Optical lenses and electronic devices

Abstract

This invention provides an optical lens and an electronic device. The optical lens includes: a first lens having positive optical power, with a convex object-side surface and a concave image-side surface; a second lens having negative optical power, with a convex object-side surface and a concave image-side surface; a third lens having optical power, with a concave object-side surface and a convex image-side surface; a fourth lens having positive optical power, with at least one of its object-side and image-side surfaces being convex; and a fifth lens having optical power. This invention solves the problem in existing optical lenses where miniaturization and high energy harvesting are difficult to achieve simultaneously.

Description

Technical Field

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

[0002] With social development and continuous technological advancements, automotive driver assistance systems (ADAS) have matured significantly, resulting in a wide variety of optical lenses. Taking automotive LiDAR lenses as an example, their application in automobiles is becoming increasingly widespread. After the radar laser is emitted, the energy of the reflected light is collected to accurately identify environmental details. Currently, automotive LiDAR lenses have a relatively large field of view (FNO), limiting energy collection. Furthermore, most current automotive LiDAR lenses have large apertures, making it difficult to achieve high energy collection while maintaining miniaturization. Some existing automotive LiDAR lenses also suffer from significant distortion, leading to image deformation and compromising image quality. Additionally, some existing automotive LiDAR lenses have short back focal lengths, which can cause assembly difficulties.

[0003] In other words, existing optical lenses suffer from the problem of simultaneously achieving miniaturization and high energy harvesting. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that it is difficult to simultaneously achieve miniaturization and high energy harvesting in existing optical lenses.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising, in sequence along the optical axis from the object side to the image side: a first lens having positive optical power, the object side of the first lens being convex and the image side being concave; a second lens having negative optical power, the object side of the second lens being convex and the image side being concave; a third lens having optical power, the object side of the third lens being concave and the image side being convex; a fourth lens having positive optical power, at least one of the object side and the image side of the fourth lens being convex; and a fifth lens having optical power.

[0006] Furthermore, the third lens has positive optical power.

[0007] Furthermore, the third lens has negative optical power.

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

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

[0010] Furthermore, the fifth lens has negative optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave.

[0011] Furthermore, the fifth lens has positive optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave.

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

[0013] Furthermore, the second lens is an aspherical lens.

[0014] Furthermore, the optical lens also includes an aperture stop, which is positioned between the first lens and the second lens.

[0015] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the object side of the first lens of the optical lens to the imaging plane of the optical lens on the optical axis, satisfies the following relationship with the total focal length F of the optical lens: TTL / F≤3.

[0016] Furthermore, the focal length F1 of the first lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: 0 ≤ F1 / F ≤ 3.

[0017] Furthermore, the total 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: |((H / 2) / (F*TAN(FOV / 2))-1|≤0.1.

[0018] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.07.

[0019] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: 1≤D / H / TAN(FOV)≤6.

[0020] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens of the optical lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV≤0.5.

[0021] Furthermore, the total optical length of the optical lens, i.e. the distance TTL from the object side of the first lens to the imaging surface of the optical lens on the optical axis, satisfies the maximum value DMAX between the maximum half-aperture of the object side of the first lens and the maximum half-aperture of the image side of the fifth lens: TTL / DMAX≤6.

[0022] Furthermore, the maximum value between the entrance pupil diameter EPD of the optical lens and the maximum half-aperture of the object side of the first lens and the maximum half-aperture of the image side of the fifth lens, DMAX, satisfies the following condition: 1.2≤EPD / DMAX.

[0023] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the following relationship: F / EPD≤2.

[0024] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤0.15.

[0025] Furthermore, the center thickness d3 of the third lens, the air gap distance d34 between the third lens and the fourth lens, the center thickness d4 of the fourth lens, the air gap distance d45 between the fourth lens and the fifth lens, and the center thickness d5 of the fifth lens satisfy the following condition: (d3+d34+d4+d45+d5) / (d3+d4+d5)≤2.

[0026] Furthermore, the central radius of curvature R6 of the object side of the third lens of the optical lens and the central radius of curvature R7 of the image side of the third lens of the optical lens satisfy the following condition: 0 ≤ R6 / R7 ≤ 2.5.

[0027] Furthermore, the central radius of curvature R10 of the object side of the fifth lens of the optical lens and the central radius of curvature R11 of the image side of the fifth lens of the optical lens satisfy the following condition: 0 ≤ R10 / R11 ≤ 2.

[0028] Furthermore, the focal length F1 of the first lens of the optical lens and the focal length F2 of the second lens of the optical lens satisfy the following condition: 0.5≤|F1 / F2|≤2.

[0029] Furthermore, the focal length F2 of the second lens of the optical lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.5≤|F2 / F|≤4.

[0030] Furthermore, the sagitta SAG31 of the object side of the third lens of the optical lens and the sagitta SAG32 of the image side of the third lens of the optical lens satisfy the following condition: 0.5≤|SAG32 / SAG31|.

[0031] Furthermore, the sagitta SAG51 of the object side of the fifth lens of the optical lens and the sagitta SAG52 of the image side of the fifth lens of the optical lens satisfy the following condition: 0.5≤|SAG51 / SAG52|.

[0032] Furthermore, the central radius of curvature R8 of the object side of the fourth lens of the optical lens and the central radius of curvature R9 of the image side of the fourth lens of the optical lens satisfy the following condition: 0.2≤|R8 / R9|≤2.8.

[0033] Furthermore, the focal length F4 of the fourth lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: |F4 / F|≤3.5.

[0034] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the image side of the fifth lens of the optical lens to the center of the imaging plane of the optical lens on the optical axis, satisfies the following condition: 0.15 ≤ BFL / TTL.

[0035] According to another aspect of the present invention, an optical lens is provided, comprising, in sequence along the optical axis from the object side to the image side: a first lens having positive optical power; a second lens having negative optical power; a third lens having optical power; a fourth lens having positive optical power; and a fifth lens having optical power; wherein the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens to the imaging plane of the optical lens on the optical axis, satisfies the following relationship with the total focal length F of the optical lens: TTL / F ≤ 3.

[0036] Furthermore, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave.

[0037] Furthermore, the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave.

[0038] Furthermore, the object-side surface of the third lens is concave, and the image-side surface of the third lens is convex.

[0039] Furthermore, the third lens has positive optical power.

[0040] Furthermore, the third lens has negative optical power.

[0041] Furthermore, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is also convex.

[0042] Furthermore, the object-side surface of the fourth lens is convex, and the image-side surface of the fourth lens is concave.

[0043] Furthermore, the fifth lens has negative optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave.

[0044] Furthermore, the fifth lens has positive optical power, the object side of the fifth lens is convex, and the image side of the fifth lens is concave.

[0045] Furthermore, the fifth lens has negative optical power, the object side of the fifth lens is concave, and the image side of the fifth lens is convex.

[0046] Furthermore, the second lens is an aspherical lens.

[0047] Furthermore, the optical lens also includes an aperture stop, which is positioned between the first lens and the second lens.

[0048] Furthermore, the focal length F1 of the first lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: 0 ≤ F1 / F ≤ 3.

[0049] Furthermore, the total 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: |((H / 2) / (F*TAN(FOV / 2))-1|≤0.1.

[0050] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.07.

[0051] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: 1≤D / H / TAN(FOV)≤6.

[0052] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens of the optical lens to the imaging surface of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV≤0.5.

[0053] Furthermore, the total optical length of the optical lens, i.e. the distance TTL from the object side of the first lens to the imaging surface of the optical lens on the optical axis, satisfies the maximum value DMAX between the maximum half-aperture of the object side of the first lens and the maximum half-aperture of the image side of the fifth lens: TTL / DMAX≤6.

[0054] Furthermore, the maximum value between the entrance pupil diameter EPD of the optical lens and the maximum half-aperture of the object side of the first lens and the maximum half-aperture of the image side of the fifth lens, DMAX, satisfies the following condition: 1.2≤EPD / DMAX.

[0055] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the following relationship: F / EPD≤2.

[0056] Furthermore, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤0.15.

[0057] Furthermore, the center thickness d3 of the third lens, the air gap distance d34 between the third lens and the fourth lens, the center thickness d4 of the fourth lens, the air gap distance d45 between the fourth lens and the fifth lens, and the center thickness d5 of the fifth lens satisfy the following condition: (d3+d34+d4+d45+d5) / (d3+d4+d5)≤2.

[0058] Furthermore, the central radius of curvature R6 of the object side of the third lens of the optical lens and the central radius of curvature R7 of the image side of the third lens of the optical lens satisfy the following condition: 0 ≤ R6 / R7 ≤ 2.5.

[0059] Furthermore, the central radius of curvature R10 of the object side of the fifth lens of the optical lens and the central radius of curvature R11 of the image side of the fifth lens of the optical lens satisfy the following condition: 0 ≤ R10 / R11 ≤ 2.

[0060] Furthermore, the focal length F1 of the first lens of the optical lens and the focal length F2 of the second lens of the optical lens satisfy the following condition: 0.5≤|F1 / F2|≤2.

[0061] Furthermore, the focal length F2 of the second lens of the optical lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.5≤|F2 / F|≤4.

[0062] Furthermore, the sagitta SAG31 of the object side of the third lens of the optical lens and the sagitta SAG32 of the image side of the third lens of the optical lens satisfy the following condition: 0.5≤|SAG32 / SAG31|.

[0063] Furthermore, the sagitta SAG51 of the object side of the fifth lens of the optical lens and the sagitta SAG52 of the image side of the fifth lens of the optical lens satisfy the following condition: 0.5≤|SAG51 / SAG52|.

[0064] Furthermore, the central radius of curvature R8 of the object side of the fourth lens of the optical lens and the central radius of curvature R9 of the image side of the fourth lens of the optical lens satisfy the following condition: 0.2≤|R8 / R9|≤2.8.

[0065] Furthermore, the focal length F4 of the fourth lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: |F4 / F|≤3.5.

[0066] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the image side of the fifth lens of the optical lens to the center of the imaging plane of the optical lens on the optical axis, satisfies the following condition: 0.15 ≤ BFL / TTL.

[0067] 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.

[0068] According to the technical solution of this invention, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially along the optical axis from the object side to the image side. The first lens has positive optical power, the object side of the first lens is convex, and the image side of the first lens is concave. The second lens has negative optical power, the object side of the second lens is convex, and the image side of the second lens is concave. The third lens has optical power, the object side of the third lens is concave, and the image side of the third lens is convex. The fourth lens has positive optical power, and at least one of the object side and the image side of the fourth lens is convex. The fifth lens has optical power.

[0069] The first lens has positive optical power and a short focal length. Its object-side surface is convex, and its image-side surface is concave. This design facilitates the collection of a wide field of view of light into the subsequent optical system, fixing the direction of large-angle light rays at the edges and achieving higher energy collection. Simultaneously, the positive optical power and the preferred use of a high-refractive-index material in the first lens allow for a smaller front aperture, reducing aberrations and distortion, thus achieving even higher energy collection. Designing the object-side surface of the first lens as convex facilitates the sliding of water droplets in practical applications, further enhancing energy collection.

[0070] The second lens has negative optical power, which facilitates the smooth entry of light into the rear optical system. The object-side surface of the second lens is convex, and the image-side surface is concave. The second lens has a concave meniscus shape with a low degree of curvature, which helps control the direction of large-angle light rays passing through the edge of the first lens, achieving a smooth transition of light, reducing size, and contributing to the miniaturization and low cost of optical lenses.

[0071] The third lens has optical power, a concave object-side surface, and a convex image-side surface. This makes the third lens a mirror with the image-side convex towards the image side, which is beneficial for converging light rays entering the third lens after passing through the second lens. This allows the light rays to smoothly transition into the rear optical system, facilitating a reduction in the front aperture and ensuring miniaturization. Simultaneously, the third lens preferably uses a high refractive index material, which helps the optical system achieve higher energy collection. The third lens can have either positive or negative optical power. When it has positive optical power, it helps converge the light rays entering from the second lens, ensuring a smooth transition into the rear optical system, further contributing to a smaller front aperture. When it has negative optical power, it helps transmit the light rays entering the third lens after passing through the second lens, ensuring a smooth transition.

[0072] The fourth lens has positive optical power. At least one of the object side and image side of the fourth lens is convex, which is beneficial for converging the light rays entering through the third lens, making the light rays transition smoothly and enter the rear optical system smoothly, which is conducive to reducing the rear aperture. At the same time, the fourth lens preferably uses a high refractive index material, which is beneficial for the optical system to achieve higher energy collection.

[0073] The fifth lens has optical power, which is beneficial for light convergence. It helps the fifth lens collect light rays that have passed through the fourth lens, and also allows the light rays to smoothly transition into the subsequent optical system. The fifth lens can have either positive or negative optical power. When the fifth lens has positive optical power, it facilitates a smoother transition of light rays entering from the fourth lens, enabling the collection of higher energy. When the fifth lens has negative optical power, it allows for a smaller rear aperture of the optical lens, reducing its size and facilitating miniaturization and cost reduction.

[0074] Furthermore, the optical lens of this application has a large entrance pupil diameter and a small FNO, enabling higher energy collection. Simultaneously, the uniform size of each lens makes the overall optical lens more compact, facilitating miniaturization. The optical lens of this application also boasts advantages such as a long back focal length and low distortion, facilitating assembly while ensuring imaging stability and quality. Additionally, the optical lens of this application exhibits low sensitivity. Attached Figure Description

[0075] 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:

[0076] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0077] Figure 2A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0078] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0079] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0080] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0081] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0082] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0083] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown;

[0084] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0085] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown.

[0086] The above figures include the following reference numerals:

[0087] L1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; STO, Aperture stop; L2, Second lens; S4, Object-side surface of the second lens; S5, Image-side surface of the second lens; L3, Third lens; S6, Object-side surface of the third lens; S7, Image-side surface of the third lens; L4, Fourth lens; S8, Object-side surface of the fourth lens; S9, Image-side surface of the fourth lens; L5, Fifth lens; S10, Object-side surface of the fifth lens; S11, Image-side surface of the fifth lens; L6, Filter; S12, Object-side surface of the filter; S13, Image-side surface of the filter; L7, Protective glass; S14, Object-side surface of the protective glass; S15, Image-side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0094] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as an automotive lens. In this case, the left side is the object side, and the right side is the image side; light rays from the object side can be imaged on the image side. In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a projection lens or a lidar transmitter lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side. The image side of the optical lens is the image source surface of the optical lens.

[0095] To address the challenge of simultaneously achieving miniaturization and high energy harvesting in existing optical lenses, this invention provides an optical lens and an electronic device.

[0096] Example 1

[0097] like Figures 1 to 10 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially from the object side to the image side along the optical axis. The first lens has positive optical power, its object side is convex, and its image side is concave. The second lens has negative optical power, its object side is convex, and its image side is concave. The third lens has optical power, its object side is concave, and its image side is convex. The fourth lens has positive optical power, and at least one of its object side and image side is convex. The fifth lens has optical power.

[0098] The first lens has positive optical power and a short focal length. Its object-side surface is convex, and its image-side surface is concave. This design facilitates the collection of a wide field of view of light into the subsequent optical system, fixing the direction of large-angle light rays at the edges and achieving higher energy collection. Simultaneously, the positive optical power and the preferred use of a high-refractive-index material in the first lens allow for a smaller front aperture, reducing aberrations and distortion, thus achieving even higher energy collection. Designing the object-side surface of the first lens as convex facilitates the sliding of water droplets in practical applications, further enhancing energy collection.

[0099] The second lens has negative optical power, which facilitates the smooth entry of light into the rear optical system. The object-side surface of the second lens is convex, and the image-side surface is concave. The second lens has a concave meniscus shape with a low degree of curvature, which helps control the direction of large-angle light rays passing through the edge of the first lens, achieving a smooth transition of light, reducing size, and contributing to the miniaturization and low cost of optical lenses.

[0100] The third lens has optical power, a concave object-side surface, and a convex image-side surface. This makes the third lens a mirror with the image-side convex towards the image side, which is beneficial for converging light rays entering the third lens after passing through the second lens. This allows the light rays to smoothly transition into the rear optical system, facilitating a reduction in the front aperture and ensuring miniaturization. Simultaneously, the third lens preferably uses a high refractive index material, which helps the optical system achieve higher energy collection. The third lens can have either positive or negative optical power. When it has positive optical power, it helps converge the light rays entering from the second lens, ensuring a smooth transition into the rear optical system, further contributing to a smaller front aperture. When it has negative optical power, it helps transmit the light rays entering the third lens after passing through the second lens, ensuring a smooth transition.

[0101] The fourth lens has positive optical power. At least one of the object side and image side of the fourth lens is convex, which is beneficial for converging the light rays entering through the third lens, making the light rays transition smoothly and enter the rear optical system smoothly, which is conducive to reducing the rear aperture. At the same time, the fourth lens preferably uses a high refractive index material, which is beneficial for the optical system to achieve higher energy collection.

[0102] The fifth lens has optical power, which is beneficial for light convergence. It helps the fifth lens collect light rays that have passed through the fourth lens, and also allows the light rays to smoothly transition into the subsequent optical system. The fifth lens can have either positive or negative optical power. When the fifth lens has positive optical power, it facilitates a smoother transition of light rays entering from the fourth lens, enabling the collection of higher energy. When the fifth lens has negative optical power, it allows for a smaller rear aperture of the optical lens, reducing its size and facilitating miniaturization and cost reduction.

[0103] Furthermore, the optical lens of this application has a large entrance pupil diameter and a small FNO, enabling higher energy collection. Simultaneously, the uniform size of each lens makes the overall optical lens more compact, facilitating miniaturization. The optical lens of this application also boasts advantages such as a long back focal length and low distortion, facilitating assembly while ensuring imaging stability and quality. Additionally, the optical lens of this application exhibits low sensitivity.

[0104] It should be noted that the optical lens of this application can be a vehicle-mounted radar optical lens, which has the advantages of miniaturization and can achieve high energy harvesting and other characteristics of low-distortion vehicle-mounted radar optical lenses, for detecting farther distances and accurately identifying environmental details.

[0105] In this embodiment, both the object-side and image-side surfaces of the fourth lens are convex. The fourth lens has a positive focal length, which facilitates light convergence. Its biconvex shape and gentle curve allow diverging light rays to smoothly enter the rear, further smoothing the light path. Preferably, the fourth lens is made of a high-refractive-index material, which helps the optical system achieve higher energy collection.

[0106] In this embodiment, the object-side surface of the fourth lens is convex, and the image-side surface is concave. The fourth lens has a positive focal length, and the concave image-side surface facilitates the convergence of light rays entering through the third lens, ensuring a smooth transition of light rays and their successful entry into the rear optical system. This also helps reduce the rear aperture and ensures miniaturization.

[0107] In this embodiment, the fifth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave. This configuration helps to reduce the rear aperture of the optical lens, thereby reducing its size and facilitating miniaturization and cost reduction. The fifth lens also has a special shape, close to a concentric circle, which allows light to transition smoothly to the rear optical system, improving image formation.

[0108] In this embodiment, the fifth lens has positive optical power, its object-side surface is convex, and its image-side surface is concave. This arrangement facilitates a smooth transition of light rays passing through the fourth lens, enabling higher energy collection. It also helps reduce the rear aperture of the optical lens, decreasing its size and promoting miniaturization and cost reduction. The fifth lens employs a special lens shape, nearly concentric, which allows for a smooth transition of light rays to the rear optical system, improving image formation.

[0109] In this embodiment, the fifth lens has negative optical power, its object-side surface is concave, and its image-side surface is convex. This configuration facilitates a smoother transition of light passing through the fourth lens, enabling higher energy collection, and also helps to reduce the angle at which light enters the detector, thus reducing the principal ray angle.

[0110] In this embodiment, the second lens is an aspherical lens. This configuration is beneficial for correcting field curvature and for enabling the optical lens to collect higher energy.

[0111] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the first lens and the second lens. This facilitates the effective focusing of light entering the optical system, reduces the lens aperture of the optical system, and makes the entire optical system smaller and more compact, which is beneficial for miniaturization and the realization of small CRAs. The position of the aperture stop disclosed in this application is merely an example and not a limitation. In alternative embodiments, the aperture stop can also be placed in other positions as needed.

[0112] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens to the imaging plane of the optical lens along the optical axis, satisfies the condition TTL / F ≤ 3 with respect to the total focal length F of the optical lens. Satisfying this condition makes the optical lens more compact, which is beneficial for miniaturization. Preferably, TTL / F ≤ 2.5.

[0113] In this embodiment, the focal length F1 of the first lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: 0 ≤ F1 / F ≤ 3. The first lens has a positive focal length and a short focal length, which helps to collect light, allowing as much light as possible to enter the optical lens, thus reducing aberrations and achieving higher energy collection. Preferably, 0.8 ≤ F1 / F ≤ 2.5.

[0114] In this embodiment, the total 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 condition: |((H / 2) / (F*TAN(FOV / 2))-1|≤0.1. Satisfying this condition ensures low distortion and helps improve image quality. Preferably, |((H / 2) / (F*TAN(FOV / 2))-1|≤0.08.

[0115] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the condition: D / H / FOV ≤ 0.07. Satisfying this condition ensures a small front aperture of the optical lens, which is beneficial for miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0116] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: 1 ≤ D / H / TAN(FOV) ≤ 6. Satisfying this condition ensures a small front aperture of the optical lens, which is beneficial for miniaturization. Preferably, 1.5 ≤ D / H / TAN(FOV) ≤ 4.

[0117] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens to the imaging plane of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.5. Satisfying this condition makes the optical lens more compact, which is beneficial for miniaturization. Preferably, TTL / H / FOV ≤ 0.1.

[0118] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side surface of the first lens to the imaging surface of the optical lens along the optical axis, satisfies the condition that TTL / DMAX ≤ 6 between the maximum half-aperture of the object-side surface of the first lens and the maximum half-aperture of the image-side surface of the fifth lens. By reasonably constraining TTL / DMAX, the entire optical system becomes more compact and smaller. Preferably, TTL / DMAX ≤ 5.

[0119] In this embodiment, the entrance pupil diameter EPD of the optical lens and the maximum value DMAX among the maximum half-aperture of the object-side surface of the first lens and the maximum half-aperture of the image-side surface of the fifth lens satisfy the condition: 1.2 ≤ EPD / DMAX. By reasonably constraining EPD / DMAX, the overall aperture of the optical system is small, the lens size of the optical lens is uniform, and the entire system is more compact, which is beneficial for miniaturization. Preferably, 1.3 ≤ EPD / DMAX.

[0120] In this embodiment, the total focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the condition: F / EPD≤2. Satisfying this condition ensures a large entrance pupil diameter and a small FNO, which is beneficial for increasing the amount of light transmitted. Preferably, F / EPD≤1.8.

[0121] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the condition: D / H / F ≤ 0.15. Satisfying this condition, under the condition of a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.1.

[0122] In this embodiment, the center thickness d3 of the third lens, the air gap distance d34 between the third and fourth lenses, the center thickness d4 of the fourth lens, the air gap distance d45 between the fourth and fifth lenses, and the center thickness d5 of the fifth lens satisfy the condition: (d3+d34+d4+d45+d5) / (d3+d4+d5)≤2. Satisfying this condition ensures that the distances between the third and fourth lenses, and between the fourth and fifth lenses, are very close, and guarantees that the sizes of the third, fourth, and fifth lenses are uniform, resulting in a more compact optical lens. Preferably, (d3+d34+d4+d45+d5) / (d3+d4+d5)≤1.5.

[0123] In this embodiment, the central radius of curvature R6 of the object-side surface of the third lens of the optical lens and the central radius of curvature R7 of the image-side surface of the third lens of the optical lens satisfy the condition: 0 ≤ R6 / R7 ≤ 2.5. Satisfying this condition makes the object-side and image-side surfaces of the third lens have similar shapes, smoothly transitioning peripheral light and helping to reduce lens sensitivity. Preferably, 0.4 ≤ R6 / R7 ≤ 2.

[0124] In this embodiment, the central radius of curvature R10 of the object-side surface of the fifth lens of the optical lens and the central radius of curvature R11 of the image-side surface of the fifth lens of the optical lens satisfy the condition: 0 ≤ R10 / R11 ≤ 2. Satisfying this condition makes the shape of the fifth lens approximately concentric circles, which is beneficial for a smooth transition of light rays and achieves higher energy collection. Preferably, 0.4 ≤ R10 / R11 ≤ 1.5.

[0125] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: 0.5 ≤ |F1 / F2| ≤ 2. Satisfying this condition ensures that the focal lengths of the first and second lenses are similar, which helps light to smoothly transition into the second lens, reduces system sensitivity, and facilitates higher energy harvesting. Preferably, 0.6 ≤ |F1 / F2| ≤ 1.5.

[0126] In this embodiment, the focal length F2 of the second lens of the optical lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.5 ≤ |F2 / F| ≤ 4. Satisfying this condition ensures that the second lens has a short focal length, which is beneficial for controlling the light path between the first and third lenses, reducing aberrations caused by large-angle light rays entering through the first lens, and making the lens structure more compact, thus facilitating miniaturization. Preferably, 0.7 ≤ |F2 / F| ≤ 3.

[0127] In this embodiment, the sagitta of the object-side surface of the third lens of the optical lens, SAG31, and the sagitta of the image-side surface of the third lens of the optical lens, SAG32, satisfy the condition: 0.5 ≤ |SAG32 / SAG31|. Satisfying this condition results in a more curved image-side surface and a flatter object-side surface of the third lens, which is beneficial for compressing light, achieving a small FNO, and reducing the system aperture. Preferably, 0.8 ≤ |SAG32 / SAG31|.

[0128] In this embodiment, the sagitta of the object-side surface SAG51 of the fifth lens of the optical lens and the sagitta of the image-side surface SAG52 of the fifth lens of the optical lens satisfy the condition: 0.5 ≤ |SAG51 / SAG52|. Satisfying this condition makes the object-side surface of the fifth lens more curved and the image-side surface more gentle, which is beneficial for compressing light, achieving a small FNO, and reducing the system aperture. Preferably, 0.8 ≤ |SAG51 / SAG52|.

[0129] In this embodiment, the central radius of curvature R8 of the object-side surface of the fourth lens of the optical lens and the central radius of curvature R9 of the image-side surface of the fourth lens of the optical lens satisfy the condition: 0.2 ≤ |R8 / R9| ≤ 2.8. Satisfying this condition makes the object-side and image-side surfaces of the fourth lens have similar shapes, smoothly transitioning peripheral light and helping to reduce lens sensitivity. Preferably, 0.2 ≤ |R8 / R9| ≤ 2.6.

[0130] In this embodiment, the focal length F4 of the fourth lens of the optical lens satisfies the condition |F4 / F|≤3.5 with the total focal length F of the optical lens. Satisfying this condition ensures a short focal length for the fourth lens, which is beneficial for controlling the light path between the third and fifth lenses, reducing aberrations caused by large-angle light rays entering through the third lens, and making the optical lens structure more compact, thus facilitating miniaturization. Preferably, |F4 / F|≤3.

[0131] In this embodiment, the optical back focal length (BFL), i.e., the distance along the optical axis from the center of the image-side surface of the fifth lens to the center of the imaging plane of the optical lens, satisfies the condition that the total optical length of the optical lens (TTL), i.e., the distance along the optical axis from the object-side surface of the first lens to the imaging plane of the optical lens, is 0.15 ≤ BFL / TTL. Satisfying this condition ensures the back focal length, which is beneficial for the assembly of the optical lens. Preferably, 0.2 ≤ BFL / TTL.

[0132] Example 2

[0133] like Figures 1 to 10 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens sequentially from the object side to the image side along the optical axis. The first lens has positive optical power; the second lens has negative optical power; the third lens has optical power; the fourth lens has positive optical power; and the fifth lens has optical power. The total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens to the imaging plane of the optical lens on the optical axis, satisfies the following relationship with the total focal length F of the optical lens: TTL / F≤3.

[0134] The first lens has positive optical power and a short focal length, which is beneficial for collecting a large field of view of light into the rear optical system, fixing the direction of large-angle light rays at the edges, and achieving higher energy collection. Simultaneously, the first lens has positive optical power and is preferably made of a high-refractive-index material, which helps to reduce the front aperture, reduce aberrations, reduce distortion, and achieve even higher energy collection.

[0135] The second lens has negative optical power, which facilitates the smooth entry of light into the rear optical system.

[0136] The third lens has optical power, which helps to converge the light rays entering the third lens after passing through the second lens, ensuring a smooth transition of the light rays into the rear optical system. This also facilitates a reduction in the front aperture, ensuring miniaturization. Simultaneously, the third lens preferably uses a high refractive index material, which helps the optical system achieve higher energy collection. The third lens can have either positive or negative optical power. When the third lens has positive optical power, it helps to converge the light rays entering from the second lens, ensuring a smooth transition of the light rays into the rear optical system, further contributing to a smaller front aperture. When the third lens has negative optical power, it helps to transmit the light rays entering the third lens after passing through the second lens, ensuring a smooth transition of the light rays.

[0137] The fourth lens has positive optical power, which is beneficial for converging the light entering through the third lens, making the light path transition smoothly and entering the rear optical system smoothly, which is conducive to reducing the rear aperture; at the same time, the fourth lens preferably uses a high refractive index material, which is beneficial for the optical system to achieve higher energy collection.

[0138] The fifth lens has optical power, which is beneficial for light convergence. It helps the fifth lens collect light rays that have passed through the fourth lens, and also allows the light rays to smoothly transition into the subsequent optical system. The fifth lens can have either positive or negative optical power. When the fifth lens has positive optical power, it facilitates a smoother transition of light rays entering from the fourth lens, enabling the collection of higher energy. When the fifth lens has negative optical power, it allows for a smaller rear aperture of the optical lens, reducing its size and facilitating miniaturization and cost reduction.

[0139] By constraining the total optical length of the optical lens—that is, the ratio between the distance TTL from the object side of the first lens to the imaging plane of the optical lens along the optical axis and the total focal length F of the optical lens—within a reasonable range, the optical lens becomes more compact, which is beneficial for miniaturization. Preferably, TTL / F ≤ 2.5.

[0140] Furthermore, the optical lens of this application has a large entrance pupil diameter and a small FNO, enabling higher energy collection. Simultaneously, the uniform size of each lens makes the overall optical lens more compact, facilitating miniaturization. The optical lens of this application also boasts advantages such as a long back focal length and low distortion, facilitating assembly while ensuring imaging stability and quality. Additionally, the optical lens of this application exhibits low sensitivity.

[0141] It should be noted that the optical lens of this application can be a vehicle-mounted radar optical lens, which has the advantages of miniaturization and can achieve high energy harvesting and other characteristics of low-distortion vehicle-mounted radar optical lenses, for detecting farther distances and accurately identifying environmental details.

[0142] In this embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave. Designing the object-side surface of the first lens as convex facilitates the sliding of water droplets in practical applications, thereby achieving higher energy collection.

[0143] In this embodiment, the object-side surface of the second lens is convex, and the image-side surface is concave. The second lens has a concave meniscus shape with a low degree of curvature, which helps to control the direction of large-angle light rays passing through the edge of the first lens, achieving a smooth transition of light rays, reducing volume, and facilitating the miniaturization and low cost of optical lenses.

[0144] In this embodiment, the object-side surface of the third lens is concave, and the image-side surface is convex. This makes the third lens a mirror with the image-side convex towards the image side, which is beneficial for converging the light rays entering the third lens after passing through the second lens, allowing the light rays to smoothly transition into the rear optical system. This also helps to reduce the front aperture and ensure miniaturization. At the same time, the third lens preferably uses a high refractive index material, which is beneficial for the optical system to achieve higher energy collection.

[0145] In this embodiment, both the object-side and image-side surfaces of the fourth lens are convex. The fourth lens has a positive focal length, which facilitates light convergence. Its biconvex shape and gentle curve allow diverging light rays to smoothly enter the rear, further smoothing the light path. Preferably, the fourth lens is made of a high-refractive-index material, which helps the optical system achieve higher energy collection.

[0146] In this embodiment, the object-side surface of the fourth lens is convex, and the image-side surface is concave. The fourth lens has a positive focal length, and the concave image-side surface facilitates the convergence of light rays entering through the third lens, ensuring a smooth transition of light rays and their successful entry into the rear optical system. This also helps reduce the rear aperture and ensures miniaturization.

[0147] In this embodiment, the fifth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave. This configuration helps to reduce the rear aperture of the optical lens, thereby reducing its size and facilitating miniaturization and cost reduction. The fifth lens also has a special shape, close to a concentric circle, which allows light to transition smoothly to the rear optical system, improving image formation.

[0148] In this embodiment, the fifth lens has positive optical power, its object-side surface is convex, and its image-side surface is concave. This arrangement facilitates a smooth transition of light rays passing through the fourth lens, enabling higher energy collection. It also helps reduce the rear aperture of the optical lens, decreasing its size and promoting miniaturization and cost reduction. The fifth lens employs a special lens shape, nearly concentric, which allows for a smooth transition of light rays to the rear optical system, improving image formation.

[0149] In this embodiment, the fifth lens has negative optical power, its object-side surface is concave, and its image-side surface is convex. This configuration facilitates a smoother transition of light passing through the fourth lens, enabling higher energy collection, and also helps to reduce the angle at which light enters the detector, thus reducing the principal ray angle.

[0150] In this embodiment, the second lens is an aspherical lens. This configuration is beneficial for correcting field curvature and for enabling the optical lens to collect higher energy.

[0151] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the first lens and the second lens. This facilitates the effective focusing of light entering the optical system, reduces the lens aperture of the optical system, and makes the entire optical system smaller and more compact, which is beneficial for miniaturization and the realization of small CRAs. The position of the aperture stop disclosed in this application is merely an example and not a limitation. In alternative embodiments, the aperture stop can also be placed in other positions as needed.

[0152] In this embodiment, the focal length F1 of the first lens of the optical lens satisfies the following relationship with the total focal length F of the optical lens: 0 ≤ F1 / F ≤ 3. The first lens has a positive focal length and a short focal length, which helps to collect light, allowing as much light as possible to enter the optical lens, thus reducing aberrations and achieving higher energy collection. Preferably, 0.8 ≤ F1 / F ≤ 2.5.

[0153] In this embodiment, the total 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 condition: |((H / 2) / (F*TAN(FOV / 2))-1|≤0.1. Satisfying this condition ensures low distortion and helps improve image quality. Preferably, |((H / 2) / (F*TAN(FOV / 2))-1|≤0.08.

[0154] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the condition: D / H / FOV ≤ 0.07. Satisfying this condition ensures a small front aperture of the optical lens, which is beneficial for miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0155] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view (FOV) of the optical lens satisfy the following condition: 1 ≤ D / H / TAN(FOV) ≤ 6. Satisfying this condition ensures a small front aperture of the optical lens, which is beneficial for miniaturization. Preferably, 1.5 ≤ D / H / TAN(FOV) ≤ 4.

[0156] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object side of the first lens to the imaging plane of the optical lens on the optical axis, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.5. Satisfying this condition makes the optical lens more compact, which is beneficial for miniaturization. Preferably, TTL / H / FOV ≤ 0.1.

[0157] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the object-side surface of the first lens to the imaging surface of the optical lens along the optical axis, satisfies the condition that TTL / DMAX ≤ 6 between the maximum half-aperture of the object-side surface of the first lens and the maximum half-aperture of the image-side surface of the fifth lens. By reasonably constraining TTL / DMAX, the entire optical system becomes more compact and smaller. Preferably, TTL / DMAX ≤ 5.

[0158] In this embodiment, the entrance pupil diameter EPD of the optical lens and the maximum value DMAX among the maximum half-aperture of the object-side surface of the first lens and the maximum half-aperture of the image-side surface of the fifth lens satisfy the condition: 1.2 ≤ EPD / DMAX. By reasonably constraining EPD / DMAX, the overall aperture of the optical system is small, the lens size of the optical lens is uniform, and the entire system is more compact, which is beneficial for miniaturization. Preferably, 1.3 ≤ EPD / DMAX.

[0159] In this embodiment, the total focal length F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy the condition: F / EPD≤2. Satisfying this condition ensures a large entrance pupil diameter and a small FNO, which is beneficial for increasing the amount of light transmitted. Preferably, F / EPD≤1.8.

[0160] In this embodiment, the maximum aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the condition: D / H / F ≤ 0.15. Satisfying this condition, under the condition of a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.1.

[0161] In this embodiment, the center thickness d3 of the third lens, the air gap distance d34 between the third and fourth lenses, the center thickness d4 of the fourth lens, the air gap distance d45 between the fourth and fifth lenses, and the center thickness d5 of the fifth lens satisfy the condition: (d3+d34+d4+d45+d5) / (d3+d4+d5)≤2. Satisfying this condition ensures that the distances between the third and fourth lenses, and between the fourth and fifth lenses, are very close, and guarantees that the sizes of the third, fourth, and fifth lenses are uniform, resulting in a more compact optical lens. Preferably, (d3+d34+d4+d45+d5) / (d3+d4+d5)≤1.5.

[0162] In this embodiment, the central radius of curvature R6 of the object-side surface of the third lens of the optical lens and the central radius of curvature R7 of the image-side surface of the third lens of the optical lens satisfy the condition: 0 ≤ R6 / R7 ≤ 2.5. Satisfying this condition makes the object-side and image-side surfaces of the third lens have similar shapes, smoothly transitioning peripheral light and helping to reduce lens sensitivity. Preferably, 0.4 ≤ R6 / R7 ≤ 2.

[0163] In this embodiment, the central radius of curvature R10 of the object-side surface of the fifth lens of the optical lens and the central radius of curvature R11 of the image-side surface of the fifth lens of the optical lens satisfy the condition: 0 ≤ R10 / R11 ≤ 2. Satisfying this condition makes the shape of the fifth lens approximately concentric circles, which is beneficial for a smooth transition of light rays and achieves higher energy collection. Preferably, 0.4 ≤ R10 / R11 ≤ 1.5.

[0164] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: 0.5 ≤ |F1 / F2| ≤ 2. Satisfying this condition ensures that the focal lengths of the first and second lenses are similar, which helps light to smoothly transition into the second lens, reduces system sensitivity, and facilitates higher energy harvesting. Preferably, 0.6 ≤ |F1 / F2| ≤ 1.5.

[0165] In this embodiment, the focal length F2 of the second lens of the optical lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.5 ≤ |F2 / F| ≤ 4. Satisfying this condition ensures that the second lens has a short focal length, which is beneficial for controlling the light path between the first and third lenses, reducing aberrations caused by large-angle light rays entering through the first lens, and making the lens structure more compact, thus facilitating miniaturization. Preferably, 0.7 ≤ |F2 / F| ≤ 3.

[0166] In this embodiment, the sagitta of the object-side surface of the third lens of the optical lens, SAG31, and the sagitta of the image-side surface of the third lens of the optical lens, SAG32, satisfy the condition: 0.5 ≤ |SAG32 / SAG31|. Satisfying this condition results in a more curved image-side surface and a flatter object-side surface of the third lens, which is beneficial for compressing light, achieving a small FNO, and reducing the system aperture. Preferably, 0.8 ≤ |SAG32 / SAG31|.

[0167] In this embodiment, the sagitta of the object-side surface SAG51 of the fifth lens of the optical lens and the sagitta of the image-side surface SAG52 of the fifth lens of the optical lens satisfy the condition: 0.5 ≤ |SAG51 / SAG52|. Satisfying this condition makes the object-side surface of the fifth lens more curved and the image-side surface more gentle, which is beneficial for compressing light, achieving a small FNO, and reducing the system aperture. Preferably, 0.8 ≤ |SAG51 / SAG52|.

[0168] In this embodiment, the central radius of curvature R8 of the object-side surface of the fourth lens of the optical lens and the central radius of curvature R9 of the image-side surface of the fourth lens of the optical lens satisfy the condition: 0.2 ≤ |R8 / R9| ≤ 2.8. Satisfying this condition makes the object-side and image-side surfaces of the fourth lens have similar shapes, smoothly transitioning peripheral light and helping to reduce lens sensitivity. Preferably, 0.2 ≤ |R8 / R9| ≤ 2.6.

[0169] In this embodiment, the focal length F4 of the fourth lens of the optical lens satisfies the condition |F4 / F|≤3.5 with the total focal length F of the optical lens. Satisfying this condition ensures a short focal length for the fourth lens, which is beneficial for controlling the light path between the third and fifth lenses, reducing aberrations caused by large-angle light rays entering through the third lens, and making the optical lens structure more compact, thus facilitating miniaturization. Preferably, |F4 / F|≤3.

[0170] In this embodiment, the optical back focal length (BFL), i.e., the distance along the optical axis from the center of the image-side surface of the fifth lens to the center of the imaging plane of the optical lens, satisfies the condition that the total optical length of the optical lens (TTL), i.e., the distance along the optical axis from the object-side surface of the first lens to the imaging plane of the optical lens, is 0.15 ≤ BFL / TTL. Satisfying this condition ensures the back focal length, which is beneficial for the assembly of the optical lens. Preferably, 0.2 ≤ BFL / TTL.

[0171] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0172] The optical lens in this application may employ multiple lens elements, such as the five elements described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0173] In an exemplary embodiment, the first, second, third, fourth, and fifth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, the first to sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to fifth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to fifth lenses in the optical lens can also be made of a combination of plastic and glass.

[0174] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0175] 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 five lenses are described as an example in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0176] 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.

[0177] It should be noted that any of the examples one through ten below are applicable to all embodiments of this application.

[0178] Example 1

[0179] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0180] like Figure 1 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0181] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0182] In this example, the total effective focal length F of the optical lens is 32.718mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 56.933mm.

[0183] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0184] Table 1

[0185]

[0186]

[0187] In Example 1, the object-side surface and image-side surface of any one of the lenses from the first lens L1 to the fifth lens L5 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0188]

[0189] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, E, F, and G are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, and E that can be used for the aspherical lens surfaces S4 and S5 in Example 1.

[0190] Table 2

[0191] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 -1.889E+00 -7.511E-05 -9.288E-07 8.566E-09 -3.247E-11 6.757E-14 5 -1.543E+00 -3.923E-05 -6.516E-07 8.396E-09 -4.882E-11 1.361E-13

[0192] Example 2

[0193] like Figure 2The image shows an optical lens of Example 2 of this application. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples. Figure 2 A schematic diagram of the optical lens structure of Example 2 is shown.

[0194] like Figure 2 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0195] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0196] In this example, the total effective focal length F of the optical lens is 32.511mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 57.389mm.

[0197] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0198] Table 3

[0199] Surf Radius Thickness Nd Vd 1 24.380 5.834 1.50 49.60 2 180.275 0.168 STO Infinity 3.610 4 21.193 3.120 1.40 61.20 5 10.702 7.206 6 -24.957 6.423 1.70 23.80 7 -22.310 0.100 8 57.698 6.595 1.70 23.80 9 -56.920 0.100 10 19.685 6.899 1.80 46.60 11 15.857 7.511 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0200] Table 4 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 2.

[0201] Table 4

[0202] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 -5.403E+00 -8.107E-05 -7.239E-07 9.043E-09 -3.706E-11 4.534E-14 5 -1.843E+00 -4.711E-05 -5.340E-07 9.076E-09 -4.861E-11 9.504E-14

[0203] Example 3

[0204] like Figure 3 As shown, an optical lens of Example 3 of this application is described. Figure 3 A schematic diagram of the optical lens structure of Example 3 is shown.

[0205] like Figure 3 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0206] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 has negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0207] In this example, the total effective focal length F of the optical lens is 32.667mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 57.647mm.

[0208] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0209] Table 5

[0210] Surf Radius Thickness Nd Vd 1 24.242 6.165 1.50 49.60 2 84.449 1.042 STO Infinity 2.901 4 28.102 2.686 1.40 61.20 5 14.445 6.569 6 -34.676 7.873 1.70 23.80 7 -20.180 0.100 8 34.060 7.307 1.70 23.80 9 70.000 0.100 10 21.414 7.041 1.80 46.60 11 17.368 6.039 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0211] Table 6 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 3.

[0212] Table 6

[0213] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 6.056E+00 -1.509E-04 -7.024E-07 5.147E-09 2.311E-12 -3.895E-13 5 -9.876E-01 -7.985E-05 -3.217E-07 4.823E-09 -8.642E-12 -2.822E-14

[0214] Example 4

[0215] like Figure 4 As shown, the optical lens of Example 4 of this application is described. Figure 4 A schematic diagram of the optical lens structure of Example 4 is shown.

[0216] like Figure 4As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0217] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 has negative optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0218] In this example, the total effective focal length F of the optical lens is 32.513mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 57.999mm.

[0219] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0220] Table 7

[0221] Surf Radius Thickness Nd Vd 1 24.833 6.265 1.50 49.60 2 81.809 0.967 STO Infinity 2.776 4 28.408 2.786 1.40 61.20 5 15.325 6.522 6 -34.224 7.973 1.70 23.80 7 -20.324 0.100 8 34.160 7.407 1.70 23.80 9 70.100 0.100 10 21.495 7.141 1.80 46.60 11 17.399 6.139 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0222] Table 8 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 4.

[0223] Table 8

[0224] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 1.404E+00 -1.330E-04 -1.064E-07 9.185E-10 -2.321E-11 3.001E-13 5 -7.271E-01 -7.648E-05 -6.779E-07 7.009E-09 2.146E-11 -2.491E-13

[0225] Example 5

[0226] like Figure 5 As shown, an optical lens of Example 5 of this application is described. Figure 5 A schematic diagram of the optical lens structure of Example 5 is shown.

[0227] like Figure 5 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0228] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0229] In this example, the total effective focal length F of the optical lens is 32.462mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 58.528mm.

[0230] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0231] Table 9

[0232] Surf Radius Thickness Nd Vd 1 20.306 6.070 1.50 49.60 2 200.000 0.762 STO Infinity 3.145 4 23.617 3.503 1.40 61.20 5 11.340 9.143 6 -18.744 6.625 1.70 23.80 7 -19.881 0.100 8 78.000 7.302 1.70 23.80 9 -50.000 0.100 10 20.706 6.512 1.80 46.60 11 20.000 5.443 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0233] Table 10 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 5.

[0234] Table 10

[0235] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 2.313E+00 -1.026E-04 -5.440E-07 4.600E-09 -3.584E-11 5.346E-14 5 -3.301E-01 -2.330E-06 -3.184E-06 4.564E-08 -3.554E-10 1.028E-12

[0236] Example 6

[0237] like Figure 6 As shown, an optical lens of Example Six of this application is described. Figure 6 A schematic diagram of the optical lens structure of Example Six is ​​shown.

[0238] like Figure 6 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0239] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0240] In this example, the total effective focal length F of the optical lens is 32.657mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 57.925mm.

[0241] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0242] Table 11

[0243] Surf Radius Thickness Nd Vd 1 21.806 6.163 1.50 49.60 2 200.000 0.874 STO Infinity 3.248 4 21.594 3.584 1.40 61.20 5 11.429 9.171 6 -20.503 5.987 1.70 23.80 7 -21.316 0.100 8 77.772 7.115 1.70 23.80 9 -50.622 0.100 10 20.304 6.275 1.80 46.60 11 19.833 5.485 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0244] Table 12 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 6.

[0245] Table 12

[0246] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 1.600E+00 -9.419E-05 -7.436E-07 5.706E-09 -1.882E-11 -6.164E-14 5 -4.962E-01 -2.597E-05 -2.358E-06 3.421E-08 -2.589E-10 7.425E-13

[0247] Example 7

[0248] like Figure 7 As shown, an optical lens of Example Seven of this application is described. Figure 7 A schematic diagram of the optical lens structure of Example 7 is shown.

[0249] like Figure 7 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0250] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 has negative optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0251] In this example, the total effective focal length F of the optical lens is 32.377mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 58.589mm.

[0252] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0253] Table 13

[0254] Surf Radius Thickness Nd Vd 1 27.901 6.070 1.50 49.60 2 500.000 1.176 STO Infinity 1.624 4 17.598 3.503 1.40 61.20 5 10.259 7.219 6 -33.457 6.525 1.70 23.80 7 -21.253 0.100 8 24.457 6.835 1.70 23.80 9 80.000 2.600 10 -149.147 7.075 1.80 46.60 11 -200.000 6.039 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0255] Table 14 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 7.

[0256] Table 14

[0257] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 -1.879E+01 7.098E-05 -3.402E-06 4.827E-08 -3.689E-10 1.159E-12 5 -1.314E+00 -1.634E-04 6.446E-07 2.303E-09 -4.809E-11 1.997E-13

[0258] Example 8

[0259] like Figure 8 As shown, an optical lens of Example 8 of this application is described. Figure 8 A schematic diagram of the optical lens structure of Example 8 is shown.

[0260] like Figure 8 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0261] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has positive optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is concave. The fifth lens L5 has negative optical power, its object-side surface S10 is concave, and its image-side surface S11 is convex. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0262] In this example, the total effective focal length F of the optical lens is 32.501mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 58.362mm.

[0263] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0264] Table 15

[0265] Surf Radius Thickness Nd Vd 1 26.764 6.256 1.50 49.60 2 262.798 1.176 STO Infinity 1.624 4 17.598 3.573 1.40 61.20 5 10.259 7.219 6 -32.980 6.579 1.70 23.80 7 -21.140 0.100 8 24.457 7.012 1.70 23.80 9 80.000 2.400 10 -151.000 6.560 1.80 46.60 11 -200.000 6.039 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0266] Table 16 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 8.

[0267] Table 16

[0268] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 -1.729E+01 8.192E-05 -3.419E-06 4.795E-08 -3.692E-10 1.161E-12 5 -1.222E+00 -1.575E-04 6.181E-07 1.948E-09 -4.956E-11 2.147E-13

[0269] Example 9

[0270] like Figure 9 As shown, an optical lens of Example Nine of this application is described. Figure 9 A schematic diagram of the optical lens structure of Example 9 is shown.

[0271] like Figure 9 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0272] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has negative optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0273] In this example, the total effective focal length F of the optical lens is 33.481mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 56.756mm.

[0274] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0275] Table 17

[0276] Surf Radius Thickness Nd Vd 1 18.998 5.970 1.50 49.60 2 264.024 0.847 STO Infinity 1.145 4 22.821 3.403 1.40 61.20 5 10.311 9.143 6 -23.444 6.525 1.70 23.80 7 -28.857 0.100 8 90.000 6.052 1.70 23.80 9 -50.000 0.100 10 18.815 7.183 1.80 46.60 11 19.302 6.464 12 Infinity 2.000 1.52 64.10 13 Infinity 5.000 14 Infinity 0.500 1.46 67.80 15 Infinity 2.323 IMA Infinity

[0277] Table 18 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 9.

[0278] Table 18

[0279] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 1.257E+00 -1.812E-04 2.073E-07 1.166E-09 3.037E-11 -2.642E-13 5 -8.703E-01 -7.439E-05 -2.681E-06 5.843E-08 -4.223E-10 1.043E-12

[0280] Example 10

[0281] like Figure 10 As shown, an optical lens of Example 10 of this application is described. Figure 10 A schematic diagram of the optical lens structure of Example 10 is shown.

[0282] like Figure 10 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, aperture stop STO, second lens L2, third lens L3, fourth lens L4, fifth lens L5, filter L6, protective glass L7, and imaging surface IMA.

[0283] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S4 is convex, and its image-side surface S5 is concave. The third lens L3 has negative optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. Light from the object passes sequentially through surfaces S1 to S15 and is finally imaged onto the imaging plane IMA.

[0284] In this example, the total effective focal length F of the optical lens is 35.229mm, the maximum field of view (FOV) of the optical lens is 34.000°, and the total length (TTL) of the optical lens is 57.935mm.

[0285] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0286] Table 19

[0287]

[0288]

[0289] Table 20 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S4 and S5 in Example 10.

[0290] Table 20

[0291] Higher order terms / 4 6 8 10 12 Surf K A B C D E 4 9.128E-01 -1.569E-04 -1.459E-07 3.980E-10 5.304E-11 -3.819E-13 5 -8.592E-01 -7.288E-05 -2.558E-06 5.468E-08 -4.374E-10 1.250E-12

[0292] In summary, Examples 1 through 2 completely satisfy the relationships shown in Table 21.

[0293] Table 21

[0294]

[0295]

[0296] Tables 22 and 23 give the effective focal length F of the optical lenses for Examples 1 to 10, and the effective focal lengths of each lens from F1 to F5, etc. (unit: mm).

[0297] Table 22

[0298]

[0299]

[0300] Table 23

[0301] Parameters / Examples 6 7 8 9 10 TTL 57.925 58.589 58.362 56.756 57.935 F 32.657 32.377 32.501 33.481 35.229 FOV 34.000 34.000 34.000 34.000 34.000 F1 49.373 60.035 60.273 41.433 46.359 F2 -68.547 -72.267 -72.493 -51.789 -56.192 F3 404.276 70.998 71.256 -359.943 -378.589 F4 46.452 49.706 49.645 48.450 48.479 F5 224.916 -797.488 -835.578 127.256 151.787 DMAX 14.752 14.081 13.970 14.633 14.962 EPD 21.560 21.560 21.560 21.560 21.560 d3 5.987 6.525 6.579 6.525 6.825 d34 0.100 0.100 0.100 0.100 0.100 d4 7.115 6.835 7.012 6.052 6.252 d45 0.100 2.400 2.400 0.100 0.100 d5 6.275 7.075 6.560 7.183 7.383 D 23.222 23.786 23.776 22.908 23.142 H 19.496 19.440 19.444 19.298 19.942 R6 -20.503 -33.457 -32.980 -23.444 -24.387 R7 -21.316 -21.253 -21.140 -28.857 -30.000 R8 77.772 24.457 24.457 90.000 90.000 SAG31 -3.168 -1.956 -1.957 -2.510 -2.466 SAG32 -4.448 -4.299 -4.281 -3.050 -3.042 SAG51 5.594 -0.586 -0.568 6.902 7.077 SAG52 4.018 -0.401 -0.396 4.458 4.708 R9 -50.622 80.000 80.000 -50.000 -50.000 R10 20.304 -149.147 -151.000 18.815 19.232 R11 19.833 -200.000 -200.000 19.302 19.073 BFL 15.307 15.861 15.861 16.287 16.287

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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 is composed of five lenses with optical power, which are sequentially arranged along the optical axis from the object side to the image side as follows: a first lens having positive optical power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens having negative optical power, the object side surface of the second lens being convex, and the image side surface of the second lens being concave; a third lens having optical power, the object side surface of the third lens being concave, and the image side surface of the third lens being convex; a fourth lens having positive optical power, the object side surface of the fourth lens being convex; a fifth lens having optical power; the focal length value F1 of the first lens of the optical lens and the overall focal length value F of the optical lens satisfy: 0.8≤F1 / F≤2.5; the total optical length of the optical lens, i.e., the distance TTL on the optical axis from the object side surface of the first lens of the optical lens to the imaging surface of the optical lens, and the maximum value DMAX of the maximum light passing half aperture on the object side surface of the first lens and the maximum light passing half aperture on the image side surface of the fifth lens satisfy: 3.828≤TTL / DMAX≤5.

2. The optical lens of claim 1, wherein, The third lens has positive optical power.

3. The optical lens of claim 1, wherein, The third lens has negative optical power.

4. The optical lens of claim 1, wherein, The image side surface of the fourth lens is convex.

5. The optical lens of claim 1, wherein, The image side surface of the fourth lens is concave.

6. The optical lens of claim 1, wherein, The fifth lens has negative optical power, the object side surface of the fifth lens being convex, and the image side surface of the fifth lens being concave.

7. The optical lens of claim 1, wherein, The fifth lens has positive optical power, the object side surface of the fifth lens being convex, and the image side surface of the fifth lens being concave.

8. The optical lens of claim 1, wherein, The fifth lens has negative optical power, the object side surface of the fifth lens being concave, and the image side surface of the fifth lens being convex.

9. The optical lens of claim 1, wherein, The second lens is an aspheric lens.

10. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm arranged between the first lens and the second lens.

11. The optical lens of any of claims 1 to 10, wherein, The total optical length of the optical lens, i.e., the distance TTL on the optical axis from the object side surface of the first lens of the optical lens to the imaging surface of the optical lens, and the overall focal length value F of the optical lens satisfy: 1.645≤TTL / F≤2.

5.

12. The optical lens of any of claims 1 to 10, wherein, The overall focal length value F of the optical lens, the maximum field of view angle FOV of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: 0.016≤|((H / 2) / (F*TAN(FOV / 2))-1|≤0.

1.

13. The optical lens of any of claims 1 to 10, wherein, The maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: 0.034≤D / H / FOV≤0.

05.

14. The optical lens of any of claims 1 to 10, wherein, The maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: 1.5≤D / H / TAN(FOV)≤4.

15. The optical lens of any of claims 1 to 10, wherein, An optical total length of the optical lens, i.e., a distance TTL on the optical axis from an object side of the first lens of the optical lens to an imaging surface of the optical lens, an image height H corresponding to a maximum field of view angle of the optical lens, and a maximum field of view angle FOV of the optical lens satisfy: 0.085≤TTL / H / FOV≤0.

1.

16. The optical lens of any of claims 1 to 10, wherein, A maximum value DMAX of a maximum half light passing diameter of the object side of the first lens to a maximum half light passing diameter of the image side of the fifth lens, and an entrance pupil diameter EPD of the optical lens satisfy: 1.2≤EPD / DMAX≤1.

754.

17. The optical lens of any of claims 1 to 10, wherein, An entire group focal length value F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.502≤F / EPD≤1.

8.

18. The optical lens of any of claims 1 to 10, wherein, A maximum light passing diameter D of the object side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the entire group focal length value F of the optical lens satisfy: 0.033≤D / H / F≤0.

1.

19. The optical lens of any of claims 1 to 10, wherein, A center thickness d3 of the third lens, an air gap distance d34 between the third lens and the fourth lens, a center thickness d4 of the fourth lens, an air gap distance d45 between the fourth lens and the fifth lens, and a center thickness d5 of the fifth lens satisfy: 1.009≤(d3+d34+d4+d45+d5) / (d3+d4+d5)≤1.

5.

20. The optical lens of any of claims 1 to 10, wherein, A center curvature radius R6 of the object side of the third lens of the optical lens and a center curvature radius R7 of the image side of the third lens of the optical lens satisfy: 0.4≤R6 / R7≤2.

21. The optical lens of any of claims 1 to 10, wherein, A center curvature radius R10 of the object side of the fifth lens of the optical lens and a center curvature radius R11 of the image side of the fifth lens of the optical lens satisfy: 0.4≤R10 / R11≤1.

5.

22. The optical lens of any of claims 1 to 10, wherein, A focal length value F1 of the first lens of the optical lens and a focal length value F2 of the second lens of the optical lens satisfy: 0.6≤|F1 / F2|≤1.

5.

23. The optical lens of any of claims 1 to 10, wherein, The focal length value F2 of the second lens of the optical lens and an entire group focal length value F of the optical lens satisfy: 0.7≤|F2 / F|≤3.

24. The optical lens of any of claims 1 to 10, wherein, A sag height SAG31 of the object side of the third lens of the optical lens and a sag height SAG32 of the image side of the third lens of the optical lens satisfy: 0.8≤|SAG32 / SAG31|≤2.

564.

25. The optical lens of any of claims 1 to 10, wherein, A sag height SAG51 of the object side of the fifth lens of the optical lens and a sag height SAG52 of the image side of the fifth lens of the optical lens satisfy: 0.8≤|SAG51 / SAG52|≤1.

548.

26. The optical lens of any of claims 1 to 10, wherein, A center curvature radius R8 of the object side of the fourth lens of the optical lens and an R value R9 of the image side of the fourth lens of the optical lens satisfy: 0.2≤|R8 / R9|≤2.

6.

27. The optical lens of any of claims 1 to 10, wherein, The focal length value F4 of the fourth lens of the optical lens and the total focal length value F of the optical lens satisfy: 1.326≤|F4 / F|≤3.

5.

28. The optical lens of any of claims 1 to 10, wherein, The optical back focal length of the optical lens, i.e. the distance on the optical axis from the center of the image side surface of the fifth lens of the optical lens to the center of the imaging surface of the optical lens BFL, and the total optical length of the optical lens, i.e. the distance on the optical axis from the object side surface of the first lens of the optical lens to the imaging surface of the optical lens TTL, satisfy: 0.15≤BFL / TTL≤0.

302.

29. An electronic device, comprising: An imaging device comprising the optical lens according to any one of claims 1 to 28 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images