Optical lens

Abstract

The invention 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 optical lens solves the problem that stray light at the front end is increased due to the fact that a five-piece optical lens in the prior art meets the bearing stability of the first lens.

Description

Technical Field

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

[0002] In the field of optical lens design and manufacturing, five-piece optical lenses are widely used due to their compact structure and excellent imaging performance. However, existing five-piece optical lenses have some problems in practical applications. Specifically, in order to ensure the stability of the support of the first lens, it is usually necessary to control the relevant parameters of the first lens, such as the support relationship. However, although this design improves the stability of the lens to a certain extent, it also brings new problems. The increase in the support size of the first lens easily causes new stray light to be generated between the lens and the element it supports, thereby affecting the imaging quality of the optical lens.

[0003] That is to say, the five-lens optical lens in the prior art has the problem of increasing front-end stray light due to the lack of support stability of the first lens. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens to solve the problem of the five-lens optical lens in the prior art that the bearing stability of the first lens increases the front stray light.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and at least one spacer arranged in the lens barrel, wherein the lens group consists of five lenses, and the five lenses are, from the object side to the image side, 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 placed between the first lens and the second lens and in contact with the image side portion of the first lens; 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 satisfy the following relationship: 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 curvature radius R2 of the image side surface of the first lens satisfy the following relationship: 3.80≤d1s / (CT1×R2)≤7.82.

[0006] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and at least one spacer arranged in the lens barrel, wherein the lens group consists of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence; at least one spacer comprises a first spacer placed between the first lens and the second lens and partially in contact with the image side surface of the first lens; a radius of curvature R1 of the object side surface of the first lens and an outer diameter D1s of the object side surface of the first spacer satisfy the following: 0.37≤|R1| / D1s≤1.26; an on-axis spacing EP01 between the object side end surface of the lens barrel and the first spacer, an air spacing T12 between the first lens and the second lens on the optical axis, and an effective focal length f1 of the first lens satisfy the following: -2.18≤(EP01+T12) / f1≤-0.90.

[0007] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and at least one spacer arranged in the lens barrel, wherein the lens group consists of five lenses, and the five lenses are, from the object side to the image side, 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 third spacer disposed between the third lens and the fourth lens and in contact with the image side portion 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 between 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.

[0008] Further, the on-axis interval EP01 between the object side end surface of the lens barrel and the first spacer, the air interval T12 between 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.

[0009] Furthermore, at least one spacer also includes a second spacer placed between the second lens and the third lens and in contact with the image side portion of the second lens, and a third spacer placed between the third lens and the fourth lens and in contact with the image side portion of the third lens. The center thickness CT3 of the third lens on the optical axis, the axial spacing 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.

[0010] Furthermore, at least one spacer also includes a second spacer placed between the second lens and the third lens and in contact with the image side portion of the second lens, and a third spacer placed between the third lens and the fourth lens and in contact with the image side portion of the third lens. The air gap T23 between 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.

[0011] Furthermore, at least one spacer also includes a second spacer placed between the second lens and the third lens and in contact with the image side portion of the second lens, and the maximum axial thickness CP1 of the first spacer, the axial spacing EP12 between the first spacer and the second spacer, and the center thickness CT2 of the second lens on the optical axis satisfy: 0.88≤(CP1+EP12) / CT2≤2.58.

[0012] Furthermore, a curvature radius 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: -2.65≤R3 / D1m≤0.26.

[0013] Furthermore, at least one spacer also includes a second spacer placed between the second lens and the third lens and partially in contact with the image side surface of the second lens, and the outer diameter D2m of the image side surface of the second spacer and the curvature radius R5 of the object side surface of the third lens satisfy: 1.28≤D2m / |R5|≤5.15.

[0014] Furthermore, the at least one spacer also includes a third spacer placed between the third lens and the fourth lens and partially in contact with the image side surface of the third lens, and the curvature radius 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.

[0015] Furthermore, at least one spacer also includes a fourth spacer placed between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and an outer diameter D4s of the 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.

[0016] Further, the central thickness CT5 of the fifth lens on the optical axis, the curvature radius 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.

[0017] Further, at least one spacer also includes a fourth spacer placed between the fourth lens and the fifth lens and partially in contact with the image side surface of the fourth lens, and 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 curvature radius 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.

[0018] Furthermore, at least one spacer also includes a third spacer placed between the third lens and the fourth lens and partially in contact with the image side surface of the third lens, and the outer diameter D3m of the image side surface of the third spacer and the curvature radius R7 of the object side surface of the fourth lens satisfy: 0.49≤D3m / |R7|≤3.42.

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

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

[0021] By applying the technical solution of the present invention, the optical lens of the present application is composed of a lens barrel, five lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the positions of the five lenses and the first spacer, and setting the optical lens to meet 0.37≤|R1| / D1s≤1.26, the bearing width of the flange position of the image side of the first lens is guaranteed, the contact area between the first lens and the first spacer is guaranteed, and the bearing stability of the first lens is further guaranteed. However, in this case, the increase in the contact area between the first lens and the first spacer is likely to cause new stray light to be generated between the edge position of the first lens and the first spacer, thereby affecting the final imaging quality. Therefore, the present application is conducive to ensuring that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer by constraining 3.80≤d1s / (CT1×R2)≤7.82, thereby avoiding the stray light generated at the front end from being transmitted to the imaging surface. At the same time, limiting the center thickness of the first lens and the radius of curvature of the image side of the first lens can reduce the generation of the stray light path, ensure the transmission path of the imaging light of the optical lens, and then ensure the final imaging quality of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 A dimensioning diagram of an optical lens of an optional embodiment of the present invention is shown;

[0024] Figure 2 A schematic structural diagram of an optical lens according to Embodiment 1-1 of the present invention is shown;

[0025] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 1-2 of the present invention is shown;

[0026] Figure 4 A schematic diagram showing the structure of an optical lens according to embodiments 1 to 3 of the present invention is shown;

[0027] Figures 5 to 8 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical lens of the first embodiment of the present invention are respectively shown;

[0028] Fig. 9 A schematic structural diagram of an optical lens according to Embodiment 2-1 of the present invention is shown;

[0029] Fig.10 A schematic structural diagram of an optical lens according to Embodiment 2-2 of the present invention is shown;

[0030] Fig.11 A schematic structural diagram of an optical lens according to Embodiment 2-3 of the present invention is shown;

[0031] Figures 12 to 15 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical lens of the second embodiment of the present invention are respectively shown;

[0032] Fig.16 A schematic structural diagram of an optical lens according to Embodiment 3-1 of the present invention is shown;

[0033] Fig.17 A schematic structural diagram of an optical lens according to Embodiment 3-2 of the present invention is shown;

[0034] Fig.18 A schematic structural diagram of an optical lens according to Embodiment 3-3 of the present invention is shown;

[0035] Figures 19 to 22 The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical lens of the third embodiment of the present invention are respectively shown;

[0036] Fig.23 and Fig.24 The optical path diagram and the stray light spot diagram of an optional example of the optical lens of the present invention are respectively shown when |R1| / D1s=0.37 and d1s / (CT1×R2)=5.43;

[0037] Fig.25 and Fig.26The optical path diagram and stray light spot diagram of an optional example optical lens are respectively shown when |R1| / D1s=0.37 and d1s / (CT1×R2)=3.61;

[0038] Fig. 27 and Fig.28 The optical path diagram and stray light spot diagram of another optional example of an optical lens satisfying |R1| / D1s=0.37 and d1s / (CT1×R2)=8.14 are respectively shown.

[0039] The above drawings include the following reference numerals:

[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, 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0046] In this article, the paraxial area refers to the area 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 area; 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 area. The judgment of the surface shape in the paraxial area 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 area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the object 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 image 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. In the present application, the left side is the object side and the right side is the image side.

[0047] In order to solve the problem in the prior art that the five-lens optical lens has the problem of increasing front-end stray light due to the lack of support stability of the first lens, the present invention provides an optical lens.

[0048] like Figures 1 to 28 As shown, in an optional embodiment of the present application, the optical lens includes a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group consists of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens in order; at least one spacer includes a first spacer placed between the first lens and the second lens and in contact with the image side portion of the first lens; 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 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 curvature radius 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, five lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the positions of the five lenses and the first spacer, and setting the optical lens to meet 0.37≤|R1| / D1s≤1.26, the bearing width of the flange position of the image side of the first lens is guaranteed, the contact area between the first lens and the first spacer is guaranteed, and the bearing stability of the first lens is further guaranteed. However, in this case, the increase in the contact area between the first lens and the first spacer is likely to cause new stray light to be generated between the edge position of the first lens and the first spacer, thereby affecting the final imaging quality. Therefore, the present application is conducive to ensuring that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer by constraining 3.80≤d1s / (CT1×R2)≤7.82, thereby avoiding the stray light generated at the front end from being transmitted to the imaging surface. At the same time, limiting the center thickness of the first lens and the radius of curvature of the image side of the first lens can reduce the generation of the stray light path, ensure the transmission path of the imaging light of the optical lens, and then ensure the final imaging quality of the optical lens.

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

[0051] Depend on Figure 23 to Figure 28It can be seen that when |R1| / D1s=0.37 and d1s / (CT1×R2)=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 passage of imaging light, greatly reducing the risk of stray light generated by the optical lens, and can form a clear image on the imaging surface. When |R1| / D1s=0.37 and d1s / (CT1×R2)=3.61 are satisfied, the light generates more reflected stray light 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 / (CT1×R2)=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. It can be seen that when 0.37≤|R1| / D1s≤1.26 is satisfied, and d1s / (CT1×R2) is controlled within the range of 3.80 to 7.82, the stray light improvement effect of the optical lens is optimal. Therefore, the present application ensures that the stray light generated between the first lens and the first spacer can be intercepted by the first spacer by constraining 3.80≤d1s / (CT1×R2)≤7.82, thereby preventing the stray light generated at the front end from being transmitted to the imaging surface. At the same time, limiting the center thickness of the first lens and the curvature radius of the image side surface of the first lens can reduce the generation of the stray light path, ensure the transmission path of the imaging light of the optical lens, and thus ensure the final imaging quality of the optical lens.

[0052] Table 1

[0053] Example 1 Example 2 Example 3 Conditional expression d1s / (CT1×R2)=5.43 d1s / (CT1×R2)=3.61 d1s / (CT1×R2)=8.14 Light path diagram Fig.23 Fig.25 Fig. 27 Stray light spot diagram Fig.24 Fig.26 Fig.28

[0054] In this embodiment, the at least one spacer also includes a second spacer placed between the second lens and the third lens and in contact with the image side portion of the second lens, a third spacer placed between the third lens and the fourth lens and in contact with the image side portion of the third lens, and a fourth spacer placed between the fourth lens and the fifth lens and in contact with the image side portion of the fourth lens.

[0055] In this embodiment, the on-axis spacing EP01 between the object side end face of the lens barrel and the first spacer, the air spacing T12 between 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. This expression can limit the edge thickness of the first lens, and at the same time limit the air spacing between the first lens and the second lens on the optical axis, which can ensure that the optical sensitivity of the first lens and the second lens under the reliability experimental conditions such as high temperature and high humidity after assembly is small, ensure the optical performance of the optical lens is stable, and reduce the possibility of stray light generated by 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 smoothly through the first lens.

[0056] In this embodiment, the center thickness CT3 of the third lens on the optical axis, the on-axis spacing 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. This expression can ensure the edge thickness and center thickness of the third lens, ensure the uniform thickness of the third lens, and ensure the feasibility of molding the third lens. At the same time, limiting f23 makes the combination of the second lens and the third lens meet the transmission path requirements of the overall optical lens.

[0057] In this embodiment, the air gap T23 between 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 the following: 0.33≤T23 / (CP2+CP3)≤3.29. By using this expression to reasonably allocate the air gap between the second lens and the third lens on the optical axis and the maximum axial thickness of the second spacer and the third spacer, it is possible to ensure that the center thickness of the spacer and the air gap change less due to the baking process during the production of the optical lens, thereby ensuring the stability of the optical performance of the final optical lens.

[0058] In this embodiment, the maximum axial thickness CP1 of the first spacer, the axial spacing EP12 between the first spacer and the second spacer, and the center thickness CT2 of the second lens on the optical axis satisfy: 0.88≤(CP1+EP12) / CT2≤2.58. This expression can ensure the edge thickness and center thickness of the second lens, and ensure the molding feasibility of the second lens. At the same time, by controlling CP1, the assembly distance between the first lens and the second lens can be adjusted, and the difference in the flange surface position size caused by the manufacturing tolerance of the second lens can be adjusted, so as to ensure the consistency of the optical performance of each lens.

[0059] In this embodiment, the curvature radius 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. Through this expression, the curvature degree of the object side surface of the second lens can be guaranteed, and the accurate transmission of light can be guaranteed. At the same time, limiting D1m guarantees the outer diameter of the second lens, and ensures that the stray light 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 this embodiment, the outer diameter D2m of the image side surface of the second spacer and the curvature radius R5 of the object side surface of the third lens satisfy: 1.28≤D2m / |R5|≤5.15. Through this expression, the curvature degree of the object side surface of the third lens is limited, ensuring the accurate transmission of light, while limiting D2m ensures the outer diameter of the third lens, ensuring that the stray light 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 this embodiment, the curvature radius 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 this 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, thereby ensuring the imaging quality of the optical lens. At the same time, the supporting width between the third lens and the fourth lens is ensured, thereby ensuring the assembly stability of the optical lens.

[0062] In this embodiment, the outer diameter D4s of the object side of the fourth spacer, the curvature radius R8 of the image side of the fourth lens and the refractive index N4 of the fourth lens satisfy: 0.23≤|R8×N4| / D4s≤1.52. Through this expression, the curvature degree of the fourth lens can be guaranteed, and the final optical ghost image of the optical lens can meet the minimum threshold of the design requirements. At the same time, D4s is limited to ensure that the outer diameter of the fifth lens can be guaranteed, and the optical lens can finally meet the image plane size of the imaging chip.

[0063] In this embodiment, the central thickness CT5 of the fifth lens on the optical axis, the curvature radius R9 of the object side of the fifth lens and the inner diameter d0m of the image side end face of the lens barrel satisfy: 0.15≤|R9×CT5| / d0m≤1.85. Through this expression, the inclination angle of the image side end face of the lens barrel relative to the optical axis and the exit angle of the light passing through the fifth lens can be guaranteed, which is conducive to preventing stray light from generating stray light on the image side end face of the lens barrel, thereby avoiding stray light from affecting the imaging quality of the optical lens.

[0064] In this 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 curvature radius 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 this expression, the surface shape of the image side surface of the fifth lens is guaranteed, and the light can be finally stably converged on the imaging surface. At the same time, the outer diameter and inner diameter of the image side surface of the fourth spacer are guaranteed, and the fourth spacer can intercept the edge stray light, and the stray light improvement effect of the optical lens is guaranteed.

[0065] In this embodiment, the outer diameter D3m of the image side surface of the third spacer and the curvature radius R7 of the object side surface of the fourth lens satisfy: 0.49≤D3m / |R7|≤3.42. This expression is conducive to ensuring the stability of the light transmitted by the third lens, while limiting the outer diameter of the fourth lens, ensuring the supporting width between the third lens and the fourth lens, and ensuring the stability of the assembly support of the optical lens.

[0066] In this embodiment, the first lens has negative power, and the image side of the first lens is concave; the fifth lens has positive power, and the image side of the fifth lens is convex. By constraining the power and surface shape of the first lens and the fifth lens, it is helpful to control the incident angle and the exit angle of the light, and it is also helpful to plan the light trend, ensure the smooth transition of the light, and balance the front and rear aberrations, improve the distortion, and ensure the imaging quality.

[0067] In this embodiment, the image side surface of the second lens is convex; the third lens has positive optical power, and the image side surface of the third lens is convex. By constraining the optical power and surface shape of the second lens and the third lens in the middle, it is helpful to control the light trend, so that the positive and negative aberrations of the front and back cancel each other out, and ensure the imaging quality.

[0068] Optionally, the optical lens in the embodiments of the present application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. In the process of simulation using the above software and / or tools, the surface profile of each lens can be simulated and appropriately adjusted according to the surface profile of the software and / or tools used.

[0069] In addition, in another optional embodiment of the present application, an optical lens is also provided, including a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group consists of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens in order; at least one spacer includes a first spacer placed between the first lens and the second lens and partially in contact with the image side surface of the first lens; 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 satisfy: 0.37≤|R1| / D1s≤1.26; the on-axis spacing EP01 between the object side end surface of the lens barrel and the first spacer, the air spacing T12 between 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.

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

[0071] Of course, this embodiment may also include other parameter formulas in the above embodiment, 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, including a lens barrel, a lens group and at least one spacer arranged in the lens barrel, the lens group consists of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens in order; at least one spacer includes a third spacer placed between the third lens and the fourth lens and in contact with the image side portion 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 between 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, five lenses arranged in the lens barrel, and at least one spacer. By reasonably arranging the positions of the five lenses and the third spacer, and setting the optical lens to meet 0.65≤CT3 / (CT2+T23)≤1.37, the center thickness of the third lens is constrained to account for the center thickness of the second lens and the ratio of the sum of the air intervals of the second lens and the third lens on the optical axis, which is conducive to controlling the center thickness of the third lens within a reasonable range, avoiding the sensitivity problem caused by the excessive difference between the center thickness and the edge thickness, and at the same time, it is conducive to ensuring the stable assembly of the intermediate lens in the lens barrel. However, in this case, in order to ensure the structural rationality of the optical lens and the performance of the optical system, the edge position of the image side of the third lens will have a certain distance from the third spacer, thereby causing the light to be reflected multiple times at this position, generating new stray light, and affecting the final imaging quality. Therefore, the present application is conducive to increasing the coordination stability of the third spacer and the third lens by constraining -2.33≤d3s / R6≤-0.47, and at the same time, the third spacer can effectively intercept the stray light generated by the edge position of the third lens, thereby achieving the purpose of improving the stray light and ensuring the imaging quality.

[0074] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0075] Optionally, the optical lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0076] 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 characteristics of an aspherical lens are: 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 using an aspherical 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, 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.

[0078] Figure 1 A schematic diagram of the dimension marking of an optical lens of the present application is shown. Figure 1Parameters such as D4s, D3s, D1s, d3s, d1s, D1m, D2m, D3m, d4m, D4m, d0m, CP1, CP2, CP3, EP01, EP12, and EP23 are indicated 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, these parameters will no longer be reflected in the drawings when the specific embodiments are described later.

[0079] 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.

[0080] It should be noted that in the following embodiment 1, there are three examples of embodiment 1-1, embodiment 1-2, and embodiment 1-3; in embodiment 2, there are three examples of embodiment 2-1, embodiment 2-2, and embodiment 2-3; and in embodiment 3, there are three examples of embodiment 3-1, embodiment 3-2, and embodiment 3-3. In the three examples of the same embodiment, the parameters such as the radius of curvature, center thickness, and the spacing distance between lenses and the coefficient of high-order terms of the optical lens are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel and the first to fourth spacers are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0081] It should be noted that any one of the following examples 1 to 3 is applicable to all implementation methods of the present application.

[0082] Embodiment 1

[0083] like Figures 2 to 8 As shown, the optical lens of embodiment 1 is described. Figure 2 The structure diagram of the optical lens of Example 1-1 is shown. Figure 3 The structure diagram of the optical lens of Embodiment 1-2 is shown. Figure 4 The schematic diagrams of the structures of the optical lenses of Examples 1-3 are shown.

[0084] like Figures 2 to 4 As shown, 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 which are arranged in sequence in the lens barrel P0 from the object side to the image side along the optical axis.

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

[0086] like Figure 3 , which is a schematic diagram of the structure of the optical lens of Example 1-2. In this example, the supporting and abutting manner of each spacer is the same as that of Example 1-1, and the relevant description in Example 1-1 may be referred to, and will not be repeated here.

[0087] like Figure 4 As shown, it is a schematic diagram of the structure of the optical lens of Example 1-3. In this example, the image side of the third spacer P3 is also provided with a third auxiliary spacer P3b, so the object side and image side of the third spacer P3 are respectively in contact with the image side S6 of the third lens and the object side of the third auxiliary spacer P3b, and the image side of the third auxiliary spacer P3b is in contact with the object side S7 of the fourth lens. The bearing and abutment mode of the remaining spacers is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to, and it will not be repeated here.

[0088] In summary, the structural parameters of the optical lens of Example 1 in Example 1-1, Example 1-2, and Example 1-3 are shown in Table 2. (Unit: mm)

[0089] Table 2

[0090]

[0091]

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

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

[0094] Table 3 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all in millimeters. In the following table, STO represents the aperture position.

[0095] Table 3

[0096]

[0097] In the first embodiment, the object side surface and the image side surface of the first lens E1 to the fifth lens E5 are all aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0098]

[0099] Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in Table 3 above; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 4 below gives the high-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 surface 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 axial chromatic aberration curve of the optical lens of the first embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the imaging lens. Figure 6 The astigmatism curve of the optical lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 7 The distortion curve of the optical lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 8 The magnification chromatic aberration curve of the optical lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0103] according to Figures 5 to 8 It can be seen that the optical lens provided in the first embodiment can achieve good imaging quality.

[0104] Embodiment 2

[0105] like Figures 9 to 15 As shown, the optical lens of the second embodiment is described. Fig. 9 The structure diagram of the optical lens of Example 2-1 is shown. Fig.10 FIG. 2 shows a schematic structural diagram of an optical lens of Example 2-2. Fig.11 A schematic structural diagram of the optical lens of Example 2-3 is shown.

[0106] like Figures 9 to 11 As shown, 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 third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4 and a fifth lens E5 which are sequentially arranged in the lens barrel P0 along the optical axis from the object side to the image side.

[0107] like Fig. 9 , which is a structural schematic diagram of the optical lens of Example 2-1. In this example, the image side of the third spacer P3 is also provided with a third auxiliary spacer P3b. Specifically, the object side and 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 image side of the second spacer P2 are partially in contact with the image side S4 of the second lens and the object side S5 of the third lens, respectively. The object side and 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 object side and 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.

[0108] like Fig.10 , which is a schematic diagram of the structure of the optical lens of Example 2-2. In this example, the supporting and abutting manner of each spacer is the same as that of Example 2-1, and the relevant description in Example 2-1 may be referred to, and will not be repeated here.

[0109] like Fig.11 , which is a schematic diagram of the structure of the optical lens of Example 2-3. In this example, the third auxiliary spacer P3b is not provided. Therefore, the object side and image side of the third spacer P3 are in partial contact with the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The abutment mode of the remaining spacers is the same as that of Example 2-1, and the relevant description in Example 2-1 can be referred to, and no further description is given here.

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

[0111] Table 5

[0112] Parameters / Examples 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 the second embodiment, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a convex surface. The object side surface S5 of the third lens is a concave surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a concave surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface.

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

[0115] Table 6 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all in millimeters. In the following table, STO represents the physical aperture position.

[0116] Table 6

[0117]

[0118] Table 7 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 the aspherical mirror surfaces S1-S10 in Example 2.

[0119] Table 7

[0120]

[0121]

[0122] Fig.12 The axial chromatic aberration curve of the optical lens of the second embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the imaging lens. Fig.13 The astigmatism curve of the optical lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14 The distortion curve of the optical lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.15 The magnification chromatic aberration curve of the optical lens of the second embodiment is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0123] according to Figures 12 to 15It can be seen that the optical lens provided in the second embodiment can achieve good imaging quality.

[0124] Embodiment 3

[0125] like Figures 16 to 22 As shown, the optical lens of embodiment 3 is described. Fig.16 The structure diagram of the optical lens of Example 3-1 is shown. Fig.17 FIG. 3 is a schematic diagram showing the structure of the optical lens of Example 3-2. Fig.18 A schematic structural diagram of the optical lens of Example 3-3 is shown.

[0126] like Figures 16 to 18 As shown, the optical lens comprises a lens barrel P0 and 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 which are arranged in sequence in the lens barrel P0 from the object side to the image side along the optical axis. The optical lens of this embodiment is a flip-chip structure, that is, the elements in the lens barrel P0 are assembled in sequence from the object side of the lens barrel P0 in the order from the image side to the object side.

[0127] like Fig.16 , which is a schematic diagram of the structure of the optical lens of Example 3-1. In this example, the object side and 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 image side of the second spacer P2 are partially in contact with the image side S4 of the second lens and the object side S5 of the third lens, respectively. The object side and 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 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.

[0128] like Fig.17 , which is a schematic diagram of the structure of the optical lens of Example 3-2. In this example, the supporting and abutting manner of each spacer is the same as that of Example 3-1, and the relevant description in Example 3-1 may be referred to, and will not be repeated here.

[0129] like Fig.18 , which is a schematic diagram of the structure of the optical lens of Example 3-3. In this example, the supporting and abutting manner of each residual spacer is the same as that of Example 3-1, and the relevant description in Example 3-1 may be referred to, and will not be repeated here.

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

[0131] Table 8

[0132]

[0133]

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

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

[0136] Table 9 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0137] Table 9

[0138]

[0139]

[0140] Table 10 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 surface S1-S10 in Example 3.

[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] Fig.19 The axial chromatic aberration curve of the optical lens of the third embodiment is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the imaging lens. Fig. 20 The astigmatism curve of the optical lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.21 The distortion curve of the optical lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig. 22 The magnification chromatic aberration curve of the optical lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens.

[0144] according to Figures 19 to 22 It can be seen that the optical lens provided in the third embodiment can achieve good imaging quality.

[0145] In summary, Embodiment 1 to Embodiment 3 respectively satisfy the relationship shown in Table 11.

[0146] Table 11

[0147]

[0148]

[0149] Table 12 shows the effective focal length of each lens of the optical lens of Examples 1 to 3.

[0150] Table 12

[0151] Parameters / Examples 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, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can 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 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 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.

[0154] 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.

[0155] 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.

[0156] 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: comprising a lens barrel, a lens group and at least one spacer disposed in the lens barrel, The lens group is composed of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens; 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 portion of the first lens; 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 satisfy the following: 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 curvature radius R2 of the image side surface of the first lens satisfy: 3.80≤d1s / (CT1×R2)≤7.

82.

2. The optical lens according to claim 1, characterized in that: The on-axis interval EP01 between the object-side end surface of the lens barrel and the first spacer, the air interval T12 between 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.

3. The optical lens according to claim 1, characterized in that: 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, and 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. 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.

4. The optical lens according to claim 1, characterized in that: 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, and 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. An air gap T23 between 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 the following: 0.33≤T23 / (CP2+CP3)≤3.

29.

5. The optical lens according to claim 1, characterized in that: 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, The maximum axial thickness CP1 of the first spacer, the axial interval EP12 between the first spacer and the second spacer, and the center thickness CT2 of the second lens on the optical axis satisfy: 0.88≤(CP1+EP12) / CT2≤2.

58.

6. The optical lens according to claim 1, characterized in that: A curvature radius 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: -2.65≤R3 / D1m≤0.

26.

7. The optical lens according to claim 1, characterized in that: 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 curvature radius R5 of the object-side surface of the third lens satisfy the following relationship: 1.28≤D2m / |R5|≤5.

15.

8. The optical lens according to claim 1, characterized in that: 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 curvature radius 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 satisfy the following: -3.09≤(D3s-d3s) / R6≤-0.

84.

9. The optical lens according to claim 1, characterized in that: 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 curvature radius R8 of the image-side surface of the fourth lens, and a refractive index N4 of the fourth lens satisfy the following relationship: 0.23≤|R8×N4| / D4s≤1.

52.

10. The optical lens according to claim 1, characterized in that: The central thickness CT5 of the fifth lens on the optical axis, the curvature radius 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 the following: 0.15≤|R9×CT5| / d0m≤1.

85.

11. The optical lens according to claim 1, characterized in that: 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, 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 curvature radius 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.

12. The optical lens according to claim 1, characterized in that: 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, An outer diameter D3m of the image-side surface of the third spacer and a curvature radius R7 of the object-side surface of the fourth lens satisfy the following relationship: 0.49≤D3m / |R7|≤3.

42.

13. The optical lens according to any one of claims 1 to 12, characterized in that: The first lens has negative optical power, and the image side surface of the first lens is a concave surface; the fifth lens has positive optical power, and the image side surface of the fifth lens is a convex surface.

14. The optical lens according to any one of claims 1 to 12, characterized in that: The image side surface of the second lens is a convex surface; the third lens has positive optical power, and the image side surface of the third lens is a convex surface.

Images