Optical lens

Abstract

The utility model provides an optical lens. The optical lens comprises a lens barrel, a lens group and at least one spacer, the lens group and the spacer are arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence; the at least one spacer comprises a first spacer; the curvature radius R1 of the object side surface of the first lens and the outer diameter D1s of the object side surface of the first spacer meet the condition that R1 / D1s is greater than or equal to 0.37 and less than or equal to 1.26; the inner diameter d1s of the object-side surface of the first spacer, the center thickness CT1 of the first lens on the optical axis, and the radius of curvature R2 of the image-side surface of the first lens satisfy 3.80 < = d1s / (CT1 * R2) < = 7.82. The five-piece type optical lens solves the problem that stray light at the front end is increased due to the fact that a five-piece type optical lens in the prior art meets the bearing stability of the first lens.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging equipment technical field, specifically, relate to an optical lens. BACKGROUND

[0002] In the field of optical lens design and manufacture, five-piece optical lens is widely used due to its compact structure and excellent imaging performance. However, the existing five-piece optical lens has some problems in practical application. Specifically, in order to ensure the stable support of the first lens, it is usually necessary to control the relevant parameters of the first lens, such as the support relationship. However, this design, although it improves the stability of the lens to some extent, also brings new problems. The increase of the support size of the first lens is easy to produce new stray light between the lens and the element supported by it, thereby affecting the imaging quality of the optical lens.

[0003] That is, the five-piece optical lens in the prior art has the problem of increasing front-end stray light to meet the stable support of the first lens. SUMMARY

[0004] The main purpose of the utility model is to provide an optical lens to solve the problem of increasing front-end stray light to meet the stable support of the first lens in the prior art five-piece optical lens.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, an optical lens is provided, which comprises a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are sequentially arranged from the object side to the image side as the first lens, the second lens, the third lens, the fourth lens and the fifth lens; the at least one spacer comprises a first spacer arranged between the first lens and the second lens and in contact with the image side surface of the first lens; the radius of curvature R1 of the object side surface of the first lens and the outer diameter D1s of the object side surface of the first spacer satisfy: 0.37≤|R1| / D1s≤1.26; the inner diameter d1s of the object side surface of the first spacer, the center thickness CT1 of the first lens on the optical axis of the optical lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 3.80≤d1s / (CT1×R2)≤7.82.

[0006] According to another aspect of the utility model, provide a kind of optical lens, including lens barrel and the lens group and at least one spacer disposed in lens barrel, lens group is made of five lenses, five lenses are sequentially first lens, second lens, third lens, fourth lens and fifth lens from object side to image side;At least one spacer includes the first spacer between first lens and second lens and with the image side surface portion of first lens contact;The radius of curvature R1 between the object side surface of first lens and the outer diameter D1s of the object side surface of first spacer satisfies: 0.37≤|R1| / D1s≤1.26;The axial interval EP01 between the object side end surface of lens barrel and first spacer, the air interval T12 of first lens and second lens on optical axis and the effective focal length f1 of first lens satisfy: -2.18≤(EP01+T12) / f1≤-0.90.

[0007] According to another aspect of the utility model, provide a kind of optical lens, including lens barrel and the lens group and at least one spacer disposed in lens barrel, lens group is made of five lenses, five lenses are sequentially first lens, second lens, third lens, fourth lens and fifth lens from object side to image side;At least one spacer includes the third spacer between third lens and fourth lens and with the image side surface portion of third lens contact;The central thickness CT3 of third lens on optical axis, the central thickness CT2 of second lens on optical axis and the air interval T23 of second lens and third lens on optical axis satisfy: 0.65≤CT3 / (CT2+T23)≤1.37;The inner diameter d3s of the object side surface of third spacer and the radius of curvature R6 of the image side surface of third lens satisfy: -2.33≤d3s / R6≤-0.47.

[0008] Further, the axial interval EP01 between the object side end surface of lens barrel and first spacer, the air interval T12 of first lens and second lens on optical axis and the effective focal length f1 of first lens satisfy: -2.18≤(EP01+T12) / f1≤-0.90.

[0009] Further, at least one spacer also includes the second spacer between second lens and third lens and with the image side surface portion of second lens contact, the third spacer between third lens and fourth lens and with the image side surface portion of third lens contact, the central thickness CT3 of third lens, the axial interval EP23 between second spacer and third spacer and the combined focal length f23 of second lens and third lens satisfy: 0.49≤(EP23+CT3) / f23≤1.01.

[0010] Further, the at least one spacer further includes a second spacer disposed between the second lens and the third lens and in contact with the image-side surface portion of the second lens, an air interval T23 of the second lens and the third lens on the optical axis, a maximum axial thickness CP2 of the second spacer, and a maximum axial thickness CP3 of the third spacer, and the following condition is satisfied: 0.33 ≤ T23 / (CP2+CP3) ≤ 3.29.

[0011] Further, the at least one spacer further includes a second spacer disposed between the second lens and the third lens and in contact with the image-side surface portion of the second lens, a maximum axial thickness CP1 of the first spacer, an axial interval EP12 between the first spacer and the second spacer, and a central thickness CT2 of the second lens on the optical axis, and the following condition is satisfied: 0.88 ≤ (CP1+EP12) / CT2 ≤ 2.58.

[0012] Further, a radius of curvature R3 of the object-side surface of the second lens and an outer diameter D1m of the image-side surface of the first spacer satisfy the following condition: -2.65 ≤ R3 / D1m ≤ 0.26.

[0013] Further, the at least one spacer further includes a second spacer disposed between the second lens and the third lens and in contact with the image-side surface portion of the second lens, an outer diameter D2m of the image-side surface of the second spacer, and a radius of curvature R5 of the object-side surface of the third lens, and the following condition is satisfied: 1.28 ≤ D2m / |R5| ≤ 5.15.

[0014] Further, the at least one spacer further includes a third spacer disposed between the third lens and the fourth lens and in contact with the image-side surface portion of the third lens, a radius of curvature R6 of the image-side surface of the third lens, an outer diameter D3s of the object-side surface of the third spacer, and an inner diameter d3s of the object-side surface of the third spacer, and the following condition is satisfied: -3.09 ≤ (D3s-d3s) / R6 ≤ -0.84.

[0015] Further, the at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and in contact with the image-side surface portion of the fourth lens, an outer diameter D4s of the object-side surface of the fourth spacer, a radius of curvature R8 of the image-side surface of the fourth lens, and a refractive index N4 of the fourth lens, and the following condition is satisfied: 0.23 ≤ |R8×N4| / D4s ≤ 1.52.

[0016] Further, a central thickness CT5 of the fifth lens on the optical axis, a radius of curvature R9 of the object-side surface of the fifth lens, and an inner diameter d0m of the image-side end surface of the lens barrel satisfy the following condition: 0.15 ≤ |R9×CT5| / d0m ≤ 1.85.

[0017] Further, the at least one spacer further comprises a fourth spacer disposed between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, wherein an outer diameter D4m of the image side surface of the fourth spacer, an inner diameter d4m of the image side surface of the fourth spacer, a radius of curvature R10 of the image side surface of the fifth lens, and a refractive index N5 of the fifth lens satisfy: -3.04 <= (D4m-d4m) / (R10*N5) <= -1.29.

[0018] Further, the at least one spacer further comprises a third spacer disposed between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, wherein an outer diameter D3m of the image side surface of the third spacer and a radius of curvature R7 of the object side surface of the fourth lens satisfy: 0.49 <= D3m / |R7| <= 3.42.

[0019] Further, the first lens has a negative focal power, and the image side surface of the first lens is a concave surface; the fifth lens has a positive focal power, and the image side surface of the fifth lens is a convex surface.

[0020] Further, the image side surface of the second lens is a convex surface; the third lens has a positive focal power, and the image side surface of the third lens is a convex surface.

[0021] With the technical scheme, the optical lens is composed of a lens barrel, five lenses arranged in the lens barrel, and at least one spacer, the positions of the five lenses and the first spacer are arranged reasonably, and the optical lens satisfies 0.37 <= |R1| / D1s <= 1.26, which ensures the contact width of the flange position of the image side surface of the first lens, ensures the contact area of the first lens and the first spacer, and further ensures the contact stability of the first lens. However, in this case, the increase of the contact area of the first lens and the first spacer is likely to cause new stray light between the edge position of the first lens and the first spacer, thereby affecting the final imaging quality. Therefore, the application limits 3.80 <= d1s / (CT1*R2) <= 7.82, which is conducive to ensuring that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer, thereby avoiding the transmission of the stray light generated at the front end to the imaging surface, limiting the central thickness of the first lens and the radius of curvature of the image side surface of the first lens to reduce the generation of stray light, ensuring the transmission path of the imaging light of the optical lens, and further ensuring the final imaging quality of the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application. The use of these drawings in the description is only to explain the application, and should not be construed as an improper limitation of the application. In the drawings:

[0023] Figure 1A size marking drawing of the optical lens of one optional embodiment of the utility model is shown.

[0024] Figure 2 A structure schematic view of the optical lens of embodiment 1-1 of the utility model is shown.

[0025] Figure 3 A structure schematic view of the optical lens of embodiment 1-2 of the utility model is shown.

[0026] Figure 4 A structure schematic view of the optical lens of embodiment 1-3 of the utility model is shown.

[0027] Figures 5 to 8 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical lens of the embodiment one of the utility model are shown respectively.

[0028] Figure 9 A structure schematic view of the optical lens of embodiment 2-1 of the utility model is shown.

[0029] Figure 10 A structure schematic view of the optical lens of embodiment 2-2 of the utility model is shown.

[0030] Figure 11 A structure schematic view of the optical lens of embodiment 2-3 of the utility model is shown.

[0031] Figures 12 to 15 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical lens of the embodiment two of the utility model are shown respectively.

[0032] Figure 16 A structure schematic view of the optical lens of embodiment 3-1 of the utility model is shown.

[0033] Figure 17 A structure schematic view of the optical lens of embodiment 3-2 of the utility model is shown.

[0034] Figure 18 A structure schematic view of the optical lens of embodiment 3-3 of the utility model is shown.

[0035] Figures 19 to 22 The on-axis chromatic aberration curve, the astigmatism curve, the distortion curve and the magnification chromatic aberration curve of the optical lens of the embodiment three of the utility model are shown respectively.

[0036] Figure 23 And Figure 24 The optical path diagram and the stray light spot diagram of the optical lens of one optional example of the utility model when |R1| / D1s=0.37, d1s / (CT1xR2)=5.43 are shown respectively.

[0037] Figure 25 and Figure 26 The optical path diagram and the stray light spot diagram of the optical lens of one optional example are shown respectively when |R1| / D1s=0.37 and d1s / (CT1xR2)=3.61 are satisfied;

[0038] Figure 27 and Figure 28 The optical path diagram and the stray light spot diagram of the optical lens of another optional example are shown respectively when |R1| / D1s=0.37 and d1s / (CT1xR2)=8.14 are satisfied.

[0039] In the above drawings, the following reference signs are used:

[0040] P0, lens barrel; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; P1, first spacer; P2, second spacer; P3, third spacer; P4, fourth spacer. DETAILED DESCRIPTION

[0041] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0043] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0044] It should be noted that, in the present specification, the expressions first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0045] In the drawings, the thickness, size, and shape of the lenses have been exaggerated slightly for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn to scale.

[0046] In this document, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not 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 judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of the object side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. In this application, the left side is the object side, and the right side is the image side.

[0047] In order to solve the problem that the five-piece optical lens in the prior art satisfies the first lens supporting stability, resulting in increased front-end stray light, the utility model provides an optical lens.

[0048] As Figures 1 to 28 shown, in an optional embodiment of the present application, the optical lens includes a lens barrel, a lens group and at least one spacer disposed in the lens barrel, the lens group is composed of five lenses, the five lenses are sequentially the first lens, the second lens, the third lens, the fourth lens and the fifth lens from the object side to the image side; the at least one spacer includes a first spacer disposed between the first lens and the second lens and in contact with the image side surface of the first lens; the radius of curvature R1 of the object side surface of the first lens and the outer diameter D1s of the object side surface of the first spacer satisfy: 0.37≤|R1| / D1s≤1.26; the inner diameter d1s of the object side surface of the first spacer, the central thickness CT1 of the first lens on the optical axis of the optical lens and the radius of curvature R2 of the image side surface of the first lens satisfy: 3.80≤d1s / (CT1×R2)≤7.82.

[0049] The optical lens of the present application is composed of a lens barrel and five lenses and at least one spacer arranged in the lens barrel. By reasonably arranging the positions of the five lenses and the first spacer, and setting the optical lens to satisfy 0.37≤|R1| / D1s≤1.26, the flange position of the image side surface of the first lens is ensured to have a reliable width, the contact area between the first lens and the first spacer is ensured, and the stability of the first lens is further ensured. However, in this case, the increase of the contact area between the first lens and the first spacer is likely to cause new stray light between the edge position of the first lens and the first spacer, thereby affecting the final imaging quality. Therefore, by limiting 3.80≤d1s / (CT1×R2)≤7.82, it is beneficial to ensure that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer, thereby avoiding the stray light generated at the front end from being transmitted to the imaging surface. At the same time, limiting the central thickness of the first lens and the curvature radius of the image side surface of the first lens can reduce the generation of stray light, ensure the transmission path of the imaging light of the optical lens, and further ensure the final imaging quality of the optical lens.

[0050] In addition, as shown in Table 1 below, Figures 23 to 28 under the premise that the optical lens satisfies 0.37≤|R1| / D1s≤1.26, Figure 23 and Figure 24 the optical path diagram and the stray light spot diagram when the optical lens satisfies |R1| / D1s=0.37 and d1s / (CT1×R2)=5.43 are shown respectively, Figure 25 and Figure 26 the optical path diagram and the stray light spot diagram when the optical lens satisfies |R1| / D1s=0.37 and d1s / (CT1×R2)=3.61 are shown respectively, Figure 27 and Figure 28 the optical path diagram and the stray light spot diagram when the optical lens satisfies |R1| / D1s=0.37 and d1s / (CT1×R2)=8.14 are shown respectively.

[0051] By Figures 23 to 28It can be seen that when |R1| / D1s=0.37 and d1s / (CT1xR2)=5.43 are satisfied, the stray light generated at the edge of the first lens and the first spacer can be effectively intercepted by the first spacer, but will not affect the passing of the imaging light, greatly reducing the risk of stray light generated by the optical lens, and a clear image can be formed on the imaging surface. When |R1| / D1s=0.37 and d1s / (CT1xR2)=3.61 are satisfied, more reflected stray light is generated at the edge flange position of the first lens, which eventually causes the stray light to hit the imaging surface, resulting in poor performance. When |R1| / D1s=0.37 and d1s / (CT1xR2)=8.14 are satisfied, the light passes through the edge flange of the first lens and cannot be effectively intercepted by the first spacer, resulting in the generation of stray light spots on the imaging surface. As can be seen, when 0.37≤|R1| / D1s≤1.26 is satisfied, the d1s / (CT1xR2) is controlled to be within the range of 3.80 to 7.82, the stray light improvement effect of the optical lens is best. Therefore, by restricting 3.80≤d1s / (CT1xR2)≤7.82, it is ensured that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer, thereby avoiding the transmission of stray light generated at the front end to the imaging surface, while limiting the center thickness of the first lens and the curvature radius of the image side of the first lens to reduce the generation of stray light paths, ensuring the transmission path of the imaging light of the optical lens, and further ensuring the final imaging quality of the optical lens.

[0052] Table 1

[0053]

[0054] In the embodiment, the at least one spacer further includes a second spacer disposed between the second lens and the third lens and in contact with a part of the image side surface of the second lens, a third spacer disposed between the third lens and the fourth lens and in contact with a part of the image side surface of the third lens, and a fourth spacer disposed between the fourth lens and the fifth lens and in contact with a part of the image side surface of the fourth lens.

[0055] In the embodiment, the on-axis spacing EP01 between the object side end surface of the lens barrel and the first spacer, the air spacing T12 of the first lens and the second lens on the optical axis, and the effective focal length f1 of the first lens satisfy: -2.18≤(EP01+T12) / f1≤-0.90. Through the expression, the edge thickness of the first lens can be limited, and the air spacing of the first lens and the second lens on the optical axis can be limited, so that the optical sensitivity of the first lens and the second lens after assembly under high temperature and high humidity reliability test conditions can be ensured to be small, the optical performance of the optical lens can be ensured to be stable, and the possibility of stray light generated at the edge of the first lens can be reduced. At the same time, limiting f1 can ensure the accurate transmission path of the light, and ensure that the light can pass through the first lens smoothly.

[0056] In the embodiment, the central thickness CT3 of the third lens on the optical axis, the axial interval EP23 between the second spacer and the third spacer, and the combined focal length f23 of the second lens and the third lens satisfy: 0.49≤(EP23+CT3) / f23≤1.01. The edge thickness and the central thickness of the third lens can be ensured by the expression, the uniformity of the thickness of the third lens can be ensured, and the forming feasibility of the third lens can be ensured. Meanwhile, the limitation of f23 makes the combination of the second lens and the third lens meet the requirements of the transmission path of the overall optical lens.

[0057] In the embodiment, the air interval T23 of the second lens and the third lens on the optical axis, the maximum axial thickness CP2 of the second spacer, and the maximum axial thickness CP3 of the third spacer satisfy: 0.33≤T23 / (CP2+CP3)≤3.29. The reasonable distribution of the air interval of the second lens and the third lens on the optical axis, the maximum axial thickness of the second spacer, and the maximum axial thickness of the third spacer can ensure that the changes of the central thickness of the spacer and the air interval caused by the baking process in the production process of the optical lens are small, and the stability of the optical performance of the final optical lens can be ensured.

[0058] In the embodiment, the maximum axial thickness CP1 of the first spacer, the axial interval EP12 between the first spacer and the second spacer, and the central thickness CT2 of the second lens on the optical axis satisfy: 0.88≤(CP1+EP12) / CT2≤2.58. The edge thickness and the central thickness of the second lens can be ensured by the expression, and the forming feasibility of the second lens can be ensured. Meanwhile, the control of CP1 can adjust the assembly distance between the first lens and the second lens, can adjust the difference in the size of the flange position caused by the manufacturing tolerance of the second lens, and can ensure the consistency of the optical performance of each lens.

[0059] In the embodiment, the radius of curvature R3 of the object side surface of the second lens and the outer diameter D1m of the image side surface of the first spacer satisfy: -2.65≤R3 / D1m≤0.26. By the expression, the bending degree of the object side surface of the second lens can be ensured, the accurate transmission of light can be ensured, and the outer diameter of the second lens can be ensured by limiting D1m, so that the stray light rays can be reflected multiple times at the edge flange position of the lens, thereby reducing the energy threshold of the stray light path.

[0060] In the embodiment, the outer diameter D2m of the image side surface of the second spacer and the radius of curvature R5 of the object side surface of the third lens satisfy: 1.28≤D2m / |R5|≤5.15. Through the expression, the bending degree of the object side surface of the third lens is limited, the accurate transmission of the light is ensured, and the outer diameter of the third lens is ensured by limiting D2m, so that the stray light rays can be reflected multiple times at the edge flange position of the third lens, thereby reducing the energy threshold of the stray light path.

[0061] In the embodiment, the radius of curvature R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacer, and the inner diameter d3s of the object side surface of the third spacer satisfy: -3.09≤(D3s-d3s) / R6≤-0.84. Through the expression, it can be ensured that the stray light path passing through the image side surface of the third lens is intercepted by the third spacer, and the imaging quality of the optical lens is ensured. At the same time, the bearing width between the third lens and the fourth lens is ensured, and the assembly stability of the optical lens is ensured.

[0062] In the embodiment, the outer diameter D4s of the object side surface of the fourth spacer, the radius of curvature R8 of the image side surface of the fourth lens, and the refractive index N4 of the fourth lens satisfy: 0.23≤|R8×N4| / D4s≤1.52. Through the expression, the bending degree of the fourth lens can be ensured, the final optical ghost image of the optical lens meets the minimum threshold required by the design, and the outer diameter of the fifth lens can be ensured by limiting D4s, so that the optical lens finally meets the image size of the imaging chip.

[0063] In the embodiment, the central thickness CT5 of the fifth lens on the optical axis, the radius of curvature R9 of the object side surface of the fifth lens, and the inner diameter d0m of the image side end surface of the lens barrel satisfy: 0.15≤|R9×CT5| / d0m≤1.85. Through the expression, the inclination angle of the image side end surface of the lens barrel relative to the optical axis and the exit angle of the light passing through the fifth lens can be ensured, which is beneficial to prevent stray light from being generated at the image side end surface of the lens barrel, thereby avoiding the influence of stray light on the imaging quality of the optical lens.

[0064] In the embodiment, the outer diameter D4m of the image side surface of the fourth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the radius of curvature R10 of the image side surface of the fifth lens, and the refractive index N5 of the fifth lens satisfy: -3.04≤(D4m-d4m) / (R10×N5)≤-1.29. Through the expression, the face type of the image side surface of the fifth lens is ensured, the light can finally be stably converged on the imaging surface, the outer diameter and the inner diameter of the image side surface of the fourth spacer are ensured, the fourth spacer can intercept the edge stray light, and the stray light improvement effect of the optical lens is ensured.

[0065] In the embodiment, the outer diameter D3m of the image side surface of the third spacer and the radius of curvature R7 of the object side surface of the fourth lens satisfy: 0.49≤D3m / |R7|≤3.42. By the expression, the stability of the third lens in transmitting light is facilitated to be ensured, while the outer diameter of the fourth lens is limited, the abutting width between the third lens and the fourth lens is ensured, and the stability of the assembly abutment of the optical lens is ensured.

[0066] In the embodiment, the first lens has negative focal power, and the image side surface of the first lens is a concave surface; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface. By constraining the focal power and surface type of the first lens and the fifth lens, the light incidence angle and the light exit angle are controlled, the light path is planned, the light transition is ensured to be smooth, the front and rear aberrations are balanced, and the imaging quality is improved.

[0067] In the embodiment, the image side surface of the second lens is a convex surface; the third lens has positive focal power, and the image side surface of the third lens is a convex surface. By constraining the focal power and surface type of the second lens and the third lens in the middle, the light path is adjusted and controlled, the front and rear positive and negative aberrations are offset to each other, and the imaging quality is ensured.

[0068] Optionally, the optical lens in the embodiment of the application can be simulated by, for example, ZEMAX, CODEV and the like. In the process of simulation by using software and / or tools such as the above, the surface type of each lens can be simulated according to the surface type provided by the software and / or the tool used, and appropriate adjustment can be made.

[0069] In addition, in another optional embodiment of the application, an optical lens is also provided, which comprises a lens barrel, a lens set arranged in the lens barrel, and at least one spacer, the lens set is composed of five lenses, and the five lenses are sequentially a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side; the at least one spacer comprises a first spacer arranged between the first lens and the second lens and partially in contact with an image side surface of the first lens; a radius of curvature R1 of an object side surface of the first lens and an outer diameter D1s of an object side surface of the first spacer satisfy: 0.37≤|R1| / D1s≤1.26; an on-axis interval EP01 between an object side end surface of the lens barrel and the first spacer, an air interval T12 of the first lens and the second lens on an optical axis, and an effective focal length f1 of the first lens satisfy: -2.18≤(EP01+T12) / f1≤-0.90.

[0070] The optical lens of the present application is composed of a lens barrel and five lenses and at least one spacer arranged in the lens barrel. By reasonably arranging the positions of the five lenses and the first spacer, and by setting the optical lens to satisfy 0.37≤|R1| / D1s≤1.26, the contact width of the flange position of the image side surface of the first lens is ensured, the contact area of the first lens and the first spacer is ensured, and the stability of the contact of the first lens is further ensured. However, in this case, the increase of the contact area of the first lens and the first spacer is likely to cause new stray light between the edge position of the first lens and the first spacer, thereby affecting the final imaging quality. Therefore, the present application limits-2.18≤(EP01+T12) / f1≤-0.90, which can limit the edge thickness of the first lens, and at the same time limit the air gap of the first lens and the second lens on the optical axis, so as to ensure that the optical sensitivity of the first lens and the second lens under the reliability test conditions such as high temperature and high humidity is small after assembly, ensure the stability of the optical performance of the optical lens, and at the same time reduce the possibility of stray light generated at the edge of the first lens. At the same time, limiting f1 can ensure the accurate transmission path of light, and ensure that the light can pass through the first lens smoothly.

[0071] Of course, the present embodiment can also include other parameter expressions in the above embodiments, which will not be described one by one here.

[0072] In addition, in another optional embodiment of the present application, an optical lens is also provided, which comprises a lens barrel and a lens group and at least one spacer arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are sequentially the first lens, the second lens, the third lens, the fourth lens and the fifth lens from the object side to the image side; the at least one spacer includes a third spacer arranged between the third lens and the fourth lens and partially in contact with the image side surface of the third lens; the center thickness CT3 of the third lens on the optical axis, the center thickness CT2 of the second lens on the optical axis and the air gap T23 of the second lens and the third lens on the optical axis satisfy: 0.65≤CT3 / (CT2+T23)≤1.37; the inner diameter d3s of the object side surface of the third spacer and the curvature radius R6 of the image side surface of the third lens satisfy: -2.33≤d3s / R6≤-0.47.

[0073] The optical lens of the present application is composed of a lens barrel and five lenses and at least one spacer arranged in the lens barrel. By reasonably arranging the positions of the five lenses and the third spacer, and by setting the optical lens to satisfy 0.65≤CT3 / (CT2+T23)≤1.37, the proportion of the central thickness of the third lens to the sum of the central thickness of the second lens and the air gap of the second lens and the third lens on the optical axis is constrained, which is conducive to controlling the central thickness of the third lens within a reasonable range, avoiding the problem of sensitivity caused by too large difference between the central thickness and the edge thickness, and also conducive to ensuring the stable assembly of the intermediate lens in the lens barrel. However, in this case, in order to ensure the rationality of the structure of the optical lens and the performance of the optical system, the edge position of the image side of the third lens will be a certain distance away from the third spacer, thereby causing multiple reflections of light at this position, generating new stray light, and affecting the final imaging quality. Therefore, by constraining -2.33≤d3s / R6≤-0.47, the present application is conducive to increasing the cooperation stability of the third spacer and the third lens, and at the same time enabling the third spacer to effectively intercept the stray light generated at the edge position of the third lens, thereby achieving the purpose of improving the stray light and ensuring the imaging quality.

[0074] Of course, the present embodiment can also include other parameter formulas in the above-mentioned embodiments, which will not be described one by one here.

[0075] Optionally, the above-mentioned optical lens can also include a protective glass for protecting the photosensitive element located on the imaging surface.

[0076] The optical lens in the present application can adopt multiple lenses, for example, five lenses as described above. In the present application, at least one of the mirror surfaces of each lens is a non-spherical mirror surface. The characteristic of the non-spherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the non-spherical lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After adopting the non-spherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0077] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although five lenses are described as an example in the embodiments, the optical lens is not limited to including five lenses. If necessary, the optical lens can also include other numbers of lenses.

[0078] Figure 1 The size annotation diagram of one optical lens of the present application is shown, Figure 1The D4s, D3s, D1s, d3s, d1s, D1m, D2m, D3m, d4m, D4m, d0m, CP1, CP2, CP3, EP01, EP12, EP23 and the like are shown in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical lens and the surface shape of the specific lens, the parameters will not be embodied in the figure when the specific embodiments are described below.

[0079] The specific surface shape and parameters of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0080] It should be noted that there are three examples of embodiment 1-1, embodiment 1-2 and embodiment 1-3 in the following embodiment one, three examples of embodiment 2-1, embodiment 2-2 and embodiment 2-3 in the following embodiment two, and three examples of embodiment 3-1, embodiment 3-2 and embodiment 3-3 in the following embodiment three. The curvature radius, central thickness and the like of the first lens to the fifth lens of the optical lens in the three examples in the same embodiment are the same, but the thickness, inner diameter and outer diameter of the lens barrel, the first spacer to the fourth spacer are different. Or, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0081] It should be noted that any one of the following embodiment one to embodiment three is applicable to all embodiments of the present application.

[0082] Embodiment one

[0083] As shown in the following figure, Figures 2 to 8 the optical lens of embodiment one is described. Figure 2 The structure schematic diagram of the optical lens of embodiment 1-1 is shown, Figure 3 the structure schematic diagram of the optical lens of embodiment 1-2 is shown, Figure 4 the structure schematic diagram of the optical lens of embodiment 1-3 is shown.

[0084] As shown in the following figure, Figures 2 to 4 the optical lens includes a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a second auxiliary spacer P2b, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4 and a fifth lens E5 arranged in the lens barrel P0 in order from the object side to the image side along the optical axis.

[0085] As shown in the following figure, Figure 2As shown in FIG. 1, it is a structural schematic diagram of the optical lens of Example 1-1. In this example, the object side and the image side of the first spacer P1 are partially in contact with the image side S2 of the first lens and the object side S3 of the second lens, respectively. The object side and the image side of the second spacer P2 are partially in contact with the image side S4 of the second lens and the object side of the second auxiliary spacer P2b, respectively, and the image side of the second auxiliary spacer P2b is partially in contact with the object side S5 of the third lens. The object side and the image side of the third spacer P3 are partially in contact with the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and the image side of the fourth spacer P4 are partially in contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens, respectively.

[0086] As shown in FIG. 2, it is a structural schematic diagram of the optical lens of Example 1-2. In this example, the abutting contact mode of each spacer is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to, which will not be repeated here. Figure 3

[0087] As shown in FIG. 3, it is a structural schematic diagram of the optical lens of Example 1-3. In this example, the image side of the third spacer P3 is further provided with a third auxiliary spacer P3b, so that the object side and the image side of the third spacer P3 are partially in contact with the image side S6 of the third lens and the object side of the third auxiliary spacer P3b, respectively, and the image side of the third auxiliary spacer P3b is partially in contact with the object side S7 of the fourth lens. The abutting contact mode of the rest of the spacers is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to, which will not be repeated here. Figure 4 In summary, the structural parameters of the optical lens of Example 1 under Example 1-1, Example 1-2, and Example 1-3 are shown in Table 2. (unit: mm)

[0088] Table 2

[0089]

[0090]

[0091]

[0092] In Example 1, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface. The object side S3 of the second lens is a concave surface, and the image side S4 of the second lens is a convex surface. The object side S5 of the third lens is a convex surface, and the image side S6 of the third lens is a convex surface. The object side S7 of the fourth lens is a convex surface, and the image side S8 of the fourth lens is a concave surface. The object side S9 of the fifth lens is a concave surface, and the image side S10 of the fifth lens is a convex surface.

[0093] ​​In Example 1, the effective focal length f1 of the first lens is -1.36mm, the effective focal length f2 of the second lens is -17.42mm, the effective focal length f3 of the third lens is 0.78mm, the effective focal length f4 of the fourth lens is -1.68mm, and the effective focal length f5 of the fifth lens is -2.23mm.

[0094] Table 3 shows the basic structural parameters of the optical lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm). In the table below, STO indicates the aperture stop position.

[0095] Table 3

[0096]

[0097] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 to the fifth lens E5 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0098]

[0099] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 3 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1-S10 in Example 1.

[0100] Table 4

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 4.7263E-02 -1.4103E-02 1.3561E-03 -3.2204E-04 7.8632E-05 -1.6186E-05 4.1847E-06 S2 2.6518E-02 -4.8147E-03 -6.9228E-04 -2.2049E-04 -2.6146E-05 -1.2128E-06 1.1037E-06 S3 -2.2006E-02 -1.4749E-03 -1.4639E-04 -4.4726E-06 8.2775E-07 1.6929E-06 -1.1073E-07 S4 -9.2436E-02 4.6318E-03 -7.7158E-04 1.0903E-04 -8.4635E-06 7.4601E-06 -4.6558E-07 S5 -1.0531E-01 1.0415E-02 -9.2052E-04 2.2916E-04 -3.5557E-05 1.8281E-05 -5.8471E-06 S6 -1.3993E-02 3.6872E-03 -1.8065E-04 3.5096E-04 1.6770E-05 3.2548E-05 -5.5580E-06 S7 -1.5897E-01 1.1302E-02 -1.4361E-03 -3.9205E-05 9.8416E-05 -7.6127E-06 -1.5456E-05 S8 -1.3300E-01 1.6255E-02 -2.9100E-03 3.6378E-04 5.2114E-05 -6.7829E-05 1.2517E-05 S9 1.8973E-01 -1.5384E-02 -4.9606E-04 7.3696E-04 -2.4165E-04 -1.1088E-06 -6.1227E-06 S10 2.8521E-01 3.9809E-03 2.9131E-04 1.4471E-03 1.3621E-04 -5.7322E-05 1.6600E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0102] Figure 5 The on-axis chromatic aberration curve of the optical lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the imaging lens. Figure 6 The astigmatism curve of the optical lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7 The distortion curve of the optical lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different field of view angles. Figure 8 The magnification chromatic aberration curve of the optical lens of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens.

[0103] according to Figures 5 to 8 As can be seen, the optical lens given in Example 1 can achieve good imaging quality.

[0104] Example 2

[0105] As shown in Figures 9 to 15 , an optical lens of embodiment two is described. Figure 9 A structural schematic diagram of the optical lens of embodiment 2-1 is shown, Figure 10 A structural schematic diagram of the optical lens of embodiment 2-2 is shown, Figure 11 A structural schematic diagram of the optical lens of embodiment 2-3 is shown.

[0106] As shown in Figures 9 to 11 , the optical lens comprises a lens barrel P0 and, arranged in the lens barrel P0 along the optical axis from the object side to the image side in sequence, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, and a fifth lens E5.

[0107] As shown in Figure 9 , a structural schematic diagram of the optical lens of embodiment 2-1 is shown. In this example, the image side of the third spacer P3 is further provided with a third auxiliary spacer P3b. Specifically, the object side face and the image side face of the first spacer P1 are partially in contact with the image side face S2 of the first lens and the object side face S3 of the second lens respectively. The object side face and the image side face of the second spacer P2 are partially in contact with the image side face S4 of the second lens and the object side face S5 of the third lens respectively. The object side face and the image side face of the third spacer P3 are partially in contact with the image side face S6 of the third lens and the object side face of the third auxiliary spacer P3b respectively, and the image side face of the third auxiliary spacer P3b is partially in contact with the object side face S7 of the fourth lens. The object side face and the image side face of the fourth spacer P4 are partially in contact with the image side face S8 of the fourth lens and the object side face S9 of the fifth lens respectively.

[0108] As shown in Figure 10 , a structural schematic diagram of the optical lens of embodiment 2-2 is shown. In this example, the abutting contact mode of each spacer is the same as that of embodiment 2-1, and the relevant description in embodiment 2-1 can be referred to, which will not be repeated here.

[0109] As shown in Figure 11 , a structural schematic diagram of the optical lens of embodiment 2-3 is shown. In this example, the third auxiliary spacer P3b is not provided. Therefore, the object side face and the image side face of the third spacer P3 are partially in contact with the image side face S6 of the third lens and the object side face S7 of the fourth lens respectively. The abutting contact mode of the remaining spacers is the same as that of embodiment 2-1, and the relevant description in embodiment 2-1 can be referred to, which will not be repeated here.

[0110] In summary, the structural parameters of the optical lens of embodiment two under embodiment 2-1, embodiment 2-2, and embodiment 2-3 are shown in Table 5. (unit: mm)

[0111] Table 5

[0112] Parameter / Embodiment 2-1 2-2 2-3 d1s (mm) 1.412 1.432 1.411 D1s (mm) 3.739 3.551 3.780 D1m (mm) 3.739 3.551 3.780 D2m (mm) 2.097 2.538 3.380 d3s (mm) 1.092 1.539 0.936 D3s (mm) 1.811 2.238 2.980 D3m (mm) 1.835 2.259 2.980 d4m (mm) 0.431 0.432 0.429 D4s (mm) 1.797 2.238 2.580 D4m (mm) 1.797 2.238 2.580 d0m (mm) 0.935 1.332 1.070 CP1 (mm) 0.022 0.022 0.022 CP2 (mm) 0.022 0.022 0.022 CP3 (mm) 0.249 0.288 0.022 EP01 (mm) 1.165 1.018 1.207 EP12 (mm) 0.274 0.289 0.283 EP23 (mm) 0.291 0.232 0.423

[0113] In embodiment two, the object side S1 of the first lens is a concave surface, the image side S2 of the first lens is a concave surface. The object side S3 of the second lens is a convex surface, the image side S4 of the second lens is a convex surface. The object side S5 of the third lens is a concave surface, the image side S6 of the third lens is a convex surface. The object side S7 of the fourth lens is a convex surface, the image side S8 of the fourth lens is a concave surface. The object side S9 of the fifth lens is a concave surface, the image side S10 of the fifth lens is a convex surface.

[0114] In embodiment two, the effective focal length f1 of the first lens is -0.78mm, the effective focal length f2 of the second lens is 0.91mm, the effective focal length f3 of the third lens is 6.41mm, the effective focal length f4 of the fourth lens is -4.87mm, the effective focal length f5 of the fifth lens is 1.13mm.

[0115] Table 6 shows the basic structure parameter table of the optical lens of embodiment two, wherein the units of the radius of curvature, thickness / distance are millimeter mm. In the following table, STO represents the physical stop position.

[0116] Table 6

[0117]

[0118] The following table 7 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of the aspherical surfaces S1-S10 which can be used in embodiment two.

[0119] Table 7

[0120]

[0121]

[0122] Figure 12 The on-axis chromatic aberration curve of the optical lens of embodiment two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 13 The astigmatism curve of the optical lens of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 14 The distortion curve of the optical lens of embodiment two is shown, which represents the distortion size value corresponding to different field angles. Figure 15 The rate of change of magnification curve of the optical lens of embodiment two is shown, which represents the deviation of light rays on the imaging surface after passing through the optical lens.

[0123] According to Figures 12 to 15It can be seen that the optical lens given in Embodiment Two can achieve good imaging quality.

[0124] Embodiment Three

[0125] As shown in Figures 16 to 22 , the optical lens of Embodiment Three is described. Figure 16 A structural schematic diagram of the optical lens of Embodiment 3-1 is shown, Figure 17 A structural schematic diagram of the optical lens of Embodiment 3-2 is shown, Figure 18 A structural schematic diagram of the optical lens of Embodiment 3-3 is shown.

[0126] As shown in Figures 16 to 18 , the optical lens includes a lens barrel P0 and, arranged in the lens barrel P0 in order from the object side to the image side along the optical axis, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, and a fifth lens E5. The optical lens of this embodiment is of an upside-down structure, that is, the elements in the lens barrel P0 are sequentially assembled into the lens barrel P0 from the object side to the image side in order from the image side to the object side.

[0127] As shown in Figure 16 , it is a structural schematic diagram of the optical lens of Embodiment 3-1. In this example, the object side surface and the image side surface of the first spacer P1 are partially in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and the image side surface of the second spacer P2 are partially in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and the image side surface of the third spacer P3 are partially in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and the image side surface of the fourth spacer P4 are partially in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively.

[0128] As shown in Figure 17 , it is a structural schematic diagram of the optical lens of Embodiment 3-2. In this example, the abutting contact modes of the spacers are the same as those of Embodiment 3-1, and reference can be made to the related description in Embodiment 3-1, which will not be repeated here.

[0129] As shown in Figure 18 , it is a structural schematic diagram of the optical lens of Embodiment 3-3. In this example, the abutting contact modes of the spacers are the same as those of Embodiment 3-1, and reference can be made to the related description in Embodiment 3-1, which will not be repeated here.

[0130] In summary, the structural parameters of the optical lens of Embodiment Three under Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3 are shown in Table 8. (unit: mm)

[0131] Table 8

[0132]

[0133]

[0134] In embodiment three, the object side S1 of the first lens is a concave surface, the image side S2 of the first lens is a concave surface. The object side S3 of the second lens is a convex surface, the image side S4 of the second lens is a convex surface. The object side S5 of the third lens is a concave surface, the image side S6 of the third lens is a convex surface. The object side S7 of the fourth lens is a concave surface, the image side S8 of the fourth lens is a convex surface. The object side S9 of the fifth lens is a convex surface, the image side S10 of the fifth lens is a convex surface.

[0135] In embodiment three, the effective focal length f1 of the first lens is -0.62mm, the effective focal length f2 of the second lens is 1.06mm, the effective focal length f3 of the third lens is 14.64mm, the effective focal length f4 of the fourth lens is 17.30mm, the effective focal length f5 of the fifth lens is 1.03mm.

[0136] Table 9 shows the basic structure parameter table of the optical lens of embodiment three, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0137] Table 9

[0138]

[0139]

[0140] The following table 10 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of the aspherical surfaces S1-S10 which can be used in embodiment three.

[0141] Table 10

[0142] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.2901E-01 -1.9046E-02 2.9233E-03 -3.7014E-04 2.5323E-05 1.2467E-06 -3.9007E-07 S2 -2.6671E-02 7.6620E-03 -1.4484E-03 9.4665E-05 1.2280E-05 -2.2966E-06 6.6699E-08 S3 -5.2630E-02 7.0919E-03 -1.7382E-03 2.3850E-05 4.9887E-05 -2.2016E-05 1.9085E-05 S4 1.3160E-01 2.7824E-03 -1.1527E-03 -3.0379E-04 -9.3427E-06 -1.2396E-05 3.6243E-06 S5 1.4268E-01 -5.9728E-03 3.7666E-04 -6.0660E-04 3.8748E-06 -1.3314E-05 5.7788E-06 S6 6.1828E-02 2.5357E-03 2.3993E-04 -4.3011E-04 -5.5678E-05 -6.0369E-07 8.4213E-06 S7 4.4642E-02 1.3805E-03 -3.3442E-04 -1.4534E-04 8.3925E-06 -3.7978E-06 4.5718E-07 S8 1.5437E-02 5.0003E-04 -5.7772E-05 -1.2209E-05 -2.7673E-07 -4.1491E-07 8.3611E-08 S9 1.5088E-02 1.0175E-04 -2.9698E-05 -2.3061E-06 5.8974E-07 -6.5368E-08 3.9990E-08 S10 1.4415E-02 1.0001E-03 1.1600E-04 1.3450E-05 1.8243E-06 5.9403E-07 3.6513E-07 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.2043E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 5.7237E-09 -1.3462E-09 2.7265E-10 -2.5754E-11 1.0228E-12 1.3042E-14 0.0000E+00 S3 -8.8509E-06 1.7075E-06 -1.1950E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.3114E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.2579E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 7.7083E-08 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00

[0143] Figure 19 The on-axis chromatic aberration curve of the optical lens of embodiment three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the imaging lens. Figure 20 The astigmatism curve of the optical lens of embodiment three is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 21 The distortion curve of the optical lens of embodiment three is shown, which represents the distortion size value corresponding to different field angles of view. Figure 22 The rate of change of magnification curve of the optical lens of embodiment three is shown, which represents the deviation of light rays on the imaging surface after passing through the optical lens.

[0144] According to Figures 19 to 22 It can be known that the optical lens given in Embodiment Three can realize good imaging quality.

[0145] In summary, Embodiment One to Embodiment Three respectively satisfy the relationships shown in Table 11.

[0146] Table 11

[0147]

[0148]

[0149] Table 12 shows the effective focal length and the like of each lens of the optical lens of Embodiment One to Embodiment Three.

[0150] Table 12

[0151] Parameter / Embodiment One Two Three f1 (mm) -1.36 -0.78 -0.62 f2 (mm) -17.42 0.91 1.06 f3 (mm) 0.78 6.41 14.64 f4 (mm) -1.68 -4.87 17.30 f5 (mm) 2.23 1.13 1.03 f23 (mm) 0.80 0.97 1.08

[0152] The present application also provides an imaging device, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0153] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0154] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0155] It should be noted that the terms "first", "second", and the like used in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0156] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical lens characterized in that, The lens barrel comprises a lens barrel body, and a lens group and at least one spacer disposed in the lens barrel body, The lens group is composed of five lenses, which are sequentially a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side. The at least one spacer comprises a first spacer disposed between the first lens and the second lens and in partial contact with an image side surface of the first lens. A radius of curvature R1 of an object side surface of the first lens and an outer diameter D1s of an object side surface of the first spacer satisfy: 0.37≤|R1| / D1s≤1.

26. An inner diameter d1s of an object side surface of the first spacer, a central thickness CT1 of the first lens on an optical axis of the optical lens, and a radius of curvature R2 of an image side surface of the first lens satisfy: 3.80≤d1s / (CT1×R2)≤7.

82.

2. The optical lens of claim 1, wherein, An on-axis separation EP01 between an object side end surface of the lens barrel body and the first spacer, an air separation T12 of the first lens and the second lens on the optical axis, and an effective focal length f1 of the first lens satisfy: -2.18≤(EP01+T12) / f1≤-0.

90.

3. The optical lens of claim 1, wherein, The at least one spacer further comprises a second spacer disposed between the second lens and the third lens and in partial contact with an image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and in partial contact with an image side surface of the third lens, A central thickness CT3 of the third lens on the optical axis, an on-axis separation EP23 between the second spacer and the third spacer, and a combined focal length f23 of the second lens and the third lens satisfy: 0.49≤(EP23+CT3) / f23≤1.

01.

4. The optical lens of claim 1, wherein, The at least one spacer further comprises a second spacer disposed between the second lens and the third lens and in partial contact with an image side surface of the second lens, and a third spacer disposed between the third lens and the fourth lens and in partial contact with an image side surface of the third lens, An air separation T23 of the second lens and the third lens on the optical axis, a maximum axial thickness CP2 of the second spacer, and a maximum axial thickness CP3 of the third spacer satisfy: 0.33≤T23 / (CP2+CP3)≤3.

29.

5. The optical lens of claim 1, wherein, The at least one spacer further comprises a second spacer disposed between the second lens and the third lens and in partial contact with an image side surface of the second lens, A maximum axial thickness CP1 of the first spacer, an on-axis separation EP12 between the first spacer and the second spacer, and a central thickness CT2 of the second lens on the optical axis satisfy: 0.88≤(CP1+EP12) / CT2≤2.

58.

6. The optical lens of claim 1, wherein, A radius of curvature R3 of an object side surface of the second lens and an outer diameter D1m of an image side surface of the first spacer satisfy: -2.65≤R3 / D1m≤0.

26.

7. The optical lens of claim 1, wherein, The at least one spacer further includes a second spacer disposed between the second lens and the third lens and in contact with a part of an image-side surface of the second lens, An outer diameter D2m of the image-side surface of the second spacer and a curvature radius R5 of an object-side surface of the third lens satisfy: 1.28≤D2m / |R5|≤5.

15.

8. The optical lens of claim 1, wherein, The at least one spacer further includes a third spacer disposed between the third lens and the fourth lens and in contact with a part of an image-side surface of the third lens, A curvature radius R6 of the image-side surface of the third lens, an outer diameter D3s of an object-side surface of the third spacer, and an inner diameter d3s of the object-side surface of the third spacer satisfy: -3.09≤(D3s-d3s) / R6≤-0.

84.

9. The optical lens of claim 1, wherein, The at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and in contact with a part of an image-side surface of the fourth lens, An outer diameter D4s of an object-side surface of the fourth spacer, a curvature radius R8 of the image-side surface of the fourth lens, and a refractive index N4 of the fourth lens satisfy: 0.23≤|R8×N4| / D4s≤1.

52.

10. The optical lens of claim 1, wherein, A central thickness CT5 of the fifth lens on the optical axis, a curvature radius R9 of an object-side surface of the fifth lens, and an inner diameter d0m of an image-side end surface of the lens barrel satisfy: 0.15≤|R9×CT5| / d0m≤1.

85.

11. The optical lens of claim 1, wherein, The at least one spacer further includes a fourth spacer disposed between the fourth lens and the fifth lens and in contact with a part of an image-side surface of the fourth lens, An outer diameter D4m of an image-side surface of the fourth spacer, an inner diameter d4m of the image-side surface of the fourth spacer, a curvature radius R10 of the image-side surface of the fifth lens, and a refractive index N5 of the fifth lens satisfy: -3.04≤(D4m-d4m) / (R10×N5)≤-1.

29.

12. The optical lens of claim 1, wherein, The at least one spacer further includes a third spacer disposed between the third lens and the fourth lens and in contact with a part of an image-side surface of the third lens, An outer diameter D3m of the image-side surface of the third spacer and a curvature radius R7 of an object-side surface of the fourth lens satisfy: 0.49≤D3m / |R7|≤3.

42.

13. The optical lens of any of claims 1 to 12, wherein, The first lens has a negative focal power, and an image-side surface of the first lens is concave; the fifth lens has a positive focal power, and an image-side surface of the fifth lens is convex.

14. The optical lens of any of claims 1 to 12, wherein, An image-side surface of the second lens is convex; the third lens has a positive focal power, and an image-side surface of the third lens is convex.

Images