Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, seven lenses and a plurality of spacing elements, wherein the seven lenses and the spacing elements are arranged in the lens barrel. The maximum effective radius DT41 of the object side face of the fourth lens and the maximum effective radius DT51 of the object side face of the fifth lens meet the following conditions: 1.17 lt; dT51 / DT41lt; 1.33, 1.33; the combined focal length f45 of the fourth lens and the fifth lens, the outer diameter D4s of the object side surface of the fourth spacing element and the inner diameter d4s of the object side surface of the fourth spacing element meet the following conditions:-0.04 lt; (D4s-d4s) / f45lt; 0.81, 0.81; the inner diameter d4m of the image side surface of the fourth spacing element and the maximum effective radius DT51 of the object side surface of the fifth lens meet the following conditions: 1.73 lt; d < 4 > m / DT51lt; and 1.92. The optical lens solves the problem that in the prior art, an optical lens causes serious stray light in order to correct aberration of a middle lens.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical lens. Background Art

[0002] With the development of electronic devices, more and more electronic devices have a camera function, and the requirements for the imaging quality of optical lenses are gradually increasing. Usually, the method of increasing the number of lenses is adopted to improve the imaging quality of optical lenses. However, with the increase in the number of lenses, the negative impacts are also increasing. For example, in order to correct the aberration of the middle lens, the problem of stray light follows. Usually, the aberration can be corrected by restricting the effective diameter of the middle lens, but it is easy to cause an increase in the step difference between two adjacent lenses, which is likely to introduce stray light and affect the imaging quality.

[0003] That is to say, in the prior art, there is a problem that the stray light is serious in the optical lens in order to correct the aberration of the middle lens. Summary of the Invention

[0004] The main object of the present invention is to provide an optical lens to solve the problem that the stray light is serious in the optical lens in the prior art in order to correct the aberration of the middle lens.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an optical lens, including a lens barrel, a lens group and a spacer element group disposed 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 along the optical axis direction from the object side to the image side. The first lens has a positive optical power, the seventh lens has a negative optical power, the object 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 concave, 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 concave; the spacer element group includes at least a fourth spacer element, and the fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.17 < DT51 / DT41 < 1.33; the combined focal length f45 of the fourth lens and the fifth lens, the outer diameter D4s of the object side surface of the fourth spacer element, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: -0.04 < (D4s - d4s) / f45 < 0.81; the inner diameter d4m of the image side surface of the fourth spacer element and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.73 < d4m / DT51 < 1.92.

[0006] According to another aspect of the present invention, there is provided an optical lens, including a lens barrel, a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of seven lenses, which are sequentially arranged along the optical axis direction from the object side to the image side as the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens. The first lens has a positive optical power, and the seventh lens has a negative optical power; the spacer element group at least includes a fourth spacer element, and the fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.17 < DT51 / DT41 < 1.33; the inner diameter d4s of the object side surface of the fourth spacer element, the curvature radius R8 of the image side surface of the fourth lens, and the refractive index N4 of the fourth lens satisfy: 1.95 < R8*N4 / d4s < 5.15.

[0007] According to another aspect of the present invention, there is provided an optical lens, including a lens barrel, a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of seven lenses, which are sequentially arranged along the optical axis direction from the object side to the image side as the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens. The first lens has a positive optical power, and the seventh lens has a negative optical power; the spacer element group at least includes a fourth spacer element and a fifth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens, and the fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens; the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, the central thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.36 < EP45 / (T45 + CT5) < 0.60; the curvature radius R9 of the image side surface of the fifth lens, the curvature radius R10 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: -4.09 < R10 / d5s + R11 / d5m < 1.13.

[0008] Further, the inner diameter d4m of the image side surface of the fourth spacer element and the spacing distance |SAG51| between the intersection point of the object side surface of the fifth lens and the optical axis and the object side surface of the non-effective diameter region of the fifth lens along the optical axis direction satisfy: 5.40 < d4m / |SAG51| < 14.20.

[0009] Further, the effective focal length f4 of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: -0.26 < d4s / f4 < 0.15.

[0010] Furthermore, the inner diameter d0s of the object-side end face of the lens barrel, the maximum effective radius DT71 of the object side face of the seventh lens, and the maximum effective radius DT11 of the object side face of the first lens satisfy: 2.45 < d0s / (DT71 - DT11) < 3.40.

[0011] Furthermore, the spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side face of the fifth lens. The spacing distance EP45 between the image side face of the fourth spacer element and the object side face of the fifth spacer element in the optical axis direction, the central thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.36 < EP45 / (T45 + CT5) < 0.60.

[0012] Furthermore, the spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side face of the fifth lens. The spacing distance EP45 between the image side face of the fourth spacer element and the object side face of the fifth spacer element in the optical axis direction and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 0 ≤ EP45 / f45 < 0.21.

[0013] Furthermore, the spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side face of the fifth lens. The spacing distance EP45 between the image side face of the fourth spacer element and the object side face of the fifth spacer element in the optical axis direction and the spacing distance |SAG51| between the intersection point of the object side face of the fifth lens and the optical axis and the object side face of the non-effective diameter region of the fifth lens in the optical axis direction satisfy: 0.38 < |SAG51| / EP45 < 1.24.

[0014] Furthermore, 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 is in partial contact with the image side face of the third lens. The maximum effective radius DT41 of the object side face of the fourth lens, the maximum effective radius DT42 of the image side face of the fourth lens, and the spacing distance EP34 between the image side face of the third spacer element and the object side face of the fourth spacer element in the optical axis direction satisfy: 5.28 < (DT41 + DT42) / EP34 < 14.6.

[0015] Furthermore, 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 is in partial contact with the image side face of the third lens. The outer diameter D3s of the object side face of the third spacer element and the outer diameter D4s of the object side face of the fourth spacer element satisfy: 1.08 < D4s / D3s < 1.62.

[0016] Further, 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 contacts the image-side portion of the third lens. The air gap T34 between the third lens and the fourth lens on the optical axis and the maximum thickness CP3 of the third spacer element in the optical axis direction satisfy: 4.82 < T34 / CP3 < 6.84.

[0017] Further, 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 contacts the image-side portion of the third lens. The inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R6 of the image-side surface of the third lens satisfy: -0.2 < d3s / (R5 + R6) < 0.2.

[0018] Further, 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. The spacer distance EP23 between the image-side surface of the second spacer element and the object-side surface of the third spacer element in the optical axis direction and the central thickness CT3 of the third lens satisfy: 0.56 < EP23 / CT3 < 1.3.

[0019] Further, the spacer element group further includes a second spacer element. The second spacer element is located between the second lens and the third lens and contacts the image-side portion of the second lens. The inner diameter d2s of the object-side surface of the second spacer element and the maximum effective radius DT31 of the object-side surface of the third lens satisfy: 2.00 < d2s / DT31 < 2.25.

[0020] Further, the spacer element group further includes a second spacer element and a fifth 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 fifth spacer element is located between the fifth lens and the sixth lens and contacts the image-side portion of the fifth lens. The inner diameter d5s of the object-side surface of the fifth spacer element, the inner diameter d2s of the object-side surface of the second spacer element, the effective focal length f5 of the fifth lens, and the effective focal length f2 of the second lens satisfy: -0.04 < (d5s - d2s) / (f5 - f2) < 0.10.

[0021] Applying the technical solution of the present invention, the optical lens includes a lens barrel, a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of seven lenses, which are sequentially arranged along the optical axis direction from the object side to the image side, namely the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens. The first lens has a positive optical power, and the seventh lens has a negative optical power. The object 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 concave, 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 concave; the spacer element group includes at least a fourth spacer element, and the fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the following relationships are satisfied among the maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT51 of the object side surface of the fifth lens: 1.17 < DT51 / DT41 < 1.33; the following relationships are satisfied among the combined focal length f45 of the fourth lens and the fifth lens, the outer diameter D4s of the object side surface of the fourth spacer element, and the inner diameter d4s of the object side surface of the fourth spacer element: -0.04 < (D4s - d4s) / f45 < 0.81; the following relationship is satisfied between the inner diameter d4m of the image side surface of the fourth spacer element and the maximum effective radius DT51 of the object side surface of the fifth lens: 1.73 < d4m / DT51 < 1.92.

[0022] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. When 1.17 < DT51 / DT41 < 1.33, where DT41 is the maximum effective radius of the object side of the fourth lens and DT51 is the maximum effective radius of the object side of the fifth lens, by constraining the relationship between the maximum effective radii of the object sides of the fourth lens and the fifth lens, the apertures of the fourth lens and the fifth lens can be constrained to ensure the aberration correction effect of the fourth lens and the fifth lens, which is beneficial to improving the imaging quality. However, this easily leads to an excessive step difference between the fourth lens and the fifth lens, and further affects the stray light generated by reflection, scattering or diffraction between the fourth lens and the fifth lens. These stray lights will reduce the contrast of the image and affect the imaging quality, especially in high-brightness or strong light source environments. In the present application, by constraining (D4s - d4s) / f45 within a reasonable range, the light passing range and the blocking range between the fourth lens and the fifth lens can be controlled, ensuring that the size of the fourth spacer element matches the combined focal length of the fourth lens and the fifth lens, reducing the light incident on the mechanical area of the lens, thereby reducing the generation of stray light and improving the stray light problem. If (D4s - d4s) / f45 is less than -0.04, the width of the fourth spacer element is too short, which easily causes some light to leak at the edge of the fourth spacer element and become stray light, interfering with the imaging quality. If (D4s - d4s) / f45 is greater than 0.81, the effective length of the fourth spacer element is too long, which is too large relative to the combined focal length f45 of the fourth lens and the fifth lens. When the light passes through the fourth spacer element, it is subjected to more reflections and refractions, which will also increase the generation of stray light. In addition, when the optical lens in the present application further satisfies 1.73 < d4m / DT51 < 1.92, the scattering and diffraction of light at the edge of the fourth spacer element or the edges of the fourth lens and the fifth lens can be reduced, thereby further improving the stray light problem at the fourth lens and the fifth lens. If d4m / DT51 is less than 1.73, the inner diameter of the fourth spacer element is too small, and the fourth spacer element easily blocks the imaging light, thereby affecting the illuminance of the optical lens. At the same time, it will also increase the unnecessary reflections and scatterings of light inside the optical lens, resulting in the aggravation of the stray light problem. If d4m / DT51 is greater than 1.92, the inner diameter of the fourth spacer element is too large, which will cause stray light to enter the edge of the fifth lens, and then new stray light will be generated by reflection and scattering inside the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 shows a dimension marking diagram of an optical lens according to an alternative embodiment of the present invention;

[0025] Figure 2 Shows the structural schematic diagram of the optical lens of Embodiment 1-1 of the present invention;

[0026] Figure 3 Shows the structural schematic diagram of the optical lens of Embodiment 1-2 of the present invention;

[0027] Figure 4 Shows the structural schematic diagram of the optical lens of Embodiment 1-3 of the present invention;

[0028] Figures 5 to 7 Respectively show the axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of Embodiment 1 of the present invention;

[0029] Figure 8 Shows the structural schematic diagram of the optical lens of Embodiment 2-1 of the present invention;

[0030] Figure 9 Shows the structural schematic diagram of the optical lens of Embodiment 2-2 of the present invention;

[0031] Figure 10 Shows the structural schematic diagram of the optical lens of Embodiment 2-3 of the present invention;

[0032] Figures 11 to 13 Respectively show the axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of Embodiment 2 of the present invention;

[0033] Figure 14 Shows the structural schematic diagram of the optical lens of Embodiment 3-1 of the present invention;

[0034] Figure 15 Shows the structural schematic diagram of the optical lens of Embodiment 3-2 of the present invention;

[0035] Figure 16 Shows the structural schematic diagram of the optical lens of Embodiment 3-3 of the present invention;

[0036] Figures 17 to 19 Respectively show the axial chromatic aberration, astigmatism curve and distortion curve of the optical lens of Embodiment 3 of the present invention;

[0037] Figure 20 Shows the optical path diagram of the optical lens of an alternative embodiment of the present invention;

[0038] Figure 21 Shows Figure 20 the spot diagram of the optical lens in

[0039] Figure 22 Shows the optical path diagram of the optical lens in an example;

[0040] Figure 23 shows Figure 22 the spot diagram of the optical lens in

[0041] Figure 24 shows the optical path diagram of the optical lens in another example;

[0042] Figure 25 shows Figure 24 the spot diagram of the optical lens in Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0045] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms do not limit the present invention.

[0046] It should be noted that in this specification, the expressions of the 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 teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0047] In the drawings, for the convenience of illustration, the thickness, size and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0048] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the convexity and concavity are judged by the positive and negative values of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). Taking the object side surface as an example, 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; taking the image side surface as an example, 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 this application, the left side is the object side and the right side is the image side.

[0049] In order to solve the problem of serious stray light caused by correcting the aberration of the middle lens in the prior art, the present invention provides an optical lens.

[0050] As Figures 1 to 19 shown, the optical lens includes a lens barrel, a lens group and a spacer element group disposed 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 along the optical axis direction from the object side to the image side; the spacer element group includes at least a fourth spacer element, and the fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens; the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.17 < DT51 / DT41 < 1.33; the combined focal length f45 of the fourth lens and the fifth lens, the outer diameter D4s of the object side surface of the fourth spacer element, and the inner diameter d4s of the object side surface of the fourth spacer element satisfy: -0.04 < (D4s - d4s) / f45 < 0.81; the inner diameter d4m of the image side surface of the fourth spacer element and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.73 < d4m / DT51 < 1.92.

[0051] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element. The first lens has a positive optical power. By constraining the first lens to have a positive optical power, it is beneficial for large-angle light rays to converge into the optical imaging lens, which is beneficial for improving the light flux. The seventh lens has a negative optical power, which can balance the aberration brought by the front system and appropriately diverge the light rays transmitted to the imaging surface. When the maximum effective radius DT41 of the object side of the fourth lens and the maximum effective radius DT51 of the object side of the fifth lens satisfy: 1.17 < DT51 / DT41 < 1.33, by constraining the relationship between the maximum effective radii of the object sides of the fourth lens and the fifth lens, the apertures of the fourth lens and the fifth lens can be constrained to ensure the aberration correction effect of the fourth lens and the fifth lens, which is beneficial for improving the imaging quality. However, this is likely to cause an excessive step difference between the fourth lens and the fifth lens, and further affect the stray light generated by reflection, scattering or diffraction between the fourth lens and the fifth lens. These stray lights will reduce the contrast of the image and affect the imaging quality, especially in high-brightness or strong light source environments. In the present application, by constraining (D4s - d4s) / f45 within a reasonable range, the light passing range and the blocking range between the fourth lens and the fifth lens can be controlled, ensuring that the size of the fourth spacer element matches the combined focal length of the fourth lens and the fifth lens, reducing the light rays hitting the mechanism area of the lens, thereby reducing the generation of stray light and improving the stray light problem. If (D4s - d4s) / f45 is less than -0.04, the width of the fourth spacer element is too short, which is likely to cause some light rays to leak at the edge of the fourth spacer element and become stray light, interfering with the imaging quality. If (D4s - d4s) / f45 is greater than 0.81, the effective length of the fourth spacer element is too long, which is too large relative to the combined focal length f45 of the fourth lens and the fifth lens. When the light passes through the fourth spacer element, it will be subjected to more reflections and refractions, which will also increase the generation of stray light. In addition, when the optical lens in the present application further satisfies 1.73 < d4m / DT51 < 1.92, the scattering and diffraction of light at the edge of the fourth spacer element or the edges of the fourth lens and the fifth lens can also be reduced, thereby further improving the stray light problem at the fourth lens and the fifth lens. If d4m / DT51 is less than 1.73, the inner diameter of the fourth spacer element is too small, and the fourth spacer element is likely to block the imaging light rays, thereby affecting the illuminance of the optical lens. At the same time, it will also increase the unnecessary reflections and scatterings of light inside the optical lens, resulting in an exacerbation of the stray light problem. If d4m / DT51 is greater than 1.92, the inner diameter of the fourth spacer element is too large, which will cause stray light to enter the edge of the fifth lens, and then reflect and scatter inside the optical lens to generate new stray light.

[0052] In addition, referring to Table 1 below and Figures 20 to 25 as shown, Figure 20The optical path diagram of an optical imaging lens is shown when DT51 / DT41 = 1.19, (D4s - d4s) / f45 = -0.02, d4m / DT51 = 1.88 and the light ray is 21.5°. Figure 21 shows Figure 20 the spot diagram of the optical imaging lens in Figure 21 and Figure 20 It can be seen that there is no obvious stray light around the central spot, the stray light energy is weakened, the stray light is improved, and the performance is better. Figure 22 The optical path diagram of an optical imaging lens is shown when DT51 / DT41 = 1.19, (D4s - d4s) / f45 = -0.25, d4m / DT51 = 1.47 and the light ray is 21.5°. Figure 23 shows Figure 22 the spot diagram of the optical imaging lens in Figure 23 It can be seen from Figure 22 that there are dot-like stray lights around the central spot, the stray light energy is strong, the stray light has a great influence on the imaging quality, the performance is poor, and at the same time, combined with Figure 24 It can be known that the stray light is mainly formed by the reflection of the optical structure areas of the fourth lens and the fifth lens. Figure 25 shows Figure 24 the spot diagram of the optical imaging lens in Figure 25 It can be seen from Figure 24 that there are multiple dot-like stray lights around the central spot, the stray light energy is strong, the stray light has a great influence on the imaging quality, the performance is poor, and at the same time, combined with

[0053] Conditional Satisfy the condition range (this application) Less than the condition range (Example 1) Greater than the condition range (Example 2) DT51 / DT41 1.19 1.19 1.19 (D4s - d4s) / f45 -0.02 -0.25 1.19 d4m / DT51 1.88 1.47 2.78 Optical path diagram and spot diagram Figure 20 and Figure 21 Figure 22 and Figure 23 Figure 24 and Figure 25

[0054] Table 1

[0055] In the above Figure 20 、 Figure 22 and Figure 24 the incident angle of the light ray is approximately one quarter of the field of view angle.

[0056] It should be noted that in this application, (D4s - d4s) / f45 and d4m / DT51 are restricted within a reasonable range to constrain the relationship between the fourth lens, the fourth spacer element, and the fifth lens, so as to control the light transmission path from the fourth lens to the fifth lens, and solve the problem of stray light caused when DT51 / DT41 is in the range of 1.17 to 1.33. When (D4s - d4s) / f45 and d4m / DT51 meet the above range, the purpose of improving stray light can be achieved, and it does not depend on the optical power of other lenses and the surface shape of the lenses. The optical power and surface shape of other lenses are further optimizations of the optical imaging lens on this basis. The optical power of other lenses can be positive or negative according to the design requirements of the actual optical system, and the surface shape of other lenses can also be convex or concave according to the design requirements of the optical system. When the optical system satisfies: 1.17 < DT51 / DT41 < 1.33; -0.04 < (D4s - d4s) / f45 < 0.81; 1.73 < d4m / DT51 < 1.92, the optical imaging lens can reduce the influence of stray light while meeting the aberration requirements.

[0057] For example, in some alternative embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the object side surface of the second lens is convex, and the image side surface of the second lens is concave; the object side surface of the third lens is convex; 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 concave, 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 concave; the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. The optical lens can perform lens stray light simulation through software and / or tools such as LIGHTOOS, ASAP, etc. The optical lens in this application uses ASAP for simulation. During the simulation using software and / or tools such as the above, the surface shape of each lens can be simulated according to the built-in surface shape of the software and / or tool used and adjusted appropriately.

[0058] In some alternative embodiments, the following relationship is satisfied between the inner diameter d4m of the image side surface of the fourth spacer element and the distance |SAG51| along the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the object side surface of the non-effective diameter region of the fifth lens: 5.40 < d4m / |SAG51| < 14.20. By restricting d4m / |SAG51| within a reasonable range, the aberration correction of the optical lens can be optimized while reducing aberration, improving the imaging clarity of the optical lens. At the same time, the relative sizes of the fourth spacer element and the fifth lens are constrained, which helps to optimize the overall size of the optical lens. While maintaining the imaging quality, the size of the optical lens is reduced, so as to increase the application range of the optical lens. Limiting the inner diameter of the fourth spacer element can ensure the shielding range of the fifth lens and reduce the entry of stray light into the rear optical system.

[0059] In some alternative embodiments, the following relationship is satisfied between the effective focal length f4 of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer element: -0.26 < d4s / f4 < 0.15. By constraining d4s / f4 within a reasonable range, the deflection angle of light in the fourth lens can be controlled, facilitating the imaging light to smoothly pass through the fourth spacer element and enter the subsequent optical system. Constraining the relationship between the inner diameter of the object side surface of the fourth spacer element and the effective focal length of the fourth lens can reduce imaging defects such as aberration and distortion, improve the imaging clarity and accuracy of the system, and at the same time enhance the reliability of the optical lens under conditions such as temperature change and vibration.

[0060] In some alternative embodiments, the following relationship is satisfied among the inner diameter d0s of the object side end surface of the lens barrel, the maximum effective radius DT71 of the object side surface of the seventh lens, and the maximum effective radius DT11 of the object side surface of the first lens: 2.45 < d0s / (DT71 - DT11) < 3.40. By constraining d0s / (DT71 - DT11) within a reasonable range and restricting the relationship between the aperture of the object side end of the lens barrel and the maximum effective radius of the lens within the lens group, the relative dimensions of the lens within the lens group and the aperture of the object side end surface of the lens barrel can be ensured, reducing the movement or deformation of the lens within the lens barrel, which is beneficial to improving the assembly stability of the optical lens and ensuring the long-term performance of the optical system.

[0061] In some alternative embodiments, the spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens. The following relationship is satisfied among the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, the central thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis: 0.36 < EP45 / (T45 + CT5) < 0.60. By constraining EP45 / (T45 + CT5) within a reasonable range, the manufacturing and assembly accuracy can be improved. Even if there are certain errors, the optical system can still maintain good imaging performance. At the same time, the edge thickness and central thickness of the fifth lens can be constrained within a reasonable range to ensure the structural strength of the fifth lens and improve the assembly stability. At the same time, restricting the air spacing between the fourth lens and the fifth lens helps to optimize the light transmission efficiency between the lenses, reduce light loss and scattering, and improve the overall performance of the optical system.

[0062] In some alternative embodiments, the spacer element group further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and is in contact with a part of the image side surface of the fifth lens, and the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element in the optical axis direction, and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 0 ≤ EP45 / f45 < 0.21. By constraining EP45 / f45 within a reasonable range, it can ensure that the spacing between the fourth spacer element and the fifth spacer element is within a reasonable range, avoid waste of space caused by too large a spacing between the fourth spacer element and the fifth spacer element, and also avoid the influence of manufacturing tolerances caused by too small a spacing between the fourth spacer element and the fifth spacer element resulting in an overly compact structure of the optical system. At the same time, the combined focal length of the fourth lens and the fifth lens affects the converging or diverging ability of the combination of these two lenses to light. Constraining EP45 / f45 can indirectly control the range of the combined focal length f45, thereby optimizing the focal length adjustment ability of the optical system.

[0063] In some alternative embodiments, the spacer element group further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and is in contact with a part of the image side surface of the fifth lens, and the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element in the optical axis direction, and the spacing distance |SAG51| between the intersection of the object side surface of the fifth lens and the optical axis and the object side surface of the non-effective diameter region of the fifth lens in the optical axis direction satisfy: 0.38 < |SAG51| / EP45 < 1.24. By precisely controlling the ratio of |SAG51| to EP45, the aberration correction of the optical system can be optimized, especially aberrations such as field curvature and distortion, thereby improving the imaging quality. At the same time, a reasonable ratio relationship between ∣SAG51∣ and EP45 helps to ensure the compactness of the optical system. If ∣SAG51∣ is too large, it may lead to an increase in the overall size of the optical system, while if EP45 is too large, it may waste space and is not conducive to the compact design of the system.

[0064] In some alternative 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 is in contact with a part of the image side surface of the third lens, and the maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT42 of the image side surface of the fourth lens, and the spacing distance EP34 between the image side surface of the third spacer element and the object side surface of the fourth spacer element in the optical axis direction satisfy: 5.28 < (DT41 + DT42) / EP34 < 14.6. By constraining (DT41 + DT42) / EP34 within a reasonable range, the size and shape of the fourth lens can be constrained, and at the same time, the distance between the third spacer element and the fourth spacer element can be constrained, which is beneficial to constraining the edge thickness of the fourth lens, and thus is beneficial to reducing the size of the entire optical system while ensuring the imaging quality.

[0065] In some alternative embodiments, the spacer element group further 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 following relationship is satisfied between the outer diameter D3s of the object-side surface of the third spacer element and the outer diameter D4s of the object-side surface of the fourth spacer element: 1.08 < D4s / D3s < 1.62. By constraining D4s / D3s within a reasonable range, unnecessary spacer elements can be reduced or their sizes adjusted while ensuring the performance of the optical system, thereby reducing material costs and processing costs. At the same time, a reasonable proportional relationship also helps to improve the stability and durability of the system, thus reducing maintenance costs. At the same time, constraining the outer diameters of the object-side surfaces of the third spacer element and the fourth spacer element is beneficial to controlling the inner diameter size of the lens barrel, which is conducive to the miniaturization of the optical lens while ensuring the structural strength of the lens barrel.

[0066] In some alternative embodiments, the spacer element group further 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 following relationship is satisfied between the air gap T34 on the optical axis between the third lens and the fourth lens and the maximum thickness CP3 of the third spacer element along the optical axis direction: 4.82 < T34 / CP3 < 6.84. By constraining T34 / CP3 within a reasonable range, aberrations can be reduced, and the resolution and contrast can be improved, etc. Constraining the air gap on the optical axis between the third lens and the fourth lens and the maximum thickness of the third spacer element along the optical axis direction within a reasonable range helps to reduce the scattering and absorption of light at the third lens, the fourth lens, and the third spacer element, thereby improving the light transmittance of the optical lens and contributing to improving the relative illumination.

[0067] In some alternative embodiments, the spacer element group further 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 following relationship is satisfied between the inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R6 of the image-side surface of the third lens: -0.2 < d3s / (R5 + R6) < 0.2. By constraining d3s / (R5 + R6) within a reasonable range, it helps to reduce aberrations in the optical system, especially spherical aberration and coma, etc. At the same time, it can enhance the mechanical stability of the optical system and reduce displacements caused by vibration or temperature changes. In addition, constraining the relationship between the inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R5 of the object-side surface of the third lens, and the curvature radius R6 of the image-side surface of the third lens is beneficial to controlling the degree of light deflection in the third lens, so that the imaging light can pass through the third spacer element smoothly. At the same time, the third spacer element blocks the non-imaging light emitted from the third lens, which is beneficial to reducing the stray light entering the rear system, thereby improving the imaging quality.

[0068] In some alternative 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 a part of the image side surface of the second lens. The third spacer element is located between the third lens and the fourth lens and contacts a part of the image side surface of the third lens. The spacing distance EP23 along the optical axis between the image side surface of the second spacer element and the object side surface of the third spacer element, and the central thickness CT3 of the third lens satisfy: 0.56 < EP23 / CT3 < 1.3. By constraining EP23 / CT3 within a reasonable range, the spatial layout of the optical system can be optimized, ensuring a reasonable positional relationship among the second spacer element, the third spacer element, and the third lens, thereby avoiding unnecessary loss and interference of light in the optical system. Meanwhile, it helps to reduce aberrations in the optical system, especially field curvature and distortion, etc. In addition, the relationship between the edge thickness and the central thickness of the third lens can also be constrained to ensure the structural strength of the third lens, improve the assembly stability of the optical lens, and at the same time reduce the appearance of welding marks on the third lens and the risk of stray light generated at the welding mark position.

[0069] In some alternative embodiments, the spacer element group further includes a second spacer element. The second spacer element is located between the second lens and the third lens and contacts a part of the image side surface of the second lens. The inner diameter d2s of the object side surface of the second spacer element and the maximum effective radius DT31 of the object side surface of the third lens satisfy: 2.00 < d2s / DT31 < 2.25. By constraining d2s / DT31 within a reasonable range, it ensures that the light passing through the second spacer element can smoothly enter the third lens, and at the same time avoids the risk of introducing stray light due to the over-large aperture of the object side surface of the third lens, ensuring that the light can propagate along the expected path when passing through the optical system, reducing unnecessary reflections and scattering, thereby reducing the influence of stray light and ghost images.

[0070] In some alternative embodiments, the spacer element group further includes a second spacer element and a fifth spacer element. The second spacer element is located between the second lens and the third lens and contacts a part of the image side surface of the second lens. The fifth spacer element is located between the fifth lens and the sixth lens and contacts a part of the image side surface of the fifth lens. The inner diameter d5s of the object side surface of the fifth spacer element, the inner diameter d2s of the object side surface of the second spacer element, the effective focal length f5 of the fifth lens, and the effective focal length f2 of the second lens satisfy: -0.04 < (d5s - d2s) / (f5 - f2) < 0.10. By constraining (d5s - d2s) / (f5 - f2) within a reasonable range, the size and focal length relationship of the above-mentioned optical elements are precisely controlled, effectively reducing the adjustment difficulty during the assembly process and the adjustment workload, thereby improving the assembly efficiency and accuracy. At the same time, the deflection degree of light in the second lens and the fifth lens is controlled to ensure that the light is transmitted along the preset path and the imaging quality of the optical lens is guaranteed.

[0071] In another alternative embodiment of the present application, the optical lens includes a lens barrel, a lens group, and a spacer element group disposed within the lens barrel. The lens group consists of seven lenses, which are, in order along the optical axis direction from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The spacer element group includes at least a fourth spacer element, which is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens. The following relationships are satisfied between the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT51 of the object side surface of the fifth lens: 1.17 < DT51 / DT41 < 1.33. The following relationship is satisfied between the inner diameter d4s of the object side surface of the fourth spacer element, the curvature radius R8 of the image side surface of the fourth lens, and the refractive index N4 of the fourth lens: 1.95 < R8*N4 / d4s < 5.15.

[0072] The optical lens of the present application is composed of a lens barrel, seven lenses, and at least one spacer element. When 1.17 < DT51 / DT41 < 1.33 is satisfied between the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT51 of the object side surface of the fifth lens, by constraining the relationship between the maximum effective radii of the object side surfaces of the fourth lens and the fifth lens, the apertures of the fourth lens and the fifth lens can be constrained to ensure the aberration correction effect of the fourth lens and the fifth lens, which is beneficial to improving the imaging quality. However, this easily leads to an excessive step difference between the fourth lens and the fifth lens, thereby affecting the stray light generated by reflection, scattering, or diffraction between the fourth lens and the fifth lens. These stray lights will reduce the contrast of the image and affect the imaging quality, especially in a high-brightness or strong light source environment. By constraining R8*N4 / d4s within a reasonable range, the present application can control the optical path of light in the fourth lens, and further control the angular range of the light exiting the fourth lens, so that the angular range of the light exiting the fourth lens is correlated with the inner diameter of the fourth spacer element, ensuring that the imaging light passes through the fourth spacer element smoothly. At the same time, the fourth spacer element blocks the non-imaging light, reducing the stray light generated in the structural region between the fourth lens and the fifth lens, which is beneficial to improving the imaging quality of the optical lens.

[0073] Of course, other parametric formulas in the above embodiments may also be included in this embodiment, which will not be elaborated here one by one.

[0074] In another alternative embodiment of the present application, the optical lens includes a lens barrel, a lens group, and a spacer element group disposed within the lens barrel. The lens group consists of seven lenses, which are, in order from the object side to the image side along the optical axis direction, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The spacer element group includes at least a fourth spacer element and a fifth spacer element. The fourth spacer element is located between the fourth lens and the fifth lens and is in partial contact with the image side surface of the fourth lens. The fifth spacer element is located between the fifth lens and the sixth lens and is in partial contact with the image side surface of the fifth lens. The spacing distance EP45 along the optical axis direction between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element, the central thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.36 < EP45 / (T45 + CT5) < 0.60. The radius of curvature R9 of the image side surface of the fifth lens, the radius of curvature R10 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: -4.09 < R10 / d5s + R11 / d5m < 1.13.

[0075] The optical lens of the present application is composed of a lens barrel, seven lenses, and at least two spacer elements. When the spacing distance EP45 along the optical axis direction between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element, the central thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.36 < EP45 / (T45 + CT5) < 0.60, the spacing distance EP45 along the optical axis direction between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element is relatively small with respect to (T45 + CT5), resulting in a relatively large distance between the structural area of the image side surface of the fifth lens and the center of the image side surface of the fifth lens on the optical axis. This easily causes the optical effective area of the image side surface of the fifth lens to be closer to the image side surface with respect to the structural area of the object side surface of the sixth lens. After the light rays exit from the image side surface of the fifth lens, they are easily deflected into the optical structural area of the sixth lens, and the light rays are reflected and scattered in the optical structural area of the sixth lens, thereby forming stray light. By constraining R10 / d5s + R11 / d5m within a reasonable range, the present application can control the deflection angle of the light rays on the image side surface of the fifth lens and the object side surface of the sixth lens, and at the same time limit the inner diameter size of the fifth spacer element to absorb the light rays deflected into the optical structural area of the sixth lens and reduce the stray light formed in the optical structural area of the sixth lens.

[0076] Of course, other parametric formulas in the above embodiments may also be included in this embodiment, which will not be elaborated here one by one.

[0077] Optionally, the above optical lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0078] The optical lens in the present application can adopt multiple lenses, such as the seven lenses mentioned above. In the present application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0079] 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 the 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 can also include other numbers of lenses.

[0080] Figure 1 A schematic diagram of the dimension marking of an optical lens of the present application is shown. Figure 1 Parameters such as d2s, d3s, D3s, d4s, d4m, D4s, d0s, d5s, d0s, CP3, EP23, EP34, EP45, |SAG51|, etc. are marked to clearly and intuitively understand the meaning of the parameters. For the convenience of describing the surface shape of the optical lens and specific lenses, these parameters will no longer be shown in the drawings when specific embodiments are described later.

[0081] The following further describes, with reference to the drawings, examples of the specific surface shape and parameters of the optical lens applicable to the above embodiments.

[0082] It should be noted that in the following Example 1, there are three examples of Embodiment 1-1, Embodiment 1-2, and Embodiment 1-3. In Example 2, there are three examples of Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3. In Example 3, there are three examples of Embodiment 3-1, Embodiment 3-2, and Embodiment 2-3. The curvature radii, center thicknesses, etc. of the first lens to the seventh lens of the optical lens under the three examples in the same embodiment, as well as the spacing distances between the lenses and the high-order term coefficients, are the same, but the thicknesses, inner diameters, and outer diameters of the lens barrel, the first spacer element, the second spacer element, and the third spacer element, and the shapes of some lenses are different. Or rather, the main structures for imaging are the same, while the auxiliary structures for imaging are different.

[0083] It should be noted that any of the following Examples 1 to 3 is applicable to the present application.

[0084] Example 1

[0085] As shown Figures 2 to 7 in the figure, the optical lens of Embodiment 1 is described. Figure 2 The schematic structural diagram of the optical lens of Embodiment 1-1 is shown, Figure 3 the schematic structural diagram of the optical lens of Embodiment 1-2 is shown, Figure 4 the schematic structural diagram of the optical lens of Embodiment 1-3 is shown.

[0086] As shown Figures 2 to 4 in the figure, the optical lens includes a lens barrel, seven lenses and a plurality of spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a seventh lens E7, and a seventh spacer element P7, which are arranged in sequence from the object side to the image side.

[0087] As shown Figure 2 in the figure, it is the schematic structural diagram of the optical lens of Embodiment 1-1. In this example, the object side surface S1 of the first lens is in partial contact with the lens barrel. The object side surface and the image side surface of the first spacer element are in partial contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens respectively. The object side surface and the image side surface of the second spacer element are in partial contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens respectively. The object side surface and the image side surface of the third spacer element are in partial contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens respectively. The object side surface and the image side surface of the fourth spacer element are in partial contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively. The object side surface and the image side surface of the fifth spacer element are in partial contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively. The object side surface and the image side surface of the sixth spacer element are in partial contact with the image side surface S12 of the sixth lens and the object side surface S13 of the seventh lens respectively. The object side surface of the seventh spacer element is in partial contact with the image side surface S14 of the seventh lens.

[0088] As shown Figure 3 in the figure, it is the schematic structural diagram of the optical lens of Embodiment 1-2. The optical lens further includes a first main auxiliary spacer element P1b, a first sub-auxiliary spacer element P1c, and a sixth main auxiliary spacer element P6b. The first main auxiliary spacer element P1b and the first sub-auxiliary spacer element P1c are located between the first spacer element P1b and the second lens E2. The first sub-auxiliary spacer element P1c is in partial contact with the object side surface of the second lens. The sixth main auxiliary spacer element P6b is located between the sixth auxiliary spacer element P6 and the seventh lens E7. The bearing and abutting manners of other spacer elements are similar to those in Embodiment 1-1, and reference can be made to the relevant descriptions in Embodiment 1-1, which will not be elaborated here.

[0089] As Figure 4 shown, it is a schematic structural diagram of the optical lens of Embodiments 1-3. The optical lens further includes a first main auxiliary spacer element P1b, a first secondary auxiliary spacer element P1c, a sixth main auxiliary spacer element P6b, and a sixth secondary auxiliary spacer element P6c. The first main auxiliary spacer element P1b and the first secondary auxiliary spacer element P1c are located between the first spacer element P1b and the second lens E2. The first secondary auxiliary spacer element P1c is in partial contact with the object side surface of the second lens. The sixth main auxiliary spacer element P6b and the sixth secondary auxiliary spacer element P6c are located between the sixth auxiliary spacer element P6 and the seventh lens E7. The sixth secondary auxiliary spacer element P6c is in partial contact with the object side surface of the seventh lens. The abutting and contacting manners of other spacer elements are similar to those in Embodiment 1-1, and reference can be made to the relevant descriptions in Embodiment 1-1, which will not be elaborated here.

[0090] In summary, the structural parameters of the optical lens of Embodiment 1 under Embodiments 1-1, 1-2, and 1-3 are shown in Table 9.

[0091] In Embodiment 1, the first lens has a positive optical 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 has a positive optical 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 has a negative optical power. The object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is concave. The fourth lens has a positive optical 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 has a negative optical power. The object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens has a positive optical power. The object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. The seventh lens has a negative optical power. The object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. In Table 2 below, OBJ is the object surface, STO is the aperture stop, the aperture stop is located on the first lens, S15 and S16 are the object side surface and the image side surface of the filter or the protective glass respectively, and S17 is the imaging surface.

[0092] Table 2 shows the basic structural parameter table of the optical lens of Embodiment 1, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0093]

[0094]

[0095] Table 2

[0096] In Embodiment 1, the object side and the image side of the first lens E1 to the seventh lens E7 are both aspherical surfaces. In Embodiment 1, the object side and the image side of the first lens E1 to the seventh lens E7 are both aspherical surfaces.

[0097] The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0098]

[0099] Where x is the sagitta, the distance from the vertex of the aspherical surface to the aspherical surface along the optical axis at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 for each aspherical mirror surface S1 - S14 in Embodiment 1.

[0100] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.4070E-04 2.0635E-03 -1.5607E-03 6.9748E-04 -2.0161E-04 3.7098E-05 -4.2503E-06 2.7533E-07 -7.6724E-09 S2 9.4494E-03 -7.7669E-03 3.5432E-03 -1.2859E-03 3.3108E-04 -5.6376E-05 5.9900E-06 -3.5934E-07 9.2661E-09 S3 1.5237E-02 -1.1100E-02 4.2166E-03 -1.0823E-03 1.8531E-04 -8.9003E-06 -2.9654E-06 5.5619E-07 -2.9834E-08 S4 9.1548E-04 -2.4641E-03 1.7814E-03 -1.0922E-03 4.6078E-04 -1.0545E-04 1.2185E-05 -5.1368E-07 -6.2326E-09 S5 5.2699E-03 -4.6850E-03 3.3287E-03 -2.4488E-03 1.0752E-03 -2.9025E-04 4.7000E-05 -4.1250E-06 1.5026E-07 S6 -6.3120E-03 -8.6990E-05 2.3264E-03 -2.1027E-03 8.6928E-04 -2.2399E-04 3.5806E-05 -3.1439E-06 1.1357E-07 S7 6.9832E-05 -1.1149E-02 7.4656E-03 -3.7487E-03 1.3770E-03 -3.5607E-04 5.8663E-05 -5.3731E-06 2.0534E-07 S8 1.1241E-02 -1.3219E-02 6.0653E-03 -2.1098E-03 5.4312E-04 -1.0118E-04 1.2850E-05 -9.8239E-07 3.3540E-08 S9 1.3251E-02 -1.3344E-03 -1.9877E-03 1.2989E-03 -4.2230E-04 7.8706E-05 -8.4271E-06 4.7893E-07 -1.1124E-08 S10 -3.8161E-02 1.3799E-02 -4.8774E-03 1.4149E-03 -2.8841E-04 3.7283E-05 -2.8398E-06 1.1517E-07 -1.9079E-09 S11 7.2205E-03 -2.6350E-03 -7.6442E-04 3.8370E-04 -7.3011E-05 6.8896E-06 -3.0998E-07 4.5884E-09 4.1229E-11 S12 3.2530E-02 -1.2397E-02 1.9822E-03 -1.6228E-04 6.1318E-07 1.0667E-06 -8.7748E-08 2.9367E-09 -3.6716E-11 S13 -4.4929E-02 4.5008E-03 -1.4765E-04 -2.9946E-06 3.9503E-07 -1.3256E-08 2.1719E-10 -1.7618E-12 5.5884E-15 S14 -1.8380E-02 1.4712E-03 -4.7890E-05 9.0421E-07 -9.8897E-08 6.3763E-09 -1.6953E-10 2.0199E-12 -9.0139E-15

[0101] Table 3

[0102] Figure 5 Shows the axial chromatic aberration curve of the optical lens of Embodiment 1, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical lens. Figure 6 Shows the astigmatism curve of the optical lens of Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 7 Shows the distortion curve of the optical lens of Embodiment 1, which represents the distortion magnitude values corresponding to different field angles.

[0103] According to Figures 5 to 7 It can be seen that the optical lens given in Embodiment 1 can achieve good imaging quality.

[0104] Embodiment 2

[0105] As Figures 8 to 13 shown, the optical lens of Embodiment 2 is described. Figure 8 Shows the structural schematic diagram of the optical lens of Embodiment 2-1, Figure 9 Shows the structural schematic diagram of the optical lens of Embodiment 2-2, Figure 10 Shows the structural schematic diagram of the optical lens of Embodiment 2-3.

[0106] As Figures 8 to 10As shown in the figure, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fourth main auxiliary spacer element P4b, a fifth lens E5, a fifth spacer element P5, a fifth main auxiliary spacer element P5b, a sixth lens E6, a sixth spacer element P6, a sixth main auxiliary spacer element P6b, a seventh lens E7, and a seventh spacer element P7, which are arranged in sequence from the object side to the image side.

[0107] As Figure 8 shown, it is a schematic structural diagram of the optical lens of Embodiment 2-1. In this example, the object side surface S1 of the first lens is in partial contact with the lens barrel portion. The object side surface and the image side surface of the first spacer element are in partial contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and the image side surface of the second spacer element are in partial contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and the image side surface of the third spacer element are in partial contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively. The object side surface and the image side surface of the fourth spacer element are in partial contact with the image side surface S8 of the fourth lens and the object side surface of the fourth main auxiliary spacer element, respectively, and the image side surface of the fourth main auxiliary spacer element is in partial contact with the object side surface S9 of the fifth lens. The object side surface and the image side surface of the fifth spacer element are in partial contact with the image side surface S10 of the fifth lens and the object side surface of the fifth main auxiliary spacer element, respectively. The image side surface of the fifth main auxiliary spacer element is in partial contact with the object side surface S11 of the sixth lens. The object side surface and the image side surface of the sixth spacer element are in partial contact with the image side surface S12 of the sixth lens and the object side surface of the sixth main auxiliary spacer element, respectively. The image side surface of the sixth main auxiliary spacer element is in partial contact with the object side surface S13 of the seventh lens. The object side surface of the seventh spacer element is in partial contact with the image side surface S14 of the seventh lens.

[0108] As Figure 9 shown, it is a schematic structural diagram of the optical lens of Embodiment 2-2. The optical lens further includes a fourth auxiliary spacer element P4c and a fifth auxiliary spacer element P5c. The fourth auxiliary spacer element P4c is located between the fourth main auxiliary spacer element P4b and the fifth lens E5, and the fifth auxiliary spacer element P5c is located between the fifth main auxiliary spacer element P5b and the sixth lens E6. The abutting and contacting manners of the other spacer elements are similar to those in Embodiment 2-1, and reference can be made to the relevant descriptions in Embodiment 2-1, which will not be elaborated here.

[0109] As Figure 10As shown, it is a schematic structural diagram of the optical lens of Embodiment 2-3. The optical lens further includes a fourth auxiliary spacer element P4c, a fifth auxiliary spacer element P5c, and a sixth auxiliary spacer element P6c. The fourth auxiliary spacer element P4c is located between the fourth main auxiliary spacer element P4b and the fifth lens E5. The fifth auxiliary spacer element P5c is located between the fifth main auxiliary spacer element P5b and the sixth lens E6. The sixth auxiliary spacer element P6c is located between the sixth main auxiliary spacer element P6b and the seventh lens E7. The abutting and contacting manners of other spacer elements are similar to those in Embodiment 2-1, and reference can be made to the relevant descriptions in Embodiment 2-1, which will not be elaborated here.

[0110] In summary, the structural parameters of the optical lens of Embodiment 2 under Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3 are shown in Table 9.

[0111] In Embodiment 2, the first lens has a positive optical power. The object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface. The second lens has a negative optical power. The object side S3 of the second lens is a convex surface, and the image side S4 of the second lens is a concave surface. The third lens has a positive optical power. The object side S5 of the third lens is a convex surface, and the image side S6 of the third lens is a convex surface. The fourth lens has a negative optical power. The object side S7 of the fourth lens is a convex surface, and the image side S8 of the fourth lens is a concave surface. The fifth lens has a positive optical power. The object side S9 of the fifth lens is a concave surface, and the image side S10 of the fifth lens is a convex surface. The sixth lens has a negative optical power. The object side S11 of the sixth lens is a convex surface, and the image side S12 of the sixth lens is a concave surface. The seventh lens has a negative optical power. The object side S13 of the seventh lens is a convex surface, and the image side S14 of the seventh lens is a concave surface. In Table 4 below, OBJ is the object surface, STO is the aperture stop, the aperture stop is located on the first lens, S15 and S16 are respectively the object side and the image side of the filter or the protective glass, and S17 is the imaging surface.

[0112] Table 4 shows the basic structural parameter table of the optical lens of Embodiment 2, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0113]

[0114] Table 4

[0115] Table 5 shows the high-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above. In this embodiment, the object sides and the image sides of the first lens to the seventh lens are all aspherical surfaces.

[0116]

[0117]

[0118] Table 5

[0119] Figure 11 shows the axial chromatic aberration curve of the optical lens of Embodiment 2, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical lens. Figure 12 shows the astigmatism curve of the optical lens of Embodiment 2, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 13 shows the distortion curve of the optical lens of Embodiment 2, which represents the distortion magnitude values corresponding to different field angles.

[0120] According to Figures 11 to 13 it can be seen that the optical lens given in Embodiment 2 can achieve good imaging quality.

[0121] Embodiment 3

[0122] As Figures 14 to 19 shown, the optical lens of Embodiment 3 is described. Figure 14 shows the structural schematic diagram of the optical lens of Embodiment 3-1, Figure 15 shows the structural schematic diagram of the optical lens of Embodiment 3-2, Figure 16 shows the structural schematic diagram of the optical lens of Embodiment 3-3.

[0123] As Figures 14 to 16 shown, the optical lens includes a lens barrel, seven lenses and a plurality of spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, a sixth spacer element P6, a sixth main auxiliary spacer element P6b, a seventh lens E7, and a seventh spacer element P7 arranged in sequence from the object side to the image side.

[0124] As Figure 14As shown, it is a schematic structural diagram of the optical lens of Embodiment 3-1. In this example, the object side S1 of the first lens is in contact with the lens barrel part. The object side and the image side of the first spacer element are respectively in partial contact with the image side S2 of the first lens and the object side S3 of the second lens. The object side and the image side of the second spacer element are respectively in partial contact with the image side S4 of the second lens and the object side S5 of the third lens. The object side and the image side of the third spacer element are respectively in partial contact with the image side S6 of the third lens and the object side S7 of the fourth lens. The object side and the image side of the fourth spacer element are respectively in partial contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens. The object side and the image side of the fifth spacer element are respectively in partial contact with the image side S10 of the fifth lens and the object side S11 of the sixth lens. The object side and the image side of the sixth spacer element are respectively in partial contact with the image side S12 of the sixth lens and the object side of the sixth main auxiliary spacer element. The image side of the sixth main auxiliary spacer element is in partial contact with the object side S13 of the seventh lens. The object side of the seventh spacer element is in contact with the image side S14 of the seventh lens.

[0125] As Figure 15 shown, it is a schematic structural diagram of the optical lens of Embodiment 3-2. The bearing and abutting manners of the other spacer elements are similar to those in Embodiment 3-1. For the relevant descriptions in Embodiment 3-1, reference can be made here and will not be elaborated herein.

[0126] As Figure 16 shown, it is a schematic structural diagram of the optical lens of Embodiment 3-3. The optical lens further includes a sixth secondary auxiliary spacer element P6c, and the sixth secondary auxiliary spacer element P6c is located between the sixth main auxiliary spacer element P6b and the seventh lens E7. The bearing and abutting manners of the other spacer elements are similar to those in Embodiment 3-1. For the relevant descriptions in Embodiment 3-1, reference can be made here and will not be elaborated herein.

[0127] In summary, the structural parameters of the optical lens in Embodiment 3 under Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3 are shown in Table 9.

[0128] In Embodiment 3, the first lens has a positive optical power. The object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens has a negative optical power. The object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens has a positive optical power. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens has a negative optical power. The object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens has a positive optical power. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is convex. The sixth lens has a negative optical power. The object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. The seventh lens has a negative optical power. The object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave. In Table 6 below, OBJ is the object surface, STO is the aperture stop, the aperture stop is located on the first lens, S15 and S16 are respectively the object side and the image side of the filter or the protective glass, and S17 is the imaging surface.

[0129] Table 6 shows the basic structural parameter table of the optical lens in Embodiment 3, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0130]

[0131] Table 6

[0132] Table 7 shows the higher-order term coefficients available for each aspherical mirror surface in Embodiment 3, where each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above. In this embodiment, the object sides and the image sides of the first lens to the seventh lens are all aspherical surfaces.

[0133] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -2.8196E-05 1.4647E-03 -1.0757E-03 4.8095E-04 -1.3264E-04 2.2730E-05 -2.3138E-06 1.2307E-07 -2.5557E-09 S2 -1.1551E-02 5.4917E-03 -1.2230E-03 1.4065E-04 -8.9834E-06 3.3522E-07 -7.2981E-09 8.6067E-11 -4.2543E-13 S3 1.7241E-03 -1.0164E-02 8.9724E-03 -4.4902E-03 1.4537E-03 -3.0937E-04 4.1773E-05 -3.2074E-06 1.0593E-07 S4 8.1942E-03 -6.6060E-03 1.7088E-03 9.5979E-04 -1.0614E-03 4.2974E-04 -9.0981E-05 9.9892E-06 -4.4074E-07 S5 3.8751E-03 -3.8277E-03 2.2449E-03 -2.2949E-03 1.3433E-03 -4.7207E-04 9.7892E-05 -1.0728E-05 4.7394E-07 S6 2.5817E-03 -6.5809E-03 3.4699E-03 -2.0548E-03 7.6107E-04 -2.0427E-04 4.2633E-05 -5.5058E-06 2.9729E-07 S7 -1.3354E-02 1.6497E-03 -5.3748E-03 4.7336E-03 -2.4130E-03 7.1176E-04 -1.1639E-04 9.4954E-06 -2.8216E-07 S8 -8.0422E-03 6.3229E-04 -9.7683E-04 3.4460E-04 -3.6965E-05 -1.1572E-05 4.4664E-06 -5.8592E-07 2.8479E-08 S9 7.3095E-03 3.1236E-03 -3.2833E-03 1.3703E-03 -3.5205E-04 5.7448E-05 -5.7950E-06 3.2674E-07 -7.7916E-09 S10 2.5960E-02 -2.1602E-02 8.0364E-03 -2.0203E-03 3.5870E-04 -4.3476E-05 3.3543E-06 -1.4621E-07 2.7143E-09 S11 5.7678E-02 -2.5964E-02 7.9710E-03 -1.8780E-03 2.9368E-04 -2.8747E-05 1.6624E-06 -5.0667E-08 6.0387E-10 S12 1.4004E-02 3.9464E-03 -2.8329E-03 5.8543E-04 -6.5201E-05 4.2679E-06 -1.6215E-07 3.2813E-09 -2.7185E-11 S13 -6.2062E-02 1.1226E-02 -1.3096E-03 1.0120E-04 -4.9691E-06 1.5094E-07 -2.7237E-09 2.6642E-11 -1.0856E-13 S14 -3.4937E-02 7.2338E-03 -1.0388E-03 9.3118E-05 -5.0972E-06 1.6893E-07 -3.2896E-09 3.4513E-11 -1.5025E-13

[0134] Table 7

[0135] Figure 17 shows the axial chromatic aberration curve of the optical lens in Embodiment 3, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical lens. Figure 18 shows the astigmatism curve of the optical lens in Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 19 shows the distortion curve of the optical lens in Embodiment 3, which represents the distortion magnitude values corresponding to different field angles.

[0136] According to Figures 17 to 19 it can be known that the optical lens given in Embodiment 3 can achieve good imaging quality.

[0137] In summary, the optical lenses in Embodiments 1 to 3 respectively satisfy the relationships shown in Table 8.

[0138]

[0139]

[0140] Table 8

[0141] Table 9 shows some parameters (unit: mm) of the optical lenses in Embodiment 1 to Embodiment 3.

[0142] Parameter / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d2s 4.795 4.795 4.795 4.396 4.394 4.394 4.955 4.473 4.955 d3s 4.940 4.940 4.940 4.533 4.530 4.530 4.508 4.491 4.508 D3s 7.600 7.600 7.600 5.549 5.546 5.546 7.300 7.283 7.300 d4s 5.507 5.507 5.540 5.452 5.448 5.448 5.298 5.282 5.298 d4m 5.463 5.463 5.535 5.408 5.404 5.404 5.254 5.141 5.254 D4s 8.387 8.387 8.387 8.850 8.846 8.846 9.500 9.484 9.500 d5s 6.510 6.510 6.748 6.828 6.822 6.822 6.712 6.698 6.712 d5m 6.510 6.510 6.704 6.779 6.778 6.778 6.646 6.632 6.646 d0s 7.230 7.230 7.230 6.465 6.465 6.465 5.276 5.258 5.276 EP23 0.403 0.403 0.403 0.339 0.716 0.743 0.324 0.324 0.324 CP3 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 EP34 0.556 0.556 0.579 0.889 0.339 0.339 0.914 0.914 0.914 EP45 0.631 0.631 0.578 0.956 0.889 0.889 1.008 1.008 1.008 |SAG51| 0.726 0.726 0.702 0.381 0.500 0.500 0.948 0.948 0.948 f 6.650 6.650 6.650 6.650 6.650 6.650 6.859 6.859 6.859 f1 11.777 11.777 11.777 9.616 9.616 9.616 9.524 9.524 9.524 f2 80.795 80.795 80.795 -36.561 -36.561 -36.561 -38.556 -38.556 -38.556 f3 -208.445 -208.445 -208.445 24.422 24.422 24.422 37.904 37.904 37.904 f4 41.347 41.347 41.347 -22.868 -22.868 -22.868 -90.193 -90.193 -90.193 f5 -31.697 -31.697 -31.697 6.610 6.610 6.610 5.043 5.043 5.043 f6 7.711 7.711 7.711 -11.118 -11.118 -11.118 -7.669 -7.669 -7.669 f7 -7.711 -7.711 -7.711 -48.880 -48.880 -48.880 -12.398 -12.398 -12.398 f45 -163.419 -163.419 -163.419 8.657 8.657 8.657 5.318 5.318 5.318 FOV 86.521 86.521 86.521 85.409 85.409 85.409 86.117 86.117 86.117

[0143] Table 9

[0144] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0145] Obviously, the above-described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0146] It should be noted that the terms used herein are only for describing specific embodiments, rather than intending 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 "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0147] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0148] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. 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, 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 comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are arranged in sequence from the object side to the image side along the optical axis direction, wherein the first lens has positive optical power; the seventh lens has negative optical power; the object 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 concave 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 concave surface; The spacer element group includes at least a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and is in contact with the image side surface portion of the fourth lens; The maximum effective radius DT41 of the object side of the fourth lens and the maximum effective radius DT51 of the object side of the fifth lens satisfy: 1.17 <DT51 / DT41<1.33; The combined focal length f45 of the fourth lens and the fifth lens, the outer diameter D4s of the object side surface of the fourth spacing element, and the inner diameter d4s of the object side surface of the fourth spacing element satisfy the following: -0.04<(D4s-d4s) / f45<0.81; The inner diameter d4m of the image side surface of the fourth spacing element and the maximum effective radius DT51 of the object side surface of the fifth lens satisfy: 1.73 <d4m / DT51<1.92。 2. The optical lens according to claim 1, characterized in that: The inner diameter d4m of the image side surface of the fourth spacing element and the spacing distance |SAG51| from the intersection of the object side surface of the fifth lens and the optical axis to the object side surface of the non-effective diameter region of the fifth lens along the optical axis direction satisfy: 5.40 <d4m / |SAG51|<14.20。 3. The optical lens according to claim 1, characterized in that: The effective focal length f4 of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacing element satisfy: -0.26 <d4s / f4<0.15。 4. The optical lens according to claim 1, characterized in that: The inner diameter d0s of the object side end surface of the lens barrel, the maximum effective radius DT71 of the object side surface of the seventh lens, and the maximum effective radius DT11 of the object side surface of the first lens satisfy the following conditions: 2.45 <d0s / (DT71-DT11)<3.40。 5. The optical lens according to claim 1, characterized in that: The spacer element group further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and partially contacts the image side surface of the fifth lens, and the spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis, the center thickness CT5 of the fifth lens, and the air spacing T45 between the fourth lens and the fifth lens on the optical axis satisfy: 0.36 <EP45 / (T45+CT5)<0.60。 6. The optical lens according to claim 1, 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 spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis and the combined focal length f45 of the fourth lens and the fifth lens satisfy: 0≤EP45 / f45<0.

21.

7. The optical lens according to claim 1, 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, and a spacing distance EP45 between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis, and a spacing distance |SAG51| from the intersection of the object side surface of the fifth lens and the optical axis to the object side surface of the non-effective diameter region of the fifth lens along the optical axis direction satisfy: 0.38<|SAG51| / EP45<1.

24.

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 partially contacts the image side surface of the third lens, and the maximum effective radius DT41 of the object side surface of the fourth lens, the maximum effective radius DT42 of the image side surface of the fourth lens, and the spacing distance EP34 between the image side surface of the third spacer element and the object side surface of the fourth spacer element along the optical axis direction satisfy: 5.28<(DT41+DT42) / EP34<14.

6.

9. The optical lens according to claim 1, characterized in that: 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 is in contact with the image side surface of the third lens, and an outer diameter D3s of the object side surface of the third spacer element and an outer diameter D4s of the object side surface of the fourth spacer element satisfy: 1.08 <D4s / D3s<1.62。 10. The optical lens according to claim 1, characterized in that: 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 is in contact with the image side surface portion of the third lens, and the air gap T34 between the third lens and the fourth lens on the optical axis and the maximum thickness CP3 of the third spacer element along the optical axis satisfy: 4.82 <T34 / CP3<6.84。

Images