Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with negative optical power, the first side of the first lens being a convex surface and the second side being a concave surface; a second lens with negative optical power, the first side of the second lens being a concave surface; a third lens with optical power; a fourth lens with optical power; a fifth lens with positive optical power, the first side of the fifth lens being a convex surface and the second side being a convex surface; a sixth lens with positive optical power, the first side of the sixth lens being a convex surface and the second side being a convex surface; a seventh lens with negative optical power, the first side of the seventh lens being a concave surface; an eighth lens with optical power; and a ninth lens with negative optical power. The application solves the problem that the optical lens in the prior art cannot simultaneously meet the requirements of high resolution, large aperture, low sensitivity, long back focal length, high light flux and confocal in the visible light range.

Description

Technical Field

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

[0002] With the continuous advancement of technology, optical imaging equipment is developing in a diversified direction and has been widely used in various display fields. Especially in the field of automotive driver assistance, advanced driver assistance / autonomous driving has gradually entered the public eye, and optical lenses, as core components, are facing increasing market demand and requirements.

[0003] Generally, optical lenses are used as front-view cameras for vehicles. These cameras require high resolution, typically around 8 megapixels. To maintain an aesthetically pleasing appearance, the installation location of automotive lenses is often concealed, resulting in a smaller overall size. Balancing miniaturization and high resolution becomes a challenge. The reduced overall size of automotive lenses also affects the amount of light entering the lens. Less light affects illumination, leading to darker images that fail to meet market demands. Furthermore, automotive lenses often have poor confocal performance across different wavelengths, resulting in significant axial chromatic aberration and hindering the achievement of high resolution.

[0004] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focus in the visible light range. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that existing optical lenses cannot simultaneously achieve high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focus in the visible light range.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following components in sequence: a first lens having negative optical power, wherein a first side surface of the first lens is convex and a second side surface is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave; a third lens having optical power; a fourth lens having optical power; a fifth lens having positive optical power, wherein a first side surface of the fifth lens is convex and a second side surface is convex; a sixth lens having positive optical power, wherein a first side surface of the sixth lens is convex and a second side surface is convex; a seventh lens having negative optical power, wherein a first side surface of the seventh lens is concave; an eighth lens having optical power; and a ninth lens having negative optical power.

[0007] Furthermore, the second side surface of the second lens is a convex surface.

[0008] Furthermore, the second side surface of the second lens is concave.

[0009] Furthermore, the third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

[0010] Furthermore, the third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

[0011] Furthermore, the third lens has positive optical power, and the first side of the third lens is convex, while the second side is concave.

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

[0013] Furthermore, the fourth lens has negative optical power, and its first side surface is concave while its second side surface is convex.

[0014] Furthermore, the second side surface of the seventh lens is concave.

[0015] Furthermore, the second side surface of the seventh lens is convex.

[0016] Furthermore, the eighth lens has positive optical power, and the first side of the eighth lens is convex and the second side is concave.

[0017] Furthermore, the eighth lens has negative optical power, and the first side of the eighth lens is concave and the second side is convex.

[0018] Furthermore, the first side surface of the ninth lens is concave, and the second side surface is convex.

[0019] Furthermore, the first side surface of the ninth lens is concave, and the second side surface is concave.

[0020] Furthermore, the first side surface of the ninth lens is convex, and the second side surface is concave.

[0021] Furthermore, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0022] Furthermore, the optical lens also includes an aperture stop, which is located between the second lens and the third lens, or between the third lens and the fourth lens.

[0023] Furthermore, the ninth lens is configured to be inverted, or the third lens is configured to be inverted.

[0024] Furthermore, the third and ninth lenses are aspherical lenses, or the fourth and ninth lenses are aspherical lenses.

[0025] Furthermore, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the following condition: 0.1≤R15 / R16≤3.

[0026] Furthermore, the radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -10≤R10 / R11≤-0.1.

[0027] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: 45 ≤ (F × FOV) / H ≤ 75.

[0028] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -20≤F2 / F≤-0.1.

[0029] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤2.

[0030] Furthermore, the air gap d11 between the fifth and sixth lenses satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: d11 / TTL≤0.2.

[0031] Furthermore, the radius of curvature R11 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.1≤R11 / F≤10.

[0032] 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: 0.01≤D / H / F≤0.5.

[0033] 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≤1.5.

[0034] Furthermore, the radius of curvature R15 of the first side of the eighth lens, the radius of curvature R16 of the second side of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.2≤R15 / (R16+d15)≤2.

[0035] Furthermore, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F≤3.6.

[0036] Furthermore, the light-transmitting aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.4≤D18 / H≤1.5.

[0037] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.1.

[0038] Furthermore, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3≤F6 / F≤2.

[0039] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3≤F5 / F≤3.

[0040] Furthermore, the optical back focal length of the optical lens, i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, BFL, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: BFL / TTL≤0.3.

[0041] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≤0.3.

[0042] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following in sequence: a first lens having negative optical power; a second lens having negative optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having negative optical power; an eighth lens having optical power; and a ninth lens having negative optical power; wherein the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F ≤ 3.6.

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

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

[0045] Furthermore, the first side surface of the second lens is concave, and the second side surface is concave.

[0046] Furthermore, the third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

[0047] Furthermore, the third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

[0048] Furthermore, the third lens has positive optical power, and the first side of the third lens is convex, while the second side is concave.

[0049] Furthermore, the fourth lens has positive optical power, and the first side of the fourth lens is convex and the second side is concave.

[0050] Furthermore, the fourth lens has negative optical power, and its first side surface is concave while its second side surface is convex.

[0051] Furthermore, the first side surface of the fifth lens is convex, and the second side surface is convex.

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

[0053] Furthermore, the first side surface of the seventh lens is concave, and the second side surface is concave.

[0054] Furthermore, the first side of the seventh lens is concave, and the second side is convex.

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

[0056] Furthermore, the eighth lens has negative optical power, and the first side of the eighth lens is concave and the second side is convex.

[0057] Furthermore, the first side surface of the ninth lens is concave, and the second side surface is convex.

[0058] Furthermore, the first side surface of the ninth lens is concave, and the second side surface is concave.

[0059] Furthermore, the first side surface of the ninth lens is convex, and the second side surface is concave.

[0060] Furthermore, the sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

[0061] Furthermore, the optical lens also includes an aperture stop, which is located between the second lens and the third lens, or between the third lens and the fourth lens.

[0062] Furthermore, the ninth lens is configured to be inverted, or the third lens is configured to be inverted.

[0063] Furthermore, the third and ninth lenses are aspherical lenses, or the fourth and ninth lenses are aspherical lenses.

[0064] Furthermore, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the following condition: 0.1≤R15 / R16≤3.

[0065] Furthermore, the radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -10≤R10 / R11≤-0.1.

[0066] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: 45 ≤ (F × FOV) / H ≤ 75.

[0067] Furthermore, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -20≤F2 / F≤-0.1.

[0068] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤2.

[0069] Furthermore, the air gap d11 between the fifth and sixth lenses satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: d11 / TTL≤0.2.

[0070] Furthermore, the radius of curvature R11 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.1≤R11 / F≤10.

[0071] 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: 0.01≤D / H / F≤0.5.

[0072] 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≤1.5.

[0073] Furthermore, the radius of curvature R15 of the first side of the eighth lens, the radius of curvature R16 of the second side of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.2≤R15 / (R16+d15)≤2.

[0074] Furthermore, the light-transmitting aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.4≤D18 / H≤1.5.

[0075] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.1.

[0076] Furthermore, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3≤F6 / F≤2.

[0077] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3≤F5 / F≤3.

[0078] Furthermore, the optical back focal length of the optical lens, i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, BFL, satisfies the following condition with respect to the optical total length of the optical lens, i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens: BFL / TTL≤0.3.

[0079] Furthermore, the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≤0.3.

[0080] According to another aspect of the present invention, an electronic device is provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0081] Applying the technical solution of this invention, the optical lens sequentially includes, from the first side to the second side, a first lens with negative optical power, a second lens with negative optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with optical power, and a ninth lens with negative optical power. The first lens has a convex first side and a concave second side; the second lens has a concave first side; the fifth lens has a convex first side and a convex second side; the sixth lens has a convex first side and a convex second side; and the seventh lens has a concave first side.

[0082] The first lens has negative optical power. Its first side is convex, and its second side is concave. The negative optical power and convex first side prevent excessive light divergence from the first side. The concave second side, combined with the convex first side, ensures a smooth transition of light path, facilitating control over the aperture of the rear lens and enabling miniaturization. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture. The meniscus design effectively increases light throughput. The convex first side of the first lens helps accelerate water droplet sliding, reducing its impact on image formation.

[0083] The second lens has negative optical power. The first side of the second lens is concave, and the second side of the second lens can be either convex or concave. When the second side of the second lens is convex, the second lens has negative optical power. The first side is concave, which can further diverge the light and ensure that more light passes through the aperture, increasing the light flux of the entire system. Combined with the convexity of the second side, the light can pass through the aperture more concentratedly, minimizing the difference between the edge field of view and the center illumination. When the second side of the second lens is concave, the second lens has negative optical power and a biconcave structure, which has a diverging effect on light. It can disperse the central and peripheral rays of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of aberrations between the peripheral and central rays to achieve high resolution. Under the same field of view, the light emitted from the second side of the first lens can provide a larger light receiving surface for the subsequent optical system, which can increase the physical aperture of the aperture, increase the amount of light entering, and increase the brightness of the image plane. The first side of the second lens is concave, which, in conjunction with the concave second side of the first lens, allows the light emitted from the second lens to be smoothly incident on the first side of the third lens. This facilitates a smooth light transition, reduces light energy loss, improves the illumination of the peripheral field of view, and changes the trend of peripheral rays, thereby reducing the front aperture of the optical lens, reducing its size, and contributing to miniaturization and cost reduction.

[0084] The optical power of the third lens can be either positive or negative. When the optical power of the third lens is positive, it converges the incident light rays, allowing as many rays as possible to enter the pupil and reducing light loss. When paired with a negative optical power second lens, this helps the light rays enter the rear lens more smoothly, improving resolution. When the optical power of the third lens is negative, it diverges the light rays. When paired with a negative optical power second lens, this also helps the light rays enter the rear lens more smoothly, improving resolution.

[0085] The optical power of the fourth lens can be positive or negative. When the optical power of the fourth lens is positive, it helps to collect and converge the light rays incident through the third lens, resulting in a smooth transition of light path. When the optical power of the fourth lens is negative, it helps to collect and diffuse the light rays incident through the third lens, resulting in a smooth transition of light path.

[0086] The fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is also convex. The fifth lens has positive optical power and a flat lens shape. The first side of the fifth lens is convex, which can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to enter smoothly into the rear, further making the light path transition smoothly, which is beneficial to reducing the aperture of the rear lens.

[0087] The sixth lens has positive optical power. Both its first and second sides are convex. As a positive lens in a cemented doublet, its biconvex shape and gentle curve further converge light, effectively reducing the aperture and barrel length of the rear system. Combined with the seventh lens, it can correct chromatic aberration. The second side of the fifth lens differs significantly in shape from the first side of the sixth lens, resulting in a significant alteration to the light trajectory. With the same aperture of the sixth lens, the front aperture of the optical lens can be reduced, achieving miniaturization.

[0088] The seventh lens has negative optical power. Its first side is concave, while its second side can be either concave or convex. When the second side is concave, the seventh lens has negative optical power, making it a negative lens in a cemented doublet. It diverges light rays, which helps correct aberrations between peripheral and central rays, achieving high resolution. Simultaneously, the concave first side of the seventh lens, combined with the convex second side of the sixth lens, facilitates a smooth light transition, reducing light loss and improving illumination in the peripheral field of view. It also alters the trajectory of peripheral rays, contributing to miniaturization and cost reduction. When the second side of the seventh lens is convex, it also has negative optical power. Its concave-convex structure and relatively smooth surface reduce lens sensitivity. The combination of the concave first side and convex second side ensures a smooth light transition, and light rays exiting the seventh lens do not significantly deflect when entering the eighth lens, effectively reducing light loss.

[0089] The optical power of the eighth lens can be positive or negative. When the optical power of the eighth lens is positive, it helps to collect and converge the light rays incident through the seventh lens, resulting in a smooth transition of light path. When the optical power of the eighth lens is negative, it helps to collect and diffuse the light rays incident through the seventh lens, resulting in a smooth transition of light path.

[0090] The ninth lens has negative optical power, causing light to diverge upwards. This allows light to accumulate rapidly at the image plane, expanding the imaging range. It also facilitates a smooth light transition with minimal refraction, ensuring the diverging light enters the chip smoothly. Furthermore, it allows as much large-angle light from the periphery as possible to smoothly transition to the rear optical system, correcting astigmatism and field curvature.

[0091] This application employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focal length in the visible light range. Attached Figure Description

[0092] 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:

[0093] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0094] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0095] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0096] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0097] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0098] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0099] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0100] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown;

[0101] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0102] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown.

[0103] The above figures include the following reference numerals:

[0104] 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; L3, Third Lens; L4, Fourth Lens; S8, First Side of Fourth Lens; S9, Second Side of Fourth Lens; L5, Fifth Lens; S10, First Side of Fifth Lens; S11, Second Side of Fifth Lens; L6, Sixth Lens; S12, First Side of Sixth Lens; S13, Second Side of Sixth Lens; L7, Seventh Lens; S13, First Side of Seventh Lens; S14, Second Side of Seventh Lens; L8, Eighth Lens; S15, First Side of Eighth Lens; S16, Second Side of Eighth Lens; L9, Ninth Lens; S17, First Side of Ninth Lens; S18, Second Side of Ninth Lens; S19, First Side of Protective Glass; S20, Second Side of Protective Glass; IMA, Imaging Surface. Detailed Implementation

[0105] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0106] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0107] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0108] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0109] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0110] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0111] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0112] In an exemplary embodiment, the optical lens provided in this application can be used as a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side and the right side is the image side; the first side is also the object side, and the second side is also the image side.

[0113] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitter lens.

[0114] To address the problem that existing optical lenses often fail to simultaneously achieve high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focus within the visible light range, this invention provides an optical lens and an electronic device.

[0115] Example 1

[0116] like Figures 1 to 10 As shown, the optical lens, from the first side to the second side, sequentially includes a first lens with negative optical power, a second lens with negative optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with optical power, and a ninth lens with negative optical power. The first side of the first lens is convex and the second side is concave; the first side of the second lens is concave; the first side of the fifth lens is convex and the second side is convex; the first side of the sixth lens is convex and the second side is convex; and the first side of the seventh lens is concave.

[0117] The first lens has negative optical power. Its first side is convex, and its second side is concave. The negative optical power and convex first side prevent excessive light divergence from the first side. The concave second side, combined with the convex first side, ensures a smooth transition of light path, facilitating control over the aperture of the rear lens and enabling miniaturization. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture. The meniscus design effectively increases light throughput. The convex first side of the first lens helps accelerate water droplet sliding, reducing its impact on image formation.

[0118] The second lens has negative optical power. The first side of the second lens is concave, and the second side of the second lens can be either convex or concave. When the second side of the second lens is convex, the second lens has negative optical power. The first side is concave, which can further diverge the light and ensure that more light passes through the aperture, increasing the light flux of the entire system. Combined with the convexity of the second side, the light can pass through the aperture more concentratedly, minimizing the difference between the edge field of view and the center illumination. When the second side of the second lens is concave, the second lens has negative optical power and a biconcave structure, which has a diverging effect on light. It can disperse the central and peripheral rays of each field of view, expand the aperture, increase the system illumination, and at the same time facilitate the correction of aberrations between the peripheral and central rays to achieve high resolution. Under the same field of view, the light emitted from the second side of the first lens can provide a larger light receiving surface for the subsequent optical system, which can increase the physical aperture of the aperture, increase the amount of light entering, and increase the brightness of the image plane. The first side of the second lens is concave, which, in conjunction with the concave second side of the first lens, allows the light emitted from the second lens to be smoothly incident on the first side of the third lens. This facilitates a smooth light transition, reduces light energy loss, improves the illumination of the peripheral field of view, and changes the trend of peripheral rays, thereby reducing the front aperture of the optical lens, reducing its size, and contributing to miniaturization and cost reduction.

[0119] The optical power of the third lens can be either positive or negative. When the optical power of the third lens is positive, it converges the incident light rays, allowing as many rays as possible to enter the pupil and reducing light loss. When paired with a negative optical power second lens, this helps the light rays enter the rear lens more smoothly, improving resolution. When the optical power of the third lens is negative, it diverges the light rays. When paired with a negative optical power second lens, this also helps the light rays enter the rear lens more smoothly, improving resolution.

[0120] The optical power of the fourth lens can be positive or negative. When the optical power of the fourth lens is positive, it helps to collect and converge the light rays incident through the third lens, resulting in a smooth transition of light path. When the optical power of the fourth lens is negative, it helps to collect and diffuse the light rays incident through the third lens, resulting in a smooth transition of light path.

[0121] The fifth lens has positive optical power. The first side of the fifth lens is convex, and the second side is also convex. The fifth lens has positive optical power and a flat lens shape. The first side of the fifth lens is convex, which can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to enter smoothly into the rear, further making the light path transition smoothly, which is beneficial to reducing the aperture of the rear lens.

[0122] The sixth lens has positive optical power. Both its first and second sides are convex. As a positive lens in a cemented doublet, its biconvex shape and gentle curve further converge light, effectively reducing the aperture and barrel length of the rear system. Combined with the seventh lens, it can correct chromatic aberration. The second side of the fifth lens differs significantly in shape from the first side of the sixth lens, resulting in a significant alteration to the light trajectory. With the same aperture of the sixth lens, the front aperture of the optical lens can be reduced, achieving miniaturization.

[0123] The seventh lens has negative optical power. Its first side is concave, while its second side can be either concave or convex. When the second side is concave, the seventh lens has negative optical power, making it a negative lens in a cemented doublet. It diverges light rays, which helps correct aberrations between peripheral and central rays, achieving high resolution. Simultaneously, the concave first side of the seventh lens, combined with the convex second side of the sixth lens, facilitates a smooth light transition, reducing light loss and improving illumination in the peripheral field of view. It also alters the trajectory of peripheral rays, contributing to miniaturization and cost reduction. When the second side of the seventh lens is convex, it also has negative optical power. Its concave-convex structure and relatively smooth surface reduce lens sensitivity. The combination of the concave first side and convex second side ensures a smooth light transition, and light rays exiting the seventh lens do not significantly deflect when entering the eighth lens, effectively reducing light loss.

[0124] The optical power of the eighth lens can be positive or negative. When the optical power of the eighth lens is positive, it helps to collect and converge the light rays incident through the seventh lens, resulting in a smooth transition of light path. When the optical power of the eighth lens is negative, it helps to collect and diffuse the light rays incident through the seventh lens, resulting in a smooth transition of light path.

[0125] The ninth lens has negative optical power, causing light to diverge upwards. This allows light to accumulate rapidly at the image plane, expanding the imaging range. It also facilitates a smooth light transition with minimal refraction, ensuring the diverging light enters the chip smoothly. Furthermore, it allows as much large-angle light from the periphery as possible to smoothly transition to the rear optical system, correcting astigmatism and field curvature.

[0126] This application employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focal length in the visible light range.

[0127] In this embodiment, the second side surface of the second lens is convex. The second lens has negative optical power, and the first side surface is concave, which can further diverge the light, expand the light aperture, ensure that more light passes through the aperture, increase the light flux of the entire system, and, combined with the convex surface of the second side surface, allow the light to pass through the aperture more concentratedly, minimizing the difference between the edge field of view and the center illumination.

[0128] In this embodiment, the second side surface of the second lens is concave. The second lens has negative optical power and a biconcave structure, which has a diverging effect on light, dispersing the central and peripheral rays of each field of view, increasing the aperture diameter, increasing system illumination, and facilitating the correction of aberrations between the central and peripheral rays to achieve high resolution. Under the same field of view, the light emitted from the second side surface of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the image plane. The first side surface of the second lens is concave, which, in conjunction with the concave surface of the second side surface of the first lens, allows the light emitted from the second lens to smoothly enter the first side surface of the third lens, facilitating a smooth light transition, reducing light energy loss, improving the illumination of the peripheral field of view, and changing the trajectory of the peripheral rays, thereby reducing the front aperture of the optical lens, reducing its size, and contributing to miniaturization and cost reduction.

[0129] In this embodiment, the third lens has positive optical power, and both its first and second sides are convex. The positive optical power of the third lens converges incident light rays, allowing as much light as possible to enter the pupil and reducing light loss. Combined with the negative optical power of the second lens, this facilitates smoother light entry into the rear lens, improving resolution. The convex first side of the third lens alters the trajectory of peripheral light rays, effectively reducing the front aperture of the optical lens and thus its size, which is beneficial for miniaturization and cost reduction.

[0130] In this embodiment, the third lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the third lens diverges light rays, which, combined with the positive optical power of the second lens, facilitates smoother light entry into the rear lens, improving resolution. Simultaneously, the concave first side of the third lens alters the trajectory of edge light rays, reducing the front aperture of the optical lens and decreasing its size, thus contributing to miniaturization and cost reduction.

[0131] In this embodiment, the third lens has positive optical power, and its first side surface is convex while its second side surface is concave. The positive optical power and concave shape of the second side surface of the third lens facilitate smoothing the light path from the rear lens. The light emitted from the second lens is well received by the third lens, and the light path is altered, resulting in a smoother light path for the rear system.

[0132] In this embodiment, the fourth lens has positive optical power. The first side of the fourth lens is convex, and the second side is concave. The convex shape of the fourth lens, combined with the concave second side of the third lens, facilitates the collection and proper convergence of light rays incident through the third lens, resulting in a smooth transition of light path. Furthermore, the significant difference in shape between the second side of the third lens and the first side of the fourth lens allows the fourth lens to significantly alter the light path, enabling a reduction in the front aperture of the optical lens and achieving miniaturization.

[0133] In this embodiment, the fourth lens has negative optical power, a concave first side, and a convex second side. The fourth lens has negative optical power and a gently sloping shape. The concave first side expands the angle of incident light, increasing the brightness of the imaging surface. The concave first side and convex second side of the fourth lens achieve a smooth transition of light, allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens.

[0134] In this embodiment, the second side surface of the seventh lens is concave. The seventh lens has negative optical power and is the negative lens in a cemented doublet. It has a diverging effect on light, which is beneficial for correcting aberrations between peripheral and central rays, achieving high resolution. Simultaneously, the concave first side surface of the seventh lens, in conjunction with the convex second side surface of the sixth lens, facilitates a smoother light transition, reduces light energy loss, improves illumination in the peripheral field of view, and alters the trajectory of peripheral rays, contributing to miniaturization and cost reduction.

[0135] In this embodiment, the second side surface of the seventh lens is convex. The seventh lens has negative optical power, a concave-convex structure, and a relatively flat surface, which helps to reduce the sensitivity of the lens. The first side surface of the seventh lens is concave, which, together with the convex surface of the second side surface, makes the light transition smooth. The light emitted from the seventh lens enters the eighth lens without significant deflection, which can effectively reduce the loss of light flux.

[0136] In this embodiment, the eighth lens has positive optical power, with a convex first side and a concave second side. The convex first side of the eighth lens connects to the concave second side of the seventh lens, ensuring that the light rays travel in roughly the same direction on both sides, resulting in minimal light refraction. This effectively reduces light loss due to inter-lens reflections and improves the illumination of the imaging plane. The concave second side of the eighth lens facilitates a longer back focal length for telephoto lenses. The relatively flat surface of the eighth lens also helps reduce sensitivity.

[0137] In this embodiment, the eighth lens has negative optical power, and its first side surface is concave while its second side surface is convex. Controlling the surface shape of the eighth lens, with its first side surface being concave and its second side surface being convex, results in a relatively smooth surface shape, which helps to reduce the low sensitivity of the telephoto lens.

[0138] In this embodiment, the first side of the ninth lens is concave, and the second side is convex. The ninth lens adopts an aspherical surface design, which can effectively balance chromatic aberration, limit astigmatism, and improve resolution. It allows as much peripheral large-angle light as possible to smoothly transition to the rear optical system, correcting astigmatism and field curvature.

[0139] In this embodiment, the first side surface of the ninth lens is concave, and the second side surface is also concave. The ninth lens has negative optical power and a double-concave structure. The concave surface of the first side surface receives light from the eighth lens, allowing for a smooth transition of light without significant refraction, and ensuring that the diverging light rays enter the chip smoothly. The ninth lens is an aspherical lens, which can effectively correct various aberrations and improve resolving power.

[0140] In this embodiment, the first side surface of the ninth lens is convex, and the second side surface is concave. The second side surface of the ninth lens is concave and has a large radius of curvature, resulting in a relatively flat surface. This minimizes the impact on the light trajectory after passing through the second side surface of the ninth lens, which is beneficial for achieving a small CRA (Current Radiation Amplitude). The ninth lens has a negative optical power, and the concave second side surface causes the light rays to diverge upwards after passing through it, allowing for rapid accumulation of light on the imaging surface and thus expanding the imaging range.

[0141] In this embodiment, the sixth and seventh lenses are cemented together to form a cemented doublet lens. This allows light rays from the front lens to smoothly transition to the rear optical system, reducing the overall length of the optical lens. This enables the various aberrations of the optical system to be fully corrected, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. By using a cemented doublet lens, the air gap between the two lenses can be reduced, decreasing the overall system length; the chromatic aberration of the two lenses is complementary, which helps reduce chromatic aberration and improve image quality; at the same time, it reduces the number of assembly components between the two lenses, reducing processes and lowering costs; furthermore, it can reduce field curvature, which can correct off-axis point aberrations of the system. It also allows for reasonable focal length allocation, which helps achieve thermal compensation and obtain good temperature performance.

[0142] In this embodiment, the optical lens also includes an aperture stop, which is located between the second lens and the third lens, or between the third lens and the fourth lens. This arrangement facilitates effective light convergence entering the optical system, reduces the lens aperture at the rear end of the optical system, and lowers the system's assembly sensitivity.

[0143] In this embodiment, either the ninth lens or the third lens is inverted. Inversion helps to balance aberrations and improve resolution.

[0144] In this embodiment, the third and ninth lenses are aspherical lenses, or the fourth and ninth lenses are aspherical lenses. Using at least two aspherical lenses is beneficial for correcting system aberrations and improving resolving power.

[0145] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the condition: 0.1 ≤ R15 / R16 ≤ 3. Satisfying this condition results in a relatively flat surface of the eighth lens, which is beneficial for reducing the low sensitivity of the telephoto lens. Preferably, 0.2 ≤ R15 / R16 ≤ 2.

[0146] In this embodiment, the radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -10 ≤ R10 / R11 ≤ -0.1. By rationally configuring the radius of curvature of the fifth lens, the light collected by the fourth lens is prevented from diverging excessively, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves the system's imaging quality. Preferably, -5 ≤ R10 / R11 ≤ -0.6.

[0147] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 45 ≤ (F × FOV) / H ≤ 75. Satisfying this condition allows for both telephoto and wide-angle resolution. Preferably, 50 ≤ (F × FOV) / H ≤ 60. The maximum field of view (FOV) is related to the image height (H), representing the field of view corresponding to that image height.

[0148] In this embodiment, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -20 ≤ F2 / F ≤ -0.1. By rationally allocating the focal length of the second lens, light can enter the rear optical system smoothly, which is beneficial for light collection, ensuring light transmission, and improving resolution. Preferably, -15 ≤ F2 / F ≤ -0.6.

[0149] 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 relationship: F / ENPD ≤ 2. A smaller FNO is beneficial for increasing light transmission, while a larger entrance pupil diameter helps improve relative illumination. Preferably, F / ENPD ≤ 1.8.

[0150] In this embodiment, the air gap d11 between the fifth and sixth lenses satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens: d11 / TTL ≤ 0.2. Controlling the air gap between the fifth and sixth lenses ensures that the outgoing light rays are well received by the cemented doublet lens, with no significant light refraction, reducing light energy loss at the edges, and improving the system's resolution. Preferably, d11 / TTL ≤ 0.1.

[0151] In this embodiment, the radius of curvature R11 of the second side surface of the fifth lens and the total focal length F of the optical lens satisfy the following relationship: 0.1 ≤ R11 / F ≤ 10. When the ratio of the radius of curvature of the second side surface of the fifth lens to the total focal length F of the optical lens is within the control range, it can help smooth the light path, especially the light at the edge of the field of view, which can better correct aberrations, improve image quality, and achieve high resolution. Preferably, 0.2 ≤ R11 / F ≤ 8.

[0152] 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: 0.01 ≤ D / H / F ≤ 0.5. Under the condition of a fixed focal length, this provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, 0.02 ≤ D / H / F ≤ 0.35.

[0153] 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 ≤ 1.5. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, 0.4 ≤ (F*θ) / D ≤ 1.

[0154] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens, the radius of curvature R16 of the second side surface of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.2 ≤ R15 / (R16+d15) ≤ 2. By controlling the radius of curvature of the two sides and the center thickness of the eighth lens, the special lens shape setting creates an optical path difference between the peripheral light rays and the central light rays, diverging the central light rays and allowing them to enter the rear optical system. This also reduces the rear aperture of the optical lens, decreasing its size and facilitating miniaturization and cost reduction. Preferably, 0.4 ≤ R15 / (R16+d15) ≤ 1.5.

[0155] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F ≤ 3.6. By controlling the total optical length and focal length of the optical lens within this range, it is beneficial to ensure good resolution while achieving miniaturization. Preferably, TTL / F ≤ 3.2.

[0156] In this embodiment, the aperture D18 of the second side of the ninth lens satisfies the condition 0.4 ≤ D18 / H ≤ 1.5 with respect to the image height H corresponding to the maximum field of view of the optical lens. Under the condition of the same imaging surface and image height, a larger aperture of the second side of the last lens is beneficial for the principal ray to exit parallel onto the imaging surface, thus facilitating the achievement of a small CRA (Current Radiation Aspect Ratio). Preferably, 0.6 ≤ D18 / H ≤ 1.2.

[0157] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10 ≤ F6 / F7 ≤ -0.1. Under visible light and single-wavelength (R, G, B) operating environments, the optical lenses have similar focal lengths, achieving cofocal switching between wide-band visible light and single-wavelength (R, G, B) applications. Preferably, -5 ≤ F6 / F7 ≤ -0.5.

[0158] In this embodiment, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3 ≤ F6 / F ≤ 2. By rationally allocating the ratio of the focal length of the sixth lens to the total focal length, the height of edge rays is compressed, and the axial chromatic aberration of different wavelengths is controlled, which is beneficial to improving confocal performance. Preferably, 0.6 ≤ F6 / F ≤ 1.5.

[0159] 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: 0.3 ≤ F5 / F ≤ 3. By rationally allocating the ratio of the focal length of the fifth lens to the total focal length, the height of edge rays is compressed, and the axial chromatic aberration of different wavelengths is controlled, which is beneficial to improving confocal performance. Preferably, 0.5 ≤ F5 / F ≤ 2.

[0160] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TTL ≤ 0.3 with respect to the total optical length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane. This condition satisfies the special requirements for the back focal length of the optical lens and also provides space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, BFL / TTL ≤ 0.1.

[0161] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TL ≤ 0.3 with respect to the lens group length of the optical lens (i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens). Satisfying this condition allows for miniaturization while maintaining a longer back focal length, which is beneficial for module assembly. Preferably, BFL / TL ≤ 0.1.

[0162] Example 2

[0163] like Figures 1 to 10 As shown, the optical lens, from the first side to the second side, sequentially includes: a first lens with negative optical power; a second lens with negative optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with negative optical power; an eighth lens with optical power; and a ninth lens with negative optical power. The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F ≤ 3.6. By controlling the total optical length and focal length of the optical lens within this range, it is beneficial to ensure good resolution while achieving miniaturization. Preferably, TTL / F ≤ 3.2.

[0164] In this embodiment, the first side of the first lens is convex, and the second side is concave. The first lens has negative optical power. The convex first side prevents excessive divergence of light from the first side. The concave second side of the first lens, combined with the convex first side, ensures a smooth transition of light path, which is beneficial for controlling the aperture of the rear lens and facilitating miniaturization design. The first lens preferably uses a high refractive index material, which helps to reduce the front aperture. The meniscus design effectively increases the light throughput. The convex first side of the first lens helps to accelerate the sliding of water droplets and reduce their impact on imaging.

[0165] In this embodiment, the first side of the second lens is concave, and the second side is convex. The second lens has negative optical power. The concave first side can further diverge the light, ensuring that more light passes through the aperture and increasing the luminous flux of the entire system. Combined with the convex second side, the light can pass through the aperture more concentratedly, minimizing the difference between the edge field of view and the center illumination.

[0166] In this embodiment, both the first and second sides of the second lens are concave. The second lens has negative optical power and a biconcave structure, which diverges light, separating the central and peripheral rays of each field of view, thus increasing the aperture and system illumination. It also facilitates the correction of aberrations between the central and peripheral rays, achieving high resolution. Under the same field of view, the light emitted from the second side of the first lens provides a larger light-receiving surface for the subsequent optical system, allowing for a larger aperture and greater light intake, thus increasing image brightness. The concave first side of the second lens, combined with the concave second side of the first lens, ensures a smooth transition of light to the first side of the third lens, reducing light loss and improving illumination in the peripheral field of view. Furthermore, it alters the trajectory of peripheral rays, reducing the front diameter of the optical lens, thus minimizing its size and contributing to miniaturization and cost reduction.

[0167] In this embodiment, the third lens has positive optical power, and both its first and second sides are convex. The positive optical power of the third lens converges incident light rays, allowing as much light as possible to enter the pupil and reducing light loss. Combined with the negative optical power of the second lens, this facilitates smoother light entry into the rear lens, improving resolution. The convex first side of the third lens alters the trajectory of peripheral light rays, effectively reducing the front aperture of the optical lens and thus its size, which is beneficial for miniaturization and cost reduction.

[0168] In this embodiment, the third lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the third lens diverges light rays, which, combined with the positive optical power of the second lens, facilitates smoother light entry into the rear lens, improving resolution. Simultaneously, the concave first side of the third lens alters the trajectory of edge light rays, reducing the front aperture of the optical lens and decreasing its size, thus contributing to miniaturization and cost reduction.

[0169] In this embodiment, the third lens has positive optical power, and its first side surface is convex while its second side surface is concave. The positive optical power and concave shape of the second side surface of the third lens facilitate smoothing the light path from the rear lens. The light emitted from the second lens is well received by the third lens, and the light path is altered, resulting in a smoother light path for the rear system.

[0170] In this embodiment, the fourth lens has positive optical power. The first side of the fourth lens is convex, and the second side is concave. The convex shape of the fourth lens, combined with the concave second side of the third lens, facilitates the collection and proper convergence of light rays incident through the third lens, resulting in a smooth transition of light path. Furthermore, the significant difference in shape between the second side of the third lens and the first side of the fourth lens allows the fourth lens to significantly alter the light path, enabling a reduction in the front aperture of the optical lens and achieving miniaturization.

[0171] In this embodiment, the fourth lens has negative optical power, a concave first side, and a convex second side. The fourth lens has negative optical power and a gently sloping shape. The concave first side expands the angle of incident light, increasing the brightness of the imaging surface. The concave first side and convex second side of the fourth lens achieve a smooth transition of light, allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens.

[0172] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. The fifth lens has positive optical power and a gently sloping shape. The convex shape of the first side surface of the fifth lens can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to smoothly enter the rear, further smoothing the light path and helping to reduce the aperture of the rear lens.

[0173] In this embodiment, both the first and second sides of the sixth lens are convex. The sixth lens has positive optical power, is a positive lens in a cemented doublet, and has a biconvex shape with a gentle curve, which further converges light, effectively reducing the aperture and barrel length of the rear system. Combined with the seventh lens, it can correct chromatic aberration in the system. The second side of the fifth lens differs significantly in shape from the first side of the sixth lens, resulting in a significant change in the light trajectory of the sixth lens. With the same aperture of the sixth lens, the front aperture of the optical lens can be reduced, achieving miniaturization.

[0174] In this embodiment, both the first and second sides of the seventh lens are concave. The seventh lens has negative optical power, making it a negative lens in a cemented doublet. It diverges light rays, which helps correct aberrations between peripheral and central rays, achieving high resolution. Simultaneously, the concave first side of the seventh lens, combined with the convex second side of the sixth lens, facilitates a smoother light transition, reducing light loss and improving illumination in the peripheral field of view. Furthermore, it alters the trajectory of peripheral rays, contributing to miniaturization and cost reduction.

[0175] In this embodiment, the first side of the seventh lens is concave, and the second side is convex. The seventh lens has negative optical power, a concave-convex structure, and a relatively flat surface, which helps to reduce the sensitivity of the lens. The combination of the concave first side and the convex second side of the seventh lens makes the light transition smooth. The light emitted from the seventh lens enters the eighth lens without significant deflection, which can effectively reduce the loss of light flux.

[0176] In this embodiment, the eighth lens has positive optical power, with a convex first side and a concave second side. The convex first side of the eighth lens connects to the concave second side of the seventh lens, ensuring that the light rays travel in roughly the same direction on both sides, resulting in minimal light refraction. This effectively reduces light loss due to inter-lens reflections and improves the illumination of the imaging plane. The concave second side of the eighth lens facilitates a longer back focal length for telephoto lenses. The relatively flat surface of the eighth lens also helps reduce sensitivity.

[0177] In this embodiment, the eighth lens has negative optical power, and its first side surface is concave while its second side surface is convex. Controlling the surface shape of the eighth lens, with its first side surface being concave and its second side surface being convex, results in a relatively smooth surface shape, which helps to reduce the low sensitivity of the telephoto lens.

[0178] In this embodiment, the first side of the ninth lens is concave, and the second side is convex. The ninth lens adopts an aspherical surface design, which can effectively balance chromatic aberration, limit astigmatism, and improve resolution. It allows as much peripheral large-angle light as possible to smoothly transition to the rear optical system, correcting astigmatism and field curvature.

[0179] In this embodiment, the first side surface of the ninth lens is concave, and the second side surface is also concave. The ninth lens has negative optical power and a double-concave structure. The concave surface of the first side surface receives light from the eighth lens, allowing for a smooth transition of light without significant refraction, and ensuring that the diverging light rays enter the chip smoothly. The ninth lens is an aspherical lens, which can effectively correct various aberrations and improve resolving power.

[0180] In this embodiment, the first side surface of the ninth lens is convex, and the second side surface is concave. The second side surface of the ninth lens is concave and has a large radius of curvature, resulting in a relatively flat surface. This minimizes the impact on the light trajectory after passing through the second side surface of the ninth lens, which is beneficial for achieving a small CRA (Current Radiation Amplitude). The ninth lens has a negative optical power, and the concave second side surface causes the light rays to diverge upwards after passing through it, allowing for rapid accumulation of light on the imaging surface and thus expanding the imaging range.

[0181] This application employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this invention has at least one beneficial effect, such as high resolution, large aperture, low sensitivity, long back focal length, high light throughput, and confocal focal length in the visible light range.

[0182] In this embodiment, the sixth and seventh lenses are cemented together to form a cemented doublet lens. This allows light rays from the front lens to smoothly transition to the rear optical system, reducing the overall length of the optical lens. This enables the various aberrations of the optical system to be fully corrected, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. By using a cemented doublet lens, the air gap between the two lenses can be reduced, decreasing the overall system length; the chromatic aberration of the two lenses is complementary, which helps reduce chromatic aberration and improve image quality; at the same time, it reduces the number of assembly components between the two lenses, reducing processes and lowering costs; furthermore, it can reduce field curvature, which can correct off-axis point aberrations of the system. It also allows for reasonable focal length allocation, which helps achieve thermal compensation and obtain good temperature performance.

[0183] In this embodiment, the optical lens also includes an aperture stop, which is located between the second lens and the third lens, or between the third lens and the fourth lens. This arrangement facilitates effective light convergence entering the optical system, reduces the lens aperture at the rear end of the optical system, and lowers the system's assembly sensitivity.

[0184] In this embodiment, either the ninth lens or the third lens is inverted. Inversion helps to balance aberrations and improve resolution.

[0185] In this embodiment, the third and ninth lenses are aspherical lenses, or the fourth and ninth lenses are aspherical lenses. Using at least two aspherical lenses is beneficial for correcting system aberrations and improving resolving power.

[0186] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the condition: 0.1 ≤ R15 / R16 ≤ 3. Satisfying this condition results in a relatively flat surface of the eighth lens, which is beneficial for reducing the low sensitivity of the telephoto lens. Preferably, 0.2 ≤ R15 / R16 ≤ 2.

[0187] In this embodiment, the radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -10 ≤ R10 / R11 ≤ -0.1. By rationally configuring the radius of curvature of the fifth lens, the light collected by the fourth lens is prevented from diverging excessively, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves the system's imaging quality. Preferably, -5 ≤ R10 / R11 ≤ -0.6.

[0188] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 45 ≤ (F × FOV) / H ≤ 75. Satisfying this condition allows for both telephoto and wide-angle resolution. Preferably, 50 ≤ (F × FOV) / H ≤ 60. The maximum field of view (FOV) is related to the image height (H), representing the field of view corresponding to that image height.

[0189] In this embodiment, the focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -20 ≤ F2 / F ≤ -0.1. By rationally allocating the focal length of the second lens, light can enter the rear optical system smoothly, which is beneficial for light collection, ensuring light transmission, and improving resolution. Preferably, -15 ≤ F2 / F ≤ -0.6.

[0190] 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 relationship: F / ENPD ≤ 2. A smaller FNO is beneficial for increasing light transmission, while a larger entrance pupil diameter helps improve relative illumination. Preferably, F / ENPD ≤ 1.8.

[0191] In this embodiment, the air gap d11 between the fifth and sixth lenses satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens: d11 / TTL ≤ 0.2. Controlling the air gap between the fifth and sixth lenses ensures that the outgoing light rays are well received by the cemented doublet lens, with no significant light refraction, reducing light energy loss at the edges, and improving the system's resolution. Preferably, d11 / TTL ≤ 0.1.

[0192] In this embodiment, the radius of curvature R11 of the second side surface of the fifth lens and the total focal length F of the optical lens satisfy the following relationship: 0.1 ≤ R11 / F ≤ 10. When the ratio of the radius of curvature of the second side surface of the fifth lens to the total focal length F of the optical lens is within the control range, it can help smooth the light path, especially the light at the edge of the field of view, which can better correct aberrations, improve image quality, and achieve high resolution. Preferably, 0.2 ≤ R11 / F ≤ 8.

[0193] 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: 0.01 ≤ D / H / F ≤ 0.5. Under the condition of a fixed focal length, this provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, 0.02 ≤ D / H / F ≤ 0.35.

[0194] 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 ≤ 1.5. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, 0.4 ≤ (F*θ) / D ≤ 1.

[0195] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens, the radius of curvature R16 of the second side surface of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.2 ≤ R15 / (R16+d15) ≤ 2. By controlling the radius of curvature of the two sides and the center thickness of the eighth lens, the special lens shape setting creates an optical path difference between the peripheral light rays and the central light rays, diverging the central light rays and allowing them to enter the rear optical system. This also reduces the rear aperture of the optical lens, decreasing its size and facilitating miniaturization and cost reduction. Preferably, 0.4 ≤ R15 / (R16+d15) ≤ 1.5.

[0196] In this embodiment, the aperture D18 of the second side of the ninth lens satisfies the condition 0.4 ≤ D18 / H ≤ 1.5 with respect to the image height H corresponding to the maximum field of view of the optical lens. Under the condition of the same imaging surface and image height, a larger aperture of the second side of the last lens is beneficial for the principal ray to exit parallel onto the imaging surface, thus facilitating the achievement of a small CRA (Current Radiation Aspect Ratio). Preferably, 0.6 ≤ D18 / H ≤ 1.2.

[0197] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10 ≤ F6 / F7 ≤ -0.1. Under visible light and single-wavelength (R, G, B) operating environments, the optical lenses have similar focal lengths, achieving cofocal switching between wide-band visible light and single-wavelength (R, G, B) applications. Preferably, -5 ≤ F6 / F7 ≤ -0.5.

[0198] In this embodiment, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3 ≤ F6 / F ≤ 2. By rationally allocating the ratio of the focal length of the sixth lens to the total focal length, the height of edge rays is compressed, and the axial chromatic aberration of different wavelengths is controlled, which is beneficial to improving confocal performance. Preferably, 0.6 ≤ F6 / F ≤ 1.5.

[0199] 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: 0.3 ≤ F5 / F ≤ 3. By rationally allocating the ratio of the focal length of the fifth lens to the total focal length, the height of edge rays is compressed, and the axial chromatic aberration of different wavelengths is controlled, which is beneficial to improving confocal performance. Preferably, 0.5 ≤ F5 / F ≤ 2.

[0200] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TTL ≤ 0.3 with respect to the total optical length of the optical lens (TTL), i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the imaging plane. This condition satisfies the special requirements for the back focal length of the optical lens and also provides space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, BFL / TTL ≤ 0.1.

[0201] In this embodiment, the optical back focal length (BFL), i.e., the distance from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfies the condition that BFL / TL ≤ 0.3 with respect to the lens group length of the optical lens (i.e., the distance from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens). Satisfying this condition allows for miniaturization while maintaining a longer back focal length, which is beneficial for module assembly. Preferably, BFL / TL ≤ 0.1.

[0202] Optionally, the optical lens may also include a filter located on the second side of the ninth lens and a protective glass for protecting the photosensitive element located on the imaging plane.

[0203] The optical lens in this application can employ multiple lenses, such as the nine lenses mentioned above. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when image quality is a primary concern. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. Using aspherical lenses can minimize aberrations that occur during imaging, thereby improving image quality.

[0204] In this exemplary embodiment, the solution is not limited to using plastic or glass for the lenses. If temperature performance is a primary concern, the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth 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 disruption to the normal use of the optical lens. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolving quality and reliability are of primary concern, the first to ninth lenses can all be aspherical glass lenses. Of course, in applications where temperature stability requirements are lower, the first to ninth lenses in the optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to ninth lenses in the optical lens can also be made of a combination of plastic and glass.

[0205] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0206] 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 nine lenses are described as an example in the embodiments, the optical lens is not limited to including nine lenses. If necessary, the optical lens may also include other numbers of lenses.

[0207] 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.

[0208] It should be noted that any of the examples one through ten below are applicable to all embodiments of this application.

[0209] Example 1

[0210] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0211] like Figure 1 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0212] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is convex, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0213] In this example, the total effective focal length F of the optical lens is 21.286mm, the total length TTL of the optical lens is 64.011mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0214] In this example, both the first side surface S17 and the second side surface S18 of the ninth lens are curved.

[0215] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0216] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0217]

[0218]

[0219] Table 1

[0220] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0221]

[0222] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A, B, C, D, E, F, and G are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example 1.

[0223]

[0224] Table 2

[0225] Example 2

[0226] like Figure 2 The diagram shown is a schematic representation of the optical lens structure in Example 2. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples.

[0227] like Figure 2 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0228] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is convex, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0229] In this example, the total effective focal length F of the optical lens is 21.260mm, the total length TTL of the optical lens is 63.799mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0230] In this example, both the first side surface S17 and the second side surface S18 of the ninth lens are curved.

[0231] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0232] 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).

[0233] Surf Radius Thickness Nd Vd 1 19.660 5.340 2.00 25.44 2 14.170 8.300 3 -18.410 4.430 1.92 18.90 4 -37.360 0.400 STO Infinity 0.250 6 79.870 6.130 1.99 16.48 7 -200.000 0.780 8 16.690 4.910 1.81 41.00 9 20.440 4.390 10 19.210 5.190 1.44 95.10 11 -21.690 0.100 12 23.250 3.420 1.62 63.40 13 -20.860 4.040 1.85 23.79 14 15.920 0.920 15 15.790 6.310 1.99 16.48 16 24.400 4.310 17 44.340 1.079 1.59 61.12 18 17.960 1.000 19 Infinity 0.500 1.52 64.21 20 Infinity 2.000 IMA / /

[0234] Table 3

[0235] Table 4 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example 2.

[0236]

[0237] Table 4

[0238] Example 3

[0239] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0240] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface of protective glass S19, second side surface of protective glass S10, and imaging surface IMA.

[0241] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0242] In this example, the total effective focal length F of the optical lens is 21.673mm, the total length TTL of the optical lens is 61.042mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0243] In this example, both the third lens L3 and the ninth lens L9 are aspherical lenses.

[0244] 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).

[0245]

[0246]

[0247] Table 5

[0248] Table 6 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S5, S6, S17, and S18 in Example 3.

[0249]

[0250] Table 6

[0251] Example 4

[0252] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0253] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface of protective glass S19, second side surface of protective glass S10, and imaging surface IMA.

[0254] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0255] In this example, the total effective focal length F of the optical lens is 21.618mm, the total length TTL of the optical lens is 60.940mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0256] In this example, the second side surface S18 of the ninth lens is set to be inverted.

[0257] In this example, both the third lens L3 and the ninth lens L9 are aspherical lenses.

[0258] 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).

[0259] Surf Radius Thickness Nd Vd 1 17.770 5.740 2.00 25.44 2 13.980 6.790 3 -23.210 6.500 2.00 25.44 4 150.000 0.460 5 26.820 5.500 1.81 41.00 6 150.000 1.350 STO Infinity 0.460 8 21.690 2.860 1.99 16.48 9 35.780 2.450 10 23.320 4.590 1.44 95.10 11 -26.200 0.100 12 21.750 3.480 1.62 63.40 13 -16.320 1.880 1.85 23.79 14 64.160 2.260 15 25.850 5.110 1.99 16.48 16 39.400 5.720 17 -22.320 1.250 1.59 61.12 18 43.020 1.940 19 Infinity 0.500 1.52 64.21 20 Infinity 2.000 IMA / /

[0260] Table 7

[0261] Table 8 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S5, S6, S17, and S18 in Example 4.

[0262]

[0263] Table 8

[0264] Example 5

[0265] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0266] like Figure 5 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0267] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is convex. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0268] In this example, the total effective focal length F of the optical lens is 21.086mm, the total length TTL of the optical lens is 61.829mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0269] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0270] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0271]

[0272]

[0273] Table 9

[0274] Table 10 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example 5.

[0275]

[0276] Table 10

[0277] Example 6

[0278] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0279] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0280] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is convex. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0281] In this example, the total effective focal length F of the optical lens is 21.120mm, the total length TTL of the optical lens is 61.730mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0282] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0283] 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).

[0284] Surf Radius Thickness Nd Vd 1 13.890 3.290 2.00 25.44 2 11.550 5.500 3 -28.680 6.500 1.92 18.90 4 -37.360 5.000 STO Infinity 0.610 6 -60.000 4.250 1.99 16.48 7 -80.000 0.780 8 17.450 3.240 1.81 41.00 9 29.720 6.910 10 20.190 4.900 1.44 95.10 11 -24.700 0.100 12 15.130 3.030 1.62 63.40 13 -150.000 0.700 1.85 23.79 14 10.180 0.950 15 11.940 6.500 1.99 16.48 16 12.090 2.890 17 -100.000 3.080 1.59 61.12 18 -130.000 1.000 19 Infinity 0.500 1.52 64.21 20 Infinity 2.000 IMA / /

[0285] Table 11

[0286] Table 12 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example Six.

[0287]

[0288]

[0289] Table 12

[0290] Example 7

[0291] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0292] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0293] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 has negative optical power. Its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 also has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0294] In this example, the total effective focal length F of the optical lens is 21.164mm, the total length TTL of the optical lens is 54.070mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0295] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0296] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0297]

[0298]

[0299] Table 13

[0300] Table 14 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example 7.

[0301]

[0302] Table 14

[0303] Example 8

[0304] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0305] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side of protective glass S19, second side of protective glass S10, and imaging plane IMA.

[0306] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fourth lens L4 has negative optical power, its first side surface S8 is concave, and its second side surface S9 is convex. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is convex. The eighth lens L8 has negative optical power. Its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 also has negative optical power. Its first side surface S17 is convex, and its second side surface S18 is concave. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0307] In this example, the total effective focal length F of the optical lens is 21.128mm, the total length TTL of the optical lens is 53.350mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0308] In this example, both the fourth lens L4 and the ninth lens L9 are aspherical lenses.

[0309] In this example, the first side surface S17 of the ninth lens is set to be inverted.

[0310] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0311] Surf Radius Thickness Nd Vd 1 17.040 3.430 2.00 25.44 2 15.110 8.300 3 -20.530 3.520 1.92 18.90 4 -58.280 1.680 STO Infinity 0.100 6 31.410 2.880 1.99 16.48 7 135.110 1.520 8 -78.600 2.050 1.81 41.00 9 -90.000 0.100 10 19.100 5.700 1.44 95.10 11 -22.350 0.100 12 23.630 4.500 1.62 63.40 13 -26.200 4.500 1.85 23.79 14 -308.830 0.590 15 -49.000 4.500 1.99 16.48 16 -70.000 5.130 17 108.760 1.250 1.59 61.12 18 11.110 1.000 19 Infinity 0.500 1.52 64.21 20 Infinity 2.000 IMA / /

[0312] Table 15

[0313] Table 16 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S8, S9, S17, and S18 in Example 8.

[0314]

[0315] Table 16

[0316] Example 9

[0317] like Figure 9 The diagram shown is a schematic of the optical lens structure of Example 9.

[0318] like Figure 9 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface of protective glass S19, second side surface of protective glass S10, and imaging surface IMA.

[0319] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is convex. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0320] In this example, the total effective focal length F of the optical lens is 21.825mm, the total length TTL of the optical lens is 57.766mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0321] In this example, the second side surface S6 of the third lens is set to be inverted.

[0322] In this example, both the third lens L3 and the ninth lens L9 are aspherical lenses.

[0323] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0324]

[0325]

[0326] Table 17

[0327] Table 18 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S5, S6, S17, and S18 in Example 9.

[0328]

[0329] Table 18

[0330] Example 10

[0331] like Figure 10 The diagram shown is a schematic of the optical lens structure of Example 10.

[0332] like Figure 10 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, aperture STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface of protective glass S19, second side surface of protective glass S10, and imaging surface IMA.

[0333] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S10 is convex, and its second side surface S11 is convex. The sixth lens L6 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 has negative optical power, its first side surface S13 is concave, and its second side surface S14 is concave. The eighth lens L8 has positive optical power. Its first side surface S15 is convex, and its second side surface S16 is concave. The ninth lens L9 has negative optical power. Its first side surface S17 is concave, and its second side surface S18 is convex. Light from the first side passes sequentially through surfaces S1 to S20 and is finally imaged onto the imaging plane IMA. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S13 of the sixth lens and the first side surface S13 of the seventh lens are the same surface.

[0334] In this example, the total effective focal length F of the optical lens is 21.815mm, the total length TTL of the optical lens is 57.886mm, and the maximum field of view FOV of the optical lens is 35.800°.

[0335] In this example, the second side surface S6 of the third lens is set to be inverted.

[0336] In this example, both the third lens L3 and the ninth lens L9 are aspherical lenses.

[0337] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0338] Surf Radius Thickness Nd Vd 1 13.800 3.500 2.00 25.44 2 11.200 4.900 3 -19.880 4.500 2.00 25.44 4 -124.020 1.100 5 50.730 4.500 1.81 41.00 6 -140.760 0.160 STO Infinity 0.100 8 24.840 5.600 1.99 16.48 9 40.340 2.870 10 26.490 4.950 1.44 95.10 11 -20.680 0.380 12 23.460 3.650 1.62 63.40 13 -17.230 3.120 1.85 23.79 14 34.620 2.480 15 21.130 6.070 1.99 16.48 16 31.590 6.110 17 -12.670 1.300 1.59 61.12 18 -49.000 0.100 19 Infinity 0.500 1.52 64.21 20 Infinity 1.996 IMA / /

[0339] Table 19

[0340] Table 20 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S5, S6, S17, and S18 in Example 10.

[0341]

[0342] Table 20

[0343] In summary, Examples 1 through 2 completely satisfy the relationships shown in Table 21.

[0344]

[0345]

[0346] Table 21

[0347] Table 22 gives the effective focal length F of the optical lenses in Examples 1 to 10, and the effective focal lengths of each lens from F1 to F9, etc. (unit: mm).

[0348]

[0349]

[0350] Table 22

[0351] 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.

[0352] 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.

[0353] 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.

[0354] 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 a total of nine lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens having negative optical power, wherein the first side surface of the second lens is concave. A third lens with optical power; A fourth lens with optical power; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex and the second side surface is convex; A sixth lens with positive optical power, wherein the first side surface of the sixth lens is convex and the second side surface is convex; A seventh lens with negative optical power, wherein the first side surface of the seventh lens is concave; An eighth lens with optical power; A ninth lens with negative optical power; The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50° ≤ (F × FOV) / H ≤ 75°.

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

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

4. The optical lens according to claim 1, characterized in that, The third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

5. The optical lens according to claim 1, characterized in that, The third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

6. The optical lens according to claim 1, characterized in that, The third lens has positive optical power, and the first side of the third lens is convex and the second side is concave.

7. The optical lens according to claim 1, characterized in that, The fourth lens has positive optical power, and the first side of the fourth lens is convex and the second side is concave.

8. The optical lens according to claim 1, characterized in that, The fourth lens has negative optical power, and the first side of the fourth lens is concave and the second side is convex.

9. The optical lens according to claim 1, characterized in that, The second side surface of the seventh lens is concave.

10. The optical lens according to claim 1, characterized in that, The second side surface of the seventh lens is convex.

11. The optical lens according to claim 1, characterized in that, The eighth lens has positive optical power, and the first side of the eighth lens is convex and the second side is concave.

12. The optical lens according to claim 1, characterized in that, The eighth lens has negative optical power, and the first side of the eighth lens is concave and the second side is convex.

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

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

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

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

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

18. The optical lens according to claim 1, characterized in that, The ninth lens is configured to be inverted, or the third lens is configured to be inverted.

19. The optical lens according to claim 1, characterized in that, The third lens and the ninth lens are aspherical lenses, or the fourth lens and the ninth lens are aspherical lenses.

20. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the following condition: 0.1≤R15 / R16≤3.

21. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -10≤R10 / R11≤-0.

1.

22. The optical lens according to any one of claims 1 to 19, characterized in that, The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50° ≤ (F × FOV) / H ≤ 60°.

23. The optical lens according to any one of claims 1 to 19, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -20≤F2 / F≤-0.

1.

24. The optical lens according to any one of claims 1 to 19, characterized in that, The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.580≤F / ENPD≤2.

25. The optical lens according to any one of claims 1 to 19, characterized in that, The air gap d11 between the fifth lens and the sixth lens satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: d11 / TTL≤0.

2.

26. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R11 of the second side of the fifth lens satisfies the following condition with respect to the focal length F of the optical lens: 0.1≤R11 / F≤10.

27. The optical lens according to any one of claims 1 to 19, 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: 0.01 / mm ≤ D / H / F ≤ 0.5 / mm.

28. The optical lens according to any one of claims 1 to 19, 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≤1.

5.

29. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens, the radius of curvature R16 of the second side surface of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.2≤R15 / (R16+d15)≤2.

30. The optical lens according to any one of claims 1 to 19, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F≤3.

6.

31. The optical lens according to any one of claims 1 to 19, characterized in that, The aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.4≤D18 / H≤1.

5.

32. The optical lens according to any one of claims 1 to 19, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -10≤F6 / F7≤-0.

1.

33. The optical lens according to any one of claims 1 to 19, characterized in that, The focal length F6 of the sixth lens satisfies the following condition with respect to the total focal length F of the optical lens: 0.3 ≤ F6 / F ≤ 2.

34. The optical lens according to any one of claims 1 to 19, characterized in that, The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.3≤F5 / F≤3.

35. The optical lens according to any one of claims 1 to 19, characterized in that, The optical back focal length of the optical lens, i.e., the center distance BFL from the second side center of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the total optical length of the optical lens, i.e., the center distance TTL from the first side center of the first lens of the optical lens to the center of the imaging plane: BFL / TTL≤0.

1.

36. The optical lens according to any one of claims 1 to 19, characterized in that, The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≤0.

1.

37. An optical lens, characterized in that, The optical lens has a total of nine lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power; A second lens with negative optical power; A third lens with optical power; A fourth lens with optical power; A fifth lens with positive optical power; A sixth lens with positive optical power; A seventh lens with negative optical power; An eighth lens with optical power; A ninth lens with negative optical power; The total optical length of the optical lens, i.e. the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F≤3.6; The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50° ≤ (F × FOV) / H ≤ 75°.

38. The optical lens according to claim 37, characterized in that, The first side of the first lens is convex, and the second side is concave.

39. The optical lens according to claim 37, characterized in that, The first side of the second lens is concave, and the second side is convex.

40. The optical lens according to claim 37, characterized in that, The first side surface of the second lens is concave, and the second side surface is concave.

41. The optical lens according to claim 37, characterized in that, The third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

42. The optical lens according to claim 37, characterized in that, The third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

43. The optical lens according to claim 37, characterized in that, The third lens has positive optical power, and the first side of the third lens is convex and the second side is concave.

44. The optical lens according to claim 37, characterized in that, The fourth lens has positive optical power, and the first side of the fourth lens is convex and the second side is concave.

45. The optical lens according to claim 37, characterized in that, The fourth lens has negative optical power, and the first side of the fourth lens is concave and the second side is convex.

46. ​​The optical lens according to claim 37, characterized in that, The first side surface of the fifth lens is convex, and the second side surface is convex.

47. The optical lens according to claim 37, characterized in that, The first side surface of the sixth lens is convex, and the second side surface is convex.

48. The optical lens according to claim 37, characterized in that, The first side surface of the seventh lens is concave, and the second side surface is concave.

49. The optical lens according to claim 37, characterized in that, The first side of the seventh lens is concave, and the second side is convex.

50. The optical lens according to claim 37, characterized in that, The eighth lens has positive optical power, and the first side of the eighth lens is convex and the second side is concave.

51. The optical lens according to claim 37, characterized in that, The eighth lens has negative optical power, and the first side of the eighth lens is concave and the second side is convex.

52. The optical lens according to claim 37, characterized in that, The first side of the ninth lens is concave, and the second side is convex.

53. The optical lens according to claim 37, characterized in that, The first side surface of the ninth lens is concave, and the second side surface is concave.

54. The optical lens according to claim 37, characterized in that, The first side of the ninth lens is convex, and the second side is concave.

55. The optical lens according to claim 37, characterized in that, The sixth lens and the seventh lens are cemented together to form a cemented doublet lens.

56. The optical lens according to claim 37, characterized in that, The optical lens further includes an aperture stop, which is located between the second lens and the third lens, or between the third lens and the fourth lens.

57. The optical lens according to claim 37, characterized in that, The ninth lens is configured to be inverted, or the third lens is configured to be inverted.

58. The optical lens according to claim 37, characterized in that, The third lens and the ninth lens are aspherical lenses, or the fourth lens and the ninth lens are aspherical lenses.

59. The optical lens according to any one of claims 37 to 58, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R16 of the second side surface of the eighth lens satisfy the following condition: 0.2≤R15 / R16≤2.

60. The optical lens according to any one of claims 37 to 58, characterized in that, The radius of curvature R10 of the first side surface of the fifth lens and the radius of curvature R11 of the second side surface of the fifth lens satisfy the following condition: -1.765≤R10 / R11≤-0.

6.

61. The optical lens according to any one of claims 37 to 58, characterized in that, The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 50° ≤ (F × FOV) / H ≤ 60°.

62. The optical lens according to any one of claims 37 to 58, characterized in that, The focal length F2 of the second lens satisfies the following relationship with the total focal length F of the optical lens: -15≤F2 / F≤-0.

6.

63. The optical lens according to any one of claims 37 to 58, characterized in that, The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.580≤F / ENPD≤1.

8.

64. The optical lens according to any one of claims 37 to 58, characterized in that, The air gap d11 between the fifth lens and the sixth lens satisfies the following condition with respect to the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens: d11 / TTL≤0.

1.

65. The optical lens according to any one of claims 37 to 58, characterized in that, The radius of curvature R11 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.713≤R11 / F≤1.

149.

66. The optical lens according to any one of claims 37 to 58, 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: 0.055 / mm≤D / H / F≤0.076 / mm.

67. The optical lens according to any one of claims 37 to 58, 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: 0.4≤(F*θ) / D≤1.

68. The optical lens according to any one of claims 37 to 58, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens, the radius of curvature R16 of the second side surface of the eighth lens, and the center thickness d15 of the eighth lens satisfy the following condition: 0.4≤R15 / (R16+d15)≤1.

5.

69. The optical lens according to any one of claims 37 to 58, characterized in that, The aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.6≤D18 / H≤1.

2.

70. The optical lens according to any one of claims 37 to 58, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: -2.019≤F6 / F7≤-0.

5.

71. The optical lens according to any one of claims 37 to 58, characterized in that, The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.6 ≤ F6 / F ≤ 1.

5.

72. The optical lens according to any one of claims 37 to 58, characterized in that, The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 0.5 ≤ F5 / F ≤ 1.

362.

73. The optical lens according to any one of claims 37 to 58, characterized in that, The optical back focal length of the optical lens, i.e., the center distance BFL from the second side center of the last lens of the optical lens to the center of the imaging plane, satisfies the following condition with respect to the total optical length of the optical lens, i.e., the center distance TTL from the first side center of the first lens of the optical lens to the center of the imaging plane: BFL / TTL≤0.

1.

74. The optical lens according to any one of claims 37 to 58, characterized in that, The optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, and the lens group length of the optical lens, i.e., the distance TL from the center of the first side of the first lens of the optical lens to the center of the second side of the last lens of the optical lens, satisfy the following condition: BFL / TL≤0.

1.

75. An electronic device, characterized in that, It includes an optical lens as described in any one of claims 1 to 74 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images