Optical lens and electronic equipment with same

Abstract

The invention provides an optical lens and electronic equipment with the optical lens, and the optical lens comprises a first lens which has positive focal power, and the first side surface of the first lens is a convex surface; the second lens has negative focal power, and the first side face of the second lens and the second side face of the second lens are both concave faces; the third lens has positive focal power, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the first side face of the fourth lens is a convex face; the fifth lens has positive focal power, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface; and the sixth lens has positive focal power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface. The problems that in the prior art, an optical lens is difficult to miniaturize, the imaging quality is poor in a dark environment, small FNO is difficult to achieve, and at least one of ghost images is serious are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens and an electronic device having the same. Background Art

[0002] With the development of science and technology and the increase in application needs, optical lenses have been widely used in many devices, and users have higher and higher requirements for optical lenses. In order to improve the imaging quality, optical lenses use a large number of lenses, but with the improvement of equipment integration, optical lenses need to have a smaller size to adapt to installation. Especially for LiDAR lenses, it is a key component for automatic driving assistance systems to obtain external information. With the rapid development of automatic driving assistance systems, users have higher and higher demands for LiDAR lenses. In order to meet the requirements of safe driving and special installation positions, LiDAR lenses in automatic driving assistance systems have more special requirements. However, the existing optical lenses cannot meet the requirements of small front port diameter and miniaturization at the same time, and there is also the problem of weak light transmission ability, which cannot adapt to the darker environment at night or on rainy days. In addition, the existing optical lenses cannot meet the requirements of small FNO at the same time. At the same time, they are affected by ghost images, the clarity of the picture is limited, and they cannot meet user needs.

[0003] That is to say, the optical lens in the prior art has at least one of the following problems: difficulty in miniaturization, poor imaging quality in dark environments, difficulty in achieving a small FNO, and severe ghosting. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the problems in the prior art that the optical lens is difficult to miniaturize, has poor imaging quality in a dark environment, is difficult to achieve a small FNO, and has serious ghost images.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive focal power, and a first side surface of the first lens being a convex surface; a second lens, the second lens having negative focal power, and a first side surface of the second lens and a second side surface of the second lens are both concave surfaces; a third lens, the third lens having positive focal power, and a second side surface of the third lens being a convex surface; a fourth lens, the fourth lens having positive focal power, and a first side surface of the fourth lens being a convex surface; a fifth lens, the fifth lens having positive focal power, a first side surface of the fifth lens being a convex surface, and a second side surface of the fifth lens being a concave surface; and a sixth lens, the sixth lens having positive focal power, a first side surface of the sixth lens being a convex surface, and a second side surface of the sixth lens being a concave surface.

[0006] Furthermore, the second side surface of the first lens is a concave surface.

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

[0008] Furthermore, the first side surface of the third lens is a concave surface.

[0009] Furthermore, the first side surface of the third lens is a convex surface.

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

[0011] Furthermore, the second side surface of the fourth lens is a convex surface.

[0012] Furthermore, the optical lens also includes a stop, and the stop is located between the fourth lens and the fifth lens.

[0013] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.4.

[0014] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / tan(FOV)≤15.

[0015] Furthermore, the maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D / H / θ≤8.

[0016] Furthermore, the maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: D / H / FOV≤0.15.

[0017] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.15.

[0018] Furthermore, the optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≤0.3.

[0019] Furthermore, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL≤0.3.

[0020] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: |F3 / F4|≤1.7.

[0021] Furthermore, the vector height SAG4 of the second side surface of the second lens and the maximum light clearance diameter D4 of the second side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy the following: arctan(SAG4 / D4)≥2.

[0022] Furthermore, a curvature radius R7 of the first side surface of the fourth lens and a curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤2.

[0023] Furthermore, the focal length value F of the entire optical lens group, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.6≤|F / R3|+|F / R4|≤1.3.

[0024] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.

[0025] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 1≤F / H≤3.

[0026] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5.

[0027] Furthermore, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤5.

[0028] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F≥1.5.

[0029] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1.

[0030] Furthermore, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥1.

[0031] Furthermore, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≥2.

[0032] Furthermore, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F≥1.

[0033] Furthermore, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F≥2.5.

[0034] Furthermore, a radius of curvature R2 of the second side surface of the first lens and a radius of curvature R3 of the first side surface of the second lens satisfy: 0.2≤(R2-R3) / (R2+R3)≤2.3.

[0035] Furthermore, the center thickness of the m-th lens on the optical axis of the optical lens is the largest among the center thicknesses of the lenses of all optical lenses, the center thickness of the n-th lens on the optical axis is the smallest among the center thicknesses of the lenses of all optical lenses, and the center thickness dm of the m-th lens on the optical axis and the center thickness dn of the n-th lens on the optical axis satisfy: 0≤dn / dm≤0.8, where m and n are values ​​selected from 1, 2, 3, 4, 5, and 6.

[0036] Furthermore, a distance T23 between the second lens and the third lens on the optical axis of the optical lens and a total optical length TTL of the optical lens satisfy: T23 / TTL≥0.08.

[0037] Furthermore, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.1.

[0038] According to another aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having positive optical power; a second lens, the second lens having negative optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having positive optical power; a fifth lens, the fifth lens having positive optical power; and a sixth lens, the sixth lens having positive optical power; wherein a curvature radius R3 of a first side surface of the second lens and a curvature radius R4 of a second side surface of the second lens satisfy the following relationship: R3 / R4≤-0.1.

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

[0040] Furthermore, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

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

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

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

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

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

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

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

[0048] Furthermore, the optical lens also includes a stop, and the stop is located between the fourth lens and the fifth lens.

[0049] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.4.

[0050] Furthermore, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / tan(FOV)≤15.

[0051] Furthermore, the maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D / H / θ≤8.

[0052] Furthermore, the maximum light clearance aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following: D / H / FOV≤0.15.

[0053] Furthermore, the entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.15.

[0054] Furthermore, the optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≤0.3.

[0055] Furthermore, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL≤0.3.

[0056] Furthermore, the focal length F3 of the third lens element and the focal length F4 of the fourth lens element satisfy: |F3 / F4|≤1.7.

[0057] Furthermore, the vector height SAG4 of the second side surface of the second lens and the maximum light clearance diameter D4 of the second side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy the following: arctan(SAG4 / D4)≥2.

[0058] Furthermore, a curvature radius R7 of the first side surface of the fourth lens and a curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤2.

[0059] Furthermore, the focal length value F of the entire optical lens group, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.6≤|F / R3|+|F / R4|≤1.3.

[0060] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1.

[0061] Furthermore, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 1≤F / H≤3.

[0062] Furthermore, the entire focal length value F of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5.

[0063] Furthermore, the total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤5.

[0064] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F≥1.5.

[0065] Furthermore, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1.

[0066] Furthermore, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≥1.

[0067] Furthermore, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F≥2.

[0068] Furthermore, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F≥1.

[0069] Furthermore, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F≥2.5.

[0070] Furthermore, a radius of curvature R2 of the second side surface of the first lens and a radius of curvature R3 of the first side surface of the second lens satisfy: 0.2≤(R2-R3) / (R2+R3)≤2.3.

[0071] Furthermore, the center thickness of the m-th lens on the optical axis of the optical lens is the largest among the center thicknesses of the lenses of all optical lenses, the center thickness of the n-th lens on the optical axis is the smallest among the center thicknesses of the lenses of all optical lenses, and the center thickness dm of the m-th lens on the optical axis and the center thickness dn of the n-th lens on the optical axis satisfy: 0≤dn / dm≤0.8, where m and n are values ​​selected from 1, 2, 3, 4, 5, and 6.

[0072] Furthermore, a distance T23 between the second lens and the third lens on the optical axis of the optical lens and a total optical length TTL of the optical lens satisfy: T23 / TTL≥0.08.

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

[0074] The above technical solution is conducive to light convergence by setting the first lens to have positive focal length. By setting the first side of the first lens to be convex, it is possible to collect as much light of a large field of view as possible to enter the rear optical system, increase the amount of light passing through, and improve the illumination. At the same time, it is conducive to controlling the aperture of the rear lens and realizing a small-aperture design. In addition, in practical applications, it is conducive to the sliding of water droplets and reduces the impact on imaging. Optionally, the second side of the first lens is concave, which can control the direction of large-angle light at the edge of the lens, which is conducive to a smooth transition of light and can reduce the sensitivity of the optical lens. Of course, the second side of the first lens can also be set to a convex surface, that is, the shape of the first lens is biconvex and the lens shape is flat, so that the light can enter the rear smoothly, and further make the light trend transition smoothly. It should be noted that the first lens preferably uses a high refractive index material, which is conducive to reducing the front port diameter and improving the imaging quality.

[0075] By setting the second lens to have a negative focal length, it is helpful to properly diffuse the light and smoothly transition the light to the third lens and the rear optical lens. By setting the first side surface of the second lens and the second side surface of the second lens to be concave, it is helpful to reduce the ghost image reflected by the BPF (bandpass filter) and improve the imaging quality.

[0076] By setting the third lens to have a positive optical power, it is beneficial for light to converge quickly. By setting the second side of the third lens to be convex, the light is further converged and smoothly enters the rear optical system. Optionally, the first side of the third lens is concave, which is beneficial to achieve a small FNO of the optical lens when the aperture of the third lens is fixed. Of course, the first side of the third lens can also be set to a convex surface, that is, the shape of the third lens is biconvex, so that the light diverged at the front end converges quickly and is beneficial to achieve a small FNO of the optical lens when the aperture of the third lens is fixed.

[0077] By setting the fourth lens to have positive focal power, it is beneficial for light to converge quickly. By setting the first side of the fourth lens to be convex, the large-diameter light at the front end can be smoothly transitioned to the rear optical system. Optionally, the second side of the fourth lens is concave, that is, the shape of the fourth lens is a crescent, which is beneficial for the smooth transition of light and allows the divergent light to enter the rear smoothly. Of course, the second side of the fourth lens can also be set to be convex, that is, the shape of the fourth lens is biconvex, which can compress the angle of the incident light, achieve a smooth transition of light, allow the divergent light to enter the rear smoothly, and further make the light trend smooth, which is beneficial to reducing the aperture of the rear end lens.

[0078] By setting the fifth lens to have a positive focal length, it is beneficial for light to converge quickly. By setting the first side surface of the fifth lens to be a convex surface and the second side surface of the fifth lens to be a concave surface, that is, the shape of the fifth lens is a meniscus, the front large-diameter light can quickly and smoothly enter the rear optical system, reducing the back focus to a certain extent, thereby reducing the total length of the optical lens. At the same time, it is beneficial to improve the resolution.

[0079] By setting the sixth lens to have a positive focal length, it is beneficial for light to converge quickly to the imaging surface. By setting the first side surface of the sixth lens to be a convex surface and the second side surface of the sixth lens to be a concave surface, the shape of the sixth lens is approximately concentric circles, which can make the light converge quickly and smoothly to the chip surface, further making the light trend smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

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

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

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

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

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

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

[0088] Figure 8 A cross-sectional view of an optical lens according to Example 8 of the present invention is shown;

[0089] Fig. 9 A cross-sectional view of an optical lens according to Example 9 of the present invention is shown;

[0090] Fig.10 A cross-sectional view of an optical lens according to Example 10 of the present invention is shown.

[0091] The above drawings include the following reference numerals:

[0092] STO, aperture; L1, first lens; S1, first side surface of first lens; S2, second side surface of first lens; L2, second lens; S3, first side surface of second lens; S4, second side surface of second lens; L3, third lens; S5, first side surface of third lens; S6, second side surface of third lens; L4, fourth lens; S7, first side surface of fourth lens; S8, second side surface of fourth lens; L5, fifth lens; S9, first side surface of fifth lens; S10, second side surface of fifth lens;

[0093] L6, sixth lens; S11, first side surface of sixth lens; S12, second side surface of sixth lens; L7, filter; S13, first side surface of filter; S14, second side surface of filter; L8, protective glass; S15, first side surface of protective glass; S16, second side surface of protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0094] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0095] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0096] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0097] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0098] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0099] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the first side of the lens, and the surface of each lens close to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0100] This application generally protects an ordinary optical lens. In the accompanying drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side and the second side is the image side.

[0101] In an exemplary embodiment, the optical lens provided by the present application can be used as, for example, a vehicle-mounted lens. Light from the object side can form an image on the image side.

[0102] When the optical lens in the present application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in the present application can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0103] In order to solve at least one of the problems in the prior art that optical lenses are difficult to miniaturize, have poor imaging quality in dark environments, are difficult to achieve small FNO, and have serious ghost images, the present invention provides an optical lens and an electronic device having the same.

[0104] Embodiment 1

[0105] like Figures 1 to 10 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens has positive focal power, and the first side surface of the first lens is convex; the second lens has negative focal power, and the first side surface of the second lens and the second side surface of the second lens are both concave; the third lens has positive focal power, and the second side surface of the third lens is convex; the fourth lens has positive focal power, and the first side surface of the fourth lens is convex; the fifth lens has positive focal power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave; the sixth lens has positive focal power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0106] By setting the first lens to have a positive focal length, it is beneficial to converge light. By setting the first side surface of the first lens to be a convex surface, it is possible to collect as much light of a large field of view as possible to enter the rear optical system, increase the amount of light passing through, improve the illumination, and at the same time, it is beneficial to control the aperture of the rear lens to achieve a small aperture design. In addition, in practical applications, it is beneficial to the sliding of water droplets and reduce the impact on imaging.

[0107] Optionally, the second side surface of the first lens is a concave surface, which can control the direction of large-angle light at the edge of the lens, facilitate smooth transition of light, and reduce the sensitivity of the optical lens.

[0108] Of course, the second side surface of the first lens may also be set to be a convex surface, that is, the shape of the first lens is double convex and the lens shape is flat, so that the light can enter the rear smoothly and further make the light trend transition smoothly.

[0109] It should be noted that the first lens preferably uses a high refractive index material, which is beneficial to reducing the front port diameter and improving the imaging quality.

[0110] By setting the second lens to have a negative focal length, it is helpful to properly diffuse the light and smoothly transition the light to the third lens and the rear optical lens. By setting the first side surface of the second lens and the second side surface of the second lens to be concave, it is helpful to reduce the ghost image reflected by the BPF (bandpass filter) and improve the imaging quality.

[0111] By setting the third lens to have a positive focal length, it is beneficial for light to converge quickly. By setting the second side surface of the third lens to be a convex surface, the light can be further converged and smoothly enter the rear optical system.

[0112] Optionally, the first side surface of the third lens is a concave surface, which is conducive to achieving a small FNO of the optical lens when the aperture of the third lens is fixed.

[0113] Of course, the first side surface of the third lens may also be set to be a convex surface, that is, the shape of the third lens is biconvex, so that the light diverging from the front end can be quickly converged and it is beneficial to achieve a small FNO of the optical lens when the aperture of the third lens is fixed.

[0114] By setting the fourth lens to have a positive focal power, it is beneficial for light to converge quickly. By setting the first side surface of the fourth lens to be a convex surface, the front large-diameter light can be smoothly transferred to the rear optical system.

[0115] Optionally, the second side surface of the fourth lens is a concave surface, that is, the shape of the fourth lens is a meniscus, which is conducive to a smooth transition of light and allows the divergent light to smoothly enter the rear.

[0116] Of course, the second side surface of the fourth lens can also be set to be convex, that is, the shape of the fourth lens is double convex, which can compress the angle of the incident light, achieve a smooth transition of the light, and make the divergent light enter the rear smoothly, further making the light trend smooth, which is conducive to reducing the aperture of the rear end lens.

[0117] By setting the fifth lens to have a positive focal length, it is beneficial for light to converge quickly. By setting the first side surface of the fifth lens to be a convex surface and the second side surface of the fifth lens to be a concave surface, that is, the shape of the fifth lens is a meniscus, the front large-diameter light can quickly and smoothly enter the rear optical system, reducing the back focus to a certain extent, thereby reducing the total length of the optical lens. At the same time, it is beneficial to improve the resolution.

[0118] By setting the sixth lens to have a positive focal length, it is beneficial for light to converge quickly to the imaging surface. By setting the first side surface of the sixth lens to be a convex surface and the second side surface of the sixth lens to be a concave surface, the shape of the sixth lens is approximately concentric circles, which can make the light converge quickly and smoothly to the chip surface, further making the light trend smooth.

[0119] In this embodiment, the optical lens further includes an aperture, which is located between the fourth lens and the fifth lens, which is beneficial for the light entering the optical lens to effectively and smoothly transition to the rear end of the system, reduce the lens aperture at the rear end of the optical lens, and reduce the assembly sensitivity of the optical lens.

[0120] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.4. By limiting TTL / H / FOV within a reasonable range, it is beneficial to reduce the total length of the optical lens under the premise of the same image height and field of view, which is beneficial to the miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.3.

[0121] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / tan(FOV)≤15. By limiting TTL / H / tan(FOV) within a reasonable range, it is beneficial to reduce the total length of the optical lens under the premise of the same image height and field of view, which is beneficial to the miniaturization of the optical lens. Preferably, TTL / H / tan(FOV)≤13.

[0122] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D / H / θ≤8. By limiting D / H / θ within a reasonable range, it is beneficial to control the front diameter of the optical lens to be smaller, which is beneficial to the miniaturization of the optical lens. Preferably, D / H / θ≤7.

[0123] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.15. By limiting D / H / FOV within a reasonable range, it is beneficial to control the front port diameter of the optical lens to be smaller, which is beneficial to the miniaturization of the optical lens. Preferably, D / H / FOV≤0.13.

[0124] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.15. By limiting (F*θ) / D within a reasonable range, the front port diameter of the optical lens can be made smaller, and the volume of the optical lens can be reduced while ensuring the imaging quality. Preferably, (F*θ) / D≥0.25.

[0125] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: BFL / TTL≤0.3. By limiting BFL / TTL within a reasonable range, the back focus is short on the basis of achieving a small FNO, which is conducive to the compactness of the module and makes the length of the entire optical lens shorter. Preferably, BFL / TTL≤0.18.

[0126] In this embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL≤0.3. By limiting BFL / TL within a reasonable range, the back focus is short on the basis of achieving a small FNO, which is conducive to the compactness of the module and the length of the entire optical lens is small. Preferably, BFL / TL≤0.2.

[0127] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: |F3 / F4|≤1.7. By limiting |F3 / F4| within a reasonable range, the focal lengths of the adjacent third lens and fourth lens are close, which can avoid the situation where the focal length of one lens is too small or too large, causing the light trend to be sharply deflected, which helps to smoothly transition the light and improve the image quality. Preferably, |F3 / F4|≤1.5.

[0128] In this embodiment, the vector height SAG4 of the second side surface of the second lens and the maximum aperture D4 of the second side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy: arctan (SAG4 / D4) ≥ 2. By limiting arctan (SAG4 / D4) within a reasonable range, controlling the vector height and aperture of the second side surface of the second lens, and controlling the surface angle, the ghost image generated by the reflection of the second side surface of the color filter and the second lens can be improved. Preferably, arctan (SAG4 / D4) ≥ 3.

[0129] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤2. By limiting |R7 / R8| within a reasonable range, it is helpful to control the curvature radius of the first side surface and the second side surface of the fourth lens, collect more light, and increase the light transmission capacity of the system. Preferably, |R7 / R8|≤1.8.

[0130] In this embodiment, the focal length value F of the entire optical lens, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.6≤|F / R3|+|F / R4|≤1.3. By limiting |F / R3|+|F / R4| within a reasonable range and controlling the radius of curvature of the first side surface and the second side surface of the second lens, the light incident from the front optical system can be assisted to smoothly enter the rear optical system and improve the imaging quality, while reducing the sensitivity of the optical lens. Preferably, 0.8≤|F / R3|+|F / R4|≤1.2.

[0131] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1. By limiting F / ENPD within a reasonable range, it is beneficial to achieve a small FNO of the optical lens and also to increase the amount of light passing. Preferably, F / ENPD≤0.8.

[0132] In this embodiment, the focal length value F of the entire set of optical lenses and the image height H corresponding to the maximum field of view of the optical lenses satisfy: 1≤F / H≤3. By limiting F / H within a reasonable range, the ratio of focal length to image height is controlled within a certain range, which is conducive to improving the resolution and avoiding the optical lens from appearing abnormal due to an exaggerated image height or focal length. Reasonable image height and focal length can improve the imaging quality of the optical lens. Preferably, 1.5≤F / H≤2.4.

[0133] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5. By limiting (H / 2) / (F*tan(θ / 2)) within a reasonable range, the ratio of the actual image height to the ideal image height is controlled, which is conducive to achieving a large angular resolution. Preferably, 0.8≤(H / 2) / (F*tan(θ / 2))≤1.2.

[0134] In this embodiment, the total optical length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤5. By limiting TTL / F within a reasonable range, it is beneficial to miniaturize the optical lens, but if TTL / F is too small, the system sensitivity will be high. A larger TTL / F is beneficial to adjust the resolution and system sensitivity. Preferably, 3≤TTL / F≤4.2.

[0135] In this embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F ≥ 1.5. By limiting F1 / F within a reasonable range and reasonably allocating the focal length of the first lens, light is converged, which is conducive to large field angle light entering the optical system and improving illumination. Preferably, 1.8 ≤ F1 / F ≤ 3.

[0136] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1. By limiting F2 / F within a reasonable range and setting the focal length of the second lens to a negative focal length, it is beneficial to properly diffuse the light, so that the light trend smoothly transitions to the third lens and the rear optical system, which is beneficial to improve the resolution. Preferably, -1.5≤F2 / F≤-0.6.

[0137] In this embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F ≥ 1. By limiting F3 / F within a reasonable range and reasonably allocating the focal length of the third lens, it is beneficial to quickly converge the light, so that the light diverging from the front end quickly and smoothly enters the rear optical system, which is beneficial to achieve a small FNO of the system when the aperture of the third lens is fixed. Preferably, 2.4≤F3 / F≤6.

[0138] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F ≥ 2. By limiting F4 / F within a reasonable range and reasonably allocating the focal length of the fourth lens, it is beneficial to quickly converge the light and make the front large-diameter light smoothly transition to the rear optical system. Preferably, 3.6≤F4 / F≤6.5.

[0139] In this embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F ≥ 1. By limiting F5 / F within a reasonable range and reasonably allocating the focal length of the fifth lens, it is beneficial to quickly focus the large-angle peripheral light entering through the fifth lens, thereby improving the imaging quality. Preferably, 1.5 ≤ F5 / F ≤ 4.

[0140] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F ≥ 2.5. By limiting F6 / F within a reasonable range and reasonably allocating the focal length of the sixth lens, it is beneficial for the large-angle peripheral light entering through the sixth lens to quickly converge to the image plane. Preferably, 3 ≤ F6 / F ≤ 11.

[0141] In this embodiment, the curvature radius R2 of the second side surface of the first lens and the curvature radius R3 of the first side surface of the second lens satisfy: 0.2≤(R2-R3) / (R2+R3)≤2.3. By limiting (R2-R3) / (R2+R3) within a reasonable range, it is ensured that when the light emitted from the first lens is incident on the first side surface of the second lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical lens. Preferably, 0.4≤(R2-R3) / (R2+R3)≤2.

[0142] In this embodiment, the center thickness of the m-th lens on the optical axis of the optical lens is the largest among the center thicknesses of the lenses of all optical lenses, and the center thickness of the n-th lens on the optical axis is the smallest among the center thicknesses of the lenses of all optical lenses. The center thickness dm of the m-th lens on the optical axis and the center thickness dn of the n-th lens on the optical axis satisfy: 0≤dn / dm≤0.8, where m and n are taken from 1, 2, 3, 4, 5, and 6. By limiting dn / dm to a reasonable range, the center thicknesses of the first to sixth lenses are close, which helps to reduce the overall light deflection change of the optical lens at high and low temperatures and has good temperature performance. Preferably, 0.1≤dn / dm≤0.6.

[0143] In this embodiment, the distance T23 between the second lens and the third lens on the optical axis of the optical lens and the total optical length TTL of the optical lens satisfy: T23 / TTL≥0.08. By limiting T23 / TTL within a reasonable range, controlling the distance of T23 is conducive to system miniaturization, and when the third lens can quickly receive the light from the second lens, it can avoid the rapid deflection of the light inside the third lens due to the excessive length of T23. This rapid deflection is not good for the sensitivity of the system, so reasonable control of T23 is conducive to reducing the tolerance sensitivity of the optical lens, and is also conducive to a small FNO of the optical lens. Preferably, 0.12≤T23 / TTL≤0.2.

[0144] In this embodiment, the curvature radius R3 of the first side surface of the second lens and the curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.1. By limiting R3 / R4 within a reasonable range, the biconcave shape of the second lens is conducive to proper diffusion of light, so that the light trend smoothly transitions to the third lens and the rear optical system. At the same time, the second side surface of the second lens is set as a concave surface. The smaller the R value of the second side surface of the second lens is, the more conducive it is to reduce the ghost image reflected by the BPF. However, the R value cannot be infinitely small, and a too small R value is not conducive to the processing of the second lens. Preferably, -0.8≤R3 / R4≤-0.3.

[0145] Embodiment 2

[0146] like Figures 1 to 10 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the first lens has positive focal power; the second lens has negative focal power; the third lens has positive focal power; the fourth lens has positive focal power; the fifth lens has positive focal power; and the sixth lens has positive focal power; wherein a curvature radius R3 of a first side surface of the second lens and a curvature radius R4 of a second side surface of the second lens satisfy: R3 / R4≤-0.1.

[0147] By setting the first lens to have a positive focal power, it is beneficial to converge light. By setting the second lens to have a negative focal power, it is beneficial to properly diffuse the light, so that the light trend smoothly transitions to the third lens and the rear optical lens. By setting the third lens to have a positive focal power, it is beneficial to quickly converge light. By setting the fourth lens to have a positive focal power, it is beneficial to quickly converge light. By setting the fifth lens to have a positive focal power, it is beneficial to quickly converge light. By setting the sixth lens to have a positive focal power, it is beneficial to quickly converge light to the imaging surface.

[0148] By limiting R3 / R4 within a reasonable range, the biconcave shape of the second lens is conducive to proper diffusion of light, allowing the light to smoothly transition to the third lens and the rear optical system. At the same time, the second side surface of the second lens is set to a concave surface. The smaller the R value of the second side surface of the second lens, the more conducive it is to reducing the ghost image reflected by the BPF. However, the R value cannot be infinitely small. Too small an R value is not conducive to the processing of the second lens.

[0149] Preferably, a radius of curvature R3 of the first side surface of the second lens and a radius of curvature R4 of the second side surface of the second lens satisfy: -0.8≤R3 / R4≤-0.3.

[0150] By setting the first side of the first lens to be convex, it is possible to collect as much light of a large field of view as possible to enter the rear optical system, increase the amount of light passing through, and improve the illumination. At the same time, it is beneficial to control the aperture of the rear lens and realize a small-aperture design. In addition, in practical applications, it is beneficial to the sliding of water droplets and reduce the impact on imaging. Optionally, the second side of the first lens is concave, which can control the direction of large-angle light at the edge of the lens, which is beneficial to the smooth transition of light and can reduce the sensitivity of the optical lens. Of course, the second side of the first lens can also be set to a convex surface, that is, the shape of the first lens is biconvex and the lens shape is flat, so that the light can enter the rear smoothly and further make the light trend transition smoothly.

[0151] It should be noted that the first lens preferably uses a high refractive index material, which is beneficial to reducing the front port diameter and improving the imaging quality.

[0152] By setting the first side surface of the second lens and the second side surface of the second lens to be concave surfaces, it is helpful to reduce the ghost image reflected by the BPF (band pass filter) and improve the imaging quality.

[0153] By setting the second side of the third lens to be convex, the light is further converged and smoothly enters the rear optical system. Optionally, the first side of the third lens is concave, which is conducive to achieving a small FNO of the optical lens when the aperture of the third lens is fixed. Of course, the first side of the third lens can also be set to be convex, that is, the shape of the third lens is biconvex, so that the light diverging from the front end can be quickly converged and it is conducive to achieving a small FNO of the optical lens when the aperture of the third lens is fixed.

[0154] By setting the first side surface of the fourth lens to be convex, the large-diameter light at the front end can be smoothly transitioned to the rear optical system. Optionally, the second side surface of the fourth lens is concave, that is, the shape of the fourth lens is a crescent, which is conducive to the smooth transition of light and allows the divergent light to enter the rear smoothly. Of course, the second side surface of the fourth lens can also be set to be convex, that is, the shape of the fourth lens is double convex, which can compress the angle of the incident light, achieve a smooth transition of light, allow the divergent light to enter the rear smoothly, further stabilize the light trend, and help reduce the diameter of the rear end lens.

[0155] By setting the first side surface of the fifth lens to be convex and the second side surface of the fifth lens to be concave, that is, the shape of the fifth lens is a meniscus, the front large-diameter light can quickly and smoothly enter the rear optical system, reducing the back focus to a certain extent, thereby reducing the total length of the optical lens. At the same time, it is beneficial to improve the resolution.

[0156] By setting the first side surface of the sixth lens to be convex and the second side surface of the sixth lens to be concave, the shape of the sixth lens is approximately concentric circles, which can make the light quickly and smoothly converge to the chip surface, further making the light trend stable.

[0157] In this embodiment, the optical lens further includes an aperture, which is located between the fourth lens and the fifth lens, which is beneficial for the light entering the optical lens to effectively and smoothly transition to the rear end of the system, reduce the lens aperture at the rear end of the optical lens, and reduce the assembly sensitivity of the optical lens.

[0158] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: TTL / H / FOV≤0.4. By limiting TTL / H / FOV within a reasonable range, it is beneficial to reduce the total length of the optical lens under the premise of the same image height and field of view, which is beneficial to the miniaturization of the optical lens. Preferably, TTL / H / FOV≤0.3.

[0159] In this embodiment, the total optical length TTL of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / tan(FOV)≤15. By limiting TTL / H / tan(FOV) within a reasonable range, it is beneficial to reduce the total length of the optical lens under the premise of the same image height and field of view, which is beneficial to the miniaturization of the optical lens. Preferably, TTL / H / tan(FOV)≤13.

[0160] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: D / H / θ≤8. By limiting D / H / θ within a reasonable range, it is beneficial to control the front diameter of the optical lens to be smaller, which is beneficial to the miniaturization of the optical lens. Preferably, D / H / θ≤7.

[0161] In this embodiment, the maximum aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.15. By limiting D / H / FOV within a reasonable range, it is beneficial to control the front port diameter of the optical lens to be smaller, which is beneficial to the miniaturization of the optical lens. Preferably, D / H / FOV≤0.13.

[0162] In this embodiment, the focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F*θ) / D≥0.15. By limiting (F*θ) / D within a reasonable range, the front port diameter of the optical lens can be made smaller, and the volume of the optical lens can be reduced while ensuring the imaging quality. Preferably, (F*θ) / D≥0.25.

[0163] In this embodiment, the optical back focus BFL of the optical lens and the optical total length TTL of the optical lens satisfy: BFL / TTL≤0.3. By limiting BFL / TTL within a reasonable range, the back focus is short on the basis of achieving a small FNO, which is conducive to the compactness of the module and makes the length of the entire optical lens shorter. Preferably, BFL / TTL≤0.18.

[0164] In this embodiment, the optical back focus BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL≤0.3. By limiting BFL / TL within a reasonable range, the back focus is short on the basis of achieving a small FNO, which is conducive to the compactness of the module and the length of the entire optical lens is small. Preferably, BFL / TL≤0.2.

[0165] In this embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: |F3 / F4|≤1.7. By limiting |F3 / F4| within a reasonable range, the focal lengths of the adjacent third lens and fourth lens are close, which can avoid the situation where the focal length of one lens is too small or too large, causing the light trend to be sharply deflected, which helps to smoothly transition the light and improve the image quality. Preferably, |F3 / F4|≤1.5.

[0166] In this embodiment, the vector height SAG4 of the second side surface of the second lens and the maximum aperture D4 of the second side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy: arctan (SAG4 / D4) ≥ 2. By limiting arctan (SAG4 / D4) within a reasonable range, controlling the vector height and aperture of the second side surface of the second lens, and controlling the surface angle, the ghost image generated by the reflection of the second side surface of the color filter and the second lens can be improved. Preferably, arctan (SAG4 / D4) ≥ 3.

[0167] In this embodiment, the curvature radius R7 of the first side surface of the fourth lens and the curvature radius R8 of the second side surface of the fourth lens satisfy: |R7 / R8|≤2. By limiting |R7 / R8| within a reasonable range, it is helpful to control the curvature radius of the first side surface and the second side surface of the fourth lens, collect more light, and increase the light transmission capacity of the system. Preferably, |R7 / R8|≤1.8.

[0168] In this embodiment, the focal length value F of the entire optical lens, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: 0.6≤|F / R3|+|F / R4|≤1.3. By limiting |F / R3|+|F / R4| within a reasonable range and controlling the radius of curvature of the first side surface and the second side surface of the second lens, the light incident from the front optical system can be assisted to smoothly enter the rear optical system and improve the imaging quality, while reducing the sensitivity of the optical lens. Preferably, 0.8≤|F / R3|+|F / R4|≤1.2.

[0169] In this embodiment, the focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤1. By limiting F / ENPD within a reasonable range, it is beneficial to achieve a small FNO of the optical lens and also to increase the amount of light passing. Preferably, F / ENPD≤0.8.

[0170] In this embodiment, the focal length value F of the entire set of optical lenses and the image height H corresponding to the maximum field of view of the optical lenses satisfy: 1≤F / H≤3. By limiting F / H within a reasonable range, the ratio of focal length to image height is controlled within a certain range, which is conducive to improving the resolution and avoiding the optical lens from appearing abnormal due to an exaggerated image height or focal length. Reasonable image height and focal length can improve the imaging quality of the optical lens. Preferably, 1.5≤F / H≤2.4.

[0171] In this embodiment, the focal length value F of the entire optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F*tan(θ / 2))≤1.5. By limiting (H / 2) / (F*tan(θ / 2)) within a reasonable range, the ratio of the actual image height to the ideal image height is controlled, which is conducive to achieving a large angular resolution. Preferably, 0.8≤(H / 2) / (F*tan(θ / 2))≤1.2.

[0172] In this embodiment, the total optical length TTL of the optical lens and the focal length F of the entire optical lens group satisfy: TTL / F≤5. By limiting TTL / F within a reasonable range, it is beneficial to miniaturize the optical lens, but if TTL / F is too small, the system sensitivity will be high. A larger TTL / F is beneficial to adjust the resolution and system sensitivity. Preferably, 3≤TTL / F≤4.2.

[0173] In this embodiment, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: F1 / F ≥ 1.5. By limiting F1 / F within a reasonable range and reasonably allocating the focal length of the first lens, light is converged, which is conducive to large field angle light entering the optical system and improving illumination. Preferably, 1.8 ≤ F1 / F ≤ 3.

[0174] In this embodiment, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: F2 / F≤-0.1. By limiting F2 / F within a reasonable range and setting the focal length of the second lens to a negative focal length, it is beneficial to properly diffuse the light, so that the light trend smoothly transitions to the third lens and the rear optical system, which is beneficial to improve the resolution. Preferably, -1.5≤F2 / F≤-0.6.

[0175] In this embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F ≥ 1. By limiting F3 / F within a reasonable range and reasonably allocating the focal length of the third lens, it is beneficial to quickly converge the light, so that the light diverging from the front end quickly and smoothly enters the rear optical system, which is beneficial to achieve a small FNO of the system when the aperture of the third lens is fixed. Preferably, 2.4≤F3 / F≤6.

[0176] In this embodiment, the focal length value F4 of the fourth lens and the focal length value F of the entire optical lens group satisfy: F4 / F ≥ 2. By limiting F4 / F within a reasonable range and reasonably allocating the focal length of the fourth lens, it is beneficial to quickly converge the light and make the front large-diameter light smoothly transition to the rear optical system. Preferably, 3.6≤F4 / F≤6.5.

[0177] In this embodiment, the focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F ≥ 1. By limiting F5 / F within a reasonable range and reasonably allocating the focal length of the fifth lens, it is beneficial to quickly focus the large-angle peripheral light entering through the fifth lens, thereby improving the imaging quality. Preferably, 1.5 ≤ F5 / F ≤ 4.

[0178] In this embodiment, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: F6 / F ≥ 2.5. By limiting F6 / F within a reasonable range and reasonably allocating the focal length of the sixth lens, it is beneficial for the large-angle peripheral light entering through the sixth lens to quickly converge to the image plane. Preferably, 3 ≤ F6 / F ≤ 11.

[0179] In this embodiment, the curvature radius R2 of the second side surface of the first lens and the curvature radius R3 of the first side surface of the second lens satisfy: 0.2≤(R2-R3) / (R2+R3)≤2.3. By limiting (R2-R3) / (R2+R3) within a reasonable range, it is ensured that when the light emitted from the first lens is incident on the first side surface of the second lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical lens. Preferably, 0.4≤(R2-R3) / (R2+R3)≤2.

[0180] In this embodiment, the center thickness of the m-th lens on the optical axis of the optical lens is the largest among the center thicknesses of the lenses of all optical lenses, and the center thickness of the n-th lens on the optical axis is the smallest among the center thicknesses of the lenses of all optical lenses. The center thickness dm of the m-th lens on the optical axis and the center thickness dn of the n-th lens on the optical axis satisfy: 0≤dn / dm≤0.8, where m and n are taken from 1, 2, 3, 4, 5, and 6. By limiting dn / dm to a reasonable range, the center thicknesses of the first to sixth lenses are close, which helps to reduce the overall light deflection change of the optical lens at high and low temperatures and has good temperature performance. Preferably, 0.1≤dn / dm≤0.6.

[0181] In this embodiment, the distance T23 between the second lens and the third lens on the optical axis of the optical lens and the total optical length TTL of the optical lens satisfy: T23 / TTL≥0.08. By limiting T23 / TTL within a reasonable range, controlling the distance of T23 is conducive to system miniaturization, and when the third lens can quickly receive the light from the second lens, it can avoid the rapid deflection of the light inside the third lens due to the excessive length of T23. This rapid deflection is not good for the sensitivity of the system, so reasonable control of T23 is conducive to reducing the tolerance sensitivity of the optical lens, and is also conducive to a small FNO of the optical lens. Preferably, 0.12≤T23 / TTL≤0.2.

[0182] It should be noted that the total length TTL of the optical lens is the on-axis distance from the first side surface of the first lens to the imaging surface of the optical lens, the optical back focus BFL is the on-axis distance from the last lens to the imaging surface of the optical lens, and the lens group length TL of the optical lens is the on-axis distance from the first side surface of the first lens to the second side surface of the last lens.

[0183] Optionally, the optical lens may further include a filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0184] In an exemplary embodiment, the first lens to the sixth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the sixth lens may all be glass lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the sixth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the sixth lens in the optical lens may also be made of a combination of plastic and glass.

[0185] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0186] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0187] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0188] Example 1

[0189] like Figure 1As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0190] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0191] In this example, the focal length F of the optical lens is 18.170 mm, the total length TTL of the optical lens is 69.282 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0192] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0193] Surf Radius Thickness Nd Vd 0 Infinity Infinity 1 35.9711 7.3321 1.85 23.79 2 -278.2909 4.3458 3 -28.7763 2.6561 1.91 35.26 4 50.2585 10.9797 5 -33.4252 11.7651 1.52 64.20 6 -22.2567 0.1995 7 139.9868 5.2387 1.85 23.79 8 -139.9868 -0.6578 STO Infinity 0.8573 9 22.3918 7.8001 1.90 31.32 10 43.1019 0.1985 11 16.4296 8.2751 1.85 23.79 12 15.8230 3.5249 13 Infinity 1.1000 1.52 54.09 14 Infinity 3.9396 15 Infinity 0.5000 1.52 54.09 16 Infinity 1.2270 IMA Infinity 0.00E+00

[0194] Table 1

[0195] Example 2

[0196] like Figure 2 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0197] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0198] In this example, the focal length F of the optical lens is 18.165 mm, the total length TTL of the optical lens is 72.626 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0199] Table 2 shows the basic structural parameters of the optical lens of Example 2, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0200]

[0201]

[0202] Table 2

[0203] Example 3

[0204] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0205] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0206] In this example, the focal length F of the optical lens is 18.210 mm, the total length TTL of the optical lens is 68.372 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0207] Table 3 shows the basic structural parameters of the optical lens of Example 3, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0208]

[0209]

[0210] Table 3

[0211] Example 4

[0212] like Figure 4 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0213] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0214] In this example, the focal length F of the optical lens is 18.240 mm, the total length TTL of the optical lens is 73.539 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0215] Table 4 shows the basic structural parameters of the optical lens of Example 4, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0216]

[0217]

[0218] Table 4

[0219] Example 5

[0220] like Figure 5 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0221] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0222] In this example, the focal length F of the optical lens is 17.890 mm, the total length TTL of the optical lens is 67.619 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0223] Table 5 shows the basic structural parameters of the optical lens of Example 5, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0224]

[0225]

[0226] Table 5

[0227] Example 6

[0228] like Figure 6 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0229] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0230] In this example, the focal length F of the optical lens is 17.760 mm, the total length TTL of the optical lens is 67.498 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0231] Table 6 shows the basic structural parameters of the optical lens of Example 6, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0232]

[0233]

[0234] Table 6

[0235] Example 7

[0236] like Figure 7 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0237] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0238] In this example, the focal length F of the optical lens is 18.090 mm, the total length TTL of the optical lens is 65.870 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0239] Table 7 shows the basic structural parameters of the optical lens of Example 7, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0240]

[0241]

[0242] Table 7

[0243] Example 8

[0244] like Figure 8 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0245] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is concave. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0246] In this example, the focal length F of the optical lens is 18.140 mm, the total length TTL of the optical lens is 66.226 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0247] Table 8 shows the basic structural parameters of the optical lens of Example 8, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0248]

[0249]

[0250] Table 8

[0251] Example 9

[0252] like Fig. 9 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0253] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0254] In this example, the focal length F of the optical lens is 17.950 mm, the total length TTL of the optical lens is 67.082 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0255] Table 9 shows the basic structural parameters of the optical lens of Example 9, where the units of the radius of curvature and the thickness / distance are all in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0256]

[0257]

[0258] Table 9

[0259] Example 10

[0260] like Fig.10 As shown, the optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a filter L7, a protective glass L8 and an imaging surface IMA.

[0261] The first lens L1 has positive power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is convex. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. The sixth lens L6 has positive power, the first side surface S11 of the sixth lens is convex, and the second side surface S12 of the sixth lens is concave. The filter L7 has a first side surface S13 of the filter and a second side surface S14 of the filter. The protective glass L8 has a first side surface S15 of the protective glass and a second side surface S16 of the protective glass. Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface IMA.

[0262] In this example, the focal length F of the optical lens is 17.869 mm, the total length TTL of the optical lens is 66.261 mm, and the maximum field of view FOV of the optical lens is 31.700°.

[0263] Table 10 shows the basic structural parameters of the optical lens of Example 10, where the units of the radius of curvature and the thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0264]

[0265]

[0266] Table 10

[0267] In summary, Examples 1 to 10 respectively satisfy the relationship shown in Table 11.

[0268] Conditional / Example 1 2 3 4 5 6 7 8 9 10 TTL / H / FOV 0.235 0.246 0.233 0.250 0.229 0.227 0.223 0.224 0.223 0.218 TTL / H / tan(FOV) 12.044 12.606 11.953 12.820 11.740 11.656 11.468 11.523 11.438 11.211 D / H / θ 6.182 6.368 6.156 6.025 6.171 6.136 6.040 6.060 5.794 5.734 D / H / FOV 0.108 0.111 0.107 0.105 0.108 0.107 0.105 0.106 0.101 0.100 (F*θ) / D 0.316 0.306 0.319 0.326 0.311 0.309 0.322 0.322 0.326 0.326 BFL / TTL 0.149 0.142 0.149 0.139 0.152 0.152 0.158 0.159 0.148 0.149 BFL / TL 0.174 0.165 0.175 0.162 0.179 0.179 0.187 0.189 0.173 0.174 |F3 / F4| 1.113 1.190 1.372 1.185 0.920 0.884 0.871 0.942 0.453 0.441 arctan(SAG4 / D4) 3.807 3.688 4.077 4.243 3.946 3.967 4.151 4.383 3.740 3.608 |R7 / R8| 1.000 1.000 0.738 1.177 0.228 0.349 0.201 0.145 1.267 1.205 |F / R3|+|F / R4| 0.993 0.990 0.992 0.990 1.023 1.015 1.027 1.037 0.958 0.944 F / ENPD 0.713 0.712 0.714 0.715 0.702 0.696 0.709 0.711 0.704 0.701 F / H 1.951 1.947 1.966 1.964 1.918 1.894 1.945 1.949 1.890 1.867 (H / 2) / (F*tan(θ / 2)) 0.903 0.904 0.896 0.897 0.918 0.930 0.905 0.903 0.932 0.943 TTL / F 3.813 3.998 3.755 4.032 3.780 3.801 3.641 3.651 3.737 3.708 F1 / F 2.219 2.181 2.335 2.426 2.268 2.286 2.321 2.625 2.462 2.488 F2 / F -1.135 -1.117 -1.134 -1.140 -1.101 -1.109 -1.096 -1.086 -1.159 -1.179 F3 / F 5.414 5.636 5.513 5.124 4.614 4.528 4.413 4.460 2.764 2.667 F4 / F 4.865 4.738 4.017 4.324 5.017 5.119 5.067 4.736 6.108 6.048 F5 / F 2.531 2.602 2.996 3.006 2.584 2.657 2.473 2.277 2.569 2.705 F6 / F 5.843 6.109 3.964 4.004 4.727 4.377 4.362 5.604 10.662 9.829 (R2-R3) / (R2+R3) 0.813 0.583 1.265 1.788 0.818 0.816 1.187 1.635 0.916 0.905 dn / dm 0.226 0.484 0.274 0.215 0.248 0.248 0.275 0.277 0.405 0.452 T23 / TTL 0.158 0.158 0.160 0.149 0.154 0.153 0.154 0.144 0.168 0.169 R3 / R4 -0.573 -0.531 -0.614 -0.663 -0.548 -0.549 -0.576 -0.616 -0.520 -0.502

[0269] Table 11

[0270] Table 12 gives the focal length value F of the entire group of optical lenses of Examples 1 to 10, the focal length value F1 to F6 of each lens (unit: mm), etc.

[0271]

[0272]

[0273] Table 12

[0274] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0275] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0276] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0277] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: include: A first lens, wherein the first lens has positive optical power, and a first side surface of the first lens is a convex surface; A second lens, wherein the second lens has negative optical power, and a first side surface of the second lens and a second side surface of the second lens are both concave surfaces; A third lens, the third lens has positive optical power, and the second side surface of the third lens is a convex surface; a fourth lens having positive optical power, wherein a first side surface of the fourth lens is a convex surface; a fifth lens having positive optical power, a first side surface of the fifth lens being a convex surface, and a second side surface of the fifth lens being a concave surface; A sixth lens has positive optical power, a first side surface of the sixth lens is a convex surface, and a second side surface of the sixth lens is a concave surface.

2. The optical lens according to claim 1, characterized in that: The focal length value F4 of the fourth lens and the focal length value F of the entire group of the optical lens satisfy: F4 / F≥2.

3. The optical lens according to claim 1, characterized in that: The focal length value F5 of the fifth lens and the focal length value F of the entire optical lens group satisfy: F5 / F≥1.

4. The optical lens according to claim 1, characterized in that: The focal length value F6 of the sixth lens and the focal length value F of the entire set of optical lenses satisfy: F6 / F≥2.

5.

5. The optical lens according to claim 1, characterized in that: A curvature radius R2 of the second side surface of the first lens and a curvature radius R3 of the first side surface of the second lens satisfy: 0.2≤(R2-R3) / (R2+R3)≤2.

3.

6. The optical lens according to claim 1, characterized in that: The center thickness of the m-th lens on the optical axis of the optical lens is the largest among the center thicknesses of all lenses of the optical lens, and the center thickness of the n-th lens on the optical axis is the smallest among the center thicknesses of all lenses of the optical lens. The center thickness dm of the m-th lens on the optical axis and the center thickness dn of the n-th lens on the optical axis satisfy the following: 0≤dn / dm≤0.8, wherein m and n are values ​​selected from 1, 2, 3, 4, 5, and 6.

7. The optical lens according to claim 1, characterized in that: A distance T23 between the second lens and the third lens on the optical axis of the optical lens and a total optical length TTL of the optical lens satisfy the following: T23 / TTL≥0.

08.

8. The optical lens according to claim 1, characterized in that: A curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.

1.

9. An optical lens, characterized in that: include: a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having positive refractive power; a fifth lens having positive refractive power; a sixth lens having positive refractive power; Wherein, a curvature radius R3 of the first side surface of the second lens and a curvature radius R4 of the second side surface of the second lens satisfy: R3 / R4≤-0.

1.

10. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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