Optical lens and electronic device having the same

Abstract

The present invention provides an optical lens and an electronic device having the same, comprising a first lens to a fifth lens, wherein the first lens has a negative optical focal length; the fourth lens has a positive optical focal length; and the fifth lens has a positive optical focal length; wherein 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, and the center thickness d1 of the first lens on the optical axis of the optical lens satisfy: 0.8≤(R2+d1) / R1≤1.8; the combined focal length F23 of the second lens and the third lens, and the focal length value F of the entire group of the optical lens satisfy: ‑10≤F23 / F≤0; the air interval d2 between the first lens and the second lens on the optical axis of the optical lens, and the optical back focus BFL of the optical lens satisfy: d2 / BFL≤0.8. The present application solves the problem in the prior art that it is difficult to take into account high resolution, small telecentricity, and long back focus of the optical lens.

Description

Technical Field

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

[0002] As an important component of projectors and PGU (optical engine), the performance of optical lenses directly affects the quality and effect of projection display. With the continuous advancement of DMD (digital micromirror device) and LCOS (liquid crystal silicon light modulator) chip technology, the requirements for optical lenses are also increasing. Especially for optical lenses for vehicle-mounted applications, with the continuous development of autonomous driving technology, as a key component of autonomous driving assistance systems, the performance requirements of optical lenses are also increasing. Autonomous driving requires accurate judgment of objects in front of the vehicle, so forward-looking optical lenses are particularly important in autonomous driving. Existing optical lenses are limited by optical design and manufacturing processes, resulting in the inability of the resolution of optical lenses to match high-resolution chips. The insufficient telecentricity of the optical lens will cause the light to be unable to be evenly projected to the entire imaging area, resulting in a waste of light effect. Existing optical lenses are difficult to achieve ideal telecentricity while maintaining cost-effectiveness. In addition, the installation space for optical lenses is limited. Due to the limitation of the internal space of the vehicle, the back focal length is insufficient and lenses with longer focal lengths cannot be installed.

[0003] In other words, the optical lens in the prior art has the problem of being difficult to achieve high resolution, small telecentricity, and long back focus at the same time. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens and an electronic device having the same, so as to solve the problem in the prior art that the optical lens has high resolution, small telecentricity and long back focus and is difficult to take into account at the same time.

[0005] To achieve the above objective, according to one aspect of the present invention, there is provided an optical lens, comprising: a first lens, the first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens; a third lens; a fourth lens, the fourth lens having positive optical power, and a second side surface of the fourth lens being convex; and a fifth lens, the fifth lens having positive optical power; wherein a radius of curvature R1 of the first side surface of the first lens, a radius of curvature R2 of the second side surface of the first lens, and a center thickness d1 of the first lens on the optical axis of the optical lens satisfy: 0.8≤(R2+d1) / R1≤1.8; a combined focal length F23 of the second lens and the third lens, and a focal length value F of the entire group of the optical lens satisfy: -10≤F23 / F≤0; and an air interval d2 on the optical axis between the first lens and the second lens, and an optical back focus BFL of the optical lens satisfy: d2 / BFL≤0.8.

[0006] Furthermore, the second lens has positive optical power or negative optical power. When the second lens has positive optical power, the first side surface of the second lens is concave or flat or convex, and the second side surface of the second lens is convex; when the second lens has negative optical power, the surface shape of the first side surface of the second lens and the second side surface of the second lens is convex-concave or concave-convex or concave-flat or flat-concave or concave-concave.

[0007] Further, the third lens has positive focal power or negative focal power. When the third lens has positive focal power, the surface shapes of the first side surface of the third lens and the second side surface of the third lens are convex-convex or convex-concave or plano-convex or convex-planar or concave-convex; when the third lens has negative focal power, the surface shapes of the first side surface of the third lens and the second side surface of the third lens are concave-concave or convex-concave or concave-planar or plano-concave or concave-convex.

[0008] Furthermore, the first side surface of the fourth lens is a concave surface, a convex surface or a plane surface.

[0009] Furthermore, the surface shapes of the first side surface of the fifth lens and the second side surface of the fifth lens are convex-convex, convex-planar, convex-concave, plano-convex, or concave-convex.

[0010] Furthermore, at least one of the following conditions is met: 45≤(FOV×F) / H≤70, 1≤F / H≤5, wherein the maximum field of view angle of the optical lens is FOV, the focal length value of the entire group of the optical lens is F, and the image height corresponding to the maximum field of view angle of the optical lens is H.

[0011] Furthermore, at least one of the following conditions is met: TTL / F≤5, TTL / H / FOV≤1, TTL / H / θ≤24, TTL / DMAX≤4.5, D / H / FOV≤0.25, D / H / θ≤6.5, 0.35≤(F×θ) / D≤0.8, D / H / F≤0.35, wherein the total optical length of the optical lens is TTL, the focal length value of the entire group of the optical lens is F, the image height corresponding to the maximum field of view angle of the optical lens is H, the maximum field of view angle of the optical lens is FOV, the arc value of the maximum field of view angle of the optical lens is θ, the maximum clear aperture of the optical lens is DMAX, and the maximum effective clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens is D.

[0012] Furthermore, at least one of the following conditions is satisfied: 0.2≤BFL / TTL≤0.6, 0.3≤BFL / TL≤0.8, wherein the optical back focus of the optical lens is BFL, the total optical length of the optical lens is TTL, and the total lens length of the optical lens is TL.

[0013] Furthermore, a curvature radius R1 of the first side surface of the first lens and a focal length value F of the entire optical lens group satisfy: R1 / F≤2.5.

[0014] Further, at least one of the following conditions is satisfied: F / ENPD≤2.6, F / ENPD / D≤0.3, 0.2≤DST / F≤0.8, Lb / Lf≥2, wherein the focal length value of the entire group of the optical lens is F, the entrance pupil diameter of the optical lens is ENPD, the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens is D, the aperture diameter of the optical lens is DST, the optical lens also includes a aperture, the aperture is located between the third lens and the fourth lens, the distance between the first side surface of the fourth lens and the aperture along the optical axis is Lb, and the distance between the second side surface of the third lens and the aperture along the optical axis is Lf.

[0015] Furthermore, the focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: |F1 / F|≥3.

[0016] Furthermore, at least one of the following conditions is satisfied: R2 / F≤1.2, 0.8≤R1 / R2≤8, wherein the radius of curvature of the first side surface of the first lens is R1, the radius of curvature of the second side surface of the first lens is R2, and the focal length value of the entire group of the optical lens is F.

[0017] Furthermore, a maximum effective light aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and a maximum effective light aperture D3 of the first side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy: 1.2≤D / D3≤4.5.

[0018] Furthermore, an air interval L23 between the second lens and the third lens on the optical axis and a total lens length TL of the optical lens satisfy: L23 / TL≤0.3.

[0019] Furthermore, the center thickness d1 of the first lens on the optical axis and the total lens length TL of the optical lens satisfy: 0.1≤d1 / TL≤0.32.

[0020] Furthermore, an air interval d2 between the first lens and the second lens on the optical axis, a center thickness d1 of the first lens on the optical axis, and a center thickness d3 of the third lens on the optical axis satisfy: d2 / (d1+d3)≤2.

[0021] Further, at least one of the following conditions is satisfied: 1≤|d1×F23 / F5|≤35, 0.1≤d1 / F45≤1.2, 0.5≤|d1×F45 / F23|≤10, wherein the center thickness of the first lens on the optical axis is d1, the combined focal length of the second lens and the third lens is F23, the focal length of the fifth lens is F5, and the combined focal length of the fourth lens and the fifth lens is F45.

[0022] Furthermore, a radius of curvature R8 of the second side surface of the fourth lens and a focal length value F of the entire optical lens group satisfy: -2≤R8 / F≤0.

[0023] Furthermore, at least one of the following conditions is satisfied: |F2 / F|≥0.1, 0.1≤|F3 / F|≤5, wherein the focal length of the second lens is F2, the focal length of the third lens is F3, and the focal length value of the entire optical lens group is F.

[0024] Furthermore, at least one of the following conditions is satisfied: 0≤F4 / F≤3, 0≤F5 / F≤5.5, wherein the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, and the focal length value of the entire optical lens group is F.

[0025] Further, a center thickness d8 of the fourth lens on the optical axis and a center thickness d10 of the fifth lens on the optical axis satisfy: 0.1≤d8 / d10≤4.5.

[0026] Furthermore, an air interval d2 between the first lens and the second lens on the optical axis and a total lens length TL of the optical lens satisfy: d2 / TL≤0.6.

[0027] Further, at least one of the following conditions is satisfied: 48≤(FOV×F) / H≤65, TTL / F≤4, TTL / H / FOV≤0.6, TTL / H / θ≤22, TTL / DMAX≤4, 0.4≤(F×θ) / D≤0.65, D / H / FOV≤0.15, D / H / θ≤5.8, D / H / F≤0.2, 0.25≤BFL / TTL≤0.5, 0.35≤BFL / TL≤0.75, 1.5≤F / H≤3, F / ENPD≤2.3, F / ENPD / D≤0.2, 0.8≤DST / F≤0.65, Lb / Lf≥3.5, 1≤R1 / R2≤5, 1.4≤D / D3≤ 3. L23 / TL≤0.2, R1 / F≤1.5, R2 / F≤0.9, 0.11≤d1 / TL≤0.3, d2 / (d1+d3)≤1.5 , -5≤F23 / F≤-0.5, -1.2≤R8 / F≤-0.1, 0.5≤F4 / F≤1.8, 1≤F5 / F≤4.5, 0.5≤d8 / d10≤3, d2 / TL≤0.4, d2 / BFL≤0.6, |F2 / F|≥0.2, 0.2≤|F3 / F|≤3, 1≤(R2+d1 ) / R1≤1.65, 1.5≤|d1×F23 / F5|≤25, 0.2≤d1 / F45≤1, 0.7≤|d1×F45 / F23|≤9.

[0028] Further, at least one of the following conditions is satisfied: 53.515≤(FOV×F) / H≤59.409, 3.072≤TTL / F≤3.870, 0.244≤TTL / H / FOV≤0.346, 14.002≤TTL / H / θ≤19.805, 3.167≤TTL / DMAX≤3.805, 0.427≤(F×θ) / D≤0.573, 0.065≤D / H / FOV≤0.093, 3.697≤D / H / θ≤5.3 34. 0.105≤D / H / F≤0.138, 0.304≤BFL / TTL≤0.400, 0.436≤BFL / TL≤0.667, 1.982≤F / H≤2.324, 2.147≤F / ENPD≤2 .172, 0.122≤F / ENPD / D≤0.164, 0.325≤DST / F≤0.529, 4.194≤Lb / Lf≤100.101, 1.237≤R1 / R2≤1.764, 1.642≤D / D3≤2.373, 0≤L23 / TL≤0.101, 0.459≤R1 / F≤1.011, 0.287≤R2 / F≤0.817, 0.136≤d1 / TL≤0.280, 0.256≤d2 / (d1+d 3)≤1.406, -5.871≤F23 / F≤-0.708, -0.844≤R8 / F≤-0.375, 0.676≤F4 / F≤1.553, 1.365≤F5 / F≤3.426, 0.970≤d8 / d10≤2.550, 0.084≤d2 / TL≤0.238, 0.150≤d2 / BFL≤0.425, 0.343≤|F2 / F|≤285.178, 0.421≤|F3 / F|≤1.842, 1.170≤(R2+d1) / R1≤1.598, 2.214≤|d1×F23 / F5|≤20.558, 0.323≤d1 / F45≤0.841, 0.924≤|d1×F45 / F23|≤8.258.

[0029] According to another aspect of the present invention, there is provided an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0030] According to the technical solution of the present invention, the optical lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the first lens has negative focal power, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface; the fourth lens has positive focal power, and the second side surface of the fourth lens is a convex surface; the fifth lens has positive focal power; wherein 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, and the center thickness d1 of the first lens on the optical axis of the optical lens satisfy: 0.8≤(R2+d1) / R1≤1.8; the combined focal length F23 of the second lens and the third lens and the whole group focal length value F of the optical lens satisfy: -10≤F23 / F≤0; the air interval d2 between the first lens and the second lens on the optical axis and the optical back focus BFL of the optical lens satisfy: d2 / BFL≤0.8.

[0031] The above technical solution can diverge the light by setting the first lens to have a negative focal length, disperse the central light and the edge light of each field of view, increase the illumination of the optical lens, and the light emitted through the first lens can make the rear optical system have a larger light receiving surface, so that the light of a large field of view enters the rear optical system to achieve a large field of view. The first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface, which is conducive to the smooth passage of the converged light. In conjunction with the rear lens, it is conducive to achieving a long back focus and correcting the chromatic aberration of the optical lens. By setting the fourth lens to have a positive focal length, it is conducive to converging the light from the third lens, making the light trend of the rear optical system flat, and is conducive to achieving a small CRA. The second side surface of the fourth lens is a convex surface, which is conducive to converging light, and smoothly transitioning the light of the front optical system to the rear optical system, which is conducive to achieving a long back focus. By setting the fifth lens to have a positive focal length, the light from the fourth lens is converged, so that the light transitions smoothly, and the fourth lens is assisted to jointly achieve a small CRA.

[0032] By limiting 0.8≤(R2+d1) / R1≤1.8, the shape of the first lens can be reasonably controlled so that the first lens can receive a large field of view while correcting the field of view aberration and reducing distortion. By limiting -10≤F23 / F≤0, the combined focal length of the second lens and the third lens is large, the aberration of the combination of the second lens and the third lens is small, and the sensitivity of the optical lens is low. By limiting d2 / BFL≤0.8, the interval between the first lens and the rear optical system is controlled within a certain range, so that the light trend in the rear optical system is stable, which is conducive to achieving a long back focus.

[0033] The optical lens of the present application controls the focal length of the first lens to be larger, the radius of curvature of the first side of the first lens to be smaller, and the spacing between the first lens and the second lens to be shorter, so that the first lens can compress the light to the limit, correct the field aberration, reduce distortion, and improve the resolution. The spacing between the second lens and the third lens is controlled to be smaller, and the chromatic aberration is eliminated to improve the resolution. In addition, the combined focal length of the second lens and the third lens is negative, and the focal length is small, which is conducive to correcting the aberration caused by other lenses with positive focal lengths, achieving long back focus, and improving the resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figures 1 to 13 The cross-sectional views of the optical lenses of Example 1-1 to Example 1-13 of the first embodiment of the present invention are respectively shown;

[0036] Figures 14 to 26 The cross-sectional views of the optical lenses of Example 2-1 to Example 2-13 of the second embodiment of the present invention are respectively shown;

[0037] Figures 27 to 39 The cross-sectional views of the optical lenses of Example 3-1 to Example 3-13 of the third embodiment of the present invention are respectively shown;

[0038] Figures 40 to 52 The cross-sectional views of the optical lenses of Examples 4-1 to 4-13 of the fourth embodiment of the present invention are respectively shown;

[0039] Figure 53 to Figure 63 The cross-sectional views of the optical lenses of Example 5-1 to Example 5-11 of the fifth embodiment of the present invention are respectively shown;

[0040] Figure 64 to Figure 74 Cross-sectional views of optical lenses according to Examples 6-1 to 6-11 of the sixth embodiment of the present invention are respectively shown.

[0041] The above drawings include the following reference numerals:

[0042] STO, aperture; L1, first lens; S1, first side surface of the first lens; S2, second side surface of the first lens; L2, second lens; S3, first side surface of the second lens; S4, second side surface of the second lens; L3, third lens; S5, first side surface of the third lens; S6, second side surface of the third lens; L4, fourth lens; 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; IMA, imaging surface. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the first side of the lens, and the surface of each lens close to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of the general knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the first side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the second side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0049] This application generally protects ordinary optical lenses. In the accompanying drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side, and the second side is the image side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a vehicle-mounted lens. Light from the object side can be imaged on the image side. When the optical lens in this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a laser radar transmitting end lens. At this time, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0050] In order to solve the problem in the prior art that it is difficult to take into account high resolution, small telecentricity and long back focus of an optical lens, the present invention provides an optical lens and an electronic device having the same.

[0051] like Figures 1 to 74 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens, the first lens has negative optical power, the first side surface of the first lens is convex, and the second side surface of the first lens is concave; the fourth lens has positive optical power, and the second side surface of the fourth lens is convex; the fifth lens has positive optical power; wherein, 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, and the center thickness d1 of the first lens on the optical axis of the optical lens satisfy: 0.8≤(R2+d1) / R1≤1.8; the combined focal length F23 of the second lens and the third lens, and the entire group focal length value F of the optical lens satisfy: -10≤F23 / F≤0; the air interval d2 between the first lens and the second lens on the optical axis, and the optical back focus BFL of the optical lens satisfy: d2 / BFL≤0.8.

[0052] The above technical solution can diverge the light by setting the first lens to have a negative focal length, disperse the central light and the edge light of each field of view, increase the illumination of the optical lens, and the light emitted by the first lens can make the rear optical system have a larger light receiving surface, so that the light of a large field of view enters the rear optical system to achieve a large field of view. The first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface, which is conducive to the smooth passage of the converged light. In conjunction with the rear lens, it is conducive to achieving a long back focus and correcting the chromatic aberration of the optical lens. By setting the fourth lens to have a positive focal length, it is conducive to converging the light from the third lens, making the light trend of the rear optical system flat, and is conducive to achieving a small CRA. The second side surface of the fourth lens is a convex surface, which is conducive to converging light, and smoothly transitioning the light of the front optical system to the rear optical system, which is conducive to achieving a long back focus. By setting the fifth lens to have a positive focal length, the fifth lens is set to have a positive focal length to have a converging effect on the light, converging the light from the fourth lens, making the light transition smoothly, and assisting the fourth lens to jointly achieve a small CRA.

[0053] By limiting 0.8≤(R2+d1) / R1≤1.8, the shape of the first lens can be reasonably controlled so that the first lens can receive light with a large field of view while correcting the field of view aberration and reducing distortion. Preferably, 1≤(R2+d1) / R1≤1.65, the shape of the first lens can be further optimized to improve the imaging quality. Further preferably, 1.170≤(R2+d1) / R1≤1.598, the field of view can be further increased. By limiting -10≤F23 / F≤0, the combined focal length of the second lens and the third lens is large, the aberration of the combination of the second lens and the third lens is small, and the sensitivity of the optical lens is low. Preferably, -5≤F23 / F≤-0.5, which helps to improve the optical performance of the optical lens and effectively improves the contrast and resolution. Further preferably, -5.871≤F23 / F≤-0.708, reduces edge blur, improves edge clarity, and improves the imaging uniformity of the optical lens. By limiting d2 / BFL≤0.8, the interval between the first lens and the rear optical system is controlled within a certain range, so that the light trend in the rear optical system is stable, which is conducive to achieving a long back focus. Preferably, d2 / BFL≤0.6 can more effectively stabilize the light trend. Further preferably, 0.150≤d2 / BFL≤0.425 can stabilize the light trend and help achieve a longer back focus.

[0054] Optionally, the second lens has positive focal length, and when the second side surface of the second lens is convex, the first side surface of the second lens can be concave. In this case, the focal length of the second lens is positive, which plays a role in converging light, and cooperates with the first lens to converge and compress the divergent large-field light to the rear optical system, thereby achieving a large field of view and improving edge resolution. The first side surface of the second lens can also be set as a convex surface, which plays a role in converging light to the second side surface of the second lens. Of course, the first side surface of the second lens can also be a plane, which is conducive to the transition of light to the rear optical system. Of course, the first side surface of the second lens can also be a concave surface, which is conducive to receiving large-angle light and transitioning it to the rear optical system.

[0055] Optionally, when the second lens has a negative optical power, the surface shape of the first side surface of the second lens and the second side surface of the second lens can be convex-concave. At this time, the optical power of the second lens is negative, which plays a role in diverging light. The first side surface of the second lens is a convex surface to converge the light diffused by the front optical system to the second side surface of the second lens, and the second side surface of the second lens is a concave surface to slightly diffuse the light excessively converged by the first side surface to the third lens, which is conducive to the light entering the rear optical system smoothly and improving the resolution. Of course, the surface shape of the first side surface of the second lens and the second side surface of the second lens can also be concave-convex. The first side surface of the second lens is a concave surface to appropriately diffuse the light diffused by the front optical system to the rear optical system, and the second side surface of the second lens is a convex surface to appropriately converge the light diffused by the first side surface and then transfer it to the third lens, which is conducive to the light entering the rear optical system smoothly and improving the resolution. Of course, the surface shape of the first side surface of the second lens and the second side surface of the second lens can also be concave-flat, and the second side surface of the second lens is a plane, which is conducive to the transition of light to the third lens. Of course, the surface shape of the first side surface of the second lens and the second side surface of the second lens can also be plano-concave, and the first side surface of the second lens is a plane, which plays a role in transitioning the light to the second side surface of the second lens. Of course, the surface shape of the first side surface of the second lens and the second side surface of the second lens can also be concave-concave, and the second side surface of the second lens is a concave surface, which is conducive to reducing the light deflection angle, smoothing the light trend, and reducing sensitivity.

[0056] Optionally, when the third lens has positive focal power, the surface type of the first side surface of the third lens and the second side surface of the third lens can be convex-convex, and the focal power of the third lens is positive, which further converges the light to the rear optical system, compresses the light path to achieve a small total length of the optical lens. The first side surface and the second side surface of the third lens are convex, which converge the light and compress the light path to the rear optical system, thereby shortening the total length of the optical lens. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be convex-concave, and the second side surface of the third lens is concave, which plays a role in properly diffusing the excessively converged light of the front optical system, which is conducive to achieving a long back focus. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be concave-convex, and the first side surface of the third lens is concave, which appropriately diverges the excessively converged light of the front optical system, so that the light smoothly transitions to the rear optical system, which is conducive to achieving a long back focus. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be plano-convex, and the first side surface of the third lens is a plane, which plays a role in transitioning the light to the second side surface of the second lens. Of course, the first side surface of the third lens and the second side surface of the third lens can also be convex and flat, and the second side surface of the third lens is a plane, which plays the role of transitioning light to the fourth lens.

[0057] Optionally, when the third lens has a negative optical power, the surface type of the first side surface of the third lens and the second side surface of the third lens is concave-concave, the optical power of the third lens is negative, and the excessively converged light of the front optical system is appropriately diverged to the rear optical system, so that the light smoothly transitions to the rear optical system, which is conducive to achieving a long back focus. The first side surface and the second side surface of the third lens are concave surfaces, which play a role in properly diverging the excessively converged light of the front optical system to the rear optical system, so that the light smoothly transitions. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be convex-concave, and the first side surface of the third lens is convex, which properly converges the excessively diverged light of the front optical system, so that the light smoothly transitions to the rear optical system, which is conducive to achieving a long back focus. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be concave-flat, and the second side surface of the third lens is a plane, which plays a role in transitioning the light to the fourth lens. Of course, the surface type of the first side surface of the third lens and the second side surface of the third lens can also be plano-concave, and the first side surface of the third lens is a plane, which plays a role in transitioning the light to the second side surface of the third lens. Of course, the surface shapes of the first side surface of the third lens and the second side surface of the third lens can also be concave and convex. The second side surface of the third lens is a convex surface, which plays the role of converging light and smoothly transitions the excessively divergent light of the front optical system to the rear optical system, which is conducive to achieving a long back focus.

[0058] Optionally, when the first side surface of the fourth lens can be a concave surface, it plays the role of appropriately diffusing the excessively converged light of the front optical system, which is conducive to achieving a long back focus. The second side surface of the fourth lens is a convex surface, which smoothly transitions the excessively divergent light of the front optical system to the rear optical system, which is conducive to achieving a long back focus. Of course, when the first side surface of the fourth lens can also be a convex surface, the first side surface and the second side surface of the fourth lens are both convex surfaces, which strengthens the convergence effect and makes the light of the rear optical system flat, which is conducive to achieving a small CRA. Of course, when the first side surface of the fourth lens can also be a plane, it plays the role of transitioning the light to the rear optical system.

[0059] Optionally, the surface type of the first side surface of the fifth lens and the second side surface of the fifth lens can be convex-convex, and the first side surface of the fifth lens is a convex surface, which further converges the light from the fourth lens, so that the light transitions smoothly, and assists the fourth lens to jointly achieve a small CRA. The second side surface of the fifth lens is a convex surface, so that the light transitions smoothly to the imaging surface. Of course, the surface type of the first side surface of the fifth lens and the second side surface of the fifth lens can also be convex-flat, and the second side surface of the fifth lens is a plane, which plays the role of transitioning the light to the imaging surface. Of course, the surface type of the first side surface of the fifth lens and the second side surface of the fifth lens can also be convex-concave, and the second side surface of the fifth lens is a concave surface, which appropriately diverges the excessively converged light of the front optical system, so that the light transitions smoothly to the imaging surface, which is conducive to achieving a small CRA. Of course, the surface type of the first side surface of the fifth lens and the second side surface of the fifth lens can also be plano-convex, and the first side surface of the fifth lens is a plane, which plays the role of transitioning the light to the second side surface of the fifth lens. Of course, the surface type of the first side surface of the fifth lens and the second side surface of the fifth lens can also be concave-convex, and the first side surface of the fifth lens is a concave surface, which appropriately diverges the excessively converged light of the front optical system, so that the light transitions smoothly to the rear optical system.

[0060] In this embodiment, at least one of the following conditions is satisfied: 45≤(FOV×F) / H≤70, 1≤F / H≤5, wherein the maximum field of view angle of the optical lens is FOV, the focal length value of the entire group of the optical lens is F, and the image height corresponding to the maximum field of view angle of the optical lens is H. By limiting 1≤F / H≤5, the focal length and image height are controlled within a certain range, which is conducive to improving the resolution of the optical lens. Preferably, 1.5≤F / H≤3 helps to improve the resolution of the optical lens and make the imaging surface clearer. Further preferably, 1.982≤F / H≤2.324 can provide better imaging quality and reduce the aberration of the optical lens. By limiting 45≤(FOV×F) / H≤70, the large field of view and telephoto of the optical lens can be met, which helps to improve the central resolution of the optical lens. Preferably, 48≤(FOV×F) / H≤65 helps to improve the field of view of the optical lens. Further preferably, 53.515≤(FOV×F) / H≤59.409, which further improves the resolution of the optical lens.

[0061] In this embodiment, at least one of the following conditions is met: TTL / F≤5, TTL / H / FOV≤1, TTL / H / θ≤24, TTL / DMAX≤4.5, D / H / FOV≤0.25, D / H / θ≤6.5, 0.35≤(F×θ) / D≤0.8, D / H / F≤0.35, wherein the total optical length of the optical lens is TTL, the focal length of the entire optical lens group is F, the image height corresponding to the maximum field of view of the optical lens is H, the maximum field of view of the optical lens is FOV, the arc value of the maximum field of view of the optical lens is θ, the maximum aperture of the optical lens is DMAX, and the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens is D. In order to meet the demand for miniaturization of the optical lens, it can be achieved in a variety of different ways. By limiting TTL / F≤5, the total length of the optical lens can be shorter under a certain focal length, which is conducive to the miniaturization of the optical lens. By limiting TTL / H / FOV≤1, the total length of the optical lens can be shorter under the same field of view, and the miniaturization of the optical lens can be achieved. By limiting TTL / H / θ≤24, the total length of the optical lens can be shorter under the same imaging plane, and the miniaturization of the optical lens can be achieved. By limiting TTL / DMAX≤4.5, TTL / DMAX is at a smaller value, and the total length of the optical lens is relatively short, which is conducive to the miniaturization of the optical lens. By limiting D / H / FOV≤0.25, the optical lens can be controlled to have a small aperture under a certain image height, which is conducive to the miniaturization of the optical lens. By limiting D / H / θ≤6.5, the optical lens can be controlled to have a small aperture under a certain field of view, which is conducive to the miniaturization of the optical lens. It is also possible to limit 0.35≤(F×θ) / D≤0.8 so that the field of view is within a certain range, and the optical lens can have a small aperture, which is conducive to miniaturization. The optical lens can also achieve a small aperture by limiting D / H / F≤0.35 and controlling it under a certain field of view angle and focal length, which is conducive to the miniaturization of the optical lens. Preferably, at least one of the following conditions is met: TTL / F≤4, 3.072≤TTL / F≤3.870, TTL / H / θ≤22, TTL / DMAX≤4, D / H / FOV≤0.15, D / H / θ≤5.8, 0.4≤(F×θ) / D≤0.65, D / H / F≤0.2, which is conducive to the miniaturization of the optical lens. Further preferably, at least one of the following conditions is met: 3.072≤TTL / F≤3.870, 0.244≤TTL / H / FOV≤0.346, 14.002≤TTL / H / θ≤19.805, 0.065≤D / H / FOV≤0.093, 3.697≤D / H / θ≤5.334, 0.427≤(F×θ) / D≤0.573, 0.105≤D / H / F≤0.138, which further ensures the miniaturization of the optical lens.

[0062] In this embodiment, at least one of the following conditions is satisfied: 0.2≤BFL / TTL≤0.6, 0.3≤BFL / TL≤0.8, wherein the optical back focus of the optical lens is BFL, the optical total length of the optical lens is TTL, and the total lens length of the optical lens is TL. In order to meet the demand of the optical lens for long back focus, it can be achieved by one or more of the different limiting methods. By limiting 0.2≤BFL / TTL≤0.6, the long back focus demand of the optical lens can be met, the long back focus effect can be achieved, and sufficient space can be left for adding optical devices such as prisms, which is easy to process and assemble. It is also possible to meet the long back focus demand of the optical lens by limiting 0.3≤BFL / TL≤0.8, the long back focus effect can be achieved, and sufficient space can be left for adding optical devices such as prisms, which is easy to process and assemble. Preferably, at least one of the following conditions is satisfied: 0.25≤BFL / TTL≤0.5, 0.35≤BFL / TL≤0.75, which helps to achieve a long back focus and optimize the spatial layout inside the optical lens. Further preferably, at least one of the following conditions is met: 0.304≤BFL / TTL≤0.400, 0.436≤BFL / TL≤0.667, which can ensure that the back focal length of the optical lens is longer, thereby helping to improve the clarity and contrast of the imaging.

[0063] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the focal length F of the entire group of optical lenses satisfy: R1 / F≤2.5. By limiting R1 / F≤2.5, R1 is controlled to be in a smaller range, which is conducive to maximally compressing the light of a large field of view and compressing and concentrating the edge light, thereby correcting edge aberrations. Preferably, R1 / F≤1.5, which helps to further collect the light of a large field of view. Further preferably, 0.459≤R1 / F≤1.011, which can maximally compress the light of a large field of view and make the light at the edge more concentrated.

[0064] In this embodiment, at least one of the following conditions is satisfied: F / ENPD≤2.6, F / ENPD / D≤0.3, 0.2≤DST / F≤0.8, Lb / Lf≥2, wherein the focal length value of the entire optical lens group is F, the entrance pupil diameter of the optical lens is ENPD, the maximum effective aperture of the first side of the first lens corresponding to the maximum field angle of the optical lens is D, the aperture of the optical lens is DST, and the optical lens further includes an aperture, which is located between the third lens and the fourth lens, and the distance between the first side of the fourth lens and the aperture along the optical axis is Lb, and the distance between the second side of the third lens and the aperture along the optical axis is Lf. In order to meet the demand of the optical lens for high luminous flux, it can be achieved in a variety of different ways. By limiting F / ENPD≤2.6, the relative aperture can be controlled in a smaller range, which is conducive to increasing the light flux of the optical lens and improving the relative illumination of the optical lens. By limiting F / ENPD / D≤0.3, the relative aperture can be controlled within a smaller range, which is beneficial to increase the light throughput of the optical lens and improve the relative illumination of the optical lens. By limiting 0.2≤DST / F≤0.8, the larger the ratio of the aperture diameter to the effective focal length is, the larger the aperture of the optical lens is. Preferably, at least one of the following conditions is met: F / ENPD≤2.3, F / ENPD / D≤0.2, 0.8≤DST / F≤0.65, the light throughput of the optical lens is increased, and the brightness of the optical lens imaging is significantly improved. Further preferably, at least one of the following conditions is met: 2.147≤F / ENPD≤2.172, 0.122≤F / ENPD / D≤0.164, 0.325≤DST / F≤0.529, the relative illumination is further improved, and the brightness and clarity of the imaging surface are improved. By limiting Lb / Lf≥2, the light at the edge of the large field of view can be better intercepted by the aperture, so that the light at the edge of the large field of view is more concentrated, and the resolution of the optical lens at the edge of the large field of view is improved; the distance between the rear optical system of the aperture and the aperture is large, which is conducive to lengthening the optical path of the light in the rear optical system, and the transition between lenses is smooth, which is conducive to achieving small telecentricity and long back focus of the optical lens. Preferably, Lb / Lf≥3.5, which can more effectively intercept the light at the edge of the large field of view and reduce halo and stray light. Further preferably, 4.194≤Lb / Lf≤100.101 can better balance the focal length and field of view of the optical lens.

[0065] In this embodiment, the focal length F1 of the first lens and the focal length value F of the entire optical lens group satisfy: |F1 / F|≥3. By limiting F1 / F≥3, when the focal length of the first lens is controlled to be larger, the aberration generated by the first lens is small, which is conducive to reducing the sensitivity of the first lens.

[0066] In this embodiment, at least one of the following conditions is satisfied: R2 / F≤1.2, 0.8≤R1 / R2≤8, wherein the radius of curvature of the first side surface of the first lens is R1, the radius of curvature of the second side surface of the first lens is R2, and the focal length value of the entire group of the optical lens is F. By limiting 0.8≤R1 / R2≤8, the radius of curvature of the first side surface of the first lens is larger than the radius of curvature of the second side surface of the first lens, and the large curvature of the second side surface of the first lens is beneficial for the large field of view light to enter the first lens and be compressed to the rear optical system, thereby achieving the effect of low distortion of the optical lens. Preferably, 1≤R1 / R2≤5, which helps to optimize the path of the light and reduce the loss of light. Further preferably, 1.237≤R1 / R2≤1.764, which effectively reduces the distortion of the optical lens. By limiting R2 / F≤1.2, the radius of curvature of the second side surface of the first lens is small, which is beneficial to further compress the large field of view light, and the large field of view light passing through the first lens is compressed into a small field of view light, which is beneficial to correct the distortion of the optical lens. Preferably, R2 / F≤0.9, which can reduce the spherical aberration of the optical lens. Further preferably, 0.287≤R2 / F≤0.817, which can more effectively focus the light and reduce the loss of light.

[0067] In this embodiment, the maximum effective aperture D of the first side of the first lens corresponding to the maximum field of view angle of the optical lens and the maximum effective aperture D3 of the first side of the second lens corresponding to the maximum field of view angle of the optical lens satisfy the following conditions: 1.2≤D / D3≤4.5. By limiting 1.2≤D / D3≤4.5, the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens is greater than the maximum effective aperture of the first side of the second lens, which is beneficial for large field of view light to be compressed by the first lens into the rear optical system, so that the optical lens can better collect large field of view light and achieve a large field of view effect. Preferably, D / D3≥1.4, so that light can be effectively collected and compressed. Further preferably, 1.642≤D / D3≤2.373, so that light loss at the edge of the lens can be reduced.

[0068] In this embodiment, the air gap L23 between the second lens and the third lens on the optical axis and the total lens length TL of the optical lens satisfy: L23 / TL≤0.3. By limiting L23 / TL≤0.3, the air gap between the second lens and the third lens on the optical axis is small, which is conducive to the smooth compression of the large field of view light passing through the first lens into a small field of view light, avoiding a large transition amplitude of the light in the front optical system, so as to better cooperate with the rear optical system to achieve small telecentricity and low sensitivity, and correct the chromatic aberration of the optical lens. Preferably, L23 / TL≤0.2, and a smaller air gap can reduce the scattering and reflection of light between lenses. Further preferably, 0≤L23 / TL≤0.101 can reduce the sensitivity of the optical lens to environmental changes.

[0069] In this embodiment, the center thickness d1 of the first lens on the optical axis and the total lens length TL of the optical lens satisfy: 0.1≤d1 / TL≤0.32. By limiting 0.1≤d1 / TL≤0.32, the center thickness of the first lens on the optical axis is larger, which is conducive to enhancing the ability of the first lens to compress light, so that the edge light can be better compressed and concentrated, and the edge resolution of the optical lens is improved. Preferably, 0.11≤d1 / TL≤0.3 can increase the convergence ability of the lens and help improve the edge resolution of the optical lens. Further preferably, 0.136≤d1 / TL≤0.280 can more effectively control the propagation path of light and reduce the scattering of light at the edge of the lens.

[0070] In this embodiment, the air gap d2 between the second lens and the second lens on the optical axis, the center thickness d1 of the first lens on the optical axis, and the center thickness d3 of the third lens on the optical axis satisfy: d2 / (d1+d3)≤2. By limiting d2 / (d1+d3)≤2, the air gap between the first lens and the second lens on the optical axis is small, which is beneficial for the second lens to better receive the light from the first lens to the rear, improve the luminous flux of the optical lens, and achieve a small FNO. Preferably, d2 / (d1+d3)≤1.5, which can more effectively control the propagation of light. Further preferably, 0.256≤d2 / (d1+d3)≤1.406, which is beneficial to achieve higher luminous flux and smaller FNO.

[0071] In this embodiment, at least one of the following conditions is satisfied: 1≤|d1×F23 / F5|≤35, 0.1≤d1 / F45≤1.2, 0.5≤|d1×F45 / F23|≤10, wherein the center thickness of the first lens on the optical axis is d1, the combined focal length of the second lens and the third lens is F23, the focal length of the fifth lens is F5, and the combined focal length of the fourth lens and the fifth lens is F45. By limiting 1≤|d1×F23 / F5|≤35, the relationship between the thickness of the first lens, the combined focal length of the second lens and the third lens, and the focal length of the fifth lens is controlled, so that the light compressed to the limit by the first lens is then transferred to the fifth lens through the second lens and the third lens, and converged to correct the aberration after passing through the fifth lens, so as to achieve high resolution and small telecentricity. Preferably, 1.5≤|d1×F23 / F5|≤25, which effectively optimizes the light path. Further preferably, 2.214≤|d1×F23 / F5|≤20.558, further achieving high resolution and small telecentricity. By limiting 0.1≤d1 / F45≤1.2, the relationship between the thickness of the first lens and the combined focal length of the fourth lens and the fifth lens can be controlled, achieving high resolution and long back focus. Preferably, 0.2≤d1 / F45≤1, which is conducive to the coordinated optimization of the front end and the back end and improves the imaging quality. Further preferably, 0.323≤d1 / F45≤0.841, which is conducive to the reasonable distribution of the focal length of the back end, and further achieving long back focus. By limiting 0.5≤|d1×F45 / F23|≤10, the relationship between the thickness of the first lens, the combined focal length of the second lens and the third lens, and the focal length of the fifth lens is controlled, so that the light compressed by the first lens is then transitioned and diverged to the fifth lens through the second lens and the third lens, and the aberration is corrected after the fourth lens and the fifth lens are converged as a whole, achieving high resolution and small telecentricity, and at the same time, long back focus can be achieved. Preferably, 0.7≤|d1×F45 / F23|≤9, which effectively optimizes the rear focal length layout. Further preferably, 0.924≤|d1×F45 / F23|≤8.258, which further achieves high resolution, small telecentricity and long back focus.

[0072] In this embodiment, the radius of curvature 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: -2≤R8 / F≤0. By limiting -2≤R8 / F≤0, the second side surface of the fourth lens is a convex surface with a small radius of curvature, which is beneficial to enhance the convergence effect of the divergent light of the front optical system, and cooperate with the fifth lens to make the light reach the imaging surface smoothly, so as to achieve a small telecentricity of the optical lens. Preferably, -1.2≤R8 / F≤-0.1, which helps the optical lens to maintain a small telecentricity while providing high-quality imaging. Further preferably, -0.844≤R8 / F≤-0.375 can more accurately control the convergence and divergence of light, thereby achieving more refined imaging control.

[0073] In this embodiment, at least one of the following conditions is satisfied: |F2 / F|≥0.1, 0.1≤|F3 / F|≤5, wherein the focal length of the second lens is F2, the focal length of the third lens is F3, and the focal length value of the entire group of the optical lens is F. By limiting |F2 / F|≥0.1, the focal length ratio of the second lens is reasonably controlled, so that the degree of freedom of the second lens is large, which is conducive to reducing the sensitivity of the optical lens. Preferably, |F2 / F|≥0.2, further limiting the focal length ratio of the second lens to ensure the layout freedom of the second lens. Further preferably, 0.343≤|F2 / F|≤285.178, further reducing the sensitivity of the optical lens. By limiting 0.1≤|F3 / F|≤5, the focal length of the third lens is controlled to be smaller, so that the divergence degree of the light when it is emitted from the third lens is large, which is conducive to achieving a long back focus after the rear end is gathered. Preferably, 0.2≤|F3 / F|≤3, optimizing the light path of the third lens. Further preferably, 0.421≤|F3 / F|≤1.842, further achieving a long back focus.

[0074] In this embodiment, at least one of the following conditions is satisfied: 0≤F4 / F≤3, 0≤F5 / F≤5.5, wherein the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, and the focal length value of the entire optical lens group is F. By limiting 0≤F4 / F≤3, the focal length of the fourth lens is within a certain range, which not only avoids F4 being too large so that the rear optical system cannot smoothly compress the light optical lens and cause the image to fail, but also avoids F4 being too small so that the light is over-converged, thereby ensuring that the long back focus of the optical lens is achieved. Preferably, 0.5≤F4 / F≤1.8 can reduce optical distortion. Further preferably, 0.676≤F4 / F≤1.553 can ensure that the optical lens achieves a long back focus. By limiting 0≤F5 / F≤5.5, the focal length of the fifth lens is within a certain range, which not only avoids F5 being too large so that the rear optical system cannot smoothly compress the light to the imaging surface of the optical lens and cause the image to fail, but also avoids F5 being too small so that the light is over-converged, thereby ensuring that the long back focus of the optical lens is achieved. Preferably, 1≤F5 / F≤4.5, which helps to maintain the imaging quality while ensuring the long back focus of the optical lens. Further preferably, 1.365≤F5 / F≤3.426, which helps to improve the luminous flux and imaging efficiency of the optical lens, reduce light loss, and improve imaging brightness and contrast.

[0075] In this embodiment, the center thickness d8 of the fourth lens on the optical axis and the center thickness d10 of the fifth lens on the optical axis satisfy: 0.1≤d8 / d10≤4.5. By limiting 0.1≤d8 / d10≤4.5, the difference in the center thickness of the fourth lens and the fifth lens on the optical axis is small, and the fluctuation amplitude of the light passing through the fourth lens and the fifth lens is small, which is conducive to the smooth transition of the light to the imaging surface, and is conducive to achieving a long back focus and small telecentricity of the optical lens. Preferably, 0.5≤d8 / d10≤3 is conducive to the smooth transition of the light to the imaging surface. Further preferably, 0.970≤d8 / d10≤2.550 can reduce the fluctuation amplitude of the light when passing through the lens, thereby improving the imaging quality and stability of the optical lens.

[0076] In this embodiment, the air interval d2 between the first lens and the second lens on the optical axis and the total lens length TL of the optical lens satisfy: d2 / TL≤0.6. By limiting d2 / TL≤0.6 and controlling the air interval between the first lens and the second lens on the optical axis within a certain range, the light can be stably moved in the rear optical system, which is conducive to achieving a long back focus of the optical lens. Preferably, d2 / TL≤0.4 can further reduce the scattering and distortion of light. Further preferably, 0.084≤d2 / TL≤0.238 helps to maintain the stability of the optical lens.

[0077] In this embodiment, the second lens and the third lens can be glued to form a glued lens. The use of the glued lens reduces the air gap between the two lenses, making the overall structure of the optical lens compact, while reducing the tolerance sensitivity problems such as overall eccentricity of the lens unit caused by the assembly process, and can also reduce the light loss caused by reflection between lenses. At the same time, 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. In addition, the use of the glued lens can effectively eliminate the influence of ghost images on the lens, so that the lens can ensure a higher resolution on the basis of eliminating ghost images, and the various aberrations of the optical lens can be fully corrected. Under the premise of compact structure, the resolution can be improved, and the optical performance such as distortion and CRA can be optimized.

[0078] It should be noted that the total length TTL of the optical lens is the distance from the first side surface of the first lens to the imaging surface of the optical lens along the direction of the optical axis, the total lens length TL of the optical lens is the distance from the first side surface of the first lens to the second side surface of the fifth lens along the direction of the optical axis, and the optical back focus BFL is the distance from the second side surface of the fifth lens to the imaging surface of the optical lens along the direction of the optical axis.

[0079] Optionally, the optical lens may further include a filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0080] The optical lens in the present application may use multiple lenses, such as the five lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the fifth lens can all use aspherical lenses.

[0081] In an exemplary embodiment, the first lens to the fifth lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve the stability of the system. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. For example, the temperature range of the optical lens with an all-glass design is relatively wide, and stable optical performance can be maintained in the range of -40°C to 105°C. Specifically, when focusing on resolution quality and reliability, the first lens to the fifth lens may all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the fifth lens in the optical lens may also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the fifth lens in the optical lens may also be made of a combination of plastic and glass.

[0082] The present application also provides an electronic device, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0083] 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 five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0084] 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.

[0085] Embodiment 1

[0086] like Figures 1 to 13 , which describes the optical lens of Embodiment 1. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0087] It should be noted that in the basic structural parameter table of optical lenses, the units of radius of curvature and thickness / distance are all millimeters (mm), Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity means infinity.

[0088] It should be noted that the surface shapes of the following aspheric lenses can be defined by but not limited to the following aspheric formulas:

[0089] Formula (1);

[0090] 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 direction of the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (that is, the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; A is the high-order coefficient. The examples show the cone coefficient k and the high-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), and D (10th-order coefficient) that can be used for the surface of the aspheric lens in this example.

[0091] Example 1-1

[0092] like Figure 1 As shown, in Example 1-1, the first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. In this example, the first side surface of the fourth lens has an inflection point. Table 1 shows the basic structural parameter table of the optical lens of Example 1-1. In this example, the first lens and the fourth lens are aspherical lenses. Table 2 below shows the cone coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this example.

[0093] Table 1

[0094]

[0095] Table 2

[0096]

[0097] Example 1-2

[0098] like Figure 2 As shown, the difference in surface shape from Example 1-1 is that in Example 1-2, the second side surface S4 of the second lens is a plane, and the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 3 shows the basic structural parameter table of the optical lens of Example 1-2. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 4 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0099] Table 3

[0100]

[0101] Table 4

[0102]

[0103] Example 1-3

[0104] like Figure 3 As shown, the difference in surface shape from Example 1-1 is that in Example 1-3, the first side surface S5 of the third lens is a convex surface. Table 5 shows the basic structural parameter table of the optical lens of Example 1-3. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 6 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0105] Table 5

[0106]

[0107] Table 6

[0108]

[0109] Example 1-4

[0110] like Figure 4 As shown, the difference in surface shape from Example 1-1 is that in Example 1-4, the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 7 shows the basic structural parameter table of the optical lens of Example 1-4. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 8 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0111] Table 7

[0112]

[0113] Table 8

[0114]

[0115] Example 1-5

[0116] like Figure 5 As shown in the figure, the difference in surface shape from Example 1-1 is that in Example 1-5, the first side surface S7 of the fourth lens is a concave surface. Table 9 shows the basic structural parameter table of the optical lens of Example 1-5. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 10 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0117] Table 9

[0118]

[0119] Table 10

[0120]

[0121] Example 1-6

[0122] like Figure 6 As shown in the figure, the difference in surface shape from Example 1-1 is that in Example 1-6, the first side surface S9 of the fifth lens is a concave surface. Table 11 shows the basic structural parameter table of the optical lens of Example 1-6. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 12 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0123] Table 11

[0124]

[0125] Table 12

[0126]

[0127] Example 1-7

[0128] like Figure 7As shown in the figure, the difference in surface shape from Example 1-1 is that in Example 1-7, the first side surface S5 of the third lens is a convex surface, and the first side surface S7 of the fourth lens is a plane. Table 13 shows the basic structural parameter table of the optical lens of Example 1-7. In this example, the first side surface of the first lens, the second side surface of the first lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 14 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0129] Table 13

[0130]

[0131] Table 14

[0132]

[0133] Example 1-8

[0134] like Figure 8 As shown, the difference in surface shape from Example 1-1 is: in Example 1-8, the second side surface S4 of the second lens is a concave surface, and the first side surface S5 of the third lens is a convex surface. In this example, the first side surface of the fourth lens has an inflection point. Table 15 shows the basic structural parameter table of the optical lens of Example 1-8. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 16 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0135] Table 15

[0136]

[0137] Table 16

[0138]

[0139] Example 1-9

[0140] like Fig. 9 As shown, the difference in surface shape from Example 1-1 is: in Example 1-9, the first side surface S3 of the second lens is a plane, the second side surface S4 of the second lens is a concave surface, the first side surface S5 of the third lens is a convex surface, and the first side surface S7 of the fourth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 17 shows the basic structural parameter table of the optical lens of Example 1-9. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 18 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0141] Table 17

[0142]

[0143] Table 18

[0144]

[0145] Example 1-10

[0146] like Fig.10 As shown in Table 19, the difference in surface shape from Example 1-1 is: in Example 1-10, the first side surface S3 of the second lens is convex, the second side surface S4 of the second lens is concave, the first side surface S5 of the third lens is convex, and the first side surface S7 of the fourth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 19 shows the basic structural parameter table of the optical lens of Example 1-10. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 20 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0147] Table 19

[0148]

[0149] Table 20

[0150]

[0151] Example 1-11

[0152] like Fig.11 As shown in Table 21, the difference in surface shape from Example 1-1 is that in Example 1-11, the second side surface S6 of the third lens is a plane, and the first side surface S9 of the fifth lens is a concave surface. Table 21 shows the basic structural parameter table of the optical lens of Example 1-11. In this example, the first lens and the fourth lens are aspherical lenses. Table 22 below shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0153] Table 21

[0154]

[0155] Table 22

[0156]

[0157] Example 1-12

[0158] like Fig.12As shown in Table 23, the difference in surface shape from Example 1-1 is that in Example 1-12, the second side surface S6 of the third lens is convex, and the first side surface S9 of the fifth lens is concave. Table 23 shows the basic structural parameter table of the optical lens of Example 1-12. In this example, the first lens and the fourth lens are aspherical lenses. Table 24 below shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0159] Table 23

[0160]

[0161] Table 24

[0162]

[0163] Example 1-13

[0164] like Fig.13 As shown, in this example, the first side of the fourth lens has an inflection point. Table 25 shows the basic structural parameter table of the optical lens of Examples 1-13. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 26 shows the cone coefficient k and each high-order term coefficient that can be used for the surface of the aspherical lens in this example.

[0165] Table 25

[0166]

[0167] Table 26

[0168]

[0169] In summary, Examples 1-1 to 1-13 of Embodiment 1 respectively satisfy the relationships shown in Table 27.

[0170] Table 27

[0171]

[0172] Table 28 gives the parameter values ​​(unit: mm) of the optical lenses of Example 1-1 to Example 1-13 of Embodiment 1.

[0173] Table 28

[0174]

[0175] Embodiment 2

[0176] like Figures 14 to 26, which describes the optical lens of Embodiment 2. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0177] Example 2-1

[0178] like Fig.14 As shown, in Example 2-1, the first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is concave, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is concave. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. Light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. In this example, the first side surface of the fourth lens has an inflection point. Table 29 shows the basic structural parameter table of the optical lens of Example 2-1. In this example, the first lens and the fourth lens are aspherical lenses. Table 30 below shows the cone coefficient k and the coefficients of the higher-order terms that can be used for the aspherical lens surface in this example.

[0179] Table 29

[0180]

[0181] Table 30

[0182]

[0183] Example 2-2

[0184] like Fig.15 As shown, the difference in surface shape from Example 2-1 is: in Example 2-2, the second side surface S4 of the second lens is a plane, and the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 31 shows the basic structural parameter table of the optical lens of Example 2-2. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 32 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0185] Table 31

[0186]

[0187] Table 32

[0188]

[0189] Example 2-3

[0190] like Fig.16 As shown in the figure, the difference in surface shape from Example 2-1 is that in Example 2-3, the first side surface S5 of the third lens is a convex surface. Table 33 shows the basic structural parameter table of the optical lens of Example 2-3. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 34 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0191] Table 33

[0192]

[0193] Table 34

[0194]

[0195] Example 2-4

[0196] like Fig.17 As shown, the difference in surface shape from Example 2-1 is that in Example 2-4, the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 35 shows the basic structural parameter table of the optical lens of Example 2-4. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 36 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0197] Table 35

[0198]

[0199] Table 36

[0200]

[0201] Example 2-5

[0202] like Fig.18 As shown in the figure, the difference in surface shape from Example 2-1 is that in Example 2-5, the first side surface S7 of the fourth lens is a concave surface. Table 37 shows the basic structural parameter table of the optical lens of Example 2-5. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 38 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0203] Table 37

[0204]

[0205] Table 38

[0206]

[0207] Example 2-6

[0208] like Fig.19 As shown, the difference in surface shape from Example 2-1 is that in Example 2-6, the first side surface S9 of the fifth lens is a convex surface. Table 39 shows the basic structural parameter table of the optical lens of Example 2-6. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 40 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0209] Table 39

[0210]

[0211] Table 40

[0212]

[0213] Example 2-7

[0214] like Fig. 20 As shown in the figure, the difference in surface shape from Example 2-1 is that in Example 2-7, the first side surface S5 of the third lens is a convex surface, and the first side surface S7 of the fourth lens is a plane. Table 41 shows the basic structural parameter table of the optical lens of Example 2-7. In this example, the first side surface of the first lens, the second side surface of the first lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 42 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0215] Table 41

[0216]

[0217] Table 42

[0218]

[0219] Example 2-8

[0220] like Fig.21 As shown in the figure, the difference in surface shape from Example 2-1 is: in Example 2-8, the second side surface S4 of the second lens is a concave surface, and the first side surface S5 of the third lens is a convex surface. In this example, the first side surface of the fourth lens has an inflection point. Table 43 shows the basic structural parameter table of the optical lens of Example 2-8. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 44 lists the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0221] Table 43

[0222]

[0223] Table 44

[0224]

[0225] Example 2-9

[0226] like Fig. 22 As shown, the difference in surface shape from Example 2-1 is: in Example 2-9, the first side surface S3 of the second lens is a plane, the second side surface S4 of the second lens is a concave surface, the first side surface S5 of the third lens is a convex surface, and the first side surface S7 of the fourth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 45 shows the basic structural parameter table of the optical lens of Example 2-9. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 46 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0227] Table 45

[0228]

[0229] Table 46

[0230]

[0231] Example 2-10

[0232] like Fig.23 As shown, the difference in surface shape from Example 2-1 is: in Example 2-10, the first side surface S3 of the second lens is convex, the second side surface S4 of the second lens is concave, the first side surface S5 of the third lens is convex, and the first side surface S7 of the fourth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 47 shows the basic structural parameter table of the optical lens of Example 2-10. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 48 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0233] Table 47

[0234]

[0235] Table 48

[0236]

[0237] Example 2-11

[0238] like Fig.24As shown, the difference in surface shape from Example 2-1 is that in Example 2-11, the second side surface S6 of the third lens is a plane, and the first side surface S9 of the fifth lens is a concave surface. Table 49 shows the basic structural parameter table of the optical lens of Example 2-11. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 50 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0239] Table 49

[0240]

[0241] Table 50

[0242]

[0243] Example 2-12

[0244] like Fig.25 As shown in the figure, the difference in surface shape from Example 2-1 is that in Example 2-12, the second side surface S6 of the third lens is convex, and the first side surface S9 of the fifth lens is concave. Table 51 shows the basic structural parameter table of the optical lens of Example 2-12. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 52 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0245] Table 51

[0246]

[0247] Table 52

[0248]

[0249] Example 2-13

[0250] like Fig.26 As shown, in this example, the first side of the fourth lens has an inflection point. Table 53 shows the basic structural parameter table of the optical lens of Example 2-13. In this example, the first lens and the fourth lens are aspherical lenses. The following table 54 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0251] Table 53

[0252]

[0253] Table 54

[0254]

[0255] In summary, Examples 2-1 to 2-13 of Embodiment 2 respectively satisfy the relationships shown in Table 55.

[0256] Table 55

[0257]

[0258] Table 56 gives the parameter values ​​(unit: mm) of the optical lenses of Example 2-1 to Example 2-13 of Example 2.

[0259] Table 56

[0260]

[0261] Embodiment 3

[0262] like Figures 27 to 39 , which describes the optical lens of Embodiment 3. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0263] Example 3-1

[0264] like Fig. 27 As shown, in Example 3-1, the first lens L1 has negative 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 a plane, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. Table 57 shows the basic structural parameter table of the optical lens of Example 3-1. In this example, the fourth lens is an aspherical lens. The following Table 58 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0265] Table 57

[0266]

[0267] Table 58

[0268]

[0269] Example 3-2

[0270] like Fig.28As shown, the difference in surface shape from Example 3-1 is: in Example 3-2, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S9 of the fifth lens is concave. In this example, the first side surface of the fourth lens has an inflection point. Table 59 shows the basic structural parameter table of the optical lens of Example 3-2. In this example, the fourth lens is an aspheric lens. The following Table 60 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0271] Table 59

[0272]

[0273] Table 60

[0274]

[0275] Example 3-3

[0276] like Fig.29 As shown, the difference in surface shape from Example 3-1 is that in Example 3-3, the first side surface S3 of the second lens is a concave surface. Table 61 shows the basic structural parameter table of the optical lens of Example 3-3. In this example, the fourth lens is an aspherical lens. The following Table 62 shows the cone coefficient k and various high-order coefficients that can be used for the surface of the aspherical lens in this example.

[0277] Table 61

[0278]

[0279] Table 62

[0280]

[0281] Example 3-4

[0282] like Fig.30 As shown, the difference in surface shape from Example 3-1 is: in Example 3-4, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S7 of the fourth lens is concave. In this example, the first side surface of the fourth lens has an inflection point. Table 63 shows the basic structural parameter table of the optical lens of Example 3-4. In this example, the fourth lens is an aspheric lens. The following Table 64 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0283] Table 63

[0284]

[0285] Table 64

[0286]

[0287] Example 3-5

[0288] like Fig.31 As shown, the difference in surface shape from Example 3-1 is that in Example 3-5, the first side surface S3 of the second lens is a convex surface, and the second side surface S6 of the third lens is a plane. Table 65 shows the basic structural parameter table of the optical lens of Example 3-5. In this example, the fourth lens is an aspherical lens. The following Table 66 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0289] Table 65

[0290]

[0291] Table 66

[0292]

[0293] Example 3-6

[0294] like Fig.32 As shown, the difference in surface shape from Example 3-1 is: in Example 3-6, the first side surface S3 of the second lens is a concave surface, and the first side surface S7 of the fourth lens is a concave surface. In this example, the second lens is bonded to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 67 shows the basic structural parameter table of the optical lens of Example 3-6. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 68 shows the cone coefficient k and the coefficients of various high-order terms that can be used for the surface of the aspherical lens in this example.

[0295] Table 67

[0296]

[0297] Table 68

[0298]

[0299] Example 3-7

[0300] like Fig.33As shown, the difference in surface shape from Example 3-1 is: in Example 3-7, the first side surface S3 of the second lens is a concave surface, and the first side surface S7 of the fourth lens is a plane. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 69 shows the basic structural parameter table of the optical lens of Example 3-7. In this example, the first side surface of the first lens, the second side surface of the first lens and the second side surface of the fourth lens are aspherical surfaces. The following Table 70 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0301] Table 69

[0302]

[0303] Table 70

[0304]

[0305] Example 3-8

[0306] like Fig.34 As shown, the difference in surface shape from Example 3-1 is: in Example 3-8, the first side surface S3 of the second lens is a concave surface, the second side surface S6 of the third lens is a concave surface, and the second side surface S10 of the fifth lens is a concave surface. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 71 shows the basic structural parameter table of the optical lens of Example 3-8. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 72 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0307] Table 71

[0308]

[0309] Table 72

[0310]

[0311] Example 3-9

[0312] like Fig.35As shown, the difference in surface shape from Example 3-1 is: in Example 3-9, the first side surface S3 of the second lens is a concave surface, the first side surface S7 of the fourth lens is a concave surface, and the second side surface S10 of the fifth lens is a plane. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. In this example, the first side surface of the fourth lens has an inflection point. Table 73 shows the basic structural parameter table of the optical lens of Example 3-9. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 74 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0313] Table 73

[0314]

[0315] Table 74

[0316]

[0317] Example 3-10

[0318] like Fig.36 As shown, the difference in surface shape from Example 3-1 is: in Example 3-10, the first side surface S3 of the second lens is a concave surface, the first side surface S5 of the third lens is a convex surface, the second side surface S6 of the third lens is a concave surface, and the first side surface S7 of the fourth lens is a plane. Table 75 shows the basic structural parameter table of the optical lens of Example 3-10. In this example, the first side surface of the first lens, the first side surface of the fourth lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 76 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0319] Table 75

[0320]

[0321] Table 76

[0322]

[0323] Example 3-11

[0324] like Fig.37As shown, the difference in surface shape from Example 3-1 is: in Example 3-11, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S9 of the fifth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 77 shows the basic structural parameter table of the optical lens of Example 3-11. In this example, the fourth lens is an aspheric lens. The following Table 78 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0325] Table 77

[0326]

[0327] Table 78

[0328]

[0329] Example 3-12

[0330] like Fig.38 As shown, the difference in surface shape from Example 3-1 is: in Example 3-12, the first side surface S3 of the second lens is a concave surface, the first side surface S5 of the third lens is a plane, and the second side surface S6 of the third lens is a concave surface. Table 79 shows the basic structural parameter table of the optical lens of Example 3-12. In this example, the first side surface of the first lens, the first side surface of the fourth lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 80 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0331] Table 79

[0332]

[0333] Table 80

[0334]

[0335] Example 3-13

[0336] like Fig.39 As shown, the difference in surface shape from Example 3-1 is that in Example 3-13, the first side surface S3 of the second lens is a concave surface. In this example, the first side surface of the fourth lens has an inflection point. Table 81 shows the basic structural parameter table of the optical lens of Example 3-13. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 82 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0337] Table 81

[0338]

[0339] Table 82

[0340]

[0341] In summary, Examples 3-1 to 3-13 of Embodiment 3 respectively satisfy the relationships shown in Table 83.

[0342] Table 83

[0343]

[0344] Table 84 gives the parameter values ​​(unit: mm) of the optical lenses of Examples 3-1 to 3-13 of Embodiment 3.

[0345] Table 84

[0346]

[0347] Embodiment 4

[0348] like Figures 40 to 52 , which describes the optical lens of Embodiment 4. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0349] Example 4-1

[0350] like Fig.40 As shown, in Example 4-1, the first lens L1 has negative 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 a plane, and the second side surface S4 of the second lens is convex. The third lens L3 has negative power, the first side surface S5 of the third lens is concave, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is convex, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is convex. The light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. Table 85 shows the basic structural parameter table of the optical lens of Example 4-1. In this example, the fourth lens is an aspherical lens. The following Table 86 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0351] Table 85

[0352]

[0353] Table 86

[0354]

[0355] Example 4-2

[0356] like Fig.41 As shown, the difference in surface shape from Example 4-1 is: in Example 4-2, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S9 of the fifth lens is concave. In this example, the first side surface of the fourth lens has an inflection point. Table 87 shows the basic structural parameter table of the optical lens of Example 4-2. In this example, the fourth lens is an aspheric lens. The following Table 88 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0357] Table 87

[0358]

[0359] Table 88

[0360]

[0361] Example 4-3

[0362] like Fig.42 As shown, the difference in surface shape from Example 4-1 is that in Example 4-3, the first side surface S3 of the second lens is a concave surface. Table 89 shows the basic structural parameter table of the optical lens of Example 4-3. In this example, the fourth lens is an aspherical lens. The following Table 90 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0363] Table 89

[0364]

[0365] Table 90

[0366]

[0367] Example 4-4

[0368] like Fig.43 As shown, the difference in surface shape from Example 4-1 is: in Example 4-4, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S7 of the fourth lens is concave. In this example, the first side surface of the fourth lens has an inflection point. Table 91 shows the basic structural parameter table of the optical lens of Example 4-4. In this example, the fourth lens is an aspheric lens. The following Table 92 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0369] Table 91

[0370]

[0371] Table 92

[0372]

[0373] Example 4-5

[0374] like Fig.44 As shown in the figure, the difference in surface shape from Example 4-1 is that in Example 4-5, the first side surface S3 of the second lens is a convex surface, and the second side surface S6 of the third lens is a plane. Table 93 shows the basic structural parameter table of the optical lens of Example 4-5. In this example, the fourth lens is an aspherical lens. The following Table 94 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0375] Table 93

[0376]

[0377] Table 94

[0378]

[0379] Example 4-6

[0380] like Fig.45 As shown, the difference in surface shape from Example 4-1 is: in Example 4-6, the first side surface S3 of the second lens is a concave surface, and the first side surface S7 of the fourth lens is a concave surface. In this example, the second lens is bonded to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 95 shows the basic structural parameter table of the optical lens of Example 4-6. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 96 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0381] Table 95

[0382]

[0383] Table 96

[0384]

[0385] Example 4-7

[0386] like Fig.46As shown, the difference in surface shape from Example 4-1 is: in Example 4-7, the first side surface S3 of the second lens is a concave surface, and the first side surface S7 of the fourth lens is a plane. In this example, the second lens is bonded to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 97 shows the basic structural parameter table of the optical lens of Example 4-7. In this example, the first side surface of the first lens, the second side surface of the first lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 98 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0387] Table 97

[0388]

[0389] Table 98

[0390]

[0391] Example 4-8

[0392] like Fig.47 As shown, the difference in surface shape from Example 4-1 is: in Example 4-8, the first side surface S3 of the second lens is a concave surface, the second side surface S6 of the third lens is a concave surface, and the second side surface S10 of the fifth lens is a concave surface. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 99 shows the basic structural parameter table of the optical lens of Example 4-8. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 100 shows the cone coefficient k and the coefficients of various high-order terms that can be used for the surface of the aspherical lens in this example.

[0393] Table 99

[0394]

[0395] Table 100

[0396]

[0397] Example 4-9

[0398] like Fig.48As shown, the difference in surface shape from Example 4-1 is: in Example 4-9, the first side surface S3 of the second lens is a concave surface, the first side surface S7 of the fourth lens is a concave surface, and the second side surface S10 of the fifth lens is a plane. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. In this example, the first side surface of the fourth lens has an inflection point. Table 101 shows the basic structural parameter table of the optical lens of Example 4-9. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 102 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0399] Table 101

[0400]

[0401] Table 102

[0402]

[0403] Example 4-10

[0404] like Fig.49 As shown, the difference in surface shape from Example 4-1 is: in Example 4-10, the first side surface S3 of the second lens is a concave surface, the first side surface S5 of the third lens is a convex surface, the second side surface S6 of the third lens is a concave surface, and the first side surface S7 of the fourth lens is a plane. Table 103 shows the basic structural parameter table of the optical lens of Example 4-10. In this example, the first side surface of the first lens, the first side surface of the fourth lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 104 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0405] Table 103

[0406]

[0407] Table 104

[0408]

[0409] Example 4-11

[0410] like Fig.50As shown, the difference in surface shape from Example 4-1 is: in Example 4-11, the first side surface S3 of the second lens is convex, the second side surface S6 of the third lens is concave, and the first side surface S9 of the fifth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 105 shows the basic structural parameter table of the optical lens of Example 4-11. In this example, the fourth lens is an aspheric lens. The following Table 106 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0411] Table 105

[0412]

[0413] Table 106

[0414]

[0415] Example 4-12

[0416] like Fig.51 As shown, the difference in surface shape from Example 4-1 is: in Example 4-12, the first side surface S3 of the second lens is a concave surface, the first side surface S5 of the third lens is a plane, and the second side surface S6 of the third lens is a concave surface. Table 107 shows the basic structural parameter table of the optical lens of Example 4-12. In this example, the first side surface of the first lens, the first side surface of the fourth lens, and the second side surface of the fourth lens are aspherical surfaces. The following Table 108 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0417] Table 107

[0418]

[0419] Table 108

[0420]

[0421] Example 4-13

[0422] like Fig.52 As shown, the difference in surface shape from Example 4-1 is that in Example 4-13, the first side surface S3 of the second lens is a concave surface. In this example, the first side surface of the fourth lens has an inflection point. Table 109 shows the basic structural parameter table of the optical lens of Example 4-13. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 110 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0423] Table 109

[0424]

[0425] Table 110

[0426]

[0427] In summary, Examples 4-1 to 4-13 of the fourth embodiment respectively satisfy the relationships shown in Table 111.

[0428] Table 111

[0429]

[0430] Table 112 gives the parameter values ​​(unit: mm) of the optical lenses of Examples 4-1 to 4-13 of Embodiment 4.

[0431] Table 112

[0432]

[0433] Embodiment 5

[0434] like Figure 53 to Figure 63 , which describes the optical lens of Example 5. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0435] Example 5-1

[0436] like Fig.53 As shown, in Example 5-1, the first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. Light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. In this example, the first side surface of the fourth lens has an inflection point. Table 113 shows the basic structural parameter table of the optical lens of Example 5-1. In this example, the fourth lens is an aspherical lens. Table 114 below shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the aspherical lens surface in this example.

[0437] Table 113

[0438]

[0439] Table 114

[0440]

[0441] Example 5-2

[0442] like Fig.54 As shown, the difference in surface shape from Example 5-1 is: in Example 5-2, the second side surface S6 of the third lens is a concave surface, and the first side surface S9 of the fifth lens is a convex surface. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 115 shows the basic structural parameter table of the optical lens of Example 5-2. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 116 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0443] Table 115

[0444]

[0445] Table 116

[0446]

[0447] Example 5-3

[0448] like Fig.55 As shown, the difference in surface shape from Example 5-1 is: in Example 5-3, the first side surface S3 of the second lens is a concave surface, and the second side surface S6 of the third lens is a concave surface. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 117 shows the basic structural parameter table of the optical lens of Example 5-3. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 118 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0449] Table 117

[0450]

[0451] Table 118

[0452]

[0453] Example 5-4

[0454] like Fig.56As shown, the difference in surface shape from Example 5-1 is: in Example 5-4, the second side surface S6 of the third lens is a concave surface, and the first side surface S9 of the fifth lens is a plane. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 119 shows the basic structural parameter table of the optical lens of Example 5-4. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 120 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0455] Table 119

[0456]

[0457] Table 120

[0458]

[0459] Example 5-5

[0460] like Fig.57 As shown, the difference in surface shape from Example 5-1 is: in Example 5-5, the first side surface S3 of the second lens is concave, the first side surface S7 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Table 121 shows the basic structural parameter table of the optical lens of Example 5-5. In this example, the first lens is an aspherical lens. The following Table 122 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0461] Table 121

[0462]

[0463] Table 122

[0464]

[0465] Example 5-6

[0466] like Fig.58 As shown, the difference in surface shape from Example 5-1 is that in Example 5-6, the first side surface S3 of the second lens is a concave surface, and the first side surface S7 of the fourth lens is a plane. Table 123 shows the basic structural parameter table of the optical lens of Example 5-6. In this example, the first lens is an aspherical lens. The following Table 124 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0467] Table 123

[0468]

[0469] Table 124

[0470]

[0471] Example 5-7

[0472] like Fig.59 As shown, the difference in surface shape from Example 5-1 is: in Example 5-7, the first side surface S3 of the second lens is concave, the second side surface S4 of the second lens is a plane, the first side surface S5 of the third lens is concave, the first side surface S7 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Table 125 shows the basic structural parameter table of the optical lens of Example 5-7. In this example, the first lens is an aspheric lens. The following Table 126 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0473] Table 125

[0474]

[0475] Table 126

[0476]

[0477] Example 5-8

[0478] like Fig.60 As shown, the difference in surface shape from Example 5-1 is that in Example 5-8, the first side surface S3 of the second lens is a plane. Table 127 shows the basic structural parameter table of the optical lens of Example 5-8. In this example, the fourth lens is an aspherical lens. The following Table 128 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0479] Table 127

[0480]

[0481] Table 128

[0482]

[0483] Example 5-9

[0484] like Fig.61As shown, the difference in surface shape from Example 5-1 is that in Example 5-9, the second side surface S6 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 129 shows the basic structural parameter table of the optical lens of Example 5-9. In this example, the fourth lens is an aspheric lens. The following Table 130 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0485] Table 129

[0486]

[0487] Table 130

[0488]

[0489] Example 5-10

[0490] like Fig.62 As shown, the difference in surface shape from Example 5-1 is that in Example 5-10, the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens and the second side surface of the fourth lens have an inflection point. Table 131 shows the basic structural parameter table of the optical lens of Example 5-10. In this example, the fourth lens is an aspherical lens. The following Table 132 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0491] Table 131

[0492]

[0493] Table 132

[0494]

[0495] Example 5-11

[0496] like Fig.63 As shown, the difference in surface shape from Example 5-1 is: in Example 5-11, the first side surface S3 of the second lens is concave, the first side surface S7 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 133 shows the basic structural parameter table of the optical lens of Example 5-11. In this example, the first lens is an aspheric lens. The following Table 134 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0497] Table 133

[0498]

[0499] Table 134

[0500]

[0501] In summary, Examples 5-1 to 5-11 of the fifth embodiment respectively satisfy the relationships shown in Table 135.

[0502] Table 135

[0503]

[0504] Table 136 gives the parameter values ​​(unit: mm) of the optical lenses of Example 5-1 to Example 5-11 of Embodiment 5.

[0505] Table 136

[0506]

[0507] Embodiment 6

[0508] like Figure 64 to Figure 74 , which describes the optical lens of Example 6. The optical lens includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5 and an imaging surface IMA.

[0509] Example 6-1

[0510] like Fig.64 As shown, in Example 6-1, the first lens L1 has negative power, the first side surface S1 of the first lens is convex, and the second side surface S2 of the first lens is concave. The second lens L2 has negative power, the first side surface S3 of the second lens is convex, and the second side surface S4 of the second lens is concave. The third lens L3 has positive power, the first side surface S5 of the third lens is convex, and the second side surface S6 of the third lens is convex. The fourth lens L4 has positive power, the first side surface S7 of the fourth lens is concave, and the second side surface S8 of the fourth lens is convex. The fifth lens L5 has positive power, the first side surface S9 of the fifth lens is concave, and the second side surface S10 of the fifth lens is convex. Light from the object passes through each surface S1 to S10 in sequence and is finally imaged on the imaging surface IMA. In this example, the first side surface of the fourth lens has an inflection point. Table 137 shows the basic structural parameter table of the optical lens of Example 6-1. In this example, the fourth lens is an aspherical lens. Table 138 below shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the aspheric lens surface in this example.

[0511] Table 137

[0512]

[0513] Table 138

[0514]

[0515] Example 6-2

[0516] like Fig.65 As shown, the difference in surface shape from Example 6-1 is: in Example 6-2, the second side surface S6 of the third lens is a concave surface, and the first side surface S9 of the fifth lens is a convex surface. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 139 shows the basic structural parameter table of the optical lens of Example 6-2. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 140 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0517] Table 139

[0518]

[0519] Table 140

[0520]

[0521] Example 6-3

[0522] like Fig.66 As shown, the difference in surface shape from Example 6-1 is: in Example 6-3, the first side surface S3 of the second lens is concave, the second side surface S6 of the third lens is concave, and the first side surface S9 of the fifth lens is convex. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 141 shows the basic structural parameter table of the optical lens of Example 6-3. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 142 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0523] Table 141

[0524]

[0525] Table 142

[0526]

[0527] Example 6-4

[0528] like Fig.67As shown, the difference in surface shape from Example 6-1 is: in Example 6-3, the second side surface S6 of the third lens is a concave surface, and the first side surface S9 of the fifth lens is a plane. In this example, the second lens is glued to the third lens, but for the first side surface and the second side surface, when the radius of curvature is the same, the surface shapes of the two are different. Table 143 shows the basic structural parameter table of the optical lens of Example 6-4. In this example, the first lens and the fourth lens are aspherical lenses. The following Table 144 shows the cone coefficient k and the coefficients of various higher-order terms that can be used for the surface of the aspherical lens in this example.

[0529] Table 143

[0530]

[0531] Table 144

[0532]

[0533] Example 6-5

[0534] like Fig.68 As shown, the difference in surface shape from Example 6-1 is: in Example 6-5, the first side surface S3 of the second lens is concave, the first side surface S7 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Table 145 shows the basic structural parameter table of the optical lens of Example 6-5. In this example, the first lens is an aspherical lens. The following table 146 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0535] Table 145

[0536]

[0537] Table 146

[0538]

[0539] Example 6-6

[0540] like Fig.69 As shown, the difference in surface shape from Example 6-1 is that in Example 6-6, the first side surface S3 of the second lens is a concave surface, the first side surface S7 of the fourth lens is a plane, and the first side surface S9 of the fifth lens is a convex surface. Table 147 shows the basic structural parameter table of the optical lens of Example 6-6. In this example, the first lens is an aspheric lens. The following Table 148 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0541] Table 147

[0542]

[0543] Table 148

[0544]

[0545] Example 6-7

[0546] like Fig.70 As shown, the difference in surface shape from Example 6-1 is: in Example 6-7, the first side surface S3 of the second lens is concave, the second side surface S4 of the second lens is a plane, the first side surface S5 of the third lens is concave, the first side surface S7 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is concave. Table 149 shows the basic structural parameter table of the optical lens of Example 6-7. In this example, the first lens is an aspheric lens. The following Table 150 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0547] Table 149

[0548]

[0549] Table 150

[0550]

[0551] Example 6-8

[0552] like Fig.71 As shown, the difference in surface shape from Example 6-1 is that in Example 6-8, the first side surface S3 of the second lens is a plane. Table 151 shows the basic structural parameter table of the optical lens of Example 6-8. In this example, the fourth lens is an aspherical lens. The following Table 152 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0553] Table 151

[0554]

[0555] Table 152

[0556]

[0557] Example 6-9

[0558] like Fig.72As shown, the difference in surface shape from Example 6-1 is that in Example 6-9, the second side surface S6 of the third lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 153 shows the basic structural parameter table of the optical lens of Example 6-9. In this example, the fourth lens is an aspherical lens. The following Table 154 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0559] Table 153

[0560]

[0561] Table 154

[0562]

[0563] Example 6-10

[0564] like Fig.73 As shown, the difference in surface shape from Example 6-1 is that in Example 6-10, the first side surface S5 of the third lens is a plane. In this example, the first side surface of the fourth lens and the second side surface of the fourth lens have an inflection point. Table 155 shows the basic structural parameter table of the optical lens of Example 6-10. In this example, the fourth lens is an aspherical lens. The following Table 156 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspherical lens in this example.

[0565] Table 155

[0566]

[0567] Table 156

[0568]

[0569] Example 6-11

[0570] like Fig.74 As shown, the difference in surface shape from Example 6-1 is: in Example 6-11, the first side surface S3 of the second lens is concave, the second side surface S4 of the second lens is concave, the first side surface S7 of the fourth lens is convex, the second side surface S8 of the fourth lens is convex, the first side surface S9 of the fifth lens is convex, and the second side surface S10 of the fifth lens is a plane. In this example, the first side surface of the fourth lens has an inflection point. Table 157 shows the basic structural parameter table of the optical lens of Example 6-11. In this example, the first lens is an aspheric lens. The following Table 158 shows the cone coefficient k and the coefficients of each high-order term that can be used for the surface of the aspheric lens in this example.

[0571] Table 157

[0572]

[0573] Table 158

[0574]

[0575] Examples 6-1 to 6-11 of the sixth embodiment respectively satisfy the relationships shown in Table 159.

[0576] Table 159

[0577]

[0578] In summary, Table 160 gives the parameter values ​​(unit: millimeter) of the optical lenses of Example 6-1 to Example 6-11 of Example 6.

[0579] Table 160

[0580]

[0581] It should be noted that Table 161 shows the MTF values ​​corresponding to 60 line pairs / mm for each example of Example 1 to Example 6, wherein Examples 5-7 and Examples 6-7 show the MTF values ​​corresponding to 32 line pairs / mm. Each optical lens in each embodiment shows good imaging effects.

[0582] Table 161

[0583]

[0584] 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.

[0585] 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.

[0586] 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.

[0587] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: include: A first lens, wherein the first lens has negative optical power, a first side surface of the first lens is a convex surface, and a second side surface of the first lens is a concave surface; Second lens; The third lens; a fourth lens having positive optical power, wherein the second side surface of the fourth lens is a convex surface; a fifth lens having positive refractive power; The curvature radius R1 of the first side surface of the first lens, the curvature radius R2 of the second side surface of the first lens, and the center thickness d1 of the first lens on the optical axis of the optical lens satisfy the following relationship: 0.8≤(R2+d1) / R1≤1.8; The combined focal length F23 of the second lens and the third lens and the focal length F of the entire optical lens group satisfy the following: -10≤F23 / F≤0; The air interval d2 between the first lens and the second lens on the optical axis and the optical back focus BFL of the optical lens satisfy the following: d2 / BFL≤0.8; The total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy the following condition: TTL / F≤5.

2. The optical lens according to claim 1, characterized in that: The second lens has positive or negative optical power, When the second lens has positive power, the first side surface of the second lens is a concave surface, a plane surface, or a convex surface, and the second side surface of the second lens is a convex surface; When the second lens has negative optical power, the surface shapes of the first side surface of the second lens and the second side surface of the second lens are convex-concave or concave-convex or concave-planar or plano-concave or concave-concave.

3. The optical lens according to claim 1, characterized in that: The third lens has positive or negative optical power, When the third lens has positive power, the surface shapes of the first side surface of the third lens and the second side surface of the third lens are convex-convex or convex-concave or plano-convex or convex-plano or concave-convex; When the third lens has negative optical power, the surface shapes of the first side surface of the third lens and the second side surface of the third lens are concave-concave, convex-concave, concave-planar, plano-concave, or concave-convex.

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

5. The optical lens according to claim 1, characterized in that: The surface shapes of the first side surface of the fifth lens and the second side surface of the fifth lens are convex-convex, convex-planar, convex-concave, plano-convex, or concave-convex.

6. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: 45≤(FOV×F) / H≤70, 1≤F / H≤5, wherein the maximum field of view angle of the optical lens is FOV, the focal length value of the entire group of the optical lens is F, and the image height corresponding to the maximum field of view angle of the optical lens is H.

7. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: TTL / H / FOV≤1, TTL / H / θ≤24, TTL / DMAX≤4.5, D / H / FOV≤0.25, D / H / θ≤6.5, 0.35≤(F×θ) / D≤0.8, D / H / F≤0.35, wherein the total optical length of the optical lens is TTL, the focal length value of the entire group of the optical lens is F, the image height corresponding to the maximum field of view angle of the optical lens is H, the maximum field of view angle of the optical lens is FOV, the arc value of the maximum field of view angle of the optical lens is θ, the maximum clear aperture of the optical lens is DMAX, and the maximum effective clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens is D.

8. The optical lens according to claim 1, characterized in that: At least one of the following conditions is satisfied: 0.2≤BFL / TTL≤0.6, 0.3≤BFL / TL≤0.8, wherein the optical back focus of the optical lens is BFL, the total optical length of the optical lens is TTL, and the total lens length of the optical lens is TL.

9. The optical lens according to claim 1, characterized in that: The curvature radius R1 of the first side surface of the first lens and the focal length value F of the entire group of the optical lens satisfy the following: R1 / F≤2.

5.

10. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: F / ENPD≤2.6, F / ENPD / D≤0.3, 0.2≤DST / F≤0.8, Lb / Lf≥2, wherein the focal length value of the entire group of the optical lens is F, the entrance pupil diameter of the optical lens is ENPD, the maximum effective aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens is D, the aperture diameter of the optical lens is DST, the optical lens also includes an aperture, the aperture is located between the third lens and the fourth lens, the distance between the first side surface of the fourth lens and the aperture along the direction of the optical axis is Lb, and the distance between the second side surface of the third lens and the aperture along the direction of the optical axis is Lf.

11. The optical lens according to claim 1, characterized in that: The focal length F1 of the first lens and the focal length F of the entire optical lens group satisfy: |F1 / F|≥3.

12. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: R2 / F≤1.2, 0.8≤R1 / R2≤8, wherein the radius of curvature of the first side surface of the first lens is R1, the radius of curvature of the second side surface of the first lens is R2, and the focal length value of the entire group of the optical lens is F.

13. The optical lens according to claim 1, characterized in that: The maximum effective light clearance diameter D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the maximum effective light clearance diameter D3 of the first side surface of the second lens corresponding to the maximum field angle of the optical lens satisfy the following: 1.2≤D / D3≤4.

5.

14. The optical lens according to claim 1, characterized in that: An air interval L23 between the second lens and the third lens on the optical axis and a total lens length TL of the optical lens satisfy the following: L23 / TL≤0.

3.

15. The optical lens according to claim 1, characterized in that: The center thickness d1 of the first lens on the optical axis and the total lens length TL of the optical lens satisfy the following: 0.1≤d1 / TL≤0.

32.

16. The optical lens according to claim 1, characterized in that: An air interval d2 between the first lens and the second lens on the optical axis, a center thickness d1 of the first lens on the optical axis, and a center thickness d3 of the third lens on the optical axis satisfy the following: d2 / (d1+d3)≤2.

17. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: 1≤|d1×F23 / F5|≤35, 0.1≤d1 / F45≤1.2, 0.5≤|d1×F45 / F23|≤10, wherein the center thickness of the first lens on the optical axis is d1, the combined focal length of the second lens and the third lens is F23, the focal length of the fifth lens is F5, and the combined focal length of the fourth lens and the fifth lens is F45.

18. The optical lens according to claim 1, characterized in that: 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 the following: -2≤R8 / F≤0.

19. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: |F2 / F|≥0.1, 0.1≤|F3 / F|≤5, wherein the focal length of the second lens is F2, the focal length of the third lens is F3, and the focal length value of the entire optical lens group is F.

20. The optical lens according to claim 1, characterized in that: Satisfies at least one of the following conditions: 0≤F4 / F≤3, 0≤F5 / F≤5.5, wherein the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, and the focal length value of the entire group of optical lenses is F.

21. The optical lens according to claim 1, characterized in that: A center thickness d8 of the fourth lens on the optical axis and a center thickness d10 of the fifth lens on the optical axis satisfy the following: 0.1≤d8 / d10≤4.

5.

22. The optical lens according to claim 1, characterized in that: An air interval d2 between the first lens and the second lens on the optical axis and a total lens length TL of the optical lens satisfy the following: d2 / TL≤0.

6.

23. The optical lens according to claim 1, characterized in that: At least one of the following conditions is met: 48≤(FOV×F) / H≤65, TTL / F≤4, TTL / H / FOV≤0.6, TTL / H / θ≤22, TTL / DMAX≤4, 0.4≤(F×θ) / D≤0.65, D / H / FOV≤0.15, D / H / θ≤5.8, D / H / F≤0.2, 0.25≤BFL / TTL≤0.5, 0.35≤BFL / TL≤0.75, 1.5≤F / H≤3, F / ENPD≤2.3, F / ENPD / D≤0.2, 0.8≤DST / F≤0.65, Lb / Lf≥3.5, 1≤R1 / R2≤5, 1.4 ≤D / D3≤3, L23 / TL≤0.2, R1 / F≤1.5, R2 / F≤0.9, 0.11≤d1 / TL≤0.3, d2 / (d1+d3)≤1.5, -5≤F23 / F≤-0.5, -1.2≤R8 / F≤-0.1, 0.5≤F4 / F≤1.8, 1≤F5 / F ≤4.5, 0.5≤d8 / d10≤3, d2 / TL≤0.4, d2 / BFL≤0.6, |F2 / F|≥0.2, 0.2≤|F3 / F|≤3, 1≤(R2+d1) / R1≤1.65, 1.5≤|d1×F23 / F5|≤25, 0.2≤d1 / F45≤1, 0.7≤|d1×F45 / F23|≤9, wherein the maximum field of view of the optical lens is FOV, the focal length of the entire optical lens group is F, the focal length of the second lens is F2, the focal length of the third lens is F3, the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, the combined focal length of the second lens and the third lens is F23, the combined focal length of the fourth lens and the fifth lens is F45, the image height corresponding to the maximum field of view of the optical lens is H, the total optical length of the optical lens is TTL, the arc value of the maximum field of view of the optical lens is θ, the maximum clear aperture of the optical lens is DMAX, the maximum effective clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens is D, the maximum effective clear aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens is D3, the optical back focus of the optical lens is BFL, and the total lens length of the optical lens is T L, the entrance pupil diameter of the optical lens is ENPD, the optical lens further includes a stop, the stop is located between the third lens and the fourth lens, the stop aperture of the optical lens is DST, the distance between the first side surface of the fourth lens and the stop along the direction of the optical axis is Lb, the distance between the second side surface of the third lens and the stop along the direction of the optical axis is Lf, the radius of curvature of the first side surface of the first lens is R1, the radius of curvature of the second side surface of the first lens is R2, the radius of curvature of the second side surface of the fourth lens is R8, the air gap between the second lens and the third lens on the optical axis is L23, the center thickness of the first lens on the optical axis is d1, the air gap between the first lens and the second lens on the optical axis is d2, the center thickness of the third lens on the optical axis is d3, the center thickness of the fourth lens on the optical axis is d8, and the center thickness of the fifth lens on the optical axis is d10. .

24. The optical lens according to claim 1, characterized in that: At least one of the following conditions is met: 53.515≤(FOV×F) / H≤59.409, 3.072≤TTL / F≤3.870, 0.244≤TTL / H / FOV≤0.346, 14.002≤TTL / H / θ≤19.805, 3.167≤TTL / DMAX≤3.805, 0.427≤(F×θ) / D≤0.573, 0.065≤D / H / FOV≤0.093, 3.697≤D / H / θ≤5.334 , 0.105≤D / H / F≤0.138, 0.304≤BFL / TTL≤0.400, 0.436≤BFL / TL≤0.667, 1.982≤F / H≤2.324, 2.147≤F / ENPD≤2 .172, 0.122≤F / ENPD / D≤0.164, 0.325≤DST / F≤0.529, 4.194≤Lb / Lf≤100.101, 1.237≤R1 / R2≤1.764, 1.642≤D / D3≤2.373、0≤L23 / TL≤0.101、0.459≤R1 / F≤1.011、0.287≤R2 / F≤0.817、0.136≤d1 / TL≤0.280、0.256≤d2 / (d1+d3)≤1.406、-5.871≤F23 / F≤-0.708、-0.844≤R8 / F≤-0.375、0.676≤F4 / F≤1.553、1.365≤F5 / F≤3.426、0.97 0≤d8 / d10≤2.550, 0.084≤d2 / TL≤0.238, 0.150≤d2 / BFL≤0.425, 0.343≤|F2 / F|≤285.178, 0.421≤|F3 / F|≤1.8 42. 1.170≤(R2+d1) / R1≤1.598, 2.214≤|d1×F23 / F5|≤20.558, 0.323≤d1 / F45≤0.841, 0.924≤|d1×F45 / F23|≤ 8.258, wherein the maximum field of view of the optical lens is FOV, the focal length of the entire group of the optical lens is F, the focal length of the second lens is F2, the focal length of the third lens is F3, the focal length of the fourth lens is F4, the focal length of the fifth lens is F5, the combined focal length of the second lens and the third lens is F23, the combined focal length of the fourth lens and the fifth lens is F45, the image height corresponding to the maximum field of view of the optical lens is H, the total optical length of the optical lens is TTL, the arc value of the maximum field of view of the optical lens is θ, the maximum clear aperture of the optical lens is DMAX, the maximum effective clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens is D, the maximum effective clear aperture of the first side surface of the second lens corresponding to the maximum field of view of the optical lens is D3, the optical back focus of the optical lens is BFL, the total lens length of the optical lens is TL, and the optical The entrance pupil diameter of the lens is ENPD, the optical lens also includes an aperture, which is located between the third lens and the fourth lens, the aperture diameter of the optical lens is DST, the distance between the first side surface of the fourth lens and the aperture along the direction of the optical axis is Lb, the distance between the second side surface of the third lens and the aperture along the direction of the optical axis is Lf, the radius of curvature of the first side surface of the first lens is R1, the radius of curvature of the second side surface of the first lens is R2, the radius of curvature of the second side surface of the fourth lens is R8, the air spacing between the second lens and the third lens on the optical axis is L23, the center thickness of the first lens on the optical axis is d1, the air spacing between the first lens and the second lens on the optical axis is d2, the center thickness of the third lens on the optical axis is d3, the center thickness of the fourth lens on the optical axis is d8, and the center thickness of the fifth lens on the optical axis is d10.

25. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 24 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images