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 second side of the first lens being concave; a second lens with positive optical power, the first side of the second lens being convex; a third lens with optical power, the first side of the third lens being concave and the second side being convex; a fourth lens with negative optical power, the second side of the fourth lens being concave; a fifth lens with positive optical power, the first side of the fifth lens being convex; and a sixth lens with optical power, the first side of the sixth lens being concave and the second side being convex. The application solves the problem that the optical lens in the prior art cannot simultaneously have high relative luminance, long back focal length, high resolution and low cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical lens and an electronic device. BACKGROUND

[0002] In recent years, with the development of science and technology, the demand for optical lenses in daily life is increasing, and optical lenses are also applied to more and more scenes. For example, in the automobile driving industry, in order to ensure driving safety, it is necessary to more accurately detect the driving environment, and the optical lens becomes a key device for detecting information around the car.

[0003] With the rapid development of automobile automatic driving auxiliary system, the number of optical lenses used on the car is gradually increasing. Among them, side view is also an important application direction of vehicle-mounted lens, mainly divided into side front view and side rear view two types, installed in B column or vehicle rearview mirror, the field of view angle range is usually 90°-100°, mainly applied to electronic rearview mirror, lateral vehicle detection, vehicle lane changing and other scenes. In recent years, with the update and iteration of vehicle-mounted lenses, while ensuring safe driving, compared with ordinary optical lenses, vehicle-mounted lenses have more stringent standards and requirements. For example: the existing one usually needs high relative luminance to avoid the risk of traffic accidents caused by low edge field illumination and other dark angle phenomena; it also needs long back focus to ensure the adaptability of the mechanism and can effectively weaken the large halo ghost image generated by strong light source, which can avoid the influence of car lights and other bright light sources on the recognition result; at the same time, it also needs high resolution, with the emergence of million-level chips, the optical lens also needs to improve the definition to adapt; it also needs to meet the low cost to balance the low-end vehicle. However, the current optical lens is still insufficient to meet these needs.

[0004] That is, the optical lens in the prior art has the problem that high relative luminance, long back focus, high resolution and low cost are difficult to be considered at the same time. SUMMARY

[0005] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has high relative luminance, long back focus, high resolution and low cost, which are difficult to be considered at the same time.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an optical lens is provided, which comprises, in order from the first side to the second side: a first lens having a negative focal power, the second side of the first lens being concave; a second lens having a positive focal power, the first side of the second lens being convex; a third lens having a focal power, the first side of the third lens being concave and the second side being convex; a fourth lens having a negative focal power, the second side of the fourth lens being concave; a fifth lens having a positive focal power, the first side of the fifth lens being convex; and a sixth lens having a focal power, the first side of the sixth lens being concave and the second side being convex.

[0007] Further, the first side surface of the first lens is a concave surface.

[0008] Further, the first side surface of the first lens is a convex surface.

[0009] Further, the second side surface of the second lens is a convex surface.

[0010] Further, the second side surface of the second lens is a concave surface.

[0011] Further, the third lens has a positive focal power.

[0012] Further, the third lens has a negative focal power.

[0013] Further, the first side surface of the fourth lens is a convex surface.

[0014] Further, the first side surface of the fourth lens is a concave surface.

[0015] Further, the second side surface of the fifth lens is a concave surface.

[0016] Further, the second side surface of the fifth lens is a convex surface.

[0017] Further, the sixth lens has a positive focal power.

[0018] Further, the sixth lens has a negative focal power.

[0019] Further, the fourth lens and the fifth lens are cemented to form a double cemented lens.

[0020] Further, the sixth lens is provided with a reverse curve.

[0021] Further, the third lens and the sixth lens are both aspherical lenses.

[0022] Further, the optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens.

[0023] Further, a radius of curvature R62 of the second side surface of the sixth lens and a total focal length value F of the optical lens satisfy: R62 / F≤-0.1.

[0024] Further, a maximum field of view FOV of the optical lens, a total focal length value F of the optical lens and an image height H corresponding to the maximum field of view of the optical lens satisfy: (FOVxF) / H≥40.

[0025] Further, an optical total length of the optical lens, i.e. a center distance TTL from a first side center of a first lens of the optical lens to a center of an imaging surface of the optical lens and a total focal length value F of the optical lens satisfy: TTL / F≤7.

[0026] Further, the optical total track 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 surface of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: TTL / H / FOV≤0.2.

[0027] Further, the optical total track 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 surface of the optical lens, and the maximum entrance pupil diameter D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: TTL / D≤5.

[0028] Further, the total focal length value F of the optical lens, the radian value θ of the maximum field of view angle of the optical lens, and the maximum entrance pupil diameter D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: (F*θ) / D≥0.1.

[0029] Further, the maximum entrance pupil diameter D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens satisfy: D / H / FOV≤0.15.

[0030] Further, the maximum entrance pupil diameter D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the total focal length value F of the optical lens satisfy: D / H / F≤1.5.

[0031] Further, the image height H corresponding to the maximum field of view angle of the optical lens, the total focal length value F of the optical lens, and the radian value θ of the maximum field of view angle of the optical lens satisfy: |(H-F*θ) / (F*θ)|≤0.15.

[0032] Further, 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 surface, and the optical total track 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 surface of the optical lens satisfy: BFL / TTL≥0.2.

[0033] Further, the total focal length value F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: 0.1≤F / H≤3.

[0034] Further, the air gap d2 between the first lens and the second lens and the optical total track 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 surface of the optical lens satisfy: d2 / TTL≥0.1.

[0035] Further, an overall focal length F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.5.

[0036] Further, the overall focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and a maximum clear aperture D of a first side of a first lens corresponding to a maximum field angle of the optical lens satisfy: F / ENPD / D≤1.2.

[0037] Further, a stop aperture DST of the optical lens and the overall focal length F of the optical lens satisfy: DST / F≥0.08.

[0038] Further, a curvature radius R61 of a first side of the sixth lens and a curvature radius R62 of a second side of the sixth lens satisfy: 0.1≤R61 / R62≤3.

[0039] Further, an image height H corresponding to the maximum field angle of the optical lens, the overall focal length F of the optical lens, and an arc value θ of the maximum field angle of the optical lens satisfy: 0.1≤(H / 2) / (F*tan(θ / 2))≤2.

[0040] Further, a refractive power of the optical lens and a combined refractive power of the second lens and the third lens satisfy:

[0041] Further, a sagittal height SAG31 of the first side of the third lens and a sagittal height SAG32 of the second side of the third lens satisfy: 0.01≤|SAG31 / SAG32|≤3.

[0042] Further, a sagittal height SAG61 of the first side of the sixth lens and a sagittal height SAG62 of the second side of the sixth lens satisfy: 0.01≤|SAG61 / SAG62|≤5.

[0043] Further, a curvature radius R61 of the first side of the sixth lens, a curvature radius R62 of the second side of the sixth lens, and a central thickness d10 of the sixth lens satisfy: 0.1≤R61 / (R62+d10)≤3.5.

[0044] According to another aspect of the present disclosure, there is provided an optical lens comprising, in order from a first side to a second side: a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a refractive power; a fourth lens having a negative refractive power; a fifth lens having a positive refractive power; a sixth lens having a refractive power; a curvature radius R62 of a second side of the sixth lens and an overall focal length F of the optical lens satisfy: R62 / F≤-0.1.

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

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

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

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

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

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

[0051] Furthermore, the first side of the fourth lens is convex, and the second side is concave.

[0052] Furthermore, the first side surface of the fourth lens is concave, and the second side surface is concave.

[0053] Furthermore, the first side of the fifth lens is convex, and the second side is concave.

[0054] Furthermore, the first side surface of the fifth lens is convex, and the second side surface is convex.

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

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

[0057] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens.

[0058] Furthermore, the sixth lens is configured to be inverted.

[0059] Furthermore, both the third and sixth lenses are aspherical lenses.

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

[0061] 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: (FOV×F) / H≥40.

[0062] 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≤7.

[0063] Furthermore, 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: TTL / H / FOV≤0.2.

[0064] Furthermore, 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 maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens: TTL / D≤5.

[0065] 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 relationship: (F*θ) / D≥0.1.

[0066] 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 maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.15.

[0067] 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: D / H / F≤1.5.

[0068] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.15.

[0069] 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≥0.2.

[0070] Furthermore, 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: 0.1≤F / H≤3.

[0071] Furthermore, the air gap d2 between the first lens and the second 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 to the center of the imaging plane of the optical lens: d2 / TTL≥0.1.

[0072] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤2.5.

[0073] Furthermore, the total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: F / ENPD / D≤1.2.

[0074] Furthermore, the aperture diameter DST of the optical lens and the total focal length F of the optical lens satisfy the following condition: DST / F≥0.08.

[0075] Furthermore, the radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the following condition: 0.1≤R61 / R62≤3.

[0076] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.1≤(H / 2) / (F*tan(θ / 2))≤2.

[0077] Furthermore, the optical lens's optical power Combined optical power with the second and third lenses The following conditions must be met:

[0078] Furthermore, the sagitta SAG31 of the first side of the third lens and the sagitta SAG32 of the second side of the third lens satisfy the following condition: 0.01≤|SAG31 / SAG32|≤3.

[0079] Furthermore, the sagitta SAG61 of the first side of the sixth lens and the sagitta SAG62 of the second side of the sixth lens satisfy the following condition: 0.01≤|SAG61 / SAG62|≤5.

[0080] Furthermore, the radius of curvature R61 of the first side of the sixth lens, the radius of curvature R62 of the second side of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.1≤R61 / (R62+d10)≤3.5.

[0081] 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.

[0082] According to the technical solution of the present invention, the optical lens includes, from the first side to the second side, a first lens with negative optical power, a second lens with positive optical power, a third lens with optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with optical power. The second side of the first lens is concave; the first side of the second lens is convex; the first side of the third lens is concave and the second side is convex; the second side of the fourth lens is concave; the first side of the fifth lens is convex; and the first side of the sixth lens is concave and the second side is convex.

[0083] The first lens has negative optical power. Its first side can be either concave or convex, while its second side is concave. The negative optical power of the first lens diverges light rays passing through it. Under the same field of view, light rays exiting from the second side of the first lens allow subsequent optical systems to have a larger light-receiving surface. When the first side of the first lens is concave, it avoids contact and friction between the lens and its surroundings, which is beneficial for the protection of the lens and its coating. The concave second side rapidly diverges large-angle light rays passing through the first side of the first lens, which is beneficial for subsequent optical systems to correct aberrations of large-angle light rays, achieving high resolution. When the first side of the first lens is convex, it can collect as much light as possible from a large field of view into the subsequent optical system, and in practical environments such as rain or snow, it facilitates the sliding off of water droplets, reducing their impact on imaging.

[0084] The second lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. It is made of glass with positive optical power, high refractive index, and low Abbe number, which smoothly receives the diverging light from the first lens and complements the chromatic aberration of the first lens's low refractive index and high Abbe number. When the second side of the second lens is convex, its shape is biconvex, and the lens shape is gentle, allowing diverging light to smoothly enter the rear, facilitating a longer distance between the first and second lenses and reducing the aperture and sensitivity of the system's rear group. When the second side of the second lens is concave, the lens shape is gentle, allowing diverging light to converge smoothly into the rear, further smoothing the light path transition, reducing light loss, and improving the illumination of the peripheral field of view.

[0085] The third lens can be either positive or negative optical power. The first side of the third lens is concave, and the second side is convex. When the third lens has positive optical power, it is preferably an aspherical lens with a meniscus shape, which converges light rays, helping to reduce the overall system length, increase the aperture of the optical lens, and improve the amount of light entering the lens. When the third lens has negative optical power, it is preferably an aspherical lens with a meniscus shape, which can receive and diverge forward light rays, allowing the light beams in the edge field of view to reach the third lens at a higher height and wider width, thereby improving the relative illumination of the edge field of view.

[0086] The fourth lens has negative optical power. Its first side can be either convex or concave, while its second side is concave. When the first side of the fourth lens is convex, the peripheral field rays are deflected downwards (towards the center) after passing through it, reducing the aperture of the rear system. When the first side of the fourth lens is concave, it is a biconcave lens, causing light rays to diverge before and after passing through it. This clearly distinguishes the peripheral and central rays in each field of view, facilitating aberration correction between the central and peripheral rays and promoting high resolution.

[0087] The fifth lens has positive optical power. Its first side is convex, while its second side can be either concave or convex. When the second side is concave, the fifth lens has a convex-concave shape, possessing positive optical power. It is a crescent shape convex towards the first side, collecting light rays entering through the fourth lens, ensuring a smooth transition of light paths to the rear, and reducing the height of incident light rays, thereby lowering the sensitivity of the system's rear group. When the second side is convex, the fifth lens has a biconvex shape, allowing diverging light rays to converge smoothly into the rear, further smoothing the light path transition. The convex second side further converges the light, reducing the angle between the principal rays at the edges and the normal to the imaging plane, thus improving the relative illumination at the edges of the field of view.

[0088] The sixth lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the sixth lens has positive optical power, it is preferably an aspherical lens, which provides a smooth light path, improves astigmatism and field curvature, enhances the resolving power of the optical system, and reduces the cone angle and principal ray incident angle of the light beams reaching the imaging plane at the edges. The concave-convex shape of the sixth lens, with its gentle curve, minimizes the impact of large temperature changes on its focal length, helping the entire optical system maintain stable performance over a wide temperature range. The convex second side increases the cone angle of light reaching the imaging plane and reduces the principal ray incident angle, converging light from a larger aperture and increasing the amount of light entering the lens. When the sixth lens has negative optical power, it is preferably an aspherical lens, which helps adjust aberrations at large field angles at the edges and improves the large-angle resolution in the central region.

[0089] This application employs six 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 relative illumination, long back focal length, high resolution, and low cost. Attached Figure Description

[0090] 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:

[0091] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0092] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0093] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0094] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0095] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0096] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0097] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0098] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown.

[0099] The above figures include the following reference numerals:

[0100] L1, First lens; S1, First side surface of the first lens; S2, Second side surface of the first lens; L2, Second lens; S3, First side surface of the second lens; S4, Second side surface of the second lens; STO, Aperture stop; L3, Third lens; S6, First side surface of the third lens; S7, Second side surface of the third lens; L4, Fourth lens; S8, First side surface of the fourth lens; S9, Second side surface of the fourth lens; L5, Fifth lens; S9, First side surface of the fifth lens; S10, Second side surface of the fifth lens; L6, Sixth lens; S11, First side surface of the sixth lens; S12, Second side surface of the sixth lens; S13, First side surface of the protective glass; S14, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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. Light rays from the object side can form an image on the image side.

[0109] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light rays from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0110] To address the problem that existing optical lenses cannot simultaneously achieve high relative illumination, long back focal length, high resolution, and low cost, this invention provides an optical lens and an electronic device.

[0111] Example 1

[0112] like Figures 1 to 8 As shown, the optical lens, from the first side to the second side, includes a first lens with negative optical power, a second lens with positive optical power, a third lens with optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with optical power. The second side of the first lens is concave; the first side of the second lens is convex; the first side of the third lens is concave and the second side is convex; the second side of the fourth lens is concave; the first side of the fifth lens is convex; and the first side of the sixth lens is concave and the second side is convex.

[0113] The first lens has negative optical power. Its first side can be either concave or convex, while its second side is concave. The negative optical power of the first lens diverges light rays passing through it. Under the same field of view, light rays exiting from the second side of the first lens allow subsequent optical systems to have a larger light-receiving surface. When the first side of the first lens is concave, it avoids contact and friction between the lens and its surroundings, which is beneficial for the protection of the lens and its coating. The concave second side rapidly diverges large-angle light rays passing through the first side of the first lens, which is beneficial for subsequent optical systems to correct aberrations of large-angle light rays, achieving high resolution. When the first side of the first lens is convex, it can collect as much light as possible from a large field of view into the subsequent optical system, and in practical environments such as rain or snow, it facilitates the sliding off of water droplets, reducing their impact on imaging.

[0114] The second lens has positive optical power. Its first side is convex, while its second side can be either convex or concave. It is made of glass with positive optical power, high refractive index, and low Abbe number, which smoothly receives the diverging light from the first lens and complements the chromatic aberration of the first lens's low refractive index and high Abbe number. When the second side of the second lens is convex, its shape is biconvex, and the lens shape is gentle, allowing diverging light to smoothly enter the rear, facilitating a longer distance between the first and second lenses and reducing the aperture and sensitivity of the system's rear group. When the second side of the second lens is concave, the lens shape is gentle, allowing diverging light to converge smoothly into the rear, further smoothing the light path transition, reducing light loss, and improving the illumination of the peripheral field of view.

[0115] The third lens can be either positive or negative optical power. The first side of the third lens is concave, and the second side is convex. When the third lens has positive optical power, it is preferably an aspherical lens with a meniscus shape, which converges light rays, helping to reduce the overall system length, increase the aperture of the optical lens, and improve the amount of light entering the lens. When the third lens has negative optical power, it is preferably an aspherical lens with a meniscus shape, which can receive and diverge forward light rays, allowing the light beams in the edge field of view to reach the third lens at a higher height and wider width, thereby improving the relative illumination of the edge field of view.

[0116] The fourth lens has negative optical power. Its first side can be either convex or concave, while its second side is concave. When the first side of the fourth lens is convex, the peripheral field rays are deflected downwards (towards the center) after passing through it, reducing the aperture of the rear system. When the first side of the fourth lens is concave, it is a biconcave lens, causing light rays to diverge before and after passing through it. This clearly distinguishes the peripheral and central rays in each field of view, facilitating aberration correction between the central and peripheral rays and promoting high resolution.

[0117] The fifth lens has positive optical power. Its first side is convex, while its second side can be either concave or convex. When the second side is concave, the fifth lens has a convex-concave shape, possessing positive optical power. It is a crescent shape convex towards the first side, collecting light rays entering through the fourth lens, ensuring a smooth transition of light paths to the rear, and reducing the height of incident light rays, thereby lowering the sensitivity of the system's rear group. When the second side is convex, the fifth lens has a biconvex shape, allowing diverging light rays to converge smoothly into the rear, further smoothing the light path transition. The convex second side further converges the light, reducing the angle between the principal rays at the edges and the normal to the imaging plane, thus improving the relative illumination at the edges of the field of view.

[0118] The sixth lens can have either positive or negative optical power. Its first side is concave, and its second side is convex. When the sixth lens has positive optical power, it is preferably an aspherical lens, which provides a smooth light path, improves astigmatism and field curvature, enhances the resolving power of the optical system, and reduces the cone angle and principal ray incident angle of the light beams reaching the imaging plane at the edges. The concave-convex shape of the sixth lens, with its gentle curve, minimizes the impact of large temperature changes on its focal length, helping the entire optical system maintain stable performance over a wide temperature range. The convex second side increases the cone angle of light reaching the imaging plane and reduces the principal ray incident angle, converging light from a larger aperture and increasing the amount of light entering the lens. When the sixth lens has negative optical power, it is preferably an aspherical lens, which helps adjust aberrations at large field angles at the edges and improves the large-angle resolution in the central region.

[0119] This application employs six 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 relative illumination, long back focal length, high resolution, and low cost.

[0120] In this embodiment, the first side surface of the first lens is concave. When the first side surface of the first lens is concave, it can avoid contact and friction between the lens and its surroundings, which is beneficial to the protection of the lens and the coating. The second side surface is concave, which can quickly diverge large-angle light rays passing through the first side surface of the first lens, which is beneficial to the subsequent optical system for correcting aberrations of large-angle light rays and achieving high resolution.

[0121] In this embodiment, the first side surface of the first lens is convex. When the first side surface of the first lens is convex, it can collect as much light as possible from a large field of view into the rear optical system, and in actual use environments such as rainy or snowy weather, it facilitates the sliding off of water droplets, reducing the impact on imaging.

[0122] In this embodiment, the second side surface of the second lens is convex. When the second side surface of the second lens is convex, its shape is biconvex, and the lens shape is gentle, allowing diverging light to enter smoothly into the rear, making it easier to lengthen the distance between the first lens and the second lens, and reducing the aperture and sensitivity of the rear group of the system.

[0123] In this embodiment, the second side surface of the second lens is concave. When the second side surface of the second lens is concave, the lens shape is gentle, allowing divergent light rays to converge smoothly and enter the rear, further smoothing the light path transition, reducing light energy loss, and improving the illumination of the peripheral field of view.

[0124] In this embodiment, the third lens has positive optical power. When the third lens has positive optical power, it is preferably an aspherical lens with a meniscus shape, which has a converging effect on light, thus helping to reduce the overall length of the system, increase the aperture of the optical lens, and improve the amount of light entering the lens.

[0125] In this embodiment, the third lens has negative optical power. When the third lens has negative optical power, it is preferably an aspherical lens with a crescent shape, which can receive and diverge the light rays in front, so that the light beams in the edge field of view reach the third lens at a higher height and a wider width, thereby improving the relative illumination of the edge field of view.

[0126] In this embodiment, the first side surface of the fourth lens is convex. When the first side surface of the fourth lens is convex, the edge field rays are deflected downwards (towards the center) after passing through the first side surface of the fourth lens, reducing the aperture of the rear system.

[0127] In this embodiment, the first side surface of the fourth lens is concave. When the first side surface of the fourth lens is concave, the fourth lens is biconcave, and the light rays diverge before and after passing through the fourth lens. The edge rays and center rays of each field of view are clearly distinguished, which is beneficial for aberration correction between the center and edge rays of each field of view and for achieving high resolution.

[0128] In this embodiment, the second side surface of the fifth lens is concave. When the second side surface of the fifth lens is concave, the fifth lens has a convex-concave shape, positive optical power, and a crescent shape convex towards the first side. It collects the light entering through the fourth lens, so that the light path smoothly transitions to the rear, reducing the height of the light incident at the rear, thereby reducing the sensitivity of the rear group of the system.

[0129] In this embodiment, the second side surface of the fifth lens is convex. When the second side surface of the fifth lens is convex, the fifth lens has a biconvex shape, which allows diverging light rays to converge smoothly and enter the rear, further smoothing the transition of light paths; the convexity of the second side surface of the fifth lens further converges the light rays, reducing the angle between the edge principal rays and the normal of the imaging plane, thereby improving the relative illumination of the edge field of view.

[0130] In this embodiment, the sixth lens has positive optical power. When the sixth lens has positive optical power, it is preferably an aspherical lens, which provides a smooth light path, improves astigmatism and field curvature, enhances the resolving power of the optical system, and reduces the cone angle and principal ray incident angle when the edge field beam reaches the imaging plane. The sixth lens has a concave-convex shape with a gentle curve, so large temperature changes have less impact on the focal length of the sixth lens, which helps the entire optical system maintain stable performance over a wide temperature range. The second side is convex, which helps increase the cone angle when the light reaches the imaging plane and reduce the principal ray incident angle, converging light from a larger aperture and increasing the amount of light entering the optical lens.

[0131] In this embodiment, the sixth lens has negative optical power. When the sixth lens has negative optical power, it is preferably an aspherical lens, which is beneficial for adjusting aberrations at large field of view at the edges and can improve the large-angle resolution of the central region.

[0132] In this embodiment, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens. By using a cemented doublet lens, chromatic aberration can be effectively corrected, the overall length of the optical lens can be reduced, and light can be smoothly transitioned to the rear system, thus optimizing the CRA, illumination, distortion, and other performance characteristics of the optical system. The fourth lens has negative optical power, and the edge rays and center rays of each field of view are clearly distinguished, which is beneficial for aberration correction of the center and edge rays of each field of view and for achieving high resolution. The fifth lens has positive optical power, collecting the light entering through the fourth lens and smoothing the light path to the rear, thus reducing the height of the incident light. The fourth lens uses a high refractive index, low Abbe number material, while the fifth lens uses a relatively low refractive index, high Abbe number material. The cementation of these two materials effectively corrects chromatic aberration in the optical system. This reduces the number of assembly components between the fourth and fifth lenses, which helps to reduce processes and overall weight, thus lowering costs. It also reduces light energy loss caused by inter-lens reflections, improves the illumination of the image plane, and weakens ghosting. Because the light transitions smoothly when passing through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, thus reducing tolerance sensitivity during lens assembly. It also facilitates the rational allocation of focal length. Since both lenses are made of glass, it helps to achieve thermal compensation and improve the performance of the optical lens at different temperatures.

[0133] In this embodiment, the sixth lens is inverted. Specifically, the second side of the sixth lens is inverted, which helps to balance aberrations and improve resolution. By placing the aperture stop between the second and third lenses, it is beneficial to effectively gather the light entering the optical system, reduce the lens aperture at the rear of the optical system, and reduce the assembly sensitivity of the system.

[0134] In this embodiment, both the third and sixth lenses are aspherical lenses. Using aspherical lenses for the third and sixth lenses is beneficial for achieving a large angular resolution in the central region, thus improving image resolution; it also helps to reduce field curvature and astigmatism, thereby enhancing resolving power.

[0135] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. The aperture stop's location between the second and third lenses 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.

[0136] In this embodiment, the radius of curvature R62 of the second side surface of the sixth lens satisfies the condition R62 / F ≤ -0.1 with respect to the focal length F of the optical lens. Satisfying this condition allows the second side surface of the sixth lens to be convex, which helps to increase the cone angle when light reaches the imaging plane and reduce the incident angle of the principal ray, converging light from a larger aperture and improving the light intake and relative illumination of the optical lens. Preferably, R62 / F ≤ -0.5.

[0137] 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 condition: (FOV×F) / H≥40. Satisfying this condition is beneficial for simultaneously achieving both telephoto and a large field of view, balancing large angular resolution and large distortion. Preferably, (FOV×F) / H≥50.

[0138] 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 condition TTL / F ≤ 7 with respect to the total focal length F of the optical lens. Satisfying this condition ensures a small ratio between the total optical length and the focal length of the optical lens, resulting in a smaller total optical length, which is beneficial for miniaturization. Preferably, TTL / F ≤ 5.5.

[0139] 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.2. Satisfying this condition ensures a short TTL under the same imaging plane, enabling miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.12.

[0140] 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 condition TTL / D ≤ ​​5 with respect to the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens. Satisfying this condition allows for a more compact and smaller optical system while maintaining the same lens aperture. Preferably, TTL / D ≤ ​​3.5.

[0141] 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 condition: (F*θ) / D≥0.1. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, (F*θ) / D≥0.4.

[0142] 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 maximum field of view (FOV) of the optical lens satisfy the condition: D / H / FOV ≤ 0.15. By satisfying this condition, while keeping the maximum field of view image height and the corresponding field of view angle unchanged, a small front aperture is maintained, enabling miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0143] 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 condition: D / H / F ≤ 1.5. Satisfying this condition, under the condition of a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.8.

[0144] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.15. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.09.

[0145] 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 ≥ 0.2, which is the optical total 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. Controlling this condition satisfies the specific requirements for the back focal length of the optical lens and also reserves space for the installation and focusing of optical components, avoiding mechanical interference. Preferably, BFL / TTL ≥ 0.22.

[0146] In this embodiment, 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 condition: 0.1 ≤ F / H ≤ 3. Satisfying this condition helps to control the focal length and image height within a certain range, which is beneficial for improving resolution. Preferably, 0.3 ≤ F / H ≤ 1.5.

[0147] In this embodiment, the air gap d2 between the first lens and the second 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 to the center of the imaging plane of the optical lens: d2 / TTL ≥ 0.1. Controlling this condition ensures a greater distance between the first and second lenses, allowing the diverging light rays from the first lens to smoothly enter the rear of the system, reducing the aperture and sensitivity at the rear of the system and improving resolution. Preferably, d2 / TTL ≥ 0.15.

[0148] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 2.5. Satisfying this condition is beneficial for achieving a small FNO, increasing light transmission, and a large entrance pupil diameter, which helps improve relative illumination. Preferably, F / ENPD ≤ 2.3.

[0149] In this embodiment, the overall focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition: F / ENPD / D ≤ 1.2. By controlling this condition, a small aperture is ensured while maintaining high light transmission, thus achieving miniaturization of the optical lens. Preferably, F / ENPD / D ≤ 0.5.

[0150] In this embodiment, the aperture diameter (DST) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: DST / F ≥ 0.08. Satisfying this condition ensures a large ratio between the aperture diameter and the effective focal length, thereby ensuring a large aperture of the optical lens, which is beneficial for achieving high light transmission. Preferably, DST / F ≥ 0.25.

[0151] In this embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the condition: 0.1 ≤ R61 / R62 ≤ 3. Satisfying this condition ensures that the radii of curvature of the two surfaces of the sixth lens are close, which is beneficial for maintaining the stability of the entire optical system over a large temperature variation range. Preferably, 0.2 ≤ R61 / R62 ≤ 2.2.

[0152] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 0.1 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 2. By controlling the ratio of the actual image height to the ideal image height, a large angular resolution can be achieved. Preferably, 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 1.5.

[0153] In this embodiment, the optical lens's optical power Combined optical power with the second and third lenses The following conditions must be met: Satisfying this condition can effectively correct astigmatism in optical lenses and improve their resolution. Preferably,

[0154] In this embodiment, the sagitta of the first side surface of the third lens, SAG31, and the sagitta of the second side surface of the third lens, SAG32, satisfy the condition: 0.01 ≤ |SAG31 / SAG32| ≤ 3. Satisfying this condition ensures that the sagitta of the two sides of the third lens are similar, which is beneficial for smooth light transition and reduces lens sensitivity. Preferably, 0.15 ≤ |SAG31 / SAG32| ≤ 2.

[0155] In this embodiment, the sagitta of the first side surface SAG61 of the sixth lens and the sagitta of the second side surface SAG62 of the sixth lens satisfy the condition: 0.01 ≤ |SAG61 / SAG62| ≤ 5. Satisfying this condition ensures that the sagitta of the two sides of the sixth lens are similar, which is beneficial for smooth light transition and reduces lens sensitivity. Preferably, 0.25 ≤ |SAG61 / SAG62| ≤ 4.

[0156] In this embodiment, the radius of curvature R61 of the first side surface of the sixth lens, the radius of curvature R62 of the second side surface of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.1 ≤ R61 / (R62+d10) ≤ 3.5. The special lens shape (approaching a concentric circle) creates an optical path difference between the peripheral and central rays, diverging the central rays and allowing them to enter the rear optical system. This also reduces the front diameter of the optical lens, decreasing its size and facilitating miniaturization and cost reduction. Preferably, 0.25 ≤ R61 / (R62+d10) ≤ 2.8.

[0157] Example 2

[0158] like Figures 1 to 8 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 positive optical power; a third lens with optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; and a sixth lens with optical power. The radius of curvature R62 of the second side of the sixth lens satisfies the following condition with respect to the focal length F of the entire optical lens: R62 / F ≤ -0.1. Satisfying this condition, the second side of the sixth lens is convex, which helps to increase the cone angle when light reaches the imaging plane and reduce the incident angle of the principal ray, converging light from a larger aperture and improving the light intake and relative illumination of the optical lens. Preferably, R62 / F ≤ -0.5.

[0159] In this embodiment, the first side surface of the first lens is concave, and the second side surface is also concave. The first lens has negative optical power and diverges light rays passing through it. Under the same field of view, the light rays emitted from the second side surface of the first lens can provide a larger light receiving surface for subsequent optical systems. When the first side surface of the first lens is concave, it can avoid contact and friction between the lens and its surroundings, which is beneficial for the protection of the lens and the coating. The second side surface is concave, which can quickly diverge large-angle light rays passing through the first side surface of the first lens, which is beneficial for the subsequent optical system to correct aberrations of large-angle light rays and achieve high resolution.

[0160] In this embodiment, the first side surface of the first lens is convex, and the second side surface is concave. When the first side surface of the first lens is convex, it can collect as much light as possible from a large field of view into the rear optical system, and in actual use environments such as rainy or snowy weather, it facilitates the sliding off of water droplets, reducing the impact on imaging.

[0161] In this embodiment, both the first and second sides of the second lens are convex. The glass, with positive optical power, high refractive index, and low Abbe number, can smoothly receive the diverging light emitted from the first lens and complement its chromatic aberration with the low refractive index and high Abbe number of the first lens. When the second side of the second lens is convex, its shape is biconvex, and the lens shape is gently sloping, allowing the diverging light to smoothly enter the rear, making it easier to lengthen the distance between the first and second lenses, and reducing the aperture and sensitivity of the system's rear group.

[0162] In this embodiment, the first side surface of the second lens is convex, and the second side surface is concave. When the second side surface of the second lens is concave, the lens shape is gentle, allowing divergent light rays to converge smoothly and enter the rear, further smoothing the light path transition, reducing light energy loss, and improving the illumination of the peripheral field of view.

[0163] In this embodiment, the third lens has positive optical power, and its first side surface is concave while its second side surface is convex. The third lens is preferably an aspherical lens with a meniscus shape, which converges light rays, thus reducing the overall system length, increasing the aperture of the optical lens, and improving the amount of light entering the system.

[0164] In this embodiment, the third lens has negative optical power, and its first side surface is concave while its second side surface is convex. The third lens is preferably an aspherical lens with a meniscus shape, which can receive and diverge forward light rays, allowing the edge field of view beams to reach the third lens at a higher height and with a wider width, thereby improving the relative illumination of the edge field of view.

[0165] In this embodiment, the first side surface of the fourth lens is convex, and the second side surface is concave. When the first side surface of the fourth lens is convex, the edge field rays are deflected downwards (towards the center) after passing through the first side surface of the fourth lens, reducing the aperture of the rear system.

[0166] In this embodiment, the first side surface of the fourth lens is concave, and the second side surface is concave. When the first side surface of the fourth lens is concave, the fourth lens is biconcave, and the light rays diverge before and after passing through the fourth lens. The edge rays and center rays of each field of view are clearly distinguished, which is beneficial for aberration correction between the center and edge rays of each field of view and for achieving high resolution.

[0167] In this embodiment, the first side of the fifth lens is convex, and the second side is concave. When the second side of the fifth lens is concave, the fifth lens has a convex-concave shape, positive optical power, and a crescent shape convex towards the first side. It collects the light entering through the fourth lens, so that the light path smoothly transitions to the rear, reducing the height of the incident light at the rear, thereby reducing the sensitivity of the rear group of the system.

[0168] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is convex. When the second side surface of the fifth lens is convex, the fifth lens has a biconvex shape, which allows diverging light rays to converge smoothly and enter the rear, further smoothing the transition of light paths; the second side surface of the fifth lens is convex, which further converges the light rays, reducing the angle between the principal rays at the edge and the normal of the imaging plane, thereby improving the relative illumination of the edge field of view.

[0169] In this embodiment, the sixth lens has positive optical power, with a concave first side and a convex second side. When the sixth lens has positive optical power, it is preferably an aspherical lens, which provides a smooth light path, improves astigmatism and field curvature, enhances the resolving power of the optical system, and reduces the cone angle and principal ray incident angle when the edge field beam reaches the imaging plane. The concave-convex shape of the sixth lens, with its gentle curve, minimizes the impact of large temperature changes on its focal length, helping the entire optical system maintain stable performance over a wide temperature range. The convex second side increases the cone angle when the light reaches the imaging plane and reduces the principal ray incident angle, converging a larger aperture of light and increasing the amount of light entering the optical lens.

[0170] In this embodiment, the sixth lens has negative optical power, and its first side surface is concave while its second side surface is convex. When the sixth lens has negative optical power, it is preferably an aspherical lens, which is beneficial for adjusting aberrations at large field-of-view angles at the edges and can improve the large-angle resolution in the central region.

[0171] This application employs six 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 relative illumination, long back focal length, high resolution, and low cost.

[0172] In this embodiment, the fourth lens and the fifth lens are cemented together to form a cemented doublet lens. By using a cemented doublet lens, chromatic aberration can be effectively corrected, the overall length of the optical lens can be reduced, and light can be smoothly transitioned to the rear system, thus optimizing the CRA, illumination, distortion, and other performance characteristics of the optical system. The fourth lens has negative optical power, and the edge rays and center rays of each field of view are clearly distinguished, which is beneficial for aberration correction of the center and edge rays of each field of view and for achieving high resolution. The fifth lens has positive optical power, collecting the light entering through the fourth lens and smoothing the light path to the rear, thus reducing the height of the incident light. The fourth lens uses a high refractive index, low Abbe number material, while the fifth lens uses a relatively low refractive index, high Abbe number material. The cementation of these two materials effectively corrects chromatic aberration in the optical system. This reduces the number of assembly components between the fourth and fifth lenses, which helps to reduce processes and overall weight, thus lowering costs. It also reduces light energy loss caused by inter-lens reflections, improves the illumination of the image plane, and weakens ghosting. Because the light transitions smoothly when passing through the cemented surface, it is less sensitive to tolerances such as eccentricity and tilt between the two lenses, thus reducing tolerance sensitivity during lens assembly. It also facilitates the rational allocation of focal length. Since both lenses are made of glass, it helps to achieve thermal compensation and improve the performance of the optical lens at different temperatures.

[0173] In this embodiment, the sixth lens is inverted. Specifically, the second side of the sixth lens is inverted, which helps to balance aberrations and improve resolution. By placing the aperture stop between the second and third lenses, it is beneficial to effectively gather the light entering the optical system, reduce the lens aperture at the rear of the optical system, and reduce the assembly sensitivity of the system.

[0174] In this embodiment, both the third and sixth lenses are aspherical lenses. Using aspherical lenses for the third and sixth lenses is beneficial for achieving a large angular resolution in the central region, thus improving image resolution; it also helps to reduce field curvature and astigmatism, thereby enhancing resolving power.

[0175] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the second lens and the third lens. The aperture stop's location between the second and third lenses 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.

[0176] 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 condition: (FOV×F) / H≥40. Satisfying this condition is beneficial for simultaneously achieving both telephoto and a large field of view, balancing large angular resolution and large distortion. Preferably, (FOV×F) / H≥50.

[0177] 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 condition TTL / F ≤ 7 with respect to the total focal length F of the optical lens. Satisfying this condition ensures a small ratio between the total optical length and the focal length of the optical lens, resulting in a smaller total optical length, which is beneficial for miniaturization. Preferably, TTL / F ≤ 5.5.

[0178] 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following condition: TTL / H / FOV ≤ 0.2. Satisfying this condition ensures a short TTL under the same imaging plane, enabling miniaturization of the optical lens. Preferably, TTL / H / FOV ≤ 0.12.

[0179] 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 condition TTL / D ≤ ​​5 with respect to the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens. Satisfying this condition allows for a more compact and smaller optical system while maintaining the same lens aperture. Preferably, TTL / D ≤ ​​3.5.

[0180] 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 condition: (F*θ) / D≥0.1. Satisfying this condition allows for a smaller front aperture of the optical lens, reducing the volume of the imaging system. Preferably, (F*θ) / D≥0.4.

[0181] 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 maximum field of view (FOV) of the optical lens satisfy the condition: D / H / FOV ≤ 0.15. By satisfying this condition, while keeping the maximum field of view image height and the corresponding field of view angle unchanged, a small front aperture is maintained, enabling miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0182] 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 condition: D / H / F ≤ 1.5. Satisfying this condition, under the condition of a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.8.

[0183] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: |(HF*θ) / (F*θ)|≤0.15. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF*θ) / (F*θ)|≤0.09.

[0184] 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 ≥ 0.2, which is the optical total 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. Controlling this condition satisfies the specific requirements for the back focal length of the optical lens and also reserves space for the installation and focusing of optical components, avoiding mechanical interference. Preferably, BFL / TTL ≥ 0.22.

[0185] In this embodiment, 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 condition: 0.1 ≤ F / H ≤ 3. Satisfying this condition helps to control the focal length and image height within a certain range, which is beneficial for improving resolution. Preferably, 0.3 ≤ F / H ≤ 1.5.

[0186] In this embodiment, the air gap d2 between the first lens and the second 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 to the center of the imaging plane of the optical lens: d2 / TTL ≥ 0.1. Controlling this condition ensures a greater distance between the first and second lenses, allowing the diverging light rays from the first lens to smoothly enter the rear of the system, reducing the aperture and sensitivity at the rear of the system and improving resolution. Preferably, d2 / TTL ≥ 0.15.

[0187] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 2.5. Satisfying this condition is beneficial for achieving a small FNO, increasing light transmission, and a large entrance pupil diameter, which helps improve relative illumination. Preferably, F / ENPD ≤ 2.3.

[0188] In this embodiment, the overall focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition: F / ENPD / D ≤ 1.2. By controlling this condition, a small aperture is ensured while maintaining high light transmission, thus achieving miniaturization of the optical lens. Preferably, F / ENPD / D ≤ 0.5.

[0189] In this embodiment, the aperture diameter (DST) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: DST / F ≥ 0.08. Satisfying this condition ensures a large ratio between the aperture diameter and the effective focal length, thereby ensuring a large aperture of the optical lens, which is beneficial for achieving high light transmission. Preferably, DST / F ≥ 0.25.

[0190] In this embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the condition: 0.1 ≤ R61 / R62 ≤ 3. Satisfying this condition ensures that the radii of curvature of the two surfaces of the sixth lens are close, which is beneficial for maintaining the stability of the entire optical system over a large temperature variation range. Preferably, 0.2 ≤ R61 / R62 ≤ 2.2.

[0191] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 0.1 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 2. By controlling the ratio of the actual image height to the ideal image height, a large angular resolution can be achieved. Preferably, 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 1.5.

[0192] In this embodiment, the optical lens's optical power Combined optical power with the second and third lenses The following conditions must be met: Satisfying this condition can effectively correct astigmatism in optical lenses and improve their resolution. Preferably,

[0193] In this embodiment, the sagitta of the first side surface of the third lens, SAG31, and the sagitta of the second side surface of the third lens, SAG32, satisfy the condition: 0.01 ≤ |SAG31 / SAG32| ≤ 3. Satisfying this condition ensures that the sagitta of the two sides of the third lens are similar, which is beneficial for smooth light transition and reduces lens sensitivity. Preferably, 0.15 ≤ |SAG31 / SAG32| ≤ 2.

[0194] In this embodiment, the sagitta of the first side surface SAG61 of the sixth lens and the sagitta of the second side surface SAG62 of the sixth lens satisfy the condition: 0.01 ≤ |SAG61 / SAG62| ≤ 5. Satisfying this condition ensures that the sagitta of the two sides of the sixth lens are similar, which is beneficial for smooth light transition and reduces lens sensitivity. Preferably, 0.25 ≤ |SAG61 / SAG62| ≤ 4.

[0195] In this embodiment, the radius of curvature R61 of the first side surface of the sixth lens, the radius of curvature R62 of the second side surface of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.1 ≤ R61 / (R62+d10) ≤ 3.5. The special lens shape (approaching a concentric circle) creates an optical path difference between the peripheral and central rays, diverging the central rays and allowing them to enter the rear optical system. This also reduces the front diameter of the optical lens, decreasing its size and facilitating miniaturization and cost reduction. Preferably, 0.25 ≤ R61 / (R62+d10) ≤ 2.8.

[0196] Optionally, the aforementioned optical lens may also include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0197] The optical lens in this application can employ multiple lenses, such as the six lenses mentioned above. This application does not specifically limit the number of spherical and aspherical lenses; when image quality is a primary concern, the number of aspherical lenses can be increased. The characteristic of an aspherical lens is that its curvature changes continuously from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0198] In this exemplary embodiment, the solution is not limited to plastic or glass for the lenses. If temperature performance is a primary concern, the first, second, third, fourth, fifth, and sixth 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 can prevent lens blurring caused by high and low temperature variations in the operating environment, thus avoiding impact on 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 resolution and reliability are of primary concern, the first to sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to sixth lenses in the optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0199] 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.

[0200] 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 six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0201] 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.

[0202] It should be noted that any of the examples one through eight below are applicable to all embodiments of this application.

[0203] Example 1

[0204] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0205] like Figure 1 As shown, the optical lens, from the first side to the second side, includes: a first lens L1, a second lens L2, an aperture stop S10, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface of the protective glass S13, a second side surface of the protective glass S14, and an imaging plane IMA. The first lens L1 has negative optical power; its first side surface S1 and second side surface S2 are both concave. The second lens L2 has positive optical power; its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power; its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative 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 S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power. Its first side surface S11 is concave, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0206] In this example, the total effective focal length F of the optical lens is 4.140mm, the maximum field of view (FOV) of the optical lens is 80.000°, and the total length (TTL) of the optical lens is 18.746mm.

[0207] 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).

[0208] Surf Radius Thickness Nd Vd 1 -79.730 1.300 1.50 81.61 2 3.498 5.323 3 5.904 0.861 1.88 40.87 4 15.226 0.387 5 Infinity 0.272 6 -8.521 1.461 1.53 55.58 7 -4.639 0.110 8 5.589 0.626 1.92 18.90 9 2.826 1.779 1.83 42.73 10 6.620 0.869 11 -7.075 1.045 1.53 55.58 12 -4.464 0.350 13 Infinity 0.950 1.52 64.20 14 Infinity 3.4136 IMA / /

[0209] Table 1

[0210] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0211]

[0212] 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, and E 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 S6, S7, S11, and S12 in Example 1.

[0213] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 5.5870 4.2536E-04 1.2460E-04 6.3702E-06 -1.0704E-06 6.4171E-07 -8.9226E-08 8.6047E-09 7 -2.8055 -2.0566E-03 1.8320E-04 -3.0740E-06 -5.6411E-06 1.7178E-06 -1.1195E-07 -7.9193E-09 11 7.3107 -1.2603E-03 -9.4083E-04 4.2935E-04 -1.0960E-04 1.1936E-05 -6.0849E-08 -3.6426E-08 12 -6.2459 -9.1288E-03 5.0368E-04 -4.2984E-05 -1.1792E-06 5.5753E-07 -1.2863E-07 9.1856E-09

[0214] Table 2

[0215] Example 2

[0216] like Figure 2 The diagram shown is a schematic of the optical lens structure for Example 2. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples.

[0217] 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, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0218] The first lens L1 has negative optical power, with its first side surface S1 being concave and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has positive optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0219] In this example, the total effective focal length F of the optical lens is 4.148mm, the maximum field of view (FOV) of the optical lens is 80.000°, and the total length (TTL) of the optical lens is 18.753mm.

[0220] 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).

[0221] Surf Radius Thickness Nd Vd 1 -78.410 1.200 1.50 81.61 2 3.492 5.325 3 5.904 0.917 1.88 40.87 4 15.223 0.417 5 Infinity 0.238 6 -8.518 1.483 1.53 55.58 7 -4.642 0.110 8 5.590 0.626 1.92 18.90 9 2.827 1.778 1.83 42.73 10 6.616 0.869 11 -7.077 1.076 1.53 55.58 12 -4.461 0.350 13 Infinity 0.950 1.52 64.20 14 Infinity 3.414 IMA / /

[0222] Table 3

[0223] 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 S6, S7, S11, and S12 in Example 2.

[0224] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 5.5963 4.2288E-04 1.2381E-04 6.0851E-06 -1.1683E-06 6.0939E-07 -9.9688E-08 5.2534E-09 7 -2.8023 -2.0604E-03 1.8176E-04 -3.3988E-06 -5.6954E-06 1.7131E-06 -1.1073E-07 -7.0764E-09 11 7.2985 -1.2387E-03 -9.3560E-04 4.3023E-04 -1.0947E-04 1.1948E-05 -6.1246E-08 -3.7120E-08 12 -6.2294 -9.1329E-03 5.0338E-04 -4.3092E-05 -1.1980E-06 5.5575E-07 -1.2854E-07 9.2829E-09

[0225] Table 4

[0226] Example 3

[0227] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0228] 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, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0229] The first lens L1 has negative optical power, and its first side surface S1 is concave, as is its second side surface S2. The second lens L2 has positive optical power, and its first side surface S3 is convex, as are its second side surface S4. The third lens L3 has positive optical power, and its first side surface S6 is concave, as is its second side surface S7. The fourth lens L4 has negative optical power, and its first side surface S8 is convex, as is its second side surface S9. The fifth lens L5 has positive optical power, and its first side surface S9 is convex, as is its second side surface S10. The sixth lens L6 has positive optical power, and its first side surface S11 is concave, as is its second side surface S12. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0230] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0231] In this example, the total effective focal length F of the optical lens is 5.069mm, the maximum field of view (FOV) of the optical lens is 80.000°, and the total length (TTL) of the optical lens is 19.103mm.

[0232] 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).

[0233]

[0234]

[0235] Table 5

[0236] 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 S6, S7, S11, and S12 in Example 3.

[0237] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 4.1479 2.1220E-03 4.4732E-04 -3.1003E-05 2.4218E-06 5.0315E-07 -1.1295E-07 8.1226E-09 7 -7.1227 -1.1507E-03 5.7334E-04 -4.1075E-05 -1.2057E-06 1.8231E-06 -2.0797E-07 3.4758E-10 11 6.4999 5.4809E-03 -7.9393E-04 5.6280E-04 -1.2953E-04 1.3071E-05 -1.3969E-07 -3.1048E-08 12 -14.8330 -9.4430E-04 6.4042E-04 -1.0890E-05 -5.3218E-06 8.2914E-07 -5.5489E-08 1.7199E-09

[0238] Table 6

[0239] Example 4

[0240] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0241] 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, aperture STO, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0242] The first lens L1 has negative optical power, and its first side surface S1 is concave, as is its second side surface S2. The second lens L2 has positive optical power, and its first side surface S3 is convex, as are its second side surface S4. The third lens L3 has positive optical power, and its first side surface S6 is concave, as is its second side surface S7. The fourth lens L4 has negative optical power, and its first side surface S8 is convex, as is its second side surface S9. The fifth lens L5 has positive optical power, and its first side surface S9 is convex, as is its second side surface S10. The sixth lens L6 has positive optical power, and its first side surface S11 is concave, as is its second side surface S12. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0243] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0244] In this example, the total effective focal length F of the optical lens is 4.7624mm, the maximum field of view (FOV) of the optical lens is 80.000°, and the total length (TTL) of the optical lens is 19.084mm.

[0245] 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).

[0246] Surf Radius Thickness Nd Vd 1 -19.4125 1.3000 1.50 81.59 2 3.7356 4.3009 3 7.7449 1.7263 1.83 42.73 4 -18.2029 0.1069 5 Infinity 0.3382 6 -7.6091 1.0275 1.53 55.58 7 -6.7251 0.1000 8 10.2493 0.6625 1.92 18.90 9 3.7235 1.4463 1.83 42.73 10 62.2853 1.1817 11 -7.4563 2.0297 1.53 55.58 12 -6.3821 0.4272 13 Infinity 0.9500 1.52 64.21 14 Infinity 3.4867 IMA / /

[0247] Table 7

[0248] 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 S6, S7, S11, and S12 in Example 4.

[0249] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 4.1641 2.1075E-03 4.4674E-04 -3.0893E-05 2.4405E-06 4.9779E-07 -1.1733E-07 8.1226E-09 7 -7.2503 -1.1426E-03 5.6907E-04 -4.2155E-05 -1.3309E-06 1.8334E-06 -1.9703E-07 3.4758E-10 11 6.4856 5.5353E-03 -7.8048E-04 5.6422E-04 -1.2945E-04 1.3069E-05 -1.4192E-07 -3.1630E-08 12 -12.2660 -1.0909E-03 6.4091E-04 -1.0039E-05 -5.2115E-06 8.3750E-07 -5.5604E-08 1.5201E-09

[0250] Table 8

[0251] Example 5

[0252] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0253] like Figure 5As 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, first side surface of protective glass S13, second side surface of protective glass S14, 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 positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative 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 S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0255] In this example, the total effective focal length F of the optical lens is 5.037mm, the maximum field of view (FOV) of the optical lens is 90.000°, and the total length (TTL) of the optical lens is 19.108mm.

[0256] 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).

[0257] Surf Radius Thickness Nd Vd 1 158.227 1.200 1.50 81.61 2 3.471 4.676 3 6.321 1.276 1.88 40.87 4 18.518 0.702 5 Infinity 0.215 6 -7.746 1.000 1.53 55.58 7 -4.616 0.100 8 5.677 0.694 1.92 18.90 9 2.853 1.886 1.83 42.73 10 7.047 0.957 11 -7.146 1.500 1.53 55.58 12 -4.940 0.443 13 Infinity 0.950 1.52 64.20 14 Infinity 3.508 IMA / /

[0258] Table 9

[0259] 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 S6, S7, S11, and S12 in Example 5.

[0260] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 3.9821 1.0932E-03 1.4305E-04 6.0109E-06 -1.5815E-06 5.0511E-07 -1.1482E-07 8.1226E-09 7 -2.7511 -2.0713E-03 2.0094E-04 -4.4812E-06 -5.9456E-06 1.6087E-06 -1.1651E-07 3.4758E-10 11 7.8084 -1.0341E-03 -8.6894E-04 4.4151E-04 -1.0898E-04 1.1995E-05 2.5634E-18 2.4136E-21 12 -8.0144 -8.0200E-03 5.3607E-04 -3.0157E-05 -8.2664E-07 5.8733E-07 -1.2367E-07 1.0569E-08

[0261] Table 10

[0262] Example 6

[0263] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0264] likeFigure 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, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0265] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative 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 S9 is convex, and its second side surface S10 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0266] In this example, the total effective focal length F of the optical lens is 4.750mm, the maximum field of view (FOV) of the optical lens is 90.000°, and the total length (TTL) of the optical lens is 19.282mm.

[0267] 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).

[0268] Surf Radius Thickness Nd Vd 1 100.000 1.300 1.50 81.61 2 3.441 5.000 3 5.777 1.100 1.88 40.87 4 12.107 0.440 5 Infinity 0.497 6 -8.447 1.100 1.53 55.58 7 -4.578 0.120 8 5.761 0.619 1.92 18.90 9 3.020 1.217 1.83 42.73 10 7.701 1.262 11 -7.618 1.300 1.53 55.58 12 -4.852 0.177 13 Infinity 0.950 1.52 64.20 14 Infinity 4.200 IMA / /

[0269] Table 11

[0270] 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 S6, S7, S11, and S12 in Example 6.

[0271] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 4.3018 9.5397E-04 1.5559E-04 1.1944E-05 6.1179E-07 1.0699E-06 -8.9094E-08 -7.1435E-08 7 -3.0401 -1.8474E-03 2.2445E-04 3.6160E-06 -4.0562E-06 1.8696E-06 -1.3296E-07 -2.9316E-08 11 7.1285 8.2498E-05 -9.9089E-04 4.3427E-04 -1.0949E-04 1.1605E-05 -1.5920E-07 -5.0504E-08 12 -8.2453 -8.0170E-03 4.6860E-04 -3.5503E-05 -8.2283E-07 5.9095E-07 -1.3474E-07 7.1577E-09

[0272] Table 12

[0273] Example 7

[0274] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0275] 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, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0276] The first lens L1 has negative optical power, and its first side surface S1 and second side surface S2 are both concave. The second lens L2 has positive optical power, and its first side surface S3 and second side surface S4 are both convex. The third lens L3 has negative optical power, and its first side surface S6 and second side surface S7 are both convex. The fourth lens L4 has negative optical power, and its first side surface S8 and second side surface S9 are both concave. The fifth lens L5 has positive optical power, and its first side surface S9 and second side surface S10 are both convex. The sixth lens L6 has negative optical power, and its first side surface S11 and second side surface S12 are both concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0277] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0278] In this example, the total effective focal length F of the optical lens is 5.043mm, the maximum field of view (FOV) of the optical lens is 100.000°, and the total length (TTL) of the optical lens is 19.034mm.

[0279] 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).

[0280] Surf Radius Thickness Nd Vd 1 -132.225 1.200 1.50 81.61 2 3.430 4.105 3 7.153 1.659 1.88 40.87 4 -9.905 0.357 5 Infinity 0.325 6 -3.982 1.000 1.53 55.58 7 -4.736 0.100 8 -34.185 0.550 1.92 18.90 9 5.388 2.136 1.83 42.73 10 -5.747 0.320 11 -4.617 2.026 1.53 55.58 12 -10.286 0.443 13 Infinity 0.950 1.52 64.20 14 Infinity 3.863 IMA / /

[0281] Table 13

[0282] 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 S6, S7, S11, and S12 in Example 7.

[0283] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 -1.1712 1.7470E-03 5.4358E-04 -1.2379E-04 1.1076E-05 1.7535E-06 -2.3808E-07 -2.5353E-08 7 -3.2447 5.9260E-04 9.8951E-04 -1.6060E-04 -2.6449E-06 3.3307E-06 6.8518E-07 -1.6430E-07 11 1.7475 4.9183E-03 -1.1492E-03 6.7165E-04 -1.3677E-04 1.1237E-05 3.9956E-08 -2.0180E-08 12 -34.7080 -1.8122E-03 5.1219E-04 -3.5582E-05 3.1656E-07 6.7515E-07 -1.2057E-07 6.5595E-09

[0284] Table 14

[0285] Example 8

[0286] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0287] 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, first side surface of protective glass S13, second side surface of protective glass S14, and imaging surface IMA.

[0288] The first lens L1 has negative optical power, and its first side surface S1 and second side surface S2 are both concave. The second lens L2 has positive optical power, and its first side surface S3 and second side surface S4 are both convex. The third lens L3 has negative optical power, and its first side surface S6 and second side surface S7 are both convex. The fourth lens L4 has negative optical power, and its first side surface S8 and second side surface S9 are both concave. The fifth lens L5 has positive optical power, and its first side surface S9 and second side surface S10 are both convex. The sixth lens L6 has negative optical power, and its first side surface S11 and second side surface S12 are both concave. Light from the first side passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented together to form a cemented doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0289] In this example, the second side surface S12 of the sixth lens is set to be inverted.

[0290] In this example, the total effective focal length F of the optical lens is 4.518mm, the maximum field of view (FOV) of the optical lens is 100.000°, and the total length (TTL) of the optical lens is 18.291mm.

[0291] 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).

[0292]

[0293]

[0294] Table 15

[0295] 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 S6, S7, S11, and S12 in Example 8.

[0296] Order of the higher order term / 4 6 8 10 12 14 16 Surf K A B C D E F G 6 -1.3347 2.0828E-03 6.6747E-04 -1.2644E-04 7.0931E-06 3.6904E-07 -7.6685E-08 5.9337E-08 7 -4.9242 1.2390E-03 1.0371E-03 -1.4526E-04 6.4416E-06 1.5523E-06 -1.2278E-07 -1.8752E-09 11 2.1571 8.6255E-03 -1.1638E-03 6.5579E-04 -1.3587E-04 1.1903E-05 -1.2509E-08 1.4086E-10 12 -31.0940 -1.3625E-03 5.9766E-04 -3.3949E-05 -1.1042E-06 5.9719E-07 -1.2603E-07 9.6161E-09

[0297] Table 16

[0298] In summary, Examples 1 through 8 satisfy the relationships shown in Table 17.

[0299]

[0300] Table 17

[0301] Table 18 gives the effective focal length F of the optical lenses in Examples 1 to 8, and the effective focal lengths of each lens from F1 to F6, etc. (unit: mm).

[0302]

[0303] Table 18

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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 consists of six lenses, which are sequentially arranged from the first side to the second side as follows: A first lens having negative optical power, wherein the second side surface of the first lens is concave. A second lens having positive optical power, wherein the first side surface of the second lens is convex. A third lens with optical power, wherein the first side surface of the third lens is concave and the second side surface is convex; A fourth lens with negative optical power, wherein the second side surface of the fourth lens is concave; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex; A sixth lens with optical power, wherein the first side surface of the sixth lens is concave and the second side surface is convex; 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: 0.210≤D / H / F≤1.5; the air gap d2 between the first lens and the second lens and the total optical length of the optical lens, that is, 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, satisfy the following: d2 / TTL≥0.1; 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 optical total 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, satisfy the following condition: BFL / TTL≥0.

2. The sagitta SAG61 of the first side of the sixth lens and the sagitta SAG62 of the second side of the sixth lens satisfy the following condition: 0.605≤|SAG61 / SAG62|≤3.

105.

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

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

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

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

6. The optical lens according to claim 1, characterized in that, The third lens has positive optical power.

7. The optical lens according to claim 1, characterized in that, The third lens has negative optical power.

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

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

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

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

12. The optical lens according to claim 1, characterized in that, The sixth lens has positive optical power.

13. The optical lens according to claim 1, characterized in that, The sixth lens has negative optical power.

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

15. The optical lens according to claim 1, characterized in that, The sixth lens is configured to be inverted.

16. The optical lens according to claim 1, characterized in that, Both the third lens and the sixth lens are aspherical lenses.

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

18. The optical lens according to any one of claims 1 to 17, characterized in that, The radius of curvature R62 of the second side surface of the sixth lens satisfies the following condition with respect to the focal length F of the optical lens: R62 / F≤-0.

1.

19. The optical lens according to any one of claims 1 to 17, 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 relationship: (FOV×F) / H≥40.

20. The optical lens according to any one of claims 1 to 17, 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≤7.

21. The optical lens according to any one of claims 1 to 17, 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 surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: TTL / H / FOV≤0.

2.

22. The optical lens according to any one of claims 1 to 17, 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 surface of the optical lens, satisfies the following condition with respect to the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens: TTL / D≤5.

23. The optical lens according to any one of claims 1 to 17, 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 relationship: (F*θ) / D≥0.

1.

24. The optical lens according to any one of claims 1 to 17, 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 maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.

15.

25. The optical lens according to any one of claims 1 to 17, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.

15.

26. The optical lens according to any one of claims 1 to 17, characterized in that, 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: 0.1≤F / H≤3.

27. The optical lens according to any one of claims 1 to 17, 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: F / ENPD≤2.

5.

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

2.

29. The optical lens according to any one of claims 1 to 17, characterized in that, The aperture diameter (DST) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: DST / F ≥ 0.

08.

30. The optical lens according to any one of claims 1 to 17, characterized in that, The radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the following condition: 0.1≤R61 / R62≤3.

31. The optical lens according to any one of claims 1 to 17, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: 0.1≤(H / 2) / (F*tan(θ / 2))≤2.

32. The optical lens according to any one of claims 1 to 17, characterized in that, The optical power φ of the optical lens and the combined optical power φ23 of the second lens and the third lens satisfy the following condition: 0.1≤φ23 / φ≤2.

33. The optical lens according to any one of claims 1 to 17, characterized in that, The sagitta SAG31 of the first side of the third lens and the sagitta SAG32 of the second side of the third lens satisfy the following condition: 0.01≤|SAG31 / SAG32|≤3.

34. The optical lens according to any one of claims 1 to 17, characterized in that, The radius of curvature R61 of the first side surface of the sixth lens, the radius of curvature R62 of the second side surface of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.1≤R61 / (R62+d10)≤3.

5.

35. The optical lens according to any one of claims 1 to 17, characterized in that, The optical lens satisfies at least one of the following: The radius of curvature R62 of the second side surface of the sixth lens satisfies the following relationship with the focal length F of the optical lens: -2.040≤R62 / F≤-0.5; 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: 58.496 ≥ (FOV × F) / H ≥ 50. 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: 3.769≤TTL / F≤5.5; 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: TTL / H / FOV≤0.12; 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, satisfies the following condition with respect to the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens: 1.903≤TTL / D≤3.

5. 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: 0.918≥(F*θ) / D≥0.

4. 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 maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.05; 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: 0.210≤D / H / F≤0.8; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.09; 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, 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: 0.284≥BFL / TTL≥0.

22. 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: 0.3≤F / H≤1.5; The air gap d2 between the first lens and the second 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 to the center of the imaging plane of the optical lens: 0.284≥d2 / TTL≥0.15; The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 2.000≤F / ENPD≤2.3; The total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following relationship: F / ENPD / D≤0.5; The aperture diameter DST of the optical lens and the total focal length F of the optical lens satisfy the following condition: 0.843 ≥ DST / F ≥ 0.25; The radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the following condition: 0.2≤R61 / R62≤2.2; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.4≤(H / 2) / (F*tan(θ / 2))≤1.5; The optical power φ of the optical lens and the combined optical power φ23 of the second lens and the third lens satisfy the following condition: 0.3≤φ23 / φ≤1.5; The sagitta SAG31 of the first side of the third lens and the sagitta SAG32 of the second side of the third lens satisfy the following condition: 0.15≤|SAG31 / SAG32|≤2; The radius of curvature R61 of the first side surface of the sixth lens, the radius of curvature R62 of the second side surface of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.25≤R61 / (R62+d10)≤2.

8.

36. The optical lens according to any one of claims 1 to 17, characterized in that, The optical lens satisfies at least one of the following: The radius of curvature R62 of the second side surface of the sixth lens satisfies the following relationship with the focal length F of the optical lens: -2.040≤R62 / F≤-0.981; 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: 58.496 ≥ (FOV × F) / H ≥ 54.664; 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: 3.769≤TTL / F≤4.

528. 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, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: 0.021≤TTL / H / FOV≤0.

041. 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, satisfies the following condition with respect to the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens: 1.903≤TTL / D≤2.5544. 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: 0.918≥(F*θ) / D≥0.

744. 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 maximum field of view FOV of the optical lens satisfy the following: 0.011≤D / H / FOV≤0.017; 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: 0.210≤D / H / F≤0.329; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following condition: 0.0013≤|(HF*θ) / (F*θ)|≤0.048; 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, 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: 0.284≥BFL / TTL≥0.

251. 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: 0.556≤F / H≤0.725; The air gap d2 between the first lens and the second 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 to the center of the imaging plane of the optical lens: 0.284≥d2 / TTL≥0.216; The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 2.000≤F / ENPD≤2.200; The total focal length F of the optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.219≤F / ENPD / D≤0.

273. The aperture diameter DST of the optical lens and the total focal length F of the optical lens satisfy the following condition: 0.843 ≥ DST / F ≥ 0.686; The radius of curvature R61 of the first side surface of the sixth lens and the radius of curvature R62 of the second side surface of the sixth lens satisfy the following condition: 0.449≤R61 / R62≤1.586; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ of the maximum field of view of the optical lens satisfy the following: 0.717≤(H / 2) / (F*tan(θ / 2))≤0.851; The optical power φ of the optical lens and the combined optical power φ23 of the second lens and the third lens satisfy the following condition: 0.569≤φ23 / φ≤0.909; The sagitta SAG31 of the first side of the third lens and the sagitta SAG32 of the second side of the third lens satisfy the following condition: 0.405≤|SAG31 / SAG32|≤1.154; The radius of curvature R61 of the first side surface of the sixth lens, the radius of curvature R62 of the second side surface of the sixth lens, and the center thickness d10 of the sixth lens satisfy the following condition: 0.559≤R61 / (R62+d10)≤2.

145.

37. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 36 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images