Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel and first to seventh lenses arranged in the lens barrel. The spacing element group at least comprises a first spacing element, a second spacing element and a third spacing element; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacing element and the spacing distance EP12 between the first spacing element and the second spacing element meet the following condition: f2 / (CP1 + EP12) is more than or equal to 19.39 and less than or equal to 31.5; the effective focal length f3 of the third lens, the spacing distance EP23 between the second spacing element and the third spacing element meet the condition that f3 / (EP2 + CT3) is larger than or equal to-23.63 and smaller than or equal to-11.26, and the central thickness CT3 of the third lens on the optical axis meets the condition that f3 / (EP2 + CT3) is smaller than or equal to-11.26. The optical lens solves the problem that stray light is easy to generate when the assembling stability of the front-end lens is improved in the prior art.

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] As more and more electronic devices have camera functions and mobile electronic devices are constantly updated, the optical lenses are constantly upgraded. With the continuous increase in the memory of electronic devices and people's ultimate pursuit of photo quality, high definition and high picture cleanliness have become a strong demand of end-user customers, but the requirements of high pixels and large image surfaces have led to an increasing number of optical lenses, more and more mechanisms and components for support and installation, and more and more components that can generate stray light. For an optical lens composed of multiple lenses, the front and rear assembly stability of the optical lens is crucial to the entire optical system. In some lenses, stray light is easily generated in order to improve the assembly stability of the front lens of the optical lens.

[0003] That is to say, the optical lens in the prior art has the problem of easily generating stray light when improving the stability of the front lens assembly. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens to solve the problem in the prior art that stray light is easily generated when improving the stability of the front lens assembly.

[0005] In order to achieve the above-mentioned object, according to one aspect of the present invention, an optical lens is provided, comprising a lens barrel, and a lens group and a spacer element group arranged in the lens barrel, wherein the lens group is composed of seven lenses, and the lens group includes, from the object side to the image side, a first lens, a second lens with positive focal length, a third lens with negative focal length, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence along the optical axis direction; the spacer element group includes at least a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and is in contact with the image side surface of the first lens, The image side surfaces of the two lenses are partially in contact, the third spacer element is located between the third lens and the fourth lens and is partially in contact with the image side surface of the third lens; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element satisfy the following: 19.39≤f2 / (CP1+EP12)≤31.5; the effective focal length f3 of the third lens, the spacing distance EP23 between the second spacer element and the third spacer element, and the center thickness CT3 of the third lens on the optical axis satisfy the following: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0006] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consisting of seven lenses, and the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the optical axis from the object side to the image side; the spacer element group comprises at least a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens; the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy the following: 33.27≤f5 / (CT5+CP5)≤255.07; the curvature radius R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy the following: 0.9≤R11 / (D5m-d5m)≤3.43.

[0007] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consisting of seven lenses, and the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the optical axis from the object side to the image side; the spacer element group comprises at least a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, the spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76; the curvature radius R8 of the image side surface of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 4.66≤R8*N4 / d4s≤9.89.

[0008] Furthermore, the first lens has positive optical power, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element, the effective focal length f1 of the first lens, and the center thickness CT1 of the first lens on the optical axis satisfy: 5.19≤f1 / (EP01+CT1)≤11.76.

[0009] Furthermore, the object side surface of the first lens is a convex surface, and the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D1s of the object side surface of the first spacer element satisfy: 1.19≤D1s / (R1*N1)≤2.02.

[0010] Further, a center thickness CT1 of the first lens on the optical axis and a spacing distance EP12 between the first spacing element and the second spacing element satisfy: 1.05≤CT1 / EP12≤1.64.

[0011] Further, the air interval T23 between the second lens and the third lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the spacing distance EP23 between the second spacing element and the third spacing element satisfy: 0.88≤(T34+T23) / EP23≤1.48.

[0012] Furthermore, the image side surface of the first lens is concave, the object side surface of the second lens is convex, and the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.35≤(R2+R3) / d1s≤3.04.

[0013] Furthermore, the object side surface of the third lens is a convex surface, and a curvature radius R5 of the object side surface of the third lens and an inner diameter d2m of the image side surface of the second spacing element satisfy: 8.7≤R5 / d2m≤37.33.

[0014] Further, the image side surface of the third lens is a concave surface, and a curvature radius R6 of the image side surface of the third lens and an outer diameter D3s of the object side surface of the third spacer element satisfy: 1.02≤R6 / D3s≤1.93.

[0015] Furthermore, the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, and the spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76.

[0016] Furthermore, the image side surface of the fourth lens is a concave surface, the spacer element group also includes a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: 1.67≤R8 / D4m≤3.83.

[0017] Furthermore, the spacer element group also includes a fourth spacer element and a fifth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens. The spacing distance EP45 between the fourth spacer element and the fifth spacer element, the center thickness CT5 of the fifth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.58≤(CT5+T56) / EP45≤4.34.

[0018] Further, the fifth lens has positive optical power, the spacer element group also includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, and the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy: 33.27≤f5 / (CT5+CP5)≤255.07.

[0019] Furthermore, the object side surface of the sixth lens is a convex surface, the spacer element group also includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the curvature radius R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 0.9≤R11 / (D5m-d5m)≤3.43.

[0020] Further, the sixth lens has positive optical power, and the spacer element group also includes a fifth spacer element and a sixth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and contacts the image side portion of the sixth lens. The effective focal length f6 of the sixth lens and the spacing distance EP56 between the fifth spacer element and the sixth spacer element satisfy: 8.85≤f6 / EP56≤21.88.

[0021] Further, the seventh lens has negative optical power, the spacer element group also includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and contacts with the image side portion of the sixth lens, and the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: -12.64≤f7 / (CP6+T67)≤-4.56.

[0022] Furthermore, the object side surface of the seventh lens is a convex surface, the spacer element group also includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and is in contact with the image side surface portion of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens, the inner diameter d6m of the image side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element satisfy: 0.97≤R13 / (D6m-d6m)≤1.82.

[0023] Furthermore, the optical lens satisfies at least one of the following: the image side surface of the second lens is concave; the object side surface of the fourth lens is convex, the image side surface of the sixth lens is concave; and the image side surface of the seventh lens is concave.

[0024] According to the technical solution of the present invention, the optical lens comprises a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consists of seven lenses, and the lens group comprises a first lens, a second lens with positive focal length, a third lens with negative focal length, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along the optical axis; the spacer element group comprises at least a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens Partial contact, the third spacing element is located between the third lens and the fourth lens and partially contacts with the image side surface of the third lens; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacing element, and the spacing distance EP12 between the first spacing element and the second spacing element satisfy: 19.39≤f2 / (CP1+EP12)≤31.5; the effective focal length f3 of the third lens, the spacing distance EP23 between the second spacing element and the third spacing element, and the center thickness CT3 of the third lens on the optical axis satisfy: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0025] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element satisfy the following conditions: 19.39≤f2 / (CP1+EP12)≤31.5. While ensuring the light convergence ability of the lens close to the object side so that the light can be smoothly incident on the rear optical system, the bearing force of the first spacer element on the first spacer element and the second spacer element and the edge structure strength of the second lens are ensured, thereby improving the assembly stability of the optical lens at the first lens and the second lens. Since the effective focal length of the second lens is larger than the distance from the object side of the first spacer element to the object side of the second spacer element, the second lens has poor convergence ability for edge light, resulting in part of the edge light emitted through the second lens being emitted to the optical structure area of ​​the third lens, forming stray light and affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f3 / (EP23+CT3) within a reasonable range to adjust the deflection angle of the light when it passes through the third lens, intercept the invalid light path of the light reflected on the third lens and the optical element located on the object side of the third lens, reduce stray light, improve imaging quality, and help improve optical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 A dimensioning diagram of an optical lens of an optional embodiment of the present invention is shown;

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

[0029] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 1-2 of the present invention is shown;

[0030] Figures 4 to 6 The axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of the first embodiment of the present invention are respectively shown;

[0031] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 2-1 of the present invention is shown;

[0032] Figure 8 A schematic structural diagram of an optical lens according to Embodiment 2-2 of the present invention is shown;

[0033] Figures 9 to 11The axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of the second embodiment of the present invention are respectively shown;

[0034] Fig.12 A schematic structural diagram of an optical lens according to Embodiment 3-1 of the present invention is shown;

[0035] Fig.13 A schematic structural diagram of an optical lens according to Embodiment 3-2 of the present invention is shown;

[0036] Figures 14 to 16 The axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of the third embodiment of the present invention are respectively shown;

[0037] Fig.17 A schematic structural diagram of an optical lens according to Embodiment 4-1 of the present invention is shown;

[0038] Fig.18 A schematic structural diagram of an optical lens according to Embodiment 4-2 of the present invention is shown;

[0039] Figures 19 to 21 The axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of the fourth embodiment of the present invention are respectively shown;

[0040] Fig. 22 A stray light spot diagram of an optical lens of an optional embodiment of the present invention is shown;

[0041] Fig.23 A stray light path diagram of an optical lens in an example is shown;

[0042] Fig.24 Shows Fig.23 The stray light spot diagram of the optical lens;

[0043] Fig.25 shows a stray light path diagram of an optical lens in another example;

[0044] Fig.26 Shows Fig.25 The stray light spot diagram of the optical lens.

[0045] The above drawings include the following reference numerals:

[0046] P0, lens barrel; E1, first lens; P1, first spacing element; E2, second lens; P2, second spacing element; E3, third lens P3, third spacing element; E4, fourth lens; P4, fourth spacing element; E5, fifth lens; P5, fifth spacing element; E6, sixth lens; P6, sixth spacing element; E7, seventh lens; S1, object side surface of the first lens; S2, image side surface of the first lens; S3, object side surface of the second lens; S4, image side surface of the second lens; S5, object side surface of the third lens; S6, image side surface of the third lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0052] 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.

[0053] In order to solve the problem in the prior art that stray light is easily generated when improving the stability of the front-end lens assembly, the present invention provides an optical lens.

[0054] like Figures 1 to 21 As shown, the optical lens comprises a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consists of seven lenses, and the lens group comprises a first lens, a second lens with positive focal power, a third lens with negative focal power, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along the optical axis direction; the spacer element group comprises at least a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and contacts with the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and contacts with the image side surface of the second lens , the third spacing element is located between the third lens and the fourth lens and contacts the image side portion of the third lens; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacing element, and the spacing distance EP12 between the first spacing element and the second spacing element satisfy: 19.39≤f2 / (CP1+EP12)≤31.5; the effective focal length f3 of the third lens, the spacing distance EP23 between the second spacing element and the third spacing element, and the center thickness CT3 of the third lens on the optical axis satisfy: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0055] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element satisfy the following conditions: 19.39≤f2 / (CP1+EP12)≤31.5. While ensuring the light convergence ability of the lens close to the object side so that the light can be smoothly incident on the rear optical system, the bearing force of the first spacer element on the first spacer element and the second spacer element and the edge structure strength of the second lens are ensured, thereby improving the assembly stability of the optical lens at the first lens and the second lens. Since the effective focal length of the second lens is larger than the distance from the object side of the first spacer element to the object side of the second spacer element, the second lens has poor convergence ability for edge light, resulting in part of the edge light emitted through the second lens being emitted to the optical structure area of ​​the third lens, forming stray light and affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f3 / (EP23+CT3) within a reasonable range to adjust the deflection angle of the light when it passes through the third lens, intercept the invalid light path of the light reflected on the third lens and the optical element located on the object side of the third lens, reduce stray light, improve imaging quality, and help improve optical performance.

[0056] In addition, the light first passes through the convergence of the second lens, which is conducive to the edge light entering the third lens. Under the diffusion effect of the third lens, it is conducive to improving the matching degree between the edge field of view CRA of the optical lens and the chip CRA, reducing the risk of color cast. The second lens and the third lens have opposite optical focal lengths, so that the negative lens and the positive lens can correct the chromatic aberration mutually, improving the image quality. At the same time, limiting f2 / (CP1+EP12) and f3 / (EP23+CT3) within a reasonable range can simultaneously ensure the structural strength of the second lens and the third lens, further improving the stability of the front end assembly of the optical lens. At the same time, the mutual constraints between the sizes of the second lens, the third lens, the first spacing element, the second spacing element and the third spacing element are conducive to eliminating defocus, chromatic aberration and distortion, while further reducing the reflected stray light in the lens and the feather stray light generated by the inner diameter surface of the first spacing element, improving the image quality.

[0057] In addition, refer to Table 1 and Figure 22 to Figure 26 As shown, Fig. 22 The spot diagram of the optical lens when f2 / (CP1+EP12)=28.92 and f3 / (EP23+CT3)=-15.61 is shown. Fig.23 The diagram shows a partial optical path diagram of the optical lens when f2 / (CP1+EP12)=28.92 and f3 / (EP23+CT3)=-25. Fig.24 Shows Fig.23 The stray light spot diagram of the optical lens. Fig.25It shows a partial optical path schematic diagram of the optical lens when f2 / (CP1+EP12)=28.92 and f3 / (EP23+CT3)=-9. Fig.26 Shows Fig.25 The stray light spot diagram of the optical lens.

[0058] Depend on Figure 22 to Figure 26 As shown, when the optical lens meets f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-15.61, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical lens meets f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-25, the stray light energy is strong, the stray light has a greater impact on the image quality, and the performance is poor. When the optical lens meets f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-9, the stray light energy is strong, the stray light has a greater impact on the image quality, and the performance is poor. It can be seen that when f3 / (EP23+CT3) is in the range of -23.63 to -11.26, the optical lens has a better stray light improvement effect. Therefore, the present application intercepts the invalid light path of the light reflected on the third lens and the optical element located on the object side of the third lens by constraining -23.63≤f3 / (EP23+CT3)≤-11.26, thereby reducing stray light and improving imaging quality.

[0059]

[0060] Table 1

[0061] It should be noted that the present application limits f3 / (EP23+CT3) within a reasonable range, and the relationship between the second spacing element, the third spacing element and the third lens is to improve the stray light generated at the third lens to solve the stray light problem caused by f2 / (CP1+EP12) in the range of 19.39 to 31.5. When f3 / (EP23+CT3) meets the above range, the purpose of improving stray light can be achieved, and it does not depend on the focal length of the lens and the surface shape of the lens. The focal length and surface shape of the lens are further optimization of the optical lens on this basis. The other lenses except the second lens and the third lens can be positive or negative according to the actual design requirements of the optical system, and the surface shape of each lens can also be convex or concave according to the design requirements of the optical system. The optical system meets: 19.39≤f2 / (CP1+EP12)≤31.5; -23.63≤f3 / (EP23+CT3)≤-11.26, and the optical lens can reduce the influence of stray light while improving the assembly stability.

[0062] For example, in some optional embodiments, the first lens has positive focal power. By constraining the first lens to have positive focal power, it is beneficial for large-angle light to converge into the optical lens, which is beneficial to improve the luminous flux. For another example, in some optional embodiments, the fifth lens has positive focal power. By constraining the fifth lens to have positive focal power, it is beneficial for light to converge when passing through the fifth lens, so as to adapt to the chip at the imaging surface. For another example, in some optional embodiments, the sixth lens has positive focal power. By constraining the sixth lens to have positive focal power, it is beneficial for light to converge when passing through the sixth lens, so as to adapt to the chip at the imaging surface. For another example, in some optional embodiments, the seventh lens has negative focal power. By constraining the seventh lens to have negative focal power, it is beneficial for light to diverge appropriately when passing through the seventh lens, while balancing the aberration caused by the positive lens in front, thereby improving the imaging quality. For another example, in some optional embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the object side surface of the third lens is convex, and the image side surface of the third lens is concave; the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave; the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave; the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. By reasonably constraining the surface shape of each lens, it is beneficial to reasonably constrain the trend of light, ensure a smooth transition of light, and help correct aberrations. The optical lens can be simulated by software and / or tools such as ZEMAX and CODEV. Preferably, the optical lens can be simulated by CODEV. In the process of simulation using software and / or tools such as the above, the surface shape of each lens can be simulated and appropriately adjusted according to the surface shape of the software and / or tools used.

[0063] In some optional embodiments, the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element, the effective focal length f1 of the first lens, and the center thickness CT1 of the first lens on the optical axis satisfy the following conditions: 5.19≤f1 / (EP01+CT1)≤11.76. By constraining f1 / (EP01+CT1) within a reasonable range, the degree of light deflection in the first lens can be constrained, which helps to ensure that the edge thickness and center thickness of the first lens are within a reasonable range while ensuring the structural strength of the front end of the lens barrel. By constraining the effective focal length of the first lens, the center thickness of the first lens on the optical axis, and the distance between the object side end face of the lens barrel and the object side face of the first spacing element, the difficulty of molding the first lens can be ensured, the risk of weld marks during molding of the first lens can be reduced, thereby reducing the risk of stray light caused by weld marks and improving the cleanliness of optical lens imaging.

[0064] In some optional embodiments, the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D1s of the object side surface of the first spacing element satisfy: 1.19≤D1s / (R1*N1)≤2.02. By constraining D1s / (R1*N1) within a reasonable range, the surface shape of the object side surface of the first lens can be constrained, the machinability of the first lens can be improved, the surface deviation, distortion and appearance problems caused by molding can be reduced, and the production yield of the first lens can be improved. At the same time, constraining the relationship between the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D1s of the object side surface of the first spacing element is conducive to controlling the deflection angle of the light when entering the object side surface of the first lens, so as to reduce the light deflected at the first spacing element and reduce the light deflected at a large angle. At the same time, the first spacing element can effectively block the stray light generated by the first lens, avoid the generation of stray light, and improve the imaging quality.

[0065] In some optional embodiments, the center thickness CT1 of the first lens on the optical axis and the spacing distance EP12 between the first spacing element and the second spacing element satisfy: 1.05≤CT1 / EP12≤1.64. Constraining CT1 / EP12 within a reasonable range can effectively control the center thickness of the first lens and the edge thickness of the second lens, which is beneficial to improving the processability of the first lens and the second lens, avoiding the generation of weld marks, thereby reducing the risk of stray light caused by weld marks and improving the cleanliness of optical lens imaging. In addition, constraining the spacing distance between the first spacing element and the second spacing element is beneficial to improving the stability of the second lens supporting the first spacing element and the second spacing element, and is also beneficial to improving assembly stability.

[0066] In some optional embodiments, the air interval T23 between the second lens and the third lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the spacing distance EP23 between the second spacing element and the third spacing element satisfy: 0.88≤(T34+T23) / EP23≤1.48. By constraining (T34+T23) / EP23 within a reasonable range, it is beneficial to control the air interval between the second lens to the fourth lens within a reasonable range, to improve the stability of the air interval between two adjacent lenses from the second lens to the fourth lens, to reduce the sensitivity of the optical lens caused by the change of the air interval, and to ensure the spacing distance between the second spacing element and the third spacing element, so as to improve the edge structure strength of the third lens, to further improve the stability and consistency of the optical lens assembly, and to adjust the field curvature and improve the performance of the optical lens.

[0067] In some optional embodiments, the radius of curvature R2 of the image side surface of the first lens, the radius of curvature R3 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first spacer element satisfy the following relationship: 2.35≤(R2+R3) / d1s≤3.04. By constraining (R2+R3) / d1s within a reasonable range, it is helpful to control the degree of deflection of light when passing through the image side surface of the first lens and the object side surface of the second lens. At the same time, controlling the inner diameter of the object side surface of the first spacer element is helpful for the imaging light emitted by the first lens to pass smoothly through the first spacer element. At the same time, the first spacer element can also effectively block the stray light generated by the first lens and the second lens, avoid the generation of stray light, and improve the imaging quality. In addition, controlling the radius of curvature of the image side surface of the first lens and the radius of curvature of the object side surface of the second lens can also improve the machinability of the first lens and the second lens, reduce the surface deviation, distortion and appearance problems caused by molding, and help improve the production yield of the first lens and the second lens.

[0068] In some optional embodiments, the curvature radius R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacing element satisfy: 8.7≤R5 / d2m≤37.33. By constraining R5 / d2m within a reasonable range, the inner diameter of the image side surface of the second spacing element can block stray light from entering the third lens, and at the same time can control the degree of convergence of light on the object side surface of the third lens when the light enters the third lens, which is conducive to reducing the generation of stray light and improving the imaging quality. In addition, the processability of the third lens can be improved, the surface deviation, distortion and appearance problems caused by molding can be reduced, and the production yield of the third lens can be improved.

[0069] In some optional embodiments, the curvature radius R6 of the image side surface of the third lens and the outer diameter D3s of the object side surface of the third spacing element satisfy: 1.02≤R6 / D3s≤1.93. By constraining R6 / D3s within a reasonable range, the relevant diameter of the lens barrel at the object side surface of the third spacing element can be effectively controlled, which is conducive to taking into account the characteristics of miniaturization of the optical lens, while controlling the emission angle of light from the third lens, which is conducive to reducing the generation of stray light, and can also improve the processability of the third lens, reduce the surface deviation, distortion and appearance problems caused by molding, and improve the production yield of the third lens.

[0070] In some optional embodiments, the spacer element group further includes a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and is in contact with the image side portion of the fourth lens, and the spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76. By constraining |f4| / (EP34+T45) within a reasonable range, while ensuring the degree of light deflection by the fourth lens, it is beneficial to constrain the edge thickness of the fourth lens, thereby helping to reduce the processing angle of the curvature radius of the fourth lens, and facilitating the processing and molding of the fourth lens. At the same time, the edge structural strength of the fourth lens is guaranteed, the sensitivity of the optical lens to the air spacing is reduced, the stability of the optical performance is improved, and the interference between the fourth lens and the fifth lens caused by the manufacturing tolerance during the assembly process can be effectively avoided.

[0071] In some optional embodiments, the spacer element group further includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens and the outer diameter D4m of the image side surface of the fourth spacer element satisfy: 1.67≤R8 / D4m≤3.83. By constraining R8 / D4m within a reasonable range, the degree of deflection of the light when the light is emitted from the fourth lens is guaranteed, and at the same time, the fourth spacer element can absorb the stray light generated by the fourth lens, and reduce the generation of stray light while controlling the transmission path of the imaging light, thereby improving the imaging clarity. At the same time, the image side surface of the fourth lens has a divergent effect on the light, which is beneficial to improving the matching degree between the edge field of view CRA of the optical lens and the chip CRA, and reducing the risk of color cast. In addition, the inner diameter size of the lens barrel at the position of the fourth spacer element can also be controlled to ensure the outer diameter range of the lenses before and after the fourth spacer element, which is beneficial to the overall design of the optical lens.

[0072] In some optional embodiments, the spacer element group further includes a fourth spacer element and a fifth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, and the spacing distance EP45 between the fourth spacer element and the fifth spacer element, the center thickness CT5 of the fifth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.58≤(CT5+T56) / EP45≤4.34. By constraining (CT5+T56) / EP45 within a reasonable range, it is helpful to reduce the risk of weld marks during the molding of the fifth lens, thereby reducing the risk of stray light caused by weld marks, improving the cleanliness of the optical lens imaging, reducing the demolding force when the fifth lens is demolded after molding, reducing the surface deviation from the design curve caused by the mold release deformation of the fifth lens, and improving the MTF quality of the optical lens.

[0073] In some optional embodiments, the spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, and the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy: 33.27≤f5 / (CT5+CP5)≤255.07. By constraining f5 / (CT5+CP5) within a reasonable range, it is beneficial to ensure the degree of light deflection in the fifth lens while ensuring the structural strength of the fifth lens, and it can also ensure the bearing strength of the fifth spacer element on the fifth lens, reduce the risk of deformation of the fifth spacer element after assembly, and then ensure that the fifth spacer element will not be significantly deformed when the optical lens undergoes a high-temperature baking process, thereby improving the assembly stability. In addition, controlling the center thickness and effective focal length of the fifth lens can also effectively reduce the risk of weld marks on the fifth lens, avoid weld mark stray light, and improve imaging quality.

[0074] In some optional embodiments, the spacer element group further includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the radius of curvature R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 0.9≤R11 / (D5m-d5m)≤3.43. By constraining R11 / (D5m-d5m) within a reasonable range, the range of light intercepted by the fifth spacer element and the angle of light received by the object side surface of the sixth lens can be guaranteed, and the light interception efficiency of the fifth spacer element can be effectively improved while ensuring that the imaging light passes smoothly through the fifth spacer element into the sixth lens, and the bearing area of ​​the fifth spacer element can be guaranteed to be conducive to improving the assembly stability of the optical lens. In addition, by controlling the inner diameter and outer diameter of the image-side surface of the fifth spacer element, the baking deformation and assembly eccentricity of the fifth spacer element can be greatly reduced, and the leakage and stray light caused by the deformation and assembly eccentricity of the fifth spacer element can be reduced. At the same time, the smoothness and formability of the effective surface of the sixth lens can be improved, which is beneficial to improving the imaging quality.

[0075] In some optional embodiments, the spacer element group further includes a fifth spacer element and a sixth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and contacts the image side portion of the sixth lens, and the effective focal length f6 of the sixth lens and the spacing distance EP56 between the fifth spacer element and the sixth spacer element satisfy: 8.85≤f6 / EP56≤21.88. By constraining f6 / EP56 within a reasonable range, the dispersion phenomenon of the sixth lens can be reduced, the pixel of the optical lens can be improved, and the edge thickness and effective focal length of the sixth lens can also be constrained, which is conducive to balancing the rear focal length of the optical lens, ensuring that the light can reach a relatively stable imaging focal plane position after passing through the rear optical system, so that the imaging quality of the optical lens is stable during use.

[0076] In some optional embodiments, the spacer element group further includes a sixth spacer element, which is located between the sixth lens and the seventh lens and contacts the image side portion of the sixth lens, and the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: -12.64≤f7 / (CP6+T67)≤-4.56. By constraining f7 / (CP6+T67) within a reasonable range, the interval between the sixth lens and the seventh lens can be guaranteed, and the influence caused by the tolerance of the sixth lens and the seventh lens can be reduced. At the same time, the bearing stability of the sixth spacer element on the sixth lens and the seventh lens is guaranteed, and the sixth spacer element is guaranteed not to be significantly deformed after assembly and during baking. The structural stability of the sixth spacer element is guaranteed, which is conducive to ensuring its light blocking effect and reducing stray light. At the same time, controlling the diffusion degree of the seventh lens to the light is conducive to improving the matching degree between the CRA of the optical lens and the CRA of the chip, and ensuring the imaging quality.

[0077] In some optional embodiments, the spacer element group further includes a sixth spacer element, which is located between the sixth lens and the seventh lens and partially contacts the image side surface of the sixth lens. The curvature radius R13 of the object side surface of the seventh lens, the inner diameter d6m of the image side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element satisfy: 0.97≤R13 / (D6m-d6m)≤1.82. By constraining R13 / (D6m-d6m) within a reasonable range, the angle of the light entering the object side surface of the seventh lens can be ensured to ensure that the imaging light passes smoothly through the sixth spacer element and enters the seventh lens. At the same time, the sixth spacer element absorbs stray light to improve the imaging quality. It can also ensure the bearing width of the image side surface of the sixth spacer element, reduce the risk of deformation of the sixth spacer element during assembly and baking, improve assembly stability, and avoid stray light caused by deformation of the sixth spacer element. Controlling the curvature radius of the object side surface of the seventh lens can improve the machinability of the seventh lens, reduce the surface deviation, distortion and appearance problems caused by molding, and improve the production yield of the seventh lens.

[0078] In other optional embodiments, the optical lens includes a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group consists of seven lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along the optical axis; the spacer element group includes at least a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens; the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy: 33.27≤f5 / (CT5+CP5)≤255.07; the curvature radius R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 0.9≤R11 / (D5m-d5m)≤3.43.

[0079] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis and the maximum thickness CP5 of the fifth spacer element satisfy the following conditions: 33.27≤f5 / (CT5+CP5)≤255.07, it is beneficial to ensure the degree of deflection of light in the fifth lens while ensuring the structural strength of the fifth lens, and it can also ensure the bearing strength of the fifth spacer element on the fifth lens, reduce the risk of deformation of the fifth spacer element after assembly, and thus ensure that when the optical lens undergoes a high-temperature baking process, the fifth spacer element will not be significantly deformed, thereby improving the assembly stability. However, this is likely to cause non-imaging light to easily generate reflected stray light when entering the rear optical system, thereby affecting the imaging quality. Since the focal length of the fifth lens is relatively large, the degree of convergence of the light is relatively small, resulting in a larger dispersion range of the light, thereby causing the edge light emitted by the fifth lens to easily enter the optical structure area of ​​the sixth lens, and the light is reflected and refracted in the optical structure area of ​​the sixth lens to form stray light, thereby affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains R11 / (D5m-d5m) within a reasonable range, which can ensure the range of light intercepted by the fifth spacer element and the degree of light deflection of the object side of the sixth lens, and effectively improve the light interception efficiency of the fifth spacer element while ensuring that the imaging light passes smoothly through the fifth spacer element into the sixth lens. At the same time, it can also ensure that the supporting area of ​​the fifth spacer element is conducive to improving the assembly stability of the optical lens. In addition, by controlling the inner diameter and outer diameter of the image side of the fifth spacer element, the baking deformation and assembly eccentricity of the fifth spacer element can be greatly reduced, and the generation of light leakage and stray light caused by the deformation of the fifth spacer element and assembly eccentricity can be reduced. At the same time, the smoothness and formability of the effective surface of the sixth lens can be improved, which is conducive to improving the imaging quality. Controlling the center thickness and effective focal length of the fifth lens can also effectively reduce the risk of weld marks of the fifth lens, avoid weld mark stray light, and improve imaging quality.

[0080] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0081] In other optional embodiments, the optical lens includes a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group consists of seven lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along the optical axis; the spacer element group includes at least a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, the spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76; the curvature radius R8 of the image side surface of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: 4.66≤R8*N4 / d4s≤9.89.

[0082] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and when the spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 33.2≤|f4| / (EP34+T45)≤118.76, the degree of light deflection by the fourth lens can be guaranteed while the edge thickness of the fourth lens can be constrained to reduce the processing angle of the curvature radius of the fourth lens, which is beneficial to the processing and molding of the fourth lens, while ensuring the edge structural strength of the fourth lens, improving the assembly stability, reducing the sensitivity of the optical lens to the air spacing, and improving the stability of the optical performance. Since the focal length value of the fourth lens is large, the degree of light deflection is small, which leads to a small degree of deflection of the edge light, and it is easy to form large-angle light entering the optical structure area of ​​the rear optical system or the inner wall surface of the lens barrel to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains R8*N4 / d4s within a reasonable range, and at the same time constrains the curvature of the image side surface of the fourth lens and the inner diameter of the object side surface of the fourth spacing element, further controlling the deflection angle of the light emitted by the fourth lens, reducing the large-angle light deflected to the optical structure area of ​​the rear lens, and at the same time, the fourth spacing element can also block the deflected large-angle light, reducing the large-angle light entering the optical structure area of ​​the fifth lens, thereby reducing the generation of stray light, which is beneficial to improving the imaging quality.

[0083] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0084] In some optional embodiments, the above-mentioned multiple lenses may have at least one trimmed lens, the outer peripheral surface of the trimmed lens may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens is smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens.

[0085] In some optional embodiments, at least one trimming spacer element may be included in the plurality of spacer elements. The outer circumference of the trimming spacer element may have a trimming portion and a non-trimming portion, and the outer diameter of the trimming portion of the trimming spacer element is smaller than the outer diameter of the non-trimming portion of the trimming spacer element, and the outer diameter of the spacer element generally refers to the maximum outer diameter of the non-trimmed portion.

[0086] Optionally, the optical lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0087] It should be noted that each lens is composed of a central optical effective diameter area and an edge structure area, and the edge structure area is located on the outer peripheral side of the central optical effective diameter area and is arranged around the circumference of the central optical effective diameter area. The central optical effective diameter area is used for the passage of imaging light, while the edge structure area is not used for the passage of imaging light, and is used to abut against the lens barrel or adjacent lenses or adjacent spacing elements. The edge structure area is also called a non-effective diameter area.

[0088] The optical lens in the present application may use multiple lenses, such as the seven 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 adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0089] 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 seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0090] Figure 1 A schematic diagram of the dimensions of an optical lens of the present application is shown. Figure 1Parameters such as d1s, D1s, d2m, D3s, D4m, d5m, D5m, d6m, D6m, CP1, CP5, CP6, EP01, EP12, EP23, EP34, EP45, and EP56 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.

[0091] 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.

[0092] It should be noted that in the following embodiment 1, there are two examples, namely, embodiment 1-1 and embodiment 1-2; in embodiment 2, there are two examples, namely, embodiment 2-1 and embodiment 2-2; in embodiment 3, there are two examples, namely, embodiment 3-1 and embodiment 3-2; in embodiment 4, there are two examples, namely, embodiment 4-1 and embodiment 4-2. In the two examples of the same embodiment, the parameters such as the radius of curvature, center thickness, and spacing distance between lenses of the optical lens in the two examples are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the spacing elements such as the lens barrel, the first spacing element, the second spacing element, and the third spacing element, as well as the shapes of some lenses are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0093] It should be noted that any of the following embodiments 1 to 4 are applicable to all implementation methods of the present application.

[0094] Embodiment 1

[0095] like Figures 2 to 6 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 A schematic structural diagram of the optical lens of Example 1-2 is shown.

[0096] like Figure 2 and Figure 3 As shown, the optical lens includes a lens barrel P0, seven lenses and a plurality of spacing elements. The lens barrel P0 includes a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a sixth lens E6, a sixth spacing element P6 and a seventh lens, which are arranged in sequence from the object side to the image side.

[0097] like Figure 2As shown, it is the structural schematic diagram of the optical lens of embodiment 1-1. In this example, the object side surface S1 of the first lens abuts with the lens barrel part. The object side surface and the image side surface of the first spacer element P1 abut 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 element P2 abut 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 element P3 abut 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 element P4 abut with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively, the object side surface and the image side surface of the fifth spacer element P5 abut with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively, the object side surface and the image side surface of the sixth spacer element P6 abut with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens respectively, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0098] like Figure 3 FIG. 1 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 spacing element 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.

[0099] In summary, the structural parameters of the optical lens of Example 1 in Example 1-1 and Example 1-2 are shown in Table 11.

[0100] In Embodiment 1, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave.

[0101] Table 2 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 millimeters.

[0102]

[0103]

[0104] Table 2

[0105] In Embodiment 1, the object-side surface and the image-side surface of the first lens E1 to the seventh lens E7 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:

[0106]

[0107] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 1; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 3 shows 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 aspheric surface S1-S14 in Example 1.

[0108]

[0109]

[0110] Table 3

[0111] Figure 4 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 optical lens. Figure 5 The astigmatism curve of the optical lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6 The distortion curve of the optical lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0112] according to Figures 4 to 6 It can be seen that the optical lens provided in the first embodiment can achieve good imaging quality.

[0113] Embodiment 2

[0114] like Figures 7 to 11 As shown, the optical lens of the second embodiment is described. Figure 7 The structure diagram of the optical lens of Example 2-1 is shown. Figure 8 A schematic structural diagram of the optical lens of Example 2-2 is shown.

[0115] like Figure 7 and Figure 8As shown, the optical lens includes a lens barrel P0, seven lenses and a plurality of spacing elements. The lens barrel P0 includes a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a sixth lens E6, a sixth spacing element P6 and a seventh lens, which are arranged in sequence from the object side to the image side.

[0116] like Figure 7 As shown, it is the structural schematic diagram of the optical lens of embodiment 2-1. In this example, the object side surface S1 of the first lens abuts with the lens barrel part. The object side surface and the image side surface of the first spacer element P1 abut 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 element P2 abut 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 element P3 abut 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 element P4 abut with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively, the object side surface and the image side surface of the fifth spacer element P5 abut with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively, the object side surface and the image side surface of the sixth spacer element P6 abut with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens respectively, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0117] like Figure 8 FIG. 2 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 spacing element 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.

[0118] In summary, the structural parameters of the optical lens of Example 2 in Example 2-1 and Example 2-2 are shown in Table 11.

[0119] In the second embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave.

[0120] Table 4 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 millimeters.

[0121]

[0122] Table 4

[0123] Table 5 below lists the high-order coefficients of the aspheric surfaces S1-S14 that can be used in the second embodiment. The surface type of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0124]

[0125]

[0126] Table 5

[0127] Fig. 9 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 optical lens. Fig.10 The astigmatism curve of the optical lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.11 The distortion curve of the optical lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0128] according to Figures 9 to 11 It can be seen that the optical lens provided in the second embodiment can achieve good imaging quality.

[0129] Embodiment 3

[0130] like Figures 12 to 16 As shown, the optical lens of embodiment 3 is described. Fig.12 The structure diagram of the optical lens of Example 3-1 is shown. Fig.13 A schematic structural diagram of the optical lens of Example 3-2 is shown.

[0131] like Fig.12 and Fig.13 As shown, the optical lens includes a lens barrel P0, seven lenses and a plurality of spacing elements. The lens barrel P0 includes a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a sixth lens E6, a sixth spacing element P6 and a seventh lens, which are arranged in sequence from the object side to the image side.

[0132] like Fig.12 As shown, it is the structural schematic diagram of the optical lens of embodiment 3-1. In this example, the object side surface S1 of the first lens abuts with the lens barrel part. The object side surface and the image side surface of the first spacer element P1 abut 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 element P2 abut 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 element P3 abut 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 element P4 abut with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively, the object side surface and the image side surface of the fifth spacer element P5 abut with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively, the object side surface and the image side surface of the sixth spacer element P6 abut with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens respectively, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0133] like Fig.13 FIG. 3 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 spacing element 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.

[0134] In summary, the structural parameters of the optical lens of Example 3 in Example 3-1 and Example 3-2 are shown in Table 11.

[0135] In the third embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave.

[0136] Table 6 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]

[0138] Table 6

[0139] Table 7 below lists the high-order coefficients of the aspheric surfaces S1-S14 that can be used in the third embodiment. The surface type of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0140] Face number A4 A6 A8 A10 A12 A14 A16 S1 -7.4220E-03 -1.7936E-03 -1.0647E-03 -4.7391E-04 -1.6837E-04 -6.1597E-05 -1.9114E-05 S2 -6.7272E-02 -3.5397E-03 -7.6630E-04 -2.2670E-04 -5.3126E-05 -1.3854E-05 -5.0406E-06 S3 -1.1069E-01 9.0025E-03 2.1046E-03 -2.7484E-04 -3.7925E-05 1.6481E-05 -1.3099E-05 S4 -5.8593E-02 1.6716E-02 2.9987E-04 -7.3912E-04 -1.8976E-04 -1.4495E-04 -9.5076E-05 S5 -1.0909E-02 -1.6785E-03 -2.2598E-03 -4.0090E-04 -2.8971E-04 -1.8579E-04 -1.1063E-04 S6 2.0224E-02 -5.8500E-03 7.2032E-04 1.3554E-04 -4.0886E-04 -1.4069E-04 6.3559E-07 S7 -2.8279E-01 -1.6980E-02 -4.6746E-04 -6.4671E-04 -1.9329E-03 -1.7006E-03 -1.1359E-03 S8 -3.4785E-01 1.6565E-02 6.5356E-03 6.6625E-05 -2.3898E-03 -1.0679E-03 -2.5845E-04 S9 -1.0096E-01 8.1166E-02 -2.2269E-02 -1.6211E-03 -6.2805E-04 -9.2161E-05 -7.4936E-04 S10 -5.0185E-01 1.7877E-01 -2.3366E-02 -9.9335E-03 -1.4158E-03 3.3825E-05 -5.3864E-04 S11 -1.4206E+00 1.2775E-02 6.2565E-02 -1.0733E-02 -5.0424E-03 -7.6931E-05 1.0901E-03 S12 -4.4882E-01 -2.2501E-02 1.0958E-01 -5.9051E-02 1.9419E-03 7.0265E-03 -5.8597E-04 S13 -3.0898E+00 9.9958E-01 -3.7207E-01 9.8862E-02 -1.6221E-02 7.0391E-03 -5.7008E-03 S14 -6.6303E+00 1.2914E+00 -5.2191E-01 1.4720E-01 -7.5954E-02 1.8284E-02 -1.7842E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -9.7446E-06 -1.1367E-06 2.6639E-07 -7.7096E-07 1.7422E-07 -1.3922E-07 1.3826E-07 S2 -3.5618E-06 -1.4659E-06 -6.3667E-07 1.8411E-07 -3.2155E-07 6.9392E-10 9.8222E-08 S3 -7.4179E-06 5.4497E-07 2.2791E-06 -6.3815E-07 -7.4086E-07 1.2199E-07 7.4134E-07 S4 -3.5785E-05 -3.7670E-06 2.5745E-06 1.2069E-06 1.3099E-06 1.2014E-06 1.3695E-06 S5 -3.0603E-05 -1.0593E-05 3.0838E-06 -3.3966E-06 1.7255E-07 -1.3942E-06 1.7126E-06 S6 4.6882E-05 3.4451E-05 1.4349E-05 -1.1015E-07 -3.4364E-08 1.1172E-06 -4.8219E-07 S7 -6.7484E-04 -3.6168E-04 -2.0936E-04 -1.1674E-04 -5.5732E-05 -2.5551E-05 -7.6744E-06 S8 6.3074E-05 1.4825E-04 6.9226E-05 4.0074E-05 2.0475E-05 6.4154E-06 2.2720E-06 S9 -3.0278E-05 1.9415E-05 -6.6536E-05 -4.9666E-06 1.2754E-05 -1.5054E-05 5.1937E-06 S10 -6.1621E-04 1.3493E-04 2.0113E-05 3.7814E-06 -3.4356E-05 3.4241E-05 -6.5644E-06 S11 -3.7400E-04 1.5789E-04 -4.7512E-05 8.6082E-05 -4.9846E-05 9.2755E-06 -3.5952E-07 S12 -1.3492E-03 -9.5679E-05 2.4807E-04 1.8429E-04 -1.1195E-04 2.4662E-06 3.7699E-06 S13 1.2893E-03 7.4032E-04 -6.0598E-04 1.9512E-04 -3.4316E-05 3.2495E-06 -1.3033E-07 S14 5.2474E-03 -5.1779E-03 -3.3945E-04 -1.1749E-03 -1.9563E-04 -4.1001E-04 0.0000E+00

[0141] Table 7

[0142] Fig.14 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 rays of different wavelengths after passing through the optical lens. Fig.15 The astigmatism curve of the optical lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The distortion curve of the optical lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0143] according to Figures 14 to 16 It can be seen that the optical lens provided in the third embodiment can achieve good imaging quality.

[0144] Embodiment 4

[0145] like Figures 17 to 21 As shown, the optical lens of embodiment 4 is described. Fig.17 FIG4 is a schematic diagram showing the structure of the optical lens of Example 4-1. Fig.18 A schematic structural diagram of the optical lens of Example 4-2 is shown.

[0146] like Fig.17 and Fig.18 As shown, the optical lens includes a lens barrel P0, seven lenses and a plurality of spacing elements. The lens barrel P0 includes a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a sixth lens E6, a sixth spacing element P6 and a seventh lens, which are arranged in sequence from the object side to the image side.

[0147] like Fig.17 As shown, it is the structural schematic diagram of the optical lens of embodiment 4-1. In this example, the object side surface S1 of the first lens abuts with the lens barrel part. The object side surface and the image side surface of the first spacer element P1 abut 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 element P2 abut 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 element P3 abut 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 element P4 abut with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively, the object side surface and the image side surface of the fifth spacer element P5 abut with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively, the object side surface and the image side surface of the sixth spacer element P6 abut with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens respectively, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0148] like Fig.18 , which is a schematic diagram of the structure of the optical lens of Example 4-2. In this example, the supporting and abutting manner of each spacing element is the same as that of Example 4-1, and the relevant description in Example 4-1 may be referred to, and will not be repeated here.

[0149] In summary, the structural parameters of the optical lens of Example 4 in Example 4-1 and Example 4-2 are shown in Table 11.

[0150] In Embodiment 4, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens E4 has negative focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is convex. The sixth lens E6 has positive focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave.

[0151] Table 8 shows the basic structural parameters of the optical lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0152]

[0153]

[0154] Table 8

[0155] Table 9 below lists the high-order coefficients of the aspheric surfaces S1-S14 that can be used in the fourth embodiment. The surface type of each aspheric surface can be defined by the formula (1) given in the first embodiment above.

[0156] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.9100E-02 -8.6584E-03 -1.4444E-03 8.2253E-05 1.4201E-04 4.3102E-05 -7.9885E-06 S2 -1.2318E-01 9.9006E-03 6.1672E-03 1.2896E-03 6.2245E-04 3.1974E-04 1.1880E-04 S3 -1.1493E-01 1.5732E-02 4.6793E-03 1.6788E-04 5.3586E-04 3.4895E-04 1.1247E-04 S4 -6.5701E-02 -3.8744E-04 -2.1424E-03 9.3760E-05 2.8636E-04 3.2416E-05 -1.2712E-05 S5 4.2291E-03 5.5255E-03 5.9514E-04 1.2466E-03 2.9975E-04 1.7590E-04 1.6779E-04 S6 4.6267E-02 8.5221E-03 2.0217E-03 7.0269E-04 -4.5700E-06 -3.9094E-05 -5.6570E-06 S7 -1.9378E-01 -1.0483E-02 5.9704E-05 9.3276E-04 -9.6837E-06 -1.8098E-04 -2.5573E-04 S8 -2.5101E-01 8.3922E-03 3.0022E-03 2.7315E-03 4.2947E-04 -3.4831E-05 -2.1293E-04 S9 -1.8494E-01 7.6433E-02 -3.5078E-02 -1.4172E-03 9.7484E-04 -4.5212E-04 -7.5732E-04 S10 -4.4519E-01 2.0777E-01 -7.7256E-02 -1.4207E-02 8.6390E-03 1.3359E-03 -3.4219E-03 S11 -2.2969E+00 1.8572E-01 7.5006E-02 -4.7976E-02 -3.7686E-03 2.4777E-03 2.3828E-04 S12 -7.0781E-01 5.4957E-02 9.8220E-02 -5.5145E-02 2.7240E-02 -2.0406E-03 -8.3989E-03 S13 -4.6814E+00 1.7290E+00 -7.3272E-01 2.7189E-01 -6.6916E-02 -1.4749E-03 4.5713E-03 S14 -8.4853E+00 1.9464E+00 -6.2804E-01 2.5669E-01 -1.1434E-01 4.2171E-02 -2.3094E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.3980E-05 -9.4745E-06 -3.1517E-06 -1.4694E-06 2.6834E-08 0.0000E+00 0.0000E+00 S2 4.6306E-05 2.7793E-05 1.4053E-05 5.8980E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.6373E-05 2.4066E-05 8.0427E-06 1.9379E-06 0.0000E+00 0.0000E+00 0.0000E+00 S4 2.3789E-06 -3.5906E-06 -5.0371E-06 -1.9762E-06 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.3948E-04 7.9741E-05 4.5868E-05 2.2279E-05 1.0230E-05 0.0000E+00 0.0000E+00 S6 -2.9351E-06 4.1562E-06 -4.5279E-08 2.0822E-06 8.8418E-07 2.2133E-06 2.6218E-07 S7 -1.3068E-04 -9.8866E-05 -4.3694E-05 -3.3759E-05 -9.4791E-06 -8.6115E-06 -5.2434E-08 S8 -6.5027E-05 -2.9991E-05 -6.5465E-06 -2.9308E-06 6.1608E-06 1.8373E-06 -2.0703E-08 S9 5.3049E-06 -1.3733E-04 -4.8473E-05 2.0196E-05 -9.3458E-06 -2.4980E-05 6.4016E-06 S10 -4.0699E-04 6.6642E-04 -2.2345E-05 -1.9409E-04 0.0000E+00 0.0000E+00 0.0000E+00 S11 -3.8323E-04 -1.0842E-03 -9.1677E-04 -9.2866E-05 2.7721E-05 0.0000E+00 0.0000E+00 S12 1.2690E-03 9.8396E-04 -1.1466E-03 -1.2824E-03 -4.2639E-04 0.0000E+00 0.0000E+00 S13 5.4749E-03 -6.8125E-03 2.4557E-03 5.3568E-04 -9.8475E-04 4.5998E-04 -9.4050E-05 S14 1.3949E-02 -7.3084E-03 2.9864E-03 -7.2208E-04 4.8068E-04 -2.6079E-04 0.0000E+00

[0157] Table 9

[0158] Fig.19 The axial chromatic aberration curve of the optical lens of Example 4 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the optical lens. Fig. 20 The astigmatism curve of the optical lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.21 The distortion curve of the optical lens of the fourth embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles.

[0159] according to Figures 19 to 21 It can be seen that the optical lens provided in the fourth embodiment can achieve good imaging quality.

[0160] In summary, the optical lenses of Embodiments 1 to 4 respectively satisfy the relationship shown in Table 10.

[0161] Conditional / Example 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 f1 / (EP01+CT1) 11.76 11.13 5.21 5.71 5.45 5.19 6.95 6.64 D1s / (R1*N1) 1.43 1.19 1.53 1.32 1.46 1.20 2.02 1.34 f2 / (CP1+EP12) 19.39 20.41 25.99 24.88 31.50 28.92 30.22 26.76 CT1 / EP12 1.05 1.10 1.61 1.55 1.56 1.43 1.64 1.43 (T34+T23) / EP23 0.93 0.93 0.88 0.90 1.38 1.48 1.16 1.40 f3 / (EP23+CT3) -11.26 -11.29 -12.66 -12.81 -14.96 -15.61 -21.01 -23.63 |f4| / (EP34+T45) 61.36 56.41 118.76 109.61 87.17 78.20 38.93 33.20 f5 / (CT5+CP5) 244.77 255.07 100.54 97.01 44.17 44.93 33.27 34.26 f6 / EP56 17.05 15.82 19.35 21.88 8.85 9.11 20.75 18.93 (CT5+T56) / EP45 1.58 1.65 2.32 2.72 4.34 3.63 2.61 2.95 f7 / (CP6+T67) -5.26 -5.45 -8.49 -8.50 -12.64 -12.61 -4.65 -4.56 (R2+R3) / d1s 2.72 2.73 2.35 2.47 3.04 2.95 2.96 2.89 R5 / d2m 12.09 11.66 32.21 32.95 37.33 36.71 8.96 8.70 R6 / D3s 1.21 1.54 1.57 1.52 1.48 1.93 1.02 1.64 R8 / D4m 1.82 1.77 2.20 1.99 3.76 3.83 1.67 1.74 R11 / (D5m-d5m) 1.99 2.03 1.26 1.45 0.90 1.09 3.43 3.32 R13 / (D6m-d6m) 1.65 1.47 1.57 1.82 0.97 1.05 1.48 1.53 R8*N4 / d4s 4.66 6.80 6.63 9.89 9.68 6.01 5.79 4.66

[0162] Table 10

[0163] Table 11 shows some parameters of the optical lenses of Examples 1 to 4 (unit: mm).

[0164]

[0165]

[0166] Table 11

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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: The invention comprises a lens barrel and a lens group and a spacer element group arranged in the lens barrel, The lens group is composed of seven lenses, and the lens group includes, from the object side to the image side along the optical axis, a first lens, a second lens with positive optical power, a third lens with negative optical power, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence; The spacer element group includes at least a first spacer element, a second spacer element, and a third spacer element, the first spacer element is located between the first lens and the second lens and contacts the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side surface of the second lens, and the third spacer element is located between the third lens and the fourth lens and contacts the image side surface of the third lens; The effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacing element, and the spacing distance EP12 between the first spacing element and the second spacing element satisfy the following: 19.39≤f2 / (CP1+EP12)≤31.5; The effective focal length f3 of the third lens, the spacing distance EP23 between the second spacing element and the third spacing element, and the center thickness CT3 of the third lens on the optical axis satisfy: -23.63≤f3 / (EP23+CT3)≤-11.

26.

2. The optical lens according to claim 1, characterized in that: The first lens has positive focal power, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacer element, the effective focal length f1 of the first lens, and the center thickness CT1 of the first lens on the optical axis satisfy the following: 5.19≤f1 / (EP01+CT1)≤11.

76.

3. The optical lens according to claim 1, characterized in that: The object side surface of the first lens is a convex surface, and the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, and the outer diameter D1s of the object side surface of the first spacer element satisfy: 1.19≤D1s / (R1*N1)≤2.

02.

4. The optical lens according to claim 1, characterized in that: A center thickness CT1 of the first lens on the optical axis and a spacing distance EP12 between the first spacing element and the second spacing element satisfy the following: 1.05≤CT1 / EP12≤1.

64.

5. The optical lens according to claim 1, characterized in that: The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, and the spacing distance EP23 between the second spacing element and the third spacing element satisfy the following: 0.88≤(T34+T23) / EP23≤1.

48.

6. The optical lens according to claim 1, characterized in that: The image side surface of the first lens is concave, the object side surface of the second lens is convex, and the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.35≤(R2+R3) / d1s≤3.

04.

7. The optical lens according to claim 1, characterized in that: The object side surface of the third lens is a convex surface, and the curvature radius R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacer element satisfy the following: 8.7≤R5 / d2m≤37.

33.

8. The optical lens according to claim 1, characterized in that: The image side surface of the third lens is a concave surface, and the curvature radius R6 of the image side surface of the third lens and the outer diameter D3s of the object side surface of the third spacer element satisfy the following: 1.02≤R6 / D3s≤1.

93.

9. The optical lens according to any one of claims 1 to 8, characterized in that: The spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The spacing distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.

76.

10. The optical lens according to any one of claims 1 to 8, characterized in that: The image side surface of the fourth lens is a concave surface, and the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens and the outer diameter D4m of the image side surface of the fourth spacer element satisfy the following: 1.67≤R8 / D4m≤3.

83.

11. The optical lens according to any one of claims 1 to 8, characterized in that: The spacer element group also includes a fourth spacer element and a fifth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens. The spacing distance EP45 between the fourth spacer element and the fifth spacer element, the center thickness CT5 of the fifth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 1.58≤(CT5+T56) / EP45≤4.

34.

12. The optical lens according to any one of claims 1 to 8, characterized in that: The fifth lens has positive optical power, and the spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens. The effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy the following: 33.27≤f5 / (CT5+CP5)≤255.

07.

13. The optical lens according to any one of claims 1 to 8, characterized in that: The object side surface of the sixth lens is a convex surface, and the spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens. The curvature radius R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy the following: 0.9≤R11 / (D5m-d5m)≤3.

43.

14. The optical lens according to any one of claims 1 to 8, characterized in that: The sixth lens has positive optical power, and the spacer element group further includes a fifth spacer element and a sixth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens. The sixth spacer element is located between the sixth lens and the seventh lens and contacts the image side portion of the sixth lens. The effective focal length f6 of the sixth lens and the spacing distance EP56 between the fifth spacer element and the sixth spacer element satisfy the following: 8.85≤f6 / EP56≤21.

88.

15. The optical lens according to any one of claims 1 to 8, characterized in that: The seventh lens has negative optical power, and the spacer element group also includes a sixth spacer element, which is located between the sixth lens and the seventh lens and contacts with the image side portion of the sixth lens. The effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy the following: -12.64≤f7 / (CP6+T67)≤-4.

56.

16. The optical lens according to any one of claims 1 to 8, characterized in that: The object side surface of the seventh lens is a convex surface, and the spacer element group also includes a sixth spacer element, which is located between the sixth lens and the seventh lens and partially contacts with the image side surface of the sixth lens, and the curvature radius R13 of the object side surface of the seventh lens, the inner diameter d6m of the image side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element satisfy the following: 0.97≤R13 / (D6m-d6m)≤1.

82.

17. The optical lens according to any one of claims 1 to 8, characterized in that: The optical lens meets at least one of the following requirements: The image side surface of the second lens is a concave surface; The object side surface of the fourth lens is a convex surface, The image side surface of the sixth lens is a concave surface; The image side surface of the seventh lens is a concave surface.

Images