Optical lens and electronic device with same

Abstract

This invention provides an optical lens and an electronic device having the same. The optical lens includes: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having a first side surface being concave, and a second side surface of the second lens being convex; a third lens having positive optical power, a first side surface of the third lens being convex, and a second side surface of the third lens being convex; a fourth lens having positive optical power, and a second side surface of the fourth lens being convex; a fifth lens having optical power; a sixth lens having the same surface shape for its first side surface and its second side surface; and a seventh lens having optical power, and a second side surface of the seventh lens being convex. This invention solves at least one of the problems in existing optical lenses, including the inability to simultaneously achieve miniaturization and high resolution, pixel differences, poor image quality in low-light environments, and the inability to match the center angular resolution with higher pixel chips while satisfying a large field of view.

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] With technological advancements, the application of optical lenses in various applications is gradually increasing, and users' performance requirements for optical lenses are also rising. As users demand higher quality, optical lenses are gradually moving towards miniaturization. However, size limitations lead to problems such as poor resolution, small aperture, and poor image quality in low-light environments. Furthermore, to acquire more information, optical lenses need to image objects within a wide field of view while also maintaining telephoto capabilities, requiring a high angular magnification in the central imaging area. With the rapid development of machine vision-based autonomous driving technology, automakers have increasingly higher requirements for the image quality of visual images. Automotive CIS (COMS Image Sensor) chip manufacturers have launched higher-resolution pixel sensors, creating a market demand for miniaturized, stable, and reliable automotive front-view lenses that can be adapted to high-pixel chips.

[0003] Automotive lenses need to capture images with a wide field of view. To meet the requirements of specific usage scenarios, they also need to accommodate telephoto lenses, requiring a high angular magnification in the center imaging area. To ensure image clarity, automotive lenses require high resolution. Currently, high-pixel automotive front-view lenses are mainly 8-megapixel resolution, which is incompatible with higher-pixel chips, such as 17-megapixel sensors. As users' aesthetic demands increase, exterior lenses are typically installed in concealed locations and their size is reduced to integrate seamlessly with the vehicle. Therefore, automotive lenses are increasingly miniaturized, leading to insufficient resolution. Furthermore, the small aperture of small optical lenses often results in insufficient illumination on the sensor surface in low-light environments, making them susceptible to noise. To adapt to low-light driving environments such as rainy days and nighttime, automotive lenses require a large amount of light intake to ensure image quality. Due to overall size limitations, automotive lenses often have very small apertures, resulting in insufficient illumination on the sensor surface in low-light environments and susceptibility to noise.

[0004] In other words, existing optical lenses suffer from problems such as the inability to simultaneously achieve miniaturization and high resolution, poor pixel density, poor image quality in low-light environments, and the inability to match the central angular resolution with higher pixel chips while satisfying a wide field of view. 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 at least one of the following problems in the prior art: the inability to simultaneously achieve miniaturization and high resolution, poor pixel quality, poor imaging quality in dark environments, and the inability to match the central angular resolution with higher pixel chips while satisfying a large field of view.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having optical power, a first side surface of the second lens being concave, and a second side surface of the second lens being convex; a third lens having positive optical power, a first side surface of the third lens being convex, and a second side surface of the third lens being convex; a fourth lens having positive optical power, a second side surface of the fourth lens being convex; a fifth lens having optical power; a sixth lens having optical power, the first side surface of the sixth lens and the second side surface of the sixth lens having the same surface shape; and a seventh lens having optical power, the second side surface of the seventh lens being convex.

[0007] Furthermore, the second lens has positive optical power.

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

[0009] Furthermore, the first side surface of the fourth lens is concave.

[0010] Furthermore, the first side surface of the fourth lens is convex.

[0011] Furthermore, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, as is the second side surface of the fifth lens.

[0012] Furthermore, the fifth lens has negative optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

[0013] Furthermore, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, as is the second side surface of the fifth lens.

[0014] Furthermore, the sixth lens has positive optical power, and the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0015] Furthermore, the sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is also concave.

[0016] Furthermore, the seventh lens has positive optical power, and the first side surface of the seventh lens is convex.

[0017] Furthermore, the seventh lens has negative optical power, and the first side surface of the seventh lens is concave.

[0018] Furthermore, the first lens, the second lens, the third lens, and the seventh lens are all aspherical lenses.

[0019] Furthermore, the fifth and sixth lenses are cemented lenses.

[0020] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens.

[0021] Furthermore, the first side surface of the seventh lens has a recurve point, and the second side surface of the seventh lens also has a recurve point.

[0022] Furthermore, the first side surface of the first lens has a recurved point.

[0023] Furthermore, the first side surface of the first lens has a recurve point, the first side surface of the seventh lens has a recurve point, and the second side surface of the seventh lens has a recurve point.

[0024] Furthermore, the first side surface of the first lens has a recurved point.

[0025] Furthermore, the total length TTL of the optical lens and the focal length F of the optical lens satisfy the following relationship: TTL / F≤6.

[0026] Furthermore, the entrance pupil diameter ENPD of the optical lens and the focal length F of the optical lens satisfy the following condition: F / ENPD≤2.2.

[0027] Furthermore, the total length TTL of the optical lens and the maximum aperture DMAX of all lenses in the optical lens satisfy the following condition: TTL / DMAX≤5.

[0028] Furthermore, the total length TTL 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≤0.06.

[0029] Furthermore, the focal length F 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: (FOV×F) / H≥80.

[0030] Furthermore, the maximum aperture DMAX among all lenses in 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: DMAX / H / FOV≤0.2.

[0031] Furthermore, the maximum field of view radian θ of the optical lens, the 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: (H / 2) / (F) tan(θ / 2))≥0.1.

[0032] Furthermore, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.3≤F / H≤2.

[0033] Furthermore, the subtended angle arctan(1 / K(S1)) under the maximum field of view of the first side of the first lens satisfies: arctan(1 / K(S1))≤12.

[0034] Furthermore, the sag SAG1 of the first side surface of the first lens at the maximum field of view and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG1 / D1)≤0.6.

[0035] Furthermore, the sag SAG2 of the second side surface of the first lens at the maximum field of view and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG2 / D2)≥0.05.

[0036] Furthermore, the sag SAG11 of the second side of the fifth lens at the maximum field of view and the maximum aperture D11 of the second side of the fifth lens corresponding to the maximum field of view satisfy the following: |arctan(SAG11 / D11)|≥0.08.

[0037] Furthermore, the radius of curvature R14 of the second side of the seventh lens satisfies the following relationship with the focal length F of the optical lens: R14 / F≤-0.001.

[0038] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: F3 / F4≤5.

[0039] Furthermore, the total length TTL of the optical lens and the center distance d67 between the sixth and seventh lenses satisfy the following condition: d67 / TTL≥0.03.

[0040] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: R3 / R4≥0.01.

[0041] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: F7 / F6≤-0.001.

[0042] According to another aspect of the present invention, an optical lens is provided, comprising: 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 optical power; a sixth lens having optical power; and a seventh lens having optical power; wherein the radius of curvature R14 of the second side surface of the seventh lens satisfies the following relationship with the focal length F of the optical lens: R14 / F ≤ -0.001.

[0043] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0044] Furthermore, the second lens has positive optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex.

[0045] Furthermore, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex.

[0046] Furthermore, the first side surface of the third lens is convex, and the second side surface of the third lens is also convex.

[0047] Furthermore, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0048] Furthermore, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is also convex.

[0049] Furthermore, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, as is the second side surface of the fifth lens.

[0050] Furthermore, the fifth lens has negative optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

[0051] Furthermore, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave, as is the second side surface of the fifth lens.

[0052] Furthermore, the sixth lens has positive optical power, and the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0053] Furthermore, the sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is also concave.

[0054] Furthermore, the seventh lens has positive optical power, and the first side surface of the seventh lens is convex, as is the second side surface of the seventh lens.

[0055] Furthermore, the seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

[0056] Furthermore, the first lens, the second lens, the third lens, and the seventh lens are all aspherical lenses.

[0057] Furthermore, the fifth and sixth lenses are cemented lenses.

[0058] Furthermore, the optical lens also includes an aperture stop, which is positioned between the second lens and the third lens.

[0059] Furthermore, the first side surface of the seventh lens has a recurve point, and the second side surface of the seventh lens also has a recurve point.

[0060] Furthermore, the first side surface of the first lens has a recurved point.

[0061] Furthermore, the first side surface of the first lens has a recurve point, the first side surface of the seventh lens has a recurve point, and the second side surface of the seventh lens has a recurve point.

[0062] Furthermore, the first side surface of the first lens has a recurved point.

[0063] Furthermore, the total length TTL of the optical lens and the focal length F of the optical lens satisfy the following relationship: TTL / F≤6.

[0064] Furthermore, the entrance pupil diameter ENPD of the optical lens and the focal length F of the optical lens satisfy the following condition: F / ENPD≤2.2.

[0065] Furthermore, the total length TTL of the optical lens and the maximum aperture DMAX of all lenses in the optical lens satisfy the following condition: TTL / DMAX≤5.

[0066] Furthermore, the total length TTL 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≤0.06.

[0067] Furthermore, the focal length F 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: (FOV×F) / H≥80.

[0068] Furthermore, the maximum aperture DMAX among all lenses in 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: DMAX / H / FOV≤0.2.

[0069] Furthermore, the maximum field of view radian θ of the optical lens, the 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: (H / 2) / (F) tan(θ / 2))≥0.1.

[0070] Furthermore, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.3≤F / H≤2.

[0071] Furthermore, the subtended angle arctan(1 / K(S1)) under the maximum field of view of the first side of the first lens satisfies: arctan(1 / K(S1))≤12.

[0072] Furthermore, the sag SAG1 of the first side surface of the first lens at the maximum field of view and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG1 / D1)≤0.6.

[0073] Furthermore, the sag SAG2 of the second side surface of the first lens at the maximum field of view and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG2 / D2)≥0.05.

[0074] Furthermore, the sag SAG11 of the second side of the fifth lens at the maximum field of view and the maximum aperture D11 of the second side of the fifth lens corresponding to the maximum field of view satisfy the following: |arctan(SAG11 / D11)|≥0.08.

[0075] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: F7 / F6≤-0.001.

[0076] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: F3 / F4≤5.

[0077] Furthermore, the total length TTL of the optical lens and the center distance d67 between the sixth and seventh lenses satisfy the following condition: d67 / TTL≥0.03.

[0078] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: R3 / R4≥0.01.

[0079] 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.

[0080] According to the technical solution of this invention, 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. The first lens has negative optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave. The second lens has optical power, a first side surface of the second lens is concave, and a second side surface of the second lens is convex. The third lens has positive optical power, a first side surface of the third lens is convex, and a second side surface of the third lens is convex. The fourth lens has positive optical power, and a second side surface of the fourth lens is convex. The fifth lens has optical power. The sixth lens has optical power, and the first side surface and the second side surface of the sixth lens have the same surface shape. The seventh lens has optical power, and a second side surface of the seventh lens is convex.

[0081] The first lens has negative optical power, a convex first side surface, and a concave second side surface. Setting the first lens to have negative optical power allows for light divergence, and the convex first side surface provides a smaller angle of incidence, facilitating more light entering the optical system and achieving a wide field of view. The concave second side surface controls the trajectory of large-angle rays at the edges, providing a larger light-receiving surface for the rear optical system. The first lens is an aspherical lens, and the radii of curvature of its first and second sides are relatively close, making it approximately a concentric meniscus lens. This results in a longer focal length, meeting the requirements for telephoto lenses. Simultaneously, the convex center of the first lens and the small angle at the edges help collect edge field rays and compress the height of these rays at the image plane, contributing to a large central angular resolution and the resolution of more details. Furthermore, the use of a high-refractive-index material in the first lens allows for a smaller front aperture and improved image quality.

[0082] The second lens has positive optical power. Its first side surface is concave, and its second side surface is convex. This positive optical power allows it to converge light rays. The second lens has a meniscus shape, concave towards the first side, which further converges light rays entering through the first lens. Combined with the third lens, this effectively reduces the projection height of light onto the lens, facilitating a reduction in the overall aperture of the optical lens, enabling miniaturization and cost reduction. Furthermore, because the curvature of the first and second sides of the second lens is similar, it facilitates a smooth transition of light across the second lens, reducing field curvature and sensitivity, and improving image quality.

[0083] The second lens has negative optical power. Its first side is concave, and its second side is convex. This negative optical power diverges light. The second lens is meniscus-shaped, concave towards the first side, further diverging light rays passing through the first lens. Combined with the third lens, this effectively reduces the projection height of light onto the lens, facilitating a reduction in the overall aperture of the optical lens, enabling miniaturization and cost reduction. Furthermore, because the curvature of the first and second sides of the second lens is similar, it facilitates a smooth transition of light across the second lens, reducing field curvature and sensitivity, and improving image quality.

[0084] The third lens has positive optical power, and both its first and second sides are convex. This positive optical power allows light rays to converge, enabling diverging light to enter the rear optical system smoothly. It also lowers the angle of light entering the rear optical system, reducing the rear aperture and facilitating lens miniaturization. Furthermore, the convex second side of the third lens further reduces the rear aperture, contributing to miniaturization.

[0085] The fourth lens has positive optical power. Its first side surface is concave, and its second side surface is convex. This positive optical power lens further converges the light rays, ensuring a smooth transition to the rear optical system and improving the image quality of the lens. It also further reduces the light beam's trajectory, which is beneficial for miniaturizing the rear optical system and further reducing the front aperture.

[0086] The fourth lens has positive optical power. Both its first and second sides are convex. This positive optical power further converges the light, allowing it to smoothly transition into the rear optical system, thus improving the image quality of the lens. Simultaneously, the convergence of light by the fourth lens allows for a larger aperture, enabling more light to enter and increasing the brightness of the image.

[0087] The fifth lens has positive optical power. Both its first and second sides are convex. This positive optical power lens converges light rays. When used in conjunction with the third and fourth lenses, which also have positive optical power, it further reduces the incident height of light, decreasing the aperture of the rear optical system and achieving miniaturization.

[0088] The fifth lens has negative optical power. Its first side is convex, and its second side is concave. In front of the fifth lens are two consecutive lenses with positive optical power, both of which converge light rays. While continuously altering the direction of light, they also introduce significant aberrations. The fifth lens with negative optical power diverges light rays. By controlling the focal length of the fifth lens, various aberrations introduced by the front positive lens can be effectively corrected, thus improving the image quality of the optical lens.

[0089] The fifth lens has negative optical power, and both its first and second sides are concave. In front of the fifth lens are two consecutive lenses with positive optical power, both of which converge light rays. While continuously altering the direction of light, they also introduce significant aberrations. The fifth lens, with its negative optical power, diverges light rays. By controlling the shape and focal length of the fifth lens, various aberrations introduced by the front positive lenses can be effectively corrected, improving the image quality of the optical lens and simultaneously adjusting the effective aperture of the rear optical system.

[0090] The sixth lens has positive optical power, with both its first and second sides being convex. This positive optical power convergence of light rays, combined with the negative optical power of the fifth lens, further reduces aberrations and ensures smooth, efficient light convergence at the image plane, reducing overall weight and cost. The convex second side of the sixth lens, when combined with the convex first side of the seventh lens, facilitates a smooth light transition and reduces tolerance sensitivity. The cementation of the fifth and sixth lenses ablates chromatic aberration by mitigating residual higher-order chromatic aberrations to balance system chromatic aberration. Furthermore, this cemented lens is composed of a positive and a negative lens, with the positive lens having a lower refractive index and the negative lens having a higher refractive index. This combination of high and low refractive indices facilitates rapid light transition, increases aperture diameter, and enhances light transmission, improving image quality in low-light conditions. Additionally, using cemented lenses in optical lenses promotes a compact overall structure, meeting miniaturization requirements, and reducing tolerance sensitivity issues such as tilting and eccentricity during lens assembly.

[0091] The sixth lens has negative optical power, with both its first and second sides being concave. This negative optical power allows the sixth lens to diverge light, reducing aberrations when combined with the positive optical power of the fifth lens. Furthermore, the concave second side of the sixth lens, combined with the convex surface of the seventh lens, further reduces field curvature, ensuring smoother light delivery to the imaging plane and reducing overall weight and cost. The cementation of the fifth and sixth lenses achromaticly eliminates chromatic aberration by mitigating residual higher-order chromatic aberrations to balance the system's overall chromatic aberration. This cemented lens is composed of a positive and a negative lens, with the positive lens having a lower refractive index and the negative lens having a higher refractive index. This combination of high and low refractive indices facilitates rapid transition of light from the front, increases the aperture, and enhances light transmission, thus improving image quality in low-light conditions. Additionally, using cemented lenses in optical lenses results in a more compact overall structure, meeting miniaturization requirements and reducing tolerance sensitivity issues such as tilting and eccentricity during lens assembly.

[0092] The seventh lens has positive optical power. Both its first and second sides are convex. The second side of the seventh lens curves towards the first side, resulting in a larger deflection angle for light rays exiting through it. When paired with the negative optical power of the sixth lens, this effectively reduces aberrations, corrects field curvature and astigmatism, and allows light rays passing through the cemented lens to smoothly transition to the imaging plane. As an aspherical lens located in front of the imaging plane, the seventh lens introduces significant distortion at the edges of the field of view, improving central angular resolution. It also further corrects astigmatism and field curvature, enhancing the resolving power of the optical lens.

[0093] The seventh lens has negative optical power. Its first side is concave, and its second side is convex. The light rays exiting from the second side of the seventh lens exhibit a larger deflection angle. Combined with the negative optical power of the sixth lens, this effectively reduces aberrations, corrects field curvature and astigmatism, and allows light rays passing through the cemented lens to smoothly transition to the imaging plane. As an aspherical lens located in front of the imaging plane, the seventh lens introduces significant distortion at the edges of the field of view, improving central angular resolution. It further corrects astigmatism and field curvature, enhancing the resolving power of the optical lens. Attached Figure Description

[0094] 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:

[0095] Figure 1 A schematic diagram of the optical lens structure of Example 1 of the present invention is shown;

[0096] Figure 2 A schematic diagram of the optical lens structure of Example 2 of the present invention is shown;

[0097] Figure 3 A schematic diagram of the optical lens structure of Example 3 of the present invention is shown;

[0098] Figure 4 A schematic diagram of the optical lens structure of Example 4 of the present invention is shown;

[0099] Figure 5 A schematic diagram of the optical lens structure of Example 5 of the present invention is shown;

[0100] Figure 6 A schematic diagram of the optical lens structure of Example Six of the present invention is shown;

[0101] Figure 7 A schematic diagram of the optical lens structure of Example Seven of the present invention is shown;

[0102] Figure 8 A schematic diagram of the optical lens structure of Example 8 of the present invention is shown;

[0103] Figure 9 A schematic diagram of the optical lens structure of Example Nine of the present invention is shown;

[0104] Figure 10 A schematic diagram of the optical lens structure of Example 10 of the present invention is shown. Detailed Implementation

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 first side surface of the lens, and the surface of each lens closest to the image side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly 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 first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0111] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0112] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0113] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0114] In order to solve at least one of the problems in existing optical lenses, such as the inability to simultaneously achieve miniaturization and high resolution, pixel difference, poor imaging quality in low-light environments, and the inability to match the center angular resolution with higher pixel chips while satisfying a large field of view, the present invention provides an optical lens and an electronic device having the same.

[0115] Example 1

[0116] like Figures 1 to 10As 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. The first lens has negative optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave. The second lens has optical power, a first side surface of the second lens is concave, and a second side surface of the second lens is convex. The third lens has positive optical power, a first side surface of the third lens is convex, and a second side surface of the third lens is convex. The fourth lens has positive optical power, and a second side surface of the fourth lens is convex. The fifth lens has optical power. The sixth lens has optical power, and the first and second side surfaces of the sixth lens have the same shape. The seventh lens has optical power, and a second side surface of the seventh lens is convex.

[0117] The first lens has negative optical power, a convex first side surface, and a concave second side surface. Setting the first lens to have negative optical power allows for light divergence, and the convex first side surface provides a smaller angle of incidence, facilitating more light entering the optical system and achieving a wide field of view. The concave second side surface controls the trajectory of large-angle rays at the edges, providing a larger light-receiving surface for the rear optical system. The first lens is an aspherical lens, and the radii of curvature of its first and second sides are relatively close, making it approximately a concentric meniscus lens. This results in a longer focal length, meeting the requirements for telephoto lenses. Simultaneously, the convex center of the first lens and the small angle at the edges help collect edge field rays and compress the height of these rays at the image plane, contributing to a large central angular resolution and the resolution of more details. Furthermore, the use of a high-refractive-index material in the first lens allows for a smaller front aperture and improved image quality.

[0118] Optionally, the second lens has positive optical power, with a concave first side and a convex second side. The positive optical power of the second lens allows it to converge light rays. Its meniscus shape, concave towards the first side, further converges light rays entering through the first lens. Combined with the third lens, this effectively reduces the projection height of light onto the lens, facilitating a reduction in the overall aperture of the optical lens, enabling miniaturization and cost reduction. Furthermore, because the curvatures of the first and second sides of the second lens are similar, it facilitates a smooth transition of light across the second lens, reducing field curvature and sensitivity, and improving image quality.

[0119] Optionally, the second lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the second lens diverges light rays. Its meniscus shape, concave towards the first side, further diverges the light rays passing through the first lens. Combined with the third lens, this effectively reduces the projection height of light onto the lens, facilitating a reduction in the overall aperture of the optical lens, achieving miniaturization and cost reduction. Furthermore, because the curvatures of the first and second sides of the second lens are similar, it facilitates a smooth transition of light across the second lens, reducing field curvature and sensitivity, and improving image quality.

[0120] The third lens has positive optical power, and both its first and second sides are convex. This positive optical power allows light rays to converge, enabling diverging light to enter the rear optical system smoothly. It also lowers the angle of light entering the rear optical system, reducing the rear aperture and facilitating lens miniaturization. Furthermore, the convex second side of the third lens further reduces the rear aperture, contributing to miniaturization.

[0121] Optionally, the fourth lens has positive optical power, with its first side surface being concave and its second side surface being convex. The fourth lens with positive optical power further converges the light rays, allowing them to smoothly transition into the rear optical system, thus improving the image quality of the optical lens. Simultaneously, it further reduces the light beam's trajectory, which is beneficial for miniaturizing the rear optical system and further reducing the front aperture.

[0122] Optionally, the fourth lens has positive optical power, and both its first and second sides are convex. The fourth lens with positive optical power further converges light, allowing it to smoothly transition into the rear optical system, thus improving the image quality of the optical lens. Simultaneously, the light-converging effect of the fourth lens allows for a larger aperture, enabling greater light intake and increasing image brightness.

[0123] Optionally, the fifth lens has positive optical power, and both its first and second sides are convex. The fifth lens with positive optical power converges light rays and, when used in conjunction with the third and fourth lenses, further reduces the incident height of the light, decreasing the aperture of the rear optical system and achieving miniaturization.

[0124] Optionally, the fifth lens has negative optical power, its first side surface is convex, and its second side surface is concave. Two consecutive lenses with positive optical power are positioned in front of the fifth lens, both converging light rays. While continuously altering the light path, this also introduces significant aberrations. The fifth lens with negative optical power diverges light rays. By controlling the focal length of the fifth lens, various aberrations introduced by the front positive lens can be effectively corrected, improving the image quality of the optical lens.

[0125] Optionally, the fifth lens has negative optical power, and both its first and second sides are concave. Two consecutive lenses with positive optical power are positioned in front of the fifth lens, both converging light rays and introducing significant aberrations while continuously altering the light path. The fifth lens with negative optical power diverges light rays. By controlling the shape and focal length of the fifth lens, various aberrations introduced by the front positive lenses can be effectively corrected, improving the image quality of the optical lens and simultaneously adjusting the effective aperture of the rear optical system.

[0126] Optionally, the sixth lens has positive optical power, and both its first and second sides are convex. The sixth lens with positive optical power converges light rays, and when combined with the fifth lens with negative optical power, it further reduces aberrations. Simultaneously, it ensures that the light rays converge effectively and smoothly at the final point, allowing them to reach the imaging plane smoothly, thus reducing overall weight and cost. The convex second side of the sixth lens, when combined with the seventh lens whose first side is convex, allows for a smooth light transition and reduces tolerance sensitivity. The cementation of the fifth and sixth lenses can eliminate chromatic aberration by using residual higher-order chromatic aberrations to balance the chromatic aberration of the system. In addition, the cemented lens is composed of a positive lens and a negative lens, where the positive lens has a lower refractive index and the negative lens has a higher refractive index than the positive lens. The combination of high and low refractive indices is conducive to the rapid transition of light from the front, increasing the aperture and light transmission, which is beneficial to improving the imaging quality in dark environments. Furthermore, the use of cemented lenses in optical lenses is conducive to the overall compact structure, which is conducive to meeting the requirements of miniaturization, while reducing tolerance sensitivity problems such as tilting and eccentricity caused during the assembly of lens units.

[0127] Optionally, the sixth lens has negative optical power, with both its first and second sides being concave. The negative optical power of the sixth lens diverges light, and when combined with the positive optical power of the fifth lens, it reduces aberrations. Simultaneously, the concave second side of the sixth lens, when combined with the convex surface of the seventh lens, further reduces field curvature, allowing light to reach the imaging plane smoothly, thus reducing overall weight and cost. Cementing the fifth and sixth lenses together can achromaticize, balancing system chromatic aberration through residual higher-order chromatic aberrations. Furthermore, this cemented lens is composed of a positive and a negative lens, with the positive lens having a lower refractive index and the negative lens having a higher refractive index relative to the positive lens. This combination of high and low refractive indices facilitates rapid transition of light from the front, increases the aperture, and enhances light transmission, thus improving image quality in low-light conditions. Additionally, using cemented lenses in optical lenses contributes to a compact overall structure, meeting miniaturization requirements, and reducing tolerance sensitivity issues such as tilting and eccentricity during lens assembly.

[0128] Optionally, the seventh lens has positive optical power, and both its first and second sides are convex. The seventh lens has positive optical power, and its second side is a convex surface curving towards the first side. Light rays exiting from the second side of the seventh lens exhibit a larger deflection angle. Combined with the negative optical power of the sixth lens, this effectively reduces aberrations, corrects field curvature and astigmatism, and allows light rays passing through the cemented lens to smoothly transition to the imaging plane. As the seventh lens is an aspherical lens located in front of the imaging plane, it introduces greater distortion at the edges of the field of view, which can improve the central angular resolution. Simultaneously, it can further correct astigmatism and field curvature, thereby enhancing the resolving power of the optical lens.

[0129] Optionally, the seventh lens has negative optical power, its first side surface is concave, and its second side surface is convex. The negative optical power of the seventh lens, coupled with its convex second side surface curving towards the first side, results in a larger deflection angle for light rays exiting through the second side of the seventh lens. This, combined with the negative optical power of the sixth lens, effectively reduces aberrations, corrects field curvature and astigmatism, and allows light rays passing through the cemented lens to smoothly transition to the imaging plane. As the seventh lens is an aspherical lens located in front of the imaging plane, it introduces greater distortion at the edges of the field of view, improving central angular resolution. Furthermore, it can further correct astigmatism and field curvature, enhancing the resolving power of the optical lens.

[0130] In this embodiment, the first lens, second lens, third lens, and seventh lens are all aspherical lenses. This arrangement is beneficial for achieving a large field of view, large image height, large central angular resolution, correction of field curvature and astigmatism, and improved resolution.

[0131] In this embodiment, the fifth and sixth lenses are cemented lenses. Cemented lenses are beneficial for eliminating chromatic aberration in optical lenses, while also making the overall structure of the optical lens more compact, meeting miniaturization requirements, and reducing tolerance sensitivity issues such as tilting and eccentricity of the lens unit during assembly. The cemented lens is composed of a positive lens and a negative lens, where the positive lens has a lower refractive index and the negative lens has a higher refractive index than the positive lens. This combination of high and low refractive indices facilitates rapid transition of light rays, reduces aberrations, increases aperture diameter, improves light transmission, and enhances imaging quality in low-light environments.

[0132] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. Placing the aperture stop between the second and third lenses optimizes the distribution of light rays between the front and rear lens groups, shortens the overall length of the optical lens, and reduces the aperture of the front and rear lens groups.

[0133] Optionally, the first side of the seventh lens has a recurve point, and the second side of the seventh lens also has a recurve point. This arrangement helps to balance the aberrations in the central and peripheral fields of view, thereby improving resolution.

[0134] Optionally, the first side surface of the first lens has a recurve point. The setting of the recurve point helps to balance the aberrations of the central field of view and the edge field of view, thereby improving the resolution of the optical lens.

[0135] Optionally, the first side of the first lens has a recurve point, the first side of the seventh lens has a recurve point, and the second side of the seventh lens has a recurve point. The presence of recurve points helps to balance aberrations in the central and peripheral fields of view, thereby improving the resolution of the optical lens.

[0136] Optionally, the first side surface of the first lens has a recurve point. The setting of the recurve point helps to balance the aberrations of the central field of view and the edge field of view, thereby improving the resolution of the optical lens.

[0137] In this embodiment, the total length (TTL) of the optical lens and the focal length (F) of the optical lens satisfy the condition: TTL / F ≤ 6. Controlling the ratio of the total length to the focal length of the optical lens within a reasonable range is beneficial for miniaturizing the optical lens. Preferably, TTL / F ≤ 5.

[0138] In this embodiment, the entrance pupil diameter ENPD of the optical lens and the focal length F of the optical lens satisfy the following relationship: F / ENPD ≤ 2.2. Controlling the ratio of the focal length to the entrance pupil diameter of the optical lens within a reasonable range is beneficial for increasing the light transmission of the optical lens and improving the imaging quality of the optical lens in low-light environments. Preferably, F / ENPD ≤ 1.8.

[0139] In this embodiment, the total length (TTL) of the optical lens and the maximum aperture (DMAX) of all lenses in the optical lens satisfy the condition: TTL / DMAX ≤ 5. Controlling the ratio of the total length of the optical lens to the maximum aperture of all lenses within a reasonable range is beneficial for a more compact overall structure and a smaller front aperture of the optical lens, thus promoting miniaturization. Preferably, TTL / DMAX ≤ 3.5.

[0140] In this embodiment, the total length (TTL) 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 ≤ 0.06. Under the same field of view and image height, this facilitates a reduction in the size of the optical lens, achieving miniaturization. Preferably, TTL / H / FOV ≤ 0.04.

[0141] In this embodiment, the focal length F 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: (FOV×F) / H≥80. This setting allows the optical lens to simultaneously achieve the effects of telephoto and a large field of view, realizing a large angular resolution in the center field of view. Preferably, (FOV×F) / H≥95.

[0142] In this embodiment, the maximum aperture (DMAX) of all lenses in 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: DMAX / H / FOV ≤ 0.2. Controlling DMAX / H / FOV within a reasonable range is beneficial for reducing the front aperture of the optical lens and for achieving miniaturization. Preferably, DMAX / H / FOV ≤ 0.15.

[0143] In this embodiment, the radian θ of the maximum field of view of the optical lens, the 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: (H / 2) / (F) tan(θ / 2))≥0.1. With the same ideal image height, a larger actual image height at the edges is beneficial for achieving large-angle resolution at the center. Preferably, (H / 2) / (F) tan(θ / 2))≥0.2.

[0144] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.3 ≤ F / H ≤ 2. Controlling the focal length and image height of the optical lens within a certain range is beneficial for improving the resolution of the optical lens. Preferably, 0.5 ≤ F / H ≤ 1.2.

[0145] In this embodiment, the angle subtended by the first side of the first lens at its maximum field of view, arctan(1 / K(S1)), satisfies: arctan(1 / K(S1)) ≤ 12. The small edge angle of the first side of the first lens is beneficial for collecting edge field rays. Furthermore, the first side of the first lens is aspherical, with a convex center, resulting in a small edge angle, making it easy to distinguish between edge and center field rays. In a large field of view, the large distortion introduced at the edges can achieve a large angular resolution at the center. Preferably, arctan(1 / K(S1)) ≤ 8.

[0146] In this embodiment, the sag SAG1 of the first side surface of the first lens at the maximum field of view and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG1 / D1) ≤ 0.6. By controlling the ratio of the sag of the first side surface of the first lens to the maximum aperture to be within a small range, the first side surface of the first lens is aspherical. Under a large field of view, the first side surface of the first lens is convex at the center and has a small edge angle, which is beneficial for collecting edge field rays and reducing the height of the edge field rays incident on the image plane, thus achieving a large central angular resolution. Preferably, arctan(SAG1 / D1) ≤ 0.25.

[0147] In this embodiment, the sag SAG2 of the second side surface of the first lens at the maximum field of view and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG2 / D2) ≥ 0.05. The larger sag of the second side surface of the first lens facilitates the rapid deflection of large-angle peripheral light rays entering the first lens, collecting edge light rays into the second lens and improving image quality. Preferably, arctan(SAG2 / D2) ≥ 0.12.

[0148] In this embodiment, the sag SAG11 of the second side surface of the fifth lens at the maximum field of view and the maximum aperture D11 of the second side surface of the fifth lens corresponding to the maximum field of view satisfy the following condition: |arctan(SAG11 / D11)|≥0.08. This setting results in a larger angle of the cemented surface, which is beneficial for the rapid focusing of peripheral light and improves the imaging quality of the optical lens. Preferably, |arctan(SAG11 / D11)|≥0.13.

[0149] In this embodiment, the radius of curvature R14 of the second side surface of the seventh lens satisfies the condition R14 / F ≤ -0.001 with respect to the focal length F of the optical lens. The second side surface of the seventh lens is a convex surface curved towards the first side. Light rays emitted from the second side surface of the seventh lens exhibit a larger deflection angle, introducing greater distortion at the edge of the field of view, thus achieving a large-angle resolution at the center. Preferably, R14 / F ≤ -0.05.

[0150] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: F3 / F4≤5. The similar focal lengths of the third and fourth lenses facilitate a smooth transition of light, which is beneficial for improving the image quality of the optical lens. Preferably, F3 / F4≤3.

[0151] In this embodiment, the total length TTL of the optical lens and the center distance d67 between the sixth and seventh lenses satisfy the condition: d67 / TTL ≥ 0.03. The increased center distance between the sixth and seventh lenses results in a smoother light path emitted through the cemented joint, which helps reduce sensitivity. Preferably, d67 / TTL ≥ 0.045.

[0152] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: R3 / R4≥0.01. The second lens is a thick meniscus lens that curves towards the first side, and the shape of the second lens is beneficial for reducing the front aperture of the first lens and the optical system. Preferably, R3 / R4≥0.3.

[0153] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the condition: F7 / F6 ≤ -0.001. The optical power signs of the sixth and seventh lenses are opposite, and there is a large distance between them, which is beneficial for correcting field curvature and improving image quality. Preferably, F7 / F6 ≤ -0.5.

[0154] Example 2

[0155] like Figures 1 to 10 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. 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 optical power; the sixth lens has optical power; and the seventh lens has optical power. The radius of curvature R14 of the second side surface of the seventh lens satisfies the following relationship with the focal length F of the optical lens: R14 / F ≤ -0.001. The second side surface of the seventh lens is a convex surface curved towards the first side. Light rays emitted from the second side surface of the seventh lens are deflected at a large angle, introducing greater distortion at the edge of the field of view, but achieving a large angular resolution at the center. Preferably, R14 / F ≤ -0.05.

[0156] The first lens has negative optical power, a convex first side surface, and a concave second side surface. Setting the first lens to have negative optical power allows for light divergence, and the convex first side surface provides a smaller angle of incidence, facilitating more light entering the optical system and achieving a wide field of view. The concave second side surface controls the trajectory of large-angle rays at the edges, providing a larger light-receiving surface for the rear optical system. The first lens is an aspherical lens, and the radii of curvature of its first and second sides are relatively close, making it approximately a concentric meniscus lens. This results in a longer focal length, meeting the requirements for telephoto lenses. Simultaneously, the convex center of the first lens and the small angle at the edges help collect edge field rays and compress the height of these rays at the image plane, contributing to a large central angular resolution and the resolution of more details. Furthermore, the use of a high-refractive-index material in the first lens allows for a smaller front aperture and improved image quality.

[0157] Optionally, the second lens has positive optical power, with a concave first side and a convex second side. The positive optical power of the second lens, combined with the first lens, minimizes the impact of the second lens on the light path passing through the first lens. The concave first side of the second lens ensures that the light emitted from it maintains an upward trajectory. Under the same field of view, this provides a larger light-receiving surface for the rear optical system. This benefits the image plane and aperture expansion, allowing for greater light intake, increased image brightness, and improved image quality in low-light conditions. The meniscus shape concave towards the first side collects the light entering through the first lens. Because the curvatures of the first and second sides of the second lens are similar, it facilitates a smooth transition of light across the second lens, reducing sensitivity and field curvature, and improving image quality. Furthermore, the concave first side of the second lens, combined with the similarly concave second side of the first lens, allows for a reduction in the front aperture of the optical lens, which helps to reduce the size of the optical lens, thereby reducing cost and achieving miniaturization.

[0158] Optionally, the second lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the second lens diverges light rays. The concave first side ensures that light rays maintain an upward trajectory after passing through it, reaching a higher position on the image plane after entering the rear optical system, thus expanding the image area. The combination of a concave first side and a convex second side allows for a smooth transition of light, increasing the amount of incident light into the rear optical system, achieving greater light intake, and increasing image brightness. Furthermore, the similar curvature of the first and second sides of the second lens facilitates a smooth transition of light across the lens, reducing sensitivity. The combination of a concave first side and a concave second side of the first lens also allows for a reduction in the front aperture of the optical lens, which helps to reduce the size of the optical lens, thereby reducing cost and achieving miniaturization.

[0159] The third lens has positive optical power, and both its first and second sides are convex. This positive optical power allows light rays to converge, enabling diverging light to enter the rear optical system smoothly. It also lowers the angle of light entering the rear optical system, reducing the rear aperture and facilitating lens miniaturization. Furthermore, the convex second side of the third lens further reduces the rear aperture, contributing to miniaturization.

[0160] Optionally, the fourth lens has positive optical power, with its first side surface being concave and its second side surface being convex. The fourth lens with positive optical power further converges the light rays, allowing them to smoothly transition into the rear optical system, thus improving the image quality of the optical lens. Simultaneously, it further reduces the light beam's trajectory, which is beneficial for miniaturizing the rear optical system and further reducing the front aperture.

[0161] Optionally, the fourth lens has positive optical power, and both its first and second sides are convex. The fourth lens with positive optical power further converges light, allowing it to smoothly transition into the rear optical system, thus improving the image quality of the optical lens. Simultaneously, the light-converging effect of the fourth lens allows for a larger aperture, enabling greater light intake and increasing image brightness.

[0162] Optionally, the fifth lens has positive optical power, and both its first and second sides are convex. The fifth lens with positive optical power converges light rays and, when used in conjunction with the third and fourth lenses, further reduces the incident height of the light, decreasing the aperture of the rear optical system and achieving miniaturization.

[0163] Optionally, the fifth lens has negative optical power, its first side surface is convex, and its second side surface is concave. Two consecutive lenses with positive optical power are positioned in front of the fifth lens, both converging light rays. While continuously altering the light path, this also introduces significant aberrations. The fifth lens with negative optical power diverges light rays. By controlling the focal length of the fifth lens, various aberrations introduced by the front positive lens can be effectively corrected, improving the image quality of the optical lens.

[0164] Optionally, the fifth lens has negative optical power, and both its first and second sides are concave. Two consecutive lenses with positive optical power are positioned in front of the fifth lens, both converging light rays and introducing significant aberrations while continuously altering the light path. The fifth lens with negative optical power diverges light rays. By controlling the shape and focal length of the fifth lens, various aberrations introduced by the front positive lenses can be effectively corrected, improving the image quality of the optical lens and simultaneously adjusting the effective aperture of the rear optical system.

[0165] Optionally, the sixth lens has positive optical power, and both its first and second sides are convex. The sixth lens with positive optical power converges light rays, and when combined with the fifth lens with negative optical power, it further reduces aberrations. Simultaneously, it ensures that the light rays converge effectively and smoothly at the final point, allowing them to reach the imaging plane smoothly, thus reducing overall weight and cost. The convex second side of the sixth lens, when combined with the seventh lens whose first side is convex, allows for a smooth light transition and reduces tolerance sensitivity. The cementation of the fifth and sixth lenses can eliminate chromatic aberration by using residual higher-order chromatic aberrations to balance the chromatic aberration of the system. In addition, the cemented lens is composed of a positive lens and a negative lens, where the positive lens has a lower refractive index and the negative lens has a higher refractive index than the positive lens. The combination of high and low refractive indices is conducive to the rapid transition of light from the front, increasing the aperture and light transmission, which is beneficial to improving the imaging quality in dark environments. Furthermore, the use of cemented lenses in optical lenses is conducive to the overall compact structure, which is conducive to meeting the requirements of miniaturization, while reducing tolerance sensitivity problems such as tilting and eccentricity caused during the assembly of lens units.

[0166] Optionally, the sixth lens has negative optical power, with both its first and second sides being concave. The negative optical power of the sixth lens diverges light, and when combined with the positive optical power of the fifth lens, it reduces aberrations. Simultaneously, the concave second side of the sixth lens, when combined with the convex surface of the seventh lens, further reduces field curvature, allowing light to reach the imaging plane smoothly, thus reducing overall weight and cost. Cementing the fifth and sixth lenses together can achromaticize, balancing system chromatic aberration through residual higher-order chromatic aberrations. Furthermore, this cemented lens is composed of a positive and a negative lens, with the positive lens having a lower refractive index and the negative lens having a higher refractive index relative to the positive lens. This combination of high and low refractive indices facilitates rapid transition of light from the front, increases the aperture, and enhances light transmission, thus improving image quality in low-light conditions. Additionally, using cemented lenses in optical lenses contributes to a compact overall structure, meeting miniaturization requirements, and reducing tolerance sensitivity issues such as tilting and eccentricity during lens assembly.

[0167] Optionally, the seventh lens has positive optical power, and both its first and second sides are convex. The seventh lens, with its positive optical power, works in conjunction with the sixth lens, which has negative optical power, to correct field curvature and astigmatism, allowing light rays passing through the cemented lens to smoothly transition to the imaging plane. Furthermore, as an aspherical lens, the seventh lens can further correct astigmatism and field curvature, improving the resolving power of the optical lens.

[0168] Optionally, the seventh lens has negative optical power, its first side surface is concave, and its second side surface is convex. The seventh lens with negative optical power, in conjunction with the sixth lens with positive optical power, can correct field curvature and astigmatism, allowing light rays passing through the cemented lens to smoothly transition to the imaging plane. Furthermore, as the seventh lens is an aspherical lens, it can further correct astigmatism and field curvature, improving the resolving power of the optical lens.

[0169] In this embodiment, the first lens, second lens, third lens, and seventh lens are all aspherical lenses. This arrangement is beneficial for achieving a large field of view, large image height, large central angular resolution, correction of field curvature and astigmatism, and improved resolution.

[0170] In this embodiment, the fifth and sixth lenses are cemented lenses. Cemented lenses are beneficial for eliminating chromatic aberration in optical lenses, while also making the overall structure of the optical lens more compact, meeting miniaturization requirements, and reducing tolerance sensitivity issues such as tilting and eccentricity of the lens unit during assembly. The cemented lens is composed of a positive lens and a negative lens, where the positive lens has a lower refractive index and the negative lens has a higher refractive index than the positive lens. This combination of high and low refractive indices facilitates rapid transition of light rays, reduces aberrations, increases aperture diameter, improves light transmission, and enhances imaging quality in low-light environments.

[0171] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. Placing the aperture stop between the second and third lenses optimizes the distribution of light rays between the front and rear lens groups, shortens the overall length of the optical lens, and reduces the aperture of the front and rear lens groups.

[0172] Optionally, the first side of the seventh lens has a recurve point, and the second side of the seventh lens also has a recurve point. This arrangement helps to balance the aberrations in the central and peripheral fields of view, thereby improving resolution.

[0173] Optionally, the first side surface of the first lens has a recurve point. The setting of the recurve point helps to balance the aberrations of the central field of view and the edge field of view, thereby improving the resolution of the optical lens.

[0174] Optionally, the first side of the first lens has a recurve point, the first side of the seventh lens has a recurve point, and the second side of the seventh lens has a recurve point. The presence of recurve points helps to balance aberrations in the central and peripheral fields of view, thereby improving the resolution of the optical lens.

[0175] Optionally, the first side surface of the first lens has a recurve point. The setting of the recurve point helps to balance the aberrations of the central field of view and the edge field of view, thereby improving the resolution of the optical lens.

[0176] In this embodiment, the total length (TTL) of the optical lens and the focal length (F) of the optical lens satisfy the condition: TTL / F ≤ 6. Controlling the ratio of the total length to the focal length of the optical lens within a reasonable range is beneficial for miniaturizing the optical lens. Preferably, TTL / F ≤ 5.

[0177] In this embodiment, the entrance pupil diameter ENPD of the optical lens and the focal length F of the optical lens satisfy the following relationship: F / ENPD ≤ 2.2. Controlling the ratio of the focal length to the entrance pupil diameter of the optical lens within a reasonable range is beneficial for increasing the light transmission of the optical lens and improving the imaging quality of the optical lens in low-light environments. Preferably, F / ENPD ≤ 1.8.

[0178] In this embodiment, the total length (TTL) of the optical lens and the maximum aperture (DMAX) of all lenses in the optical lens satisfy the condition: TTL / DMAX ≤ 5. Controlling the ratio of the total length of the optical lens to the maximum aperture of all lenses within a reasonable range is beneficial for a more compact overall structure and a smaller front aperture of the optical lens, thus promoting miniaturization. Preferably, TTL / DMAX ≤ 3.5.

[0179] In this embodiment, the total length (TTL) 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 ≤ 0.06. Under the same field of view and image height, this facilitates a reduction in the size of the optical lens, achieving miniaturization. Preferably, TTL / H / FOV ≤ 0.04.

[0180] In this embodiment, the focal length F 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: (FOV×F) / H≥80. This setting allows the optical lens to simultaneously achieve the effects of telephoto and a large field of view, realizing a large angular resolution in the center field of view. Preferably, (FOV×F) / H≥95.

[0181] In this embodiment, the maximum aperture (DMAX) of all lenses in 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: DMAX / H / FOV ≤ 0.2. Controlling DMAX / H / FOV within a reasonable range is beneficial for reducing the front aperture of the optical lens and for achieving miniaturization. Preferably, DMAX / H / FOV ≤ 0.15.

[0182] In this embodiment, the radian θ of the maximum field of view of the optical lens, the 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: (H / 2) / (F) tan(θ / 2))≥0.1. With the same ideal image height, a larger actual image height at the edges is beneficial for achieving large-angle resolution at the center. Preferably, (H / 2) / (F) tan(θ / 2))≥0.2.

[0183] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.3 ≤ F / H ≤ 2. Controlling the focal length and image height of the optical lens within a certain range is beneficial for improving the resolution of the optical lens. Preferably, 0.5 ≤ F / H ≤ 1.2.

[0184] In this embodiment, the angle subtended by the first side of the first lens at its maximum field of view, arctan(1 / K(S1)), satisfies: arctan(1 / K(S1)) ≤ 12. The small edge angle of the first side of the first lens is beneficial for collecting edge field rays. Furthermore, the first side of the first lens is aspherical, with a convex center, resulting in a small edge angle, making it easy to distinguish between edge and center field rays. In a large field of view, the large distortion introduced at the edges can achieve a large angular resolution at the center. Preferably, arctan(1 / K(S1)) ≤ 8.

[0185] In this embodiment, the sag SAG1 of the first side surface of the first lens at the maximum field of view and the maximum aperture D1 of the first side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG1 / D1) ≤ 0.6. By controlling the ratio of the sag of the first side surface of the first lens to the maximum aperture to be within a small range, the first side surface of the first lens is aspherical. Under a large field of view, the first side surface of the first lens is convex at the center and has a small edge angle, which is beneficial for collecting edge field rays and reducing the height of the edge field rays incident on the image plane, thus achieving a large central angular resolution. Preferably, arctan(SAG1 / D1) ≤ 0.25.

[0186] In this embodiment, the sag SAG2 of the second side surface of the first lens at the maximum field of view and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG2 / D2) ≥ 0.05. The larger sag of the second side surface of the first lens facilitates the rapid deflection of large-angle peripheral light rays entering the first lens, collecting edge light rays into the second lens and improving image quality. Preferably, arctan(SAG2 / D2) ≥ 0.12.

[0187] In this embodiment, the sag SAG11 of the second side surface of the fifth lens at the maximum field of view and the maximum aperture D11 of the second side surface of the fifth lens corresponding to the maximum field of view satisfy the following condition: |arctan(SAG11 / D11)|≥0.08. This setting results in a larger angle of the cemented surface, which is beneficial for the rapid focusing of peripheral light and improves the imaging quality of the optical lens. Preferably, |arctan(SAG11 / D11)|≥0.13.

[0188] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the condition: F7 / F6 ≤ -0.001. The optical power signs of the sixth and seventh lenses are opposite, and there is a large distance between them, which is beneficial for correcting field curvature and improving image quality. Preferably, F7 / F6 ≤ -0.5.

[0189] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: F3 / F4≤5. The similar focal lengths of the third and fourth lenses facilitate a smooth transition of light, which is beneficial for improving the image quality of the optical lens. Preferably, F3 / F4≤3.

[0190] In this embodiment, the total length TTL of the optical lens and the center distance d67 between the sixth and seventh lenses satisfy the condition: d67 / TTL ≥ 0.03. The increased center distance between the sixth and seventh lenses results in a smoother light path emitted through the cemented joint, which helps reduce sensitivity. Preferably, d67 / TTL ≥ 0.045.

[0191] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the condition: R3 / R4≥0.01. The second lens is a thick meniscus lens that curves towards the first side. The shape of the second lens facilitates a smooth transition of light rays and improves image quality. Preferably, R3 / R4≥0.3.

[0192] 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.

[0193] In the aforementioned optical lenses, the maximum field of view (FOV) and height (H) are related, using the field of view corresponding to the image height. The total optical length (TTL) of the optical lens refers to the distance along the optical axis from the first side surface of the first lens to the imaging plane of the optical lens.

[0194] The optical lens in this application may employ multiple lenses, such as the seven lenses 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 better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Specifically, when the imaging quality of the optical lens is the primary concern, all seven lenses may be aspherical lenses.

[0195] In an exemplary embodiment, the first to seventh lenses can all be glass lenses. Optical lenses made of glass can suppress the shift of the back focus of the optical lens due to temperature changes, thereby improving system stability. At the same time, using glass can avoid lens blurring caused by high and low temperature changes in the operating environment, which would affect the normal use of the lens. For example, an all-glass optical lens has a wider temperature range and can maintain stable optical performance within the range of -40°C to 105°C.

[0196] Specifically, when image quality and reliability are the primary concerns, the first through seventh lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first through seventh lenses in an optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first through seventh lenses in an optical lens can also be made from a combination of plastic and glass.

[0197] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a photosensitive coupler (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.

[0198] 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.

[0199] 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.

[0200] Example 1

[0201] like Figure 1 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0202] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0203] In this example, the focal length F of the optical lens is 10.504mm, the total length TTL of the optical lens is 44.1392mm, and the maximum field of view FOV of the optical lens is 130°.

[0204] In this example, the fifth and sixth lenses are cemented lenses, so the second side surface of the fifth lens and the first side surface of the sixth lens are both S11. However, for the first and second side surfaces, with the same radius of curvature, their surface shapes are opposite. Therefore, the second side surface S11 of the fifth lens is concave, and the first side surface S11 of the sixth lens is convex.

[0205] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0206] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0207]

[0208] Table 1

[0209] In this example, the first, second, third, and seventh lenses are aspherical lenses. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0210] Formula (1);

[0211] Where x is the distance vector from the vertex of the aspherical surface along the optical axis at a height of h; 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; and A is the higher-order coefficient. Table 2 below shows the conic coefficient k and the higher-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), G (16th-order coefficient), H (18th-order coefficient), and I (20th-order coefficient) that can be used for the aspherical lens surface in this example.

[0212]

[0213] Table 2

[0214] Example 2

[0215] like Figure 2 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA. For the sake of brevity, descriptions similar to those in Example 1 are omitted in this example and the following examples.

[0216] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0217] In this example, the focal length F of the optical lens is 9.9147mm, the total length TTL of the optical lens is 40.8646mm, and the maximum field of view FOV of the optical lens is 130°.

[0218] Both the first side surface S13 and the second side surface S14 of the seventh lens have inflection points.

[0219] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0220]

[0221] Table 3

[0222] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 4 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0223]

[0224] Table 4

[0225] Example 3

[0226] like Figure 3 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0227] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0228] In this example, the focal length F of the optical lens is 10.3001mm, the total length TTL of the optical lens is 38.9148mm, and the maximum field of view FOV of the optical lens is 130°.

[0229] The first side surface S1 of the first lens has an inflection point.

[0230] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0231]

[0232] Table 5

[0233] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 6 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0234]

[0235] Table 6

[0236] Example 4

[0237] like Figure 4 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0238] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0239] In this example, the focal length F of the optical lens is 10.2003mm, the total length TTL of the optical lens is 42.6532mm, and the maximum field of view FOV of the optical lens is 130°.

[0240] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0241]

[0242] Table 7

[0243] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 8 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0244]

[0245] Table 8

[0246] Example 5

[0247] like Figure 5 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0248] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is concave, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0249] In this example, the focal length F of the optical lens is 10.1935mm, the total length TTL of the optical lens is 37.8091mm, and the maximum field of view FOV of the optical lens is 130°.

[0250] The first side surface S1 of the first lens, the first side surface S13 of the seventh lens, and the second side surface S14 of the seventh lens all have inflection points.

[0251] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0252]

[0253] Table 9

[0254] In this example, the first, second, third, and seventh lenses are aspherical lenses. Table 10 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0255]

[0256] Table 10

[0257] Example 6

[0258] like Figure 6As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0259] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is concave, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is concave, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0260] In this example, the focal length F of the optical lens is 10.0891mm, the total length TTL of the optical lens is 39.6364mm, and the maximum field of view FOV of the optical lens is 130°.

[0261] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0262]

[0263] Table 11

[0264] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 12 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0265]

[0266] Table 12

[0267] Example 7

[0268] like Figure 7As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0269] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0270] In this example, the focal length F of the optical lens is 10.2452mm, the total length TTL of the optical lens is 39.7328mm, and the maximum field of view FOV of the optical lens is 130°.

[0271] Table 13 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0272]

[0273] Table 13

[0274] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 14 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0275]

[0276] Table 14

[0277] Example 8

[0278] like Figure 8As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0279] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S10 is convex, and its second side surface S11 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0280] In this example, the focal length F of the optical lens is 10.0991mm, the total length TTL of the optical lens is 38.6387mm, and the maximum field of view FOV of the optical lens is 130°.

[0281] Table 15 shows the basic structural parameters of the optical lens in Example 8, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0282]

[0283] Table 15

[0284] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 16 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0285]

[0286] Table 16

[0287] Example 9

[0288] like Figure 9As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0289] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has negative optical power, its first side surface S11 is concave, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0290] In this example, the focal length F of the optical lens is 10.1929mm, the total length TTL of the optical lens is 40.6417mm, and the maximum field of view FOV of the optical lens is 130°.

[0291] The first side surface S1 of the first lens has a recurved point.

[0292] Table 17 shows the basic structural parameters of the optical lens in Example 9, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0293]

[0294] Table 17

[0295] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 18 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0296]

[0297] Table 18

[0298] Example 10

[0299] like Figure 10 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter, and an imaging plane IMA.

[0300] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has negative optical power, its first side surface S11 is concave, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The filter has a first side surface S15 and a second side surface S16. Light from the object passes through surfaces S1 to S16 in sequence and is finally imaged onto the imaging surface IMA.

[0301] In this example, the focal length F of the optical lens is 10.2509mm, the total length TTL of the optical lens is 40.796mm, and the maximum field of view (FOV) of the optical lens is 130°.

[0302] The first side surface S1 of the first lens has a recurved point.

[0303] Table 19 shows the basic structural parameters of the optical lens in Example 10, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0304]

[0305] Table 19

[0306] In this example, the first lens, second lens, third lens, and seventh lens are aspherical lenses. Table 20 below shows the conic coefficient k and the coefficients of each higher-order term that can be used on the aspherical lens surface in this example.

[0307]

[0308] Table 20

[0309] In summary, Examples 1 through 12 satisfy the relationships shown in Table 21.

[0310]

[0311] Table 21

[0312] Table 22 provides the complete set of focal length values ​​F (in millimeters) for the optical lenses of Examples 1 to 10.

[0313]

[0314] Table 22

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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, including: A first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; The second lens has positive optical power, the first side of the second lens is concave, and the second side of the second lens is convex; The third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface of the third lens is convex. The fourth lens has positive optical power, and the second side surface of the fourth lens is convex. The fifth lens has negative optical power, and the second side surface of the fifth lens is concave. The sixth lens has positive optical power, and both its first and second sides are convex. The seventh lens has negative optical power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex; The fifth lens and the sixth lens are cemented lenses; The total length TTL of the optical lens and the center distance d67 between the sixth lens and the seventh lens satisfy the following condition: 0.080216128 ≥ d67 / TTL ≥ 0.03; The sag SAG1 of the first side surface of the first lens at the maximum field of view and the maximum aperture D1 of the first side surface of the first lens corresponding to the optical lens at the maximum field of view satisfy the following condition: 0.059533564≤arctan(SAG1 / D1)≤0.25; The total length TTL of the optical lens and the focal length F of the optical lens satisfy the following condition: 3.709138176≤TTL / F≤6.

2. The optical lens according to claim 1, characterized in that, The first side surface of the fourth lens is concave.

3. The optical lens according to claim 1, characterized in that, The first side surface of the fourth lens is convex.

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

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

6. The optical lens according to claim 1, characterized in that, The first lens, the second lens, the third lens, and the seventh lens are all aspherical lenses.

7. 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.

8. The optical lens according to claim 1, characterized in that, The first side surface of the seventh lens has a recurve point, and the second side surface of the seventh lens has a recurve point.

9. The optical lens according to claim 1, characterized in that, The first side surface of the first lens has a point of inflection.

10. The optical lens according to claim 1, characterized in that, The first side of the first lens has a point of inflection, the first side of the seventh lens has a point of inflection, and the second side of the seventh lens has a point of inflection.

11. The optical lens according to any one of claims 1 to 10, characterized in that, The entrance pupil diameter ENPD of the optical lens and the focal length F of the optical lens satisfy the following condition: F / ENPD≤2.

2.

12. The optical lens according to any one of claims 1 to 10, characterized in that, The total length TTL of the optical lens and the maximum aperture DMAX of all lenses in the optical lens satisfy the following condition: TTL / DMAX≤5.

13. The optical lens according to any one of claims 1 to 10, characterized in that, The total length TTL 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.

06.

14. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F 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: (FOV×F) / H≥80.

15. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum aperture DMAX of all lenses in 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: the value of DMAX / H / FOV is one of 14.8000 / 12.0989 / 130.0000, 15.0000 / 12.0932 / 130.0000, 14.2373 / 12.0430 / 130.0000, 15.0000 / 12.0936 / 130.0000, 14.0000 / 12.0509 / 130.0000, or 15.0000 / 12.1005 / 130.0000.

16. The optical lens according to any one of claims 1 to 10, characterized in that, The maximum field of view angle radian θ of the optical lens, the focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following relationship: (H / 2) / (F*tan(θ / 2))≥0.

1.

17. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.3≤F / H≤2.

18. The optical lens according to any one of claims 1 to 10, characterized in that, The subtended angle arctan(1 / K(S1)) at the maximum field of view of the first side of the first lens satisfies: arctan(1 / K(S1))≤12.

19. The optical lens according to any one of claims 1 to 10, characterized in that, The sag SAG2 of the second side surface of the first lens at the maximum field of view and the maximum aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following condition: arctan(SAG2 / D2)≥0.

05.

20. The optical lens according to any one of claims 1 to 10, characterized in that, The sag SAG11 of the second side of the fifth lens at the maximum field of view and the maximum aperture D11 of the second side of the fifth lens corresponding to the optical lens at the maximum field of view satisfy the following: |arctan(SAG11 / D11)|≥0.

08.

21. The optical lens according to any one of claims 1 to 10, characterized in that, The radius of curvature R14 of the second side surface of the seventh lens satisfies the following relationship with the focal length F of the optical lens: R14 / F≤-0.

001.

22. The optical lens according to any one of claims 1 to 10, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: F3 / F4≤5.

23. The optical lens according to any one of claims 1 to 10, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: R3 / R4≥0.

01.

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

001.

25. The optical lens according to any one of claims 1 to 10, characterized in that, The following conditions must be met: 3.709138176≤TTL / F≤5, 1.584512621≤F / ENPD≤1.8, 2.642426667≤TTL / DMAX≤3.5, TTL / H / FOV≤0.04, 112.8631528≥(FOV×F) / H≥95, 0.284393784≥(H / 2) / (F*tan(θ / 2))≥0.2, 0.5≤F / H≤1.2, arctan(1 / K(S1))≤8, 0.228848118≥ar ctan(SAG2 / D2)≥0.12, 0.219187282≥|arctan(SAG11 / D11)|≥0.13, -2.489995392≤R14 / F≤-0.941600341, 0.469236787≤F3 / F4≤3, 0.080216128≥d67 / TTL≥0.045, 1.525851478≥R3 / R4≥0.851239967, -11.67254403≤F7 / F6≤-0.5, wherein the parameters include: the optical mirror Total length of head (TTL), focal length of the optical lens (F), entrance pupil diameter (ENPD) of the optical lens, maximum aperture (DMAX) of all lenses in the optical lens, maximum field of view (FOV) of the optical lens, image height (H) corresponding to the maximum field of view of the optical lens, radian (θ) of the maximum field of view of the optical lens, angle subtended by the first side of the first lens at the maximum field of view (arctan(1 / K(S1))), sagitta (SAG2) of the second side of the first lens at the maximum field of view, and maximum aperture of the second side of the first lens corresponding to the maximum field of view of the optical lens. The optical aperture D2, the sag SAG11 at the maximum field of view of the second side of the fifth lens, the maximum aperture D11 of the second side of the fifth lens corresponding to the maximum field of view of the optical lens, the radius of curvature R14 of the second side of the seventh lens, the focal length F3 of the third lens, the focal length F4 of the fourth lens, the center distance d67 between the sixth and seventh lenses, the radius of curvature R3 of the first side of the second lens, the radius of curvature R4 of the second side of the second lens, the focal length F6 of the sixth lens, and the focal length F7 of the seventh lens.

26. The optical lens according to any one of claims 1 to 10, characterized in that, The following conditions must be met: 3.709138176≤TTL / F≤4.202132521, 1.584512621≤F / ENPD≤1.660002845, 2.642426667≤TTL / DMAX≤2.982378378, 0.024134233≤TTL / H / FOV≤0.028063072, 112.8631528≥(FOV×F) / H≥106.5814673, 0.284393784≥(H / 2) / (F*tan(θ / 2))≥0.268565125, 0.8198574 41≤F / H≤0.868178099, -3.7418≤arctan(1 / K(S1))≤3.3112, 0.059533564≤arctan(SAG1 / D1)≤0.113730074, 0.228848118≥arctan(SAG2 / D2)≥0.208998041, 0.219187282≥|arctan(SAG11 / D11)|≥0.181630442, 0.469236787≤F3 / F4≤1.25055525, 0.080216128≥d67 / TTL≥0.054 595322, -11.67254403≤F7 / F6≤-1.828964968, where the parameters include: the total length TTL of the optical lens, the focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, the maximum aperture DMAX of all lenses in the optical lens, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, the radian θ of the maximum field of view of the optical lens, the angle arctan(1 / K(S1)) at the maximum field of view of the first side of the first lens, the sagitta SAG1 at the maximum field of view of the first side of the first lens, and the optical lens... The maximum aperture D1 of the first side of the first lens at the maximum field of view, the sagitta SAG2 of the second side of the first lens at the maximum field of view, the maximum aperture D2 of the second side of the first lens at the maximum field of view, the sagitta SAG11 of the second side of the fifth lens at the maximum field of view, the maximum aperture D11 of the second side of the fifth lens at the maximum field of view, the focal length F3 of the third lens, the focal length F4 of the fourth lens, the center distance d67 between the sixth lens and the seventh lens, the focal length F6 of the sixth lens, and the focal length F7 of the seventh lens.

27. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 26 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images