Optical lens

Abstract

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

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging equipment technical field, specifically, relate to an optical lens. BACKGROUND

[0002] With the development of electronic products, the user is more and more high to the optical lens of electronic product, and in order to meet the demand of user to the shooting function, optical lens gradually develops to high pixel direction. Usually in order to the lens quantity more optical lens, its pixel is higher, but the optical element in optical lens increases also can cause the problem such as poor assembly stability, stray light. Especially the lens group in the middle region of optical lens, not only play the transmission of light in front optical system and rear optical system, also affect the stability of front optical system and rear optical system. In some optical lens, in order to improve the assembly stability of lens in the center region position of optical lens, stray light is caused, and the imaging quality is affected.

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

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

[0005] In order to achieve the above purpose, according to one aspect of the utility model, an optical lens is provided, which 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 arranged in order along the optical axis direction from the object side to the image side. The spacer element group comprises at least a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side surface of the third lens, and the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The center thickness CT4 of the fourth lens on the optical axis, the air gap T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.07≤(CP4+CT4) / T34≤1.5. The combined focal length f45 of the fourth lens and the fifth lens and the spacing distance EP34 between the third spacer element and the fourth spacer element satisfy: 18.82≤f45 / EP34≤24.58.

[0006] According to another aspect of the utility model, provide a kind of optical lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is made of seven lenses, and lens group includes sequentially arranged first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens from object side to image side along the direction of optical axis;Spacer element group at least includes fifth spacer element and sixth spacer element, fifth spacer element is located between fifth lens and sixth lens and with the image side part of fifth lens contact, sixth spacer element is located between sixth lens and seventh lens and with the image side part of sixth lens contact, the interval distance EP56 between fifth spacer element and sixth spacer element, the center thickness CT6 of sixth lens on optical axis, between fifth lens and sixth lens air interval T56 meet:2.59≤(CT6+T56) / EP56≤3.28;The inner diameter d0m of image side end surface of lens barrel, the refractive index N7 of seventh lens, the radius of curvature R13 of object side surface of seventh lens meet:-4.27≤d0m*N7 / R13≤-3.82.

[0007] According to another aspect of the utility model, provide a kind of optical lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is made of seven lenses, and lens group includes sequentially arranged first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens from object side to image side along the direction of optical axis;Spacer element group at least includes second spacer element and third spacer element, second spacer element is located between second lens and third lens and with the image side part of second lens contact, third spacer element is located between third lens and fourth lens and with the image side part of third lens contact, fourth spacer element is located between fourth lens and fifth lens and with the image side part of fourth lens contact;The center thickness CT3 of third lens on optical axis, the air interval T23 of second lens and third lens on optical axis, the interval distance EP23 between second spacer element and third spacer element meet:2.18≤(EP23+CT3) / T23≤3.32;The inner diameter d3m of image side surface of third spacer element, the refractive index N4 of fourth lens, the radius of curvature R8 of image side surface of fourth lens meet:3.59≤R8*N4 / d3m≤5.46.

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

[0009] Further, the third lens has a convex image side surface, and a radius of curvature R6 of the image side surface of the third lens, an outer diameter D3s of the object side surface of the third spacer element, and an inner diameter d3s of the object side surface of the third spacer element satisfy -13.29≤R6 / (D3s-d3s)≤-3.55.

[0010] Further, the third lens has a convex image side surface, and a radius of curvature R6 of the image side surface of the third lens, an outer diameter D3s of the object side surface of the third spacer element, and an inner diameter d3s of the object side surface of the third spacer element satisfy -13.29≤R6 / (D3s-d3s)≤-3.55.

[0011] Further, the spacer element assembly further includes a second spacer element, the second spacer element is located between the second lens and the third lens and partially contacts an image side surface of the second lens, a central thickness CT3 of the third lens on the optical axis, an air interval T23 of the second lens and the third lens on the optical axis, and a separation distance EP23 between the second spacer element and the third spacer element satisfy 2.18≤(EP23+CT3) / T23≤3.32.

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

[0013] Further, the fifth lens has a convex image side surface, the spacer element assembly further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and partially contacts an image side surface of the fifth lens, and an outer diameter D5s of an object side surface of the fifth spacer element and a radius of curvature R10 of the image side surface of the fifth lens satisfy -1.63≤R10 / D5s≤-1.33.

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

[0015] Further, the seventh lens has a concave image side surface, the spacer element assembly further includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts an image side surface of the sixth lens, and an outer diameter D6m of an image side surface of the sixth spacer element and a radius of curvature R14 of the image side surface of the seventh lens satisfy 3.78≤D6m / R14≤4.25.

[0016] Further, the image-side surface of the sixth lens is convex, the spacer element assembly further comprises a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts the image-side surface of the sixth lens, the inner diameter d6s of the object-side surface of the sixth spacer element, the outer diameter D6s of the object-side surface of the sixth spacer element, the radius of curvature R12 of the image-side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.01.

[0017] Further, the seventh lens has negative refractive power, the spacer element assembly further comprises a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts the image-side surface of the sixth lens, the maximum thickness CP6 of the sixth spacer element, the effective focal length f7 of the seventh lens satisfy: -8.9≤f7 / CP6≤-5.87.

[0018] Further, the spacer element assembly further comprises a fifth spacer element and a sixth 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, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts the image-side surface of the sixth lens, the interval distance EP56 between the fifth spacer element and the sixth spacer element, the central thickness CT6 of the sixth lens on the optical axis, the air interval T56 of the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28.

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

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

[0021] The utility model discloses a technical scheme, optical lens includes lens barrel and the lens group and interval element group of setting in lens barrel, and the lens group is composed of seven lenses, and the lens group includes first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens that sequentially arrange from object side to image side along the direction of optical axis, and interval element assembly at least includes third interval element and fourth interval element, and the third interval element is located between third lens and fourth lens and contacts the image side surface part of third lens, and the fourth interval element is located between fourth lens and fifth lens and contacts the image side surface part of fourth lens, and the central thickness CT4 of fourth lens on the optical axis, the air interval T34 of third lens and fourth lens on the optical axis, the maximum thickness CP4 of fourth interval element satisfy: 1.07 <= (CP4+CT4) / T34 <=1.5, and the combined focal length f45 of fourth lens and fifth lens, the interval distance EP34 between third interval element and fourth interval element satisfy: 18.82 <= f45 / EP34 <=24.58.

[0022] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one interval element, and when the central thickness CT4 of the fourth lens on the optical axis, the air interval T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth interval element satisfy 1.07 <= (CP4+CT4) / T34 <=1.5, the interference between the fourth lens and the third lens can be reduced when the fourth lens is assembled, which is conducive to improving the stability of the fourth lens assembly. Meanwhile, the maximum thickness CP4 of the fourth interval element and the central thickness CT4 of the fourth lens on the optical axis are constrained, which can ensure the structural strength of the fourth lens and the structural strength of the fourth interval element, ensure the stability of the fourth lens structure and the stability of the fourth interval element against the front and rear lenses, and further improve the assembly stability of the optical lens. However, this can easily result in a thick thickness of the fourth interval element, which in turn can easily form reflected stray light at the position of the fourth interval element, and can also result in a large central thickness of the fourth lens, which can prolong the optical path of light in the fourth lens, and in turn affect the exit angle of light, causing part of the light to be reflected to the structure area of the fourth lens to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f45 / EP34 within a reasonable range to adjust the deflection angle of light in the fourth lens and the fifth lens, while ensuring that the light converges to the sixth lens, reducing the large-angle light, which is conducive to reducing the generation of stray light. Meanwhile, the interval distance EP34 between the third interval element and the fourth interval element is constrained, which can constrain the edge thickness range of the fourth lens, is conducive to controlling the structural form of the fourth lens, reducing the generation of welding marks, and avoiding the risk of stray light at the welding marks. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of this application serve to provide further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 A size annotation diagram of an optical lens of an optional embodiment of the present application is shown;

[0025] Figure 2 A structure schematic diagram of an optical lens of embodiment 1-1 of the present application is shown;

[0026] Figure 3 A structure schematic diagram of an optical lens of embodiment 1-2 of the present application is shown;

[0027] Figure 4 and Figure 5 Axial chromatic aberration and astigmatism curves of the optical lens of embodiment one of the present application are shown respectively;

[0028] Figure 6 A structure schematic diagram of an optical lens of embodiment 2-1 of the present application is shown;

[0029] Figure 7 A structure schematic diagram of an optical lens of embodiment 2-2 of the present application is shown;

[0030] Figure 8 and Figure 9 Axial chromatic aberration and astigmatism curves of the optical lens of embodiment two of the present application are shown respectively;

[0031] Figure 10 A structure schematic diagram of an optical lens of embodiment 3-1 of the present application is shown;

[0032] Figure 11 A structure schematic diagram of an optical lens of embodiment 3-2 of the present application is shown;

[0033] Figure 12 and Figure 13 Axial chromatic aberration and astigmatism curves of the optical lens of embodiment three of the present application are shown respectively;

[0034] Figure 14 A structure schematic diagram of an optical lens of embodiment 4-1 of the present application is shown;

[0035] Figure 15 A structure schematic diagram of an optical lens of embodiment 4-2 of the present application is shown;

[0036] Figure 16 and Figure 17The on-axis chromatic aberration and astigmatism curves of the optical lens of Embodiment 4 of this utility model are shown respectively.

[0037] Figure 18 The diagram shows the stray light path of the optical lens in an optional embodiment of the present invention;

[0038] Figure 19 It shows Figure 18 Stray light pattern of a medium optical lens;

[0039] Figure 20 A stray light path diagram of an example optical learning lens is shown;

[0040] Figure 21 It shows Figure 20 Stray light pattern of a medium optical lens;

[0041] Figure 22 Another example of stray light path diagrams from an optical lens is shown;

[0042] Figure 23 It shows Figure 22 A stray light pattern on a medium optical lens.

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

[0044] E1, First lens; P1, First spacer element; E2, Second lens; P2, Second spacer element; E3, Third lens; P3, Third spacer element; E4, Fourth lens; P4, Fourth spacer element; E5, Fifth lens; P5, Fifth spacer element;

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

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0048] In the utility model, in the case where no opposite statement is made, the orientation words such as '' upper, lower, top, bottom '' used are generally directed to the direction shown in the drawing, or directed to the vertical, perpendicular or gravity direction of the component itself; similarly, for the convenience of understanding and description, '' inner, outer '' refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0049] It should be noted that the expressions of first, second, third, etc. in the present specification are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0050] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for the convenience of illustration. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not strictly drawn to scale.

[0051] In this context, 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 skilled in the art, with R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of the object side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; in terms of the image side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. In the present application, the left side is the object side, and the right side is the image side.

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

[0053] As Figures 1 to 17As shown, the optical lens 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, the lens group comprises, 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 at least comprises a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, and the fourth spacer element is located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens; the central thickness CT4 of the fourth lens on the optical axis, the air gap T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.07≤(CP4+CT4) / T34≤1.5; the combined focal length f45 of the fourth lens and the fifth lens, and the spacing distance EP34 between the third spacer element and the fourth spacer element satisfy: 18.82≤f45 / EP34≤24.58.

[0054] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and when the central thickness CT4 of the fourth lens on the optical axis, the air gap T34 of the third lens and the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.07≤(CP4+CT4) / T34≤1.5, the interference between the fourth lens and the third lens during assembly of the fourth lens can be reduced, which is conducive to improving the stability of the fourth lens group. At the same time, the maximum thickness CP4 of the fourth spacer element and the central thickness CT4 of the fourth lens on the optical axis are constrained, which can ensure the structural strength of the fourth lens and the structural strength of the fourth spacer element, ensure the stability of the fourth lens structure and the stability of the fourth spacer element supporting the front and rear lenses, and further improve the assembly stability of the optical lens. However, this can easily result in a thick thickness of the fourth spacer element, which in turn can easily form reflected stray light at the position of the fourth spacer element, and can also result in a large central thickness of the fourth lens, which can prolong the optical path of light in the fourth lens, and in turn affect the exit angle of light, causing part of the light to be reflected to the structure area of the fourth lens to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains f45 / EP34 within a reasonable range to adjust the deflection angle of light in the fourth lens and the fifth lens, while ensuring that the light converges to the sixth lens, reducing the large-angle light, which is conducive to reducing the generation of stray light. At the same time, the spacing distance EP34 between the third spacer element and the fourth spacer element is constrained, which can constrain the edge thickness range of the fourth lens, is conducive to controlling the structural form of the fourth lens, reducing the generation of welding marks, and avoiding the risk of stray light at the welding marks.

[0055] In addition, the range of the constraint (CP4+CT4) / T34, f45 / EP34 can be balanced in a reasonable range, the physical size and optical performance can be balanced, the aberration problem caused by too long focal length or too large thickness or too large air gap can be avoided, the field curvature size can be adjusted, the chromatic aberration, distortion and other problems caused by air gap can be weakened, the lens resolution can be improved, the lens imaging quality can be improved, and the processability of the fourth lens can be ensured.

[0056] In addition, referring to Table 1 and Figures 18 to 23 shown below, Figure 18 the stray light path diagram of the optical lens satisfying (CP4+CT4) / T34=1.5, f45 / EP34=22.30 is shown, Figure 19 the stray light spot diagram of the optical lens is shown. Figure 18 Figure 20 the stray light path diagram of the optical lens satisfying (CP4+CT4) / T34=1.5, f45 / EP34=15 is shown, Figure 21 the stray light spot diagram of the optical lens is shown. Figure 20 Figure 22 the partial light path diagram of the optical lens satisfying (CP4+CT4) / T34=1.5, f45 / EP34=30 is shown, Figure 23 the stray light spot diagram of the optical lens is shown. Figure 22

[0057] As shown in Figures 18 to 23 When the optical lens satisfies (CP4+CT4) / T34=1.5, f45 / EP34=22.30, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical lens satisfies (CP4+CT4) / T34=1.5, f45 / EP34=15, the stray light energy is strong, the stray light has a great influence on the imaging quality, and the performance is poor. When the optical lens satisfies (CP4+CT4) / T34=1.5, f45 / EP34=30, the stray light energy is strong, the stray light has a great influence on the imaging quality, and the performance is poor. Therefore, when 1.07≤(CP4+CT4) / T34≤1.5, 18.82≤f45 / EP34≤24.58, the stray light of the optical lens is improved better. Therefore, by constraining 18.82≤f45 / EP34≤24.58, the deflection angle of light in the fourth lens and the fifth lens is controlled, the light is converged to the sixth lens, the large-angle light is reduced, and the generation of stray light is reduced.

[0058]

[0059] Table 1

[0060] ​​​It should be noted that the present application limits f45 / EP34 within a reasonable range, restricts the relationship between the fourth lens, the fifth lens, the third spacer element, the fourth spacer element, to improve the stray light generated at the fourth lens, to solve the stray light problem when (CP4+CT4) / T34 is in the range of 1.07 to 1.5, when f45 / EP34 meets the above range, the purpose of improving the stray light can be achieved, and it is not dependent on the optical power of the lens and the surface shape of the lens, and the optical power and the surface shape of the lens are further optimized on the basis of the optical lens. Each lens can be positive or negative according to the actual design requirements of the optical system, and the surface shape of each lens can be convex or concave according to the design requirements of the optical system. The optical system satisfies: 1.07≤(CP4+CT4) / T34≤1.5; 18.82≤f45 / EP34≤24.58, so that the optical lens can improve the assembly stability while reducing the influence of stray light.

[0061] For example, in some optional embodiments, the first lens has positive refractive power, by constraining the first lens to have positive refractive power, it is conducive to converging light rays at a large angle into the optical lens, which is conducive to improving the luminous flux. For another example, in some optional embodiments, the second lens has negative refractive power, which can balance the aberration brought by the first lens and improve the imaging quality. For another example, in some optional embodiments, the third lens has positive refractive power, which properly converges light rays and makes the light rays smoothly transition to the rear. For another example, in some optional embodiments, the fourth lens has negative refractive power, which can balance the aberration brought by the third lens and improve the imaging quality. For another example, in some optional embodiments, the fifth lens has positive refractive power, by constraining the fifth lens to have positive refractive power, it is conducive to converging light rays when passing through the fifth lens, so as to facilitate the adaptation with the chip at the imaging surface. For another example, in some optional embodiments, the sixth lens has positive refractive power, by constraining the sixth lens to have positive refractive power, it is conducive to converging light rays when passing through the sixth lens, so as to facilitate the adaptation with the chip at the imaging surface. For another example, in some optional embodiments, the seventh lens has negative refractive power, by constraining the seventh lens to have negative refractive power, it is conducive to properly diverging light rays when passing through the seventh lens, while balancing the aberration brought by the front positive lens and improving the imaging quality. For another example, in some optional embodiments, the object side surface of the first lens is convex, the image side surface of the first lens is concave; the object side surface of the second lens is convex, the image side surface of the second lens is concave; the image side surface of the third lens is convex; the object side surface of the fourth lens is convex, the image side surface of the fourth lens is concave; the object side surface of the fifth lens is convex, the image side surface of the fifth lens is convex; the object side surface of the sixth lens is convex, the image side surface of the sixth lens is convex; the object side surface of the seventh lens is concave, the image side surface of the seventh lens is concave. By reasonably constraining the surface shape of each lens, it is conducive to reasonably constraining the light ray trend and ensuring the smooth transition of light rays, which is conducive to correcting aberration. The optical lens can be simulated by software and / or tools such as ZEMAX, CODEV, etc. Preferably, the optical lens can be simulated by CODEV. In the process of simulation by software and / or tools such as the above, the surface shape of each lens can be simulated according to the surface shape provided by the software and / or tools used and properly adjusted.

[0062] In some optional embodiments, a relationship among a curvature radius R8 of an image side surface of the fourth lens, an outer diameter D4s of an object side surface of the fourth spacer element, and an inner diameter d4s of the object side surface of the fourth spacer element satisfies: 2.11≤R8 / (D4s-d4s)≤6.63. By restricting R8 / (D4s-d4s) within a reasonable range, the bending degree of the image side surface of the fourth lens is restricted, which is conducive to controlling the angle of light rays after exiting the fourth lens, while restricting the outer diameter and the inner diameter of the object side surface of the fourth spacer element can effectively ensure that the imaging light rays smoothly pass through the fourth spacer element, while stray light outside the field of view can be blocked by the fourth spacer element, which is conducive to improving the imaging clarity, while the bearing width of the fourth spacer element can be ensured to guarantee the bearing force of the fourth spacer element on the front and rear lenses, which is conducive to ensuring the assembly stability of the optical lens.

[0063] In some optional embodiments, a relationship among a curvature radius R5 of an object side surface of the third lens, a central thickness CT3 of the third lens on the optical axis, and a maximum thickness CP3 of the third spacer element satisfies: 2.1mm≤|R5| / (CT3 / CP3)≤6.22mm. By restricting |R5| / (CT3 / CP3) within a reasonable range, the structural strength of the third spacer element and the third lens can be guaranteed, the risk of deformation of the third spacer element caused by assembly pressure during assembly can be avoided, and the risk of fragmentation of the third lens caused by improper stress can be reduced, which is conducive to improving the assembly stability of the optical lens, while the bending degree of the object side surface of the third lens can be restricted to control the deflection degree of light rays entering the third lens, and adjusting the thickness of the third spacer element can adjust the field curvature size to improve the resolution of the optical lens and improve the imaging quality of the optical lens.

[0064] In some optional embodiments, a relationship among a curvature radius R6 of an image side surface of the third lens, an outer diameter D3s of an object side surface of the third spacer element, and an inner diameter d3s of the object side surface of the third spacer element satisfies: -13.29≤R6 / (D3s-d3s)≤-3.55. By restricting R6 / (D3s-d3s) within a reasonable range, the bending degree of the image side surface of the third lens is restricted, which can control the exiting angle of light rays from the image side surface of the third lens and reduce the deflection of large-angle light rays, while restricting the outer diameter and the inner diameter of the object side surface of the third spacer element can effectively ensure that the imaging light rays emitted by the third lens smoothly pass through the third spacer element, while stray light outside the field of view can be blocked by the third spacer element, which is conducive to improving the imaging clarity, while the bearing width of the third spacer element can be ensured to guarantee the bearing force of the third spacer element on the third lens and the fourth lens, which is conducive to ensuring the assembly stability of the optical lens.

[0065] In some optional embodiments, the spacer element assembly further comprises a second spacer element located between the second lens and the third lens and in contact with the image-side surface portion of the second lens, the central thickness CT3 of the third lens on the optical axis, the air gap T23 of the second lens and the third lens on the optical axis, and the spacing distance EP23 between the second spacer element and the third spacer element satisfy: 2.18≤(EP23+CT3) / T23≤3.32. By restricting (EP23+CT3) / T23 within a reasonable range, the positions and the space sizes occupied by the second lens and the third lens in the lens barrel are beneficially distributed to ensure the miniaturization of the optical lens, and by restricting the distance between the second spacer element and the third spacer element, the edge thickness of the second lens is ensured to be within a reasonable range, which is beneficial to control the structural form of the second lens and the third lens, and the overall thickness-thinness ratio is more reasonable, which is beneficial to the molding of the second lens and the third lens. At the same time, the air gap of the second lens and the third lens on the optical axis is restricted, which can reduce the sensitivity of the optical lens to the change of the air gap, and is beneficial to improve the imaging quality.

[0066] In some optional embodiments, the spacer element assembly further comprises a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image-side surface portion of the fifth lens, the spacing distance EP34 between the third spacer element and the fourth spacer element, and the on-axis distance SAG41 between the intersection of the object-side surface of the fourth lens and the optical axis and the effective radius vertex of the object-side surface of the fourth lens satisfy: -3.1≤EP34 / SAG41≤-1.85. By restricting EP34 / SAG41 within a reasonable range, the structural form of the fourth lens is beneficially restricted, the overall thickness-thinness ratio of the fourth lens is ensured, and the sag of the object-side surface of the fourth lens is restricted, which is beneficial to control the overall form of the fourth lens, and at the same time, the spacing distance between the third spacer element and the fourth spacer element can restrict the relative distance between the third lens and the fifth lens, which is beneficial to restrict the thickness of the fourth lens, ensure the overall thickness-thinness ratio of the fourth lens, and further beneficial to ensure the structural strength of the fourth lens and reduce the assembly difficulty.

[0067] In some optional embodiments, the spacer element assembly further includes a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a relationship between an outer diameter D5s of the object side surface of the fifth spacer element and a curvature radius R10 of the image side surface of the fifth lens satisfies -1.63≤R10 / D5s≤-1.33. By restricting R10 / D5s within a reasonable range, the degree of curvature of the image side surface of the fifth lens can be controlled, which is conducive to controlling the exiting angle of light from the fifth lens, reducing the deflection of light at a large angle, and reducing the generation of stray light and lowering the sensitivity of the optical system. At the same time, the outer diameter of the fifth spacer element is ensured, which can restrict the abutting range between the fifth spacer element and the fifth lens, ensuring the stability of the assembly while ensuring that the fifth spacer element does not block light.

[0068] In some optional embodiments, the spacer element assembly further includes a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens, and a relationship between an inner diameter d0m of the image side end surface of the lens barrel, a refractive index N7 of the seventh lens, and a curvature radius R13 of the object side surface of the seventh lens satisfies -4.27≤d0m*N7 / R13≤-3.82. By restricting d0m*N7 / R13 within a reasonable range, the deflection ability of the seventh lens for light can be optimized, thereby reducing common aberrations such as spherical aberration, coma, or astigmatism, and matching the inner diameter d0m of the image side end surface of the lens barrel can also control the range of light exiting from the seventh lens, ensuring that the imaging light is smoothly incident to the imaging surface, reducing the generation of stray light, ensuring the light transmission efficiency while improving the imaging quality.

[0069] In some optional embodiments, the spacer element assembly further includes a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface portion of the sixth lens, and a relationship between an outer diameter D6m of the image side surface of the sixth spacer element and a curvature radius R14 of the image side surface of the seventh lens satisfies 3.78≤D6m / R14≤4.25. By restricting D6m / R14 within a reasonable range, the abutting range of the sixth spacer element to the seventh lens can be controlled to ensure the stability of the seventh lens assembly while restricting the exiting angle of light from the seventh lens, so as to control the matching of the CRA of the optical lens and the CRA of the chip, reduce the sensitivity of the optical system, and improve the imaging quality.

[0070] In some optional embodiments, the spacer element assembly further comprises a sixth spacer element located between the sixth lens and the seventh lens and in contact with a part of the image side surface of the sixth lens, and an inner diameter d6s of the object side surface of the sixth spacer element, an outer diameter D6s of the object side surface of the sixth spacer element, and a radius of curvature R12 of the image side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.01. By restricting R12 / (D6s-d6s) within a reasonable range, the abutting width of the sixth spacer element and the sixth lens can be restricted, the stability of the sixth lens group can be ensured, the bending degree of the image side surface of the sixth lens can be restricted, the angle of light exiting the sixth lens can be controlled, the imaging light can smoothly pass through the sixth spacer element, the field curvature can be adjusted to reduce aberration, the sixth spacer element can also block stray light outside the field of view, the imaging clarity when the light passes from the sixth lens to the seventh lens can be ensured, and the imaging quality can be improved.

[0071] In some optional embodiments, the spacer element assembly further comprises a sixth spacer element located between the sixth lens and the seventh lens and in contact with a part of the image side surface of the sixth lens, and a maximum thickness CP6 of the sixth spacer element and an effective focal length f7 of the seventh lens satisfy: -8.9≤f7 / CP6≤-5.87. By controlling the ratio of the effective focal length of the seventh lens and the maximum thickness of the sixth spacer within a certain range, the physical size and optical performance can be balanced, the aberration problem caused by excessive focal length or excessive air gap between lenses can be avoided, and the stability of the system can be enhanced by reasonably controlling the ratio, and the influence of temperature change or vibration on the imaging quality can be reduced.

[0072] In some optional embodiments, the spacer element assembly further comprises a fifth spacer element and a sixth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and in contact with a part of the image side surface of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and in contact with a part of the image side surface of the sixth lens, and a separation distance EP56 between the fifth spacer element and the sixth spacer element, a central thickness CT6 of the sixth lens on the optical axis, and an air separation T56 of the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.28. By restricting (CT6+T56) / EP56 within a reasonable range, the relative position of the fifth spacer element and the sixth spacer element can be restricted, and the edge thickness of the sixth lens can be effectively restricted within a reasonable range, the overall thickness ratio of the sixth lens can be effectively restricted, the molding of the sixth lens can be facilitated while the structural strength of the sixth lens is ensured, the assembly stability can be improved, and the air separation between the fifth lens and the sixth lens can be restricted to reduce the sensitivity of the optical lens to air separation changes.

[0073] In another optional embodiment, the optical lens comprises a lens barrel, and a lens set and a spacer element set arranged in the lens barrel, the lens set comprises seven lenses, and the lens set comprises, in sequence from the object side to the image side along the optical axis, 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 set comprises at least a fifth spacer element and a sixth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens, and the following conditions are met: 2.59≤(CT6+T56) / EP56≤3.28, where EP56 is the spacing distance between the fifth spacer element and the sixth spacer element, CT6 is the center thickness of the sixth lens along the optical axis, and T56 is the air spacing between the fifth lens and the sixth lens along the optical axis; the following conditions are met: -4.27≤d0m*N7 / R13≤-3.82, where d0m is the inner diameter of the image side end surface of the lens barrel, N7 is the refractive index of the seventh lens, and R13 is the curvature radius of the object side surface of the seventh lens.

[0074] The optical lens of the present application is composed of a lens barrel, seven lenses, and at least one spacer element, and when the following conditions are met: 2.59≤(CT6+T56) / EP56≤3.28, where EP56 is the spacing distance between the fifth spacer element and the sixth spacer element, CT6 is the center thickness of the sixth lens along the optical axis, and T56 is the air spacing between the fifth lens and the sixth lens along the optical axis, the relative positions of the fifth spacer element and the sixth spacer element can be constrained, and the edge thickness of the sixth lens can be effectively constrained within a reasonable range, the overall thickness ratio of the sixth lens can be effectively constrained, the molding of the sixth lens is facilitated while the structural strength of the sixth lens is ensured, the assembly stability is improved, but this can easily lead to a small space at the rear end of the optical lens and a small process operation space, thereby reducing the design freedom of the optical elements at the rear end and increasing the difficulty of improving stray light, which affects the imaging quality. In order to reduce the generation of stray light, the present application constrains d0m*N7 / R13 within a reasonable range, optimizes the deflection ability of the seventh lens to light, thereby reducing common aberrations such as spherical aberration, coma, and astigmatism, and matching the inner diameter d0m of the image side end surface of the lens barrel can also control the range of light emitted from the seventh lens, ensure that the imaging light is smoothly incident on the imaging surface, reduce the risk of the lens barrel reflecting light back to the optical system, thereby facilitating the reduction of stray light generation, ensuring the light transmission efficiency while improving the imaging quality.

[0075] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be described here.

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

[0077] The optical lens of this application consists of a lens barrel, seven lenses, and at least one spacer element. When the central thickness CT3 of the third lens on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the spacing distance EP23 between the second and third spacer elements satisfy the condition 2.18≤(EP23+CT3) / T23≤3.32, it is beneficial to allocate the positions and space occupied by the second and third lenses in the lens barrel to ensure the miniaturization of the optical lens. It also constrains the distance between the second and third spacer elements and the central thickness of the third lens, which helps to ensure the relative positions of the third lens and the spacer elements on both sides of the third lens, thus ensuring the stability of the bearing between the second spacer element, the third lens, and the third spacer element, and improving the assembly stability. At the same time, it constrains the air gap between the second and third lenses on the optical axis to reduce the impact of the air gap on the imaging performance, reduce the sensitivity of the optical system, and avoid collisions with the second lens during assembly. However, this can easily lead to significant deflection of the surface of the third lens at the junction of the optical structure area and the optical effective area, causing part of the surface of the optical structure area to face the optical axis. Light is easily reflected at this point, forming stray light and affecting image quality. To reduce the generation of this stray light, this application constrains R8*N4 / d3m within a reasonable range, controlling the deflection capability of the fourth lens, reducing the light reflected to the optical structure area of ​​the third lens, and reducing stray light generation. Simultaneously, it controls the angle at which light exits through the fourth lens to further reduce stray light generation. Matching the inner diameter with the third spacer element also controls the incident angle of light entering the object side of the fourth lens. While ensuring that imaging light passes smoothly through the third spacer element into the fourth lens, the third spacer element can block some non-imaging light, reducing stray light generation and improving image quality while ensuring light transmission efficiency.

[0078] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0079] In some alternative embodiments, the above-mentioned multiple lenses may include at least one tangent lens. The outer peripheral surface of the tangent lens may have a tangent portion and a non-tangent portion, and the outer diameter of the tangent portion of the lens is smaller than the outer diameter of the non-tangent portion of the lens. When the outer peripheral surface of the lens has a tangent portion, the outer diameter of the lens usually refers to the outer diameter of the non-tangent portion of the lens.

[0080] In some alternative embodiments, at least one of the plurality of spacers described above may be a truncated spacer. The outer peripheral surface of the truncated spacer may have a truncated portion and a non-truncated portion, and the outer diameter of the truncated portion of the truncated spacer is smaller than the outer diameter of the non-truncated portion of the truncated spacer. The outer diameter of the spacer typically refers to the maximum outer diameter of the non-truncated portion.

[0081] Optionally, the optical lens described above can further comprise a protective glass for protecting the photosensitive element located on the imaging surface.

[0082] It should be noted that each lens is composed of a central optical effective diameter region and an edge structure region, the edge structure region is located at the outer circumferential side of the central optical effective region and is arranged around the circumference of the central optical effective diameter region. The central optical effective region is used for the passing of imaging light, and the edge structure region is not used for the passing of imaging light, and is used for abutting with a lens barrel or an adjacent lens or an adjacent spacer element. The edge structure region is also referred to as a non-effective diameter region.

[0083] The optical lens in the present application can adopt multiple lenses, for example, the seven lenses described above. In the present application, at least one of the mirror surfaces of each lens is a non-spherical mirror surface. The characteristic of the non-spherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the non-spherical lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After adopting the non-spherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0084] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although the seven lenses are described as an example in the embodiments, the optical lens is not limited to comprising seven lenses. If necessary, the optical lens can also comprise other numbers of lenses.

[0085] Figure 1 The size annotation diagram of one optical lens of the present application is shown, Figure 1 The parameters d3s, D3s, d4s, D4s, D5s, d6s, D6s, D6m, CP3, CP4, CP6, EP23, EP34, EP45, EP56, etc. are marked in the figure, so that the meaning of the parameters can be clearly and intuitively understood. In order to facilitate the description of the optical lens and the surface type of the specific lens, these parameters will not be embodied in the figure when the specific embodiments are described subsequently.

[0086] The specific surface type and parameters of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0087] It should be noted that there are two examples, example 1-1 and example 1-2, in the following embodiment one, two examples, example 2-1 and example 2-2, in the following embodiment two, two examples, example 3-1 and example 3-2, in the following embodiment three, and two examples, example 4-1 and example 4-2, in the following embodiment four. The curvature radius, central thickness and other parameters of the first lens to the seventh lens of the optical lens in the two examples in the same embodiment are the same, but the thickness, inner diameter and outer diameter of the barrel, the first spacing element, the second spacing element, the third spacing element and other spacing elements, and the shape of part of the lens are different. Or, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0088] It should be noted that any of the following embodiments one to four is applicable to all embodiments of the present application.

[0089] Embodiment one

[0090] As shown in Figures 2 to 5 , the optical lens of embodiment one is described. Figure 2 The structural schematic diagram of the optical lens of example 1-1 is shown, Figure 3 The structural schematic diagram of the optical lens of example 1-2 is shown.

[0091] As shown in Figure 2 and Figure 3 , the optical lens includes a barrel, seven lenses and multiple spacing elements, the barrel includes, in order from the object side to the image side, a first lens E1, a first spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, a fifth lens E5, a fifth spacing element P5, a sixth lens E6, a sixth spacing element P6, a sixth auxiliary spacing element P6b and a seventh lens E7.

[0092] As shown in Figure 2Fig. 1 shows a structural schematic diagram of the optical lens of Example 1-1. In this example, the object side S1 of the first lens abuts against the lens barrel portion. The object side and the image side of the first spacer element P1 partially abut against the image side S2 of the first lens and the object side S3 of the second lens, respectively. The object side and the image side of the second spacer element P2 partially abut against the image side S4 of the second lens and the object side S5 of the third lens, respectively. The object side and the image side of the third spacer element P3 partially abut against the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and the image side of the fourth spacer element P4 partially abut against the image side S8 of the fourth lens and the object side S9 of the fifth lens, respectively. The object side and the image side of the fifth spacer element P5 partially abut against the image side S10 of the fifth lens and the object side S11 of the sixth lens, respectively. The object side and the image side of the sixth spacer element P6 partially abut against the image side S12 of the sixth lens and the object side of the sixth auxiliary spacer element, respectively. The image side of the sixth auxiliary spacer element partially abuts against the object side S13 of the seventh lens. The image side S14 of the seventh lens is spaced apart from the lens barrel.

[0093] As shown in Fig. 2, a structural schematic diagram of the optical lens of Example 1-2 is shown. In this example, the abutting abutment modes of the spacer elements are the same as those of Example 1-1, and the relevant description in Example 1-1 can be referred to, which will not be described herein. Figure 3

[0094] In summary, the structural parameters of the optical lens of Example 1 in Example 1-1 and Example 1-2 are shown in Table 11.

[0095] In Example 1, the first lens E1 has positive refractive 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 E2 has negative refractive 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 E3 has positive refractive power, the object side S5 of the third lens is concave, and the image side S6 of the third lens is convex. The fourth lens E4 has negative refractive 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 E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has positive refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is convex. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is concave, and the image side S14 of the seventh lens is concave.

[0096] Table 2 shows the basic structural parameter table of the optical lens of Example 1, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0097] ​

[0098]

[0099] Table 2

[0100] In embodiment one, the object side and the image side of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0101]

[0102] wherein x is the sag of the aspherical surface at a position along the optical axis at a height of h, c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above, k is the conic coefficient, and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below provides the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical surface S1-S14 in embodiment one.

[0103]

[0104]

[0105] Table 3

[0106] Figure 4 The on-axis chromatic aberration curve of the optical lens of embodiment one is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical lens. Figure 5 The astigmatism curve of the optical lens of embodiment one is shown, which represents the meridional image curvature and sagittal image curvature.

[0107] According to Figure 4 and Figure 5 it can be known that the optical lens given in embodiment one can achieve good imaging quality.

[0108] Embodiment two

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

[0110] As Figure 6 and Figure 7As shown, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes, in order from the object side to the image side, 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 auxiliary spacer element P6b, and a seventh lens E7.

[0111] As shown, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes, in order from the object side to the image side, 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 auxiliary spacer element P6b, and a seventh lens E7. Figure 6 As shown, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes, in order from the object side to the image side, 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 auxiliary spacer element P6b, and a seventh lens E7.

[0112] As shown, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes, in order from the object side to the image side, 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 auxiliary spacer element P6b, and a seventh lens E7. Figure 7 As shown, the optical lens includes a lens barrel, seven lenses, and a plurality of spacer elements. The lens barrel includes, in order from the object side to the image side, 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 auxiliary spacer element P6b, and a seventh lens E7.

[0113] In summary, the structure parameters of the optical lens in Example 2-1 and Example 2-2 are shown in Table 11.

[0114] In embodiment two, the first lens E1 has positive refractive 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 E2 has negative refractive 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 E3 has positive refractive 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 E4 has negative refractive 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 E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has positive refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is convex. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is concave, and the image side S14 of the seventh lens is concave.

[0115] Table 4 shows the basic structure parameter table of the optical lens of embodiment two, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0116]

[0117] Table 4

[0118] The following table 5 gives the high order term coefficients of each aspherical surface S1-S14 that can be used in embodiment two. Wherein each aspherical surface type can be defined by the formula (1) given in the above embodiment one.

[0119]

[0120]

[0121] Table 5

[0122] Figure 8 The axial chromatic aberration curve of the optical lens of embodiment two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical lens. Figure 9 The astigmatism curve of the optical lens of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature.

[0123] According to Figure 8 and Figure 9 It can be known that the optical lens given in embodiment two can achieve good imaging quality.

[0124] Embodiment three

[0125] As Figures 10 to 13 shown, the optical lens of embodiment three is described. Figure 10 The structural schematic diagram of the optical lens of embodiment 3-1 is shown, Figure 11 The structural schematic diagram of the optical lens of embodiment 3-2 is shown.

[0126] As shown in Figure 10 and Figure 11 , the optical lens comprises a lens barrel, seven lenses and a plurality of spacer elements, the lens barrel comprises, in sequence from the object side to the image side, 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 auxiliary spacer element P6b and a seventh lens E7.

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

[0128] As shown in Figure 11 , it is a structural schematic diagram of the optical lens of embodiment 3-2. In this example, the abutting manner of each spacer element is the same as that of embodiment 3-1, and the relevant description in embodiment 3-1 can be referred to, which will not be repeated here.

[0129] In summary, the structural parameters of the optical lens of embodiment three in embodiment 3-1 and embodiment 3-2 are shown in Table 11.

[0130] In embodiment three, the first lens E1 has positive refractive 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 E2 has negative refractive 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 E3 has positive refractive 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 E4 has negative refractive 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 E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has positive refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is convex. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is concave, and the image side S14 of the seventh lens is concave.

[0131] Table 6 shows the basic structure parameter table of the optical lens of embodiment three, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0132]

[0133] Table 6

[0134] The following table 7 gives the high order term coefficients of each aspherical surface S1-S14 that can be used in embodiment three. Wherein each aspherical surface type can be defined by the formula (1) given in the above embodiment one.

[0135]

[0136]

[0137] Table 7

[0138] Figure 12 The on-axis chromatic aberration curve of the optical lens of embodiment three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical lens. Figure 13 The astigmatism curve of the optical lens of embodiment three is shown, which represents the meridional image surface curvature and sagittal image surface curvature.

[0139] According to Figure 12 and Figure 13 It can be known that the optical lens given in embodiment three can achieve good imaging quality.

[0140] Embodiment four

[0141] As Figures 14 to 17 shown, the optical lens of embodiment four is described. Figure 14 The structural schematic diagram of the optical lens of embodiment 4-1 is shown, Figure 15 The structural schematic diagram of the optical lens of embodiment 4-2 is shown.

[0142] As shown in Figure 14 and Figure 15 , the optical lens comprises a lens barrel, seven lenses and a plurality of spacer elements, the lens barrel comprises, in sequence from the object side to the image side, 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 auxiliary spacer element P6b and a seventh lens E7.

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

[0144] As shown in Figure 15 , it is a structural schematic diagram of the optical lens of embodiment 4-2. In this example, the abutting manner of each spacer element is the same as that of embodiment 4-1, and the relevant description in embodiment 4-1 can be referred to, which will not be repeated here.

[0145] In summary, the structural parameters of the optical lens of embodiment four in embodiment 4-1 and embodiment 4-2 are shown in Table 11.

[0146] In embodiment four, the first lens E1 has positive refractive 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 E2 has negative refractive 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 E3 has positive refractive 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 E4 has negative refractive 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 E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has positive refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is convex. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is concave, and the image side S14 of the seventh lens is concave.

[0147] Table 8 shows the basic structure parameter table of the optical lens of embodiment four, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0148]

[0149] Table 8

[0150] The following table 9 gives the high order term coefficients of the aspherical surfaces S1-S14 that can be used in embodiment four. Wherein each aspherical surface can be defined by the formula (1) given in embodiment one above.

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

[0152] Table 9

[0153] Figure 16 The on-axis chromatic aberration curve of the optical lens of embodiment four is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical lens. Figure 17 The astigmatism curve of the optical lens of embodiment four is shown, which represents the meridional image surface curvature and sagittal image surface curvature.

[0154] According to Figure 16 and Figure 17 It can be known that the optical lens given in embodiment four can achieve good imaging quality.

[0155] In summary, the optical lenses of embodiments one to four respectively satisfy the relationships shown in table 10.

[0156]

[0157]

[0158] Table 10

[0159] Table 11 shows the partial parameters (in mm) of the optical lens of Embodiment One to Embodiment Four.

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

[0161] Table 11

[0162] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be a standalone imaging apparatus 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.

[0163] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0164] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0165] It is to be noted that the terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of efficient implementation irrespective of the particular order of steps involved.

[0166] The preferred embodiments of the present application have been described above with the specific embodiments. The application is not limited to the above embodiments. It will be appreciated by those skilled in the art that any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. An optical lens characterized in that, The lens barrel includes a lens barrel body, a lens group and a spacer element group disposed in the lens barrel body, The lens group is composed of seven lenses, and includes, in order from an object side to an image side along an 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 third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts an image side surface portion of the third lens, and the fourth spacer element is located between the fourth lens and the fifth lens and contacts an image side surface portion of the fourth lens. A central thickness CT4 of the fourth lens on the optical axis, an air gap T34 of the third lens and the fourth lens on the optical axis, and a maximum thickness CP4 of the fourth spacer element satisfy: 1.07≤(CP4+CT4) / T34≤1.

5. A combined focal length f45 of the fourth lens and the fifth lens, and a separation distance EP34 between the third spacer element and the fourth spacer element satisfy: 18.82≤f45 / EP34≤24.

58.

2. The optical lens of claim 1, wherein, An image side surface of the fourth lens is a concave surface, a curvature radius R8 of the image side surface of the fourth lens, an outer diameter D4s of an object side of the fourth spacer element, and an inner diameter d4s of the object side of the fourth spacer element satisfy: 2.11≤R8 / (D4s-d4s)≤6.

63.

3. The optical lens of claim 1, wherein, A curvature radius R5 of an object side surface of the third lens, a central thickness CT3 of the third lens on the optical axis, and a maximum thickness CP3 of the third spacer element satisfy: 2.1mm≤|R5| / (CT3 / CP3)≤6.22mm.

4. The optical lens of claim 1, wherein, An image side surface of the third lens is a convex surface, a curvature radius R6 of the image side surface of the third lens, an outer diameter D3s of an object side surface of the third spacer element, and an inner diameter d3s of the object side of the third spacer element satisfy: -13.29≤R6 / (D3s-d3s)≤-3.

55.

5. The optical lens of claim 1, wherein, 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 an image side surface of the second lens, a central thickness CT3 of the third lens on the optical axis, an air gap T23 of the second lens and the third lens on the optical axis, and a separation distance EP23 between the second spacer element and the third spacer element satisfy: 2.18≤(EP23+CT3) / T23≤3.

32.

6. The optical lens of claim 1, wherein, A separation distance EP34 between the third spacer element and the fourth spacer element, and an on-axis distance SAG41 between an intersection of an object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens satisfy: -3.1≤EP34 / SAG41≤-1.

85.

7. The optical lens of claim 1, wherein, An image-side surface of the fifth lens is convex, the spacer element assembly further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and partially contacts an image-side surface of the fifth lens, an outer diameter D5s of an object-side surface of the fifth spacer element and a curvature radius R10 of the image-side surface of the fifth lens satisfy: -1.63≤R10 / D5s≤-1.

33.

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

82.

9. The optical lens of any of claims 1 to 7, wherein, An image-side surface of the seventh lens is concave, the spacer element assembly further includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts an image-side surface of the sixth lens, an outer diameter D6m of an image-side surface of the sixth spacer element and a curvature radius R14 of the image-side surface of the seventh lens satisfy: 3.78≤D6m / R14≤4.

25.

10. The optical lens of any of claims 1 to 7, wherein, An image-side surface of the sixth lens is convex, the spacer element assembly further includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts an image-side surface of the sixth lens, an inner diameter d6s of an object-side surface of the sixth spacer element, an outer diameter D6s of the object-side surface of the sixth spacer element and a curvature radius R12 of the image-side surface of the sixth lens satisfy: -3.25≤R12 / (D6s-d6s)≤-2.

01.

11. The optical lens of any of claims 1 to 7, wherein, The seventh lens has negative refractive power, the spacer element assembly further includes a sixth spacer element, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts an image-side surface of the sixth lens, a maximum thickness CP6 of the sixth spacer element and an effective focal length f7 of the seventh lens satisfy: -8.9≤f7 / CP6≤-5.

87.

12. The optical lens of any of claims 1 to 7, wherein, The spacer element assembly further includes a fifth spacer element and a sixth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and partially contacts an image-side surface of the fifth lens, the sixth spacer element is located between the sixth lens and the seventh lens and partially contacts an image-side surface of the sixth lens, a spacer distance EP56 between the fifth spacer element and the sixth spacer element, a central thickness CT6 of the sixth lens on the optical axis and an air gap T56 of the fifth lens and the sixth lens on the optical axis satisfy: 2.59≤(CT6+T56) / EP56≤3.

28.

13. The optical lens of any of claims 1 to 7, wherein, The optical lens satisfies at least one of the following: The first lens has positive refractive power, an object-side surface of the first lens is convex, and an image-side surface of the first lens is concave; The fourth lens has negative refractive power, an object-side surface of the fourth lens is convex; The fifth lens has positive refractive power, an object-side surface of the fifth lens is convex; The sixth lens has positive refractive power, an object-side surface of the sixth lens is convex.

14. The optical lens of any of claims 1 to 7, wherein, The optical lens satisfies at least one of the following: The second lens has negative refractive power, an object side surface of the second lens is convex, and an image side surface of the second lens is concave. The third lens has positive refractive power.

Images