Optical lens and electronic device with same

Abstract

The application provides an optical lens and an electronic device with the same. The optical lens comprises: a first lens, the first lens having a negative focal power, a second side of the first lens being a concave surface; a second lens, the second lens having a positive focal power, a first side of the second lens being a concave surface, and a second side of the second lens being a convex surface; a third lens, the third lens having a negative focal power, a first side of the third lens being a convex surface, and a second side of the third lens being a concave surface; a fourth lens, the fourth lens having a positive focal power, a first side of the fourth lens being a convex surface; a fifth lens, the fifth lens having a focal power, a second side of the fifth lens being a convex surface; and a sixth lens, the sixth lens having a positive focal power, a first side of the sixth lens being a convex surface. The application solves at least one of the problems of poor resolution, poor high-low temperature performance, low assembly yield, and serious stray light ghosting in the prior art.

Description

Technical Field

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

[0002] With technological advancements and increasing application demands, optical lenses are widely used in many devices, and users have increasingly higher requirements for them. Existing optical lenses primarily focus on resolution at room temperature, but their resolution performance is poor at high and low temperatures. Furthermore, as the number of lenses used increases, the sensitivity of optical lenses becomes higher, leading to lower assembly yields. In addition, existing optical lenses suffer from severe stray light and ghosting, affecting image quality. Especially in recent years, with the rapid development of human-vehicle interaction systems, optical lenses are increasingly widely used in automobiles, operating in complex temperature environments ranging from -40℃ to 85℃. Therefore, ensuring good resolution at both high and low temperatures and eliminating pyrolysis requirements are becoming increasingly important. In addition to high image quality, high assembly yields and low sensitivity are also necessary to reduce the cost of optical lenses.

[0003] In other words, existing optical lenses suffer from at least one of the following problems: poor resolution, poor performance at high and low temperatures, low assembly yield, and severe stray light and ghosting. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the problems of poor resolution, poor high and low temperature performance, low assembly yield, and severe stray light and ghosting in the prior art.

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

[0006] Furthermore, the first side surface of the first lens is convex.

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

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

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

[0010] Furthermore, the fifth lens has negative optical power, and the first side surface of the fifth lens is concave.

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

[0012] Furthermore, the second side surface of the sixth lens is a plane.

[0013] Furthermore, the second side surface of the sixth lens is concave.

[0014] Furthermore, the second side surface of the sixth lens is convex.

[0015] Furthermore, both the second and third lenses are aspherical lenses.

[0016] Furthermore, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens.

[0017] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented lens.

[0018] Furthermore, the focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: 0.1≤F45 / F≤4.8.

[0019] Furthermore, the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the following condition: -6.80≤F2 / F3≤-0.06.

[0020] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38≤|R3 / R4|≤5.60.

[0021] Furthermore, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08≤|R5 / R6|≤12.30.

[0022] Furthermore, the total optical length TTL of the optical lens and the air gap d4 between the second and third lenses satisfy the following condition: 1.3≤TTL / d4≤18.2.

[0023] Furthermore, the total optical length TTL of the optical lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 1.30≤TTL / d10≤7.40.

[0024] Furthermore, the radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 0.2≤R11 / d10≤4.5.

[0025] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.31≤F2 / F≤10.50.

[0026] Furthermore, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00≤F3 / F≤-0.07.

[0027] Furthermore, the total optical length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.2≤TTL / F≤11.2.

[0028] Furthermore, the image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003≤H / TTL≤0.580.

[0029] Furthermore, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001≤BFL / TTL≤0.290.

[0030] 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: 0.003≤F / H≤2.140.

[0031] Furthermore, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009≤D11*BFL / H≤6.400.

[0032] Furthermore, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11≤D11 / H≤5.20.

[0033] Furthermore, the total optical length TTL of the optical lens and the maximum aperture DMAX corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.8≤TTL / DMAX≤12.0.

[0034] Furthermore, the sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005≤arctan(SAG11 / D11)≤2.300.

[0035] Furthermore, the center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21≤d3 / d5≤7.50.

[0036] Furthermore, the focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05≤F6 / H≤40.00.

[0037] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02≤(d8+d9) / TTL≤0.55.

[0038] Furthermore, the sagitta SAG3 of the first side surface of the second lens and the sagitta SAG4 of the second side surface of the second lens satisfy the following condition: 0.1≤|SAG3 / SAG4|≤2.7.

[0039] Furthermore, the radius of curvature R1 of the first side of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5≤|R1 / F|≤96.0.

[0040] According to another aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power; a second lens having positive optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having optical power; and a sixth lens having positive optical power; wherein the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the condition: -6.80≤F2 / F3≤-0.06.

[0041] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0042] Furthermore, the first side surface of the first lens is concave, and the second side surface of the first lens is also concave.

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

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

[0045] Furthermore, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is also convex.

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

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

[0048] Furthermore, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, as is the second side surface of the fifth lens.

[0049] Furthermore, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is planar.

[0050] Furthermore, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

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

[0052] Furthermore, both the second and third lenses are aspherical lenses.

[0053] Furthermore, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens.

[0054] Furthermore, the fourth lens and the fifth lens are cemented together to form a cemented lens.

[0055] Furthermore, the focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: 0.1≤F45 / F≤4.8.

[0056] Furthermore, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38≤|R3 / R4|≤5.60.

[0057] Furthermore, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08≤|R5 / R6|≤12.30.

[0058] Furthermore, the total optical length TTL of the optical lens and the air gap d4 between the second and third lenses satisfy the following condition: 1.3≤TTL / d4≤18.2.

[0059] Furthermore, the total optical length TTL of the optical lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 1.30≤TTL / d10≤7.40.

[0060] Furthermore, the radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 0.2≤R11 / d10≤4.5.

[0061] Furthermore, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.31≤F2 / F≤10.50.

[0062] Furthermore, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00≤F3 / F≤-0.07.

[0063] Furthermore, the total optical length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.2≤TTL / F≤11.2.

[0064] Furthermore, the image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003≤H / TTL≤0.580.

[0065] Furthermore, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001≤BFL / TTL≤0.290.

[0066] 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: 0.003≤F / H≤2.140.

[0067] Furthermore, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009≤D11*BFL / H≤6.400.

[0068] Furthermore, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11≤D11 / H≤5.20.

[0069] Furthermore, the total optical length TTL of the optical lens and the maximum aperture DMAX corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.8≤TTL / DMAX≤12.0.

[0070] Furthermore, the sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005≤arctan(SAG11 / D11)≤2.300.

[0071] Furthermore, the center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21≤d3 / d5≤7.50.

[0072] Furthermore, the focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05≤F6 / H≤40.00.

[0073] Furthermore, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02≤(d8+d9) / TTL≤0.55.

[0074] Furthermore, the sagitta SAG3 of the first side surface of the second lens and the sagitta SAG4 of the second side surface of the second lens satisfy the following condition: 0.1≤|SAG3 / SAG4|≤2.7.

[0075] Furthermore, the radius of curvature R1 of the first side of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5≤|R1 / F|≤96.0.

[0076] According to another aspect of the present invention, an electronic device is provided, comprising the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0077] The above technical solution, by setting the first lens to have negative optical power, facilitates light divergence, disperses the central and peripheral rays of each field of view, enlarges the aperture, increases the illumination of the optical lens, and simultaneously facilitates the correction of aberrations between the peripheral and central rays, achieving high resolution. Setting the second side of the first lens as concave allows for the collection of light from a large field of view into the rear optical system, ensuring the diverged light enters smoothly and further smoothing the light path transition. Optionally, setting the first side of the first lens as convex can reduce the interference of water droplets on image quality in rainy applications. Designing the first lens as a meniscus can further maximize the collection of light from a large field of view into the rear optical system, increasing light transmission. Alternatively, the first side of the first lens can be concave, allowing the optical path difference between the peripheral and central field of view rays to accumulate rapidly, correcting aberrations in the peripheral field of view and improving resolution.

[0078] By setting the second lens to have positive optical power, it converges light rays, resulting in a smooth transition in light path. Setting the first side of the second lens to be concave facilitates a gentler entry of light into the rear lens, improving image quality. Setting the second side of the second lens to be convex compresses the angle of the incident light, achieving a smoother transition and further smoothing the light path. This also helps to compress the light collected at the front end and reduce the aperture of the rear lens.

[0079] By setting the third lens to have negative optical power, it diverges the light, resulting in a smoother transition of light path. Setting the first side of the third lens to be convex helps to collect light from the front and smoothly transition it to the rear, reducing system sensitivity. Setting the second side of the third lens to be concave allows diverged light to smoothly enter the rear, further smoothing the light path.

[0080] By setting the fourth lens to have positive optical power, light convergence is facilitated. Setting the first side of the fourth lens to be convex helps collect light emitted from the third lens. Optionally, the second side of the fourth lens can also be convex, meaning the fourth lens is biconvex with a gently sloping shape, further compressing diverging light and allowing it to smoothly enter the rear, effectively reducing the aperture of the rear lens. Alternatively, the second side of the fourth lens can be concave, which facilitates light diffusion, resulting in a smoother light path, fewer aberrations, and improved system resolving power.

[0081] By setting the fifth lens to have negative optical power, it is beneficial to properly diffuse the light and ensure a smooth transition in the light path. The first side of the fifth lens is concave, and the second side is convex. The fifth lens is a meniscus lens, meaning the light rays are almost perpendicularly incident on it, resulting in minimal light deflection and energy loss, while also reducing the lens's sensitivity. Alternatively, the fifth lens can have positive optical power, converging the light rays effectively, converging central and peripheral rays from various fields of view, increasing system illumination, and facilitating the correction of aberrations in the central and peripheral rays to achieve high resolution. The first and second sides of the fifth lens are convex, working in conjunction with the second side of the fourth lens, so that the light rays emitted from the fourth lens are almost perpendicularly incident on the first side of the fifth lens. This facilitates a smooth light transition, reduces energy loss, increases illumination in the peripheral field of view, allows for a smaller lens front aperture, reduces size, and promotes miniaturization and cost reduction.

[0082] By setting the sixth lens to have positive optical power, the light rays are further converged, resulting in a smoother transition of light paths. This avoids light energy loss caused by excessively large angles between the light rays reaching the image plane and the chip's principal ray, thus improving the illumination at the edge of the field of view. Optionally, the first side of the sixth lens is convex, and the second side is flat, with a gentle lens shape. This results in less light deflection and less light energy loss, effectively correcting astigmatism and field curvature, and improving the resolving power of the optical system. Alternatively, the first side of the sixth lens can be convex, and the second side concave, allowing the light rays to have a longer optical path to the image plane, which is beneficial for achieving a small CRA (principal angle). Furthermore, both the first and second sides of the sixth lens can be convex, with a gentle shape, which facilitates a smooth transition of light rays and tends towards perpendicular incidence, reducing aberrations, improving resolving power, and simultaneously reducing the sensitivity of the sixth lens.

[0083] 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 of the following beneficial effects: good resolution, excellent high and low temperature performance, high assembly yield, and weak ghosting. Attached Figure Description

[0084] 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:

[0085] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0086] Figure 2 A cross-sectional view of the optical lens of Example 2 of the present invention is shown;

[0087] Figure 3 A cross-sectional view of the optical lens of Example 3 of the present invention is shown;

[0088] Figure 4 A cross-sectional view of the optical lens of Example 4 of the present invention is shown;

[0089] Figure 5 A cross-sectional view of the optical lens of Example 5 of the present invention is shown;

[0090] Figure 6 A cross-sectional view of the optical lens of Example Six of the present invention is shown;

[0091] Figure 7 A cross-sectional view of the optical lens of Example Seven of the present invention is shown;

[0092] Figure 8 A cross-sectional view of the optical lens of Example 8 of the present invention is shown;

[0093] Figure 9 A cross-sectional view of the optical lens of Example Nine of the present invention is shown;

[0094] Figure 10 A cross-sectional view of the optical lens of Example 10 of the present invention is shown.

[0095] The above figures include the following reference numerals:

[0096] STO, aperture stop; 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; L3, third lens; S5, first side surface of the third lens; S6, 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 (first side surface of the fifth lens); L5, 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

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the first side surface of the lens, and the surface of each lens closest to the image side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0103] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0104] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0105] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0106] In order to solve at least one of the problems of poor resolution, poor high and low temperature performance, low assembly yield, and severe stray light and ghosting in existing optical lenses, the present invention provides an optical lens and an electronic device having the same.

[0107] Example 1

[0108] like Figures 1 to 10As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power and its second side is concave. The second lens has positive optical power, its first side is concave, and its second side is convex. The third lens has negative optical power, its first side is convex, and its second side is concave. The fourth lens has positive optical power and its first side is convex. The fifth lens has optical power and its second side is convex. The sixth lens has positive optical power and its first side is convex.

[0109] By setting the first lens to have negative optical power, it is beneficial to diverge light, disperse the central and peripheral rays of each field of view, enlarge the aperture, increase the illumination of the optical lens, and at the same time facilitate the correction of aberrations between the peripheral and central rays to achieve high resolution. Setting the second side of the first lens to be concave can collect as much light as possible from the large field of view into the rear optical system, allowing the diverged light to enter smoothly into the rear, and further making the light path transition smoothly.

[0110] Optionally, the first side of the first lens can be made convex to reduce the interference of water droplets on image quality in rainy applications. Designing the first lens as a meniscus can maximize the collection of light from a wide field of view into the rear optical system, increasing the amount of light transmitted.

[0111] Of course, the first side of the first lens can also be concave, which can allow the optical path difference between the edge field rays and the center field rays to accumulate rapidly, thereby correcting the aberrations of the edge field and improving resolution.

[0112] By setting the second lens to have positive optical power, it converges light rays, resulting in a smooth transition in light path. Setting the first side of the second lens to be concave facilitates a gentler entry of light into the rear lens, improving image quality. Setting the second side of the second lens to be convex compresses the angle of the incident light, achieving a smoother transition and further smoothing the light path. This also helps to compress the light collected at the front end and reduce the aperture of the rear lens.

[0113] By setting the third lens to have negative optical power, it diverges the light, resulting in a smoother transition of light path. Setting the first side of the third lens to be convex helps to collect light from the front and smoothly transition it to the rear, reducing system sensitivity. Setting the second side of the third lens to be concave allows diverged light to smoothly enter the rear, further smoothing the light path.

[0114] Setting the fourth lens to have positive optical power facilitates light convergence. Setting the first side of the fourth lens to be convex facilitates the collection of light emitted from the third lens.

[0115] Optionally, the second side of the fourth lens is convex, that is, the fourth lens is biconvex and has a gentle shape, which can further compress the diverging light, allowing the light to enter smoothly into the rear and effectively compress the aperture of the rear lens.

[0116] Of course, the second side of the fourth lens can also be concave, which is conducive to light diffusion, makes the light path transition smoothly, produces less aberration, and improves the system's resolving ability.

[0117] Optionally, by setting the fifth lens to have negative optical power, it is beneficial to properly diffuse the light and make the light path transition smoothly. The first side of the fifth lens is concave, the second side is convex, and the fifth lens is a meniscus lens. The light is almost perpendicular to the fifth lens, the light deflection is small, the light energy loss is small, and it also helps to reduce the sensitivity of the fifth lens.

[0118] Of course, the fifth lens could also have positive optical power, converging light rays effectively to converge central and peripheral rays from various fields of view, increasing system illumination and facilitating the correction of aberrations in both central and peripheral rays to achieve high resolution. The first and second sides of the fifth lens are convex, working in conjunction with the second side of the fourth lens to ensure that light rays emitted from the fourth lens are incident almost perpendicularly onto the first side of the fifth lens. This facilitates a smooth light transition, reduces light loss, increases illumination in the peripheral fields of view, and allows for a reduction in the lens's front aperture, thus reducing size and contributing to miniaturization and cost reduction.

[0119] By setting the sixth lens to have positive optical power, the light is further converged, and the light path transitions more smoothly. This avoids light energy loss caused by the large angle between the light rays from the large field of view and the chip's main ray when they reach the image plane, which helps to improve the illumination of the edge field of view.

[0120] Optionally, the first side of the sixth lens is convex, the second side of the sixth lens is flat, and the lens shape is gentle, resulting in less light deflection and less light energy loss. This can effectively correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0121] Of course, the first side of the sixth lens can also be convex and the second side of the sixth lens can be concave, so that the light rays have a longer optical path when they reach the image plane after passing through the sixth lens, which is beneficial to achieving a small CRA (principal angle).

[0122] Of course, it is also possible to choose a first side surface of the sixth lens to be convex, a second side surface of the sixth lens to be convex, and a flat shape of the sixth lens, which is conducive to a smooth transition of light and tends to be perpendicular to the incident light, which is conducive to reducing aberrations, improving resolution, and reducing the sensitivity of the sixth lens.

[0123] In this embodiment, both the second and third lenses are aspherical lenses. This helps to improve field curvature and astigmatism, enhance resolution, and reduce distortion.

[0124] In this embodiment, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens. This facilitates the effective focusing of light entering the optical system, and the aperture stop's central location within the optical system helps correct off-axis aberrations and improves resolution.

[0125] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented lens. This facilitates a smooth transition of light rays emitted from the front lens to the rear optical system, allowing for adequate correction of various aberrations in the optical system, improving resolution, and optimizing optical performance such as distortion and CRA. The cemented lens configuration also reduces the air gap between the fourth and fifth lenses, decreasing the overall lens length and the number of assembly components between the two lenses, thus reducing manufacturing processes and costs. Furthermore, the cemented fourth and fifth lenses are dispersive complements, which helps reduce chromatic aberration and further reduces field curvature, correcting off-axis point aberrations and improving image quality.

[0126] In this embodiment, the focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following relationship: 0.1 ≤ F45 / F ≤ 4.8. Limiting F45 / F within a reasonable range facilitates the rational allocation of the cemented lens focal length, allowing light to enter the optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, 0.7 ≤ F45 / F ≤ 2.7.

[0127] In this embodiment, the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the condition: -6.80 ≤ F2 / F3 ≤ -0.06. Limiting F2 / F3 within a reasonable range facilitates the rational allocation of the focal lengths of the second and third lenses, aids in thermal compensation, and ensures good performance of the entire optical system at both high and low temperatures, achieving excellent temperature performance. Preferably, -4.60 ≤ F2 / F3 ≤ -0.21.

[0128] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38 ≤ |R3 / R4| ≤ 5.60. Limiting |R3 / R4| within a reasonable range helps control the radius of curvature of the first side surface of the second lens and the radius of curvature of the second side surface of the second lens, which facilitates smooth light transition, improves resolution, and ensures good performance of the entire optical lens at both high and low temperatures. Preferably, 0.57 ≤ |R3 / R4| ≤ 3.50.

[0129] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08 ≤ |R5 / R6| ≤ 12.30. By limiting |R5 / R6| to a reasonable range, the radii of curvature of the first and second sides of the third lens can be controlled, which is beneficial for achieving a smooth light transition, improving resolution, and ensuring good performance of the entire optical lens at both high and low temperatures. Preferably, 0.6 ≤ |R5 / R6| ≤ 9.2.

[0130] In this embodiment, the total optical length (TTL) of the optical lens and the air gap (d4) between the second and third lenses satisfy the following condition: 1.3 ≤ TTL / d4 ≤ 18.2. Limiting TTL / d4 within a reasonable range facilitates smooth light transition, contributing to high assembly yield and low sensitivity. Preferably, 3.1 ≤ TTL / d4 ≤ 16.1.

[0131] It should be noted that the air gap d4 between the second lens and the third lens refers to the distance on the optical axis from the second side surface of the second lens to the first side surface of the third lens.

[0132] In this embodiment, the total optical length (TTL) of the optical lens and the air gap (d10) between the fifth and sixth lenses satisfy the following: 1.30 ≤ TTL / d10 ≤ 7.40. Limiting TTL / d10 within a reasonable range facilitates smooth light transition, contributing to high assembly yield and low sensitivity. Preferably, 1.8 ≤ TTL / d10 ≤ 5.3.

[0133] It should be noted that the air gap d10 between the fifth and sixth lenses refers to the distance on the optical axis from the second side surface of the fifth lens to the first side surface of the sixth lens.

[0134] In this embodiment, the radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 0.2 ≤ R11 / d10 ≤ 4.5. By limiting R11 / d10 within a reasonable range, the relative position of the secondary reflection ghost image on the first side of the sixth lens can be changed, effectively reducing the relative energy value of the ghost image and improving the quality of the image formed by the optical lens. Preferably, 0.7 ≤ R11 / d10 ≤ 2.8.

[0135] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.31 ≤ F2 / F ≤ 10.50. By limiting F2 / F within a reasonable range, the influence of the second lens on the total focal length of the optical lens under high and low temperature conditions can be adjusted, effectively ensuring the performance of the optical lens under high and low temperature conditions. Preferably, 2.5 ≤ F2 / F ≤ 8.4.

[0136] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00 ≤ F3 / F ≤ -0.07. By limiting F3 / F within a reasonable range, the influence of the third lens on the total focal length of the optical lens under high and low temperature conditions can be adjusted, effectively ensuring the performance of the optical lens under these conditions. Preferably, -8.8 ≤ F3 / F ≤ -0.5.

[0137] In this embodiment, the total optical length (TTL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: 1.2 ≤ TTL / F ≤ 11.2. Limiting TTL / F within a reasonable range facilitates the miniaturization of the optical lens. Preferably, 2.5 ≤ TTL / F ≤ 9.6.

[0138] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003 ≤ H / TTL ≤ 0.580. By limiting H / TTL within a reasonable range, under the condition of the same image height, the shorter the total optical length of the optical lens, the more beneficial it is to achieve miniaturization. Preferably, 0.02 ≤ H / TTL ≤ 0.36.

[0139] In this embodiment, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001 ≤ BFL / TTL ≤ 0.290. By limiting BFL / TTL within a reasonable range, under the same image height, the back focal length BFL of the control system is relatively short, which is beneficial for miniaturization. Preferably, 0.01 ≤ BFL / TTL ≤ 0.19.

[0140] It should be noted that, in this embodiment, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens refers to the distance on the optical axis from the second side of the sixth lens to the imaging plane.

[0141] 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 following condition: 0.003 ≤ F / H ≤ 2.140. By limiting F / H to a reasonable range, the focal length and image height are controlled within a certain range, which is beneficial to improving resolution. Preferably, 0.02 ≤ F / H ≤ 1.85.

[0142] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009 ≤ D11 * BFL / H ≤ 6.400. By limiting D11 * BFL / H within a reasonable range, under the same imaging plane and the same image height, controlling the relatively long back focal length is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, 0.08 ≤ D11 * BFL / H ≤ 4.70.

[0143] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11 ≤ D11 / H ≤ 5.20. By limiting D11 / H within a reasonable range, under the same imaging surface and image height, a larger aperture of the first side of the last lens is beneficial for the principal ray to exit parallel onto the imaging surface, thereby facilitating the realization of a small CRA. Preferably, 0.6 ≤ D11 / H ≤ 3.4.

[0144] In this embodiment, the optical total length (TTL) of the optical lens and the maximum aperture (DMAX) corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.8 ≤ TTL / DMAX ≤ 12.0. By limiting TTL / DMAX within a reasonable range, the length of the optical lens can be effectively limited, which is beneficial for the compact structure of the entire optical lens and the realization of miniaturization. Preferably, 2.3 ≤ TTL / DMAX ≤ 8.

[0145] In this embodiment, the sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005 ≤ arctan(SAG11 / D11) ≤ 2.300. By limiting arctan(SAG11 / D11) within a reasonable range, the angle of the first side of the sixth lens is controlled by controlling the sagitta and aperture, so that the pupil image of the ghost image is far away from the focal plane, effectively reducing the energy value of the ghost image and improving the image quality of the lens. Preferably, 0.02 ≤ arctan(SAG11 / D11) ≤ 1.08.

[0146] In this embodiment, the center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21 ≤ d3 / d5 ≤ 7.50. Limiting d3 / d5 within a reasonable range facilitates smooth light transition, improves image resolution, and ensures good performance of the optical lens at both high and low temperatures. Preferably, 0.5 ≤ d3 / d5 ≤ 5.4.

[0147] In this embodiment, the focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05 ≤ F6 / H ≤ 40.00. By limiting F6 / H within a reasonable range, the focal length of the sixth lens is optimized. Combined with the positive optical power of the sixth lens, this facilitates light convergence and smooth convergence at the edge of the field of view, which is beneficial for achieving a small CRA (Current Field Reflection). Preferably, 1 ≤ F6 / H ≤ 35.

[0148] In this embodiment, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02 ≤ (d8 + d9) / TTL ≤ 0.55. By limiting (d8 + d9) / TTL within a reasonable range, that is, by reasonably setting the center thickness of the cemented lens, edge vignetting can be effectively reduced, edge light transmission can be increased, and relative illumination can be improved. Preferably, 0.05 ≤ (d8 + d9) / TTL ≤ 0.32.

[0149] In this embodiment, the sagitta of the first side surface SAG3 and the sagitta of the second side surface SAG4 of the second lens satisfy the following condition: 0.1 ≤ |SAG3 / SAG4| ≤ 2.7. By limiting |SAG3 / SAG4| to a reasonable range, that is, by reasonably controlling the sagitta of the two surfaces of the second lens, it is beneficial to a smooth transition of light, thereby reducing the sensitivity of the system. Preferably, 0.3 ≤ |SAG3 / SAG4| ≤ 1.5.

[0150] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5 ≤ |R1 / F| ≤ 96.0. By limiting |R1 / F| to a reasonable range, the radius of curvature of the first side surface of the first lens is reasonably allocated, which helps to balance various aberrations and achieve high resolution. Preferably, 1.2 ≤ |R1 / F| ≤ 88.0.

[0151] Example 2

[0152] like Figures 1 to 10 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has negative optical power; the second lens has positive optical power; the third lens has negative optical power; the fourth lens has positive optical power; the fifth lens has optical power; and the sixth lens has positive optical power. The focal length F2 of the second lens and the focal length F3 of the third lens satisfy the following condition: -6.80≤F2 / F3≤-0.06.

[0153] By setting the first lens to have negative optical power, it is beneficial to diverge light rays, separating the central and peripheral rays in each field of view, increasing the aperture, and enhancing the illumination of the optical lens. Simultaneously, it facilitates the correction of aberrations between the central and peripheral rays, achieving high resolution. By setting the second lens to have positive optical power, it converges light rays, resulting in a smooth transition in light path. By setting the third lens to have negative optical power, it diverges light rays, also resulting in a smooth transition in light path. By setting the fourth lens to have positive optical power, it facilitates light convergence.

[0154] By setting the fifth lens to have a negative optical power, it is beneficial to appropriately diffuse the light and ensure a smooth transition in the light path. Alternatively, the fifth lens can have a positive optical power, which converges the light, effectively converging the central and peripheral rays from each field of view, increasing system illumination, and facilitating the correction of aberrations in the central and peripheral rays to achieve high resolution. Setting the sixth lens to have a positive optical power further converges the light, further smoothing the light path and preventing light energy loss caused by excessive angles between the large field-of-view rays and the chip's principal ray when they reach the image plane, thus improving illumination in the peripheral fields of view. Limiting F2 / F3 within a reasonable range allows for the proper allocation of the focal lengths of the second and third lenses, aiding in thermal compensation and ensuring good performance of the entire optical system at both high and low temperatures, achieving excellent temperature performance.

[0155] Preferably, the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the following condition: -4.60≤F2 / F3≤-0.21.

[0156] By making the second side of the first lens concave, a large field of view of light can be collected to enter the rear optical system, allowing diverging light to enter smoothly and further smoothing the light path transition. Optionally, making the first side of the first lens convex can reduce the interference of water droplets on image quality in rainy applications. Designing the first lens as a meniscus can also maximize the collection of a large field of view of light into the rear optical system, increasing the amount of light transmitted.

[0157] Of course, the first side of the first lens can also be concave, which can allow the optical path difference between the edge field rays and the center field rays to accumulate rapidly, thereby correcting the aberrations of the edge field and improving resolution.

[0158] By making the first side of the second lens concave, light can enter the rear lens more smoothly, which helps improve image quality. Making the second side of the second lens convex can compress the angle of the incident light, achieving a smooth transition of light rays and further stabilizing the light path. This helps to compress the light collected at the front end and reduce the aperture of the rear lens.

[0159] By making the first side of the third lens convex, it is beneficial to collect the light from the front and smoothly transition it to the rear, reducing system sensitivity. Making the second side of the third lens concave allows the diverging light to smoothly enter the rear, further smoothing the light path transition.

[0160] By making the first side surface of the fourth lens convex, it is beneficial to collect the light emitted from the third lens. Optionally, the second side surface of the fourth lens is convex, that is, the fourth lens is biconvex and has a gentle shape, which can further compress the diverging light, allowing the light to enter smoothly into the rear and effectively compressing the aperture of the rear lens.

[0161] Of course, the second side of the fourth lens can also be concave, which is conducive to light diffusion, makes the light path transition smoothly, produces less aberration, and improves the system's resolving ability.

[0162] Optionally, the first side of the fifth lens is concave, the second side of the fifth lens is convex, and the fifth lens is a meniscus lens. Light rays are incident on the fifth lens almost perpendicularly, resulting in less light deflection and less light energy loss, while also helping to reduce the sensitivity of the fifth lens.

[0163] Of course, the first side of the fifth lens can also be convex, and the second side of the fifth lens can also be convex. This, in conjunction with the second side of the fourth lens, allows the light emitted from the fourth lens to be incident almost perpendicularly onto the first side of the fifth lens. This facilitates a smooth transition of light, reduces light energy loss, increases the illumination of the peripheral field of view, reduces the front diameter of the lens, and decreases its size, which is beneficial for miniaturization and cost reduction.

[0164] Optionally, the first side of the sixth lens is convex, the second side of the sixth lens is flat, and the lens shape is gentle, resulting in less light deflection and less light energy loss. This can effectively correct astigmatism and field curvature, and improve the resolving power of the optical system.

[0165] Of course, the first side of the sixth lens can also be convex and the second side of the sixth lens can be concave, so that the light rays have a longer optical path to reach the image plane after passing through the sixth lens, which is beneficial to realizing small CRA.

[0166] Of course, it is also possible to choose a first side surface of the sixth lens to be convex, a second side surface of the sixth lens to be convex, and a flat shape of the sixth lens, which is conducive to a smooth transition of light and tends to be perpendicular to the incident light, which is conducive to reducing aberrations, improving resolution, and reducing the sensitivity of the sixth lens.

[0167] In this embodiment, both the second and third lenses are aspherical lenses. This helps to improve field curvature and astigmatism, enhance resolution, and reduce distortion.

[0168] In this embodiment, the optical lens also includes an aperture stop, which is located between the third lens and the fourth lens. This facilitates the effective focusing of light entering the optical system, and the aperture stop's central location within the optical system helps correct off-axis aberrations and improves resolution.

[0169] In this embodiment, the fourth and fifth lenses are cemented together to form a cemented lens. This facilitates a smooth transition of light rays emitted from the front lens to the rear optical system, allowing for adequate correction of various aberrations in the optical system, improving resolution, and optimizing optical performance such as distortion and CRA. The cemented lens configuration also reduces the air gap between the fourth and fifth lenses, decreasing the overall lens length and the number of assembly components between the two lenses, thus reducing manufacturing processes and costs. Furthermore, the cemented fourth and fifth lenses are dispersive complements, which helps reduce chromatic aberration and further reduces field curvature, correcting off-axis point aberrations and improving image quality.

[0170] In this embodiment, the focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following relationship: 0.1 ≤ F45 / F ≤ 4.8. Limiting F45 / F within a reasonable range facilitates the rational allocation of the cemented lens focal length, allowing light to enter the optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, 0.7 ≤ F45 / F ≤ 2.7.

[0171] In this embodiment, the radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38 ≤ |R3 / R4| ≤ 5.60. Limiting |R3 / R4| within a reasonable range helps control the radius of curvature of the first side surface of the second lens and the radius of curvature of the second side surface of the second lens, which facilitates smooth light transition, improves resolution, and ensures good performance of the entire optical lens at both high and low temperatures. Preferably, 0.57 ≤ |R3 / R4| ≤ 3.50.

[0172] In this embodiment, the radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08 ≤ |R5 / R6| ≤ 12.30. By limiting |R5 / R6| to a reasonable range, the radii of curvature of the first and second sides of the third lens can be controlled, which is beneficial for achieving a smooth light transition, improving resolution, and ensuring good performance of the entire optical lens at both high and low temperatures. Preferably, 0.6 ≤ |R5 / R6| ≤ 9.2.

[0173] In this embodiment, the total optical length (TTL) of the optical lens and the air gap (d4) between the second and third lenses satisfy the following condition: 1.3 ≤ TTL / d4 ≤ 18.2. Limiting TTL / d4 within a reasonable range facilitates smooth light transition, contributing to high assembly yield and low sensitivity. Preferably, 3.1 ≤ TTL / d4 ≤ 16.1.

[0174] It should be noted that the air gap d4 between the second lens and the third lens refers to the distance on the optical axis from the second side surface of the second lens to the first side surface of the third lens.

[0175] In this embodiment, the total optical length (TTL) of the optical lens and the air gap (d10) between the fifth and sixth lenses satisfy the following: 1.30 ≤ TTL / d10 ≤ 7.40. Limiting TTL / d10 within a reasonable range facilitates smooth light transition, contributing to high assembly yield and low sensitivity. Preferably, 1.8 ≤ TTL / d10 ≤ 5.3.

[0176] It should be noted that the air gap d10 between the fifth and sixth lenses refers to the distance on the optical axis from the second side surface of the fifth lens to the first side surface of the sixth lens.

[0177] In this embodiment, the radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth and sixth lenses satisfy the following condition: 0.2 ≤ R11 / d10 ≤ 4.5. By limiting R11 / d10 within a reasonable range, the relative position of the secondary reflection ghost image on the first side of the sixth lens can be changed, effectively reducing the relative energy value of the ghost image and improving the quality of the image formed by the optical lens. Preferably, 0.7 ≤ R11 / d10 ≤ 2.8.

[0178] In this embodiment, the focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.31 ≤ F2 / F ≤ 10.50. By limiting F2 / F within a reasonable range, the influence of the second lens on the total focal length of the optical lens under high and low temperature conditions can be adjusted, effectively ensuring the performance of the optical lens under high and low temperature conditions. Preferably, 2.5 ≤ F2 / F ≤ 8.4.

[0179] In this embodiment, the focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00 ≤ F3 / F ≤ -0.07. By limiting F3 / F within a reasonable range, the influence of the third lens on the total focal length of the optical lens under high and low temperature conditions can be adjusted, effectively ensuring the performance of the optical lens under these conditions. Preferably, -8.8 ≤ F3 / F ≤ -0.5.

[0180] In this embodiment, the total optical length (TTL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: 1.2 ≤ TTL / F ≤ 11.2. Limiting TTL / F within a reasonable range facilitates the miniaturization of the optical lens. Preferably, 2.5 ≤ TTL / F ≤ 9.6.

[0181] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003 ≤ H / TTL ≤ 0.580. By limiting H / TTL within a reasonable range, under the condition of the same image height, the shorter the total optical length of the optical lens, the more beneficial it is to achieve miniaturization. Preferably, 0.02 ≤ H / TTL ≤ 0.36.

[0182] In this embodiment, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001 ≤ BFL / TTL ≤ 0.290. By limiting BFL / TTL within a reasonable range, under the same image height, the back focal length BFL of the control system is relatively short, which is beneficial for miniaturization. Preferably, 0.01 ≤ BFL / TTL ≤ 0.19.

[0183] It should be noted that, in this embodiment, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens refers to the distance on the optical axis from the second side of the sixth lens to the imaging plane.

[0184] 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 following condition: 0.003 ≤ F / H ≤ 2.140. By limiting F / H to a reasonable range, the focal length and image height are controlled within a certain range, which is beneficial to improving resolution. Preferably, 0.02 ≤ F / H ≤ 1.85.

[0185] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009 ≤ D11 * BFL / H ≤ 6.400. By limiting D11 * BFL / H within a reasonable range, under the same imaging plane and the same image height, controlling the relatively long back focal length is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, 0.08 ≤ D11 * BFL / H ≤ 4.70.

[0186] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11 ≤ D11 / H ≤ 5.20. By limiting D11 / H within a reasonable range, under the same imaging surface and image height, a larger aperture of the first side of the last lens is beneficial for the principal ray to exit parallel onto the imaging surface, thereby facilitating the realization of a small CRA. Preferably, 0.6 ≤ D11 / H ≤ 3.4.

[0187] In this embodiment, the optical total length (TTL) of the optical lens and the maximum aperture (DMAX) corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.8 ≤ TTL / DMAX ≤ 12.0. By limiting TTL / DMAX within a reasonable range, the length of the optical lens can be effectively limited, which is beneficial for the compact structure of the entire optical lens and the realization of miniaturization. Preferably, 2.3 ≤ TTL / DMAX ≤ 8.

[0188] In this embodiment, the sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005 ≤ arctan(SAG11 / D11) ≤ 2.300. By limiting arctan(SAG11 / D11) within a reasonable range, the angle of the first side of the sixth lens is controlled by controlling the sagitta and aperture, so that the pupil image of the ghost image is far away from the focal plane, effectively reducing the energy value of the ghost image and improving the image quality of the lens. Preferably, 0.02 ≤ arctan(SAG11 / D11) ≤ 1.08.

[0189] In this embodiment, the center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21 ≤ d3 / d5 ≤ 7.50. Limiting d3 / d5 within a reasonable range facilitates smooth light transition, improves image resolution, and ensures good performance of the optical lens at both high and low temperatures. Preferably, 0.5 ≤ d3 / d5 ≤ 5.4.

[0190] In this embodiment, the focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05 ≤ F6 / H ≤ 40.00. By limiting F6 / H within a reasonable range, the focal length of the sixth lens is optimized. Combined with the positive optical power of the sixth lens, this facilitates light convergence and smooth convergence at the edge of the field of view, which is beneficial for achieving a small CRA (Current Field Reflection). Preferably, 1 ≤ F6 / H ≤ 35.

[0191] In this embodiment, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02 ≤ (d8 + d9) / TTL ≤ 0.55. By limiting (d8 + d9) / TTL within a reasonable range, that is, by reasonably setting the center thickness of the cemented lens, edge vignetting can be effectively reduced, edge light transmission can be increased, and relative illumination can be improved. Preferably, 0.05 ≤ (d8 + d9) / TTL ≤ 0.32.

[0192] In this embodiment, the sagitta of the first side surface SAG3 and the sagitta of the second side surface SAG4 of the second lens satisfy the following condition: 0.1 ≤ |SAG3 / SAG4| ≤ 2.7. By limiting |SAG3 / SAG4| to a reasonable range, that is, by reasonably controlling the sagitta of the two surfaces of the second lens, it is beneficial to a smooth transition of light, thereby reducing the sensitivity of the system. Preferably, 0.3 ≤ |SAG3 / SAG4| ≤ 1.5.

[0193] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5 ≤ |R1 / F| ≤ 96.0. By limiting |R1 / F| to a reasonable range, the radius of curvature of the first side surface of the first lens is reasonably allocated, which helps to balance various aberrations and achieve high resolution. Preferably, 1.2 ≤ |R1 / F| ≤ 88.0.

[0194] It should be noted that the total length TTL of the optical lens is the distance from the first side of the first lens to the imaging plane of the optical lens, and the optical back focal length BFL is the distance from the last lens to the imaging plane of the optical lens.

[0195] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0196] It should be noted that, in this application, the front port diameter D of the optical lens is the maximum light-transmitting aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens.

[0197] The optical lens in this application may employ multiple lenses, such as the six lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Specifically, when the imaging quality of the optical lens is of primary concern, all six lenses may be aspherical lenses.

[0198] In an exemplary embodiment, the first to 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 avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, the first to sixth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to sixth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to 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 for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[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] Example 1

[0203] like Figure 1 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging surface IMA.

[0204] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is flat. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0205] In this example, the focal length F of the optical lens is 6.5100mm, the total length TTL of the optical lens is 36.0000mm, and the maximum field of view FOV of the optical lens is 45.2766°.

[0206] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0207] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0208]

[0209]

[0210] Table 1

[0211] In this example, the second and third lenses are aspherical lenses. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0212]

[0213] Where x is the distance vector from the vertex of the aspherical surface along the optical axis at a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; and A is the higher-order coefficient. Table 2 below shows the conic coefficient k and the higher-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the aspherical lens surface in this example.

[0214] Surf k A B C D E F G 3 -0.6877 -4.9627E-04 9.7161E-05 -1.2824E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.0846 -4.3798E-04 1.1592E-05 -2.7214E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 2.6073 3.5518E-03 -1.6217E-04 3.4594E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -4.6831 6.0556E-03 -1.7422E-04 -2.8861E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0215] Table 2

[0216] Example 2

[0217] like Figure 2 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0218] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is flat. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0219] In this example, the focal length F of the optical lens is 7.8979mm, the total length TTL of the optical lens is 32.0062mm, and the maximum field of view FOV of the optical lens is 36.9014°.

[0220] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0221] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0222] Surf Radius Thickness Nd Vd 1 18.630 2.040 1.7800 49.6100 2 5.346 2.580 3 -16.990 2.254 1.6400 23.5300 4 -20.838 3.177 5 9.535 1.532 1.5800 30.1500 6 7.743 0.724 STO unlimited 0.000 8 6.801 4.000 1.7000 55.5300 9 -4.937 0.800 1.8500 23.7900 10 -12.095 11.000 11 14.000 2.000 1.8040 46.5680 12 unlimited 0.500 13 unlimited 1.100 1.5098 62.9110 14 unlimited 0.300 IMA

[0223] Table 3

[0224] In this example, the second and third lenses are aspherical lenses. Table 4 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0225] Surf k A B C D E F G 3 -0.6227 5.4370E-04 -4.4361E-05 -9.3874E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.5165 3.6565E-04 1.2298E-04 2.7143E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 6.2429 3.7064E-03 -5.7103E-05 2.4065E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -6.6251 6.0582E-03 1.9089E-05 4.9021E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0226] Table 4

[0227] Example 3

[0228] like Figure 3 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0229] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive optical power, and its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, and its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0230] In this example, the focal length F of the optical lens is 4.9333mm, the total length TTL of the optical lens is 39.9521mm, and the maximum field of view FOV of the optical lens is 64.7269°.

[0231] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0233] Surf Radius Thickness Nd Vd 1 -18.630 2.040 1.7800 49.6100 2 5.346 2.580 3 -3.677 2.188 1.6400 23.5300 4 -3.843 6.964 5 11.145 1.698 1.5800 30.1500 6 6.004 1.032 STO unlimited 0.000 8 8.667 3.798 1.7000 55.5300 9 -5.381 0.800 1.8500 23.7900 10 -10.971 14.952 11 14.000 2.000 1.8040 46.5680 12 -50.000 0.500 13 unlimited 1.100 1.5098 62.911 14 unlimited 0.300 IMA

[0234] Table 5

[0235] In this example, the second and third lenses are aspherical lenses. Table 6 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0236] Surf k A B C D E F G 3 -0.6877 -4.9627E-04 9.7161E-05 -1.2824E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.0846 -4.3798E-04 1.1592E-05 -2.7214E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 2.6073 3.5518E-03 -1.6217E-04 3.4594E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -4.6831 6.0556E-03 -1.7422E-04 -2.8861E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0237] Table 6

[0238] Example 4

[0239] like Figure 4 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0240] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive optical power, and its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, and its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, and its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, and its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, and its first side surface S11 is convex, and its second side surface S12 is convex. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0241] In this example, the focal length F of the optical lens is 6.7980mm, the total length TTL of the optical lens is 35.9718mm, and the maximum field of view FOV of the optical lens is 46.3757°.

[0242] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0243] Table 7 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0244] Surf Radius Thickness Nd Vd 1 -20.368 1.055 1.7800 49.6100 2 5.781 1.668 3 -3.850 2.385 1.6400 23.5300 4 -3.755 5.903 5 10.338 1.034 1.5800 30.1500 6 7.108 0.934 STO unlimited 0.000 8 9.254 2.984 1.7000 55.5300 9 -4.722 0.775 1.8500 23.7900 10 -11.533 15.333 11 14.000 2.000 1.8040 46.5680 12 -35.000 0.500 13 unlimited 1.100 1.5098 62.9110 14 unlimited 0.300 IMA

[0245] Table 7

[0246] In this example, the second and third lenses are aspherical lenses. Table 8 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0247] Surf k A B C D E F G 3 -0.8364 -7.3635E-05 1.6842E-04 -7.5394E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.0064 -6.0295E-04 1.6486E-05 2.3201E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 5.0797 3.7351E-03 -1.1999E-04 1.0082E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -4.4397 6.3676E-03 -1.0583E-04 9.0473E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0248] Table 8

[0249] Example 5

[0250] like Figure 5 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0251] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0252] In this example, the focal length F of the optical lens is 6.5500mm, the total length TTL of the optical lens is 36.5914mm, and the maximum field of view FOV of the optical lens is 46.4251°.

[0253] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0254] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0255]

[0256]

[0257] Table 9

[0258] In this example, the second and third lenses are aspherical lenses. Table 10 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0259] Surf k A B C C E F G 3 -0.3816 -7.9514E-04 4.0133E-05 -2.0730E-05 6.3050E-08 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.1946 -3.2577E-04 -2.6599E-05 -3.6290E-06 5.0340E-08 0.0000E+00 0.0000E+00 0.0000E+00 5 3.0167 3.5867E-03 -1.6627E-04 5.4973E-06 -5.7176E-08 0.0000E+00 0.0000E+00 0.0000E+00 6 -4.8073 6.0957E-03 -1.3325E-04 -4.8278E-07 5.13E-07 0.0000E+00 0.0000E+00 0.0000E+00

[0260] Table 10

[0261] Example 6

[0262] like Figure 6 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0263] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0264] In this example, the focal length F of the optical lens is 6.3956mm, the total length TTL of the optical lens is 38.0000mm, and the maximum field of view FOV of the optical lens is 46.4770°.

[0265] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0266] Table 11 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0267] Surf Radius Thickness Nd Vd 1 -538.435 3.800 1.7800 49.6100 2 6.377 3.410 3 -4.136 2.360 1.6400 23.5300 4 -4.161 6.000 5 10.265 2.419 1.5800 30.1500 6 6.268 1.014 STO unlimited 0.000 8 7.330 2.174 1.7000 55.5300 9 -5.510 1.000 1.8500 23.7900 10 -15.987 12.000 11 14.000 2.000 1.8040 46.5680 12 15.000 0.500 13 unlimited 1.100 1.5098 62.911 14 unlimited 0.300 IMA

[0268] Table 11

[0269] In this example, the second and third lenses are aspherical lenses. Table 12 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0270] Surf k A B C C E F G 3 -0.3816 -7.9514E-04 4.0133E-05 -2.0730E-05 6.3050E-08 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.1946 -3.2577E-04 -2.6599E-05 -3.6290E-06 5.0340E-08 0.0000E+00 0.0000E+00 0.0000E+00 5 3.0167 3.5867E-03 -1.6627E-04 5.4973E-06 -5.7176E-08 0.0000E+00 0.0000E+00 0.0000E+00 6 -4.8073 6.0957E-03 -1.3325E-04 -4.8278E-07 5.13E-07 0.0000E+00 0.0000E+00 0.0000E+00

[0271] Table 12

[0272] Example 7

[0273] like Figure 7 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0274] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0275] In this example, the focal length F of the optical lens is 6.5526mm, the total length TTL of the optical lens is 35.5000mm, and the maximum field of view FOV of the optical lens is 45.4469°.

[0276] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0277] Table 13 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0278] Surf Radius Thickness Nd Vd 1 47.719 1.274 1.7800 49.6100 2 5.344 3.075 3 -8.696 2.062 1.6400 23.5300 4 -5.915 7.553 5 12.266 1.407 1.5800 30.1500 6 6.459 0.787 STO unlimited 0.000 8 7.662 3.441 1.7000 55.5300 9 -5.852 1.000 1.8500 23.7900 10 -12.535 11.000 11 14.000 2.000 1.8040 46.5680 12 15.000 0.500 13 unlimited 1.100 1.5098 62.911 14 unlimited 0.300 IMA

[0279] Table 13

[0280] In this example, the second and third lenses are aspherical lenses. Table 14 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0281] Surf k A B C D E F G 3 -0.7407 -6.8878E-04 3.4830E-05 -1.0182E-05 2.8917E-07 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.1500 -4.1698E-04 -1.0360E-06 -3.6196E-06 7.7513E-08 0.0000E+00 0.0000E+00 0.0000E+00 5 1.9623 3.4646E-03 -1.4972E-04 4.2738E-06 3.2927E-08 0.0000E+00 0.0000E+00 0.0000E+00 6 -5.0174 5.9559E-03 -1.8220E-04 9.0755E-07 4.31E-07 0.0000E+00 0.0000E+00 0.0000E+00

[0282] Table 14

[0283] Example 8

[0284] like Figure 8 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0285] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 has negative optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0286] In this example, the focal length F of the optical lens is 7.4186mm, the total length TTL of the optical lens is 37.5711mm, and the maximum field of view FOV of the optical lens is 36.7871°.

[0287] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is convex, and the first side surface S9 of the fifth lens is concave.

[0288] Table 15 shows the basic structural parameters of the optical lens in Example 8, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0289] Surf Radius Thickness Nd Vd 1 47.719 1.274 1.7800 49.6100 2 5.344 1.700 3 -8.696 2.062 1.6400 23.5300 4 -5.915 8.000 5 12.266 1.407 1.5800 30.1500 6 6.459 0.787 STO unlimited 0.000 8 7.662 3.441 1.7000 55.5300 9 -5.852 1.000 1.8500 23.7900 10 -12.535 14.000 11 14.000 2.000 1.8040 46.5680 12 15.000 0.500 13 unlimited 1.100 1.5098 62.911 14 unlimited 0.300 IMA

[0290] Table 15

[0291] In this example, the second and third lenses are aspherical lenses. Table 16 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0292] Surf k A B C D E F G 3 -0.7407 -6.8878E-04 3.4830E-05 -1.0182E-05 2.8917E-07 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.1500 -4.1698E-04 -1.0360E-06 -3.6196E-06 7.7513E-08 0.0000E+00 0.0000E+00 0.0000E+00 5 1.9623 3.4646E-03 -1.4972E-04 4.2738E-06 3.2927E-08 0.0000E+00 0.0000E+00 0.0000E+00 6 -5.0174 5.9559E-03 -1.8220E-04 9.0755E-07 4.31E-07 0.0000E+00 0.0000E+00 0.0000E+00

[0293] Table 16

[0294] Example 9

[0295] like Figure 9 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0296] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is flat. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0297] In this example, the focal length F of the optical lens is 6.5086mm, the total length TTL of the optical lens is 34.4017mm, and the maximum field of view FOV of the optical lens is 45.8546°.

[0298] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0299] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0300]

[0301]

[0302] Table 17

[0303] In this example, the second and third lenses are aspherical lenses. Table 18 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0304] Surf k A B C D E F G 3 -0.8856 -1.7132E-04 1.9228E-04 -2.3388E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.2513 -1.0083E-04 4.2481E-05 1.9423E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 77.3099 3.8449E-03 -1.4920E-04 -6.1788E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -3.3413 6.1000E-03 -2.2282E-04 -1.1822E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0305] Table 18

[0306] Example 10

[0307] like Figure 10 As shown, the optical lens, from the object side to the image side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, an aperture stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a protective glass, and an imaging plane IMA. For the sake of brevity, the omitted parts are similar to the description in Example 1.

[0308] The first lens L1 has negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S5 is convex, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is flat. The protective glass has a first side surface S13 and a second side surface S14. Light from the object passes sequentially through surfaces S1 to S14 and is finally imaged onto the imaging plane IMA.

[0309] In this example, the focal length F of the optical lens is 6.4900mm, the total length TTL of the optical lens is 36.5553mm, and the maximum field of view FOV of the optical lens is 45.2620°.

[0310] In this example, the fourth and fifth lenses are cemented lenses, so the second side surface of the fourth lens and the first side surface of the fifth lens are both S9. However, for the first and second side surfaces, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S9 of the fourth lens is concave, and the first side surface S9 of the fifth lens is convex.

[0311] Table 19 shows the basic structural parameters of the optical lens in Example 10, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0312] Surf Radius Thickness Nd Vd 1 103.306 1.235 1.7800 49.6100 2 9.451 2.637 3 -3.766 2.165 1.6400 23.5300 4 -3.836 8.032 5 38.284 1.592 1.5800 30.1500 6 5.369 0.995 STO unlimited 0.000 8 8.588 1.999 1.7000 55.5300 9 36.917 2.000 1.8500 23.7900 10 -11.384 12.000 11 11.009 2.000 1.8040 46.5680 12 unlimited 0.500 13 unlimited 1.100 1.5098 62.911 14 unlimited 0.300 IMA

[0313] Table 19

[0314] In this example, the second and third lenses are aspherical lenses. Table 20 shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0315] Surf k A B C D E F G 3 -0.9010 -1.2415E-04 1.9249E-04 -2.4932E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 4 -1.2098 -1.6456E-04 4.0751E-05 1.9520E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 5 75.1885 3.8357E-03 -1.5105E-04 -6.2844E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 6 -3.3625 6.0944E-03 -2.2086E-04 -1.1475E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0316] Table 20

[0317] In summary, Examples 1 through 2 completely satisfy the relationships shown in Table 21.

[0318]

[0319]

[0320] Table 21

[0321] Table 22 gives the complete set of focal length values ​​F for the optical lenses of Examples 1 to 10, and the focal length values ​​F1 to F6 (unit: mm) for each lens.

[0322]

[0323]

[0324] Table 22

[0325] 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.

[0326] 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.

[0327] 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.

[0328] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens has a total of six lenses, including: A first lens, the first lens having negative optical power, and the second side surface of the first lens being concave; The second lens has positive optical power, the first side of the second lens is concave, and the second side of the second lens is convex; The third lens has negative optical power, the first side of the third lens is convex, and the second side of the third lens is concave. The fourth lens has positive optical power, and the first side surface of the fourth lens is convex. The fifth lens has optical power, and the second side surface of the fifth lens is convex. The sixth lens has positive optical power, and the first side surface of the sixth lens is convex. The focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.5 ≤ F2 / F ≤ 8.4; 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: 0.9554≤F / H≤1.

85.

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

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

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

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

6. The optical lens according to claim 1, characterized in that, The fifth lens has negative optical power, and the first side surface of the fifth lens is concave.

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

8. The optical lens according to claim 1, characterized in that, The second side surface of the sixth lens is a plane.

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

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

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

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

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

14. The optical lens according to claim 13, characterized in that, The focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: 0.1≤F45 / F≤4.

8.

15. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F2 of the second lens and the focal length F3 of the third lens satisfy the following condition: -6.80≤F2 / F3≤-0.

06.

16. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38≤|R3 / R4|≤5.

60.

17. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08≤|R5 / R6|≤12.

30.

18. The optical lens according to any one of claims 1 to 14, characterized in that, The total optical length TTL of the optical lens and the air gap d4 between the second lens and the third lens satisfy the following condition: 1.3≤TTL / d4≤18.

2.

19. The optical lens according to any one of claims 1 to 14, characterized in that, The total optical length TTL of the optical lens and the air gap d10 between the fifth lens and the sixth lens satisfy the following condition: 1.30≤TTL / d10≤7.

40.

20. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth lens and the sixth lens satisfy the following condition: 0.2≤R11 / d10≤4.

5.

21. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00≤F3 / F≤-0.

07.

22. The optical lens according to any one of claims 1 to 14, characterized in that, The total optical length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.2≤TTL / F≤11.

2.

23. The optical lens according to any one of claims 1 to 14, characterized in that, The image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003≤H / TTL≤0.

580.

24. The optical lens according to any one of claims 1 to 14, characterized in that, The distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001≤BFL / TTL≤0.

290.

25. The optical lens according to any one of claims 1 to 14, characterized in that, The maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009≤D11*BFL / H≤6.

400.

26. The optical lens according to any one of claims 1 to 14, characterized in that, The maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11≤D11 / H≤5.

20.

27. The optical lens according to any one of claims 1 to 14, characterized in that, The optical total length TTL of the optical lens and the maximum aperture DMAX corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.8≤TTL / DMAX≤12.

0.

28. The optical lens according to any one of claims 1 to 14, characterized in that, The sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005≤arctan(SAG11 / D11)≤2.

300.

29. The optical lens according to any one of claims 1 to 14, characterized in that, The center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21≤d3 / d5≤7.

50.

30. The optical lens according to any one of claims 1 to 14, characterized in that, The focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05≤F6 / H≤40.

00.

31. The optical lens according to any one of claims 1 to 14, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02≤(d8+d9) / TTL≤0.

55.

32. The optical lens according to any one of claims 1 to 14, characterized in that, The sagitta of the first side surface of the second lens, SAG3, and the sagitta of the second side surface of the second lens, SAG4, satisfy the following condition: 0.1≤|SAG3 / SAG4|≤2.

7.

33. The optical lens according to any one of claims 1 to 14, characterized in that, The radius of curvature R1 of the first side of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5 ≤ |R1 / F| ≤ 96.

0.

34. The optical lens according to any one of claims 1 to 14, characterized in that, The following conditions must be met: 0.01≤BFL / TTL≤0.29, 0.08≤D11*BFL / H≤4.70, 0.02≤arctan(SAG11 / D11))≤1.08, wherein the distance from the second side of the last lens of the optical lens to the imaging plane of the optical lens is BFL, the total optical length of the optical lens is TTL, the image height corresponding to the maximum field of view of the optical lens is H, the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the sagitta of the first side of the sixth lens is SAG11, and the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11.

35. The optical lens according to any one of claims 1 to 14, characterized in that, The following conditions must be met: 0.7≤F45 / F≤2.7, -4.60≤F2 / F3≤-0.21, 0.57≤|R3 / R4|≤3.50, 0.6≤|R5 / R6|≤9.2, 3.1≤TTL / d4≤16.1, 1.8≤TTL / d10≤5.3, 0.7≤R11 / d10≤2.8, -8.8≤F3 / F≤-0.5, 2.5≤TTL / F≤9.6, 0.02≤H / TTL≤0.36, 0.01≤BFL / TTL≤0.19, 0.6≤D11 / H≤ 3.4, 2.3≤TTL / DMAX≤8, 0.5≤d3 / d5≤5.4, 1≤F6 / H≤35, 0.05≤(d8+d9) / TTL≤0.32, 0.3≤|SAG3 / SAG4|≤1.5, 1.2≤|R1 / F|≤88.0, where the focal length of the second lens is F2, the focal length of the third lens is F3, the radius of curvature of the first side of the second lens is R3, the radius of curvature of the second side of the second lens is R4, the radius of curvature of the first side of the third lens is R5, and the radius of curvature of the second side of the third lens is R6 / H≤35. The radius of curvature is R6, the total optical length of the optical lens is TTL, the air gap between the second and third lenses is d4, the air gap between the fifth and sixth lenses is d10, the radius of curvature of the first side surface of the sixth lens is R11, the focal length of the entire optical lens group is F, the fourth and fifth lenses are cemented together to form a cemented lens, the focal length of the cemented lens is F45, the image height corresponding to the maximum field of view of the optical lens is H, and the distance from the second side surface of the last lens of the optical lens to the imaging plane of the optical lens is BFL. The maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the maximum light-transmitting aperture corresponding to the maximum field of view of the optical lens is DMAX, the center thickness of the second lens is d3, the center thickness of the third lens is d5, the focal length of the sixth lens is F6, the center thickness of the fourth lens is d8, the center thickness of the fifth lens is d9, the sagitta of the first side of the second lens is SAG3, the sagitta of the second side of the second lens is SAG4, and the radius of curvature of the first side of the first lens is R1.

36. The optical lens according to any one of claims 1 to 14, characterized in that, The following conditions must be met: -2.6774≤F2 / F3≤-0.4988, 0.9569≤|R3 / R4|≤1.7500, 1.4546≤|R5 / R6|≤7.1304, 4.5515≤TTL / d4≤14.1997, 2.3460≤TTL / d10≤3.2727, 0.9130≤R11 / d10≤1.2727, 3.0226≤F2 / F≤6.5169, -6.5105≤F3 / F≤-1.6818, 0.9731≤F45 / F≤1.7046, 4.0525≤TTL / F≤8.0985, 0.1242≤H / TTL≤0.1613, 0. 0476≤BFL / TTL≤0.0594, 0.9554≤F / H≤1.5295, 2.0187≤D11*BFL / H≤2.6190, 1.0625≤D11 / H≤1.3784, 4.0269≤TTL / DMAX≤5.8029, 0.0487≤arctan(SAG1 1 / D11))≤0.0724,0.8121≤d3 / d5≤2.3062,2.4532≤F6 / H≤29.0382,0.0835≤ (d8+d9) / TTL≤0.1500, 0.5575≤|SAG3 / SAG4|≤0.9676, 2.3588≤|R1 / F|≤84.1886, wherein the focal length of the second lens is F2, the focal length of the third lens is F3, the radius of curvature of the first side surface of the second lens is R3, the radius of curvature of the second side surface of the second lens is R4, the radius of curvature of the first side surface of the third lens is R5, the radius of curvature of the second side surface of the third lens is R6, the total optical length of the optical lens is TTL, the air gap between the second and third lenses is d4, the air gap between the fifth and sixth lenses is d10, the radius of curvature of the first side surface of the sixth lens is R11, the total focal length of the optical lens group is F, the fourth and fifth lenses are cemented together to form a cemented lens, the focal length of the cemented lens is F45, and the maximum field of view of the optical lens corresponds to... The image height is H, the distance from the second side of the last lens of the optical lens to the imaging plane of the optical lens is BFL, the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the maximum aperture corresponding to the maximum field of view of the optical lens is DMAX, the sagitta of the first side of the sixth lens is SAG11, the center thickness of the second lens is d3, the center thickness of the third lens is d5, the focal length of the sixth lens is F6, the center thickness of the fourth lens is d8, the center thickness of the fifth lens is d9, the sagitta of the first side of the second lens is SAG3, the sagitta of the second side of the second lens is SAG4, and the radius of curvature of the first side of the first lens is R1.

37. An optical lens, characterized in that, The optical lens has a total of six lenses, including: A first lens, the first lens having negative optical power; A second lens, the second lens having positive optical power; A third lens, wherein the third lens has negative optical power; A fourth lens, wherein the fourth lens has positive optical power; The fifth lens has optical power; The sixth lens has positive optical power; Wherein, the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the following condition: -6.80≤F2 / F3≤-0.06; The focal length F2 of the second lens and the total focal length F of the optical lens satisfy the following condition: 2.5 ≤ F2 / F ≤ 8.4; 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: 0.9554≤F / H≤1.

85.

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

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

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

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

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

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

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

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

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

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

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

49. The optical lens according to claim 37, characterized in that, Both the second lens and the third lens are aspherical lenses.

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

51. The optical lens according to claim 37, characterized in that, The fourth lens and the fifth lens are cemented together to form a cemented lens.

52. The optical lens according to claim 51, characterized in that, The focal length F45 of the cemented lens and the total focal length F of the optical lens satisfy the following condition: 0.1≤F45 / F≤4.

8.

53. The optical lens according to any one of claims 37 to 52, characterized in that, The radius of curvature R3 of the first side surface of the second lens and the radius of curvature R4 of the second side surface of the second lens satisfy the following condition: 0.38≤|R3 / R4|≤5.

60.

54. The optical lens according to any one of claims 37 to 52, characterized in that, The radius of curvature R5 of the first side surface of the third lens and the radius of curvature R6 of the second side surface of the third lens satisfy the following condition: 0.08≤|R5 / R6|≤12.

30.

55. The optical lens according to any one of claims 37 to 52, characterized in that, The total optical length TTL of the optical lens and the air gap d4 between the second lens and the third lens satisfy the following condition: 1.3≤TTL / d4≤18.

2.

56. The optical lens according to any one of claims 37 to 52, characterized in that, The total optical length TTL of the optical lens and the air gap d10 between the fifth lens and the sixth lens satisfy the following condition: 1.30≤TTL / d10≤7.

40.

57. The optical lens according to any one of claims 37 to 52, characterized in that, The radius of curvature R11 of the first side of the sixth lens and the air gap d10 between the fifth lens and the sixth lens satisfy the following condition: 0.2≤R11 / d10≤4.

5.

58. The optical lens according to any one of claims 37 to 52, characterized in that, The focal length F3 of the third lens and the total focal length F of the optical lens satisfy the following condition: -15.00≤F3 / F≤-0.

07.

59. The optical lens according to any one of claims 37 to 52, characterized in that, The total optical length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.2≤TTL / F≤11.

2.

60. The optical lens according to any one of claims 37 to 52, characterized in that, The image height H corresponding to the maximum field of view of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.003≤H / TTL≤0.

580.

61. The optical lens according to any one of claims 37 to 52, characterized in that, The distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens and the total optical length TTL of the optical lens satisfy the following condition: 0.001≤BFL / TTL≤0.

290.

62. The optical lens according to any one of claims 37 to 52, characterized in that, The maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens, the distance BFL from the second side of the last lens of the optical lens to the imaging plane of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.009≤D11*BFL / H≤6.

400.

63. The optical lens according to any one of claims 37 to 52, characterized in that, The maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.11≤D11 / H≤5.

20.

64. The optical lens according to any one of claims 37 to 52, characterized in that, The optical total length TTL of the optical lens and the maximum aperture DMAX corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.8≤TTL / DMAX≤12.

0.

65. The optical lens according to any one of claims 37 to 52, characterized in that, The sagitta SAG11 of the first side of the sixth lens and the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.005≤arctan(SAG11 / D11)≤2.

300.

66. The optical lens according to any one of claims 37 to 52, characterized in that, The center thickness d3 of the second lens and the center thickness d5 of the third lens satisfy the following condition: 0.21≤d3 / d5≤7.

50.

67. The optical lens according to any one of claims 37 to 52, characterized in that, The focal length F6 of the sixth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.05≤F6 / H≤40.

00.

68. The optical lens according to any one of claims 37 to 52, characterized in that, The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length TTL of the optical lens satisfy the following condition: 0.02≤(d8+d9) / TTL≤0.

55.

69. The optical lens according to any one of claims 37 to 52, characterized in that, The sagitta of the first side surface of the second lens, SAG3, and the sagitta of the second side surface of the second lens, SAG4, satisfy the following condition: 0.1≤|SAG3 / SAG4|≤2.

7.

70. The optical lens according to any one of claims 37 to 52, characterized in that, The radius of curvature R1 of the first side of the first lens and the focal length F of the optical lens satisfy the following condition: 0.5 ≤ |R1 / F| ≤ 96.

0.

71. The optical lens according to any one of claims 37 to 52, characterized in that, The following conditions must be met: 0.01≤BFL / TTL≤0.29, 0.08≤D11*BFL / H≤4.70, 0.02≤arctan(SAG11 / D11))≤1.08, wherein the distance from the second side of the last lens of the optical lens to the imaging plane of the optical lens is BFL, the total optical length of the optical lens is TTL, the image height corresponding to the maximum field of view of the optical lens is H, the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the sagitta of the first side of the sixth lens is SAG11, and the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11.

72. The optical lens according to any one of claims 37 to 52, characterized in that, The following conditions must be met: 0.7≤F45 / F≤2.7, -4.60≤F2 / F3≤-0.21, 0.57≤|R3 / R4|≤3.50, 0.6≤|R5 / R6|≤9.2, 3.1≤TTL / d4≤16.1, 1.8≤TTL / d10≤5.3, 0.7≤R11 / d10≤2.8, -8.8≤F3 / F≤-0.5, 2.5≤TTL / F≤9.6, 0.02≤H / TTL≤0.36, 0.01≤BFL / TTL≤0.19, 0.6≤D11 / H≤ 3.4, 2.3≤TTL / DMAX≤8, 0.5≤d3 / d5≤5.4, 1≤F6 / H≤35, 0.05≤(d8+d9) / TTL≤0.32, 0.3≤|SAG3 / SAG4|≤1.5, 1.2≤|R1 / F|≤88.0, where the focal length of the second lens is F2, the focal length of the third lens is F3, the radius of curvature of the first side of the second lens is R3, the radius of curvature of the second side of the second lens is R4, the radius of curvature of the first side of the third lens is R5, and the radius of curvature of the second side of the third lens is R6 / H≤35. The radius of curvature is R6, the total optical length of the optical lens is TTL, the air gap between the second and third lenses is d4, the air gap between the fifth and sixth lenses is d10, the radius of curvature of the first side surface of the sixth lens is R11, the focal length of the entire optical lens group is F, the fourth and fifth lenses are cemented together to form a cemented lens, the focal length of the cemented lens is F45, the image height corresponding to the maximum field of view of the optical lens is H, and the distance from the second side surface of the last lens of the optical lens to the imaging plane of the optical lens is BFL. The maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the maximum light-transmitting aperture corresponding to the maximum field of view of the optical lens is DMAX, the center thickness of the second lens is d3, the center thickness of the third lens is d5, the focal length of the sixth lens is F6, the center thickness of the fourth lens is d8, the center thickness of the fifth lens is d9, the sagitta of the first side of the second lens is SAG3, the sagitta of the second side of the second lens is SAG4, and the radius of curvature of the first side of the first lens is R1.

73. The optical lens according to any one of claims 37 to 52, characterized in that, The following conditions must be met: -2.6774≤F2 / F3≤-0.4988, 0.9569≤|R3 / R4|≤1.7500, 1.4546≤|R5 / R6|≤7.1304, 4.5515≤TTL / d4≤14.1997, 2.3460≤TTL / d10≤3.2727, 0.9130≤R11 / d10≤1.2727, 3.0226≤F2 / F≤6.5169, -6.5105≤F3 / F≤-1.6818, 0.9731≤F45 / F≤1.7046, 4.0525≤TTL / F≤8.0985, 0.1242≤H / TTL≤0.1613, 0. 0476≤BFL / TTL≤0.0594, 0.9554≤F / H≤1.5295, 2.0187≤D11*BFL / H≤2.6190, 1.0625≤D11 / H≤1.3784, 4.0269≤TTL / DMAX≤5.8029, 0.0487≤arctan(SAG1 1 / D11))≤0.0724,0.8121≤d3 / d5≤2.3062,2.4532≤F6 / H≤29.0382,0.0835≤ (d8+d9) / TTL≤0.1500, 0.5575≤|SAG3 / SAG4|≤0.9676, 2.3588≤|R1 / F|≤84.1886, wherein the focal length of the second lens is F2, the focal length of the third lens is F3, the radius of curvature of the first side surface of the second lens is R3, the radius of curvature of the second side surface of the second lens is R4, the radius of curvature of the first side surface of the third lens is R5, the radius of curvature of the second side surface of the third lens is R6, the total optical length of the optical lens is TTL, the air gap between the second and third lenses is d4, the air gap between the fifth and sixth lenses is d10, the radius of curvature of the first side surface of the sixth lens is R11, the total focal length of the optical lens group is F, the fourth and fifth lenses are cemented together to form a cemented lens, the focal length of the cemented lens is F45, and the maximum field of view of the optical lens corresponds to... The image height is H, the distance from the second side of the last lens of the optical lens to the imaging plane of the optical lens is BFL, the maximum effective aperture of the first side of the sixth lens corresponding to the maximum field of view of the optical lens is D11, the maximum aperture corresponding to the maximum field of view of the optical lens is DMAX, the sagitta of the first side of the sixth lens is SAG11, the center thickness of the second lens is d3, the center thickness of the third lens is d5, the focal length of the sixth lens is F6, the center thickness of the fourth lens is d8, the center thickness of the fifth lens is d9, the sagitta of the first side of the second lens is SAG3, the sagitta of the second side of the second lens is SAG4, and the radius of curvature of the first side of the first lens is R1.

74. An electronic device, characterized in that, It includes an optical lens as described in any one of claims 1 to 73 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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