Optical lens and electronic equipment

Abstract

The invention provides an optical lens and electronic equipment. The optical lens sequentially comprises, from a first side to a second side, a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power, the second lens has positive focal power, and the first side surface of the second lens is a convex surface; the third lens has negative focal power, and the second side surface of the third lens is a concave surface; the fourth lens has negative focal power, and the second side surface of the fourth lens is a concave surface; 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; the first side face of the sixth lens is a convex face, and the second side face of the sixth lens is a concave face. According to the invention, the problems of large size, large CRA and poor light transmission capability of an optical lens in the prior art 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. Background Art

[0002] In recent years, with the development of science and technology, the demand for optical lenses in daily life has increased, and optical lenses have been applied to more and more scenes. For example, in the automobile driving industry, for driving safety, it is necessary to detect the driving environment more accurately, and optical lenses have become a key device for detecting information around the car. At the same time, with the rapid development of automobile automatic driving assistance systems, the number of optical lenses used in automobiles has gradually increased. In addition to the commonly used visible light applications, night vision lenses used in dark environments have also attracted more and more attention. However, there are various problems with current optical lenses. For example, the forward night telescopic optical lens has a small detection angle and a large focal length, and the overall size will also increase, which is inconsistent with the limited space of the automobile installation module and is not conducive to installation; and the light transmission capacity of the existing technology is limited, and it cannot adapt to the darker environment at night or on rainy days; and the large CRA is not conducive to the light reception of the chip, affecting the light transmission, which is not conducive to high resolution.

[0003] That is to say, the optical lens in the prior art has the problems of large size, large CRA and poor light transmission ability. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an electronic device to solve the problems of large size, large CRA and poor light transmission capacity of the optical lens in the prior art.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, an optical lens is provided, which comprises, from the first side to the second side: a first lens with positive optical power, wherein the first side surface of the first lens is convex, and the second side surface is concave; a second lens with positive optical power, wherein the first side surface of the second lens is convex; a third lens with negative optical power, wherein the second side surface of the third lens is concave; a fourth lens with negative optical power, wherein the second side surface of the fourth lens is concave; a fifth lens with optical power, wherein the first side surface of the fifth lens is convex, and the second side surface is concave; a sixth lens with optical power, wherein the first side surface of the sixth lens is convex, and the second side surface is concave.

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

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

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

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

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

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

[0012] Further, the fifth lens has positive refractive power.

[0013] Furthermore, the fifth lens has negative refractive power.

[0014] Furthermore, the sixth lens has negative refractive power.

[0015] Furthermore, the sixth lens has positive refractive power.

[0016] Furthermore, the second lens and the third lens are cemented together to form a doublet lens.

[0017] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0018] Furthermore, the sixth lens is an aspherical lens.

[0019] Furthermore, the sixth lens is configured to be retroflex.

[0020] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤1.8.

[0021] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.5.

[0022] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≤8.

[0023] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤2.0.

[0024] 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 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≤0.9.

[0025] 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 maximum field angle FOV of the optical lens satisfy: D / H / FOV≤0.15.

[0026] Furthermore, the maximum light clearance diameter 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≤6.8.

[0027] Furthermore, the maximum light clearance 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 entire focal length value F of the optical lens satisfy: D / H / F≤0.1.

[0028] 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: F / H≤4.2.

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

[0030] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1.

[0031] Furthermore, the aperture diameter DST of the optical lens and the entire focal length value F of the optical lens satisfy: DST / F≤1.

[0032] Further, a curvature radius R9 of the first side surface of the fifth lens and a center thickness d9 of the fifth lens satisfy: 0.4≤R9 / (R9+d9)≤1.1.

[0033] Furthermore, a curvature radius R1 of the first side surface of the first lens satisfies the relationship between the entire focal length F of the optical lens set: 0.1≤R1 / F.

[0034] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: 0.3≤F1 / F.

[0035] Furthermore, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: 0.5≤F1 / F2≤1.5.

[0036] Furthermore, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy: 0.5≤|F2 / F3|≤1.8.

[0037] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, a clear aperture D1 of the first side surface of the first lens, and a clear aperture D2 of the image side surface of the first lens satisfy: (R1 / D1) / (R2 / D2)≤0.6.

[0038] Furthermore, a curvature radius R8 of the second side surface of the fourth lens element satisfies the relationship between the entire focal length F of the optical lens set and 0.001≤R8 / F.

[0039] Furthermore, a radius of curvature R10 of the second side surface of the fifth lens element satisfies the relationship between the entire focal length F of the optical lens set and 0.001≤R10 / F.

[0040] Further, the air interval d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, satisfy: 0.05≤d8 / TTL.

[0041] Furthermore, the maximum effective light aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.5≤D11 / H.

[0042] Further, a curvature radius R8 of the second side surface of the fourth lens and a curvature radius R9 of the first side surface of the fifth lens satisfy: R9 / R8≤5.

[0043] Furthermore, the maximum effective light aperture D10 of the second side surface of the fifth lens corresponding to the maximum field angle of the optical lens, the air interval d10 between the fifth lens and the sixth lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 1≤D10*d10 / H.

[0044] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, in order: a first lens having positive optical power; a second lens having positive optical power; a third lens having negative optical power; a fourth lens having negative optical power; a fifth lens having optical power; a sixth lens having optical power; and a curvature radius R8 of a second side surface of the fourth lens satisfies the following relationship with the focal length value F of the entire group of the optical lens: 0.001≤R8 / F.

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

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

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

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

[0049] Furthermore, the first side surface of the third lens is a concave surface, and the second side surface is a concave surface.

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

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

[0052] Furthermore, the fifth lens has positive optical power, the first side surface of the fifth lens is a convex surface, and the second side surface is a concave surface.

[0053] Furthermore, the fifth lens has negative optical power, the first side surface of the fifth lens is a convex surface, and the second side surface is a concave surface.

[0054] Furthermore, the sixth lens has negative optical power, the first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface.

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

[0056] Furthermore, the second lens and the third lens are cemented together to form a doublet lens.

[0057] Furthermore, the optical lens also includes an aperture, and the aperture is arranged between the third lens and the fourth lens.

[0058] Furthermore, the sixth lens is an aspherical lens.

[0059] Furthermore, the sixth lens is configured to be retroflex.

[0060] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤1.8.

[0061] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy: TTL / H / FOV≤0.5.

[0062] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy: TTL / H / θ≤8.

[0063] Furthermore, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens and the maximum light aperture DMAX of the optical lens satisfy: TTL / DMAX≤2.0.

[0064] 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 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≤0.9.

[0065] 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 maximum field angle FOV of the optical lens satisfy: D / H / FOV≤0.15.

[0066] Furthermore, the maximum light clearance diameter 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≤6.8.

[0067] Furthermore, the maximum light clearance 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 entire focal length value F of the optical lens satisfy: D / H / F≤0.1.

[0068] 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: F / H≤4.2.

[0069] Furthermore, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0070] Furthermore, the entire focal length value F of the optical lens, the entrance pupil diameter ENPD of the optical lens and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1.

[0071] Furthermore, the aperture diameter DST of the optical lens and the entire focal length value F of the optical lens satisfy: DST / F≤1.

[0072] Further, a curvature radius R9 of the first side surface of the fifth lens and a center thickness d9 of the fifth lens satisfy: 0.4≤R9 / (R9+d9)≤1.1.

[0073] Furthermore, a curvature radius R1 of the first side surface of the first lens satisfies the relationship between the entire focal length F of the optical lens set: 0.1≤R1 / F.

[0074] Furthermore, the focal length value F1 of the first lens and the focal length value F of the entire optical lens group satisfy: 0.3≤F1 / F.

[0075] Furthermore, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: 0.5≤F1 / F2≤1.5.

[0076] Furthermore, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy: 0.5≤|F2 / F3|≤1.8.

[0077] Furthermore, a curvature radius R1 of the first side surface of the first lens, a curvature radius R2 of the second side surface of the first lens, a clear aperture D1 of the first side surface of the first lens, and a clear aperture D2 of the image side surface of the first lens satisfy: (R1 / D1) / (R2 / D2)≤0.6.

[0078] Furthermore, a radius of curvature R10 of the second side surface of the fifth lens element satisfies the relationship between the entire focal length F of the optical lens set and 0.001≤R10 / F.

[0079] Further, the air interval d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, satisfy: 0.05≤d8 / TTL.

[0080] Furthermore, the maximum effective light aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.5≤D11 / H.

[0081] Further, a curvature radius R8 of the second side surface of the fourth lens and a curvature radius R9 of the first side surface of the fifth lens satisfy: R9 / R8≤5.

[0082] Furthermore, the maximum effective light aperture D10 of the second side surface of the fifth lens corresponding to the maximum field angle of the optical lens, the air interval d10 between the fifth lens and the sixth lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 1≤D10*d10 / H.

[0083] According to another aspect of the present invention, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0084] According to the technical solution of the present invention, the optical lens comprises, from the first side to the second side, a first lens with positive optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with negative optical power, a fifth lens with optical power and a sixth lens with optical power, wherein the first side surface of the first lens is convex, and the second side surface is concave; the first side surface of the second lens is convex; the second side surface of the third lens is concave; the second side surface of the fourth lens is concave; the first side surface of the fifth lens is convex, and the second side surface is concave; the first side surface of the sixth lens is convex, and the second side surface is concave.

[0085] The first lens has positive focal length, which can converge the light passing through it, which is conducive to the smooth transition of light; the first side of the first lens is designed to be convex, which can collect as much light of a large field of view as possible to enter the rear optical system, which is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, and the front port diameter is reduced. In actual use environments such as rainy and snowy weather, it is conducive to the sliding of water droplets and reduces the impact on imaging; the second side of the first lens is concave, which can quickly diverge the large-angle light passing through the first side, which is conducive to the correction of the aberration of the large-angle light by the rear optical system and achieve high resolution.

[0086] The second lens has positive focal length, and the first side surface of the second lens is convex, and the second side surface can be concave or convex. When the second side surface of the second lens is concave, the second lens is a meniscus shaped convex toward the first side, collecting the light entering through the first lens, and the positive focal length is conducive to the convergence of light, so that the light trend transitions smoothly to the rear, reducing the height of the light incident to the rear, and thus reducing the aperture of the rear end lens. The first side surface of the second lens is convex, which has a convergence effect on the light. The positive focal length of the second lens can further reduce aberrations and improve imaging quality; when the second side surface of the second lens is convex, the edge field light is deflected toward the center after passing through the second side surface of the first lens, which is conducive to reducing the diameter of the rear end of the system.

[0087] The third lens has negative focal length, which further diverges the light. The first side of the third lens can be convex or concave, and the second side is concave. When the first side of the third lens is convex and the second side is concave, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the diverged light can smoothly enter the rear, and further make the light transition smoothly; when the first side of the third lens is concave, the negative focal length is matched with a double concave shape, which is conducive to receiving the light from the first side, and can make the light exit smoothly, which is conducive to improving aberrations; it is conducive to subsequent bonding with the second lens, and can smoothly transition the light passing through the second lens to the imaging surface, reducing the total length. On the basis of miniaturization, various aberrations of the optical system are fully corrected to achieve high resolution.

[0088] The fourth lens has negative focal power and has a divergent effect on light, and can disperse the central light and the marginal light of each field of view. The first side surface of the fourth lens can be a concave surface or a convex surface, and the second side surface is a concave surface. When the first side surface of the fourth lens is a concave surface, the shape is double concave, which is conducive to expanding the aperture and increasing the system illumination. At the same time, it is conducive to the correction of the aberration of the marginal light and the central light to achieve high resolution. When the first side surface of the fourth lens is a convex surface, it can converge the light, adjust the light deflection angle, and reduce chromatic aberration.

[0089] The fifth lens has positive or negative optical power, and the first side surface of the fifth lens is convex, and the second side surface is concave. When the fifth lens has positive optical power, it has a convergence effect on light. Reasonable setting of the optical power can not only further deflect the light in the direction of the optical axis, but also reduce the diameter of the rear port; the first side surface of the fifth lens is convex, which can converge the light diverged in front and reduce the incident angle when it reaches the imaging surface; the second side surface is concave, which makes the converged light diverge and reduces the incident angle when the light reaches the imaging surface. When the fifth lens has negative optical power, it has a divergence effect on light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of optical power is conducive to reducing aberrations and improving optical performance.

[0090] The sixth lens has negative power or positive power, and the first side surface of the sixth lens is convex and the second side surface is concave. When the sixth lens has negative power, it has a divergent effect on the light, and the first side surface of the sixth lens is convex and the second side surface is concave, which is conducive to adjusting the optical path difference between the center and the edge, reducing the field curvature, and achieving high resolution. When the sixth lens has positive power, it has a converging effect on the light, so that the light trend transitions smoothly, which is conducive to improving the astigmatism and field curvature of the imaging, and improving the resolution ability of the optical system; at the same time, when the sixth lens adopts an aspherical lens with positive power, it is conducive to correcting various aberrations, improving resolution, balancing the light trend, and reducing CRA.

[0091] The present application adopts six lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small size, high light flux, small FNO, short TTL and small CRA. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] 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:

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

[0094] Figure 2 A schematic structural diagram of an optical lens according to Example 2 of the present invention is shown;

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

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

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

[0098] Figure 6 A schematic diagram showing the structure of an optical lens according to Example 6 of the present invention is shown;

[0099] Figure 7 A schematic diagram showing the structure of an optical lens according to Example 7 of the present invention is shown;

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

[0101] Fig. 9 A schematic diagram showing the structure of an optical lens according to Example 9 of the present invention is shown;

[0102] Fig.10 A schematic diagram showing the structure of an optical lens according to Example 10 of the present invention is shown;

[0103] Fig.11 A schematic diagram showing the structure of an optical lens according to Example 11 of the present invention is shown;

[0104] Fig.12 A schematic structural diagram of an optical lens according to Example 12 of the present invention is shown.

[0105] The above drawings include the following reference numerals:

[0106] 1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; L3, third lens; S4, first side surface of the third lens;

[0107] S5, second side surface of the third lens; STO, aperture; L4, fourth lens; S7, first side surface of the fourth lens; S8, second side surface of the fourth lens; L5, fifth lens; S9, first side surface of the fifth lens; S10, second side surface of the fifth lens; L6, sixth lens; S11, first side surface of the sixth lens; S12, second side surface of the sixth lens; S13, first side surface of the protective glass; S14, second side surface of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 first side is called the first side of the lens, and the surface of each lens close to the second 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 knowledgeable person 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.

[0114] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0115] In an exemplary embodiment, the optical lens provided by the present application can be used as a vehicle-mounted lens. For the vehicle-mounted lens, the left side is the object side and the right side is the image side; the first side is the object side and the second side is the image side. Light from the object side can be imaged on the image side.

[0116] When the optical lens of 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 by 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, and the imaging surface of the optical lens is the image source surface.

[0117] In order to solve the problems of large size, large CRA and poor light transmission capacity of optical lenses in the prior art, the present invention provides an optical lens and an electronic device.

[0118] Embodiment 1

[0119] like Figures 1 to 12 As shown, the optical lens includes, from the first side to the second side, a first lens with positive optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with negative optical power, a fifth lens with optical power and a sixth lens with optical power, wherein the first side surface of the first lens is convex, and the second side surface is concave; the first side surface of the second lens is convex; the second side surface of the third lens is concave; the second side surface of the fourth lens is concave; the first side surface of the fifth lens is convex, and the second side surface is concave; the first side surface of the sixth lens is convex, and the second side surface is concave.

[0120] The first lens has positive focal length, which can converge the light passing through it, which is conducive to the smooth transition of light; the first side of the first lens is designed to be convex, which can collect as much light of a large field of view as possible to enter the rear optical system, which is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, and the front port diameter is reduced. In actual use environments such as rainy and snowy weather, it is conducive to the sliding of water droplets and reduces the impact on imaging; the second side of the first lens is concave, which can quickly diverge the large-angle light passing through the first side, which is conducive to the correction of the aberration of the large-angle light by the rear optical system and achieve high resolution.

[0121] The second lens has positive focal length, and the first side surface of the second lens is convex, and the second side surface can be concave or convex. When the second side surface of the second lens is concave, the second lens is a meniscus shaped convex toward the first side, collecting the light entering through the first lens, and the positive focal length is conducive to the convergence of light, so that the light trend transitions smoothly to the rear, reducing the height of the light incident to the rear, and thus reducing the aperture of the rear end lens. The first side surface of the second lens is convex, which has a convergence effect on the light. The positive focal length of the second lens can further reduce aberrations and improve imaging quality; when the second side surface of the second lens is convex, the edge field light is deflected toward the center after passing through the second side surface of the first lens, which is conducive to reducing the diameter of the rear end of the system.

[0122] The third lens has negative focal length, which further diverges the light. The first side of the third lens can be convex or concave, and the second side is concave. When the first side of the third lens is convex and the second side is concave, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the diverged light can smoothly enter the rear, and further make the light transition smoothly; when the first side of the third lens is concave, the negative focal length is matched with a double concave shape, which is conducive to receiving the light from the first side, and can make the light exit smoothly, which is conducive to improving aberrations; it is conducive to subsequent bonding with the second lens, and can smoothly transition the light passing through the second lens to the imaging surface, reducing the total length. On the basis of miniaturization, various aberrations of the optical system are fully corrected to achieve high resolution.

[0123] The fourth lens has negative focal power and has a divergent effect on light, and can disperse the central light and the marginal light of each field of view. The first side surface of the fourth lens can be a concave surface or a convex surface, and the second side surface is a concave surface. When the first side surface of the fourth lens is a concave surface, the shape is double concave, which is conducive to expanding the aperture and increasing the system illumination. At the same time, it is conducive to the correction of the aberration of the marginal light and the central light to achieve high resolution. When the first side surface of the fourth lens is a convex surface, it can converge the light, adjust the light deflection angle, and reduce chromatic aberration.

[0124] The fifth lens has positive or negative optical power, and the first side surface of the fifth lens is convex, and the second side surface is concave. When the fifth lens has positive optical power, it has a convergence effect on light. Reasonable setting of the optical power can not only further deflect the light in the direction of the optical axis, but also reduce the diameter of the rear port; the first side surface of the fifth lens is convex, which can converge the light diverged in front and reduce the incident angle when it reaches the imaging surface; the second side surface is concave, which makes the converged light diverge and reduces the incident angle when the light reaches the imaging surface. When the fifth lens has negative optical power, it has a divergence effect on light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of optical power is conducive to reducing aberrations and improving optical performance.

[0125] The sixth lens has negative power or positive power, and the first side surface of the sixth lens is convex and the second side surface is concave. When the sixth lens has negative power, it has a divergent effect on the light, and the first side surface of the sixth lens is convex and the second side surface is concave, which is conducive to adjusting the optical path difference between the center and the edge, reducing the field curvature, and achieving high resolution. When the sixth lens has positive power, it has a converging effect on the light, so that the light trend transitions smoothly, which is conducive to improving the astigmatism and field curvature of the imaging, and improving the resolution ability of the optical system; at the same time, when the sixth lens adopts an aspherical lens with positive power, it is conducive to correcting various aberrations, improving resolution, balancing the light trend, and reducing CRA.

[0126] The present application adopts six lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small size, high light flux, small FNO, short TTL and small CRA.

[0127] In this embodiment, the second side surface of the second lens is a concave surface. The second lens is a meniscus shape convex to the first side, collecting the light entering through the first lens. The positive focal length is conducive to the convergence of light, so that the light trend transitions smoothly to the rear, reducing the height of the light incident to the rear, and thus reducing the aperture of the rear lens. The first side surface of the second lens is a convex surface, which has a convergence effect on the light. The positive focal length of the second lens can further reduce aberrations and improve imaging quality.

[0128] In this embodiment, the second side surface of the second lens is a convex surface. The edge field light is deflected toward the center after passing through the second side surface of the first lens, which is beneficial to reducing the diameter of the rear port of the system.

[0129] In this embodiment, the first side surface of the third lens is a convex surface. When the first side surface of the third lens is a convex surface and the second side surface is a concave surface, it is possible to collect as much light of a large field of view as possible to enter the rear optical system, so that the divergent light can smoothly enter the rear, and further make the light trend transition smoothly.

[0130] In this embodiment, the first side surface of the third lens is concave. The negative focal power is matched with a double concave shape, which is conducive to receiving the light from the first side, making the light exit smoothly, and improving aberrations; it is also conducive to subsequent bonding with the second lens, and the light passing through the second lens can be smoothly transitioned to the imaging surface, reducing the total length. On the basis of achieving miniaturization, various aberrations of the optical system are fully corrected to achieve high resolution.

[0131] In this embodiment, the first side surface of the fourth lens is a concave surface. The fourth lens is biconcave, which is beneficial to expand the aperture, increase the system illumination, and correct the aberration of the edge light and the central light to achieve high resolution.

[0132] In this embodiment, the first side surface of the fourth lens is a convex surface, which can converge light, adjust the light deflection angle, and reduce chromatic aberration.

[0133] In this embodiment, the fifth lens has positive focal length, which has a convergence effect on light. Reasonable setting of the focal length can not only further deflect the light toward the optical axis, but also reduce the rear port diameter.

[0134] In this embodiment, the fifth lens has negative optical power, which has a divergent effect on light, so that the subsequent optical system has a larger light receiving surface, and the reasonable distribution of optical power is conducive to reducing aberrations and improving optical performance.

[0135] In this embodiment, the sixth lens has a negative optical power and has a divergent effect on light. The first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface, which is conducive to adjusting the optical path difference between the center and the edge, reducing field curvature, and achieving high resolution.

[0136] In this embodiment, the sixth lens has positive power, which has a convergence effect on light, making the light trend transition smoothly, which is beneficial to improving the astigmatism and field curvature of imaging, and improving the resolution ability of the optical system; at the same time, when the sixth lens adopts a positive power aspheric lens, it is beneficial to correct various aberrations, improve resolution, balance the light trend, and reduce CRA.

[0137] In this embodiment, the second lens and the third lens are glued together to form a double glued lens. The use of the double glued lens can effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images. At the same time, the various aberrations of the optical system can be fully corrected, and the resolution can be improved, and the optical performance such as distortion and CRA can be optimized under the premise of compact structure; the negative lens in the double glued lens has a higher refractive index (relative to the positive lens), so that the light can be effectively and smoothly converged at the end, so that the light can reach the imaging surface smoothly, reducing the overall weight and cost; the setting of the double glued lens can reduce the light loss caused by reflection between lenses; the combination of high and low refractive indices is conducive to the rapid transition of the front light, increasing the aperture and improving the amount of light; and it can reduce the air gap between the two lenses, so that the overall structure of the optical lens is compact, while reducing the tolerance sensitivity problems such as overall eccentricity caused by the lens unit during the assembly process.

[0138] In this embodiment, the optical lens further includes an aperture, which is arranged between the third lens and the fourth lens. This arrangement is conducive to the effective convergence of light entering the optical system, reducing the lens aperture at the front end of the optical system, and reducing the assembly sensitivity of the system.

[0139] In this embodiment, the sixth lens is an aspherical lens. Using an aspherical lens as the sixth lens is beneficial to correcting system aberrations, improving resolution, and especially reducing aberrations in large field of view.

[0140] In this embodiment, the sixth lens is provided with a recurve. Specifically, the first side surface and the second side surface of the sixth lens are both provided with a recurve. By providing the recurve on the first side surface and the second side surface of the sixth lens, the recurve is conducive to balancing the aberration of the central field of view and the edge field of view, thereby improving the resolution.

[0141] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, and the entire group focal length value F of the optical lens satisfy the following: TTL / F≤1.8. When this condition is met, the total length of the optical lens is shorter at the same focal length, which is conducive to miniaturization. Preferably, TTL / F≤1.35.

[0142] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / FOV≤0.5. When this conditional formula is met, when the imaging surface and the field of view are the same, the total length of the optical lens can be effectively limited, which is conducive to miniaturization. Preferably, TTL / H / FOV≤0.3. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0143] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface 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: TTL / H / θ≤8. When this condition is met, the total length of the optical lens is shorter under the same image plane and angle, which is conducive to miniaturization. Preferably, TTL / H / θ≤7.

[0144] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤2.0. The smaller TTL / DMAX is, the more compact and smaller the entire optical system is, which is conducive to miniaturization. Preferably, TTL / DMAX≤1.8.

[0145] 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≤0.9. Satisfying this conditional expression ensures that the front port diameter is small and miniaturization can be achieved. Preferably, (F*θ) / D≤0.75.

[0146] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.15. Under the condition of a fixed angle, the front port diameter is guaranteed to be small, and miniaturization can be achieved. Preferably, D / H / FOV≤0.09. The maximum field of view FOV is associated with the image height H, which is the field of view angle corresponding to the image height.

[0147] 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≤6.8. Under the condition of a fixed angle, the front port diameter is kept small, and miniaturization can be achieved. Preferably, D / H / θ≤5.4.

[0148] 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 focal length value F of the entire set of the optical lens satisfy: D / H / F≤0.1. Under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D / H / F≤0.08.

[0149] In this embodiment, the focal length value F of the entire optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≤4.2. When the imaging surface is fixed, reasonable focal length distribution is conducive to improving the resolution capability. Preferably, F / H≤3.2.

[0150] 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≤2. A small FNO is conducive to increasing the amount of light passing, and a large entrance pupil diameter is conducive to improving relative illumination. Preferably, F / ENPD≤1.5.

[0151] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1. Under the premise of meeting the high light throughput, the small aperture is ensured to realize the miniaturization of the optical lens. Preferably, F / ENPD / D≤0.07.

[0152] In this embodiment, the aperture diameter DST of the optical lens satisfies the whole focal length value F of the optical lens: DST / F≤1. The larger the ratio of the aperture diameter to the effective focal length, the larger the aperture of the optical lens is, which is conducive to increasing the amount of light passing. Preferably, DST / F≤0.8.

[0153] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the central thickness d9 of the fifth lens satisfy: 0.4≤R9 / (R9+d9)≤1.1. The special lens shape is close to concentric circles, so that there is an optical path difference between the peripheral light and the central light, and the central light is diverged and enters the rear optical system, which is conducive to high resolution. Preferably, 0.5≤R9 / (R9+d9)≤0.9.

[0154] In this embodiment, the radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the focal length F of the entire optical lens set: 0.1≤R1 / F. The first side surface of the first lens is a convex surface, and the radius of curvature is small, which is conducive to shrinking the front light, so that the height at which the light enters the second lens is reduced, the front port diameter is reduced, and miniaturization is achieved. Preferably, 0.3≤R1 / F.

[0155] 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: 0.3≤F1 / F. By rationally allocating the focal length of the first lens, it is helpful to balance various aberrations and improve the resolution. Preferably, 0.5≤F1 / F.

[0156] In this embodiment, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: 0.5≤F1 / F2≤1.5. The similar focal lengths of the first lens and the second lens not only help more collected light to enter the rear system and increase the luminous flux, but also make the light transition smoothly and improve the resolution. Preferably, 0.7≤F1 / F2≤1.2.

[0157] In this embodiment, the focal length value F2 of the second lens and the focal length value F3 of the third lens satisfy: 0.5≤|F2 / F3|≤1.8. Reasonably control the light trend between the second lens and the third lens, reduce the aberration caused by the large angle light entering through the second lens, and make the overall structure more compact, which is conducive to miniaturization. Preferably, 0.7≤|F2 / F3|≤1.6.

[0158] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the clear aperture D1 of the first side surface of the first lens, and the clear aperture D2 of the image side surface of the first lens satisfy: (R1 / D1) / (R2 / D2)≤0.6. The radius of curvature and the aperture of the two surfaces of the first lens are limited. When the surface of the first lens is convex and concave, it is matched with positive focal length. The greater the difference in the R values ​​of the two surfaces and the closer the aperture values ​​of the two surfaces are, the more conducive it is to converge light, suppress light, and make the front aperture of the optical lens smaller. Preferably, (R1 / D1) / (R2 / D2)≤0.4.

[0159] In this embodiment, the radius of curvature R8 of the second side surface of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens set: 0.001≤R8 / F. The second side surface of the fourth lens is set as a concave surface, which is conducive to the divergence of light, increases the height reaching the imaging surface, and achieves a large aperture effect. Preferably, 0.16≤R8 / F.

[0160] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens set: 0.001≤R10 / F. The image side surface of the fifth lens is set as a concave surface, so that the light tends to diverge, reducing the incident angle when the light reaches the imaging surface, and achieving a small CRA. Preferably, 0.3≤R10 / F.

[0161] In this embodiment, the air interval d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 0.05≤d8 / TTL. Reasonable setting of the distance between the fourth lens and the fifth lens can give full play to the light divergence tendency of the concave surface, increase the height reaching the imaging surface, and achieve the effect of a large aperture. Preferably, 0.08≤d8 / TTL.

[0162] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D11 / H. In the case of the same imaging surface and the same image height, the last lens has a large aperture, which is conducive to achieving a small CRA. Preferably, 0.8≤D11 / H.

[0163] In this embodiment, the curvature radius R8 of the second side surface of the fourth lens and the curvature radius R9 of the first side surface of the fifth lens satisfy: R9 / R8≤5. Meeting this conditional expression is conducive to converging the forward divergent light, reducing the incident angle of the light when it reaches the image plane, and is conducive to achieving a small CRA. Preferably, R9 / R8≤3.

[0164] In this embodiment, the maximum effective aperture D10 of the second side surface of the fifth lens corresponding to the maximum field angle of the optical lens, the air interval d10 between the fifth lens and the sixth lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1≤D10*d10 / H. Under the same imaging plane and the same image height, a reasonable setting of the distance between the fifth lens and the sixth lens is conducive to the parallel emission of the main light to the imaging plane, and further conducive to achieving a small CRA. Preferably, 1.7≤D10*d10 / H.

[0165] Embodiment 2

[0166] like Figures 1 to 12 As shown, the optical lens includes, from the first side to the second side, a first lens with positive focal power; a second lens with positive focal power; a third lens with negative focal power; a fourth lens with negative focal power; a fifth lens with focal power; a sixth lens with focal power; the curvature radius R8 of the second side surface of the fourth lens and the focal length value F of the entire group of the optical lens satisfy: 0.001≤R8 / F. The second side surface of the fourth lens is set as a concave surface, which is conducive to the divergence trend of light, so that the height reaching the imaging surface is increased, and the effect of a large aperture is achieved. Preferably, 0.16≤R8 / F.

[0167] In this embodiment, the first side surface of the first lens is convex, and the second side surface is concave. The first lens has positive focal power, and has a convergence effect on the light passing through it, which is conducive to the smooth transition of the light; the first side surface of the first lens is designed to be convex, which can collect as much light of a large field of view as possible to enter the rear optical system, which is conducive to shrinking the front light, so that the height of the light entering the second lens is reduced, and the front port diameter is reduced. And in actual use environments such as rainy and snowy weather, it is conducive to the sliding of water droplets and reduces the impact on imaging; the second side surface of the first lens is concave, which can quickly diverge the large-angle light passing through the first side, which is conducive to the correction of the aberration of the large-angle light by the rear optical system, and achieve high resolution.

[0168] In this embodiment, the first side surface of the second lens is convex, and the second side surface is concave. The second lens is a meniscus shaped convex toward the first side, collecting the light entering through the first lens, and the positive focal length is conducive to the convergence of light, so that the light trend smoothly transitions to the rear, reducing the height of the light incident to the rear, thereby reducing the aperture of the rear lens. The first side surface of the second lens is convex, which has a convergence effect on the light, and the positive focal length of the second lens can further reduce aberrations and improve imaging quality.

[0169] In this embodiment, the first side surface of the second lens is a convex surface, and the second side surface is a convex surface. The first side surface of the second lens is a convex surface, which has a convergence effect on light, and the positive optical power of the second lens can further reduce aberrations and improve imaging quality; the second side surface is a convex surface, and the edge field light is deflected toward the center after passing through the second side surface of the first lens, which is conducive to reducing the diameter of the rear port of the system.

[0170] In this embodiment, the first side surface of the third lens is convex, and the second side surface is concave. The third lens has negative optical power, which further diverges the light. When the first side surface of the third lens is convex and the second side surface is concave, it can collect as much light of a large field of view as possible to enter the rear optical system, so that the divergent light can smoothly enter the rear, and further make the light trend smoothly transition.

[0171] In this embodiment, the first side surface of the third lens is concave, and the second side surface is concave. The negative focal length is matched with a double concave shape, which is conducive to receiving the light from the first side, making the light exit smoothly, and improving the aberration; it is also conducive to the subsequent bonding with the second lens, and the light passing through the second lens can be smoothly transitioned to the imaging surface, reducing the total length. On the basis of achieving miniaturization, various aberrations of the optical system are fully corrected to achieve high resolution.

[0172] In this embodiment, the first side surface of the fourth lens is concave, and the second side surface is concave. With negative optical power, it has a divergent effect on light, and can disperse the central light and edge light of each field of view. The shape of the fourth lens is double concave, which is conducive to expanding the aperture, increasing the system illumination, and at the same time, it is conducive to the correction of the aberration of the edge light and the central light to achieve high resolution.

[0173] In this embodiment, the first side surface of the fourth lens is a convex surface, and the second side surface is a concave surface. This arrangement can converge light, adjust the light deflection angle, and reduce chromatic aberration.

[0174] In this embodiment, the fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface is concave. Positive optical power has a convergence effect on light, and reasonable setting of the optical power can not only further deflect the light in the direction of the optical axis, but also reduce the diameter of the rear port; the first side surface of the fifth lens is convex, which can converge the light diverged in front and reduce the incident angle when reaching the imaging surface; the second side surface is concave, which makes the converged light diverge and reduces the incident angle when the light reaches the imaging surface.

[0175] In this embodiment, the fifth lens has negative optical power, the first side surface of the fifth lens is convex, and the second side surface is concave. Negative optical power has a divergent effect on light, so that the subsequent optical system has a larger light receiving surface. Reasonable distribution of optical power is conducive to reducing aberrations and improving optical performance. The first side surface of the fifth lens is convex, which can converge the divergent light in front and reduce the incident angle when reaching the imaging surface; the second side surface is concave, which makes the converged light divergent and reduces the incident angle when the light reaches the imaging surface.

[0176] In this embodiment, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface is concave. Negative optical power has a divergent effect on light, the first side surface of the sixth lens is convex, and the second side surface is concave, which is conducive to adjusting the optical path difference between the center and the edge, reducing field curvature, and achieving high resolution.

[0177] In this embodiment, the sixth lens has positive power, the first side surface of the sixth lens is convex, and the second side surface is concave. The positive power has a convergence effect on light, so that the light trend transitions smoothly, which is beneficial to improving the astigmatism and field curvature of imaging and improving the resolution ability of the optical system; at the same time, when the sixth lens adopts a positive power aspheric lens, it is beneficial to correct various aberrations, improve resolution, balance the light trend, and reduce CRA.

[0178] The present application adopts six lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect of small size, high light flux, small FNO, short TTL and small CRA.

[0179] In this embodiment, the second lens and the third lens are glued together to form a double glued lens. The use of the double glued lens can effectively eliminate the influence of ghost images on the optical lens, so that the optical lens can ensure a higher resolution on the basis of eliminating ghost images. At the same time, the various aberrations of the optical system can be fully corrected, and the resolution can be improved, and the optical performance such as distortion and CRA can be optimized under the premise of compact structure; the negative lens in the double glued lens has a higher refractive index (relative to the positive lens), so that the light can be effectively and smoothly converged at the end, so that the light can reach the imaging surface smoothly, reducing the overall weight and cost; the setting of the double glued lens can reduce the light loss caused by reflection between lenses; the combination of high and low refractive indices is conducive to the rapid transition of the front light, increasing the aperture and improving the amount of light; and it can reduce the air gap between the two lenses, so that the overall structure of the optical lens is compact, while reducing the tolerance sensitivity problems such as overall eccentricity caused by the lens unit during the assembly process.

[0180] In this embodiment, the optical lens further includes an aperture, which is arranged between the third lens and the fourth lens. This arrangement is conducive to the effective convergence of light entering the optical system, reducing the lens aperture at the front end of the optical system, and reducing the assembly sensitivity of the system.

[0181] In this embodiment, the sixth lens is an aspherical lens. Using an aspherical lens as the sixth lens is beneficial to correcting system aberrations, improving resolution, and especially reducing aberrations in large field of view.

[0182] In this embodiment, the sixth lens is provided with a recurve. Specifically, the first side surface and the second side surface of the sixth lens are both provided with a recurve. By providing the recurve on the first side surface and the second side surface of the sixth lens, the recurve is conducive to balancing the aberration of the central field of view and the edge field of view, thereby improving the resolution.

[0183] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, and the entire group focal length value F of the optical lens satisfy the following: TTL / F≤1.8. When this condition is met, the total length of the optical lens is shorter at the same focal length, which is conducive to miniaturization. Preferably, TTL / F≤1.35.

[0184] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: TTL / H / FOV≤0.5. When this conditional formula is met, when the imaging surface and the field of view are the same, the total length of the optical lens can be effectively limited, which is conducive to miniaturization. Preferably, TTL / H / FOV≤0.3. The maximum field of view FOV is associated with the image height H, which is the field of view corresponding to the image height.

[0185] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface 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: TTL / H / θ≤8. When this condition is met, the total length of the optical lens is shorter under the same image plane and angle, which is conducive to miniaturization. Preferably, TTL / H / θ≤7.

[0186] In this embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens of the optical lens to the imaging surface of the optical lens, and the maximum aperture DMAX of the optical lens satisfy: TTL / DMAX≤2.0. The smaller TTL / DMAX is, the more compact and smaller the entire optical system is, which is conducive to miniaturization. Preferably, TTL / DMAX≤1.8.

[0187] 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≤0.9. Satisfying this conditional expression ensures that the front port diameter is small and miniaturization can be achieved. Preferably, (F*θ) / D≤0.75.

[0188] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: D / H / FOV≤0.15. Under the condition of a fixed angle, the front port diameter is guaranteed to be small, and miniaturization can be achieved. Preferably, D / H / FOV≤0.09. The maximum field of view FOV is associated with the image height H, which is the field of view angle corresponding to the image height.

[0189] 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≤6.8. Under the condition of a fixed angle, the front port diameter is kept small, and miniaturization can be achieved. Preferably, D / H / θ≤5.4.

[0190] 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 focal length value F of the entire set of the optical lens satisfy: D / H / F≤0.1. Under the condition of a fixed focal length, the optical lens can be provided with the characteristics of a large target surface and a small aperture. Preferably, D / H / F≤0.08.

[0191] In this embodiment, the focal length value F of the entire optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: F / H≤4.2. When the imaging surface is fixed, reasonable focal length distribution is conducive to improving the resolution capability. Preferably, F / H≤3.2.

[0192] 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≤2. A small FNO is conducive to increasing the amount of light passing, and a large entrance pupil diameter is conducive to improving relative illumination. Preferably, F / ENPD≤1.5.

[0193] In this embodiment, the focal length value F of the entire optical lens, the entrance pupil diameter ENPD of the optical lens, and the maximum aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: F / ENPD / D≤0.1. Under the premise of meeting the high light throughput, the small aperture is ensured to realize the miniaturization of the optical lens. Preferably, F / ENPD / D≤0.07.

[0194] In this embodiment, the aperture diameter DST of the optical lens satisfies the whole focal length value F of the optical lens: DST / F≤1. The larger the ratio of the aperture diameter to the effective focal length, the larger the aperture of the optical lens is, which is conducive to increasing the amount of light passing. Preferably, DST / F≤0.8.

[0195] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the central thickness d9 of the fifth lens satisfy: 0.4≤R9 / (R9+d9)≤1.1. The special lens shape is close to concentric circles, so that there is an optical path difference between the peripheral light and the central light, and the central light is diverged and enters the rear optical system, which is conducive to high resolution. Preferably, 0.5≤R9 / (R9+d9)≤0.9.

[0196] In this embodiment, the radius of curvature R1 of the first side surface of the first lens satisfies the following relationship with the focal length F of the entire optical lens set: 0.1≤R1 / F. The first side surface of the first lens is a convex surface, and the radius of curvature is small, which is conducive to shrinking the front light, so that the height at which the light enters the second lens is reduced, the front port diameter is reduced, and miniaturization is achieved. Preferably, 0.3≤R1 / F.

[0197] 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: 0.3≤F1 / F. By rationally allocating the focal length of the first lens, it is helpful to balance various aberrations and improve the resolution. Preferably, 0.5≤F1 / F.

[0198] In this embodiment, the focal length value F1 of the first lens and the focal length value F2 of the second lens satisfy: 0.5≤F1 / F2≤1.5. The similar focal lengths of the first lens and the second lens not only help more collected light to enter the rear system and increase the luminous flux, but also make the light transition smoothly and improve the resolution. Preferably, 0.7≤F1 / F2≤1.2.

[0199] In this embodiment, the focal length value F2 of the second lens and the focal length value F3 of the third lens satisfy: 0.5≤|F2 / F3|≤1.8. Reasonably control the light trend between the second lens and the third lens, reduce the aberration caused by the large angle light entering through the second lens, and make the overall structure more compact, which is conducive to miniaturization. Preferably, 0.7≤|F2 / F3|≤1.6.

[0200] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the clear aperture D1 of the first side surface of the first lens, and the clear aperture D2 of the image side surface of the first lens satisfy: (R1 / D1) / (R2 / D2)≤0.6. The radius of curvature and the aperture of the two surfaces of the first lens are limited. When the surface of the first lens is convex and concave, it is matched with positive focal length. The greater the difference in the R values ​​of the two surfaces and the closer the aperture values ​​of the two surfaces are, the more conducive it is to converge light, suppress light, and make the front aperture of the optical lens smaller. Preferably, (R1 / D1) / (R2 / D2)≤0.4.

[0201] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens set: 0.001≤R10 / F. The image side surface of the fifth lens is set as a concave surface, so that the light tends to diverge, reducing the incident angle when the light reaches the imaging surface, and achieving a small CRA. Preferably, 0.3≤R10 / F.

[0202] In this embodiment, the air interval d8 between the fourth lens and the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 0.05≤d8 / TTL. Reasonable setting of the distance between the fourth lens and the fifth lens can give full play to the light divergence tendency of the concave surface, increase the height reaching the imaging surface, and achieve the effect of a large aperture. Preferably, 0.08≤d8 / TTL.

[0203] In this embodiment, the maximum effective aperture D11 of the first side of the sixth lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤D11 / H. In the case of the same imaging surface and the same image height, the last lens has a large aperture, which is conducive to achieving a small CRA. Preferably, 0.8≤D11 / H.

[0204] In this embodiment, the curvature radius R8 of the second side surface of the fourth lens and the curvature radius R9 of the first side surface of the fifth lens satisfy: R9 / R8≤5. Meeting this conditional expression is conducive to converging the forward divergent light, reducing the incident angle of the light when it reaches the image plane, and is conducive to achieving a small CRA. Preferably, R9 / R8≤3.

[0205] In this embodiment, the maximum effective aperture D10 of the second side surface of the fifth lens corresponding to the maximum field angle of the optical lens, the air interval d10 between the fifth lens and the sixth lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1≤D10*d10 / H. Under the same imaging plane and the same image height, a reasonable setting of the distance between the fifth lens and the sixth lens is conducive to the parallel emission of the main light to the imaging plane, and further conducive to achieving a small CRA. Preferably, 1.7≤D10*d10 / H.

[0206] Optionally, the optical lens may further include a color filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0207] The optical lens in the present application may use multiple lenses, such as the six lenses mentioned above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. The characteristics of aspherical lenses are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberrations and improving astigmatism aberrations. After using aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0208] In an exemplary embodiment, the present solution does not limit the plastic and glass of the lens. If the focus is on temperature performance, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens can 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 the lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the optical lens. For example, the temperature range of the optical lens with an all-glass design is wider, 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 can all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the sixth lens in the optical lens can also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the sixth lens in the optical lens can also be made of a combination of plastic and glass.

[0209] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element that converts 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.

[0210] 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.

[0211] 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.

[0212] It should be noted that any one of the following examples 1 to 12 is applicable to all embodiments of the present application.

[0213] Example 1

[0214] like Figure 1 The figure shows a schematic diagram of the optical lens structure of Example 1.

[0215] like Figure 1 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0216] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0217] In this example, the total effective focal length F of the optical lens is 34.664 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.870 mm.

[0218] Table 1 shows a basic structural parameter table of the optical lens of Example 1, wherein the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0219] Surf Radius Thickness Nd Vd 1 23.705 6.549 2.00 25.43 2 117.794 0.100 3 19.677 4.841 1.57 71.30 4 -1785.682 1.213 1.92 18.90 5 25.293 1.903 STO Infinity 0.313 7 -2385.045 0.817 1.49 70.44 8 12.178 10.880 9 16.636 6.825 2.00 25.43 10 22.343 3.643 11 18.612 4.357 1.59 61.15 12 29.938 2.494 13 Infinity 0.799 1.52 64.20 14 Infinity 0.135 IMA / /

[0220] Table 1

[0221] In Example 1, the surface shape of the aspheric lens can be defined by but not limited to the following aspheric formula:

[0222]

[0223] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; A, B, C, D, and E are all high-order coefficients. Table 2 below shows the cone coefficient k and the high-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S11 and S12 in Example 1.

[0224] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -2.956 -9.5438E-05 3.8957E-07 -4.5381E-08 2.9552E-10 3.3536E-12 -2.9526E-14 12 9.691 -1.4704E-04 -2.6055E-06 2.6234E-08 -2.2754E-09 4.8555E-11 -3.0141E-13

[0225] Table 2

[0226] Example 2

[0227] like Figure 2 FIG. 1 is a schematic diagram of the optical lens structure of Example 2. In this example and the following examples, for the sake of brevity, some descriptions similar to Example 1 will be omitted.

[0228] like Figure 2 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, 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 concave. The second lens L2 has positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0230] In this example, the total effective focal length F of the optical lens is 34.872 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 45.136 mm.

[0231] Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0232] Surf Radius Thickness Nd Vd 1 23.847 6.588 2.00 25.43 2 118.502 0.101 3 19.795 4.870 1.57 71.30 4 -1796.407 1.221 1.92 18.90 5 25.445 1.915 STO Infinity 0.315 7 -2399.370 0.822 1.49 70.44 8 12.251 10.946 9 16.736 6.866 2.00 25.43 10 22.477 3.665 11 18.724 4.384 1.59 61.15 12 30.117 2.509 13 Infinity 0.804 1.52 64.20 14 Infinity 0.133 IMA / /

[0233] Table 3

[0234] Table 4 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 2.

[0235] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -2.956 -8.6753E-05 3.8783E-07 -4.3712E-08 2.8002E-10 3.1398E-12 -2.7315E-14 12 9.691 -1.3450E-04 -2.9112E-06 2.5446E-08 -2.1560E-09 4.5460E-11 -2.7884E-13

[0236] Table 4

[0237] Example 3

[0238] like Figure 3 The figure shows a schematic diagram of the optical lens structure of Example 3.

[0239] like Figure 3 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0240] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0241] In this example, the total effective focal length F of the optical lens is 34.650 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.888 mm.

[0242] Table 5 shows the basic structural parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0243] Surf Radius Thickness Nd Vd 1 23.801 6.523 2.00 25.43 2 118.979 0.100 3 19.803 4.842 1.57 71.30 4 1761.640 1.213 1.92 18.90 5 25.634 1.895 STO Infinity 0.303 7 -730.437 0.806 1.49 70.44 8 12.286 10.943 9 16.598 6.873 2.00 25.43 10 22.383 3.710 11 19.283 4.446 1.59 61.15 12 29.543 2.382 13 Infinity 0.800 1.52 64.20 14 Infinity 0.052 IMA / /

[0244] Table 5

[0245] Table 6 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 3.

[0246] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -3.105 -1.0509E-04 2.2962E-07 -4.5860E-08 3.1091E-10 3.7974E-12 -3.1302E-14 12 9.478 -1.6004E-04 -2.7761E-06 2.6569E-08 -2.2499E-09 4.8136E-11 -2.9391E-13

[0247] Table 6

[0248] Example 4

[0249] like Figure 4 The figure shows a schematic diagram of the optical lens structure of Example 4.

[0250] like Figure 4 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0251] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0252] In this example, the total effective focal length F of the optical lens is 34.621 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.835 mm.

[0253] Table 7 shows the basic structural parameter table of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0254]

[0255]

[0256] Table 7

[0257] Table 8 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 4.

[0258] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -3.257 -1.1515E-04 2.5311E-07 -4.5813E-08 3.1085E-10 3.7923E-12 -3.1456E-14 12 9.487 -1.8325E-04 -2.7829E-06 2.6407E-08 -2.2508E-09 4.8141E-11 -2.9366E-13

[0259] Table 8

[0260] Example 5

[0261] like Figure 5 The figure shows a schematic diagram of the optical lens structure of Example 5.

[0262] like Figure 5 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0263] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0264] In this example, the total effective focal length F of the optical lens is 34.382 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.822 mm.

[0265] Table 9 shows the basic structural parameter table of the optical lens of Example 5, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0266]

[0267]

[0268] Table 9

[0269] Table 10 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 5.

[0270] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -8.431 -1.5544E-04 -1.2485E-07 -4.4755E-08 3.6314E-10 3.9102E-12 -4.1808E-14 12 22.062 -1.9139E-04 -3.3837E-06 4.9696E-08 -2.3828E-09 4.9390E-11 -3.2201E-13

[0271] Table 10

[0272] Example 6

[0273] like Figure 6 Shown is a schematic diagram of the optical lens structure of Example 6.

[0274] like Figure 6 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0275] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0276] In this example, the total effective focal length F of the optical lens is 34.380 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.813 mm.

[0277] Table 11 shows the basic structural parameter table of the optical lens of Example 6, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0278]

[0279] Table 11

[0280] Table 12 below shows the cone coefficient k and the coefficients of the higher-order terms A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 6.

[0281]

[0282] Example 7

[0283] like Figure 7 The figure shows the schematic diagram of the optical lens structure of Example 7.

[0284] like Figure 7 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0285] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0286] In this example, the total effective focal length F of the optical lens is 34.502 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.629 mm.

[0287] Table 13 shows the basic structural parameter table of the optical lens of Example 7, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0288]

[0289] Table 13

[0290] Table 14 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 7.

[0291]

[0292] Example 8

[0293] like Figure 8 Shown is a schematic diagram of the optical lens structure of Example 8.

[0294] like Figure 8 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0295] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0296] In this example, the total effective focal length F of the optical lens is 34.414 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.583 mm.

[0297] Table 15 shows the basic structural parameter table of the optical lens of Example 8, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0298] Surf Radius Thickness Nd Vd 1 24.023 6.104 2.00 25.43 2 117.181 0.100 3 20.017 4.592 1.57 71.30 4 1696.000 1.216 1.92 18.90 5 25.577 2.001 STO Infinity 0.509 7 2152.308 0.820 1.49 70.44 8 13.184 10.287 9 16.534 7.048 2.00 25.43 10 21.662 3.537 11 23.975 5.026 1.59 61.15 12 37.772 2.458 13 Infinity 0.800 1.52 64.20 14 Infinity 0.086 IMA / /

[0299] Table 15

[0300] Table 16 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 8.

[0301] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 -9.750 -1.3025E-04 -7.1570E-08 -4.6389E-08 3.8874E-10 3.9534E-12 -4.471E-14 12 16.229 -1.9482E-04 -3.0853E-06 4.2829E-08 -2.2800E-09 4.7751E-11 -3.0684E-13

[0302] Table 16

[0303] Example 9

[0304] like Fig. 9 The figure shows a schematic diagram of the optical lens structure of Example 9.

[0305] like Fig. 9 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0306] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0307] In this example, the total effective focal length F of the optical lens is 33.753 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 41.410 mm.

[0308] Table 17 shows the basic structural parameter table of the optical lens of Example 9, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0309] Surf Radius Thickness Nd Vd 1 22.620 5.512 2.00 25.43 2 109.618 0.100 3 18.978 4.759 1.57 71.30 4 961.694 0.803 1.92 18.90 5 32.478 1.545 STO Infinity 0.062 7 343.296 0.810 1.49 70.44 8 11.364 5.539 9 23.091 6.654 2.00 25.43 10 19.073 3.354 11 18.830 8.969 1.59 61.15 12 163.203 2.392 13 Infinity 0.800 1.52 64.20 14 Infinity 0.111 IMA / /

[0310] Table 17

[0311] Table 18 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 9.

[0312] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 0.209 -1.0177E-04 2.2582E-07 -3.8889E-08 1.1126E-09 -2.3014E-11 1.5441E-13 12 199.400 1.0523E-04 -8.2302E-06 1.8748E-07 -3.3396E-09 2.2949E-11 -2.1825E-14

[0313] Table 18

[0314] Example 10

[0315] like Fig.10 The figure shows a schematic diagram of the optical lens structure of Example 10.

[0316] like Fig.10 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0317] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has negative power, the first side surface S4 of the third lens is convex, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative 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 negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0318] In this example, the total effective focal length F of the optical lens is 33.763 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 41.419 mm.

[0319] Table 19 shows the basic structural parameter table of the optical lens of Example 10, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0320] Surf Radius Thickness Nd Vd 1 22.620 5.512 2.00 25.43 2 109.616 0.100 3 18.978 4.759 1.57 71.30 4 961.009 0.800 1.92 18.90 5 32.477 1.525 STO Infinity 0.082 7 343.228 0.800 1.49 70.44 8 11.364 5.538 9 23.091 6.654 2.00 25.43 10 19.073 3.355 11 18.833 8.970 1.59 61.15 12 163.345 2.391 13 Infinity 0.800 1.52 64.20 14 Infinity 0.133 IMA / /

[0321] Table 19

[0322] Table 20 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 10.

[0323] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 0.207 -1.0070E-04 2.2574E-07 -3.8896E-08 1.1126E-09 -2.3014E-11 1.5435E-13 12 197.770 1.0511E-04 -8.2316E-06 1.8750E-07 -3.3397E-09 2.2947E-11 -2.1799E-14

[0324] Table 20

[0325] Example 11

[0326] like Fig.11 The figure shows a schematic diagram of the optical lens structure of Example 11.

[0327] like Fig.11 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0328] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0329] In this example, the total effective focal length F of the optical lens is 34.241 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 44.985 mm.

[0330] Table 21 shows the basic structural parameter table of the optical lens of Example 11, wherein the units of the radius of curvature and thickness / distance are both millimeters (mm).

[0331]

[0332]

[0333] Table 21

[0334] Table 22 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspheric lens surfaces S11 and S12 in Example 11.

[0335] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 22.259 -4.8881E-04 5.3505E-06 -6.1513E-08 2.7178E-10 7.3007E-12 -8.9973E-14 12 -7.785 -4.4443E-04 5.3569E-06 2.2243E-08 -3.6881E-09 7.2830E-11 -4.6781E-13

[0336] Table 22

[0337] Example 12

[0338] like Fig.12 , which is a schematic diagram of the optical lens structure of Example 12.

[0339] like Fig.12 As shown, the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the protective glass, a second side surface S14 of the protective glass, and an imaging surface IMA.

[0340] 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 positive power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S4 of the third lens is concave, and the second side surface S5 of the third lens is concave. The fourth lens L4 has negative power, the first side surface S7 of the fourth lens is concave, 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 negative 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 light from the first side passes through the surfaces S1 to S14 in sequence and is finally imaged on the imaging surface IMA. Since the second lens L2 and the third lens L3 are cemented to form a doublet lens, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface.

[0341] In this example, the total effective focal length F of the optical lens is 34.249 mm, the maximum field of view FOV of the optical lens is 25.200°, and the total length TTL of the optical lens is 45.023 mm.

[0342] Table 23 shows the basic structural parameter table of the optical lens of Example 12, wherein the units of the radius of curvature Radius and the thickness / distance are both millimeters (mm).

[0343]

[0344]

[0345] Table 23

[0346] Table 24 below shows the cone coefficient k and the higher-order coefficients A, B, C, D, E, and F that can be used for the aspherical lens surfaces S11 and S12 in Example 12.

[0347] Higher order terms / 4 6 8 10 12 14 Surf K A B C D E F 11 22.990 -4.7992E-04 5.2292E-06 -6.1747E-08 2.7056E-10 7.2707E-12 -9.0544E-14 12 -7.068 -4.5516E-04 5.3677E-06 2.2251E-08 -3.6884E-09 7.2740E-11 -4.6868E-13

[0348] Table 24 In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 25.

[0349] Conditional / Example 1 2 3 4 5 6 7 8 9 10 11 12 TTL / F 1.294 1.294 1.295 1.295 1.304 1.303 1.294 1.295 1.227 1.227 1.314 1.315 TTL / H / FOV 0.115 0.116 0.115 0.115 0.115 0.114 0.115 0.114 0.107 0.107 0.115 0.116 TTL / H / θ 6.586 6.650 6.573 6.593 6.584 6.551 6.564 6.543 6.134 6.139 6.608 6.629 TTL / DMAX 1.537 1.546 1.525 1.523 1.535 1.535 1.528 1.527 1.418 1.418 1.541 1.542 (F*θ) / D 0.522 0.525 0.518 0.517 0.518 0.518 0.520 0.518 0.508 0.509 0.516 0.516 D / H / FOV 0.075 0.075 0.075 0.076 0.075 0.074 0.075 0.075 0.075 0.076 0.075 0.075 D / H / θ 4.286 4.302 4.311 4.329 4.289 4.268 4.295 4.286 4.326 4.328 4.289 4.300 D / H / F 0.054 0.054 0.055 0.055 0.055 0.055 0.055 0.055 0.056 0.056 0.055 0.055 F / H 2.238 2.260 2.232 2.239 2.221 2.210 2.232 2.221 2.199 2.201 2.212 2.218 F / ENPD 1.200 1.200 1.200 1.200 1.200 1.200 1.200 1.200 1.200 1.200 1.200 1.200 F / ENPD / D 0.041 0.041 0.041 0.041 0.041 0.041 0.041 0.041 0.041 0.041 0.041 0.041 DST / F 0.538 0.538 0.538 0.538 0.538 0.538 0.558 0.557 0.571 0.572 0.621 0.621 R9 / (R9+d9) 0.709 0.709 0.707 0.707 0.693 0.693 0.700 0.701 0.776 0.776 0.736 0.736 R1 / F 0.684 0.684 0.687 0.688 0.696 0.696 R2 / F 0.698 0.670 0.670 0.781 0.782 F1 / F 0.868 0.868 0.871 0.872 0.874 0.874 F2 / F 0.892 0.859 0.859 0.987 0.987 F1 / F2 0.861 0.861 0.841 0.843 0.892 0.890 0.844 0.846 0.836 0.836 0.809 0.810 |F2 / F3| 1.215 1.215 1.196 1.195 1.356 1.355 1.210 1.211 0.894 0.894 1.005 1.005 (R1 / D1) / (R2 / D2) 0.189 0.189 0.188 0.188 0.180 0.180 0.196 0.195 0.200 0.200 0.181 0.180 R8 / F 0.351 0.351 0.355 0.355 0.403 0.403 0.382 0.383 0.337 0.337 0.410 0.410 R10 / F 0.645 0.645 0.646 0.647 0.629 0.629 0.629 0.629 0.565 0.565 17.720 18.406 d8 / TTL 0.242 0.243 0.244 0.243 0.206 0.206 0.233 0.231 0.134 0.134 0.215 0.215 D11 / H 1.131 1.134 1.129 1.133 1.078 1.073 1.100 1.098 1.032 1.034 1.071 1.073 R9 / R8 1.366 1.366 1.351 1.351 1.179 1.179 1.251 1.254 2.032 2.032 1.589 1.590 D10*d10 / H 4.292 4.320 4.388 4.419 3.778 3.759 4.029 4.019 3.327 3.333 5.464 5.478

[0350] Table 25

[0351] Table 26 gives the effective focal length F of the optical lenses of Examples 1 to 12, the effective focal length F1 to F6 of each lens, etc. (unit: mm).

[0352]

[0353]

[0354] Table 26

[0355] 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.

[0356] 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.

[0357] 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.

[0358] 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: From the first side to the second side, it includes: A first lens having positive optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; a second lens having positive optical power, wherein the first side surface of the second lens is a convex surface; a third lens having negative optical power, wherein the second side surface of the third lens is a concave surface; a fourth lens having negative optical power, wherein the second side surface of the fourth lens is a concave surface; a fifth lens having optical power, wherein the first side surface of the fifth lens is convex and the second side surface is concave; A sixth lens having optical power, wherein a first side surface of the sixth lens is a convex surface, and a second side surface is a concave surface.

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

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

4. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a convex surface.

5. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a concave surface.

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

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

8. The optical lens according to claim 1, characterized in that: The fifth lens has positive refractive power.

9. The optical lens according to claim 1, characterized in that: The fifth lens has negative refractive power.

10. An optical lens, characterized in that: From the first side to the second side, it includes: a first lens having positive optical power; a second lens having positive optical power; a third lens having negative optical power; a fourth lens having negative optical power; a fifth lens having optical power; a sixth lens having optical power; The curvature radius R8 of the second side surface of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: 0.001≤R8 / F.

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