Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, and first to seventh lenses and a spacing element group which are arranged in the lens barrel. The spacing element group at least comprises a sixth spacing element, and the sixth spacing element is located between the sixth lens and the seventh lens and makes contact with the image side face part of the sixth lens; the curvature radius R12 of the image side surface of the sixth lens and the outer diameter D6s of the object side surface of the sixth spacing element meet the following condition:-2.0 < = D6s / R12 < =-1.56; the curvature radius R13 of the object side surface of the seventh lens and the outer diameter D6m of the image side surface of the sixth spacing element satisfy the following relation:-2.47 < = D6m / R13 < =-1.81. 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. The lens behind the optical lens is used to provide support for the front lens. If the stability of the lens behind the optical lens is poor, it is easy to cause the lens in the entire optical lens to shift. In some optical lenses, in order to improve the assembly stability of the lens behind 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 purpose, 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 along the optical axis from the object side to the image side; the spacer element group comprises at least a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and is in contact with the image side surface portion of the sixth lens; the curvature radius R12 of the image side surface of the sixth lens and the outer diameter D6s of the object side surface of the sixth spacer element satisfy the following relationship: -2.0≤D6s / R12≤-1.56; the curvature radius R13 of the object side surface of the seventh lens and the outer diameter D6m of the image side surface of the sixth spacer element satisfy the following relationship: -2.47≤D6m / R13≤-1.81.

[0006] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consisting of seven lenses, 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 along the optical axis from the object side to the image side; the spacer element group comprises at least a first spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface portion of the first lens; the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element satisfy the following relationship: 2.98≤f1 / (EP01+CT1)≤3.82; the inner diameter d1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy the following relationship: 2.3≤R2 / d1s≤6.31.

[0007] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consisting of seven lenses, 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 along the optical axis from the object side to the image side; the spacer element group comprises at least a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens; the inner diameter d4m of the image side surface of the fourth spacer element and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: 1.06≤R9 / d4m≤1.97; the center thickness CT4 of the fourth lens, the spacing distance EP34 between the third spacer element and the fourth spacer element, and the air spacing T34 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 0.97≤(CT4+T45) / EP34≤3.64.

[0008] Furthermore, the spacer element group also includes a first spacer element, which is located between the first lens and the second lens and contacts the image side portion of the first lens, and the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacer element satisfy: 2.98≤f1 / (EP01+CT1)≤3.82.

[0009] Furthermore, the spacer element group also includes a first spacer element, which is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy: 2.3≤R2 / d1s≤6.31.

[0010] Furthermore, the spacer element group also includes a first spacer element, which is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the inner diameter d1m of the image side surface of the first spacer element and the curvature radius R3 of the object side surface of the second lens satisfy: 1.17≤R3 / d1m≤2.78.

[0011] Furthermore, the spacer element group also includes a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and contacts the image side portion of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens, and the spacing distance EP12 between the first spacer element and the second spacer element and the effective focal length f2 of the second lens satisfy: -31.77≤f2 / EP12≤-14.59.

[0012] Furthermore, the spacer element group 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, and the curvature radius R4 of the image side surface of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object side surface of the second spacer element satisfy: 2.15≤R4*N2 / d2s≤2.93.

[0013] Furthermore, the spacer element group also includes 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 portion of the second lens. 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 spacing distance EP23 between the second spacer element and the third spacer element and the effective focal length f3 of the third lens satisfy: 40.9≤f3 / EP23≤89.42.

[0014] Furthermore, the spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the outer diameter D3s of the object side of the third spacer element and the curvature radius R6 of the image side of the third lens satisfy: -3.5≤R6 / D3s≤-1.79.

[0015] Furthermore, the spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the outer diameter D3m of the image side surface of the third spacer element and the curvature radius R7 of the object side surface of the fourth lens satisfy: 3.06≤R7 / D3m≤7.22.

[0016] Furthermore, the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The inner diameter d4m of the image side of the fourth spacer element and the curvature radius R9 of the object side of the fifth lens satisfy: 1.06≤R9 / d4m≤1.97.

[0017] Furthermore, the spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the outer diameter D5s of the object side surface of the fifth spacer element, the inner 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: -8.5≤R10 / (D5s-d5s)≤-5.03.

[0018] Furthermore, the spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and contacts the image side portion of the fifth lens, and the outer diameter D5m of the image side of the fifth spacer element, the inner diameter d5m of the image side of the fifth spacer element, and the curvature radius R11 of the object side of the sixth lens satisfy: 2.32≤R11 / (D5m-d5m)≤4.62.

[0019] Further, the optical lens satisfies at least one of the following: the first lens has positive optical power; the second lens has negative optical power; the third lens has positive optical power; the fourth lens has negative optical power; the fifth lens has positive optical power; the sixth lens has positive optical power; and the seventh lens has negative optical power.

[0020] Further, the optical lens satisfies at least one of the following: the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the image side surface of the third lens is convex; the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave; the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex; the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is concave.

[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 comprises 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 along the optical axis from the object side to the image side; the spacer element group comprises at least a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and is in contact with the image side surface portion of the sixth lens; the curvature radius R12 of the image side surface of the sixth lens and the outer diameter D6s of the object side surface of the sixth spacer element satisfy the following relationship: -2.0≤D6s / R12≤-1.56; the curvature radius R13 of the object side surface of the seventh lens and the outer diameter D6m of the image side surface of the sixth spacer element satisfy the following relationship: -2.47≤D6m / R13≤-1.81.

[0022] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the curvature radius R12 of the image side of the sixth lens and the outer diameter D6s of the object side of the sixth spacer element satisfy: -2.0≤D6s / R12≤-1.56, the bearing position and bearing area between the sixth spacer element and the sixth lens can be constrained to ensure the bearing force of the sixth spacer element on the sixth lens, which is conducive to improving the assembly stability of the sixth lens. At the same time, constraining the angle of light emission from the sixth lens is conducive to the convergence of light into the seventh lens, which is conducive to the reasonable distribution of optical apertures, making the optical system compact. However, it is easy to cause the position of the sixth spacer element to reflect stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains D6m / R13 within a reasonable range, adjusts the angle of light incident on the object side of the seventh lens, reduces the light deflected at a large angle from entering the seventh lens, reduces the generation of stray light, and improves the imaging quality. 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] Figures 4 to 6 The axial chromatic aberration, astigmatism curve and magnification chromatic aberration curve of the optical lens of the first embodiment of the present invention are respectively shown;

[0028] Figure 7 A schematic structural diagram of an optical lens according to Embodiment 2-1 of the present invention is shown;

[0029] Figure 8 A schematic structural diagram of an optical lens according to Embodiment 2-2 of the present invention is shown;

[0030] Figures 9 to 11 The axial chromatic aberration, astigmatism curve and magnification chromatic aberration curve of the optical lens of the second embodiment of the present invention are respectively shown;

[0031] Fig.12 A schematic structural diagram of an optical lens according to Embodiment 3-1 of the present invention is shown;

[0032] Fig.13 A schematic structural diagram of an optical lens according to Embodiment 3-2 of the present invention is shown;

[0033] Figures 14 to 16 The axial chromatic aberration, astigmatism curve and magnification chromatic aberration curve of the optical lens of the third embodiment of the present invention are respectively shown;

[0034] Fig.17 A schematic structural diagram of an optical lens according to Embodiment 4-1 of the present invention is shown;

[0035] Fig.18 A schematic structural diagram of an optical lens according to Embodiment 4-2 of the present invention is shown;

[0036] Figures 19 to 21 The axial chromatic aberration, astigmatism curve and magnification chromatic aberration curve of the optical lens of the fourth embodiment of the present invention are respectively shown;

[0037] Fig. 22 A stray light path diagram of an optical lens in an optional embodiment of the present invention is shown;

[0038] Fig.23 Shows Fig. 22 The stray light spot diagram of the optical lens;

[0039] Fig.24 A stray light path diagram of a lens in an example optical center is shown;

[0040] Fig.25 Shows Fig.24 The stray light spot diagram of the optical lens;

[0041] Fig.26 Another example of a stray light path diagram of an optical lens in light is shown;

[0042] Fig. 27 Shows Fig.26 The stray light spot diagram of the optical lens.

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

[0044] E1, the first lens; P1, the first spacing element; E2, the second lens; P2, the second spacing element; E3, the third lens P3, the third spacing element; E4, the fourth lens; P4, the fourth spacing element; E5, the fifth lens; P5, the fifth spacing element; 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

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] like Figures 1 to 21 As 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 group includes at least a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and is in contact with the image side surface portion of the sixth lens; the curvature radius R12 of the image side surface of the sixth lens and the outer diameter D6s of the object side surface of the sixth spacer element satisfy: -2.0≤D6s / R12≤-1.56; the curvature radius R13 of the object side surface of the seventh lens and the outer diameter D6m of the image side surface of the sixth spacer element satisfy: -2.47≤D6m / R13≤-1.81.

[0053] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When the curvature radius R12 of the image side of the sixth lens and the outer diameter D6s of the object side of the sixth spacer element satisfy: -2.0≤D6s / R12≤-1.56, the bearing position and bearing area between the sixth spacer element and the sixth lens can be constrained to ensure the bearing force of the sixth spacer element on the sixth lens, which is conducive to improving the assembly stability of the sixth lens. At the same time, constraining the angle of light emission from the sixth lens is conducive to the convergence of light into the seventh lens, which is conducive to the reasonable distribution of optical apertures, making the optical system compact. However, it is easy to cause the position of the sixth spacer element to reflect stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains D6m / R13 within a reasonable range, adjusts the angle of light incident on the object side of the seventh lens, reduces the light deflected at a large angle from entering the seventh lens, reduces the generation of stray light, and improves the imaging quality.

[0054] In addition, constraining the range of D6s / R12 and D6m / R13 within a reasonable range can balance physical size and optical performance, ensuring the compact structure of the optical lens while improving assembly stability, which is conducive to adjusting the clarity of the optical lens, improving optical performance, reducing related stray light, and improving imaging quality.

[0055] In addition, refer to Table 1 and Figure 22 to Figure 27 As shown, Fig. 22 The stray light path diagram of the optical lens when D6s / R12=-1.84 and D6m / R13=-2.24 is shown. Fig.23 Shows Fig. 22 The stray light spot diagram of the optical lens. Fig.24 The stray light path diagram of the optical lens when D6s / R12=-1.84 and D6m / R13=-5 is shown. Fig.25 Shows Fig.24 The stray light spot diagram of the optical lens. Fig.26 The stray light path diagram of the optical lens when D6s / R12=-1.84 and D6m / R13=-1 is shown. Fig. 27 Shows Fig.26 The stray light spot diagram of the optical lens.

[0056] Depend on Figure 22 to Figure 27 As shown, when the optical lens meets D6s / R12=-1.84, D6m / R13=-2.24, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical lens meets D6s / R12=-1.84, D6m / R13=-5, the stray light energy is strong, the stray light has a greater impact on the image quality, and the performance is poor. When the optical lens meets D6s / R12=-1.84, D6m / R13=-1, the stray light energy is strong, the stray light has a greater impact on the image quality, and the performance is poor. It can be seen that when D6m / R13 is in the range of -2.47 to -1.81, the stray light improvement effect of the optical lens is better. Therefore, the present application controls the deflection angle of light in the seventh lens by constraining -2.47≤D6m / R13≤-1.81, reduces the light deflected at a large angle entering the seventh lens, and is beneficial to reducing the generation of stray light.

[0057]

[0058] Table 1

[0059] It should be noted that the present application limits D6m / R13 within a reasonable range, constrains the relationship between the sixth spacing element and the seventh transparent element, so as to reduce the stray light caused by the light deflected at a large angle entering the seventh lens, and solves the stray light problem caused by D6s / R12 in the range of -2.0 to -1.56. When D6m / R13 meets the above range, the purpose of improving stray light can be achieved, and it does not depend on the focal length of the lens and the surface shape of the lens. The focal length and surface shape of the lens are further optimization of the optical lens on this basis. 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. When the optical system meets: -2.0≤D6s / R12≤-1.56; -2.47≤D6m / R13≤-1.81, the optical lens can reduce the influence of stray light while improving the assembly stability.

[0060] 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 optical power. By constraining the seventh lens to have a negative optical power, 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.

[0061] In some optional embodiments, the spacer element group further includes a first spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element satisfy: 2.98≤f1 / (EP01+CT1)≤3.82. By constraining f1 / (EP01+CT1) within a reasonable range, the edge thickness and center thickness of the first lens are constrained while ensuring the structural strength of the lens barrel, which is conducive to ensuring the structural form of the first lens, improving the processability of the first lens, and reasonably controlling the range of the optical power of the first lens, which can contribute reasonable positive third-order spherical aberration and negative fifth-order spherical aberration, balance the negative third-order spherical aberration and positive fifth-order spherical aberration generated by the rear optical element, so that the optical system has a smaller spherical aberration and ensures good imaging quality of the on-axis field of view.

[0062] In some optional embodiments, the spacer element group further includes a first spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy: 2.3≤R2 / d1s≤6.31. By constraining R2 / d1s within a reasonable range, the angle at which light is emitted from the object side surface of the first lens can be controlled to ensure that the imaging light is smoothly emitted through the first spacer element. At the same time, the first spacer element can intercept stray light at the edge of the optical effective diameter of the first lens, reduce stray light from entering the rear optical system, and help improve the imaging quality of the optical lens.

[0063] In some optional embodiments, the spacer element group further includes a first spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the inner diameter d1m of the image side surface of the first spacer element and the curvature radius R3 of the object side surface of the second lens satisfy: 1.17≤R3 / d1m≤2.78. By constraining R3 / d1m within a reasonable range, the light reflected in the first lens and the second lens can be effectively shielded, reducing the risk of stray light generation, and controlling the deflection angle of the light in the second lens, which is conducive to the smooth entry of the imaging light into the second lens, and at the same time, the shape of the second lens can be guaranteed, reducing the difficulty of processing the second lens while reducing the size of the front end of the optical lens, which is conducive to the miniaturization of the optical lens.

[0064] In some optional embodiments, the spacer element group further includes a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and contacts the image side portion of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens, and the spacing distance EP12 between the first spacer element and the second spacer element and the effective focal length f2 of the second lens satisfy: -31.77≤f2 / EP12≤-14.59. By constraining f2 / EP12 within a reasonable range, it is helpful to control the relative position of the first spacer element and the second spacer element, ensure the edge thickness of the second lens, ensure the structural strength of the second lens, so as to ensure the assembly stability of the optical lens, and at the same time control the light to be in a divergent state in the second lens, which is helpful to improve the field of view of the optical lens.

[0065] In some optional embodiments, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object side surface of the second spacer element satisfy: 2.15≤R4*N2 / d2s≤2.93. By constraining R4*N2 / d2s within a reasonable range, it is beneficial to control the exit angle of the light from the second lens, so that the second spacer element intercepts the invalid light path while ensuring that the imaging light passes through the second spacer element smoothly, thereby ensuring the imaging quality of the optical lens. By constraining the curvature radius of the image side surface of the second lens and the refractive index of the second lens, it is beneficial to reduce the edge thickness of the second lens, reduce the weight of the lens, and facilitate the ultra-thinning of the optical lens. Constraining the inner diameter of the second spacer element can ensure the bearing range of the second spacer element and the lens, and improve the assembly stability.

[0066] In some optional embodiments, the spacer element group further includes 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 portion of the second lens, 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 spacing distance EP23 between the second spacer element and the third spacer element and the effective focal length f3 of the third lens satisfy: 40.9≤f3 / EP23≤89.42. By constraining f3 / EP23 within a reasonable range, the relative position of the second spacer element and the third spacer element can be constrained to ensure the edge thickness of the third lens, which is beneficial to improving the assembly stability. At the same time, controlling the deflection angle of the light in the third lens is beneficial to controlling the shape of the third lens, ensuring the processability of the third lens while balancing the aberration of the optical system, and improving the imaging quality.

[0067] In some optional embodiments, the spacer element group further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens, and the outer diameter D3s of the object side surface of the third spacer element and the curvature radius R6 of the image side surface of the third lens satisfy: -3.5≤R6 / D3s≤-1.79. By constraining R6 / D3s within a reasonable range, the supporting range of the third spacer element and the third lens can be guaranteed, which is conducive to improving the assembly stability of the third lens, while constraining the bending degree of the image side surface of the third lens, ensuring the processability of the third lens while ensuring its degree of light deflection, and reducing the generation of stray light.

[0068] In some optional embodiments, the spacer element group further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens, and the outer diameter D3m of the image side surface of the third spacer element and the curvature radius R7 of the object side surface of the fourth lens satisfy: 3.06≤R7 / D3m≤7.22. By constraining R7 / D3m within a reasonable range, the supporting range of the third spacer element and the fourth lens can be guaranteed, which is conducive to improving the assembly stability of the fourth lens, while constraining the bending degree of the object side surface of the fourth lens, ensuring the processability of the fourth lens while ensuring its degree of light deflection, and reducing the generation of stray light.

[0069] In some optional embodiments, the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens. The inner diameter d4m of the image side surface of the fourth spacer element and the curvature radius R9 of the object side surface of the fifth lens satisfy: 1.06≤R9 / d4m≤1.97. By constraining R9 / d4m within a reasonable range, the aperture of the light entering the fifth lens is constrained while the degree of curvature of the fifth lens is constrained to ensure the degree of deflection of the light in the fifth lens, so that the imaging light can smoothly pass through the fourth spacer element into the fifth lens, reducing the deflection of large-angle light. At the same time, the fourth spacer element can block part of the stray light from entering the fifth lens, effectively reducing the generation of stray light. It can also ensure the structural form of the fifth lens and improve the processability of the fifth lens.

[0070] In some optional embodiments, the spacer element group further includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the outer diameter D5s of the object side surface of the fifth spacer element, the inner 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: -8.5≤R10 / (D5s-d5s)≤-5.03. By constraining R10 / (D5s-d5s) within a reasonable range, the curvature degree of the image side surface of the fifth lens can be controlled, the structural form of the fifth lens can be ensured, and the processability of the fifth lens can be improved. At the same time, the emission angle of the light through the fifth lens is constrained, which helps to improve the edge field illumination, reduce the sensitivity of the optical system, and ensure that the imaging light passes through the fifth spacer element smoothly, reducing the risk of the fifth spacer element blocking the imaging light. At the same time, the fifth spacer element blocks the non-imaging light emitted in the non-effective diameter area of ​​the fifth lens, which is beneficial to reduce the generation of stray light. At the same time, constraining the supporting width of the fifth spacer element and the fifth lens is beneficial to improving the stability of the assembly between the fifth lens and the fifth spacer element, and improving the performance of the optical lens in high temperature and high humidity reliability experiments.

[0071] In some optional embodiments, the spacer element group further includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the outer diameter D5m of the image side surface of the fifth spacer element, the inner diameter d5m of the image side surface of the fifth spacer element, and the curvature radius R11 of the object side surface of the sixth lens satisfy: 2.32≤R11 / (D5m-d5m)≤4.62. By constraining R11 / (D5m-d5m) within a reasonable range, the curvature degree of the image side surface of the sixth lens can be controlled, the structural form of the sixth lens can be ensured, and the processability of the sixth lens can be improved. At the same time, the deflection angle of the light on the object side surface of the sixth lens is constrained, which helps to improve the edge field illumination, reduce the sensitivity of the optical system, and ensure that the imaging light passing through the fifth spacer element smoothly enters the sixth lens, reducing the risk of the fifth spacer element blocking the imaging light. At the same time, the fifth spacer element blocks non-imaging light, which is conducive to reducing the generation of stray light. Constraining the supporting width of the fifth spacer element and the sixth lens is beneficial to improving the stability of the assembly between the sixth lens and the fifth spacer element, and improving the performance of the optical lens in high temperature and high humidity reliability experiments.

[0072] 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, 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 along the optical axis from the object side to the image side; the spacer element group includes at least a first spacer element, and the first spacer element is located between the first lens and the second lens and partially contacts with the image side surface of the first lens; the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element satisfy the following conditions: 2.98≤f1 / (EP01+CT1)≤3.82; the inner diameter d1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy the following conditions: 2.3≤R2 / d1s≤6.31.

[0073] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and the effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacer element satisfy: 2.98≤f1 / (EP01+CT1)≤3.82, and the range of the optical power of the first lens is reasonably controlled, which can contribute reasonable positive third-order spherical aberration and negative fifth-order spherical aberration, balance the negative third-order spherical aberration and positive fifth-order spherical aberration generated by the rear optical element, so that the optical system has a smaller spherical aberration, and ensures good imaging quality of the on-axis field of view. By constraining f1 / (EP01+CT1) within a reasonable range, while ensuring the structural strength of the lens barrel, the edge thickness and center thickness of the first lens are constrained, which is conducive to ensuring the structural form of the first lens, ensuring the structural strength of the first lens, and improving the assembly stability of the front lens of the optical lens, but it is easy to cause stray light in the rear optical system, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains R2 / d1s within a reasonable range, which can control the angle at which light is emitted from the object side of the first lens, ensuring that the imaging light is smoothly emitted through the first spacing element. At the same time, the first spacing element can intercept stray light at the edge of the optical effective diameter of the first lens, reduce stray light from entering the rear optical system, and help improve the imaging quality of the optical lens.

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

[0075] 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, 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 along the optical axis from the object side to the image side; the spacer element group includes at least a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, 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 inner diameter d4m of the image side surface of the fourth spacer element and the curvature radius R9 of the object side surface of the fifth lens satisfy: 1.06≤R9 / d4m≤1.97; the center thickness CT4 of the fourth lens, the spacing distance EP34 between the third spacer element and the fourth spacer element, and the air spacing T34 between the fourth lens and the fifth lens on the optical axis satisfy: 0.97≤(CT4+T45) / EP34≤3.64.

[0076] The optical lens of the present application is composed of a lens barrel, seven lenses and at least two spacer elements, and when the inner diameter d4m of the image side surface of the fourth spacer element and the curvature radius R9 of the object side surface of the fifth lens satisfy the following conditions: 1.06≤R9 / d4m≤1.97, the aperture of the light entering the fifth lens is constrained and the curvature degree of the fifth lens is constrained to ensure the degree of deflection of the light in the fifth lens, so that the imaging light can smoothly pass through the fourth spacer element and enter the fifth lens, reducing the deflection of light at a large angle. At the same time, the fourth spacer element can block part of the stray light from entering the fifth lens, effectively reducing the generation of stray light, but it is easy to cause the fourth spacer element to have poor assembly stability. In order to improve the assembly stability of the optical lens, the present application constrains (CT4+T45) / EP34 within a reasonable range, which can control the range of the edge thickness and the center thickness of the fourth lens, thereby ensuring the thickness ratio of the fourth lens, ensuring the structural strength of the fourth lens, and facilitating improving the support stability of the fifth lens, improving the stability of the assembly between the fourth lens, the fourth spacer element and the fifth lens, and at the same time constraining the air gap between the fourth lens and the fifth lens, which can reduce the risk of lens scratches during the assembly process, and is conducive to ensuring the stability of the optical performance.

[0077] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0078] 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.

[0079] 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.

[0080] Optionally, the optical lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0081] 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.

[0082] 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.

[0083] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although 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.

[0084] Figure 1 A schematic diagram of the dimension marking of an optical lens of the present application is shown. Figure 1 Parameters such as d1s, d1m, d2s, D3s, D3m, d4m, d5s, d5m, D5m, D6s, D6m, EP01, EP12, and EP23 are indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical lens and the surface shape of the specific lens, these parameters will no longer be reflected in the drawings when the specific embodiments are described later.

[0085] 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.

[0086] 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.

[0087] It should be noted that any of the following embodiments 1 to 4 are applicable to all implementation methods of the present application.

[0088] Embodiment 1

[0089] like Figures 2 to 6 As shown, the optical lens of embodiment 1 is described. Figure 2 The structure diagram of the optical lens of Example 1-1 is shown. Figure 3 A schematic structural diagram of the optical lens of Example 1-2 is shown.

[0090] 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.

[0091] like Figure 2FIG. 1 is a schematic diagram of the structure of the optical lens of Example 1-1. In this embodiment, 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.

[0092] like Figure 3 FIG. 1 is a schematic diagram of the structure of the optical lens of Example 1-2. In this embodiment, 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096]

[0097] Table 2

[0098] 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:

[0099]

[0100] 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.

[0101]

[0102]

[0103] Table 3

[0104] Figure 4 The axial chromatic aberration curve of the optical lens of the first embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the optical lens. Figure 5 The astigmatism curve of the optical lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 6 The magnification chromatic aberration curve of the optical lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0105] according to Figures 4 to 6 It can be seen that the optical lens provided in the first embodiment can achieve good imaging quality.

[0106] Embodiment 2

[0107] like Figures 7 to 11 As shown, the optical lens of the second embodiment is described. Figure 7 The structure diagram of the optical lens of Example 2-1 is shown. Figure 8 A schematic structural diagram of the optical lens of Example 2-2 is shown.

[0108] like Figure 7 and Figure 8As 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.

[0109] like Figure 7 FIG. 2 is a schematic diagram of the structure of the optical lens of Example 2-1. In this embodiment, 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.

[0110] like Figure 8 , which is a schematic diagram of the structure of the optical lens of Example 2-2. In this embodiment, the optical lens further includes a third auxiliary spacer element P3b, the object side surface and the image side surface of the third auxiliary spacer element are respectively abutted against the image side surface of the third spacer element and the object side surface of the fourth lens, and the abutting manner of other spacer elements is the same as that of Example 2-1, and the relevant description in Example 2-1 may be referred to, and no further description is given here.

[0111] 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.

[0112] 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.

[0113] 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.

[0114]

[0115] Table 4

[0116] 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.

[0117] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.1106E-02 1.8316E-04 -7.5774E-04 -3.2350E-04 -2.0294E-04 -7.7863E-05 -5.9611E-05 S2 -2.2243E-02 1.9233E-03 -7.6596E-04 -2.0773E-04 -9.4604E-05 -6.7407E-05 -1.7502E-05 S3 -2.5816E-02 6.3176E-03 -1.6867E-04 1.1469E-04 -7.4878E-06 1.1885E-05 -8.1973E-06 S4 1.0422E-02 4.6697E-03 4.0082E-04 5.5736E-05 3.3143E-05 -7.8733E-06 8.0273E-06 S5 -7.9297E-02 -4.2693E-03 -2.0736E-04 1.8031E-04 3.0609E-05 5.4320E-05 3.6332E-06 S6 -1.9113E-01 -7.4282E-03 -7.7556E-04 -2.1848E-04 -2.0441E-04 2.8923E-05 2.0820E-05 S7 -3.6353E-01 4.9122E-02 -2.4830E-03 -3.4409E-03 -2.4712E-03 2.8027E-04 -2.1484E-05 S8 -6.3254E-01 1.5662E-01 -5.6453E-03 -7.4662E-03 -4.4279E-03 2.6360E-03 3.5024E-04 S9 -7.6550E-01 7.6123E-03 -2.1548E-03 8.3987E-03 -4.6704E-03 1.7563E-03 3.1333E-04 S10 -2.7503E-01 1.3553E-01 -8.2253E-02 3.5982E-02 -1.8023E-02 8.2006E-03 -1.6489E-03 S11 -2.0793E+00 5.7915E-01 -1.2672E-01 2.4500E-03 9.2065E-03 -2.4320E-03 -1.2048E-03 S12 2.8781E-01 -1.0773E-01 1.8114E-02 -1.3418E-03 1.8960E-02 -4.6933E-03 -7.2946E-04 S13 1.0474E+00 7.3565E-02 -1.0919E-01 7.8548E-02 -5.7967E-02 2.9676E-02 -1.0849E-02 S14 -6.1788E+00 1.3099E+00 -3.4805E-01 1.4183E-01 -8.8325E-02 3.2664E-02 -1.6989E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.8902E-05 -1.8626E-05 -4.0817E-06 -6.1627E-06 -9.9151E-08 -2.0051E-06 1.3569E-06 S2 -1.7564E-05 -2.0288E-06 -6.0076E-06 2.9691E-06 -1.9175E-06 2.1518E-06 -1.2308E-06 S3 7.5694E-06 -3.4364E-06 4.2664E-06 -2.5787E-06 2.3073E-06 -1.9179E-06 2.0662E-06 S4 -4.1425E-06 3.6662E-06 -3.4387E-06 1.5510E-06 -9.5982E-07 1.0848E-06 -3.4740E-07 S5 1.4701E-05 -3.5741E-06 4.0686E-06 -2.9432E-06 1.5139E-06 -1.1178E-06 8.7522E-07 S6 -4.7502E-07 -2.7166E-07 -5.4028E-06 3.3765E-06 -1.1035E-06 3.3616E-06 -4.7012E-07 S7 -5.8604E-05 -1.0068E-04 3.8834E-06 -1.2464E-05 1.6310E-06 -6.6075E-06 3.1049E-06 S8 -1.4306E-04 -2.5885E-04 7.7041E-05 1.7515E-05 1.1369E-05 -1.3901E-05 3.8890E-06 S9 1.9409E-04 -3.4943E-04 1.5576E-05 -1.1055E-04 -5.0938E-05 -5.5407E-05 -1.3711E-05 S10 -9.0677E-04 2.4975E-04 4.9462E-04 -5.3824E-04 2.1530E-04 -6.5456E-05 6.9661E-06 S11 1.0190E-03 -1.5804E-04 7.0370E-04 -5.2941E-04 2.9290E-04 -1.1471E-04 1.1039E-05 S12 -4.4332E-03 2.0487E-03 -2.1658E-04 8.0591E-05 6.0234E-04 7.8100E-05 1.7309E-04 S13 4.2715E-03 -2.1734E-03 -5.1307E-04 2.1590E-03 -2.0050E-03 9.8422E-04 -2.1690E-04 S14 1.1361E-02 -5.6118E-03 2.4605E-03 -1.1409E-03 2.8412E-04 -3.6809E-04 1.2979E-04

[0118] Table 5

[0119] Fig. 9 The axial chromatic aberration curve of the optical lens of the second embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the optical lens. Fig.10 The astigmatism curve of the optical lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.11 The magnification chromatic aberration curve of the optical lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0120] according to Figures 9 to 11 It can be seen that the optical lens provided in the second embodiment can achieve good imaging quality.

[0121] Embodiment 3

[0122] like Figures 12 to 16 As shown, the optical lens of embodiment 3 is described. Fig.12 The structure diagram of the optical lens of Example 3-1 is shown. Fig.13A schematic structural diagram of the optical lens of Example 3-2 is shown.

[0123] like Fig.12 and Fig.13 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.

[0124] like Fig.12 FIG. 3 is a schematic diagram of the structure of the optical lens of Example 3-1. In this embodiment, 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.

[0125] like Fig.13 FIG. 3 is a schematic diagram of the structure of the optical lens of Example 3-2. In this embodiment, 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129]

[0130]

[0131] Table 6

[0132] 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.

[0133] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.2543E-03 9.2628E-04 -1.2184E-04 3.9986E-05 -4.2708E-05 1.7456E-05 -1.4242E-05 S2 -2.3441E-02 1.9914E-03 -1.4105E-04 -4.3644E-05 -4.3426E-06 -1.7651E-05 -2.2458E-06 S3 -3.4925E-02 5.7861E-03 -1.5297E-04 2.5288E-05 -1.2116E-05 1.5565E-05 -4.7916E-06 S4 1.9966E-03 4.8069E-03 3.5276E-04 1.7798E-05 2.8139E-05 -6.9033E-06 6.7219E-06 S5 -6.3820E-02 -5.1397E-03 -4.6797E-04 1.2402E-05 -5.1353E-05 2.2108E-05 -1.0322E-05 S6 -1.6701E-01 -1.1030E-02 -1.3730E-03 -8.1865E-04 -5.6303E-04 -1.3497E-04 -1.2923E-05 S7 -3.6527E-01 5.1305E-02 -2.0995E-03 -3.6785E-03 -2.9340E-03 3.1229E-04 7.4654E-05 S8 -6.1762E-01 1.5828E-01 -1.1270E-02 -8.0211E-03 -3.7456E-03 3.1455E-03 3.0770E-04 S9 -8.6298E-01 3.9534E-02 4.5353E-03 1.2739E-02 -4.7930E-03 1.8582E-03 -3.3184E-04 S10 -2.5123E-01 1.3225E-01 -7.2141E-02 3.4387E-02 -1.5616E-02 6.0186E-03 -5.8085E-04 S11 -2.0708E+00 5.9759E-01 -1.3092E-01 3.6341E-03 9.8929E-03 -3.6503E-03 -7.1759E-04 S12 4.0046E-01 -6.6355E-02 5.2231E-03 1.3284E-02 1.0993E-02 -8.1219E-03 2.5806E-04 S13 1.1082E+00 8.0439E-02 -1.0598E-01 7.5735E-02 -5.8440E-02 3.0897E-02 -1.2337E-02 S14 -5.9925E+00 1.2485E+00 -2.9774E-01 1.3562E-01 -8.9536E-02 2.9436E-02 -1.7165E-02 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.1457E-05 -5.2855E-06 9.0763E-06 -3.3332E-07 4.0488E-06 -6.1983E-07 2.5906E-06 S2 -9.2771E-06 -1.6298E-06 -7.8916E-06 -1.1932E-06 -3.4670E-06 1.2267E-06 0.0000E+00 S3 8.1376E-06 -4.7267E-06 3.1272E-06 -3.9438E-06 1.2759E-06 -2.3902E-06 1.0865E-06 S4 -3.7736E-06 3.4894E-06 -2.8854E-06 1.4296E-06 -1.7378E-06 1.4396E-06 -3.6013E-07 S5 1.2788E-05 -7.4776E-06 6.3430E-06 -2.9919E-06 3.4530E-06 -1.8885E-06 9.7622E-07 S6 -1.7835E-05 -3.5925E-06 -1.0430E-05 6.1616E-06 -9.4996E-07 5.9897E-06 -9.8665E-07 S7 -2.9605E-05 -1.1960E-04 8.9549E-06 -1.7245E-06 1.3798E-05 -3.4573E-06 6.6068E-06 S8 -2.9008E-04 -2.8212E-04 1.1213E-04 4.3392E-05 7.5941E-06 -1.8383E-05 -9.9116E-07 S9 1.2480E-05 -5.8418E-04 2.7773E-06 1.7882E-06 8.0745E-05 2.3524E-05 -7.2034E-06 S10 -6.9064E-04 -5.0886E-04 8.4593E-04 -3.4345E-04 2.8240E-05 6.1956E-05 -1.1850E-05 S11 2.1326E-03 -4.1778E-04 -6.3556E-06 -5.2906E-04 3.8101E-04 1.2319E-05 -5.7773E-05 S12 -1.9032E-03 4.4230E-03 -1.2631E-03 1.0064E-05 2.0578E-04 -3.9623E-04 4.2840E-05 S13 4.1375E-03 -2.3361E-03 4.2489E-04 1.6479E-03 -2.3713E-03 1.3453E-03 -3.6961E-04 S14 1.0004E-02 -7.4387E-03 2.6884E-03 -1.6629E-04 4.3346E-04 -8.9419E-04 -1.3730E-04

[0134] Table 7

[0135] Fig.14 The axial chromatic aberration curve of the optical lens of the third embodiment is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the optical lens. Fig.15 The astigmatism curve of the optical lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The magnification chromatic aberration curve of the optical lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0136] according to Figures 14 to 16 It can be seen that the optical lens provided in the third embodiment can achieve good imaging quality.

[0137] Embodiment 4

[0138] like Figures 17 to 21 As shown, the optical lens of embodiment 4 is described. Fig.17FIG4 is a schematic diagram showing the structure of the optical lens of Example 4-1. Fig.18 A schematic structural diagram of the optical lens of Example 4-2 is shown.

[0139] like Fig.17 and Fig.18 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.

[0140] like Fig.17 FIG. 4 is a schematic diagram of the structure of the optical lens of Example 4-1. In this embodiment, 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.

[0141] like Fig.18 FIG. 4 is a schematic diagram of the structure of the optical lens of Example 4-2. In this embodiment, 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145]

[0146] Table 8

[0147] 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.

[0148]

[0149]

[0150] Table 9

[0151] Fig.19 The axial chromatic aberration curve of the optical lens of Example 4 is shown, which indicates the deviation of the focusing point of light rays of different wavelengths after passing through the optical lens. Fig. 20 The astigmatism curve of the optical lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.21 The magnification chromatic aberration curve of the optical lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0152] according to Figures 19 to 21 It can be seen that the optical lens provided in the fourth embodiment can achieve good imaging quality.

[0153] In summary, the optical lenses of Embodiments 1 to 4 respectively satisfy the relationship shown in Table 10.

[0154] Conditional / Example 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 f1 / (EP01+CT1) 3.32 3.36 3.82 3.74 3.45 3.45 2.98 2.98 R2 / d1s 3.51 3.49 3.91 2.30 2.96 2.96 6.26 6.31 R3 / d1m 2.66 2.64 2.63 1.17 2.78 2.78 2.51 2.54 R4*N2 / d2s 2.77 2.77 2.64 2.64 2.93 2.93 2.16 2.15 f2 / EP12 -26.24 -25.49 -20.82 -31.77 -28.67 -28.67 -14.59 -14.68 R6 / D3s -1.86 -1.79 -3.21 -3.50 -2.85 -2.96 -3.12 -3.32 f3 / EP23 41.00 41.00 56.91 89.42 42.89 42.89 41.23 40.90 R7 / D3m 4.15 4.01 3.13 3.06 6.95 7.22 3.33 3.54 R9 / d4m 1.46 1.46 1.32 1.32 1.06 1.08 1.97 1.97 R10 / (D5s-d5s) -7.48 -8.50 -6.48 -7.37 -7.28 -7.94 -5.81 -5.03 R11 / (D5m-d5m) 3.83 4.36 3.42 3.89 4.24 4.62 2.69 2.32 D6s / R12 -2.00 -1.98 -2.00 -1.84 -1.93 -1.93 -1.57 -1.56 D6m / R13 -2.33 -2.30 -2.34 -2.24 -2.47 -2.44 -1.81 -1.81 (CT4+T45) / EP34 1.00 1.00 0.97 3.64 1.29 1.29 1.00 1.00

[0155] Table 10

[0156] Table 11 shows some parameters of the optical lenses of Examples 1 to 4 (unit: mm).

[0157]

[0158]

[0159] Table 11

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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 direction; The spacer element group includes at least a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and is in contact with the image side surface portion of the sixth lens; The curvature radius R12 of the image side surface of the sixth lens and the outer diameter D6s of the object side surface of the sixth spacer element satisfy the following: -2.0≤D6s / R12≤-1.56; A curvature radius R13 of the object side surface of the seventh lens and an outer diameter D6m of the image side surface of the sixth spacing element satisfy the following: -2.47≤D6m / R13≤-1.

81.

2. The optical lens according to claim 1, characterized in that: The spacer element group also includes a first spacer element, which is located between the first lens and the second lens and contacts the image side surface of the first lens. The effective focal length f1 of the first lens, the center thickness CT1 of the first lens on the optical axis, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element satisfy the following conditions: 2.98≤f1 / (EP01+CT1)≤3.

82.

3. The optical lens according to claim 1, characterized in that: The spacer element group also includes a first spacer element, which is located between the first lens and the second lens and partially contacts the image side surface of the first lens. The inner diameter d1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy: 2.3≤R2 / d1s≤6.

31.

4. The optical lens according to claim 1, characterized in that: The spacer element group also includes a first spacer element, which is located between the first lens and the second lens and contacts the image side portion of the first lens. The inner diameter d1m of the image side of the first spacer element and the curvature radius R3 of the object side of the second lens satisfy: 1.17≤R3 / d1m≤2.

78.

5. The optical lens according to claim 1, characterized in that: The spacer element group also includes a first spacer element and a second spacer element. The first spacer element is located between the first lens and the second lens and contacts the image side portion of the first lens. The second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens. The spacing distance EP12 between the first spacer element and the second spacer element and the effective focal length f2 of the second lens satisfy: -31.77≤f2 / EP12≤-14.

59.

6. The optical lens according to claim 1, characterized in that: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens and partially contacts the image side surface of the second lens. The curvature radius R4 of the image side surface of the second lens, the refractive index N2 of the second lens, and the inner diameter d2s of the object side surface of the second spacer element satisfy the following: 2.15≤R4*N2 / d2s≤2.

93.

7. The optical lens according to claim 1, characterized in that: The spacer element group also includes 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 portion of the second lens. 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 spacing distance EP23 between the second spacer element and the third spacer element and the effective focal length f3 of the third lens satisfy: 40.9≤f3 / EP23≤89.

42.

8. The optical lens according to claim 1, characterized in that: The spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens. The outer diameter D3s of the object side of the third spacer element and the curvature radius R6 of the image side of the third lens satisfy the following relationship: -3.5≤R6 / D3s≤-1.

79.

9. The optical lens according to claim 1, characterized in that: The spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens. The outer diameter D3m of the image side surface of the third spacer element and the curvature radius R7 of the object side surface of the fourth lens satisfy the following relationship: 3.06≤R7 / D3m≤7.

22.

10. The optical lens according to any one of claims 1 to 9, characterized in that: The spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The inner diameter d4m of the image side of the fourth spacer element and the curvature radius R9 of the object side of the fifth lens satisfy the following relationship: 1.06≤R9 / d4m≤1.

97.

11. The optical lens according to any one of claims 1 to 9, characterized in that: The spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens. The outer diameter D5s of the object side surface of the fifth spacer element, the inner 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: -8.5≤R10 / (D5s-d5s)≤-5.

03.

12. The optical lens according to any one of claims 1 to 9, characterized in that: The spacer element group also includes a fifth spacer element, which is located between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens. The outer diameter D5m of the image side surface of the fifth spacer element, the inner diameter d5m of the image side surface of the fifth spacer element, and the curvature radius R11 of the object side surface of the sixth lens satisfy the following: 2.32≤R11 / (D5m-d5m)≤4.

62.

13. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens meets at least one of the following requirements: The first lens has positive optical power; The second lens has negative optical power; The third lens has positive optical power; The fourth lens has negative optical power; The fifth lens has positive optical power; The sixth lens has positive optical power; The seventh lens has negative refractive power.

14. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens meets at least one of the following requirements: The object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; The object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; The image side surface of the third lens is a convex surface; The object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a concave surface; The object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface; The object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface; The object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface.

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