Optical lens

Abstract

The utility model provides an optical lens. The optical lens comprises a lens barrel and first to seventh lenses arranged in the lens barrel. The spacing element group at least comprises a first spacing element, a second spacing element and a third spacing element; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacing element and the spacing distance EP12 between the first spacing element and the second spacing element meet the following condition: f2 / (CP1 + EP12) is more than or equal to 19.39 and less than or equal to 31.5; the effective focal length f3 of the third lens, the spacing distance EP23 between the second spacing element and the third spacing element meet the condition that f3 / (EP2 + CT3) is larger than or equal to-23.63 and smaller than or equal to-11.26, and the central thickness CT3 of the third lens on the optical axis meets the condition that f3 / (EP2 + CT3) is smaller than or equal to-11.26. According to the utility model, the problem that stray light is easy to generate when the assembling stability of the front-end lens is improved in the prior art 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 more and more electronic equipment having the function of taking pictures, with the continuous updating iteration of mobile electronic equipment, also promote the continuous iteration and upgrading of optical lens. With the continuous increase of electronic equipment memory and the extreme pursuit of people to the quality of taking pictures, high definition and high picture cleanliness become the strong demand of terminal use customer, but the requirement of high pixel, large image plane promotes the lens piece number of optical lens more and more, the mechanism and component for bearing and installing more and more, the component that can produce stray light also more and more. For the optical lens composed of multiple lenses, the front end and rear end assembly stability of optical lens is crucial to the whole optical system. In part of the lens, in order to improve the assembly stability of the front end lens of optical lens, stray light is easy to produce.

[0003] That is, the prior art optical lens has the problem of producing stray light when improving the assembly stability of the front lens. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to provide an optical lens to solve the problem of producing stray light when improving the assembly stability of the front lens in the prior art optical lens.

[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, the lens group comprises a first lens, a second lens with positive focal length, a third lens with negative focal length, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence along the optical axis direction from the object side to the image side; the spacer element group comprises at least a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and contacts the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side surface of the second lens, and the third spacer element is located between the third lens and the fourth lens and contacts the image side surface of the third lens; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element and the interval distance EP12 between the first spacer element and the second spacer element satisfy: 19.39≤f2 / (CP1+EP12)≤31.5; the effective focal length f3 of the third lens, the interval distance EP23 between the second spacer element and the third spacer element and the central thickness CT3 of the third lens on the optical axis satisfy: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0006] According to another aspect of the utility model, an optical lens is provided, including lens barrel and lens group and spacer element group set in lens barrel, the lens group is composed of seven lenses, the lens group includes first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens along the optical axis direction in proper order from object side to image side, the spacer element group includes at least fifth spacer element, the fifth spacer element is located between fifth lens and sixth lens and is contacted with the image side part of fifth lens, the fifth spacer element is located between fifth lens and sixth lens and is contacted with the image side part of fifth lens, the effective focal length f5 of fifth lens, the central thickness CT5 of fifth lens on the optical axis, the maximum thickness CP5 of fifth spacer element satisfy: 33.27 = f5 / (CT5+CP5) = 255.07, the curvature radius R11 of the object side surface of sixth lens, the outer diameter D5m of the image side surface of fifth spacer element, the inner diameter d5m of the image side surface of fifth spacer element satisfy: 0.9 = R11 / (D5m-d5m) = 3.43.

[0007] According to another aspect of the utility model, an optical lens is provided, including lens barrel and lens group and spacer element group set in lens barrel, the lens group is composed of seven lenses, the lens group includes first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens along the optical axis direction in proper order from object side to image side, the spacer element group includes at least third spacer element and fourth spacer element, the third spacer element is located between third lens and fourth lens and is contacted with the image side part of third lens, the fourth spacer element is located between fourth lens and fifth lens and is contacted with the image side part of fourth lens, the interval distance EP34 between third spacer element and fourth spacer element, the effective focal length f4 of fourth lens, the air interval T45 of fourth lens and fifth lens on the optical axis satisfy: 33.2 = |f4| / (EP34+T45) = 118.76, the curvature radius R8 of the image side surface of fourth lens, the refractive index N4 of fourth lens, the inner diameter d4s of the object side surface of fourth spacer element satisfy: 4.66 = R8*N4 / d4s = 9.89.

[0008] Further, the first lens has positive refractive power, the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element, the effective focal length f1 of the first lens, and the central thickness CT1 of the first lens on the optical axis satisfy: 5.19 = f1 / (EP01+CT1) = 11.76.

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

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

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

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

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

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

[0015] Further, the spacer element group further comprises a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens, the interval distance EP34 between the third spacer element and the fourth spacer element, the effective focal length f4 of the fourth lens, the air interval T45 of the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76.

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

[0017] Further, the spacer element group further includes a fourth spacer element and a fifth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side surface portion of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image side surface portion of the fifth lens, a separation distance EP45 between the fourth spacer element and the fifth spacer element, a central thickness CT5 of the fifth lens on the optical axis, an air separation T56 of the fifth lens and the sixth lens on the optical axis satisfy: 1.58 ≤ (CT5 + T56) / EP45 ≤ 4.34.

[0018] Further, the fifth lens has positive refractive power, 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 contacts the image side surface portion of the fifth lens, an effective focal length f5 of the fifth lens, a central thickness CT5 of the fifth lens on the optical axis, a maximum thickness CP5 of the fifth spacer element satisfy: 33.27 ≤ f5 / (CT5 + CP5) ≤ 255.07.

[0019] Further, the object side surface of the sixth lens is a convex surface, 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 contacts the image side surface portion of the fifth lens, a curvature radius R11 of the object side surface of the sixth lens, an outer diameter D5m of the image side surface of the fifth spacer element, an inner diameter d5m of the image side surface of the fifth spacer element satisfy: 0.9 ≤ R11 / (D5m - d5m) ≤ 3.43.

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

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

[0022] Further, the object side surface of the seventh lens is a convex surface, the spacer element group 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, and the following conditions are met between the radius of curvature R13 of the object side surface of the seventh lens, the inner diameter d6m of the image side surface of the sixth spacer element, and the outer diameter D6m of the image side surface of the sixth spacer element: 0.97≤R13 / (D6m-d6m)≤1.82.

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

[0024] The technical scheme of the utility model is applied to an optical lens comprising 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 sequence along the optical axis direction from the object side to the image side, a first lens, a second lens with positive focal power, a third lens with negative focal power, a fourth lens, a fifth lens, a sixth lens and a seventh lens; the spacer element group comprises at least a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens; the following conditions are met between the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element and the interval distance EP12 between the first spacer element and the second spacer element: 19.39≤f2 / (CP1+EP12)≤31.5; the following conditions are met between the effective focal length f3 of the third lens and the interval distance EP23 between the second spacer element and the third spacer element: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0025] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and when 19.39≤f2 / (CP1+EP12)≤31.5 is satisfied between the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element and the interval distance EP12 between the first spacer element and the second spacer element, the convergence ability of the lens close to the object side is ensured, so that the light rays can smoothly enter the optical system behind, and meanwhile the bearing force of the first spacer element on the first spacer element and the second spacer element and the edge structure strength of the second lens are ensured, and the assembly stability of the optical lens at the first lens and the second lens is improved. Since the effective focal length of the second lens is relatively large with respect to the distance from the object side surface of the first spacer element to the object side surface of the second spacer element, the convergence ability of the second lens for the edge light rays is poor, which causes part of the edge light rays emitted by the second lens to be directed to the optical structure area of the third lens, forming stray light and affecting the imaging quality. In order to reduce the generation of such stray light, the present application restricts f3 / (EP23+CT3) in a reasonable range to adjust the deflection angle of the light rays when passing through the third lens, intercepts the invalid light path of the reflected light rays on the third lens and the optical elements located on the object side of the third lens, reduces the stray light and improves the imaging quality, which is beneficial to improve the optical performance. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application. The use of the same reference numerals in different drawings indicates similar or identical components.

[0027] Figure 1 A size marking diagram of the optical lens of one optional embodiment of the present application is shown;

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

[0029] Figure 3 A structure schematic diagram of the optical lens of embodiment 1-2 of the present application is shown;

[0030] Figures 4 to 6 The on-axis chromatic aberration, astigmatism curve and distortion curve of the optical lens of the embodiment one of the present application are shown respectively;

[0031] Figure 7 A structure schematic diagram of the optical lens of embodiment 2-1 of the present application is shown;

[0032] Figure 8 A structure schematic diagram of the optical lens of embodiment 2-2 of the present application is shown;

[0033] Figures 9 to 11The on-axis chromatic aberration, astigmatism curves, and distortion curves of the optical lens of Embodiment 2 of this utility model are shown respectively.

[0034] Figure 12 A schematic diagram of the structure of the optical lens of Embodiment 3-1 of this utility model is shown;

[0035] Figure 13 A schematic diagram of the optical lens structure of Embodiment 3-2 of this utility model is shown;

[0036] Figures 14 to 16 The on-axis chromatic aberration, astigmatism curves, and distortion curves of the optical lens of Embodiment 3 of this utility model are shown respectively.

[0037] Figure 17 A schematic diagram of the optical lens of Embodiment 4-1 of this utility model is shown;

[0038] Figure 18 A schematic diagram of the optical lens of Embodiment 4-2 of this utility model is shown;

[0039] Figures 19 to 21 The on-axis chromatic aberration, astigmatism curves, and distortion curves of the optical lens of Embodiment 4 of this utility model are shown respectively.

[0040] Figure 22 A stray light pattern of an optical lens according to an optional embodiment of the present invention is shown;

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

[0042] Figure 24 It shows Figure 23 Stray light pattern of a medium optical lens;

[0043] Figure 25 A stray light path diagram of an optical lens in another example is shown;

[0044] Figure 26 It shows Figure 25 A stray light pattern on a medium optical lens.

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

[0046] P0, lens barrel; 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; 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 DESCRIPTION

[0047] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0048] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0049] In the present application, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; 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 present application.

[0050] It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, 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.

[0051] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of explanation. 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 drawn strictly to scale.

[0052] 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 the person 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) positive and negative judgment of convex and concave. In terms of 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 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 this application, the left side is the object side and the right side is the image side.

[0053] In order to solve the problem of stray light in the prior art when improving the stability of the front lens group, the utility model provides an optical lens.

[0054] As shown in Figures 22 to 26 The optical lens includes 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 sequentially includes a first lens, a second lens with positive focal power, a third lens with negative focal power, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the optical axis direction from the object side to the image side; the spacer element group at least includes a first spacer element, a second spacer element and a third spacer element, the first spacer element is located between the first lens and the second lens and contacts the image side surface part of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side surface part of the second lens, and the third spacer element is located between the third lens and the fourth lens and contacts the image side surface part of the third lens; the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the interval distance EP12 between the first spacer element and the second spacer element satisfy: 19.39≤f2 / (CP1+EP12)≤31.5; the effective focal length f3 of the third lens, the interval distance EP23 between the second spacer element and the third spacer element, and the central thickness CT3 of the third lens on the optical axis satisfy: -23.63≤f3 / (EP23+CT3)≤-11.26.

[0055] The optical lens of the present application is composed of a lens barrel, seven lenses and at least one spacer element, and when 19.39≤f2 / (CP1+EP12)≤31.5 is satisfied between the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element and the interval distance EP12 between the first spacer element and the second spacer element, the convergence ability of the lens close to the object side is ensured to make the light rays smoothly incident to the optical system behind, while the bearing force of the first spacer element on the first spacer element and the second spacer element and the edge structure strength of the second lens are ensured, and the assembly stability of the optical lens at the first lens and the second lens is improved. Since the effective focal length of the second lens is relatively large with respect to the distance from the object side of the first spacer element to the object side of the second spacer element, the convergence ability of the second lens for the edge light rays is poor, which causes part of the edge light rays emitted by the second lens to be incident to the optical structure region of the third lens, forming stray light and affecting the imaging quality. In order to reduce the generation of such stray light, the present application restricts f3 / (EP23+CT3) within a reasonable range to adjust the deflection angle of the light rays passing through the third lens, intercepts the invalid light path of the reflected light rays on the third lens and the optical elements located on the object side of the third lens, reduces the stray light and improves the imaging quality, which is beneficial to improve the optical performance.

[0056] In addition, the light rays first pass through the converging action of the second lens, which is beneficial to the edge light rays entering the third lens, and under the diffusing action of the third lens, it is beneficial to improve the matching degree of the edge field of view CRA of the optical lens and the chip CRA, and reduce the risk of color deviation. The second lens and the third lens have opposite optical powers, which correct the chromatic aberration between the negative lens and the positive lens, and improve the imaging quality. At the same time, by limiting f2 / (CP1+EP12) and f3 / (EP23+CT3) within a reasonable range, the structure strength of the second lens and the third lens can be ensured, and the stability of the front end assembly of the optical lens is further improved. At the same time, the mutual constraint between the sizes of the second lens, the third lens, the first spacer element, the second spacer element and the third spacer element is beneficial to eliminate the defocus, chromatic aberration and distortion, and further reduce the stray light inside the lens and the feather stray light generated on the inner diameter surface of the first spacer element, and improve the imaging quality.

[0057] In addition, referring to Table 1 and Figure 1 shown below, Figure 1 the spot diagram of the optical lens satisfying f2 / (CP1+EP12)=28.92 and f3 / (EP23+CT3)=-15.61 is shown. Figures 2 to 6 the partial light path schematic diagram of the optical lens satisfying f2 / (CP1+EP12)=28.92 and f3 / (EP23+CT3)=-25 is shown, Figure 2 the stray light spot diagram of the optical lens in Figure 3 is shown. Figure 2Fig. 2 shows a partial optical path schematic diagram of the optical lens when f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-9, Figure 3 Fig. 3 shows a stray light spot diagram of the optical lens. Figure 2 Fig. 4 shows a stray light spot diagram of the optical lens.

[0058] Fig. 5 shows a stray light spot diagram of the optical lens. Figure 3 As shown in Fig. 5, when the optical lens satisfies f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-15.61, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical lens satisfies f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-25, the stray light energy is strong, the stray light has a greater impact on the imaging quality, and the performance is poor. When the optical lens satisfies f2 / (CP1+EP12)=28.92, f3 / (EP23+CT3)=-9, the stray light energy is strong, the stray light has a greater impact on the imaging quality, and the performance is poor. As can be seen, when f3 / (EP23+CT3) is in the range of -23.63 to -11.26, the stray light improvement effect of the optical lens is better. Therefore, by limiting -23.63≤f3 / (EP23+CT3)≤-11.26, the present application intercepts the invalid light path reflected on the third lens and the optical element located on the object side of the third lens, reduces the stray light, and improves the imaging quality.

[0059]

[0060] Table 1

[0061] It should be noted that the present application limits f3 / (EP23+CT3) to a reasonable range, the relationship between the second spacer element, the third spacer element and the third lens, in order to improve the stray light generated at the third lens, to solve the problem of stray light when f2 / (CP1+EP12) is in the range of 19.39 to 31.5, when f3 / (EP23+CT3) satisfies the above range, the purpose of improving the stray light can be achieved, and it does not depend on the focal power of the lens and the surface shape of the lens. The focal power and surface shape of the lens are further optimized on the basis of the optical lens. In addition to the second lens and the third lens, other lenses 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. When the optical system satisfies 19.39≤f2 / (CP1+EP12)≤31.5; -23.63≤f3 / (EP23+CT3)≤-11.26, the optical lens can improve the assembly stability while reducing the influence of stray light.

[0062] 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 beneficial to converge the large-angle light into the optical lens, and it is beneficial to improve the luminous flux. 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 beneficial to converge the light when passing through the fifth lens, so as to adapt to the chip at the imaging surface. For another example, in some optional embodiments, the sixth lens has positive refractive power, by constraining the sixth lens to have positive refractive power, it is beneficial to converge the light when passing through the sixth lens, so as to adapt to the chip at the imaging surface. For another example, in some optional embodiments, the seventh lens has negative refractive power, by constraining the seventh lens to have negative refractive power, it is beneficial to properly diverge the light 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 object side surface of the third lens is convex, the image side surface of the third lens is concave; 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 sixth lens is convex, the image side surface of the sixth lens is concave; the object side surface of the seventh lens is convex, the image side surface of the seventh lens is concave. By reasonably constraining the surface shape of each lens, it is beneficial to reasonably constrain the light path, ensure smooth transition of the light, and correct 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 appropriately adjusted.

[0063] In some optional embodiments, the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element, the effective focal length f1 of the first lens, and the central thickness CT1 of the first lens on the optical axis satisfy: 5.19≤f1 / (EP01+CT1)≤11.76. By constraining f1 / (EP01+CT1) within a reasonable range, the degree of deflection of the light within the first lens can be constrained, the edge thickness and the central thickness of the first lens can be ensured within a reasonable range while ensuring the structural strength of the front end of the lens barrel, and by constraining the effective focal length of the first lens, the central thickness of the first lens on the optical axis, and the distance between the object side end surface of the lens barrel and the object side surface of the first spacer element, the molding difficulty of the first lens can be ensured, the risk of weld lines during molding of the first lens can be reduced, the risk of stray light caused by the weld lines can be reduced, and the cleanliness of the imaging of the optical lens can be improved.

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

[0065] In some optional embodiments, the following relationship is met among the central thickness CT1 of the first lens on the optical axis, and the separation distance EP12 between the first spacer element and the second spacer element: 1.05≤CT1 / EP12≤1.64. By constraining CT1 / EP12 within a reasonable range, the central thickness of the first lens and the edge thickness of the second lens can be effectively controlled, which is conducive to improving the machinability of the first lens and the second lens, avoiding the generation of welding marks, thereby reducing the risk of stray light caused by welding marks, and improving the cleanliness of optical lens imaging. In addition, constraining the separation distance between the first spacer element and the second spacer element is conducive to improving the stability of the second lens against the first spacer element and the second spacer element, and is also conducive to improving the assembly stability.

[0066] In some optional embodiments, the following relationship is met among the air separation T23 of the second lens and the third lens on the optical axis, the air separation T34 of the third lens and the fourth lens on the optical axis, and the separation distance EP23 between the second spacer element and the third spacer element: 0.88≤(T34+T23) / EP23≤1.48. By constraining (T34+T23) / EP23 within a reasonable range, the air separation between the second lens and the fourth lens can be controlled within a reasonable range, the stability of the air separation between adjacent two lenses among the second lens to the fourth lens can be improved, the sensitivity of the optical lens caused by the change of the air separation can be reduced, while the separation distance between the second spacer element and the third spacer element is ensured, which is conducive to improving the edge structure strength of the third lens, further improving the assembly stability and consistency of the optical lens, and more conducive to adjusting the field curvature and improving the performance of the optical lens.

[0067] In some optional embodiments, the following relationship is met among the radius of curvature R2 of the image side surface of the first lens, the radius of curvature R3 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first spacer element: 2.35≤(R2+R3) / d1s≤3.04. By restricting (R2+R3) / d1s within a reasonable range, the degree of deflection of light rays passing through the image side surface of the first lens and the object side surface of the second lens is controlled, and the inner diameter of the object side surface of the first spacer element is controlled, which facilitates smooth passage of imaging light rays exiting the first lens through the first spacer element, and the first spacer element can also effectively block stray light generated by the first lens and the second lens, thereby avoiding the generation of stray light and improving imaging quality. In addition, controlling the radius of curvature of the image side surface of the first lens and the radius of curvature of the object side surface of the second lens can also improve the processability of the first lens and the second lens, reduce surface profile deviation, distortion, and appearance problems caused by molding, and facilitate improvement of the production yield of the first lens and the second lens.

[0068] In some optional embodiments, the following relationship is met among the radius of curvature R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacer element: 8.7≤R5 / d2m≤37.33. By restricting R5 / d2m within a reasonable range, the inner diameter of the image side surface of the second spacer element can block stray light from entering the third lens, and the degree of convergence of the object side surface of the third lens to light rays entering the third lens can also be controlled, which facilitates reduction of the generation of stray light and improvement of imaging quality. In addition, the processability of the third lens can also be improved, surface profile deviation, distortion, and appearance problems caused by molding can be reduced, and the production yield of the third lens can be improved.

[0069] In some optional embodiments, the following relationship is met among the radius of curvature R6 of the image side surface of the third lens and the outer diameter D3s of the object side surface of the third spacer element: 1.02≤R6 / D3s≤1.93. By restricting R6 / D3s within a reasonable range, the relevant aperture of the lens barrel at the position of the object side surface of the third spacer element can be effectively controlled, which facilitates consideration of the characteristics of miniaturization of the optical lens while controlling the exit angle of light rays from the third lens, facilitates reduction of the generation of stray light, and also improves the processability of the third lens, reduces surface profile deviation, distortion, and appearance problems caused by molding, and improves the production yield of the third lens.

[0070] In some optional embodiments, the set of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image-side surface portion of the fourth lens, and a spacing distance EP34 between the third spacer element and the fourth spacer element, an effective focal length f4 of the fourth lens, and an air spacing T45 of the fourth lens and the fifth lens on the optical axis satisfy: 33.2≤|f4| / (EP34+T45)≤118.76. By constraining |f4| / (EP34+T45) in a reasonable range, the degree of deflection of light rays by the fourth lens is ensured while the edge thickness of the fourth lens is constrained, which is conducive to reducing the machining angle of the radius of curvature of the fourth lens and facilitating the molding of the fourth lens. At the same time, the edge structural strength of the fourth lens is ensured, the sensitivity of the optical lens to air spacing is reduced, the stability of the optical performance is improved, and interference between the fourth lens and the fifth lens caused by manufacturing tolerances during assembly can be effectively avoided.

[0071] In some optional embodiments, the set of spacer elements further includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image-side surface portion of the fourth lens, and a radius of curvature R8 of the image-side surface of the fourth lens and an outer diameter D4m of the image-side surface of the fourth spacer element satisfy: 1.67≤R8 / D4m≤3.83. By constraining R8 / D4m in a reasonable range, the degree of deflection of light rays when exiting the fourth lens is ensured, while the fourth spacer element can absorb stray light generated by the fourth lens, reducing the generation of stray light while controlling the imaging light transmission path, improving imaging clarity, and the image-side surface of the fourth lens has a diverging effect on light rays, which is conducive to improving the matching degree of the edge field of view CRA and the chip CRA of the optical lens and reducing the risk of color deviation. In addition, the inner diameter size of the lens barrel at the position of the fourth spacer element can be controlled to ensure the outer diameter range of the fourth spacer element and the lenses before and after the fourth spacer element, which is conducive to the overall design of the optical lens.

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

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

[0074] In some optional embodiments, the set of spacer elements 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 radius of curvature R11 of the object-side surface of the sixth lens, an outer diameter D5m of the image-side surface of the fifth spacer element, and an inner diameter d5m of the image-side surface of the fifth spacer element satisfy: 0.9≤R11 / (D5m-d5m)≤3.43. By restricting R11 / (D5m-d5m) within a reasonable range, the range of light rays intercepted by the fifth spacer element and the angle at which the object-side surface of the sixth lens receives light rays can be guaranteed, which can effectively improve the light interception efficiency of the fifth spacer element while ensuring that the imaging light rays smoothly pass through the fifth spacer element into the sixth lens, and can also guarantee that the bearing area of the fifth spacer element is conducive to improving the assembly stability of the optical lens. In addition, by controlling the inner diameter and the outer diameter of the image-side surface of the fifth spacer element, the problems of baking deformation and assembly eccentricity of the fifth spacer element can be greatly reduced, light leakage and stray light caused by deformation and assembly eccentricity of the fifth spacer element can be reduced, and the smoothness and easy formability of the effective surface of the sixth lens can be improved, which is conducive to improving the imaging quality.

[0075] In some optional embodiments, the set of spacer elements 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 in contact with the image-side surface portion 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 portion of the sixth lens, and an effective focal length f6 of the sixth lens and a separation distance EP56 between the fifth spacer element and the sixth spacer element satisfy: 8.85≤f6 / EP56≤21.88. By restricting f6 / EP56 within a reasonable range, the chromatic aberration of the sixth lens can be reduced, the pixel of the optical lens can be improved, and the edge thickness and the effective focal length of the sixth lens can be restricted, which is conducive to balancing the rear focal length of the optical lens, ensuring that the light rays can reach a relatively stable imaging focal plane position after passing through the rear optical system, and making the imaging quality of the optical lens stable during use.

[0076] In some optional embodiments, the set of spacer elements 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 the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 of the sixth lens and the seventh lens on the optical axis satisfy: -12.64 ≤ f7 / (CP6+T67) ≤ -4.56. By restricting f7 / (CP6+T67) within a reasonable range, the spacing between the sixth lens and the seventh lens can be guaranteed, the impact of the tolerances of the sixth lens and the seventh lens can be reduced, while the stability of the abutment of the sixth spacer element to the sixth lens and the seventh lens is guaranteed, the sixth spacer element is prevented from deforming significantly after assembly and during baking, the structural stability of the sixth spacer element is guaranteed, which is conducive to guaranteeing its light-blocking effect and reducing stray light. At the same time, the degree of diffusion of light by the seventh lens is controlled, which is conducive to improving the matching degree of the CRA of the optical lens and the CRA of the chip and guaranteeing the imaging quality.

[0077] In some optional embodiments, the set of spacer elements 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 the radius of curvature R13 of the object-side surface of the seventh lens, the inner diameter d6m of the image-side surface of the sixth spacer element, and the outer diameter D6m of the image-side surface of the sixth spacer element satisfy: 0.97 ≤ R13 / (D6m-d6m) ≤ 1.82. By restricting R13 / (D6m-d6m) within a reasonable range, the angle of light entering the object-side surface of the seventh lens can be guaranteed, so that the imaging light passes smoothly through the sixth spacer element and is incident on the seventh lens, while the sixth spacer element absorbs stray light, improving the imaging quality. The abutment width of the image-side surface of the sixth spacer element can also be guaranteed, reducing the risk of deformation of the sixth spacer element during assembly and baking, improving the assembly stability, and also avoiding stray light caused by deformation of the sixth spacer element. The radius of curvature of the object-side surface of the seventh lens is controlled, which can improve the machinability of the seventh lens, reduce the surface deviation, distortion, and appearance problems caused by molding, and improve the production yield of the seventh lens.

[0078] In some alternative embodiments, the optical lens comprises a lens barrel, and a lens group and a spacer element group disposed in the lens barrel, the lens group consists of seven lenses, the lens group comprises, 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 comprises at least a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and is in contact with the image side surface portion of the fifth lens; the fifth spacer element is located between the fifth lens and the sixth lens and is in contact with the image side surface portion of the fifth lens, the effective focal length f5 of the fifth lens, the central thickness CT5 of the fifth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer element satisfy: 33.27≤f5 / (CT5+CP5)≤255.07; the radius of curvature R11 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 0.9≤R11 / (D5m-d5m)≤3.43.

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

[0080] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be repeated here.

[0081] In some alternative embodiments, the optical lens comprises a lens barrel, a lens set and a spacer element set arranged in the lens barrel, the lens set comprises seven lenses, the lens set comprises, 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 set 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 is in contact with the image side surface portion of the third lens, 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 distance between the third spacer element and the fourth spacer element is EP34, the effective focal length of the fourth lens is f4, and the air separation between the fourth lens and the fifth lens on the optical axis is T45, which satisfy: 33.2≤|f4| / (EP34+T45)≤118.76; the curvature radius of the image side surface of the fourth lens is R8, the refractive index of the fourth lens is N4, and the inner diameter of the object side surface of the fourth spacer element is d4s, which satisfy: 4.66≤R8*N4 / d4s≤9.89.

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

[0083] Of course, other parameter formulas in the above embodiments can also be included in the present embodiment, which will not be described here.

[0084] In some optional embodiments, the plurality of lenses described above can have at least one cut lens, the outer circumferential surface of the cut lens can have a cut portion and a non-cut portion, and the outer diameter of the cut portion of the lens is smaller than the outer diameter of the non-cut portion of the lens. When the outer circumferential surface of the lens has a cut portion, the outer diameter of the lens generally refers to the outer diameter of the non-cut portion of the lens.

[0085] In some optional embodiments, the plurality of spacing elements described above can have at least one cut spacing element. The outer circumferential surface of the cut spacing element can have a cut portion and a non-cut portion, and the outer diameter of the cut portion of the cut spacing element is smaller than the outer diameter of the non-cut portion of the cut spacing element. The outer diameter of the spacing element generally refers to the maximum outer diameter that is not cut by the cut portion.

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

[0087] It should be noted that each lens is composed of a central optical effective diameter area and an edge structure area, the edge structure area is located on the outer circumferential side of the central optical effective area and is arranged circumferentially around the central optical effective diameter area. The central optical effective diameter area is used for the passing of imaging light, and the edge structure area 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 spacing element. The edge structure area is also referred to as a non-effective diameter area.

[0088] The optical lens in the present application can adopt a plurality of lenses, for example, seven lenses as described above. In the present application, at least one of the lens surfaces of each lens is a non-spherical lens 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, has the advantages of improving distortion aberration and improving 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.

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

[0090] Figure 4 The size annotation diagram of one optical lens of the present application is shown, Figure 5The parameters d1s, D1s, d2m, D3s, D4m, d5m, D5m, d6m, D6m, CP1, CP5, CP6, EP01, EP12, EP23, EP34, EP45, EP56, and the like are marked in the drawings to clearly and intuitively understand the meanings of the parameters. In order to facilitate the description of the optical lens and the surface shape of the specific lens, the parameters are no longer embodied in the drawings when the specific embodiments are described below.

[0091] The specific surface shape and parameters of the optical lens applicable to the above embodiments are further described below with reference to the drawings.

[0092] It should be noted that there are two examples, Example 1-1 and Example 1-2, in Embodiment One described below, there are two examples, Example 2-1 and Example 2-2, in Embodiment Two, there are two examples, Example 3-1 and Example 3-2, in Embodiment Three, and there are two examples, Example 4-1 and Example 4-2, in Embodiment Four. The curvature radii, center thicknesses, and the like of the first to seventh lenses of the optical lens in the two examples in the same embodiment are the same, but the thicknesses, inner diameters, and outer diameters of the barrel, the first spacer element, the second spacer element, the third spacer element, and the like are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0093] It should be noted that any of Embodiments One to Four described below is applicable to all embodiments of the present application.

[0094] Embodiment One

[0095] As shown in Figure 6 , an optical lens of Embodiment One is described. Figures 4 to 6 shows a structural schematic diagram of the optical lens of Example 1-1, Figures 7 to 11 shows a structural schematic diagram of the optical lens of Example 1-2.

[0096] As shown in Figure 7 and Figure 8 , the optical lens includes a barrel P0, seven lenses, and a plurality of spacer elements. The barrel P0 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, and a seventh lens.

[0097] As shown in Figure 7Fig. 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 S13 of the seventh lens, respectively. The image side S14 of the seventh lens is spaced apart from the lens barrel P0.

[0098] 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 mode of each spacer element is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to, which will not be described here. Figure 8

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

[0100] In 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 positive 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 negative refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. 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 concave. 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 concave. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave.

[0101] 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).

[0102]

[0103] ​

[0104] Table 2

[0105] 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:

[0106]

[0107] wherein x is the sag of the aspherical surface at a position along the optical axis at a height of h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the inverse of the curvature radius 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 term 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.

[0108]

[0109]

[0110] Table 3

[0111] Figure 7 The on-axis chromatic aberration curve of the optical lens of embodiment one is shown, which represents the deviation of the converging focus points of light rays of different wavelengths after passing through the optical lens. Figure 8 The astigmatism curve of the optical lens of embodiment one is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 9 The distortion curve of the optical lens of embodiment one is shown, which represents the distortion size values corresponding to different field angles.

[0112] According to Figure 10 It can be seen that the optical lens given in embodiment one can achieve good imaging quality.

[0113] Embodiment two

[0114] As Figure 11 shown, the optical lens of embodiment two is described. Figures 9 to 11 The structural schematic diagram of the optical lens of embodiment 2-1 is shown, Figures 12 to 16 The structural schematic diagram of the optical lens of embodiment 2-2 is shown.

[0115] As Figure 12 and Figure 13As shown, the optical lens includes a lens barrel P0, seven lenses, and multiple spacer elements. The lens barrel P0 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, and a seventh lens, arranged sequentially from the object side to the image side.

[0116] like Figure 12 The diagram shows a schematic of the optical lens structure of Embodiment 2-1. In this example, the object-side surface S1 of the first lens abuts against the lens barrel portion. The object-side surface and image-side surface of the first spacer element P1 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 image-side surface of the second spacer element P2 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 image-side surface of the third spacer element P3 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 image-side surface of the fourth spacer element P4 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 image-side surface of the fifth spacer element P5 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 image-side surface of the sixth spacer element P6 abut against the image-side surface S12 of the sixth lens and the object-side surface S13 of the seventh lens, respectively; and the image-side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0117] like Figure 13 The diagram shown is a structural schematic of the optical lens in Embodiment 2-2. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

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

[0119] 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 positive 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 negative refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. The fourth lens E4 has positive 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 concave. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave.

[0120] 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.

[0121]

[0122] Table 4

[0123] 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 profile can be defined by the formula (1) given in embodiment one above.

[0124]

[0125]

[0126] Table 5

[0127] Figure 12 The on-axis 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 13 The astigmatism curve of the optical lens of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Face number The distortion curve of the optical lens of embodiment two is shown, which represents the distortion size value corresponding to different field angles of view.

[0128] According to Face number It can be seen that the optical lens given in embodiment two can achieve good imaging quality.

[0129] Embodiment three

[0130] As Figure 14 shown, the optical lens of embodiment three is described. Figure 15 The structural schematic diagram of the optical lens of embodiment 3-1 is shown,Figure 16 A structural diagram of the optical lens of Example 3-2 is shown.

[0131] As shown in Figures 14 to 16 and Figures 17 to 21 , the optical lens includes a lens barrel P0, seven lenses, and a plurality of spacer elements, the lens barrel P0 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, and a seventh lens.

[0132] As shown in Figure 17 , a structural diagram of the optical lens of Example 3-1 is shown. In this example, the object side surface S1 of the first lens abuts against the lens barrel portion. 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 S13 of the seventh lens, respectively. The image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0133] As shown in Figure 18 , a structural diagram of the optical lens of Example 3-2 is shown. In this example, the abutting abutment modes of the spacer elements are the same as those of Example 3-1, and reference can be made to the related description in Example 3-1, which will not be repeated here.

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

[0135] In 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 positive 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 negative refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. 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 concave, 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 concave. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave.

[0136] 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.

[0137]

[0138]

[0139] Table 6

[0140] 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 profile can be defined by the formula (1) given in embodiment one above.

[0141] Figure 17 A4 A6 A8 A10 A12 A14 A16 S1 -7.4220E-03 -1.7936E-03 -1.0647E-03 -4.7391E-04 -1.6837E-04 -6.1597E-05 -1.9114E-05 S2 -6.7272E-02 -3.5397E-03 -7.6630E-04 -2.2670E-04 -5.3126E-05 -1.3854E-05 -5.0406E-06 S3 -1.1069E-01 9.0025E-03 2.1046E-03 -2.7484E-04 -3.7925E-05 1.6481E-05 -1.3099E-05 S4 -5.8593E-02 1.6716E-02 2.9987E-04 -7.3912E-04 -1.8976E-04 -1.4495E-04 -9.5076E-05 S5 -1.0909E-02 -1.6785E-03 -2.2598E-03 -4.0090E-04 -2.8971E-04 -1.8579E-04 -1.1063E-04 S6 2.0224E-02 -5.8500E-03 7.2032E-04 1.3554E-04 -4.0886E-04 -1.4069E-04 6.3559E-07 S7 -2.8279E-01 -1.6980E-02 -4.6746E-04 -6.4671E-04 -1.9329E-03 -1.7006E-03 -1.1359E-03 S8 -3.4785E-01 1.6565E-02 6.5356E-03 6.6625E-05 -2.3898E-03 -1.0679E-03 -2.5845E-04 S9 -1.0096E-01 8.1166E-02 -2.2269E-02 -1.6211E-03 -6.2805E-04 -9.2161E-05 -7.4936E-04 S10 -5.0185E-01 1.7877E-01 -2.3366E-02 -9.9335E-03 -1.4158E-03 3.3825E-05 -5.3864E-04 S11 -1.4206E+00 1.2775E-02 6.2565E-02 -1.0733E-02 -5.0424E-03 -7.6931E-05 1.0901E-03 S12 -4.4882E-01 -2.2501E-02 1.0958E-01 -5.9051E-02 1.9419E-03 7.0265E-03 -5.8597E-04 S13 -3.0898E+00 9.9958E-01 -3.7207E-01 9.8862E-02 -1.6221E-02 7.0391E-03 -5.7008E-03 S14 -6.6303E+00 1.2914E+00 -5.2191E-01 1.4720E-01 -7.5954E-02 1.8284E-02 -1.7842E-02 Figure 18 A18 A20 A22 A24 A26 A28 A30 S1 -9.7446E-06 -1.1367E-06 2.6639E-07 -7.7096E-07 1.7422E-07 -1.3922E-07 1.3826E-07 S2 -3.5618E-06 -1.4659E-06 -6.3667E-07 1.8411E-07 -3.2155E-07 6.9392E-10 9.8222E-08 S3 -7.4179E-06 5.4497E-07 2.2791E-06 -6.3815E-07 -7.4086E-07 1.2199E-07 7.4134E-07 S4 -3.5785E-05 -3.7670E-06 2.5745E-06 1.2069E-06 1.3099E-06 1.2014E-06 1.3695E-06 S5 -3.0603E-05 -1.0593E-05 3.0838E-06 -3.3966E-06 1.7255E-07 -1.3942E-06 1.7126E-06 S6 4.6882E-05 3.4451E-05 1.4349E-05 -1.1015E-07 -3.4364E-08 1.1172E-06 -4.8219E-07 S7 -6.7484E-04 -3.6168E-04 -2.0936E-04 -1.1674E-04 -5.5732E-05 -2.5551E-05 -7.6744E-06 S8 6.3074E-05 1.4825E-04 6.9226E-05 4.0074E-05 2.0475E-05 6.4154E-06 2.2720E-06 S9 -3.0278E-05 1.9415E-05 -6.6536E-05 -4.9666E-06 1.2754E-05 -1.5054E-05 5.1937E-06 S10 -6.1621E-04 1.3493E-04 2.0113E-05 3.7814E-06 -3.4356E-05 3.4241E-05 -6.5644E-06 S11 -3.7400E-04 1.5789E-04 -4.7512E-05 8.6082E-05 -4.9846E-05 9.2755E-06 -3.5952E-07 S12 -1.3492E-03 -9.5679E-05 2.4807E-04 1.8429E-04 -1.1195E-04 2.4662E-06 3.7699E-06 S13 1.2893E-03 7.4032E-04 -6.0598E-04 1.9512E-04 -3.4316E-05 3.2495E-06 -1.3033E-07 S14 5.2474E-03 -5.1779E-03 -3.3945E-04 -1.1749E-03 -1.9563E-04 -4.1001E-04 0.0000E+00

[0142] Table 7

[0143] Figure 17 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 18 The astigmatism curve of the optical lens of embodiment three is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 19 The distortion curve of the optical lens of embodiment three is shown, which represents the distortion size value corresponding to different field angles of view.

[0144] According to Figure 20 It can be known that the optical lens given in embodiment three can achieve good imaging quality.

[0145] Embodiment four

[0146] As Figure 21 shown, the optical lens of embodiment four is described. Figures 19 to 21 The structural schematic diagram of the optical lens of embodiment 4-1 is shown,Conditional expression / Embodiment A structural diagram of the optical lens of embodiment 4-2 is shown.

[0147] As shown in f1 / (EP01+CT1) and D1s / (R1*N1) , the optical lens includes a lens barrel P0, seven lenses, and a plurality of spacer elements, the lens barrel P0 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, and a seventh lens.

[0148] As shown in f2 / (CP1+EP12) , a structural diagram of the optical lens of embodiment 4-1 is shown. In this example, the object side surface S1 of the first lens abuts against the lens barrel portion. 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 S13 of the seventh lens, respectively. The image side surface S14 of the seventh lens is spaced apart from the lens barrel P0.

[0149] As shown in CT1 / EP12 , a structural diagram of the optical lens of embodiment 4-2 is shown. In this example, the abutting abutment mode of each spacer element is the same as that of embodiment 4-1, and reference can be made to the related description in embodiment 4-1, which will not be repeated here.

[0150] In summary, the structural parameters of the optical lens of embodiment four in embodiments 4-1 and 4-2 are shown in Table 11.

[0151] 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 positive 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 negative refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is concave. 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 concave. The seventh lens E7 has negative refractive power, the object side S13 of the seventh lens is convex, and the image side S14 of the seventh lens is concave.

[0152] 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.

[0153]

[0154]

[0155] Table 8

[0156] The following table 9 gives the high order term coefficients of the aspheres S1-S14 that can be used in embodiment four. Wherein each aspherical surface type can be defined by the formula (1) given in embodiment one above.

[0157]

[0158]

[0159] Table 9

[0160] (T34+T23) / EP23 The axial 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. f3 / (EP23+CT3) The astigmatism curve of the optical lens of embodiment four is shown, which represents the meridional image surface curvature and sagittal image surface curvature. |f4| / (EP34+T45) The distortion curve of the optical lens of embodiment four is shown, which represents the distortion size values corresponding to different field angles.

[0161] According to f5 / (CT5+CP5) It can be seen that the optical lens given in embodiment four can achieve good imaging quality.

[0162] In summary, the optical lenses of embodiments one to four respectively satisfy the relationships shown in table 10.

[0163] f6 / EP56 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 (CT5+T56) / EP45 11.76 11.13 5.21 5.71 5.45 5.19 6.95 6.64 f7 / (CP6+T67) 1.43 1.19 1.53 1.32 1.46 1.20 2.02 1.34 (R2+R3) / d1s 19.39 20.41 25.99 24.88 31.50 28.92 30.22 26.76 R5 / d2m 1.05 1.10 1.61 1.55 1.56 1.43 1.64 1.43 R6 / D3s 0.93 0.93 0.88 0.90 1.38 1.48 1.16 1.40 R8 / D4m -11.26 -11.29 -12.66 -12.81 -14.96 -15.61 -21.01 -23.63 R11 / (D5m-d5m) 61.36 56.41 118.76 109.61 87.17 78.20 38.93 33.20 R13 / (D6m-d6m) 244.77 255.07 100.54 97.01 44.17 44.93 33.27 34.26 R8*N4 / d4s 17.05 15.82 19.35 21.88 8.85 9.11 20.75 18.93 ​ 1.58 1.65 2.32 2.72 4.34 3.63 2.61 2.95 ​ -5.26 -5.45 -8.49 -8.50 -12.64 -12.61 -4.65 -4.56 ​ 2.72 2.73 2.35 2.47 3.04 2.95 2.96 2.89 ​ 12.09 11.66 32.21 32.95 37.33 36.71 8.96 8.70 ​ 1.21 1.54 1.57 1.52 1.48 1.93 1.02 1.64 ​ 1.82 1.77 2.20 1.99 3.76 3.83 1.67 1.74 ​ 1.99 2.03 1.26 1.45 0.90 1.09 3.43 3.32 ​ 1.65 1.47 1.57 1.82 0.97 1.05 1.48 1.53 ​ 4.66 6.80 6.63 9.89 9.68 6.01 5.79 4.66

[0164] Table 10

[0165] Table 11 shows the partial parameters (in mm) of the optical lens of Embodiment 1 to Embodiment 4.

[0166]

[0167]

[0168] Table 11

[0169] 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 (CMOS). The imaging device can be a stand-alone 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.

[0170] Obviously, the above-described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0171] It is to be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it will be further understood that the terms "comprise" and / or "include" when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof.

[0172] It should 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 specific sequential or chronological order. It is to be understood that the use of these terms herein is merely for distinguishing between the similar objects and the use of these terms in the context of the present application is not a representation that the objects so distinguished are consecutive or chronologically prior to the other objects distinguished.

[0173] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical lens, characterized in that, It includes a lens barrel and a lens assembly and a spacer assembly disposed within the lens barrel. The lens group consists of seven lenses, which are sequentially included along the optical axis from the object side to the image side: a first lens, a second lens with positive optical power, a third lens with negative optical power, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The spacer element group includes at least a first spacer element, a second spacer element, and a third spacer element. The first spacer element is located between the first lens and the second lens and contacts the image-side side of the first lens. The second spacer element is located between the second lens and the third lens and contacts the image-side side of the second lens. The third spacer element is located between the third lens and the fourth lens and contacts the image-side side of the third lens. The effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the spacing EP12 between the first spacer element and the second spacer element satisfy the following condition: 19.39≤f2 / (CP1+EP12)≤31.5; The effective focal length f3 of the third lens, the spacing distance EP23 between the second spacer element and the third spacer element, and the center thickness CT3 of the third lens on the optical axis satisfy the following: -23.63≤f3 / (EP23+CT3)≤-11.

26.

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

76.

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

02.

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

64.

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

48.

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

04.

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

33.

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

93.

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

76.

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

83.

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

34.

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

07.

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

43.

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

88.

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

56.

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

82.

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

Images