052E-06 7.245E-06 2 -1.104E+00 -2.957E-03 3.823E-05 -1.125E-05 5 6.986E+00 -1.230E-03 -1.721E-05 -6.170E-07 6 1.283E+00 -2.974E-04 3.245E-07 -1.458E-07 12 9.910E+01 -1.052E-03 2.019E-05 -5.151E-06 13 8.766E+00 -1.984E-03 -8.352E-07 -4.043E-06 Higher order terms 10 12 14 16 Surf D E F G 1 -3.893E-07 6.781E-09 1.038E-10 -3.813E-12 2 6.165E-06 -9.305E-07 6.173E-08 -1.558E-09 5 -4.099E-09 -9.120E-11 -1.316E-11 2.341E-13 6 5.969E-09 -8.456E-11 -8.918E-13 1.303E-13 12 5.520E-07 -3.433E-08 1.135E-09 -1.555E-11 13 4.086E-07 -2.096E-08 6.031E-10 -7.971E-12

[0243] Table 2

[0244] Example 2

[0245] like Figure 2 The image shows an optical lens of Example 2 of this application. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples. Figure 2 A schematic diagram of the optical lens structure of Example 2 is shown.

[0246] like Figure 2 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0247] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is concave, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is convex. The seventh lens L7 has negative optical power, its object-side surface S12 is convex, and its image-side surface S13 is concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0248] In this example, the total effective focal length F of the optical lens is 5.100mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 33.000mm.

[0249] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0250] Surf Radius Thickness Nd Vd 1 6.458 1.179 1.85 40.10 2 3.271 2.234 3 -8.861 6.507 1.91 35.30 4 -10.341 0.000 STO infinity 2.112 5 -164.370 2.900 1.74 49.30 6 -11.987 0.387 7 19.701 5.200 1.62 63.40 8 -18.687 0.166 9 19.578 1.100 1.92 20.90 10 6.163 5.600 1.50 81.60 11 -9.105 0.164 12 35.140 2.412 1.69 31.10 13 10.513 0.205 14 infinity 0.550 1.52 64.20 15 infinity 1.660 16 infinity 0.500 1.52 64.20 17 infinity 0.125 IMA infinity

[0251] Table 3

[0252] Table 4 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S5, S6, S12, and S13 in Example 2.

[0253] Higher order terms / 4 6 8 Surf K A B C 1 -9.419E-01 -2.988E-03 -5.899E-06 7.201E-06 2 -1.096E+00 -2.619E-03 4.376E-05 -1.080E-05 5 9.900E+01 -6.481E-04 -6.553E-06 -1.604E-07 6 2.820E+00 -1.595E-04 2.456E-06 -2.500E-07 12 4.658E+01 -2.125E-03 2.218E-05 -5.157E-06 13 2.804E+00 -3.187E-03 7.414E-07 -3.256E-06 Higher order terms 10 12 14 16 Surf D E F G 1 -3.894E-07 6.781E-09 1.039E-10 -3.815E-12 2 6.222E-06 -9.306E-07 6.174E-08 -1.555E-09 5 3.401E-09 -8.963E-11 -1.289E-11 2.719E-13 6 1.449E-08 -3.065E-10 -1.017E-12 1.224E-13 12 5.611E-07 -3.434E-08 1.135E-09 -1.558E-11 13 3.921E-07 -2.096E-08 6.028E-10 -7.989E-12

[0254] Table 4

[0255] Example 3

[0256] like Figure 3 As shown, an optical lens of Example 3 of this application is described. Figure 3 A schematic diagram of the optical lens structure of Example 3 is shown.

[0257] like Figure 3 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0258] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is convex. The seventh lens L7 has negative optical power, its object-side surface S12 is concave, and its image-side surface S13 is concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0259] In this example, the total effective focal length F of the optical lens is 5.064mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 29.825mm.

[0260] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0261] Surf Radius Thickness Nd Vd 1 8.572 1.300 1.85 40.10 2 3.495 3.300 3 -5.403 2.900 1.85 40.10 4 -11.597 0.117 5 15.180 3.700 1.85 40.10 6 -14.730 2.545 STO infinity 0.000 7 12.243 3.550 1.50 81.60 8 -20.966 0.498 9 14.071 1.000 1.92 20.90 10 5.440 4.150 1.59 68.50 11 -9.799 1.141 12 -25.168 2.150 1.85 40.10 13 57.527 1.000 14 infinity 0.550 1.52 64.20 15 infinity 1.323 16 infinity 0.500 1.52 64.20 17 infinity 0.100 IMA infinity

[0262] Table 5

[0263] Table 6 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used on the aspherical lens surfaces S1, S2, S3, S4, S5, S6, S12, and S13 in Example 3.

[0264] Higher order terms / 4 6 8 Surf K A B C 1 -4.751E+00 -2.497E-03 4.584E-05 1.186E-06 2 -3.689E-01 -5.157E-03 2.744E-05 2.107E-06 3 -9.616E-01 1.304E-03 -1.396E-04 2.387E-06 4 -3.263E+00 2.042E-04 -3.386E-05 6.601E-07 5 0.000E+00 -4.530E-04 1.438E-05 3.351E-07 6 0.000E+00 7.203E-05 1.340E-05 -5.534E-08 12 3.530E+01 0.000E+00 0.000E+00 0.000E+00 13 9.573E+01 0.000E+00 0.000E+00 0.000E+00 Higher order terms 10 12 14 16 Surf D E F G 1 -4.980E-08 2.897E-10 1.107E-11 -1.695E-13 2 -4.513E-07 2.368E-08 -2.157E-10 -1.636E-11 3 3.463E-07 -4.851E-08 4.318E-09 -1.602E-10 4 1.169E-07 -3.690E-09 -3.317E-11 3.361E-14 5 3.415E-08 -1.226E-10 -9.421E-11 2.085E-12 6 -2.076E-08 3.347E-09 -9.160E-11 7.365E-13 12 0.000E+00 0.000E+00 0.000E+00 0.000E+00 13 0.000E+00 0.000E+00 0.000E+00 0.000E+00

[0265] Table 6

[0266] Example 4

[0267] like Figure 4 As shown, the optical lens of Example 4 of this application is described. Figure 4 A schematic diagram of the optical lens structure of Example 4 is shown.

[0268] like Figure 4 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0269] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens L5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave. The sixth lens L6 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is convex. The seventh lens L7 has negative optical power, its object-side surface S12 is concave, and its image-side surface S13 is concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0270] In this example, the total effective focal length F of the optical lens is 5.250mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 30.736mm.

[0271] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0272] Surf Radius Thickness Nd Vd 1 8.069 1.179 1.85 40.10 2 3.235 2.234 3 -7.979 6.507 1.91 35.30 4 -15.385 0.000 5 15.154 2.112 1.74 49.30 6 -14.550 2.900 STO infinity 0.387 7 19.187 5.200 1.62 63.40 8 -12.582 0.166 9 10.848 1.100 1.92 20.90 10 5.500 5.600 1.50 81.60 11 -9.021 0.164 12 -20.482 2.412 1.69 31.10 13 18.725 0.205 14 infinity 0.550 1.52 64.20 15 infinity 1.660 16 infinity 0.500 1.52 64.20 17 infinity 0.125 IMA infinity

[0273] Table 7

[0274] Table 8 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S3, S4, S5, S6, S12, and S13 in Example 4.

[0275]

[0276]

[0277] Table 8

[0278] Example 5

[0279] like Figure 5 As shown, an optical lens of Example 5 of this application is described. Figure 5 A schematic diagram of the optical lens structure of Example 5 is shown.

[0280] like Figure 5As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0281] The first lens L1 has negative optical power, with its object-side surface S1 and image-side surface S2 both being concave. The second lens L2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens L3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens L6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The seventh lens L7 has positive optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0282] In this example, the total effective focal length F of the optical lens is 5.109mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 34.120mm.

[0283] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0284]

[0285]

[0286] Table 9

[0287] Table 10 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S3, S4, S12, and S13 in Example 5.

[0288] Higher order terms / 4 6 8 Surf K A B C 1 -8.833E+01 -1.544E-03 1.938E-04 -1.203E-05 2 -1.001E+00 -2.722E-04 5.570E-05 3.183E-05 3 -1.493E+01 -5.413E-03 3.809E-04 -3.365E-05 4 -5.417E-01 2.394E-04 1.026E-05 2.311E-07 12 5.157E+01 -4.834E-04 -4.819E-06 -2.596E-07 13 2.504E+01 -1.525E-03 -4.553E-05 7.558E-07 Higher order terms 10 12 14 16 Surf D E F G 1 4.102E-07 -5.537E-09 -3.765E-11 1.090E-12 2 -4.756E-06 2.508E-07 4.217E-09 -5.255E-10 3 1.893E-06 -5.701E-08 3.110E-09 -2.586E-10 4 7.741E-09 -1.944E-10 6.434E-14 -2.867E-13 12 -7.991E-09 3.822E-10 4.445E-13 -5.664E-13 13 4.238E-08 -1.344E-09 1.271E-12 1.116E-13

[0289] Table 10

[0290] Example 6

[0291] like Figure 6As shown, an optical lens of Example Six of this application is described. Figure 6 A schematic diagram of the optical lens structure of Example Six is ​​shown.

[0292] like Figure 6 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0293] The first lens L1 has negative optical power, with both its object-side surface S1 and image-side surface S2 being concave. The second lens L2 has positive optical power, with both its object-side surface S3 and image-side surface S4 being convex. The third lens L3 has positive optical power, with both its object-side surface S5 and image-side surface S6 being convex. The fourth lens L4 has positive optical power, with both its object-side surface S7 and image-side surface S8 being convex. The fifth lens L5 has negative optical power, with both its object-side surface S9 and image-side surface S10 being concave. The sixth lens L6 has positive optical power, with both its object-side surface S10 and image-side surface S11 being convex. The seventh lens L7 has negative optical power, with both its object-side surface S12 and image-side surface S13 being concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0294] In this example, the total effective focal length F of the optical lens is 5.104mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 33.645mm.

[0295] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0296] Surf Radius Thickness Nd Vd 1 -38.451 0.865 1.59 61.20 2 5.459 2.600 3 -8.124 5.923 1.69 31.10 4 -10.275 0.000 STO infinity 0.100 5 94.387 3.596 1.59 67.30 6 -8.310 0.064 7 115.269 5.420 1.50 81.60 8 -13.321 1.807 9 35.216 1.251 1.85 23.80 10 6.163 5.117 1.59 68.70 11 -13.950 0.100 12 39.456 3.794 1.59 61.20 13 21.264 0.100 14 infinity 0.550 1.52 64.20 15 infinity 1.660 16 infinity 0.400 1.52 64.20 17 infinity 0.297 IMA infinity

[0297] Table 11

[0298] Table 12 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S3, S4, S12, and S13 in Example 6.

[0299]

[0300]

[0301] Table 12

[0302] Example 7

[0303] like Figure 7 As shown, an optical lens of Example Seven of this application is described. Figure 7 A schematic diagram of the optical lens structure of Example 7 is shown.

[0304] like Figure 7 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0305] The first lens L1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens L2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens L6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The seventh lens L7 has negative optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0306] In this example, the total effective focal length F of the optical lens is 5.113mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 33.629mm.

[0307] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0308]

[0309]

[0310] Table 13

[0311] Table 14 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S5, S6, S12, and S13 in Example 7.

[0312] Higher order terms / 4 6 8 Surf K A B C 1 -9.579E+01 -2.131E-03 2.320E-04 -1.313E-05 2 -1.267E+00 -1.428E-03 1.037E-04 3.092E-05 5 1.109E-01 -1.374E-04 4.005E-06 -1.046E-07 6 1.374E-04 3.859E-04 5.494E-06 -8.407E-08 12 -9.900E+01 -8.043E-04 -2.810E-05 1.441E-06 13 9.935E+00 -1.845E-03 -8.206E-05 2.899E-06 Higher order terms 10 12 14 16 Surf D E A B 1 4.238E-07 -5.495E-09 -3.732E-11 1.024E-12 2 -4.894E-06 2.496E-07 4.223E-09 -5.007E-10 5 -2.622E-09 1.814E-11 9.886E-14 -2.453E-13 6 1.195E-09 -4.075E-11 -1.439E-13 -4.536E-14 12 -9.453E-08 2.214E-09 -3.239E-13 -5.672E-13 13 -1.851E-09 -1.015E-09 -1.876E-12 1.762E-13

[0313] Table 14

[0314] Example 8

[0315] like Figure 8 As shown, an optical lens of Example 8 of this application is described. Figure 8 A schematic diagram of the optical lens structure of Example 8 is shown.

[0316] like Figure 8 As shown, the optical lens includes, in order from the object side to the image side: first lens L1, second lens L2, aperture stop STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, object side surface of protective glass S16, image side surface of protective glass S17, and imaging surface IMA.

[0317] The first lens L1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens L2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens L3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens L4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens L5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens L6 has positive optical power, with its object-side surface S10 being convex and its image-side surface S11 being convex. The seventh lens L7 has negative optical power, with its object-side surface S12 being convex and its image-side surface S13 being concave. Light from the object passes through each surface S1 to S17 in sequence and is finally imaged on the imaging surface IMA.

[0318] In this example, the total effective focal length F of the optical lens is 5.110mm, the maximum field of view (FOV) of the optical lens is 120.000°, and the total length (TTL) of the optical lens is 33.507mm.

[0319] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0320] Surf Radius Thickness Nd Vd 1 -50.968 0.762 1.59 61.20 2 5.276 2.574 3 -5.984 3.264 1.88 39.20 4 -10.261 -0.300 STO infinity 0.400 5 44.362 4.592 1.69 53.20 6 -12.753 1.000 7 26.262 4.895 1.44 95.10 8 -10.241 3.117 9 11.474 1.000 1.92 20.90 10 6.163 5.500 1.50 81.60 11 -11.717 0.500 12 31.171 3.126 1.59 61.20 13 16.095 0.117 14 infinity 0.550 1.52 64.20 15 infinity 1.660 16 infinity 0.400 1.52 64.20 17 infinity 0.350 IMA infinity

[0321] Table 15

[0322] Table 16 below gives the conic coefficient k and the coefficients A, B, C, D, E, F, G of each higher-order term that can be used for the aspherical lens surfaces S1, S2, S5, S6, S12, and S13 in Example 8.

[0323]

[0324]

[0325] Table 16 summarizes that Examples 1 to 8 satisfy the relationships shown in Table 17.

[0326]

[0327]

[0328] Table 17

[0329] Table 18 gives the effective focal length F of the optical lenses in Examples 1 to 8, and the effective focal lengths of each lens from F1 to F6, etc. (unit: mm).

[0330]

[0331]

[0332] Table 18

[0333] 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.

[0334] 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.

[0335] 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.

[0336] 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, The optical lens has seven lenses with optical power, which are arranged sequentially along the optical axis from the object side to the image side as follows: The first lens has negative optical power and the image-side surface of the first lens is concave. The second lens has optical power, the object side of the second lens is concave, and the image side of the second lens is convex. The third lens has positive optical power and its image-side surface is convex. The fourth lens has positive optical power and its image-side surface is convex. The fifth lens has negative optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave. The sixth lens has positive optical power, the object side of the sixth lens is convex, and the image side of the sixth lens is convex. The seventh lens has optical power and the image-side surface of the seventh lens is concave. Wherein, the second lens has positive optical power and the seventh lens has negative optical power, or both the second lens and the seventh lens have negative optical power, or both the second lens and the seventh lens have positive optical power; The maximum field of view (FOV) of the optical lens in radians θ, the total focal length (F) of the optical lens, and the maximum aperture (D) of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.

8. The refractive index temperature coefficient of the sixth lens, i.e., the change in the material refractive index of the sixth lens with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following: -3E+06≤F6 / (dn / dt(6))≤-2E+05.

2. The optical lens according to claim 1, characterized in that, The object-side surface of the first lens is convex.

3. The optical lens according to claim 1, characterized in that, The object-side surface of the first lens is concave.

4. The optical lens according to claim 1, characterized in that, The object-side surface of the third lens is concave.

5. The optical lens according to claim 1, characterized in that, The object-side surface of the third lens is convex.

6. The optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is concave.

7. The optical lens according to claim 1, characterized in that, The object-side surface of the fourth lens is convex.

8. The optical lens according to claim 1, characterized in that, The seventh lens has negative optical power, and the object side of the seventh lens is convex.

9. The optical lens according to claim 1, characterized in that, The seventh lens has negative optical power, and the object side of the seventh lens is concave.

10. The optical lens according to claim 1, characterized in that, The seventh lens has positive optical power, and the object side of the seventh lens is convex.

11. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is disposed between the second lens and the third lens, or between the third lens and the fourth lens.

12. The optical lens according to claim 1, characterized in that, The first lens is an aspherical lens and / or the seventh lens is an aspherical lens.

13. The optical lens according to claim 1, characterized in that, The seventh lens is a recurve lens.

14. The optical lens according to claim 1, characterized in that, The fifth lens and the sixth lens are cemented together to form a cemented lens.

15. The optical lens according to any one of claims 1 to 14, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: TTL / H / FOV≤0.

04.

16. The optical lens according to any one of claims 1 to 14, characterized in that, The maximum aperture D of the object 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 FOV of the optical lens satisfy the following condition: 0.3≤D / H / θ≤0.

8.

17. The optical lens according to any one of claims 1 to 14, characterized in that, The combined focal length F34 of the third lens and the fourth lens and the total focal length F of the optical lens satisfy the following condition: 1≤F34 / F≤4.

18. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -3≤F1 / F≤-0.

5.

19. The optical lens according to any one of claims 1 to 14, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view (FOV) of the optical lens satisfy the following: 5≤TTL / θ / 2≤10.

20. The optical lens according to any one of claims 1 to 14, 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: 72 ≤ (FOV × F) / H ≤ 85.

21. The optical lens according to any one of claims 1 to 14, characterized in that, 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 FOV of the optical lens satisfy the following condition: 0.1≤|(HF*θ) / (F*θ)|≤0.

4.

22. The optical lens according to any one of claims 1 to 14, characterized in that, 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 FOV of the optical lens satisfy the following condition: 0.3≤(H / 2) / (F*tan(θ / 2))≤0.

6.

23. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 85.351 ≥ |F2 / F| ≥ 1.

24. The optical lens according to any one of claims 1 to 14, characterized in that, The F-number FNO of the optical lens satisfies: 1.459 ≤ FNO ≤ 1.

7.

25. The optical lens according to any one of claims 1 to 14, characterized in that, The angle subtended by the first lens of the optical lens at the maximum field of view on the image side, arctan(1 / K(S2)), satisfies: 20≤arctan(1 / K(S2))≤60, where K is the edge slope of the lens at the maximum field of view on the image side of the first lens, and S2 is the image side surface of the first lens.

26. The optical lens according to any one of claims 1 to 14, characterized in that, The central radius of curvature R3 of the object side of the second lens and the central radius of curvature R4 of the image side of the second lens satisfy the following condition: 0.3≤R3 / R4≤2.

27. The optical lens according to any one of claims 1 to 14, characterized in that, The center thickness T2 of the object side of the second lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.097≤T2 / TTL≤0.

212.

28. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.3 ≤ F3 / F4 ≤ 2.

29. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R5 of the object side of the third lens and the radius of curvature R6 of the image side of the third lens satisfy the following condition: 0 ≤ |R5 / R6| ≤ 19.

30. The optical lens according to any one of claims 1 to 14, characterized in that, The object-side center thickness T3 of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy the following condition: T3 / TTL≤0.

3.

31. The optical lens according to any one of claims 1 to 14, characterized in that, The central radius of curvature R7 of the object side of the fourth lens and the central radius of curvature R8 of the image side of the fourth lens satisfy the following condition: 0.1≤|R7 / R8|≤10.

32. The optical lens according to any one of claims 1 to 14, characterized in that, The object-side center thickness T4 of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.119≤T4 / TTL≤0.

4.

33. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: -3.071≤F5 / F≤0.

34. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the following condition: -4≤F5 / F6≤-0.

5.

35. The optical lens according to any one of claims 1 to 14, characterized in that, The subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -38≤arctan(1 / K(S14))≤-0.

4.

36. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R14 of the object side of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3.901≤|R14 / F|≤12.

083.

37. The optical lens according to any one of claims 1 to 14, characterized in that, The distance T(10-14) from the center of the object side of the fifth lens to the center of the object side of the seventh lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.1≤T(10-14) / TTL≤0.

6.

38. The optical lens according to any one of claims 1 to 14, characterized in that, The temperature coefficient of refractive index of the fourth lens, i.e. the change of the material refractive index of the fourth lens with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following: -3E+06≤F4 / (dn / dt(4))≤-6E+05.

39. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: 3.85 ≥ F3 / F ≥ 0.

40. An optical lens, characterized in that, The optical lens has seven lenses with optical power, which are arranged sequentially along the optical axis from the object side to the image side as follows: The first lens has negative optical power and the image-side surface of the first lens is concave. The second lens has optical power, the object side of the second lens is concave, and the image side of the second lens is convex. The third lens has positive optical power and its image-side surface is convex. The fourth lens has positive optical power and its image-side surface is convex. The fifth lens has negative optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave. The sixth lens has positive optical power, the object side of the sixth lens is convex, and the image side of the sixth lens is convex. The seventh lens has optical power and the image-side surface of the seventh lens is concave. Wherein, the second lens has positive optical power and the seventh lens has negative optical power, or both the second lens and the seventh lens have negative optical power, or both the second lens and the seventh lens have positive optical power; The maximum field of view (FOV) of the optical lens in radians θ, the total focal length (F) of the optical lens, and the maximum aperture (D) of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ (θ*F) / D ≤ 1.

8. The maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: D / H / FOV≤0.03; The refractive index temperature coefficient of the sixth lens, i.e., the change in the material refractive index of the sixth lens with temperature, dn / dt(6), and the focal length F6 of the sixth lens satisfy the following: -2E+06≤F6 / (dn / dt(6))≤-3E+05.

41. The optical lens according to claim 40, characterized in that, The object-side surface of the first lens is convex.

42. The optical lens according to claim 40, characterized in that, The object-side surface of the first lens is concave.

43. The optical lens according to claim 40, characterized in that, The object-side surface of the third lens is concave.

44. The optical lens according to claim 40, characterized in that, The object-side surface of the third lens is convex.

45. The optical lens according to claim 40, characterized in that, The object-side surface of the fourth lens is concave.

46. ​​The optical lens according to claim 40, characterized in that, The object-side surface of the fourth lens is convex.

47. The optical lens according to claim 40, characterized in that, The object-side surface of the seventh lens is convex.

48. The optical lens according to claim 40, characterized in that, The object-side surface of the seventh lens is concave.

49. The optical lens according to claim 40, characterized in that, The optical lens also includes an aperture stop, which is disposed between the second lens and the third lens, or between the third lens and the fourth lens.

50. The optical lens according to claim 40, characterized in that, The first lens is an aspherical lens and / or the seventh lens is an aspherical lens.

51. The optical lens according to claim 40, characterized in that, The seventh lens is a recurve lens.

52. The optical lens according to claim 40, characterized in that, The fifth lens and the sixth lens are cemented together to form a cemented lens.

53. The optical lens according to any one of claims 40 to 52, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.031≤TTL / H / FOV≤0.

038.

54. The optical lens according to any one of claims 40 to 52, characterized in that, The maximum aperture D of the object 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 FOV of the optical lens satisfy the following condition: 0.4≤D / H / θ≤0.

7.

55. The optical lens according to any one of claims 40 to 52, characterized in that, The combined focal length F34 of the third lens and the fourth lens and the total focal length F of the optical lens satisfy the following condition: 1.2≤F34 / F≤3.

56. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F1 of the first lens and the total focal length F of the optical lens satisfy the following condition: -2≤F1 / F≤-1.

57. The optical lens according to any one of claims 40 to 52, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the radian value θ of the maximum field of view (FOV) of the optical lens satisfy the following: 6≤TTL / θ / 2≤9.

58. The optical lens according to any one of claims 40 to 52, 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: 73 ≤ (FOV × F) / H ≤ 80.

59. The optical lens according to any one of claims 40 to 52, characterized in that, 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 FOV of the optical lens satisfy the following condition: 0.2≤|(HF*θ) / (F*θ)|≤0.

3.

60. The optical lens according to any one of claims 40 to 52, characterized in that, 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 FOV of the optical lens satisfy the following condition: 0.4≤(H / 2) / (F*tan(θ / 2))≤0.

55.

61. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 85.351 ≥ |F2 / F| ≥ 2.

62. The optical lens according to any one of claims 40 to 52, characterized in that, The F-number FNO of the optical lens satisfies: 1.459 ≤ FNO ≤ 1.

6.

63. The optical lens according to any one of claims 40 to 52, characterized in that, The angle subtended by the first lens of the optical lens at the maximum field of view on the image side, arctan(1 / K(S2)), satisfies: 25≤arctan(1 / K(S2))≤55, where K is the edge slope of the lens at the maximum field of view on the image side of the first lens, and S2 is the image side surface of the first lens.

64. The optical lens according to any one of claims 40 to 52, characterized in that, The central radius of curvature R3 of the object side of the second lens and the central radius of curvature R4 of the image side of the second lens satisfy the following condition: 0.35≤R3 / R4≤1.

5.

65. The optical lens according to any one of claims 40 to 52, characterized in that, The center thickness T2 of the object side of the second lens and the total optical length of the optical lens, i.e. the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.097≤T2 / TTL≤0.

212.

66. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.4 ≤ F3 / F4 ≤ 1.

5.

67. The optical lens according to any one of claims 40 to 52, characterized in that, The radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens satisfy the following condition: 0.2≤|R5 / R6|≤16.

68. The optical lens according to any one of claims 40 to 52, characterized in that, The thickness T3 of the object side center of the third lens and the total optical length of the optical lens, i.e., the distance TTL from the object side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.069≤T3 / TTL≤0.

15.

69. The optical lens according to any one of claims 40 to 52, characterized in that, The central radius of curvature R7 of the object side of the fourth lens and the central radius of curvature R8 of the image side of the fourth lens satisfy the following condition: 0.3≤|R7 / R8|≤9.

70. The optical lens according to any one of claims 40 to 52, characterized in that, The object-side center thickness T4 of the fourth lens and the total optical length of the optical lens, i.e., the distance TTL from the object-side center of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.119≤T4 / TTL≤0.

2.

71. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: -3.071≤F5 / F≤-0.

5.

72. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy the following condition: -2.5 ≤ F5 / F6 ≤ -1.

73. The optical lens according to any one of claims 40 to 52, characterized in that, The subtended angle arctan(1 / K(S14)) at the maximum field of view of the object side of the seventh lens satisfies: -38≤arctan(1 / K(S14))≤-0.

4.

74. The optical lens according to any one of claims 40 to 52, characterized in that, The radius of curvature R14 of the object side of the seventh lens and the total focal length F of the optical lens satisfy the following condition: 3.901≤|R14 / F|≤12.

083.

75. The optical lens according to any one of claims 40 to 52, characterized in that, The distance T(10-14) from the center of the object side of the fifth lens to the center of the object side of the seventh lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.2≤T(10-14) / TTL≤0.

4.

76. The optical lens according to any one of claims 40 to 52, characterized in that, The temperature coefficient of refractive index of the fourth lens, i.e. the change of the material refractive index of the fourth lens with temperature, dn / dt(4), and the focal length F4 of the fourth lens satisfy the following: -2E+06≤F4 / (dn / dt(4))≤-7E+05.

77. The optical lens according to any one of claims 40 to 52, characterized in that, The focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: 3.85 ≥ F3 / F ≥ 1.

78. An electronic device, characterized in that, It includes an optical lens as described in any one of claims 1 to 77 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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