Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, first to seventh lenses, a third spacing element and a fourth spacing element, wherein the first to seventh lenses, the third spacing element and the fourth spacing element are arranged in the lens barrel; the center thickness CT4 of the fourth lens on an optical axis, the air spacing T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacing element meet the following conditions: 1.07 < = (CP4 + CT4) / T34 < = 1.5; the combined focal length f45 of the fourth lens and the fifth lens and the spacing distance EP34 between the third spacing element and the fourth spacing element meet the condition that f45 / EP34 is larger than or equal to 18.82 and smaller than or equal to 24.58. According to the invention, the problem of stray light caused by the optical lens in the prior art in order to meet the assembly stability is solved.

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] With the development of electronic products, users have higher and higher requirements for the optical lenses installed in electronic products. In order to meet users' needs for shooting functions, optical lenses are gradually developing towards high pixels. Generally speaking, the more lenses an optical lens has, the higher its pixels are. However, the increase in optical elements inside the optical lens will also lead to problems such as poor assembly stability and more stray light. In particular, the lens group located in the middle area of ​​the optical lens not only plays a role in the transmission of light between the front optical system and the rear optical system, but also affects the bearing stability of the front optical system and the rear optical system. In some optical lenses, in order to improve the assembly stability of the lenses in the center area of ​​the optical lens, stray light will be generated, affecting the imaging quality.

[0003] That is to say, in the prior art, the optical lens has the problem of stray light caused by the need to meet the assembly stability. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical lens to solve the problem of stray light caused by the optical lens in the prior art in order to meet the assembly stability.

[0005] To achieve the above-mentioned object, according to one 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, the lens group comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly 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 center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy the following: 1.07≤(CP4+CT4) / T34≤1.5; the combined focal length f45 of the fourth lens and the fifth lens, and the interval distance EP34 between the third spacer element and the fourth spacer element satisfy the following: 18.82≤f45 / EP34≤24.58.

[0006] According to another 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 comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly comprises at least a fifth spacer element and a sixth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and is in contact with the image side surface of the fifth lens, and the sixth spacer element is located between the sixth lens and the image side surface of the fifth lens. The seventh lens is in contact with the image side portion of the sixth lens, the spacing distance EP56 between the fifth spacing element and the sixth spacing element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28; the inner diameter d0m of the image side end surface of the lens barrel, the refractive index N7 of the seventh lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy: -4.27≤d0m*N7 / R13≤-3.82.

[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, wherein the lens group is composed of seven lenses, the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly comprises at least a second spacer element and a third spacer element, the second spacer element is located between the second lens and the third lens and contacts the image side surface portion of the second lens, the third spacer element is located between the third lens and the fourth lens and contacts the image side surface portion of the third lens The fourth spacing element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the center thickness CT3 of the third lens on the optical axis, the air spacing T23 between the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacing element and the third spacing element satisfy: 2.18≤(EP23+CT3) / T23≤3.32; the inner diameter d3m of the image side surface of the third spacing element, the refractive index N4 of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 3.59≤R8*N4 / d3m≤5.46.

[0008] Further, the image side surface of the fourth lens is concave, and the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side of the fourth spacing element, and the inner diameter d4s of the object side of the fourth spacing element satisfy: 2.11≤R8 / (D4s-d4s)≤6.63.

[0009] Further, a curvature radius R5 of the object side surface of the third lens, a center thickness CT3 of the third lens on the optical axis, and a maximum thickness CP3 of the third spacer element satisfy: 2.1 mm≤|R5| / (CT3 / CP3)≤6.22 mm.

[0010] Furthermore, the image side surface of the third lens is convex, and the curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacing element, and the inner diameter d3s of the object side surface of the third spacing element satisfy: -13.29≤R6 / (D3s-d3s)≤-3.55.

[0011] Furthermore, the spacer element assembly also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens. The center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacer element and the third spacer element satisfy: 2.18≤(EP23+CT3) / T23≤3.32.

[0012] Further, the spacing distance EP34 between the third spacing element and the fourth spacing element, and the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: -3.1≤EP34 / SAG41≤-1.85.

[0013] Furthermore, the image side surface of the fifth lens is a convex surface, and the spacer element assembly 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, and an outer diameter D5s of the object side surface of the fifth spacer element and a curvature radius R10 of the image side surface of the fifth lens satisfy: -1.63≤R10 / D5s≤-1.33.

[0014] Furthermore, the object side surface of the seventh lens is a concave surface, and the inner diameter d0m of the image side end surface of the lens barrel, the refractive index N7 of the seventh lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy: -4.27≤d0m*N7 / R13≤-3.82.

[0015] Furthermore, the image side surface of the seventh lens is a concave surface, and the spacer element assembly also 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, and an outer diameter D6m of the image side surface of the sixth spacer element and a curvature radius R14 of the image side surface of the seventh lens satisfy: 3.78≤D6m / R14≤4.25.

[0016] Furthermore, the image side surface of the sixth lens is a convex surface, and the spacer element assembly also 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, and the inner diameter d6s of the object side surface of the sixth spacer element, the outer diameter D6s of the object side surface of the sixth spacer element, and the curvature radius R12 of the image side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.01.

[0017] Furthermore, the seventh lens has negative optical power, and the spacer element assembly also 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 maximum thickness CP6 of the sixth spacer element and the effective focal length f7 of the seventh lens satisfy: -8.9≤f7 / CP6≤-5.87.

[0018] Furthermore, the spacer element assembly 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 spacing distance EP56 between the fifth spacer element and the sixth spacer element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28.

[0019] Further, the optical lens satisfies at least one of the following: the first lens has positive focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the fourth lens has negative focal power, and the object side surface of the fourth lens is convex; the fifth lens has positive focal power, and the object side surface of the fifth lens is convex; the sixth lens has positive focal power, and the object side surface of the sixth lens is convex.

[0020] Furthermore, the optical lens satisfies at least one of the following: the second lens has negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; and the third lens has positive optical power.

[0021] 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, the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly 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 center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy the following conditions: 1.07≤(CP4+CT4) / T34≤1.5; the combined focal length f45 of the fourth lens and the fifth lens, and the interval distance EP34 between the third spacer element and the fourth spacer element satisfy the following conditions: 18.82≤f45 / EP34≤24.58.

[0022] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy the following conditions: 1.07≤(CP4+CT4) / T34≤1.5, it can be ensured that the interference between the fourth lens and the third lens is reduced when the fourth lens is assembled, which is beneficial to improving the stability of the fourth lens assembly. At the same time, the maximum thickness CP4 of the fourth spacer element and the center thickness CT4 of the fourth lens on the optical axis are constrained, which can ensure the structural strength of the fourth lens and the structural strength of the fourth spacer element, ensure the stability of the fourth lens structure and the stability of the fourth spacer element supporting the front and rear lenses, and further improve the stability of the optical lens assembly. However, this is likely to cause the thickness of the fourth spacer element to be thicker, and thus it is easy to form reflected stray light at the position of the fourth spacer element, and it may also cause the center thickness of the fourth lens to be larger, extending the optical path of the light in the fourth lens, thereby affecting the light emission angle, causing part of the light to be reflected to the structural area of ​​the fourth lens to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f45 / EP34 within a reasonable range to adjust the deflection angle of the light in the fourth lens and the fifth lens, while ensuring that the light converges to the sixth lens, reducing large-angle light, which is conducive to reducing the generation of stray light. At the same time, constraining the spacing distance EP34 between the third spacing element and the fourth spacing element can constrain the edge thickness range of the fourth lens, which is conducive to controlling the structural form of the fourth lens, reducing the generation of weld marks, and avoiding the risk of stray light at the weld marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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:

[0024] Figure 1 A dimensioning diagram of an optical lens of an optional embodiment of the present invention is shown;

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

[0026] Figure 3 A schematic structural diagram of an optical lens according to Embodiment 1-2 of the present invention is shown;

[0027] Figure 4 and Figure 5 The axial chromatic aberration and astigmatism curves of the optical lens of the first embodiment of the present invention are respectively shown;

[0028] Figure 6 A schematic structural diagram of an optical lens according to Embodiment 2-1 of the present invention is shown;

[0029] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 2-2 of the present invention is shown;

[0030] Figure 8 and Fig. 9 The axial chromatic aberration and astigmatism curves of the optical lens of the second embodiment of the present invention are respectively shown;

[0031] Fig.10 A schematic structural diagram of an optical lens according to Embodiment 3-1 of the present invention is shown;

[0032] Fig.11 A schematic structural diagram of an optical lens according to Embodiment 3-2 of the present invention is shown;

[0033] Fig.12 and Fig.13 The axial chromatic aberration and astigmatism curves of the optical lens of the third embodiment of the present invention are respectively shown;

[0034] Fig.14 A schematic structural diagram of an optical lens according to Embodiment 4-1 of the present invention is shown;

[0035] Fig.15 A schematic structural diagram of an optical lens according to Embodiment 4-2 of the present invention is shown;

[0036] Fig.16 and Fig.17 The axial chromatic aberration and astigmatism curves of the optical lens of the fourth embodiment of the present invention are respectively shown.

[0037] Fig.18 A stray light path diagram of an optical lens in an optional embodiment of the present invention is shown;

[0038] Fig.19 Shows Fig.18 The stray light spot diagram of the optical lens;

[0039] Fig. 20 A stray light path diagram of a lens in an example optical center is shown;

[0040] Fig.21 Shows Fig. 20 The stray light spot diagram of the optical lens;

[0041] Fig. 22 Another example of a stray light path diagram of an optical lens in light is shown;

[0042] Fig.23 Shows Fig. 22 The stray light spot diagram of the optical lens.

[0043] The above drawings include the following reference numerals:

[0044] 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;

[0045] E6, the sixth lens; P6, the sixth spacing element; E7, the seventh lens; S1, the object-side surface of the first lens; S2, the image-side surface of the first lens; S3, the object-side surface of the second lens; S4, the image-side surface of the second lens; S5, the object-side surface of the third lens; S6, the image-side surface of the third lens; S7, the object-side surface of the fourth lens; S8, the image-side surface of the fourth lens; S9, the object-side surface of the fifth lens; S10, the image-side surface of the fifth lens; S11, the object-side surface of the sixth lens; S12, the image-side surface of the sixth lens; S13, the object-side surface of the seventh lens; S14, the image-side surface of the seventh lens. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] In order to solve the problem of stray light caused by the optical lens in the prior art in order to meet the assembly stability, the present invention provides an optical lens.

[0053] like Figures 1 to 17As shown, 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 arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly 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, and 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 center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.07≤(CP4+CT4) / T34≤1.5; the combined focal length f45 of the fourth lens and the fifth lens, and the interval distance EP34 between the third spacer element and the fourth spacer element satisfy: 18.82≤f45 / EP34≤24.58.

[0054] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy the following conditions: 1.07≤(CP4+CT4) / T34≤1.5, it can be ensured that the interference between the fourth lens and the third lens is reduced when the fourth lens is assembled, which is beneficial to improving the stability of the fourth lens assembly. At the same time, the maximum thickness CP4 of the fourth spacer element and the center thickness CT4 of the fourth lens on the optical axis are constrained, which can ensure the structural strength of the fourth lens and the structural strength of the fourth spacer element, ensure the stability of the fourth lens structure and the stability of the fourth spacer element supporting the front and rear lenses, and further improve the stability of the optical lens assembly. However, this is likely to cause the thickness of the fourth spacer element to be thicker, and thus it is easy to form reflected stray light at the position of the fourth spacer element, and it may also cause the center thickness of the fourth lens to be larger, extending the optical path of the light in the fourth lens, thereby affecting the light emission angle, causing part of the light to be reflected to the structural area of ​​the fourth lens to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f45 / EP34 within a reasonable range to adjust the deflection angle of the light in the fourth lens and the fifth lens, while ensuring that the light converges to the sixth lens, reducing large-angle light, which is conducive to reducing the generation of stray light. At the same time, constraining the spacing distance EP34 between the third spacing element and the fourth spacing element can constrain the edge thickness range of the fourth lens, which is conducive to controlling the structural form of the fourth lens, reducing the generation of weld marks, and avoiding the risk of stray light at the weld marks.

[0055] In addition, by constraining the ranges of (CP4+CT4) / T34 and f45 / EP34 within a reasonable range, it is possible to balance physical size and optical performance, avoid aberration problems caused by excessive focal length, excessive thickness, or excessive air spacing, and help adjust the size of field curvature, reduce chromatic aberration, distortion and other problems caused by air spacing, improve the resolution of the lens, improve the imaging quality of the lens, and ensure the processability of the fourth lens.

[0056] In addition, refer to Table 1 and Figures 18 to 23 As shown, Fig.18 The stray light path diagram of the optical lens when (CP4+CT4) / T34=1.5 and f45 / EP34=22.30 is shown. Fig.19 Shows Fig.18 The stray light spot diagram of the optical lens. Fig. 20 The stray light path diagram of the optical lens when (CP4+CT4) / T34=1.5 and f45 / EP34=15 is shown. Fig.21 Shows Fig. 20 The stray light spot diagram of the optical lens. Fig. 22 The figure shows a partial optical path diagram of the optical lens when (CP4+CT4) / T34=1.5 and f45 / EP34=30. Fig.23 Shows Fig. 22 The stray light spot diagram of the optical lens.

[0057] Depend on Figures 18 to 23 As shown, when the optical lens meets (CP4+CT4) / T34=1.5, f45 / EP34=22.30, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical lens meets (CP4+CT4) / T34=1.5, f45 / EP34=15, the stray light energy is strong, the stray light has a greater impact on the imaging quality, and the performance is poor. When the optical lens meets (CP4+CT4) / T34=1.5, f45 / EP34=30, the stray light energy is strong, the stray light has a greater impact on the imaging quality, and the performance is poor. It can be seen that when the range of 1.07≤(CP4+CT4) / T34≤1.5, 18.82≤f45 / EP34≤24.58, the stray light improvement effect of the optical lens is better. Therefore, the present application controls the deflection angle of the light in the fourth lens and the fifth lens by constraining 18.82≤f45 / EP34≤24.58, ensures that the light converges to the sixth lens, reduces large-angle light, and helps reduce the generation of stray light.

[0058]

[0059] Table 1

[0060] It should be noted that the present application limits f45 / EP34 within a reasonable range, constrains the relationship between the fourth lens, the fifth lens, the third spacing element, and the fourth spacing element, so as to improve the stray light generated at the fourth lens, and solve the stray light problem caused when (CP4+CT4) / T34 is within the range of 1.07 to 1.5. When f45 / EP34 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, and the focal length and surface shape of the lens are further optimization of the optical lens on this basis. Each 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 satisfies: 1.07≤(CP4+CT4) / T34≤1.5; 18.82≤f45 / EP34≤24.58, and the optical lens can reduce the influence of stray light while improving the assembly stability.

[0061] For example, in some optional embodiments, the first lens has a positive focal length, and by constraining the first lens to have a positive focal length, 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 second lens has a negative focal length, which can balance the aberration caused by the first lens and improve the imaging quality. For another example, in some optional embodiments, the third lens has a positive focal length, which appropriately converges the light so that the light smoothly transitions to the rear. For another example, in some optional embodiments, the fourth lens has a negative focal length, which can balance the aberration caused by the third lens and improve the imaging quality. For another example, in some optional embodiments, the fifth lens has a positive focal length, and by constraining the fifth lens to have a positive focal length, it is beneficial for the 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 a positive focal length, and by constraining the sixth lens to have a positive focal length, it is beneficial for the 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 a negative focal length. By constraining the seventh lens to have a negative focal length, it is beneficial for the light to diverge appropriately when passing through the seventh lens, while balancing the aberration caused by the positive lens in front, and improving the imaging quality. For another example, in some optional embodiments, the object side of the first lens is convex, and the image side of the first lens is concave; the object side of the second lens is convex, and the image side of the second lens is concave; the image side of the third lens is convex; the object side of the fourth lens is convex, and the image side of the fourth lens is concave; the object side of the fifth lens is convex, and the image side of the fifth lens is convex; the object side of the sixth lens is convex, and the image side of the sixth lens is convex; the object side of the seventh lens is concave, and the image side of the seventh lens is concave. By reasonably constraining the surface shape of each lens, it is beneficial to reasonably constrain the light trend, ensure a smooth transition of the light, and 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 the software and / or tools mentioned above, the surface profile of each lens can be simulated and appropriately adjusted according to the surface profile provided by the software and / or tools used.

[0062] In some optional embodiments, the radius of curvature R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth spacer element, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy the following relationship: 2.11≤R8 / (D4s-d4s)≤6.63. Restricting R8 / (D4s-d4s) within a reasonable range constrains the curvature of the image side surface of the fourth lens, which is beneficial to controlling the angle of light after it is emitted from the fourth lens. At the same time, constraining the outer diameter and inner diameter of the object side surface of the fourth spacer element can effectively ensure that the imaging light passes through the fourth spacer element smoothly, and the stray light outside the field of view can be blocked by the fourth spacer element, which is beneficial to improving the imaging clarity. At the same time, the supporting width of the fourth spacer element can be guaranteed to ensure the supporting force of the fourth spacer element on the front and rear lenses, which is beneficial to ensuring the assembly stability of the optical lens.

[0063] In some optional embodiments, the radius of curvature R5 of the object side surface of the third lens, the center thickness CT3 of the third lens on the optical axis, and the maximum thickness CP3 of the third spacer element satisfy: 2.1mm≤|R5| / (CT3 / CP3)≤6.22mm. By constraining |R5| / (CT3 / CP3) within a reasonable range, the structural strength of the third spacer element and the third lens can be guaranteed, the risk of deformation of the third spacer element caused by assembly pressure during assembly can be avoided, and the risk of the third lens being broken due to improper force can be reduced, which is conducive to improving the assembly stability of the optical lens. At the same time, by constraining the curvature of the object side surface of the third lens, the degree of deflection of light when entering the third lens can be controlled. At the same time, adjusting the thickness of the third spacer element can adjust the field curvature, improve the resolution of the optical lens, and improve the imaging quality of the optical lens.

[0064] In some optional embodiments, the curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacer element, and the inner diameter d3s of the object side surface of the third spacer element satisfy: -13.29≤R6 / (D3s-d3s)≤-3.55. By constraining R6 / (D3s-d3s) within a reasonable range, the curvature of the image side surface of the third lens is constrained, the angle of light from the image side surface of the third lens can be controlled, and the deflection of large-angle light can be reduced. At the same time, constraining the outer diameter and inner diameter of the object side surface of the third spacer element can effectively ensure that the imaging light emitted by the third lens passes through the third spacer element smoothly, and the stray light outside the field of view can be blocked by the third spacer element, which is beneficial to improving the imaging clarity. At the same time, the bearing width of the third spacer element can be guaranteed to ensure the bearing force of the third spacer element on the third lens and the fourth lens, which is beneficial to ensure the assembly stability of the optical lens.

[0065] In some optional embodiments, the spacer element assembly further includes a second spacer element, 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 center thickness CT3 of the third lens on the optical axis, the air interval T23 between the second lens and the third lens on the optical axis, and the interval distance EP23 between the second spacer element and the third spacer element satisfy: 2.18≤(EP23+CT3) / T23≤3.32. By constraining (EP23+CT3) / T23 within a reasonable range, it is beneficial to allocate the positions of the second lens and the third lens in the lens barrel and the space size occupied to ensure the miniaturization of the optical lens. At the same time, by constraining the distance between the second spacer element and the third spacer element, the edge thickness of the second lens can be guaranteed to be within a reasonable range, which is beneficial to controlling the structural form of the second lens and the third lens, and the overall thickness ratio is more reasonable, which is beneficial to the molding of the second lens and the third lens. At the same time, constraining the air interval between the second lens and the third lens on the optical axis can reduce the sensitivity of the optical lens to the change of the air interval, which is beneficial to improving the imaging quality.

[0066] In some optional embodiments, the spacer element assembly further 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 spacing distance EP34 between the third spacer element and the fourth spacer element and the axial distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: -3.1≤EP34 / SAG41≤-1.85. By constraining EP34 / SAG41 within a reasonable range, it is beneficial to constrain the structural form of the fourth lens, ensure the overall thickness ratio of the fourth lens, constrain the sagittal height of the object side surface of the fourth lens, and help control the overall form of the fourth lens. At the same time, constraining the spacing distance between the third spacer element and the fourth spacer element can constrain the relative distance between the third lens and the fifth lens, which is beneficial to constrain the thickness of the fourth lens, ensure the overall thickness ratio of the fourth lens, and further help ensure the structural strength of the fourth lens and reduce the difficulty of assembly.

[0067] In some optional embodiments, the spacer element assembly 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 outer diameter D5s of the object side surface of the fifth spacer element and the curvature radius R10 of the image side surface of the fifth lens satisfy: -1.63≤R10 / D5s≤-1.33. By constraining R10 / D5s within a reasonable range, the curvature degree of the image side surface of the fifth lens can be controlled, which is beneficial to controlling the exit angle of light from the fifth lens, reducing the deflection of light at large angles, and helping to reduce the generation of stray light and reduce the sensitivity of the optical system. At the same time, ensuring the outer diameter of the fifth spacer element can constrain the bearing range between the fifth spacer element and the fifth lens, ensuring that the fifth spacer element does not block light while ensuring assembly stability.

[0068] In some optional embodiments, the spacer element assembly 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 inner diameter d0m of the image side surface of the lens barrel, the refractive index N7 of the seventh lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy: -4.27≤d0m*N7 / R13≤-3.82. By constraining d0m*N7 / R13 within a reasonable range, the light deflection capability of the seventh lens can be optimized, thereby reducing common aberrations such as spherical aberration, coma or astigmatism. Matching with the inner diameter d0m of the image side surface of the lens barrel can also control the range of light emitted from the seventh lens, ensuring that the imaging light is smoothly incident on the imaging surface, reducing the generation of stray light, ensuring light transmission efficiency and improving imaging quality.

[0069] In some optional embodiments, the spacer element assembly 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, and the outer diameter D6m of the image side surface of the sixth spacer element and the curvature radius R14 of the image side surface of the seventh lens satisfy: 3.78≤D6m / R14≤4.25. By constraining D6m / R14 within a reasonable range, it is helpful to control the bearing range of the sixth spacer element on the seventh lens, so as to ensure the assembly stability of the seventh lens while constraining the exit angle of the light from the seventh lens, so as to control the CRA of the optical lens and the CRA of the chip to match, reduce the sensitivity of the optical system, and improve the imaging quality.

[0070] In some optional embodiments, the spacer element assembly 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 inner diameter d6s of the object side surface of the sixth spacer element, the outer diameter D6s of the object side surface of the sixth spacer element, and the curvature radius R12 of the image side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.01. By constraining R12 / (D6s-d6s) within a reasonable range, the supporting width of the sixth spacer element and the sixth lens can be constrained to ensure the stability of the sixth lens assembly, while constraining the curvature of the image side surface of the sixth lens, controlling the angle of light emitted through the sixth lens, ensuring that the imaging light passes smoothly through the sixth spacer element, and adjusting the field curvature to reduce aberrations. The sixth spacer element can also block stray light outside the field of view, ensuring the imaging clarity when the light is transmitted from the sixth lens to the seventh lens, which is conducive to improving the imaging quality.

[0071] In some optional embodiments, the spacer element assembly further includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts the image side surface of the sixth lens, and the maximum thickness CP6 of the sixth spacer element and the effective focal length f7 of the seventh lens satisfy: -8.9≤f7 / CP6≤-5.87. By controlling the ratio of the effective focal length of the seventh lens and the maximum thickness of the sixth spacer element within a certain range, the physical size and optical performance can be balanced, and the aberration problem caused by the excessive focal length or the excessive air gap between the lenses can be avoided. The reasonable control of the ratio can enhance the stability of the system and reduce the influence of temperature changes or vibrations on the imaging quality.

[0072] In some optional embodiments, the spacer element assembly 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 spacing distance EP56 between the fifth spacer element and the sixth spacer element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28. By constraining (CT6+T56) / EP56 within a reasonable range, it is helpful to constrain the relative position of the fifth spacer element and the sixth spacer element, and then effectively constrain the edge thickness of the sixth lens within a reasonable range, and effectively constrain the overall thickness ratio of the sixth lens, which is beneficial to the molding of the sixth lens while ensuring the structural strength of the sixth lens, and is beneficial to improving the assembly stability, while constraining the air spacing between the fifth lens and the sixth lens, and reducing the sensitivity of the optical lens caused by the change of the air spacing.

[0073] In another optional embodiment, 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, 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 arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly includes at least 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 spacing distance EP56 between the fifth spacer element and the sixth spacer element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28; the inner diameter d0m of the image side end surface of the lens barrel, the refractive index N7 of the seventh lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy: -4.27≤d0m*N7 / R13≤-3.82.

[0074] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the spacing distance EP56 between the fifth spacer element and the sixth spacer element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy the following conditions: 2.59≤(CT6+T56) / EP56≤3.28, the relative position of the fifth spacer element and the sixth spacer element can be constrained, and the edge thickness of the sixth lens can be effectively constrained within a reasonable range, and the overall thickness ratio of the sixth lens can be effectively constrained, which is beneficial to the molding of the sixth lens while ensuring the structural strength of the sixth lens, and is beneficial to improving the assembly stability. However, this easily leads to a small rear end space of the optical lens and a small process operation space, which leads to a small degree of freedom in the design of the optical elements at the rear end, increases the difficulty of improving stray light, and affects the imaging quality. In order to reduce the generation of stray light, the present application constrains d0m*N7 / R13 within a reasonable range, optimizes the light deflection ability of the seventh lens, thereby reducing common aberrations such as spherical aberration, coma or astigmatism, and matches the inner diameter d0m of the image-side end face of the lens barrel. It can also control the range of light emitted from the seventh lens, ensure that the imaging light is smoothly incident on the imaging surface, reduce the risk of the lens barrel reflecting the light back to the optical system, and thus help reduce the generation of stray light, ensure the light transmission efficiency and improve the imaging quality.

[0075] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0076] In another optional embodiment, 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, 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 arranged in sequence from the object side to the image side along the optical axis; the spacer element assembly includes at least a second spacer element and a third spacer element, the second spacer element is located between the second lens and the third lens and is in contact with the image side portion of the second lens, and the third spacer element is located between the third lens and the fourth lens and is in contact with the image side portion of the third lens , the fourth spacer element is located between the fourth lens and the fifth lens and contacts with the image side surface portion of the fourth lens; the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacer element and the third spacer element satisfy: 2.18≤(EP23+CT3) / T23≤3.32; the inner diameter d3m of the image side surface of the third spacer element, the refractive index N4 of the fourth lens, and the curvature radius R8 of the image side surface of the fourth lens satisfy: 3.59≤R8*N4 / d3m≤5.46.

[0077] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacer element and the third spacer element satisfy the following conditions: 2.18≤(EP23+CT3) / T23≤3.32, it is beneficial to allocate the positions of the second lens and the third lens in the lens barrel and the size of the space they occupy, so as to ensure the miniaturization of the optical lens, constrain the distance between the second spacer element and the third spacer element and the center thickness of the third lens, and is beneficial to ensure the relative positions of the third lens and the spacer elements on both sides of the third lens, so as to ensure the stability of the bearing between the second spacer element, the third lens and the third spacer element, and is beneficial to improving the assembly stability. At the same time, the air gap between the second lens and the third lens on the optical axis is constrained to reduce the influence of the air gap on the imaging performance, reduce the sensitivity of the optical system, and avoid collision with the second lens during the assembly process. However, this can easily lead to a large deflection of the surface of the third lens in the connection area between the optical structure area and the optical effective area, causing part of the surface of the optical structure area to face the optical axis side, where light is easily reflected to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains R8*N4 / d3m within a reasonable range, controls the deflection ability of the fourth lens to light, reduces the light reflected to the optical structure area of ​​the third lens, reduces the generation of stray light, and controls the angle of light when it is emitted through the fourth lens, so as to reduce the generation of rear stray light. Matching the inner diameter of the third spacing element can also control the incident angle of the light entering the object side of the fourth lens. While ensuring that the imaging light passes smoothly through the third spacing element into the fourth lens, the third spacing element can block part of the non-imaging light, reduce the generation of stray light, and ensure the light transmission efficiency while improving the imaging quality.

[0078] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0079] 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.

[0080] 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.

[0081] Optionally, the optical lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Figure 1 A schematic diagram of the dimension marking of an optical lens of the present application is shown. Figure 1 Parameters such as d3s, D3s, d4s, D4s, D5s, d6s, D6s, D6m, CP3, CP4, CP6, 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.

[0086] 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.

[0087] 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.

[0088] It should be noted that any of the following embodiments 1 to 4 are applicable to all implementation methods of the present application.

[0089] Embodiment 1

[0090] like Figures 2 to 5 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.

[0091] like Figure 2 and Figure 3 As shown, the optical lens includes a lens barrel, seven lenses and multiple spacing elements. The lens barrel 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, a sixth auxiliary spacing element P6b and a seventh lens E7, which are arranged in sequence from the object side to the image side.

[0092] like Figure 2FIG. 1 is a schematic diagram of the structure of the optical lens of Example 1-1. In this example, the object side surface S1 of the first lens is in contact with the lens barrel. The object side surface and image side surface of the first spacer element P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, the object side surface and image side surface of the second spacer element P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, the object side surface and image side surface of the third spacer element P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, the object side surface and image side surface of the fifth spacer element P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, the object side surface and image side surface of the sixth spacer element P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface of the sixth auxiliary spacer element, the image side surface of the sixth auxiliary spacer element is respectively in contact with the object side surface S13 of the seventh lens, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel.

[0093] 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.

[0094] 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.

[0095] 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 negative 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 positive focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is convex. 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 convex. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is concave, and the image side surface S14 of the seventh lens is concave.

[0096] 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.

[0097]

[0098]

[0099] Table 2

[0100] 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:

[0101]

[0102] 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.

[0103]

[0104]

[0105] Table 3

[0106] 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.

[0107] according to Figure 4 and Figure 5 It can be seen that the optical lens provided in the first embodiment can achieve good imaging quality.

[0108] Embodiment 2

[0109] like Figures 6 to 9 As shown, the optical lens of the second embodiment is described. Figure 6 The structure diagram of the optical lens of Example 2-1 is shown. Figure 7 A schematic structural diagram of the optical lens of Example 2-2 is shown.

[0110] like Figure 6 and Figure 7As shown, the optical lens includes a lens barrel, seven lenses and multiple spacing elements. The lens barrel 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, a sixth auxiliary spacing element P6b and a seventh lens E7, which are arranged in sequence from the object side to the image side.

[0111] like Figure 6 FIG. 2 is a schematic diagram of the structure of the optical lens of Example 2-1. In this example, the object side surface S1 of the first lens is in contact with the lens barrel. The object side surface and image side surface of the first spacer element P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, the object side surface and image side surface of the second spacer element P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, the object side surface and image side surface of the third spacer element P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, the object side surface and image side surface of the fifth spacer element P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, the object side surface and image side surface of the sixth spacer element P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface of the sixth auxiliary spacer element, the image side surface of the sixth auxiliary spacer element is respectively in contact with the object side surface S13 of the seventh lens, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel.

[0112] like Figure 7 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.

[0113] 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.

[0114] 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 negative 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 positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. 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 convex. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is concave, and the image side surface S14 of the seventh lens is concave.

[0115] 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.

[0116]

[0117] Table 4

[0118] 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.

[0119]

[0120]

[0121] Table 5

[0122] Figure 8 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. 9 The astigmatism curve of the optical lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature.

[0123] according to Figure 8 and Fig. 9 It can be seen that the optical lens provided in the second embodiment can achieve good imaging quality.

[0124] Embodiment 3

[0125] like Figures 10 to 13 As shown, the optical lens of embodiment 3 is described. Fig.10 The structure diagram of the optical lens of Example 3-1 is shown. Fig.11 A schematic structural diagram of the optical lens of Example 3-2 is shown.

[0126] like Fig.10 and Fig.11 As shown, the optical lens includes a lens barrel, seven lenses and multiple spacing elements. The lens barrel 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, a sixth auxiliary spacing element P6b and a seventh lens E7, which are arranged in sequence from the object side to the image side.

[0127] like Fig.10 FIG. 3 is a schematic diagram of the structure of the optical lens of Example 3-1. In this example, the object side surface S1 of the first lens abuts against the lens barrel. The object side surface and image side surface of the first spacer element P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, the object side surface and image side surface of the second spacer element P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, the object side surface and image side surface of the third spacer element P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, the object side surface and image side surface of the fifth spacer element P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, the object side surface and image side surface of the sixth spacer element P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface of the sixth auxiliary spacer element, the image side surface of the sixth auxiliary spacer element is respectively in contact with the object side surface S13 of the seventh lens, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel.

[0128] like Fig.11 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.

[0129] 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.

[0130] 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 negative 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 positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. 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 convex. The seventh lens E7 has negative focal power, the object side surface S13 of the seventh lens is concave, and the image side surface S14 of the seventh lens is concave.

[0131] 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.

[0132]

[0133] Table 6

[0134] 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.

[0135]

[0136]

[0137] Table 7

[0138] Fig.12 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.13 The astigmatism curve of the optical lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature.

[0139] according to Fig.12 and Fig.13 It can be seen that the optical lens provided in the third embodiment can achieve good imaging quality.

[0140] Embodiment 4

[0141] like Figures 14 to 17 As shown, the optical lens of embodiment 4 is described. Fig.14 FIG4 is a schematic diagram showing the structure of the optical lens of Example 4-1. Fig.15 A schematic structural diagram of the optical lens of Example 4-2 is shown.

[0142] like Fig.14 and Fig.15 As shown, the optical lens includes a lens barrel, seven lenses and multiple spacing elements. The lens barrel 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, a sixth auxiliary spacing element P6b and a seventh lens E7, which are arranged in sequence from the object side to the image side.

[0143] like Fig.14 FIG. 4 is a schematic diagram of the structure of the optical lens of Example 4-1. In this example, the object side surface S1 of the first lens abuts against the lens barrel. The object side surface and image side surface of the first spacer element P1 are respectively in contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, the object side surface and image side surface of the second spacer element P2 are respectively in contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, the object side surface and image side surface of the third spacer element P3 are respectively in contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element P4 are respectively in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, the object side surface and image side surface of the fifth spacer element P5 are respectively in contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, the object side surface and image side surface of the sixth spacer element P6 are respectively in contact with the image side surface S12 of the sixth lens and the object side surface of the sixth auxiliary spacer element, the image side surface of the sixth auxiliary spacer element is respectively in contact with the object side surface S13 of the seventh lens, and the image side surface S14 of the seventh lens is spaced apart from the lens barrel.

[0144] like Fig.15 , 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.

[0145] 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.

[0146] In Embodiment 4, the first lens E1 has positive 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 negative 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 positive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has negative 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 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 power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is convex. The seventh lens E7 has negative power, the object side surface S13 of the seventh lens is concave, and the image side surface S14 of the seventh lens is concave.

[0147] 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.

[0148]

[0149] Table 8

[0150] 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.

[0151] Face number A4 A6 A8 A10 A12 A14 A16 S1 7.4636E-03 8.5174E-04 1.2659E-04 6.9833E-05 1.1487E-05 6.7668E-06 -1.6271E-06 S2 -1.3808E-02 3.7071E-03 -3.3724E-04 8.5688E-05 -2.2154E-05 -6.6450E-06 -2.3275E-06 S3 -2.6337E-02 8.0020E-03 -6.2786E-04 -7.6924E-06 -5.6175E-05 -1.3342E-05 -5.3692E-06 S4 1.6577E-02 1.0172E-02 1.0356E-03 2.7346E-04 4.1659E-05 4.8384E-06 2.8712E-06 S5 -8.3300E-02 -6.0995E-03 -2.7360E-04 1.8329E-04 2.9036E-05 3.4706E-05 2.3428E-06 S6 -1.6156E-01 -1.2970E-02 -2.1462E-03 -6.8277E-04 -4.8140E-04 -2.1770E-04 -8.9424E-05 S7 -3.0371E-01 3.2429E-02 2.0027E-03 -4.5402E-04 -1.4497E-03 -1.9830E-04 5.8531E-05 S8 -5.2548E-01 1.0900E-01 6.1697E-03 -2.9992E-03 -4.0700E-03 3.5278E-04 5.2407E-04 S9 -6.9852E-01 -4.0319E-02 1.0363E-02 1.0423E-02 -7.6430E-03 2.6587E-04 2.6246E-03 S10 -2.8190E-01 1.1941E-01 -6.3007E-02 2.1061E-02 -1.7193E-02 1.1979E-02 -1.6323E-03 S11 -1.9566E+00 5.2552E-01 -1.1242E-01 -6.6480E-03 1.1422E-02 3.7592E-03 -6.5503E-03 S12 3.5001E-01 -1.4477E-01 3.5357E-02 -1.5284E-02 2.2989E-02 -4.6867E-03 -5.5930E-04 S13 9.0342E-01 6.8904E-02 -1.1125E-01 7.8500E-02 -5.3232E-02 2.4636E-02 -8.3701E-03 S14 -5.7040E+00 1.2510E+00 -3.4883E-01 1.2239E-01 -7.6185E-02 2.8051E-02 -1.3750E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.3591E-06 -1.1976E-06 1.8348E-07 -7.2686E-07 0.0000E+00 0.0000E+00 0.0000E+00 S2 -1.6119E-06 -7.0544E-07 -1.5621E-06 -3.2431E-07 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.8001E-06 -2.2955E-06 -7.6390E-07 -1.4173E-06 0.0000E+00 0.0000E+00 0.0000E+00 S4 1.3236E-06 7.9374E-07 -9.2970E-09 -5.2587E-08 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.2652E-05 6.3066E-07 4.5779E-06 -8.4028E-07 2.1223E-06 -9.0047E-07 3.7325E-07 S6 -4.9822E-05 -1.7664E-05 -1.3749E-05 -3.7518E-06 -4.5093E-06 1.9406E-07 0.0000E+00 S7 2.2682E-05 -1.7880E-05 -1.3093E-05 -2.6397E-06 2.2687E-06 1.9860E-07 -1.4185E-06 S8 1.4866E-04 -8.7267E-05 -4.0641E-05 1.4797E-06 1.1268E-05 4.0939E-06 -4.6763E-06 S9 1.0449E-03 -5.4886E-04 -1.6665E-04 -2.4857E-05 3.8149E-05 -3.0821E-07 -6.4269E-06 S10 -2.9414E-03 6.7935E-04 1.3926E-03 -8.3338E-04 -6.6296E-06 9.6772E-05 -4.3798E-06 S11 1.9833E-03 -3.9085E-04 6.3162E-04 -4.4205E-04 6.4574E-05 -1.3001E-05 7.6085E-06 S12 -1.4199E-03 5.7925E-04 -2.0759E-04 -5.0449E-04 1.2050E-04 3.8152E-05 -2.3564E-05 S13 2.7909E-03 -4.6380E-04 -1.3230E-03 2.1632E-03 -1.7735E-03 8.4701E-04 -1.8758E-04 S14 8.9950E-03 -3.9990E-03 3.2386E-04 2.5151E-04 3.4216E-04 -7.6999E-05 -7.8126E-05

[0152] Table 9

[0153] Fig.16 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.17 The astigmatism curve of the optical lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature.

[0154] according to Fig.16 and Fig.17 It can be seen that the optical lens provided in the fourth embodiment can achieve good imaging quality.

[0155] In summary, the optical lenses of Embodiments 1 to 4 respectively satisfy the relationship shown in Table 10.

[0156]

[0157]

[0158] Table 10

[0159] Table 11 shows some parameters of the optical lenses of Examples 1 to 4 (unit: mm).

[0160] Parameters / Examples 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 d3s 2.812 2.963 2.824 2.824 2.572 2.572 2.680 2.680 D3s 5.500 5.100 5.320 5.120 5.320 5.720 5.160 4.860 d3m 2.824 2.824 2.572 2.572 2.680 2.680 2.824 2.824 d4s 4.038 4.038 3.682 3.682 3.611 3.611 3.688 3.688 D4s 5.463 5.463 5.235 5.035 6.900 7.100 6.740 6.540 D5s 7.200 7.200 7.000 6.900 7.000 7.200 6.840 6.840 d6s 6.585 6.585 6.299 6.299 6.299 6.299 6.398 6.398 D6s 8.263 8.263 8.263 8.479 8.263 8.263 7.873 7.873 D6m 8.914 8.914 8.714 8.264 8.714 8.614 8.554 8.454 CP3 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 CP4 0.204 0.204 0.159 0.159 0.022 0.022 0.022 0.022 CP6 0.297 0.297 0.367 0.367 0.297 0.297 0.243 0.243 EP23 0.420 0.540 0.475 0.475 0.415 0.415 0.415 0.415 EP34 0.647 0.547 0.567 0.567 0.713 0.713 0.633 0.633 EP45 0.243 0.281 0.342 0.342 0.454 0.454 0.354 0.354 EP56 0.235 0.212 0.241 0.241 0.221 0.221 0.240 0.240 f1 4.77 4.77 4.56 4.56 4.62 4.62 4.35 4.35 f2 -13.95 -13.95 -12.56 -12.56 -12.92 -12.92 -11.22 -11.22 f3 18.82 18.82 18.80 18.80 17.38 17.38 29.05 29.05 f4 -13.42 -13.42 -13.69 -13.69 -12.36 -12.36 -16.35 -16.35 f5 6.58 6.58 7.15 7.15 7.25 7.25 7.02 7.02 f6 4.15 4.15 4.07 4.07 4.07 4.07 3.94 3.94 f7 -2.09 -2.09 -2.15 -2.15 -2.18 -2.18 -2.16 -2.16 f45 12.20 12.20 13.95 13.95 15.99 15.99 11.91 11.91 SAG41 -0.30 -0.30 -0.28 -0.28 -0.25 -0.25 -0.20 -0.20

[0161] Table 11

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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 a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; The spacer element assembly 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 surface of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens; The center thickness CT4 of the fourth lens on the optical axis, the air interval T34 between the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacing element satisfy the following: 1.07≤(CP4+CT4) / T34≤1.5; The combined focal length f45 of the fourth lens and the fifth lens and the spacing distance EP34 between the third spacing element and the fourth spacing element satisfy the following: 18.82≤f45 / EP34≤24.

58.

2. The optical lens according to claim 1, characterized in that: The image side surface of the fourth lens is a concave surface, and the curvature radius R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side of the fourth spacing element, and the inner diameter d4s of the object side of the fourth spacing element satisfy: 2.11≤R8 / (D4s-d4s)≤6.

63.

3. The optical lens according to claim 1, characterized in that: The curvature radius R5 of the object side surface of the third lens, the center thickness CT3 of the third lens on the optical axis, and the maximum thickness CP3 of the third spacer element satisfy the following: 2.1 mm≤|R5| / (CT3 / CP3)≤6.22 mm.

4. The optical lens according to claim 1, characterized in that: The image side surface of the third lens is convex, and the curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacing element, and the inner diameter d3s of the object side surface of the third spacing element satisfy the following: -13.29≤R6 / (D3s-d3s)≤-3.

55.

5. The optical lens according to claim 1, characterized in that: The spacer element assembly also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens. The center thickness CT3 of the third lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacer element and the third spacer element satisfy the following: 2.18≤(EP23+CT3) / T23≤3.

32.

6. The optical lens according to claim 1, characterized in that: The spacing distance EP34 between the third spacing element and the fourth spacing element and the on-axis distance SAG41 between the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens satisfy: -3.1≤EP34 / SAG41≤-1.

85.

7. The optical lens according to claim 1, characterized in that: The image side surface of the fifth lens is a convex surface. The spacer element assembly 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 outer diameter D5s of the object side surface of the fifth spacer element and the curvature radius R10 of the image side surface of the fifth lens satisfy the following relationship: -1.63≤R10 / D5s≤-1.

33.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The object side surface of the seventh lens is a concave surface, and the inner diameter d0m of the image side end surface of the lens barrel, the refractive index N7 of the seventh lens, and the curvature radius R13 of the object side surface of the seventh lens satisfy: -4.27≤d0m*N7 / R13≤-3.

82.

9. The optical lens according to any one of claims 1 to 7, characterized in that: The image side surface of the seventh lens is a concave surface, and the spacer element assembly 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, and an outer diameter D6m of the image side surface of the sixth spacer element and a curvature radius R14 of the image side surface of the seventh lens satisfy the following relationship: 3.78≤D6m / R14≤4.

25.

10. The optical lens according to any one of claims 1 to 7, characterized in that: The image side surface of the sixth lens is a convex surface, and the spacer element assembly also 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, and the inner diameter d6s of the object side surface of the sixth spacer element, the outer diameter D6s of the object side surface of the sixth spacer element, and the curvature radius R12 of the image side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.

01.

11. The optical lens according to any one of claims 1 to 7, characterized in that: The seventh lens has negative optical power, and the spacer element assembly also 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 maximum thickness CP6 of the sixth spacer element and the effective focal length f7 of the seventh lens satisfy the following: -8.9≤f7 / CP6≤-5.

87.

12. The optical lens according to any one of claims 1 to 7, characterized in that: The spacer element assembly 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 spacing distance EP56 between the fifth spacer element and the sixth spacer element, the center thickness CT6 of the sixth lens on the optical axis, and the air spacing T56 between the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.

28.

13. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens meets at least one of the following requirements: The first lens has positive power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; The fourth lens has negative optical power, and the object side surface of the fourth lens is a convex surface; The fifth lens has positive optical power, and the object side surface of the fifth lens is a convex surface; The sixth lens has positive refractive power, and the object side surface of the sixth lens is a convex surface.

14. The optical lens according to any one of claims 1 to 7, characterized in that: The optical lens meets at least one of the following requirements: The second lens has negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave; The third lens has positive refractive power.

Images