Optical lens and imaging device

Abstract

The application provides an optical lens and an imaging device. The optical lens comprises, in sequence from an object side to an image side along an optical axis, a first lens, the first lens having positive refractive power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface; a second lens, the second lens having negative refractive power, the object side surface of the second lens being a convex surface, and the image side surface of the second lens being a concave surface; a third lens, the third lens having refractive power, the object side surface of the third lens being a concave surface, and the image side surface of the third lens being a convex surface; a fourth lens, the fourth lens having positive refractive power, at least one of the object side surface and the image side surface of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive refractive power, at least one of the object side surface and the image side surface of the fifth lens being a convex surface; and a sixth lens, the sixth lens having refractive power, the object side surface of the sixth lens being a convex surface, and the image side surface of the sixth lens being a concave surface. The application solves the problem that the optical lens in the prior art cannot simultaneously consider small FNO, small distortion and short TTL.

Description

TECHNICAL FIELD

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

[0002] In recent years, with the rapid development of the automobile auxiliary driving system, optical lenses are applied more and more widely in automobiles, and the requirements of small distortion and small FNO of the optical lenses are also more and more prominent. For some special application optical lenses, in order to increase the light quantity, a small FNO is usually required; in order to improve the image quality, the number of lenses is usually increased, and the increase of the number of lenses will increase the volume and weight of the optical lens, which is not conducive to the miniaturization of the lens and increases the cost. For other special application optical lenses, the imaging quality is affected by harsh environments, and it is difficult to maintain good imaging effect.

[0003] That is, the optical lens in the prior art has the problem that small FNO, small distortion and short TTL are difficult to be considered simultaneously. SUMMARY

[0004] The main purpose of the present application is to provide an optical lens and an imaging device to solve the problem that the optical lens in the prior art has the problem that small FNO, small distortion and short TTL are difficult to be considered simultaneously.

[0005] In order to achieve the above purpose, according to one aspect of the present application, an optical lens is provided, which comprises, in order along the optical axis from the object side to the image side: a first lens, the first lens having positive refractive power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens, the second lens having negative refractive power, the object side surface of the second lens being convex, and the image side surface of the second lens being concave; a third lens, the third lens having refractive power, the object side surface of the third lens being concave, and the image side surface of the third lens being convex; a fourth lens, the fourth lens having positive refractive power, at least one of the object side surface and the image side surface of the fourth lens being convex; a fifth lens, the fifth lens having positive refractive power, at least one of the object side surface and the image side surface of the fifth lens being convex; and a sixth lens, the sixth lens having refractive power, the object side surface of the sixth lens being convex, and the image side surface of the sixth lens being concave.

[0006] Further, the object side surface of the fourth lens is convex.

[0007] Further, the object side surface of the fourth lens is concave.

[0008] Further, the image side surface of the fifth lens is concave.

[0009] Further, the image side surface of the fifth lens is convex.

[0010] Further, the second lens is an aspherical lens.

[0011] Further, the optical lens further comprises a diaphragm, the diaphragm is arranged between the second lens and the third lens.

[0012] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0013] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0014] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0015] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0016] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0017] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0018] Further, a value of a total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to a center of an imaging surface, TTL, and a value of the maximum field of view of the optical lens, FOV, satisfy: TTL / H / tan(FOV)≤6.

[0019] Further, the optical lens satisfies: (FOV*F) / H≤70, where H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, and F is the total focal length of the optical lens.

[0020] Further, the optical lens satisfies: D5 / F≥0.3, where D5 is the maximum clear aperture corresponding to the diaphragm, and F is the total focal length of the optical lens.

[0021] Further, the optical lens satisfies: D13*BFL / H≥11, where BFL is the back focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and D13 is the maximum clear aperture of the image side surface of the sixth lens corresponding to the maximum field of view of the optical lens.

[0022] Further, the optical lens satisfies: 0.5≤Sag4 / Sag3≤2, where Sag3 is the sag of the maximum clear aperture of the object side surface of the second lens corresponding to the maximum field of view of the optical lens, and Sag4 is the sag of the maximum clear aperture of the image side surface of the second lens corresponding to the maximum field of view of the optical lens.

[0023] Further, the optical lens satisfies: R2 / R1≥2.6, where R1 is the radius of the object side surface of the first lens, and R2 is the radius of the image side surface of the first lens.

[0024] Further, the optical lens satisfies: 2≥R6 / R7≥0.35, where R6 is the radius of the object side surface of the third lens, and R7 is the radius of the image side surface of the third lens.

[0025] Further, the optical lens satisfies: 2≥R10 / R11≥-0.1, where R10 is the radius of the object side surface of the fifth lens, and R11 is the radius of the image side surface of the fifth lens.

[0026] Further, the optical lens satisfies: 2.3≥R12 / R13≥0.5, where R12 is the radius of the object side surface of the sixth lens, and R13 is the radius of the image side surface of the sixth lens.

[0027] Further, the optical lens satisfies: 1.1≥|F*tan(FOV / 2) / (H / 2)|≥0.9, where H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, and F is the total focal length of the optical lens.

[0028] Further, the optical lens satisfies: D / H / F≤0.1, where D is the maximum clear aperture of the object side surface of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and F is the total focal length of the optical lens.

[0029] Further, the maximum field of view angle of the optical lens corresponds to an image height H, an arc value θ of the maximum field of view angle of the optical lens, and a maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: D / H / θ≤4.

[0030] Further, the entire focal length value F of the optical lens, the arc value θ of the maximum field of view angle of the optical lens, and the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: F*θ / D≥0.35.

[0031] Further, the focal length value F1 of the first lens of the optical lens and the entire focal length value F of the optical lens satisfy: 2≥F1 / F≥0.5.

[0032] Further, the entire focal length value F of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2.2≤F2 / F≤-0.5.

[0033] Further, the entire focal length value F of the optical lens and the focal length value F3 of the third lens of the optical lens satisfy: |F3 / F|≥2.

[0034] Further, the entire focal length value F of the optical lens and the focal length value F4 of the fourth lens of the optical lens satisfy: 2≥F4 / F≥0.5.

[0035] Further, the entire focal length value F of the optical lens and the focal length value F5 of the fifth lens of the optical lens satisfy: 2.2≥F5 / F≥0.5.

[0036] Further, the entire focal length value F of the optical lens and the focal length value F6 of the sixth lens of the optical lens satisfy: |F6 / F|≥1.2.

[0037] Further, the combined focal length F12 of the first lens and the second lens and the entire focal length value F of the optical lens satisfy: F12 / F≥2.

[0038] Further, the focal length value F1 of the first lens of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2≤F1 / F2≤-0.5.

[0039] Further, the focal length value F1 of the first lens of the optical lens satisfies: F1≥35.

[0040] According to another aspect of the present application, an optical lens is provided, which comprises, in order from the object side to the image side along the optical axis, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having refractive power, a fourth lens having positive refractive power, a fifth lens having positive refractive power, and a sixth lens having refractive power, wherein the maximum field of view angle of the optical lens corresponds to an image height H, the maximum field of view angle FOV of the optical lens, and the total focal length F of the optical lens satisfy the following relationship: (FOVxF) / H≤70.

[0041] Further, the object side surface of the first lens is convex, and the image side surface of the first lens is concave.

[0042] Further, the object side surface of the second lens is convex, and the image side surface of the second lens is concave.

[0043] Further, the object side surface of the third lens is concave, and the image side surface of the third lens is convex.

[0044] Further, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0045] Further, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex.

[0046] Further, the object side surface of the fifth lens is convex, and the image side surface of the fourth lens is convex.

[0047] Further, the object side surface of the fifth lens is convex, and the image side surface of the fourth lens is concave.

[0048] Further, the object side surface of the sixth lens is convex, and the image side surface of the fourth lens is concave.

[0049] Further, the second lens is an aspheric lens.

[0050] Further, the optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens.

[0051] Further, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / EPND≤1.8.

[0052] Further, the total focal length F of the optical lens and the total optical length TTL of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface, satisfy the following relationship: TTL / F≤2.6.

[0053] Further, the optical total length of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface TTL, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy TTL / H / tan(FOV)≤6.

[0054] Further, the optical total length of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface TTL, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy TTL / H / tan(FOV)≤6.

[0055] Further, the optical total length of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface TTL, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy TTL / H / tan(FOV)≤6.

[0056] Further, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy D / H / tan(FOV)≤3.5.

[0057] Further, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum entrance pupil diameter D of the object side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy D / H / tan(FOV)≤3.5.

[0058] Further, the maximum entrance pupil diameter D5 of the diaphragm and the total focal length F of the optical lens satisfy D5 / F≥0.3.

[0059] Further, the optical total length of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface TTL, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy TTL / H / tan(FOV)≤6.

[0060] Further, the maximum entrance pupil diameter D of the object side surface of the second lens corresponding to the maximum field of view of the optical lens, the sagittal height Sag3 at the maximum entrance pupil diameter of the object side surface of the second lens corresponding to the maximum field of view of the optical lens, and the sagittal height Sag4 at the maximum entrance pupil diameter of the image side surface of the second lens corresponding to the maximum field of view of the optical lens satisfy 0.5≤Sag4 / Sag3≤2.

[0061] Further, a relationship between a radius R1 of an object side surface of the first lens and a radius R2 of an image side surface of the first lens satisfies: R2 / R1≥2.6.

[0062] Further, a relationship between a radius R6 of an object side surface of the third lens and a radius R7 of an image side surface of the third lens satisfies: 2≥R6 / R7≥0.35.

[0063] Further, a relationship between a radius R10 of an object side surface of the fifth lens and a radius R11 of an image side surface of the fifth lens satisfies: 2≥R10 / R11≥-0.1.

[0064] Further, a relationship between a radius R12 of an object side surface of the sixth lens and a radius R13 of an image side surface of the sixth lens satisfies: 2.3≥R12 / R13≥0.5.

[0065] Further, a relationship among an image height H corresponding to a maximum field angle of the optical lens, a maximum field angle FOV of the optical lens, and a total focal length value F of the optical lens satisfies: 1.1≥|F*tan(FOV / 2) / (H / 2)|≥0.9.

[0066] Further, a relationship among an image height H corresponding to a maximum field angle of the optical lens, a total focal length value F of the optical lens, and a maximum entrance aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfies: D / H / F≤0.1.

[0067] Further, a relationship among an image height H corresponding to a maximum field angle of the optical lens, an arc value θ of the maximum field angle of the optical lens, and a maximum entrance aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfies: D / H / θ≤4.

[0068] Further, a relationship among a total focal length value F of the optical lens, an arc value θ of the maximum field angle of the optical lens, and a maximum entrance aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfies: F*θ / D≥0.35.

[0069] Further, a relationship between a focal length value F1 of the first lens of the optical lens and a total focal length value F of the optical lens satisfies: 2≥F1 / F≥0.5.

[0070] Further, a relationship between a total focal length value F of the optical lens and a focal length value F2 of the second lens of the optical lens satisfies: -2.2≤F2 / F≤-0.5.

[0071] Further, a relationship between a total focal length value F of the optical lens and a focal length value F3 of the third lens of the optical lens satisfies: |F3 / F|≥2.

[0072] Further, an overall focal length value F of the optical lens and a focal length value F4 of the fourth lens of the optical lens satisfy: 2≥F4 / F≥0.5.

[0073] Further, an overall focal length value F of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: 2.2≥F5 / F≥0.5.

[0074] Further, an overall focal length value F of the optical lens and a focal length value F6 of the sixth lens of the optical lens satisfy: |F6 / F|≥1.2.

[0075] Further, a combined focal length F12 of the first lens and the second lens and an overall focal length value F of the optical lens satisfy: F12 / F≥2.

[0076] Further, a focal length value F1 of the first lens of the optical lens and a focal length value F2 of the second lens of the optical lens satisfy: -2≤F1 / F2≤-0.5.

[0077] Further, a focal length value F1 of the first lens of the optical lens satisfies: F1≥35.

[0078] According to another aspect of the present application, there is provided an imaging device comprising the optical lens described above and an imaging element that converts an optical image formed by the optical lens into an electric signal.

[0079] According to the technical solution of the present application, the optical lens comprises, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the second lens has negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has refractive power, the object side surface of the third lens is concave, and the image side surface of the third lens is convex; the fourth lens has positive refractive power, at least one of the object side surface and the image side surface of the fourth lens is convex; the fifth lens has positive refractive power, at least one of the object side surface and the image side surface of the fifth lens is convex; and the sixth lens has refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave.

[0080] The first lens has positive focal power, which is beneficial to collect more light into the rear optical system and increase the light flux. The object side surface of the first lens is convex, and the object side surface of the first lens is curved larger, which is beneficial to reduce distortion. The second lens has negative focal power, which further collects light and makes the light trend transition smoothly. Meanwhile, since the second lens is an aspheric lens, it is beneficial to improve resolution and compress distortion. By reasonably planning the surface shape and focal power of the third lens, the long-focus characteristic is realized, which is beneficial to smoothly transfer the light collected in the front end to the rear, reduces the system sensitivity. By reasonably planning the surface shape and focal power of the fourth lens, it is beneficial to compress the light collected in the front end and make the light smoothly transfer to the rear, and at the same time, the aperture of the rear lens can be reduced, the system sensitivity is reduced, the image quality is improved, and the system CRA is effectively reduced, which makes it more suitable for use in low-light environments. The fifth lens has positive focal power, which further compresses the light collected in the front end and reduces the aperture of the rear lens, which is beneficial to reduce the system CRA, making it more suitable for use in low-light environments. When the fifth lens is a meniscus lens, it helps to smoothly transfer the light to the rear, which is beneficial to realize small CRA and improve the relative illumination. By reasonably planning the surface shape and focal power of the sixth lens, it is beneficial to smoothly converge the light to the imaging surface, which can effectively reduce the system sensitivity, improve the image quality, and realize small CRA and improve the illumination at the same time.

[0081] In addition, the optical lens of the present application adopts a form of six lenses, which can simultaneously consider the advantages of small distortion and small FNO, increase the light amount, improve the imaging quality, reduce the TTL and cost, and ensure the miniaturization of the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0082] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0083] Figure 1 A structure schematic view of the optical lens of example one of the present application is shown;

[0084] Figure 2 A structure schematic view of the optical lens of example two of the present application is shown;

[0085] Figure 3 A structure schematic view of the optical lens of example three of the present application is shown;

[0086] Figure 4 A structure schematic view of the optical lens of example four of the present application is shown;

[0087] Figure 5 A structure schematic view of the optical lens of example five of the present application is shown;

[0088] Figure 6 A structural schematic diagram of an optical lens of an example six of the present application is shown;

[0089] Figure 7 A structural schematic diagram of an optical lens of an example seven of the present application is shown;

[0090] Figure 8 A structural schematic diagram of an optical lens of an example eight of the present application is shown;

[0091] Figure 9 A structural schematic diagram of an optical lens of an example nine of the present application is shown;

[0092] Figure 10 A structural schematic diagram of an optical lens of an example ten of the present application is shown.

[0093] Among the above figures, the following reference signs are included:

[0094] L1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; L2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; STO, stop; L3, third lens; S6, object side surface of the third lens; S7, image side surface of the third lens; L4, fourth lens; S8, object side surface of the fourth lens; S9, image side surface of the fourth lens; L5, fifth lens; S10, object side surface of the fifth lens; S11, image side surface of the fifth lens; L6, sixth lens; S12, object side surface of the sixth lens; S13, image side surface of the sixth lens; IMA, imaging surface. DETAILED DESCRIPTION

[0095] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0096] It should be noted that, unless otherwise specified, all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs.

[0097] In the present application, unless otherwise specified, the orientation words such as “up, down, top, bottom” are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; likewise, for the convenience of understanding and description, “inner, outer” refers to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0098] It should be noted that in the present specification, the terms first, second, third, etc. are used only to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0099] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0100] In the present specification, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. Each lens surface near the object side becomes the object side surface of the lens, and each lens surface near the image side is referred to as the image side surface of the lens. The judgment of the surface shape in the paraxial region can be made in accordance with the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) positive or negative to judge the convexity or concavity. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0101] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. At this time, the first side of the optical lens can be the object side, and the second side can be the image side. Light rays from the object side can be imaged on the image side. The second side of the optical lens is the imaging surface of the optical lens.

[0102] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light rays from the image source side can be imaged on the imaging side. The second side of the optical lens is the image source surface of the optical lens.

[0103] In order to solve the problem that the optical lens in the prior art cannot simultaneously consider small FNO, small distortion, and short TTL, the present application provides an optical lens and an imaging device.

[0104] Embodiment one

[0105] As Figures 1 to 10As shown, the optical lens comprises, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has positive refractive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the second lens has negative refractive power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the third lens has refractive power, the object side surface of the third lens is concave, and the image side surface of the third lens is convex; the fourth lens has positive refractive power, at least one of the object side surface and the image side surface of the fourth lens is convex; the fifth lens has positive refractive power, at least one of the object side surface and the image side surface of the fifth lens is convex; and the sixth lens has refractive power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave.

[0106] The first lens has positive refractive power, which is conducive to collecting more light into the rear optical system and increasing the light flux. The object side surface of the first lens is convex, and the object side surface of the first lens is curved more, which is conducive to reducing distortion. The second lens has negative refractive power, which further collects light and makes the light trend smooth and transition. At the same time, since the second lens is an aspherical lens, it is conducive to improving resolution and compressing distortion. By reasonably planning the surface shape and refractive power of the third lens, the long-focus characteristic is realized, which is conducive to smoothly transferring the light collected at the front end to the rear, reducing the system sensitivity. By reasonably planning the surface shape and refractive power of the fourth lens, it is conducive to compressing the light collected at the front end and smoothly transferring the light to the rear, while being able to reduce the aperture of the rear lens, reduce the system sensitivity, improve the image quality, and effectively reduce the system CRA, making it more suitable for use in low-light environments. The fifth lens has positive refractive power, which further compresses the light collected at the front end and reduces the aperture of the rear lens, which is conducive to reducing the system CRA, making it more suitable for use in low-light environments. When the fifth lens is a meniscus lens, it helps to smoothly transfer the light to the rear, which is conducive to realizing small CRA and improving relative illumination. By reasonably planning the surface shape and refractive power of the sixth lens, it helps to smoothly converge the light to the imaging surface, which realizes small CRA, improves illumination, effectively reduces system sensitivity, and improves image quality.

[0107] In addition, the optical lens of the present application adopts a form of six lenses, which can simultaneously consider the advantages of small distortion and small FNO, increase the amount of light entering, improve the imaging quality, reduce the TTL, reduce the cost, and ensure the miniaturization of the optical lens.

[0108] In this embodiment, the object side surface of the fourth lens is convex.

[0109] In this embodiment, the object side surface of the fourth lens is concave.

[0110] In this embodiment, the image side surface of the fifth lens is concave.

[0111] In the embodiment, the image side surface of the fifth lens is a convex surface.

[0112] In the embodiment, the second lens is an aspheric lens. This is conducive to correcting the field region and compressing the distortion, thereby achieving high resolution.

[0113] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens. This is conducive to effectively converging the light entering the optical system, and meanwhile, the diaphragm is arranged in front, which is conducive to achieving a small FNO and ensuring the amount of light entering.

[0114] In the embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy F / EPND≤1.8. Satisfying this condition is conducive to achieving an optical lens with a small FNO and increasing the amount of light entering. Preferably, F / EPND≤1.6.

[0115] In the embodiment, the overall focal length F of the optical lens and the overall optical length of the optical lens, i.e., the distance TTL from the center of the object side surface of the first lens to the center of the imaging surface, satisfy TTL / F≤2.6. Satisfying this condition can effectively limit the length of the optical lens and achieve miniaturization. Preferably, TTL / F≤2.2.

[0116] In the embodiment, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the overall optical length of the optical lens, i.e., the distance TTL from the center of the object side surface of the first lens to the center of the imaging surface, satisfy TTL / H / FOV≤0.15. Satisfying this condition can effectively limit the length of the optical lens and be conducive to achieving miniaturization under the condition of the same imaging surface and the same image height. Preferably, TTL / H / FOV≤0.12.

[0117] In the embodiment, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the overall optical length of the optical lens, i.e., the distance TTL from the center of the object side surface of the first lens to the center of the imaging surface, satisfy TTL / H / tan(FOV)≤6. Satisfying this condition can effectively limit the length of the optical lens and be conducive to achieving miniaturization under the condition of the same imaging surface and the same image height. Preferably, TTL / H / tan(FOV)≤5.3.

[0118] In the embodiment, the optical back focal length of the optical lens, i.e., the distance from the image-side center of the last lens of the optical lens to the center of the imaging surface BFL, and the total optical length of the optical lens, i.e., the distance from the object-side center of the first lens to the center of the imaging surface TTL, satisfy the condition BFL / TTL≥0.15. Satisfying the condition, the back focal length is conducive to the assembly of the module on the basis of miniaturization. Preferably, BFL / TTL≥0.18.

[0119] In the embodiment, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition D / H / FOV≤0.07. Satisfying the condition, the front aperture can be small, and miniaturization can be achieved. Preferably, D / H / FOV≤0.06.

[0120] In the embodiment, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum light passing aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy the condition D / H / tan(FOV)≤3.5. Satisfying the condition, the front aperture can be small, and miniaturization can be achieved. Preferably, D / H / tan(FOV)≤3.

[0121] In the embodiment, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the condition (FOV×F) / H≤70. By controlling the condition between the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens within a reasonable range, the optical lens can simultaneously satisfy the short focal length and the small field of view, which is conducive to the realization of small distortion. Preferably, (FOV×F) / H≤65.

[0122] In the embodiment, the light passing aperture D5 corresponding to the diaphragm and the total focal length F of the optical lens satisfy the condition D5 / F≥0.3. Satisfying the condition, a large diaphragm aperture can be achieved, which is conducive to increasing the amount of light. Preferably, D5 / F≥0.35.

[0123] In the embodiment, the optical back focal length of the optical lens, i.e., the distance from the image-side center of the last lens of the optical lens to the center of the imaging surface BFL, the image height H corresponding to the maximum field of view of the optical lens, and the maximum light passing aperture D13 of the image side of the sixth lens corresponding to the maximum field of view of the optical lens satisfy the condition D13*BFL / H≥11. Satisfying the condition, the back focal length can be ensured in the case of the same imaging surface and the same image height, which is conducive to the realization of small CRA. Preferably, D13*BFL / H≥12.

[0124] In the embodiment, the sag Sag3 at the maximum entrance pupil of the object side surface of the second lens corresponding to the maximum field of view of the optical lens and the sag Sag4 at the maximum entrance pupil of the image side surface of the second lens corresponding to the maximum field of view of the optical lens satisfy: 0.5≤Sag4 / Sag3≤2. Satisfying the condition formula makes the sag of the two surfaces of the second lens close, which is beneficial to the smooth transition of light. Preferably, 0.8≤Sag4 / Sag3≤1.8.

[0125] In the embodiment, the radius R1 of the object side surface of the first lens and the radius R2 of the image side surface of the first lens satisfy: R2 / R1≥2.6. Satisfying the condition formula makes the R value of the two surfaces of the first lens differ greatly, which is beneficial to the rapid focusing of the large-angle peripheral light entering through the first lens, thereby improving the imaging quality. Preferably, R2 / R1≥2.8.

[0126] In the embodiment, the radius R6 of the object side surface of the third lens and the radius R7 of the image side surface of the third lens satisfy: 2≥R6 / R7≥0.35. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the third lens close, which is beneficial to the realization of smooth transition of light and the reduction of sensitivity of the system. Preferably, 1.7≥R6 / R7≥0.45.

[0127] In the embodiment, the radius R10 of the object side surface of the fifth lens and the radius R11 of the image side surface of the fifth lens satisfy: 2≥R10 / R11≥-0.1. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the fifth lens close, which is beneficial to the realization of smooth transition of light and the reduction of sensitivity of the system. Preferably, 1.5≥R10 / R11≥-0.18.

[0128] In the embodiment, the radius R12 of the object side surface of the sixth lens and the radius R13 of the image side surface of the sixth lens satisfy: 2.3≥R12 / R13≥0.5. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the sixth lens close, which is beneficial to the realization of smooth transition of light and the reduction of sensitivity of the system. Preferably, 2.2≥R12 / R13≥0.7.

[0129] In the embodiment, the image height H corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens and the total focal length F of the optical lens satisfy: 1.1≥|F*tan(FOV / 2) / (H / 2)|≥0.9. Satisfying the condition formula makes the ideal image height close to the real image height, which is beneficial to the realization of small distortion. Preferably, 1.07≥|F*tan(FOV / 2) / (H / 2)|≥0.93.

[0130] In the embodiment, the maximum field of view of the optical lens corresponds to an image height H, the total focal length of the optical lens is F, and the maximum field of view of the optical lens corresponds to a first lens with a maximum light aperture D on the object side. The following condition is satisfied: D / H / F≤0.1. When the focal length is fixed, the optical lens can have the characteristics of a large target surface and a small aperture. Preferably, D / H / F≤0.07.

[0131] In the embodiment, the maximum field of view of the optical lens corresponds to an image height H, the maximum field of view of the optical lens corresponds to an arc length θ, and the maximum field of view of the optical lens corresponds to a first lens with a maximum light aperture D on the object side. The following condition is satisfied: D / H / θ≤4. When the front end aperture is small, the optical lens can be miniaturized. Preferably, D / H / θ≤3.5.

[0132] In the embodiment, the total focal length of the optical lens is F, the maximum field of view of the optical lens corresponds to an arc length θ, and the maximum field of view of the optical lens corresponds to a first lens with a maximum light aperture D on the object side. The following condition is satisfied: F*θ / D≥0.35. The front end aperture of the optical lens can be small, and the imaging system volume of the optical lens can be reduced. Preferably, F*θ / D≥0.45.

[0133] In the embodiment, the focal length of the first lens of the optical lens is F1, and the total focal length of the optical lens is F. The following condition is satisfied: 2≥F1 / F≥0.5. The first lens has a short focal length, which helps to collect light and ensure light throughput. Preferably, 1.85≥F1 / F≥0.8.

[0134] In the embodiment, the total focal length of the optical lens is F, and the focal length of the second lens of the optical lens is F2. The following condition is satisfied: -2.2≤F2 / F≤-0.5. The second lens has a short focal length, which helps to collect light and ensure light throughput. Preferably, -2≤F2 / F≤-0.8.

[0135] In the embodiment, the total focal length of the optical lens is F, and the focal length of the third lens of the optical lens is F3. The following condition is satisfied: |F3 / F|≥2. The third lens has a long focal length, which helps to transition smoothly and reduce sensitivity. Preferably, |F3 / F|≥2.15.

[0136] In the embodiment, the total focal length of the optical lens is F, and the focal length of the fourth lens of the optical lens is F4. The following condition is satisfied: 2≥F4 / F≥0.5. The fourth lens has a short focal length, which helps to collect light and ensure light throughput. Preferably, 1.85≥F4 / F≥0.8.

[0137] In this embodiment, the focal length F of the entire optical lens group and the focal length F5 of the fifth lens of the optical lens satisfy the condition: 2.2 ≥ F5 / F ≥ 0.5. Satisfying this condition enables a short focal length fifth lens, which helps to collect light and ensure the amount of light transmitted. Preferably, 1.85 ≥ F5 / F ≥ 0.8.

[0138] In this embodiment, the focal length F of the entire optical lens and the focal length F6 of the sixth lens satisfy the condition: |F6 / F|≥1.2. Satisfying this condition ensures that the sixth lens is a telephoto lens, which helps to smooth the light transition and reduce sensitivity. Preferably, |F6 / F|≥1.5.

[0139] In this embodiment, the combined focal length F12 of the first lens and the second lens satisfies the condition F12 / F≥2 with respect to the overall focal length F of the optical lens. Satisfying this condition controls the light path between the first and second lenses, contributing to a smoother light transition and reducing sensitivity. Preferably, F12 / F≥2.5.

[0140] In this embodiment, the focal length F1 of the first lens and the focal length F2 of the second lens satisfy the condition: -2 ≤ F1 / F2 ≤ -0.5. Satisfying this condition ensures that the focal lengths of the first and second lenses are similar, which helps to smooth the light transition and improves image quality. Preferably, -1.5 ≤ F1 / F2 ≤ -0.6.

[0141] In this embodiment, the focal length F1 of the first lens of the optical lens satisfies: F1≥35. Satisfying this condition ensures the telephoto characteristics of the first lens, which helps to smoothly transition the collected light to the rear, reducing system sensitivity. Preferably, F1≥45.

[0142] Example 2

[0143] like Figures 1 to 10 As shown, the optical lens, along the optical axis from the object side to the image side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence. The first lens has positive optical power; the second lens has negative optical power; the third lens has optical power; the fourth lens has positive optical power; the fifth lens has positive optical power; and the sixth lens has optical power. The image height H corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the total focal length F of the optical lens satisfy the following relationship: (FOV×F) / H≤70.

[0144] Preferably, (FOV×F) / H≤65.

[0145] In this embodiment, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave.

[0146] In the embodiment, the object side surface of the second lens is convex, and the image side surface of the second lens is concave.

[0147] In the embodiment, the object side surface of the third lens is concave, and the image side surface of the third lens is convex.

[0148] In the embodiment, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex.

[0149] In the embodiment, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex.

[0150] In the embodiment, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex.

[0151] In the embodiment, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave.

[0152] In the embodiment, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave.

[0153] The first lens has a positive focal power, which is conducive to collecting more light into the rear optical system and increasing the light flux. The object side surface of the first lens is convex, and the object side surface of the first lens is curved, which is conducive to reducing distortion. The second lens has a negative focal power, which further collects light and makes the light trend smooth and transition. At the same time, since the second lens is an aspherical lens, it is conducive to improving resolution and compressing distortion. By reasonably planning the surface shape and focal power of the third lens, the long-focus characteristic is realized, which is conducive to smoothly transferring the light collected at the front end to the rear, reducing the sensitivity of the system. By reasonably planning the surface shape and focal power of the fourth lens, it is conducive to compressing the light collected at the front end and smoothly transferring the light to the rear, while being able to reduce the aperture of the rear lens, reduce the sensitivity of the system, improve the image quality, and effectively reduce the system CRA, making it more suitable for use in low-light environments. By reasonably planning the focal power and surface shape of the fifth lens, the light collected at the front end is further compressed and the aperture of the rear lens is reduced, which is conducive to the smooth transmission of light to the rear, and is conducive to realizing small CRA and improving illumination. By reasonably planning the surface shape and focal power of the sixth lens, it is conducive to the smooth convergence of light to the imaging surface, which realizes small CRA and improves illumination while effectively reducing the sensitivity of the system and improving image quality.

[0154] In addition, by controlling the condition formula among the image height H corresponding to the maximum field angle of the optical lens, the maximum field angle FOV of the optical lens and the total focal length F of the optical lens to be within a reasonable range, the optical lens can meet the short focus and small field angle at the same time, which is beneficial to realize small distortion. The optical lens of the application adopts a six-lens form, which can simultaneously consider the advantages of small distortion and small FNO, increase the light amount, improve the imaging quality, reduce the TTL and cost, and ensure the miniaturization of the optical lens.

[0155] In the embodiment, the second lens is an aspherical lens. This arrangement is beneficial to correct the field area and compress the distortion, thereby realizing high resolution.

[0156] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens. This arrangement is beneficial to effectively converge the light entering the optical system, and simultaneously, the diaphragm is arranged in front, which is beneficial to realize small FNO and ensure the light amount.

[0157] In the embodiment, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy F / EPND≤1.8. Satisfying this condition formula is beneficial to realize the optical lens with small FNO and increase the light amount. Preferably, F / EPND≤1.6.

[0158] In the embodiment, the total focal length F of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, satisfy TTL / F≤2.6. Satisfying this condition formula can effectively limit the length of the optical lens and realize miniaturization. Preferably, TTL / F≤2.2.

[0159] In the embodiment, the image height H corresponding to the maximum field angle of the optical lens, the maximum field angle FOV of the optical lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, satisfy TTL / H / FOV≤0.15. Satisfying this condition formula can effectively limit the length of the optical lens under the condition of the same imaging surface and image height, which is beneficial to realize miniaturization. Preferably, TTL / H / FOV≤0.12.

[0160] In the embodiment, the maximum field of view of the optical lens corresponds to an image height H, the maximum field of view FOV of the optical lens, and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, satisfy TTL / H / tan(FOV)≤6. When the same imaging surface and the same image height are satisfied, the length of the optical lens can be effectively limited, which is beneficial to miniaturization. Preferably, TTL / H / tan(FOV)≤5.3.

[0161] In the embodiment, the back focal length of the optical lens, i.e., the distance BFL from the center of the image side of the last lens of the optical lens to the center of the imaging surface, the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, and the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging surface, satisfy BFL / TTL≥0.15. When the miniaturization is realized, the back focal length is beneficial to the assembly of the module. Preferably, BFL / TTL≥0.18.

[0162] In the embodiment, the maximum field of view of the optical lens corresponds to an image height H, the maximum field of view FOV of the optical lens, and the maximum entrance pupil diameter D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy D / H / FOV≤0.07. When the front end diameter is guaranteed to be small, miniaturization can be realized. Preferably, D / H / FOV≤0.06.

[0163] In the embodiment, the maximum field of view of the optical lens corresponds to an image height H, the maximum field of view FOV of the optical lens, and the maximum entrance pupil diameter D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy D / H / tan(FOV)≤3.5. When the front end diameter is guaranteed to be small, miniaturization can be realized. Preferably, D / H / tan(FOV)≤3.

[0164] In the embodiment, the entrance pupil diameter D5 corresponding to the diaphragm and the total focal length F of the optical lens satisfy D5 / F≥0.3. When the large diaphragm diameter is realized, the light amount can be increased. Preferably, D5 / F≥0.35.

[0165] In the embodiment, the optical back focal length of the optical lens, i.e., the distance from the center of the image side surface of the last lens of the optical lens to the center of the imaging surface BFL, the image height H corresponding to the maximum field angle of the optical lens, and the maximum light aperture D13 of the image side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy D13*BFL / H≥11. Satisfying the condition formula, the back focal length can be ensured in the case of the same imaging surface and the same image height, which is beneficial to realize small CRA. Preferably, D13*BFL / H≥12.

[0166] In the embodiment, the sagittal height Sag3 at the maximum light aperture of the object side surface of the second lens corresponding to the maximum field angle of the optical lens and the sagittal height Sag4 at the maximum light aperture of the image side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy 0.5≤Sag4 / Sag3≤2. Satisfying the condition formula makes the sagittal heights of the two surfaces of the second lens close, which is beneficial to the smooth transition of light. Preferably, 0.8≤Sag4 / Sag3≤1.8.

[0167] In the embodiment, the radius R1 of the object side surface of the first lens and the radius R2 of the image side surface of the first lens satisfy R2 / R1≥2.6. Satisfying the condition formula makes the R values of the two surfaces of the first lens differ greatly, which is beneficial to the rapid focusing of the large-angle peripheral light entering through the first lens, thereby improving the imaging quality. Preferably, R2 / R1≥2.8.

[0168] In the embodiment, the radius R6 of the object side surface of the third lens and the radius R7 of the image side surface of the third lens satisfy 2≥R6 / R7≥0.35. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the third lens close, which is beneficial to realize the smooth transition of light and reduce the sensitivity of the system. Preferably, 1.7≥R6 / R7≥0.45.

[0169] In the embodiment, the radius R10 of the object side surface of the fifth lens and the radius R11 of the image side surface of the fifth lens satisfy 2≥R10 / R11≥-0.1. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the fifth lens close, which is beneficial to realize the smooth transition of light and reduce the sensitivity of the system. Preferably, 1.5≥R10 / R11≥-0.18.

[0170] In the embodiment, the radius R12 of the object side surface of the sixth lens and the radius R13 of the image side surface of the sixth lens satisfy 2.3≥R12 / R13≥0.5. Satisfying the condition formula makes the radii of curvature of the object side surface and the image side surface of the sixth lens close, which is beneficial to realize the smooth transition of light and reduce the sensitivity of the system. Preferably, 2.2≥R12 / R13≥0.7.

[0171] In the embodiment, the image height H corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, and the total focal length F of the optical lens satisfy: 1.1 >= |F*tan(FOV / 2) / (H / 2)| >= 0.9. The condition is satisfied to make the ideal image height close to the real image height, which is beneficial to realize small distortion. Preferably, 1.07 >= |F*tan(FOV / 2) / (H / 2)| >= 0.93.

[0172] In the embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the maximum entrance aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy: D / H / F <= 0.1. The condition is satisfied to provide the optical lens with the characteristics of large target surface and small aperture under the condition of fixed focal length. Preferably, D / H / F <= 0.07.

[0173] In the embodiment, the image height H corresponding to the maximum field of view of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum entrance aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy: D / H / θ <= 4. The condition is satisfied to ensure that the front end aperture is small, and miniaturization can be realized. Preferably, D / H / θ <= 3.5.

[0174] In the embodiment, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum entrance aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens satisfy: F*θ / D >= 0.35. The condition is satisfied to make the front end aperture of the optical lens smaller, and reduce the volume of the imaging system of the optical lens. Preferably, F*θ / D >= 0.45.

[0175] In the embodiment, the focal length F1 of the first lens of the optical lens and the total focal length F of the optical lens satisfy: 2 >= F1 / F >= 0.5. The condition is satisfied to realize the first lens with short focal length, which is helpful for light collection and ensures the light quantity. Preferably, 1.85 >= F1 / F >= 0.8.

[0176] In the embodiment, the total focal length F of the optical lens and the focal length F2 of the second lens of the optical lens satisfy: -2.2 <= F2 / F <= -0.5. The condition is satisfied to realize the second lens with short focal length, which is helpful for light collection and ensures the light quantity. Preferably, -2 <= F2 / F <= -0.8.

[0177] In the embodiment, the total focal length F of the optical lens and the focal length F3 of the third lens of the optical lens satisfy: |F3 / F| >= 2. The condition is satisfied to realize the long focal characteristic of the third lens, which is helpful for light transition and reduces sensitivity. Preferably, |F3 / F| >= 2.15.

[0178] In the embodiment, the whole focal length value F of the optical lens and the focal length value F4 of the fourth lens of the optical lens satisfy: 2≥F4 / F≥0.5. Satisfying the condition, the fourth lens with short focal length helps to collect light and ensure the light quantity. Preferably, 1.85≥F4 / F≥0.8.

[0179] In the embodiment, the whole focal length value F of the optical lens and the focal length value F5 of the fifth lens of the optical lens satisfy: 2.2≥F5 / F≥0.5. Satisfying the condition, the fifth lens with short focal length helps to collect light and ensure the light quantity. Preferably, 1.85≥F5 / F≥0.8.

[0180] In the embodiment, the whole focal length value F of the optical lens and the focal length value F6 of the sixth lens of the optical lens satisfy: |F6 / F|≥1.2. Satisfying the condition, the sixth lens with long focal length helps to gently transition light and reduce sensitivity. Preferably, |F6 / F|≥1.5.

[0181] In the embodiment, the combined focal length F12 of the first lens and the second lens and the whole focal length value F of the optical lens satisfy: F12 / F≥2. Satisfying the condition, the light path between the first lens and the second lens is controlled, which helps to gently transition light and reduce sensitivity. Preferably, F12 / F≥2.5.

[0182] In the embodiment, the focal length value F1 of the first lens of the optical lens and the focal length value F2 of the second lens of the optical lens satisfy: -2≤F1 / F2≤-0.5. Satisfying the condition, the focal length of the first lens and the second lens is close, which helps to gently transition light and improve image quality. Preferably, -1.5≤F1 / F2≤-0.6.

[0183] In the embodiment, the focal length value F1 of the first lens of the optical lens satisfies: F1≥35. Satisfying the condition, the long focal length characteristic of the first lens is ensured, which helps to gently transition the collected light to the rear and reduce system sensitivity. Preferably, F1≥45.

[0184] Optionally, the above optical lens can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0185] The optical lens in this application may employ multiple lens elements, such as the six elements described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0186] In an exemplary embodiment, the first, second, third, fourth, fifth, and sixth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass 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.

[0187] 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.

[0188] 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.

[0189] It should be noted that any of the examples one through ten below are applicable to all embodiments of this application.

[0190] Example 1

[0191] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0192] like Figure 1As shown, the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and an imaging surface IMA.

[0193] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is concave, and the image side surface S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is convex, and the image side surface S11 of the fifth lens is concave. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is convex, and the image side surface S13 of the sixth lens is concave. Light from the object passes through each surface S1 to S13 in order and is finally imaged on the imaging surface IMA.

[0194] In this example, the total effective focal length F of the optical lens is 32.424 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 60.151 mm.

[0195] Table 1 shows the basic structure parameter table of the optical lens of Example 1, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0196] Surf Radius Thickness Nd Vd 1 32.475 4.782 1.77 49.60 2 113.403 5.534 3 19.137 3.133 1.59 61.16 4 11.172 4.655 5 Infinity 4.880 6 -18.542 4.844 1.81 40.95 7 -24.964 0.100 8 150.190 5.648 1.61 63.40 9 -27.561 0.100 10 36.678 4.733 1.77 49.60 11 200.000 0.100 12 21.023 6.340 1.61 63.40 13 13.774 15.302 IMA Infinity

[0197] Table 1

[0198] In Example 1, the object side surface and the image side surface of any one of the first lens L1 to the sixth lens L6 are aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0199]

[0200] wherein x is the distance sag from the vertex of the aspherical surface when the aspherical surface is at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, and E are high-order coefficients. Table 2 below shows the conic coefficient k and the high-order coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example 1.

[0201] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -4.1478 -4.2731E-05 -2.4104E-07 2.4740E-09 -1.0022E-11 1.7667E-14 4 -1.9545 -2.1800E-05 -1.4903E-07 2.3911E-09 -1.1459E-11 5.7330E-14

[0202] Table 2

[0203] Example 2

[0204] like Figure 2 The image shows an optical lens of Example 2 of this application. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples. Figure 2 A schematic diagram of the optical lens structure of Example 2 is shown.

[0205] The first lens L1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has negative optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens L3 has negative optical power, its object-side surface S6 is concave, and its image-side surface S7 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is convex, and its image-side surface S9 is convex. The fifth lens L5 has positive optical power, its object-side surface S10 is convex, and its image-side surface S11 is concave. The sixth lens L6 has negative optical power, its object-side surface S12 is convex, and its image-side surface S13 is concave. Light from the object passes sequentially through surfaces S1 to S13 and is finally imaged onto the imaging plane IMA.

[0206] In this example, the total effective focal length F of the optical lens is 32.465mm, the maximum field of view (FOV) of the optical lens is 34°, and the total length (TTL) of the optical lens is 61.767mm.

[0207] Table 3 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius), thickness (Thickness / Distance), refractive index (Nd), and Abbe number (Vd) are all millimeters (mm).

[0208] Surf Radius Thickness Nd Vd 1 34.222 5.237 1.77 49.60 2 145.720 5.867 3 18.251 3.132 1.59 61.16 4 10.842 5.248 5 Infinity 5.561 6 -17.506 5.110 1.81 40.95 7 -22.994 0.100 8 145.330 5.653 1.61 63.40 9 -28.901 0.100 10 35.973 5.195 1.77 49.60 11 200.000 0.100 12 20.455 5.764 1.61 63.40 13 13.637 14.701 IMA Infinity

[0209] Table 3

[0210] Table 4 below gives the conic coefficient k and the coefficients A, B, C, D and E of each higher-order term that can be used for the aspherical lens surfaces S3 and S4 in Example 2.

[0211] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -3.7817 -3.9972E-05 -2.2923E-07 2.5280E-09 -1.0772E-11 1.7679E-14 4 -2.0868 -1.3233E-05 -1.0969E-07 1.9894E-09 -1.5812E-11 1.2078E-13

[0212] Table 4

[0213] Example 3

[0214] like Figure 3 As shown, an optical lens of Example 3 of this application is described. Figure 3A schematic diagram of the optical lens structure of Example Three is shown.

[0215] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is concave, and the image side surface S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is convex, and the image side surface S11 of the fifth lens is convex. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is convex, and the image side surface S13 of the sixth lens is concave. Light from the object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0216] In the present example, the total effective focal length F of the optical lens is 32.688 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 57.202 mm.

[0217] Table 5 shows the basic structural parameter table of the optical lens of Example Three, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0218] Surf Radius Thickness Nd Vd 1 27.228 4.950 1.77 49.60 2 79.215 4.725 3 16.079 4.197 1.59 61.16 4 9.475 3.323 5 Infinity 3.897 6 -19.277 5.069 1.81 40.95 7 -32.716 0.100 8 142.171 5.033 1.61 63.40 9 -28.639 0.100 10 32.808 5.302 1.77 49.60 11 -160.533 0.100 12 23.701 5.015 1.61 63.40 13 14.383 15.390 IMA Infinity

[0219] Table 5

[0220] The following Table 6 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Three.

[0221] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.6702 -2.0838E-05 -4.0324E-07 2.7119E-09 -8.1908E-12 -1.3608E-15 4 -1.1318 1.8362E-05 -3.0615E-07 1.1557E-09 6.4002E-12 -9.9625E-14

[0222] Table 6

[0223] Example Four

[0224] As Figure 4 shown, the optical lens of Example Four of the present application is described. Figure 4 A schematic diagram of the optical lens structure of Example Four is shown.

[0225] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is a concave surface, and the image side surface S7 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is a convex surface, and the image side surface S11 of the fifth lens is a convex surface. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is a convex surface, and the image side surface S13 of the sixth lens is a concave surface. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0226] In this example, the total effective focal length F of the optical lens is 32.745 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 56.649 mm.

[0227] Table 7 shows the basic structural parameter table of the optical lens of Example Four, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0228] Surf Radius Thickness Nd Vd 1 27.266 4.963 1.77 49.60 2 79.630 4.737 3 16.008 4.207 1.59 61.16 4 9.443 3.177 5 Infinity 4.643 6 -19.277 5.193 1.81 40.95 7 -32.878 0.100 8 139.818 4.945 1.61 63.40 9 -28.334 0.100 10 33.081 5.126 1.77 49.60 11 -174.344 0.100 12 23.387 5.031 1.61 63.40 13 14.406 14.329 IMA Infinity

[0229] Table 7

[0230] The following Table 8 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Four.

[0231] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.4158 -1.9562E-05 -3.9565E-07 2.7210E-09 -8.4733E-12 -8.5454E-16 4 -1.2564 1.5110E-05 -3.3673E-07 1.2034E-09 1.1733E-11 -4.3567E-14

[0232] Table 8

[0233] Example Five

[0234] As Figure 5 shown, the optical lens of Example Five of the present application is described. Figure 5 A schematic diagram of the optical lens structure of Example Five is shown.

[0235] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is a concave surface, and the image side surface S7 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is a convex surface, and the image side surface S11 of the fifth lens is a convex surface. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is a convex surface, and the image side surface S13 of the sixth lens is a concave surface. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0236] In this example, the total effective focal length F of the optical lens is 32.428 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 55.632 mm.

[0237] Table 9 shows the basic structural parameter table of the optical lens of Example Five, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0238] Surf Radius Thickness Nd Vd 1 32.610 4.448 1.77 49.60 2 172.468 3.519 3 14.984 4.237 1.59 61.16 4 9.231 3.562 5 Infinity 4.846 6 -23.482 5.005 1.81 40.95 7 -38.301 0.100 8 -164.313 4.821 1.61 63.40 9 -25.190 0.100 10 31.368 5.384 1.77 49.60 11 -164.826 0.100 12 24.015 5.159 1.61 63.40 13 14.508 14.351 IMA Infinity

[0239] Table 9

[0240] The following Table 10 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Five.

[0241] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.4262 -1.9521E-05 -5.4189E-07 2.9008E-09 -4.1535E-12 -2.8925E-14 4 -1.3273 1.6327E-05 -6.3206E-07 -5.1863E-10 5.8096E-11 -4.2082E-13

[0242] Table 10

[0243] Example Six

[0244] As Figure 6 shown, the optical lens of Example Six of the present application is described. Figure 6 A schematic diagram showing the structure of the optical lens of Example Six is shown.

[0245] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is a concave surface, and the image side surface S7 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is a convex surface, and the image side surface S11 of the fifth lens is a convex surface. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is a convex surface, and the image side surface S13 of the sixth lens is a concave surface. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0246] In this example, the total effective focal length F of the optical lens is 32.455 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 55.787 mm.

[0247] Table 11 shows the basic structural parameter table of the optical lens of Example Six, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0248] Surf Radius Thickness Nd Vd 1 32.518 4.621 1.77 49.6 2 174.376 3.641 3 14.971 4.291 1.59 61.16 4 9.237 3.477 5 Infinity 5.003 6 -23.798 4.999 1.81 40.95 7 -38.643 0.100 8 -173.081 5.046 1.61 63.4 9 -25.316 0.100 10 31.235 5.349 1.77 49.6 11 -176.118 0.100 12 23.992 5.190 1.61 63.4 13 14.463 13.872 IMA Infinity

[0249] Table 11

[0250] The following Table 12 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Six.

[0251] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.3343 -1.9756E-05 -5.4086E-07 3.0223E-09 -3.3080E-12 -4.1818E-14 4 -1.3752 2.2935E-05 -5.5404E-07 -1.7152E-10 5.4130E-11 -5.2806E-13

[0252] Table 12

[0253] Example Seven

[0254] As Figure 7 shown, the optical lens of Example Seven of the present application is described. Figure 7 A schematic diagram showing the structure of the optical lens of Example Seven is shown.

[0255] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is a concave surface, and the image side surface S7 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is a convex surface, and the image side surface S11 of the fifth lens is a concave surface. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is a convex surface, and the image side surface S13 of the sixth lens is a concave surface. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0256] In this example, the total effective focal length F of the optical lens is 32.526 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 53.955 mm.

[0257] Table 13 shows the basic structure parameter table of the optical lens of Example Seven, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0258] Surf Radius Thickness Nd Vd 1 31.623 4.281 1.77 49.60 2 150.214 2.658 3 15.484 4.064 1.59 61.16 4 9.645 3.493 5 Infinity 5.825 6 -25.208 5.162 1.81 40.95 7 -39.857 0.100 8 -161.550 4.830 1.61 63.40 9 -23.266 0.100 10 28.238 4.699 1.77 49.60 11 180.464 0.100 12 24.127 5.530 1.61 63.40 13 14.909 13.113 IMA Infinity

[0259] Table 13

[0260] The following Table 14 gives the conic constant k and the high-order coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Seven.

[0261] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.1895 -1.9552E-05 -6.0162E-07 3.1248E-09 4.0720E-13 -4.8482E-14 4 -1.5418 1.4117E-05 -6.6199E-07 -8.6693E-10 6.2925E-11 -2.7972E-13

[0262] Table 14

[0263] Example Eight

[0264] As Figure 8 shown, the optical lens of Example Eight of the present application is described. Figure 8 A schematic diagram showing the structure of the optical lens of Example Eight is shown.

[0265] The first lens L1 has positive refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens L2 has negative refractive power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens L3 has negative refractive power, the object side S6 of the third lens is concave, and the image side S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side S8 of the fourth lens is concave, and the image side S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the object side S10 of the fifth lens is convex, and the image side S11 of the fifth lens is concave. The sixth lens L6 has negative refractive power, the object side S12 of the sixth lens is convex, and the image side S13 of the sixth lens is concave. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the imaging plane IMA.

[0266] In this example, the total effective focal length F of the optical lens is 32.539 mm, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 54.729 mm.

[0267] Table 15 shows the basic structure parameter table of the optical lens of Example Eight, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0268] Surf Radius Thickness Nd Vd 1 31.624 4.285 1.77 49.60 2 150.192 2.660 3 15.488 4.065 1.59 61.16 4 9.641 3.543 5 Infinity 5.787 6 -25.211 5.145 1.81 40.95 7 -39.859 0.100 8 -161.607 4.997 1.61 63.40 9 -23.266 0.100 10 28.231 4.710 1.77 49.60 11 180.881 0.100 12 24.139 5.531 1.61 63.40 13 14.901 13.707 IMA Infinity

[0269] Table 15

[0270] The following Table 16 gives the conic constant k and the high-order coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Eight.

[0271] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -1.2861 -1.9462E-05 -6.0106E-07 3.1382E-09 5.4157E-13 -4.7864E-14 4 -1.4411 1.4201E-05 -6.6057E-07 -8.3527E-10 6.3777E-11 -2.6226E-13

[0272] Table 16

[0273] Example Nine

[0274] As Figure 9 shown, the optical lens of Example Nine of the present application is described. Figure 9 A schematic diagram showing the structure of the optical lens of Example Nine is shown.

[0275] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The third lens L3 has positive refractive power, the object side surface S6 of the third lens is a concave surface, and the image side surface S7 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is a convex surface, and the image side surface S11 of the fifth lens is a concave surface. The sixth lens L6 has negative refractive power, the object side surface S12 of the sixth lens is a convex surface, and the image side surface S13 of the sixth lens is a concave surface. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the imaging plane IMA.

[0276] In this example, the total effective focal length F of the optical lens is 34.272, the maximum field of view FOV of the optical lens is 34°, and the total length TTL of the optical lens is 60.665 mm.

[0277] Table 17 shows the basic structural parameter table of the optical lens of Example Nine, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0278] Surf Radius Thickness Nd Vd 1 32.475 4.921 1.77 49.60 2 110.703 3.283 3 16.684 3.571 1.59 61.16 4 10.801 3.478 5 Infinity 9.508 6 -24.329 5.010 1.81 40.95 7 -24.329 0.100 8 90.234 4.865 1.61 63.40 9 -53.440 1.562 10 31.425 4.841 1.77 49.60 11 190.108 1.028 12 31.850 5.498 1.61 63.40 13 15.091 13.000 IMA Infinity

[0279] Table 17

[0280] The following Table 18 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Nine.

[0281] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -2.3043 -2.4678E-05 -2.1876E-07 1.5209E-09 -1.1904E-11 4.4232E-14 4 -1.5174 -2.1502E-06 -2.5586E-07 1.5718E-09 -8.1001E-12 -2.2297E-14

[0282] Table 18

[0283] Example Ten

[0284] As Figure 10 shown, the optical lens of Example Ten of the present application is described. Figure 10 A schematic diagram showing the structure of the optical lens of Example Ten is shown.

[0285] The first lens L1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has negative refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens L3 has negative refractive power, the object side surface S6 of the third lens is concave, and the image side surface S7 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has positive refractive power, the object side surface S10 of the fifth lens is convex, and the image side surface S11 of the fifth lens is concave. The sixth lens L6 has positive refractive power, the object side surface S12 of the sixth lens is convex, and the image side surface S13 of the sixth lens is concave. Light from an object sequentially passes through the surfaces S1 to S13 and is finally imaged on the image plane IMA.

[0286] In the present example, the total effective focal length F of the optical lens is 33.472, the maximum field of view FOV of the optical lens is 34°, and the total track length TTL of the optical lens is 61.530 mm.

[0287] Table 19 shows the basic structure parameter table of the optical lens of example ten, wherein the units of the radius of curvature Radius, the thickness Thickness / distance, the refractive index Nd, and the Abbe number Vd are all millimeters (mm).

[0288] Surf Radius Thickness Nd Vd 1 33.547 6.229 1.77 49.60 2 148.907 6.503 3 18.300 3.697 1.59 61.16 4 10.903 3.841 5 Infinity 6.256 6 -17.545 4.238 1.81 40.95 7 -24.255 0.100 8 156.916 4.752 1.61 63.40 9 -31.306 1.010 10 46.377 4.716 1.77 49.60 11 342.080 0.222 12 16.899 5.242 1.61 63.40 13 15.764 14.725 IMA Infinity

[0289] Table 19

[0290] The following table 20 gives the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in example ten.

[0291] Order of the high degree term / 4 6 8 10 12 Surf K A B C D E 3 -3.6604 -4.0867E-05 -2.6434E-07 2.3253E-09 -1.3207E-11 -1.6220E-14 4 -2.0968 -1.3361E-05 -1.3532E-07 8.9433E-10 -3.8496E-11 -2.9445E-13

[0292] Table 20

[0293] In summary, examples one to ten all satisfy the relationships shown in table 21.

[0294]

[0295]

[0296] Table 21

[0297] Table 22 gives the effective focal length F of the optical lens of examples one to ten, the effective focal lengths F1 to F6 of each lens, and the like (unit: millimeters).

[0298]

[0299]

[0300] Table 22

[0301] This application also provides an imaging device, including the aforementioned optical lens and an imaging element that converts the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0302] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0303] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0304] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0305] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens characterized in that, The optical lens has six lenses with optical power, and sequentially comprises, along the optical axis from the object side to the image side: a first lens having positive optical power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens having negative optical power, the object side surface of the second lens being convex, and the image side surface of the second lens being concave; a third lens having optical power, the object side surface of the third lens being concave, and the image side surface of the third lens being convex; a fourth lens having positive optical power, the image side surface of the fourth lens being convex; a fifth lens having positive optical power, the object side surface of the fifth lens being convex; a sixth lens having optical power, the object side surface of the sixth lens being convex, and the image side surface of the sixth lens being concave; wherein the third lens and the sixth lens both have negative optical power, or the third lens has positive optical power and the sixth lens has negative optical power, or the third lens has negative optical power and the sixth lens has positive optical power; a sag height Sag3 at a maximum light entrance aperture of the object side surface of the second lens corresponding to a maximum field of view angle of the optical lens and a sag height Sag4 at a maximum light entrance aperture of the image side surface of the second lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤Sag4 / Sag3≤2; a total focal length value F of the optical lens and a total optical length TTL of the optical lens, i.e., a distance from the center of the object side surface of the first lens to the center of the imaging surface, satisfy: 1.659≤TTL / F≤2.6; the total focal length value F of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: 2.2≥F5 / F≥0.5; the total focal length value F of the optical lens and a focal length value F6 of the sixth lens of the optical lens satisfy: 15.443≥|F6 / F|≥2.

310.

2. The optical lens of claim 1, wherein, the object side surface of the fourth lens is convex.

3. The optical lens of claim 1, wherein, the object side surface of the fourth lens is concave.

4. The optical lens of claim 1, wherein, the image side surface of the fifth lens is concave.

5. The optical lens of claim 1, wherein, the image side surface of the fifth lens is convex.

6. The optical lens of claim 1, wherein, the second lens is an aspherical lens.

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

8. The optical lens of any of claims 1 to 7, wherein, the total focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / EPND≤1.

8.

9. The optical lens of any of claims 1 to 7, wherein, the total focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / EPND≤1.

8.

10. The optical lens of any of claims 1 to 7, wherein, the total focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: F / EPND≤1.

8. the image height H corresponding to the maximum field of view angle of the optical lens, the maximum field of view angle FOV of the optical lens, and the total optical length TTL of the optical lens, i.e., the distance from the center of the object side surface of the first lens to the center of the imaging surface, satisfy: TTL / H / tan(FOV)≤6.

11. The optical lens of any of claims 1 to 7, wherein, An optical back focal length of the optical lens, i.e., a distance from a center of an image side surface of a last lens of the optical lens to a center of an image plane BFL, and an optical total track length of the optical lens, i.e., a distance from a center of an object side surface of the first lens to the center of the image plane TTL satisfy: 0.269≥BFL / TTL≥0.

15.

12. The optical lens of any of claims 1 to 7, wherein, A maximum field of view angle of the optical lens corresponds to an image height H, a maximum field of view angle FOV of the optical lens, and a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: D / H / FOV≤0.

07.

13. The optical lens of any of claims 1 to 7, wherein, A maximum field of view angle of the optical lens corresponds to an image height H, a maximum field of view angle FOV of the optical lens, and a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: D / H / tan(FOV)≤3.

5.

14. The optical lens of any of claims 1 to 7, wherein, A light passing aperture D5 corresponding to a diaphragm and a total focal length value F of the optical lens satisfy: 0.509≥D5 / F≥0.

3.

15. The optical lens of any of claims 1 to 7, wherein, An optical back focal length of the optical lens, i.e., a distance from a center of an image side surface of a last lens of the optical lens to a center of an image plane BFL, an image height H corresponding to a maximum field of view angle of the optical lens, and a maximum light passing aperture D13 of an image side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens satisfy: 16.015≥D13*BFL / H≥11.

16. The optical lens of any of claims 1 to 7, wherein, A maximum field of view angle of the optical lens corresponds to a sag height Sag3 at a maximum light passing aperture of an object side surface of the second lens and a sag height Sag4 at a maximum light passing aperture of an image side surface of the second lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.8≤Sag4 / Sag3≤2.

17. The optical lens of any of claims 1 to 7, wherein, A radius R1 of an object side surface of the first lens and a radius R2 of an image side surface of the first lens satisfy: 5.363≥R2 / R1≥2.

6.

18. The optical lens of any of claims 1 to 7, wherein, A radius R6 of an object side surface of the third lens and a radius R7 of an image side surface of the third lens satisfy: 2≥R6 / R7≥0.

35.

19. The optical lens of any of claims 1 to 7, wherein, A radius R10 of an object side surface of the fifth lens and a radius R11 of an image side surface of the fifth lens satisfy: 2≥R10 / R11≥-0.

1.

20. The optical lens of any of claims 1 to 7, wherein, A radius R12 of an object side surface of the sixth lens and a radius R13 of an image side surface of the sixth lens satisfy: 2.3≥R12 / R13≥0.

5.

21. The optical lens of any of claims 1 to 7, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, a maximum field of view angle FOV of the optical lens, and a total focal length value F of the optical lens satisfy: 1.1≥|F*tan(FOV / 2) / (H / 2)|≥0.

9.

22. The optical lens of any of claims 1 to 7, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, a total focal length value F of the optical lens, and a maximum light passing aperture D of an object side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: D / H / F≤0.

1.

23. The optical lens of any of claims 1 to 7, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, an arc value θ of the maximum field of view angle of the optical lens, and a maximum light passing aperture of an object side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: D / H / θ≤4.

24. The optical lens of any of claims 1 to 7, wherein, An optical lens has a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens.

25. The optical lens of any of claims 1 to 7, wherein, The first lens has a positive refractive power, and the object side surface of the first lens is a convex surface.

26. The optical lens of any of claims 1 to 7, wherein, The second lens has a negative refractive power, and the object side surface of the second lens is a convex surface.

27. The optical lens of any of claims 1 to 7, wherein, The third lens has a refractive power, and the object side surface of the third lens is a concave surface.

28. The optical lens of any of claims 1 to 7, wherein, The fourth lens has a positive refractive power, and the image side surface of the fourth lens is a convex surface.

29. The optical lens of any of claims 1 to 7, wherein, The fifth lens has a positive refractive power, and the object side surface of the fifth lens is a convex surface.

30. The optical lens of any of claims 1 to 7, wherein, The sixth lens has a refractive power, and the object side surface of the sixth lens is a convex surface.

31. The optical lens of any of claims 1 to 7, wherein, The third lens and the sixth lens have a negative refractive power, or the third lens has a positive refractive power and the sixth lens has a negative refractive power, or the third lens has a negative refractive power and the sixth lens has a positive refractive power.

32. The optical lens of any of claims 1 to 7, wherein, The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F.

33. An optical lens, characterized in that, The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. 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The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. 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The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The first lens and the second lens have a combined focal length F12, and the optical lens has a total focal length F. The A sag height Sag3 at a maximum light aperture of an object side surface of the second lens corresponding to a maximum field of view angle of the optical lens and a sag height Sag4 at a maximum light aperture of an image side surface of the second lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤Sag4 / Sag3≤2; An image height H corresponding to a maximum field of view angle of the optical lens, a maximum field of view angle FOV of the optical lens, and a total focal length value F of the optical lens satisfy: 56.133≤(FOVxF) / H≤70; A total focal length value F of the optical lens and a total optical length of the optical lens, that is, a center distance TTL from an object side surface center of the first lens to a center of an imaging surface satisfy: 1.659≤TTL / F≤2.6; The total focal length value F of the optical lens and a focal length value F5 of the fifth lens of the optical lens satisfy: 2.2≥F5 / F≥0.5; The total focal length value F of the optical lens and a focal length value F6 of the sixth lens of the optical lens satisfy: 15.443≥|F6 / F|≥2.

310.

34. The optical lens of claim 33, wherein, The object side surface of the fourth lens is a convex surface.

35. The optical lens of claim 33, wherein, The object side surface of the fourth lens is a concave surface.

36. The optical lens of claim 33, wherein, The image side surface of the fifth lens is a convex surface.

37. The optical lens of claim 33, wherein, The image side surface of the fifth lens is a concave surface.

38. The optical lens of claim 33, wherein, The second lens is an aspherical lens.

39. The optical lens of claim 33, wherein, The optical lens further comprises a diaphragm, which is arranged between the second lens and the third lens.

40. The optical lens of any of claims 33-39, wherein, The total focal length value F of the optical lens and an entrance pupil diameter ENPD of the optical lens satisfy: 1.5≤F / EPND≤1.

6.

41. The optical lens of any of claims 33-39, wherein, The total focal length value F of the optical lens and a total optical length of the optical lens, that is, a center distance TTL from an object side surface center of the first lens to a center of an imaging surface satisfy: 1.659≤TTL / F≤2.

2.

42. The optical lens of any of claims 33-39, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, a maximum field of view angle FOV of the optical lens, and a total optical length of the optical lens, that is, a center distance TTL from an object side surface center of the first lens to a center of an imaging surface satisfy: 0.085≤TTL / H / FOV≤0.

12.

43. The optical lens of any of claims 33-39, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, a maximum field of view angle FOV of the optical lens, and a total optical length of the optical lens, that is, a center distance TTL from an object side surface center of the first lens to a center of an imaging surface satisfy: 4.283≤TTL / H / tan(FOV)≤5.

3.

44. The optical lens of any of claims 33-39, wherein, An optical back focus of the optical lens, that is, a center distance BFL from an image side center of a last lens of the optical lens to a center of an imaging surface and a total optical length of the optical lens, that is, a center distance TTL from an object side surface center of the first lens to a center of an imaging surface satisfy: 0.18≤BFL / TTL≤0.

269.

45. The optical lens of any of claims 33-39, wherein, An image height H corresponding to a maximum field of view angle of the optical lens, a maximum field of view angle FOV of the optical lens, and a maximum light aperture D of an object side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: 0.043≤D / H / FOV≤0.

06.

46. The optical lens of any of claims 33-39, wherein, A maximum field angle of the optical lens corresponds to an image height H, a maximum field angle FOV of the optical lens, and a maximum aperture diameter D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 2.15≤D / H / tan(FOV)≤3.

47. The optical lens of any of claims 33-39, wherein, An aperture diameter D5 corresponding to the diaphragm and a total focal length F of the optical lens satisfy: 0.35≤D5 / F≤0.

509.

48. The optical lens of any of claims 33-39, wherein, An optical back focal length of the optical lens, that is, a distance BFL from the center of the image side surface of the last lens of the optical lens to the center of the imaging surface, an image height H corresponding to the maximum field angle of the optical lens, and a maximum aperture diameter D13 of the image side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy: 12≤D13*BFL / H≤16.

015.

49. The optical lens of any of claims 33-39, wherein, A sagittal height Sag3 at the maximum aperture diameter of the object side surface of the second lens corresponding to the maximum field angle of the optical lens and a sagittal height Sag4 at the maximum aperture diameter of the image side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy: 0.8≤sag4 / sag3≤1.

8.

50. The optical lens of any of claims 33-39, wherein, A radius R1 of the object side surface of the first lens and a radius R2 of the image side surface of the first lens satisfy: 2.8≤R2 / R1≤5.

363.

51. The optical lens of any of claims 33-39, wherein, A radius R6 of the object side surface of the third lens and a radius R7 of the image side surface of the third lens satisfy: 1.7≥R6 / R7≥0.

45.

52. The optical lens of any of claims 33-39, wherein, A radius R10 of the object side surface of the fifth lens and a radius R11 of the image side surface of the fifth lens satisfy: 1.5≥R10 / R11≥-0.

18.

53. The optical lens of any of claims 33-39, wherein, A radius R12 of the object side surface of the sixth lens and a radius R13 of the image side surface of the sixth lens satisfy: 2.2≥R12 / R13≥0.

7.

54. The optical lens of any of claims 33-39, wherein, An image height H corresponding to the maximum field angle of the optical lens, a maximum field angle FOV of the optical lens, and a total focal length F of the optical lens satisfy: 1.07≥|F*tan(FOV / 2) / (H / 2)|≥0.

93.

55. The optical lens of any of claims 33-39, wherein, An image height H corresponding to the maximum field angle of the optical lens, a total focal length F of the optical lens, and a maximum aperture diameter D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 0.042≤D / H / F≤0.

07.

56. The optical lens of any of claims 33-39, wherein, An image height H corresponding to the maximum field angle of the optical lens, an arc value θ of the maximum field angle of the optical lens, and a maximum aperture diameter of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 2.444≤D / H / θ≤3.

5.

57. The optical lens of any of claims 33-39, wherein, A total focal length F of the optical lens, an arc value θ of the maximum field angle of the optical lens, and a maximum aperture diameter D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: 0.45≤F*θ / D≤0.

69.

58. The optical lens of any of claims 33-39, wherein, A focal length F1 of the first lens of the optical lens and a total focal length F of the optical lens satisfy: 1.85≥F1 / F≥0.

8.

59. The optical lens of any of claims 33-39, wherein, The following relationship is met between the overall focal length F of the optical lens and the focal length F2 of the second lens of the optical lens: -2≤F2 / F≤-0.

8.

60. The optical lens of any of claims 33-39, wherein, The following relationship is met between the overall focal length F of the optical lens and the focal length F3 of the third lens of the optical lens: 2.15≤|F3 / F|≤4.

865.

61. The optical lens of any of claims 33-39, wherein, The following relationship is met between the overall focal length F of the optical lens and the focal length F4 of the fourth lens of the optical lens: 1.85≥F4 / F≥0.

8.

62. The optical lens of any of claims 33-39, wherein, The following relationship is met between the overall focal length F of the optical lens and the focal length F5 of the fifth lens of the optical lens: 1.85≥F5 / F≥0.

8.

63. The optical lens of any of claims 33-39, wherein, The following relationship is met between the overall focal length F of the optical lens and the focal length F6 of the sixth lens of the optical lens: 1.5≤|F6 / F|≤3.

046.

64. The optical lens of any of claims 33-39, wherein, The following relationship is met between the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens: 2.5≤F12 / F≤9.

434.

65. The optical lens of any of claims 33-39, wherein, The following relationship is met between the focal length F1 of the first lens of the optical lens and the focal length F2 of the second lens of the optical lens: -1.5≤F1 / F2≤-0.

6.

66. The optical lens of any of claims 33-39, wherein, The following relationship is met between the focal length F1 of the first lens of the optical lens and the overall focal length F of the optical lens: 45≤F1≤59.

094.

67. The optical lens of any of claims 33-39, wherein, At least one of the following is met: 0.35≤D5 / F≤0.503, 2.310≤|F6 / F|≤3.046, 45≤F1≤58.609, where D5 corresponds to the clear aperture of the stop, F is the overall focal length of the optical lens, F6 is the focal length of the sixth lens of the optical lens, and F1 is the focal length of the first lens of the optical lens.

68. An imaging device, comprising: An imaging element that converts an optical image formed by the optical lens of any one of claims 1 to 67 into an electric signal. An imaging element that converts an optical image formed by the optical lens of any one of claims 1 to 67 into an electric signal.

Images