Optical lens and electronic device with same

Abstract

The application provides an optical lens and an electronic device with the same. The optical lens comprises: a first lens, the first lens having positive refractive power, a first side surface of the first lens being a convex surface, and a second side surface of the first lens being a concave surface; a second lens, the second lens having negative refractive power, a first side surface of the second lens and a second side surface of the second lens both being concave surfaces; a third lens, the third lens having positive refractive power, a first side surface of the third lens and a second side surface of the third lens both being convex surfaces; a fourth lens, the fourth lens having positive refractive power, at least one of a first side surface of the fourth lens and a second side surface of the fourth lens being a convex surface; and a fifth lens, the fifth lens having refractive power, a first side surface of the fifth lens being a convex surface, and a second side surface of the fifth lens being a concave surface. The application solves at least one of the problems that the optical lens is difficult to miniaturize, the imaging quality is poor in a dark environment, the resolving power is poor, ghost images are serious, and low cost and stability cannot be considered in the prior art.

Description

Technical Field

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

[0002] With technological advancements and increasing application demands, optical lenses have become widely used in many devices, especially in automotive applications. Optical lenses are crucial components for autonomous driving assistance systems (ADAS) to acquire external information. As ADAS rapidly develops, user demands for optical lenses are also rising. To detect greater distances, optical lenses need high light throughput. However, existing large-image-size, high-throughput optical lenses are bulky, making them unsuitable for specific installation locations. Furthermore, they often suffer from poor resolution and severe ghosting, leading to ADAS misjudgments of road conditions and failing to meet safe driving requirements. Additionally, to reduce costs and achieve portability, optical lenses typically use plastic lenses. However, the thermal expansion and contraction characteristics of plastic lenses are difficult to overcome, causing the optimal image plane to deviate from the chip at extreme temperatures ranging from -40℃ to 120℃, resulting in unclear images and other adverse effects. Moreover, highly plasticized systems have poor thermal stability, and resolution fails to meet requirements after returning to room temperature.

[0003] In other words, existing optical lenses suffer from at least one of the following problems: difficulty in miniaturization, poor image quality in low-light conditions, poor resolution, severe ghosting, and an inability to balance low cost and stability. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the following problems in the prior art: difficulty in miniaturizing optical lenses, poor image quality in dark environments, poor resolution, severe ghosting, and inability to balance low cost and stability.

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

[0006] Furthermore, both the first side surface and the second side surface of the fourth lens are convex surfaces.

[0007] Furthermore, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0008] Furthermore, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave.

[0009] Furthermore, the fifth lens has positive optical power.

[0010] Furthermore, the fifth lens has negative optical power.

[0011] Furthermore, both the first and fourth lenses are aspherical lenses.

[0012] Furthermore, both the first and fifth lenses are aspherical lenses.

[0013] Furthermore, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

[0014] Furthermore, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens.

[0015] Furthermore, the first side surface of the first lens and the second side surface of the fourth lens have inflection points.

[0016] Furthermore, the second lens and the third lens are cemented together to form a cemented lens.

[0017] Furthermore, the focal length F23 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: F23 / F≤8.

[0018] Furthermore, the radius of curvature R9 of the first side of the fifth lens, the radius of curvature R10 of the second side of the fifth lens, and the center thickness d9 of the fifth lens satisfy the following condition: 0.5≤R9 / (R10+d9)≤1.5.

[0019] Furthermore, the air gap d5 between the third and fourth lenses and the total optical length TTL of the optical lens satisfy the following condition: d5 / TTL≤0.15.

[0020] Furthermore, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy the following condition: 0.1 ≤ d4 / TTL.

[0021] Furthermore, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: 0.09 ≤ BFL / TTL.

[0022] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: TTL / H / θ≤20.

[0023] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.5.

[0024] Furthermore, the total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F / ENPD / D≤0.1.

[0025] Furthermore, the radius of curvature R1 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.8≤R1 / F≤2.

[0026] Furthermore, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.8≤F4 / F≤4.

[0027] Furthermore, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2≤(F*θ) / D.

[0028] Furthermore, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy the following condition: 80 ≤ VD2 + VD3.

[0029] Furthermore, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.06≤D / H / F.

[0030] Furthermore, 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: 1.2≤F / H≤3.8.

[0031] Furthermore, the light-transmitting aperture D9 of the first side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 7.2≤D9*BFL / H.

[0032] Furthermore, the light-transmitting aperture D10 of the second side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 5.5≤D10*BFL / H≤15.

[0033] Furthermore, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy the following condition: 0.49≤R1 / (R2+d1)≤1.5.

[0034] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.1≤F3 / F4≤1.

[0035] Furthermore, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: -11≤F5 / F≤150.

[0036] Furthermore, the sag of the first side of the third lens, SAG(S4), and the aperture of the first side of the third lens, D4, satisfy the following condition: -0.3≤arctan(SAG(S4) / D4).

[0037] Furthermore, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the following condition: 0.07≤d6 / TTL.

[0038] According to another aspect of the present invention, an optical lens is provided, comprising: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive optical power; and a fifth lens having optical power; wherein the combined focal length F23 of the second and third lenses and the overall focal length F of the optical lens satisfy the following condition: F23 / F≤8.

[0039] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0040] Furthermore, both the first side surface of the second lens and the second side surface of the second lens are concave.

[0041] Furthermore, both the first side surface and the second side surface of the third lens are convex surfaces.

[0042] Furthermore, both the first side surface and the second side surface of the fourth lens are convex surfaces.

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

[0044] Furthermore, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave.

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

[0046] Furthermore, the fifth lens has negative optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

[0047] Furthermore, both the first and fourth lenses are aspherical lenses.

[0048] Furthermore, both the first and fifth lenses are aspherical lenses.

[0049] Furthermore, the optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

[0050] Furthermore, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens.

[0051] Furthermore, the first side surface of the first lens and the second side surface of the fourth lens have inflection points.

[0052] Furthermore, the second lens and the third lens are cemented together to form a cemented lens.

[0053] Furthermore, the radius of curvature R9 of the first side of the fifth lens, the radius of curvature R10 of the second side of the fifth lens, and the center thickness d9 of the fifth lens satisfy the following condition: 0.5≤R9 / (R10+d9)≤1.5.

[0054] Furthermore, the air gap d5 between the third and fourth lenses and the total optical length TTL of the optical lens satisfy the following condition: d5 / TTL≤0.15.

[0055] Furthermore, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy the following condition: 0.1 ≤ d4 / TTL.

[0056] Furthermore, the optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: 0.09 ≤ BFL / TTL.

[0057] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: TTL / H / θ≤20.

[0058] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤1.5.

[0059] Furthermore, the total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F / ENPD / D≤0.1.

[0060] Furthermore, the radius of curvature R1 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.8≤R1 / F≤2.

[0061] Furthermore, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.8≤F4 / F≤4.

[0062] Furthermore, the following conditions must be met between the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens: 0.2≤(F*θ) / D.

[0063] Furthermore, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy the following condition: 80 ≤ VD2 + VD3.

[0064] Furthermore, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.06≤D / H / F.

[0065] Furthermore, 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: 1.2≤F / H≤3.8.

[0066] Furthermore, the light-transmitting aperture D9 of the first side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 7.2≤D9*BFL / H.

[0067] Furthermore, the light-transmitting aperture D10 of the second side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 5.5≤D10*BFL / H≤15.

[0068] Furthermore, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy the following condition: 0.49≤R1 / (R2+d1)≤1.5.

[0069] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.1≤F3 / F4≤1.

[0070] Furthermore, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: -11≤F5 / F≤150.

[0071] Furthermore, the sag of the first side of the third lens, SAG(S4), and the aperture of the first side of the third lens, D4, satisfy the following condition: -0.3≤arctan(SAG(S4) / D4).

[0072] Furthermore, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the following condition: 0.07≤d6 / TTL.

[0073] According to another aspect of the present invention, an electronic device is provided, comprising the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0074] The above technical solution sets the first lens to have positive optical power, which can converge light. By setting the first side of the first lens to be convex and the second side of the first lens to be concave, the shape of the first lens is close to a concentric circle, which is beneficial to reduce the light at the front end and reduce the height of the light entering the second lens, which is beneficial to reduce the front diameter of the optical lens.

[0075] By setting the second lens to have negative optical power, it receives the light emitted from the first lens and diverges it appropriately. At the same time, setting both the first side surface of the second lens and the second side surface of the second lens to be concave surfaces is beneficial for the smooth emission of light and improves aberrations.

[0076] By setting the third lens to have positive optical power, it has a converging effect on light. At the same time, setting both the first and second sides of the third lens to be convex surfaces allows the light emitted from the second lens to converge more effectively, providing greater adjustment capability for defocusing in both the peripheral and central fields of view, thereby improving image quality.

[0077] By cementing the second and third lenses together to form a cemented lens, and by properly controlling the material combination of the two lenses, chromatic aberration can be reduced. By controlling the combined focal length of the cemented lens, the trajectory of light entering the cemented lens can be effectively controlled, reducing aberrations caused by large-angle light entering through the first lens. At the same time, the lens structure is compact, which is conducive to miniaturization. The cemented surface has a large angle, which is conducive to the rapid focusing of peripheral light and improves image quality.

[0078] By setting the fourth lens to have positive optical power, the light collected at the front end can be compressed and the light transitions smoothly to the rear, reducing system sensitivity and simultaneously reducing the rear aperture of the optical lens, thus lowering costs. Optionally, both the first and second sides of the fourth lens are convex. This further converges the light, causing the edge field rays to bend towards the optical axis after passing through the second side of the fourth lens, which helps to reduce the rear aperture of the optical lens. Of course, the first side of the fourth lens can also be set to be concave and the second side to be convex. This is beneficial for receiving light passing through the third lens, as the light from each field of view is deflected, resulting in less energy loss, and the light transition is smooth, which helps to reduce lens sensitivity. Alternatively, the first side of the fourth lens can be convex and the second side to be concave, meaning the fourth lens is meniscus. This is beneficial for collecting light from a large field of view, increasing the light transmission of the optical lens; the concave second side of the fourth lens means that the optical path length of the edge field of view and the center field of view is different when passing through the lens, with a longer optical path length in the edge field of view, which is beneficial for defocusing to correct aberrations in the edge field of view and improve resolution.

[0079] By setting the first side of the fifth lens to be convex and the second side to be concave, it is beneficial to focus the light rays, achieving the requirement of a large aperture. Optionally, the fifth lens has a positive optical power, which has a converging effect on the light rays. Properly setting the optical power of the fifth lens further deflects the light rays along the optical axis, reducing the rear aperture. Alternatively, the fifth lens can be set to have a negative optical power, which has a diverging effect on the light rays, providing a larger light-receiving surface for the subsequent optical system. Properly allocating the optical power helps reduce aberrations and improve optical performance. Attached Figure Description

[0080] 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:

[0081] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0082] Figure 2 A cross-sectional view of the optical lens of Example 2 of the present invention is shown;

[0083] Figure 3 A cross-sectional view of the optical lens of Example 3 of the present invention is shown;

[0084] Figure 4 A cross-sectional view of the optical lens of Example 4 of the present invention is shown;

[0085] Figure 5 A cross-sectional view of the optical lens of Example 5 of the present invention is shown;

[0086] Figure 6 A cross-sectional view of the optical lens of Example Six of the present invention is shown;

[0087] Figure 7 A cross-sectional view of the optical lens of Example Seven of the present invention is shown;

[0088] Figure 8 A cross-sectional view of the optical lens of Example 8 of the present invention is shown.

[0089] The above figures include the following reference numerals:

[0090] STO, Aperture Stop; L1, First Lens; S1, First Side of First Lens; S2, Second Side of First Lens; L2, Second Lens; S3, First Side of Second Lens; S4, Second Side of Second Lens (First Side of Third Lens); L3, Third Lens; S5, Second Side of Third Lens; L4, Fourth Lens; S6, First Side of Fourth Lens; S7, Second Side of Fourth Lens; L5, Fifth Lens; S9, First Side of Fifth Lens; S10, Second Side of Fifth Lens; S11, First Side of Filter; S12, Second Side of Filter; IMA, Imaging Surface. Detailed Implementation

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the first side surface of the lens, and the surface of each lens closest to the image side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0097] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0098] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0099] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0100] In order to solve at least one of the problems in the existing technology, such as difficulty in miniaturizing optical lenses, poor image quality in dark environments, poor resolution, severe ghosting, and the inability to balance low cost and stability, the present invention provides an optical lens and an electronic device having the same.

[0101] Example 1

[0102] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has positive optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave. The second lens has negative optical power, and both the first and second side surfaces of the second lens are concave. The third lens has positive optical power, and both the first and second side surfaces of the third lens are convex. The fourth lens has positive optical power, and at least one of the first and second side surfaces of the fourth lens is convex. The fifth lens has optical power, a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is concave.

[0103] By setting the first lens to have positive optical power, light can be converged. By setting the first side of the first lens to be convex and the second side of the first lens to be concave, the shape of the first lens is close to a concentric circle, which helps to reduce the light at the front end and lowers the height of the light entering the second lens, thus helping to reduce the front diameter of the optical lens.

[0104] By setting the second lens to have negative optical power, it receives the light emitted from the first lens and diverges it appropriately. At the same time, setting both the first side surface of the second lens and the second side surface of the second lens to be concave surfaces is beneficial for the smooth emission of light and improves aberrations.

[0105] By setting the third lens to have positive optical power, it has a converging effect on light. At the same time, setting both the first and second sides of the third lens to be convex surfaces allows the light emitted from the second lens to converge more effectively, providing greater adjustment capability for defocusing in both the peripheral and central fields of view, thereby improving image quality.

[0106] By setting the fourth lens to have positive optical power, it is possible to compress the light collected at the front end and make the light transition smoothly to the rear, reducing system sensitivity, while reducing the rear aperture of the optical lens and lowering costs.

[0107] Optionally, both the first and second sides of the fourth lens are convex surfaces. This further converges light rays, causing edge field rays to bend towards the optical axis after passing through the second side of the fourth lens, which helps to reduce the rear aperture of the optical lens.

[0108] Of course, the first side of the fourth lens can also be set to be concave, and the second side to be convex. This is beneficial for receiving light rays that have passed through the third lens, as the light rays in each field of view are deflected, resulting in less energy loss. At the same time, the light transition is smooth, which helps to reduce the sensitivity of the lens.

[0109] Of course, the first side of the fourth lens can also be set to be convex and the second side to be concave, that is, the fourth lens is crescent-shaped, which is beneficial for collecting light from a large field of view and increasing the light transmission of the optical lens; the second side of the fourth lens is concave, so the optical path of the light rays in the edge field of view and the center field of view is different when they pass through the lens, and the optical path of the edge field of view is longer, which is beneficial for defocusing to correct the aberrations of the edge field of view and improve resolution.

[0110] By setting the first side of the fifth lens to be convex and the second side of the fifth lens to be concave, it is beneficial to concentrate the light rays and achieve the requirement of a large aperture.

[0111] Optionally, the fifth lens has positive optical power and converges light rays. By reasonably setting the optical power of the fifth lens, the light rays are further deflected in the direction of the optical axis, thereby reducing the rear port diameter.

[0112] Of course, the fifth lens can also be configured to have negative optical power, which has a diverging effect on light, so that the subsequent optical system has a larger light receiving surface. Reasonable allocation of optical power is conducive to reducing aberrations and improving optical performance.

[0113] Optionally, both the first and fourth lenses are aspherical lenses. Alternatively, both the first and fifth lenses can be aspherical lenses. This is beneficial for correcting system aberrations, improving resolution, and especially reducing aberrations over a large field of view.

[0114] In this embodiment, the optical lens also includes an aperture stop. Optionally, the aperture stop is located between the fourth lens and the fifth lens, which helps to effectively converge the light entering the optical lens, reduce the lens aperture at the front of the optical lens, and reduce the assembly sensitivity of the optical lens. Of course, the aperture stop can also be placed between the third lens and the fourth lens.

[0115] In this embodiment, the first side surface of the first lens and the second side surface of the fourth lens have inflection points, which helps to balance the aberrations of the central field of view and the edge field of view and improve resolution.

[0116] In this embodiment, the second and third lenses are cemented together to form a cemented lens. Using a cemented lens reduces the air gap between the two lenses, resulting in a more compact overall optical lens structure. It also reduces tolerance-sensitive issues such as overall eccentricity during lens assembly, minimizes light loss due to inter-lens reflections, and the combination of high and low refractive indices facilitates rapid transition of light rays, increases aperture diameter, and enhances light transmission. Furthermore, it effectively eliminates ghosting effects on the optical lens, ensuring high resolution while eliminating ghosting. Properly controlling the material composition of the second and third lenses reduces chromatic aberration, allowing for thorough correction of various aberrations. Under a compact structure, it improves resolution and optimizes optical performance such as distortion and CRA (prime angle). Additionally, the negative lens in the cemented lens has a higher refractive index than the positive lens, enabling effective and smooth convergence of light rays, ensuring a stable arrival at the imaging plane. The larger angle of the cemented surface facilitates rapid focusing of peripheral light, improving image quality while reducing overall weight and cost.

[0117] In this embodiment, the focal length F23 of the cemented lens and the total focal length F of the optical lens satisfy the condition: F23 / F ≤ 8. By limiting F23 / F within a reasonable range, the trajectory of light entering the cemented lens can be effectively controlled, reducing aberrations caused by large-angle light rays entering through the first lens, while also making the optical lens structure compact and facilitating miniaturization. Preferably, F23 / F ≤ 6.

[0118] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens, the radius of curvature R10 of the second side surface of the fifth lens, and the center thickness d9 of the fifth lens satisfy the following condition: 0.5 ≤ R9 / (R10+d9) ≤ 1.5. By limiting R9 / (R10+d9) within a reasonable range, the shape of the fifth lens is close to a concentric circle, resulting in an optical path difference between the peripheral rays and the central rays passing through the fifth lens. This diverges the central rays into the rear optical system and reduces the aperture of the front lens, thereby reducing the lens size and facilitating miniaturization and cost reduction. Preferably, 0.6 ≤ R9 / (R10+d9) ≤ 1.3.

[0119] In this embodiment, the air gap d5 between the third and fourth lenses and the total optical length TTL of the optical lens satisfy the following condition: d5 / TTL ≤ 0.15. By limiting d5 / TTL to a reasonable range and setting the air gap between the third and fourth lenses appropriately, it is beneficial to achieve a compact overall structure and miniaturization of the optical lens. Preferably, d5 / TTL ≤ 0.1.

[0120] In this embodiment, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy the condition: 0.1 ≤ d4 / TTL. By limiting d4 / TTL within a reasonable range and setting the center thickness of the third lens appropriately, it is beneficial to achieve a compact overall structure and miniaturization of the optical lens. Preferably, 0.2 ≤ d4 / TTL.

[0121] In this embodiment, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the condition: 0.09 ≤ BFL / TTL. Limiting BFL / TTL to a reasonable range helps meet the specific requirements of the optical lens's back focal length, and also provides space for optical component installation and focusing, avoiding mechanical interference. Preferably, 0.13 ≤ BFL / TTL.

[0122] In this embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) of the maximum field of view of the optical lens satisfy the following condition: TTL / H / θ ≤ 20. By limiting TTL / H / θ to a reasonable range, a shorter total optical length is ensured under the same imaging plane, enabling lens miniaturization. Preferably, TTL / H / θ ≤ 18.

[0123] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD ≤ 1.5. By limiting F / ENPD within a reasonable range, a larger entrance pupil diameter can be controlled, which is beneficial for increasing light transmission and achieving a small FNO. Preferably, F / ENPD ≤ 1.1.

[0124] In this embodiment, the overall focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F / ENPD / D ≤ 0.1. By limiting F / ENPD / D within a reasonable range, a small aperture is ensured while maintaining high light transmission, which is beneficial for lens miniaturization. Preferably, F / ENPD / D ≤ 0.08.

[0125] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.8 ≤ R1 / F ≤ 2. By limiting R1 / F within a reasonable range, it is beneficial to rationally allocate the focal length of the first lens, which helps to balance various aberrations and achieve high resolution. Preferably, 1 ≤ R1 / F ≤ 1.6.

[0126] In this embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.8 ≤ F4 / F ≤ 4. By limiting F4 / F within a reasonable range, the focal length of the fourth lens can be reasonably allocated, which is beneficial for light rays with a large field of view to enter the optical system. Preferably, 1 ≤ F4 / F ≤ 3.5.

[0127] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2 ≤ (F*θ) / D. By limiting (F*θ) / D within a reasonable range, the front aperture of the lens can be made smaller, reducing the size of the optical lens. Preferably, 0.3 ≤ (F*θ) / D.

[0128] In this embodiment, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy the condition: 80 ≤ VD2 + VD3. By limiting VD2 + VD3 within a reasonable range, the material combination of the second and third lenses can be reasonably set, which helps to correct chromatic aberration and improve resolution. Preferably, 90 ≤ VD2 + VD3.

[0129] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.06 ≤ D / H / F. By limiting D / H / F within a reasonable range, under the condition of fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, 0.1 ≤ D / H / F.

[0130] In this embodiment, 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: 1.2 ≤ F / H ≤ 3.8. Limiting F / H within a reasonable range is beneficial for improving resolution. Preferably, 1.7 ≤ F / H ≤ 2.9.

[0131] In this embodiment, the light-transmitting aperture D9 of the first side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 7.2 ≤ D9 * BFL / H. By limiting D9 * BFL / H to a reasonable range, under the same imaging plane and the same image height, a shorter back focal length is beneficial for achieving a smaller CRA (Cost Reduction Aspect Ratio). Preferably, 8 ≤ D9 * BFL / H.

[0132] In this embodiment, the light-transmitting aperture D10 of the second side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 5.5 ≤ D10 * BFL / H ≤ 15. By limiting D10 * BFL / H within a reasonable range, a shorter back focal length is beneficial for achieving a smaller CRA (Cost Reduction Aspect Ratio) under the same imaging plane and image height. Preferably, 6.8 ≤ D10 * BFL / H ≤ 13.

[0133] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy the following condition: 0.49 ≤ R1 / (R2+d1) ≤ 1.5. By limiting R1 / (R2+d1) within a reasonable range, the first lens is specially configured with a shape close to a concentric circle, resulting in an optical path difference between the peripheral rays and the central rays, diverging the central rays before they enter the rear optical system, which is beneficial for achieving high resolution. Preferably, 0.6 ≤ R1 / (R2+d1) ≤ 1.

[0134] In this embodiment, the focal lengths F3 and F4 of the third lens satisfy the condition: 0.1 ≤ F3 / F4 ≤ 1. By limiting F3 / F4 to a reasonable range, the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.2 ≤ F3 / F4 ≤ 0.8.

[0135] In this embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following relationship: -11 ≤ F5 / F ≤ 150. By limiting F5 / F within a reasonable range, the fifth lens, which is also the last lens, has a short focal length, which helps to collect light and ensures sufficient light transmission. Preferably, -9 ≤ F5 / F ≤ 110.

[0136] In this embodiment, the sag SAG(S4) of the first side of the third lens and the aperture D4 of the first side of the third lens satisfy the condition: -0.3 ≤ arctan(SAG(S4) / D4). By limiting arctan(SAG(S4) / D4) within a reasonable range, the angle of the cemented surface is larger, which is beneficial for the rapid focusing of peripheral light and improves the image quality. Preferably, -0.2 ≤ arctan(SAG(S4) / D4).

[0137] In this embodiment, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the condition: 0.07 ≤ d6 / TTL. By limiting d6 / TTL within a reasonable range, the center thickness of the fourth lens is kept relatively large, which helps to reduce lens reflection and achieve a ghosting-free effect; at the same time, it facilitates the reduction of the rear aperture and ensures smooth light transition, thus guaranteeing image quality. Preferably, 0.09 ≤ d6 / TTL.

[0138] Example 2

[0139] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has positive optical power; the second lens has negative optical power; the third lens has positive optical power; the fourth lens has positive optical power; and the fifth lens has optical power. The combined focal length F23 of the second and third lenses and the overall focal length F of the optical lens satisfy the following condition: F23 / F≤8.

[0140] By setting the first lens to have positive optical power, light can be converged. By setting the second lens to have negative optical power, light emitted from the first lens is received and appropriately diverged. By setting the third lens to have positive optical power, light is converged. By setting the fourth lens to have positive optical power, the light collected at the front end can be compressed and the light transitions smoothly to the rear, reducing system sensitivity and simultaneously reducing the rear aperture of the optical lens, thus lowering costs. Optionally, the fifth lens has positive optical power and converges light; appropriately setting the optical power of the fifth lens further deflects the light along the optical axis, reducing the rear aperture. Of course, the fifth lens can also be set to have negative optical power and diverge light, giving the subsequent optical system a larger light-receiving surface. Appropriate allocation of optical power helps reduce aberrations and improve optical performance.

[0141] Using cemented lenses reduces the air gap between two lenses, resulting in a more compact overall optical lens structure. It also reduces tolerance-sensitive issues such as overall eccentricity during lens assembly, minimizes light loss due to inter-lens reflections, and the combination of high and low refractive indices facilitates rapid transition of light from the front, allowing for a larger aperture and increased light transmission. Furthermore, it effectively eliminates ghosting, ensuring high resolution while eliminating ghosting. Properly controlling the material combination of the second and third lenses reduces chromatic aberration, allowing for thorough correction of various aberrations. Despite the compact structure, it improves resolution and optimizes optical performance such as distortion and CRA (principal angle). Additionally, the negative lens in the cemented lens has a higher refractive index than the positive lens, ensuring effective and smooth convergence of light at the final point, allowing light to reach the image plane smoothly. The larger angle of the cemented surface also facilitates rapid focusing of peripheral light, improving image quality while reducing overall weight and cost. By limiting F23 / F within a reasonable range, the trajectory of light entering the cemented lens can be effectively controlled, reducing aberrations caused by large-angle light rays entering through the first lens. This also allows for a more compact optical lens structure, facilitating miniaturization. Preferably, F23 / F ≤ 6.

[0142] By designing the first side of the first lens to be convex and the second side to be concave, the shape of the first lens approximates a concentric circle. This helps to constrict the light rays at the front end, reducing the height at which light enters the second lens and thus allowing for a smaller front aperture of the optical lens. By designing both the first and second sides of the second lens to be concave, the light rays exiting the second lens converge more effectively, providing greater adjustment capability for defocusing in both the peripheral and central fields of view, thereby improving image quality.

[0143] Optionally, both the first and second sides of the fourth lens are convex. This further converges light rays, causing edge field rays to bend towards the optical axis after passing through the second side of the fourth lens, which helps reduce the rear aperture of the optical lens. Alternatively, the first side of the fourth lens can be concave, and the second side convex. This facilitates the reception of light rays passing through the third lens, minimizing energy loss due to refraction across different fields of view, and ensuring a smooth transition, thus reducing lens sensitivity. Furthermore, the first side of the fourth lens can be convex, and the second side concave, making the fourth lens meniscus. This helps collect light rays from a large field of view, increasing the lens's light transmission. The concave second side of the fourth lens results in a different optical path between the edge and center fields of view, with a longer path at the edges, which helps correct aberrations in the edge fields and improves resolution. By setting the first side of the fifth lens to be convex and the second side concave, it facilitates light convergence, achieving the desired large aperture.

[0144] Optionally, both the first and fourth lenses are aspherical lenses. Alternatively, both the first and fifth lenses can be aspherical lenses. This is beneficial for correcting system aberrations, improving resolution, and especially reducing aberrations over a large field of view.

[0145] In this embodiment, the optical lens also includes an aperture stop. Optionally, the aperture stop is located between the fourth lens and the fifth lens, which helps to effectively converge the light entering the optical lens, reduce the lens aperture at the front of the optical lens, and reduce the assembly sensitivity of the optical lens. Of course, the aperture stop can also be placed between the third lens and the fourth lens.

[0146] In this embodiment, the first side surface of the first lens and the second side surface of the fourth lens have inflection points, which helps to balance the aberrations of the central field of view and the edge field of view and improve resolution.

[0147] In this embodiment, the second and third lenses are cemented together to form a cemented lens. Using a cemented lens reduces the air gap between the two lenses, resulting in a more compact overall optical lens structure. It also reduces tolerance-sensitive issues such as overall eccentricity during lens assembly, minimizes light loss due to inter-lens reflections, and the combination of high and low refractive indices facilitates rapid transition of light rays, increases aperture diameter, and enhances light transmission. Furthermore, it effectively eliminates ghosting effects on the optical lens, ensuring high resolution while eliminating ghosting. Properly controlling the material composition of the second and third lenses reduces chromatic aberration, allowing for thorough correction of various aberrations. Under a compact structure, it improves resolution and optimizes optical performance such as distortion and CRA (prime angle). Additionally, the negative lens in the cemented lens has a higher refractive index than the positive lens, enabling effective and smooth convergence of light rays, ensuring a stable arrival at the imaging plane. The larger angle of the cemented surface facilitates rapid focusing of peripheral light, improving image quality while reducing overall weight and cost.

[0148] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens, the radius of curvature R10 of the second side surface of the fifth lens, and the center thickness d9 of the fifth lens satisfy the following condition: 0.5 ≤ R9 / (R10+d9) ≤ 1.5. By limiting R9 / (R10+d9) within a reasonable range, the shape of the fifth lens is close to a concentric circle, resulting in an optical path difference between the peripheral rays and the central rays passing through the fifth lens. This diverges the central rays into the rear optical system and reduces the aperture of the front lens, thereby reducing the lens size and facilitating miniaturization and cost reduction. Preferably, 0.6 ≤ R9 / (R10+d9) ≤ 1.3.

[0149] In this embodiment, the air gap d5 between the third and fourth lenses and the total optical length TTL of the optical lens satisfy the following condition: d5 / TTL ≤ 0.15. By limiting d5 / TTL to a reasonable range and setting the air gap between the third and fourth lenses appropriately, it is beneficial to achieve a compact overall structure and miniaturization of the optical lens. Preferably, d5 / TTL ≤ 0.1.

[0150] In this embodiment, the center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy the condition: 0.1 ≤ d4 / TTL. By limiting d4 / TTL within a reasonable range and setting the center thickness of the third lens appropriately, it is beneficial to achieve a compact overall structure and miniaturization of the optical lens. Preferably, 0.2 ≤ d4 / TTL.

[0151] In this embodiment, the optical back focal length (BFL) and the total optical length (TTL) of the optical lens satisfy the condition: 0.09 ≤ BFL / TTL. Limiting BFL / TTL to a reasonable range helps meet the specific requirements of the optical lens's back focal length, and also provides space for optical component installation and focusing, avoiding mechanical interference. Preferably, 0.13 ≤ BFL / TTL.

[0152] In this embodiment, the total optical length (TTL) of the optical lens, the image height (H) corresponding to the maximum field of view of the optical lens, and the radian value (θ) of the maximum field of view of the optical lens satisfy the following condition: TTL / H / θ ≤ 20. By limiting TTL / H / θ to a reasonable range, a shorter total optical length is ensured under the same imaging plane, enabling lens miniaturization. Preferably, TTL / H / θ ≤ 18.

[0153] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD ≤ 1.5. By limiting F / ENPD within a reasonable range, a larger entrance pupil diameter can be controlled, which is beneficial for increasing light transmission and achieving a small FNO. Preferably, F / ENPD ≤ 1.1.

[0154] In this embodiment, the overall focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: F / ENPD / D ≤ 0.1. By limiting F / ENPD / D within a reasonable range, a small aperture is ensured while maintaining high light transmission, which is beneficial for lens miniaturization. Preferably, F / ENPD / D ≤ 0.08.

[0155] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.8 ≤ R1 / F ≤ 2. By limiting R1 / F within a reasonable range, it is beneficial to rationally allocate the focal length of the first lens, which helps to balance various aberrations and achieve high resolution. Preferably, 1 ≤ R1 / F ≤ 1.6.

[0156] In this embodiment, the focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.8 ≤ F4 / F ≤ 4. By limiting F4 / F within a reasonable range, the focal length of the fourth lens can be reasonably allocated, which is beneficial for light rays with a large field of view to enter the optical system. Preferably, 1 ≤ F4 / F ≤ 3.5.

[0157] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2 ≤ (F*θ) / D. By limiting (F*θ) / D within a reasonable range, the front aperture of the lens can be made smaller, reducing the size of the optical lens. Preferably, 0.3 ≤ (F*θ) / D.

[0158] In this embodiment, the Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy the condition: 80 ≤ VD2 + VD3. By limiting VD2 + VD3 within a reasonable range, the material combination of the second and third lenses can be reasonably set, which helps to correct chromatic aberration and improve resolution. Preferably, 90 ≤ VD2 + VD3.

[0159] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.06 ≤ D / H / F. By limiting D / H / F within a reasonable range, under the condition of fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, 0.1 ≤ D / H / F.

[0160] In this embodiment, 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: 1.2 ≤ F / H ≤ 3.8. Limiting F / H within a reasonable range is beneficial for improving resolution. Preferably, 1.7 ≤ F / H ≤ 2.9.

[0161] In this embodiment, the light-transmitting aperture D9 of the first side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 7.2 ≤ D9 * BFL / H. By limiting D9 * BFL / H to a reasonable range, under the same imaging plane and the same image height, a shorter back focal length is beneficial for achieving a smaller CRA (Cost Reduction Aspect Ratio). Preferably, 8 ≤ D9 * BFL / H.

[0162] In this embodiment, the light-transmitting aperture D10 of the second side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 5.5 ≤ D10 * BFL / H ≤ 15. By limiting D10 * BFL / H within a reasonable range, a shorter back focal length is beneficial for achieving a smaller CRA (Cost Reduction Aspect Ratio) under the same imaging plane and image height. Preferably, 6.8 ≤ D10 * BFL / H ≤ 13.

[0163] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy the following condition: 0.49 ≤ R1 / (R2+d1) ≤ 1.5. By limiting R1 / (R2+d1) within a reasonable range, the first lens is specially configured with a shape close to a concentric circle, resulting in an optical path difference between the peripheral rays and the central rays, diverging the central rays before they enter the rear optical system, which is beneficial for achieving high resolution. Preferably, 0.6 ≤ R1 / (R2+d1) ≤ 1.

[0164] In this embodiment, the focal lengths F3 and F4 of the third lens satisfy the condition: 0.1 ≤ F3 / F4 ≤ 1. By limiting F3 / F4 to a reasonable range, the focal lengths of adjacent lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, 0.2 ≤ F3 / F4 ≤ 0.8.

[0165] In this embodiment, the focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following relationship: -11 ≤ F5 / F ≤ 150. By limiting F5 / F within a reasonable range, the fifth lens, which is also the last lens, has a short focal length, which helps to collect light and ensures sufficient light transmission. Preferably, -9 ≤ F5 / F ≤ 110.

[0166] In this embodiment, the sag SAG(S4) of the first side of the third lens and the aperture D4 of the first side of the third lens satisfy the condition: -0.3 ≤ arctan(SAG(S4) / D4). By limiting arctan(SAG(S4) / D4) within a reasonable range, the angle of the cemented surface is larger, which is beneficial for the rapid focusing of peripheral light and improves the image quality. Preferably, -0.2 ≤ arctan(SAG(S4) / D4).

[0167] In this embodiment, the center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the condition: 0.07 ≤ d6 / TTL. By limiting d6 / TTL within a reasonable range, the center thickness of the fourth lens is kept relatively large, which helps to reduce lens reflection and achieve a ghosting-free effect; at the same time, it facilitates the reduction of the rear aperture and ensures smooth light transition, thus guaranteeing image quality. Preferably, 0.09 ≤ d6 / TTL.

[0168] It should be noted that the total length TTL of the optical lens is the distance from the first side of the first lens to the imaging plane of the optical lens, and the optical back focal length BFL is the distance from the last lens to the imaging plane of the optical lens.

[0169] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0170] The optical lens in this application may employ multiple lenses, such as the five lenses mentioned above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Specifically, when the imaging quality of the optical lens is the primary concern, all five lenses may be aspherical.

[0171] In an exemplary embodiment, the first to 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°C to 105°C. Specifically, when resolution and reliability are of primary concern, the first to fifth 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.

[0172] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a 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.

[0173] 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.

[0174] 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.

[0175] Example 1

[0176] like Figure 1 As shown, the optical lens includes, in sequence from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA.

[0177] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0178] In this example, the focal length F of the optical lens is 13.5189mm, the total length TTL of the optical lens is 41.8026mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0179] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0180] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0181] 1 19.9254 3.9879 1.69 53.15 2 20.0463 4.0829 3 -18.4519 0.5000 1.62 36.35 4 18.1122 10.7834 1.62 63.41 5 -15.7240 3.6376 6 12.7953 10.1386 1.59 61.25 7 -300.0283 1.8851 STO Infinity -1.7090 9 4.8501 1.5444 1.69 31.08 10 4.2697 2.9082 11 Infinity 1.0609 1.52 54.09 12 Infinity 2.9825 IMA / /

[0182] Table 1

[0183] In this example, both the first and fifth lenses are aspherical lenses. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0184]

[0185] Where x is the distance vector from the vertex of the aspherical surface along the optical axis at a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and A is the higher-order coefficient. Table 2 below shows the conic coefficient k and the higher-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the aspherical lens surface in this example.

[0186] 1 0.2527 -8.7814E-05 -3.5616E-07 3.7668E-09 -1.0251E-10 2.5935E-13 1.4389E-22 0.0000E+00 2 1.8846 -1.1946E-04 8.3253E-07 -1.5964E-08 1.0602E-10 -1.0211E-12 1.9635E-27 0.0000E+00 9 -0.7717 5.0890E-04 1.7764E-05 -1.3850E-07 -6.1996E-08 -3.9225E-09 2.2464E-10 0.0000E+00 10 -0.5417 4.7809E-04 1.2628E-04 -1.7260E-05 1.1740E-07 5.5137E-08 -2.2891E-09 0.0000E+00

[0187] Table 2

[0188] Example 2

[0189] like Figure 2 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0190] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0191] In this example, the focal length F of the optical lens is 13.5449mm, the total length TTL of the optical lens is 42.0514mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0192] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0193] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0194]

[0195]

[0196] Table 3

[0197] In this example, both the first lens and the fifth lens are aspherical lenses.

[0198] Table 4 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0199] 1 0.2527 -8.7814E-05 -3.5615E-07 3.7668E-09 -1.0251E-10 2.5935E-13 1.4389E-22 0.0000E+00 2 1.8846 -1.1946E-04 8.3253E-07 -1.5964E-08 1.0602E-10 -1.0211E-12 1.9081E-27 0.0000E+00 9 -0.7769 5.0140E-04 1.7248E-05 -1.6243E-07 -6.3252E-08 -3.9764E-09 1.1138E-10 0.0000E+00 10 -0.5422 4.7907E-04 1.2580E-04 -1.7325E-05 1.1276E-07 5.4711E-08 -1.1589E-09 0.0000E+00

[0200] Table 4

[0201] Example 3

[0202] like Figure 3 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0203] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0204] In this example, the focal length F of the optical lens is 13.7197mm, the total length TTL of the optical lens is 37.5923mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0205] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0206] Table 5 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0207]

[0208]

[0209] Table 5

[0210] In this example, both the first and fourth lenses are aspherical lenses.

[0211] Table 6 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0212] 1 -0.2570 -8.4429E-05 -1.5083E-06 1.2966E-08 -1.5378E-10 1.8378E-12 -2.1585E-14 0.0000E+00 2 0.8640 -1.8765E-04 1.0992E-06 -5.2647E-08 7.4218E-10 -1.2909E-12 -5.7372E-14 0.0000E+00 6 200.0000 -3.1405E-05 -6.5299E-07 1.1340E-08 3.9229E-10 -4.4690E-12 -1.7082E-14 0.0000E+00 7 1.7554 -9.1180E-07 1.7794E-06 5.6950E-10 -1.5278E-11 7.6787E-14 -8.7982E-14 0.0000E+00

[0213] Table 6

[0214] Example 4

[0215] like Figure 4 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0216] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0217] In this example, the focal length F of the optical lens is 13.7768mm, the total length TTL of the optical lens is 38.3304mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0218] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0219] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0220] 1 15.5171 4.5363 1.69 53.15 2 14.4576 2.2055 3 -51.5922 1.6250 1.62 36.35 4 9.1576 12.7494 1.62 63.41 5 -15.8491 0.2605 6 -334.9970 5.0398 1.59 61.16 7 -21.1430 1.9643 STO Infinity -1.8228 9 6.7617 4.4847 1.69 54.57 10 5.2378 2.9082 11 Infinity 1.0609 1.52 54.09 12 Infinity 3.3186 IMA / /

[0221] Table 7

[0222] In this example, both the first and fourth lenses are aspherical lenses.

[0223] Table 8 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0224] 1 -0.2560 -8.4412E-05 -1.5063E-06 1.2980E-08 -1.5370E-10 1.8372E-12 -2.1572E-14 0.0000E+00 2 0.8628 -1.8770E-04 1.0967E-06 -5.2672E-08 7.4202E-10 -1.2925E-12 -5.7445E-14 0.0000E+00 6 2798.5000 -3.1507E-05 -6.4996E-07 1.1381E-08 3.9229E-10 -4.4832E-12 -1.7574E-14 0.0000E+00 7 1.7519 -7.3486E-07 1.7761E-06 4.7595E-10 -1.6778E-11 6.7899E-14 -8.7888E-14 0.0000E+00

[0225] Table 8

[0226] Example 5

[0227] like Figure 5As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0228] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0229] In this example, the focal length F of the optical lens is 14.6995mm, the total length TTL of the optical lens is 39.3595mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0230] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0231] In this example, the first side surface of the first lens and the second side surface of the fourth lens have inflection points.

[0232] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0233] 1 18.2379 3.9366 1.69 53.15 2 17.1428 3.4895 3 -17.8100 1.2274 1.62 36.35 4 15.3022 11.5388 1.62 63.41 5 -15.3022 0.1024 6 10.3402 9.3140 1.59 61.16 7 114.6164 2.6811 STO Infinity -2.5816 9 6.4053 1.5875 1.69 54.57 10 4.5169 2.8658 11 Infinity 1.0454 1.52 54.09 12 Infinity 4.1524 IMA / /

[0234] Table 9

[0235] In this example, both the first and fourth lenses are aspherical lenses.

[0236] Table 10 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0237] 1 -0.4167 -1.4192E-04 -5.2490E-07 4.6734E-11 -8.2539E-11 1.5990E-12 -1.1694E-14 0.0000E+00 2 0.9552 -2.4488E-04 1.1307E-07 -9.2479E-09 2.2536E-10 -1.4776E-12 1.7878E-15 0.0000E+00 6 -0.5222 -1.1726E-05 1.0148E-07 -8.4543E-09 1.2331E-10 -1.4071E-12 4.8839E-15 0.0000E+00 7 159.4500 5.9026E-06 -1.6228E-06 4.2611E-09 1.4565E-10 -3.4094E-12 2.3693E-14 0.0000E+00

[0238] Table 10

[0239] Example 6

[0240] like Figure 6 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture stop STO, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0241] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0242] In this example, the focal length F of the optical lens is 14.0000mm, the total length TTL of the optical lens is 33.3451mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0243] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0244] In this example, the first side surface of the first lens and the second side surface of the fourth lens have inflection points.

[0245] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0246] 1 15.0245 3.3413 1.69 53.15 2 14.2811 2.9159 3 -14.7858 0.9151 1.62 36.35 4 12.6756 9.6011 1.62 63.41 5 -12.6756 0.0857 6 8.6322 7.8171 1.59 61.16 7 94.2069 1.7996 STO Infinity -1.7072 9 6.5338 1.3015 1.69 54.57 10 4.0867 2.3770 11 Infinity 0.8671 1.52 54.09 12 Infinity 4.0310 IMA / /

[0247] Table 11

[0248] In this example, both the first and fourth lenses are aspherical lenses.

[0249] Table 12 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0250]

[0251]

[0252] Table 12

[0253] Example 7

[0254] like Figure 7 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0255] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0256] In this example, the focal length F of the optical lens is 13.2025mm, the total length TTL of the optical lens is 35.4123mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0257] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0258] Table 13 shows the basic structural parameters of the optical lens in Example 7, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0259] 1 20.3879 3.4986 1.69 53.15 2 21.4358 3.0077 3 -21.8812 1.2297 1.62 36.35 4 9.3219 9.8960 1.62 63.41 5 -16.1748 0.2317 STO Infinity -0.1309 6 10.9568 10.4505 1.59 61.25 7 -98.3084 0.1052 9 4.9418 1.6264 1.69 31.08 10 3.4825 3.0000 11 Infinity 0.5000 1.52 54.09 12 Infinity 1.9975 IMA / /

[0260] Table 13

[0261] In this example, both the first lens and the fifth lens are aspherical lenses.

[0262] Table 14 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0263] 1 0.4009 -8.7461E-05 -1.6983E-07 2.0782E-09 -8.3619E-11 1.1175E-12 -1.2241E-14 0.0000E+00 2 2.4591 -8.4723E-05 6.9420E-07 -2.7859E-08 2.2921E-10 -8.8192E-13 -2.3389E-14 0.0000E+00 9 -1.0124 2.7026E-04 -1.0187E-05 -1.0896E-06 -2.4458E-08 -2.8704E-09 3.1537E-11 0.0000E+00 10 -0.5810 -2.7474E-04 1.3077E-04 -1.5356E-05 -9.0441E-08 3.0100E-08 -5.5032E-10 0.0000E+00

[0264] Table 14

[0265] Example 8

[0266] like Figure 8 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a filter, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0267] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The filter has a first side surface S11 and a second side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging plane IMA.

[0268] In this example, the focal length F of the optical lens is 13.1955mm, the total length TTL of the optical lens is 35.5056mm, and the maximum field of view FOV of the optical lens is 25.0200°.

[0269] In this example, the second and third lenses are cemented lenses, so the second side surface of the second lens and the first side surface of the third lens are both S4. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S4 of the second lens is concave, and the first side surface S4 of the third lens is convex.

[0270] Table 15 shows the basic structural parameters of the optical lens in Example 8, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0271]

[0272]

[0273] Table 15

[0274] In this example, both the first lens and the fifth lens are aspherical lenses.

[0275] Table 16 shows the conic coefficient k and the coefficients of each higher order term that can be used for the surface of the aspherical lens in this example. The surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example 1.

[0276] 1 -0.5490 -9.8754E-05 -4.3690E-07 3.0442E-09 -3.4968E-11 2.1634E-12 -2.7560E-14 0.0000E+00 2 2.1500 -8.8966E-05 5.3305E-07 -1.1881E-08 3.1905E-10 9.9724E-14 -4.1819E-14 0.0000E+00 9 -1.3589 -2.5658E-05 -2.4057E-05 -1.4475E-06 3.3578E-09 7.3751E-10 -2.2563E-12 0.0000E+00 10 -0.6500 -8.2904E-04 8.0040E-05 -1.3604E-05 6.6940E-08 2.9686E-08 -9.1586E-10 0.0000E+00

[0277] Table 16

[0278] In summary, Examples 1 through 8 satisfy the relationships shown in Table 17.

[0279]

[0280]

[0281] Table 17

[0282] Table 18 gives the complete set of focal length values ​​F for the optical lenses of Examples 1 to 8, and the focal length values ​​F1 to F5 (unit: mm) for each lens.

[0283] F 13.5189 13.5449 13.7197 13.7768 14.6995 14.0000 13.2025 13.1955 FNO 0.9656 0.9675 0.9000 1.0000 0.8000 0.8000 0.9430 0.9425 ENPD 14.0000 14.0000 15.2441 13.7768 18.3744 17.5000 14.0000 14.0000 TTL 41.8026 42.0514 37.5923 38.3304 39.3595 33.3451 35.4123 35.5056 FOV 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 25.0200 θ 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 0.4367 H 5.7640 5.9694 5.6146 6.1697 6.3820 5.9115 5.8235 5.8412 D 16.4000 16.4000 16.6000 16.6000 16.4418 13.6372 16.4000 16.4000 BFL 6.9517 7.2659 6.5314 7.2877 8.0637 7.2751 5.4975 5.4987 F1 337.5203 337.5203 416.6623 422.7750 917.5196 515.7288 260.1453 191.6578 F2 -15.0325 -15.0171 -12.5865 -12.7283 -13.4188 -11.1424 -10.6483 -10.5592 F3 15.7245 15.7245 11.6736 11.8148 14.6619 12.1542 11.3882 11.4683 F4 21.4219 21.4183 38.2993 38.7066 18.9864 15.8634 17.6221 17.1479 F5 792.2671 1379.6872 174.3676 178.6641 -34.1498 -20.4458 -31.8439 -26.3954 d1 3.9879 3.9879 4.5576 4.5363 3.9366 3.3413 3.4986 3.4990 d4 10.7834 10.7834 12.5000 12.7494 11.5388 9.6011 9.8960 10.4964 d5 3.6376 3.6376 0.2688 0.2605 0.1024 0.0857 0.2317 0.1032 d6 10.1386 10.0000 4.9843 5.0398 9.3140 7.8171 10.4505 10.5673 d9 1.5444 1.5403 4.4864 4.4847 1.5875 1.3015 1.6263 1.5761 Vd2 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 36.3479 Vd3 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 63.4058 D4 17.8263 17.8449 15.4699 14.1132 16.2637 13.5000 13.4085 13.7607 D9 7.8787 7.9862 11.2308 10.3111 9.3451 8.7002 9.5565 9.6253 D10 6.7503 6.9171 7.7692 7.2253 7.2940 6.9388 7.9306 7.7136 SAG(S4) -2.2955 -2.3007 -0.5818 -0.4849 -1.9649 -1.6307 -1.0524 -1.1077 F23 66.7401 66.3884 32.3077 32.2660 59.8245 49.5816 57.1487 57.6014

[0284] Table 18

[0285] 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.

[0286] 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.

[0287] 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.

[0288] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens has five lenses, including: A first lens, having positive optical power, having a first convex surface on one side and a second concave surface on the other; The second lens has negative optical power, and both the first side surface and the second side surface of the second lens are concave. The third lens has positive optical power, and both the first side surface and the second side surface of the third lens are convex. A fourth lens having positive optical power, wherein at least one of the first side surface and the second side surface of the fourth lens is a convex surface; The fifth lens has optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave; The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 0.8 ≤ F / ENPD ≤ 1.5; The total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 12.9167≤TTL / H / θ≤20. The radius of curvature R9 of the first side surface of the fifth lens, the radius of curvature R10 of the second side surface of the fifth lens, and the center thickness d9 of the fifth lens satisfy the following condition: 0.5≤R9 / (R10+d9)≤1.

5.

2. The optical lens according to claim 1, characterized in that, Both the first side surface and the second side surface of the fourth lens are convex.

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

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

5. The optical lens according to claim 1, characterized in that, The fifth lens has positive optical power.

6. The optical lens according to claim 1, characterized in that, The fifth lens has negative optical power.

7. The optical lens according to claim 1, characterized in that, Both the first lens and the fourth lens are aspherical lenses.

8. The optical lens according to claim 1, characterized in that, Both the first lens and the fifth lens are aspherical lenses.

9. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is located between the fourth lens and the fifth lens.

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

11. The optical lens according to claim 1, characterized in that, The first side surface of the first lens and the second side surface of the fourth lens have inflection points.

12. The optical lens according to claim 1, characterized in that, The second lens and the third lens are cemented together to form a cemented lens.

13. The optical lens according to claim 12, characterized in that, The focal length F23 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: 2.3421≤F23 / F≤8.

14. The optical lens according to any one of claims 1 to 13, characterized in that, The air gap d5 between the third lens and the fourth lens and the total optical length TTL of the optical lens satisfy the following condition: 0.0026≤d5 / TTL≤0.

15.

15. The optical lens according to any one of claims 1 to 13, characterized in that, The center thickness d4 of the third lens and the total optical length TTL of the optical lens satisfy the following condition: 0.1≤d4 / TTL≤0.3326.

16. The optical lens according to any one of claims 1 to 13, characterized in that, The optical back focal length (BFL) and the optical total length (TTL) of the optical lens satisfy the following condition: 0.09 ≤ BFL / TTL ≤ 0.2182.

17. The optical lens according to any one of claims 1 to 13, characterized in that, The total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.0487≤F / ENPD / D≤0.

1.

18. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R1 of the first side of the first lens and the total focal length F of the optical lens satisfy the following condition: 0.8 ≤ R1 / F ≤ 2.

19. The optical lens according to any one of claims 1 to 13, characterized in that, The focal length F4 of the fourth lens and the total focal length F of the optical lens satisfy the following condition: 0.8≤F4 / F≤4.

20. The optical lens according to any one of claims 1 to 13, characterized in that, The total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.2≤(F*θ) / D≤0.4483.

21. The optical lens according to any one of claims 1 to 13, characterized in that, The Abbe number VD2 of the second lens and the Abbe number VD3 of the third lens satisfy the following condition: 80 ≤ VD2 + VD3 ≤ 99.7537.

22. The optical lens according to any one of claims 1 to 13, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.06≤D / H / F≤0.2155.

23. The optical lens according to any one of claims 1 to 13, characterized in that, 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: 1.2≤F / H≤3.

8.

24. The optical lens according to claim 1, characterized in that, The light-transmitting aperture D9 of the first side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 7.2≤D9*BFL / H≤13.0647.

25. The optical lens according to claim 1, characterized in that, The light-transmitting aperture D10 of the second side of the fifth lens, the optical back focal length BFL of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 5.5≤D10*BFL / H≤15.

26. The optical lens according to claim 1, characterized in that, The radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, and the center thickness d1 of the first lens satisfy the following condition: 0.49≤R1 / (R2+d1)≤1.

5.

27. The optical lens according to claim 1, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.1 ≤ F3 / F4 ≤ 1.

28. The optical lens according to claim 1, characterized in that, The focal length F5 of the fifth lens and the total focal length F of the optical lens satisfy the following condition: -11≤F5 / F≤150.

29. The optical lens according to claim 1, characterized in that, The sag SAG(S4) of the first side of the third lens and the aperture D4 of the first side of the third lens satisfy the following condition: -0.3≤arctan(SAG(S4) / D4)≤-0.0343.

30. The optical lens according to claim 1, characterized in that, The center thickness d6 of the fourth lens and the total optical length TTL of the optical lens satisfy the following condition: 0.07≤d6 / TTL≤0.2976.

31. The optical lens according to claim 1, characterized in that, The following conditions must be met: 2.3421≤F23 / F≤6, 0.6≤R9 / (R10+d9)≤1.3, 0.0026≤d5 / TTL≤0.1, 0.2≤d4 / TTL≤0.3326, 0.13≤BFL / TTL≤0.2182, 12.9167≤TTL / H / θ≤18, 0.8≤F / ENPD≤1.1, 0.0487≤F / ENPD / D≤0.08, 1≤R1 / F≤1.6, 1≤F4 / F≤3.5, 0.3≤(F*θ) / D≤0.4483, 90≤VD2+VD3≤99.7537, 0.1≤D / H / F≤0.2155, 1.7≤F / H≤2.9, 8≤D9*BFL / H≤13.0647, 6.8≤D10*BFL / H≤13, 0.6≤R1 / (R2+d1)≤1, 0.2≤F3 / F4≤0.8, -9≤F5 / F≤110, -0.2≤arctan(SAG(S4) / D4)≤-0.0343, 0.09≤d6 / TTL≤0.2976, wherein the focal length of the cemented lens formed by cementing the second lens and the third lens is F23, the focal length of the entire optical lens group is F, the radius of curvature of the first side of the fifth lens is R9, and the fifth lens... The second side surface of the lens has a radius of curvature of R10, the center thickness of the fifth lens is d9, the air gap between the third and fourth lenses is d5, the total optical length of the optical lens is TTL, the center thickness of the third lens is d4, the optical back focal length of the optical lens is BFL, the image height corresponding to the maximum field of view of the optical lens is H, the radian value of the maximum field of view of the optical lens is θ, the entrance pupil diameter of the optical lens is ENPD, the maximum aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens is D, the radius of curvature of the first side surface of the first lens is R1, and the focal length of the fourth lens is F4. The second lens has an Abbe number of VD2, the third lens has an Abbe number of VD3, the fifth lens has an aperture of D9 on its first side and an aperture of D10 on its second side, the first lens has a radius of curvature of R1 on its first side and an radius of curvature of R2 on its second side, the first lens has a center thickness of d1, the third lens has a focal length of F3, the fourth lens has a focal length of F4, the fifth lens has a focal length of F5, the third lens has a sagitta of SAG (S4) on its first side and an aperture of D4 on its first side, and the fourth lens has a center thickness of d6.

32. The optical lens according to claim 1, characterized in that, The following conditions must be met: 2.3421≤F23 / F≤4.9368, 0.6949≤R9 / (R10+d9)≤1.2126, 0.0026≤d5 / TTL≤0.0870, 0.2564≤d4 / TTL≤0.3326, 0.1549≤BFL / TTL≤0.2182, 12.9167≤TTL / H / θ≤16.6072, 0.8≤F / ENPD≤1.0, 0.0487≤F / ENPD / D≤0.0602, 1.0732≤R1 / F≤1.9349, 1.1331≤F4 / F≤2.8095, 0.3514≤(F*θ) / D ≤0.4483, 0.1648≤D / H / F≤0.2155, 2.2330≤F / H≤2.4436, 9.0215≤D9*BFL / H≤13.0647, 7.2613≤D10*BFL / H≤9.216, 0.7627≤R1 / (R2+d1)≤0.8652, 0.3048≤F3 / F4≤0.7722, -2.4120≤F5 / F≤101.8603, -0.1282≤arctan(SAG(S4) / D4)≤-0.0343, 0.1315≤d6 / TTL≤0.2976, wherein the adhesive formed by cementing the second lens and the third lens... The focal length of the combined lens is F23, the total focal length of the optical lens group is F, the radius of curvature of the first side of the fifth lens is R9, the radius of curvature of the second side of the fifth lens is R10, the center thickness of the fifth lens is d9, the air gap between the third and fourth lenses is d5, the total optical length of the optical lens is TTL, the center thickness of the third lens is d4, the optical back focal length of the optical lens is BFL, the image height corresponding to the maximum field of view of the optical lens is H, the radian value of the maximum field of view of the optical lens is θ, the entrance pupil diameter of the optical lens is ENPD, and the maximum field of view of the optical lens corresponds to the first side of the first lens. The large aperture is D, the radius of curvature of the first side of the first lens is R1, the focal length of the fourth lens is F4, the aperture of the first side of the fifth lens is D9, the aperture of the second side of the fifth lens is D10, the radius of curvature of the first side of the first lens is R1, the radius of curvature of the second side of the first lens is R2, the center thickness of the first lens is d1, the focal length of the third lens is F3, the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, the sag of the first side of the third lens is SAG (S4), the aperture of the first side of the third lens is D4, and the center thickness of the fourth lens is d6.

33. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 32 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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