Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel, a lens group and a spacing assembly, wherein the lens group and the spacing assembly are accommodated in the lens barrel; the lens group comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with negative focal power and a seventh lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis; the interval assembly comprises a fifth interval element which is arranged on the image side of the fifth lens and is in contact with the image side surface of the fifth lens, and a sixth interval element which is arranged on the image side of the sixth lens and is in contact with the image side surface of the sixth lens; the optical lens satisfies the following conditions: (f5 + f6) / T56 is more than-51.30 and less than-16.30, D5m / d5s is more than 2.75 and less than 3.85, and D6m / d6s is more than or equal to 2.25 and less than 3.40.

Description

Technical Field

[0001] This application relates to the field of optical device technology, and in particular to an optical lens. Background Technology

[0002] With the increasing demand for high-pixel counts and wide-angle lenses in fields such as smartphones, automotive cameras, and security monitoring, multi-lens combination designs have gradually become the industry mainstream. Traditional optical lenses typically employ a six- or seven-lens structure, correcting chromatic aberration by adjusting the combination of positive and negative lenses. However, due to limitations in compact design, the compatibility and matching relationship between the lens spacing and the spacer structure is particularly critical, especially when dealing with lenses with negative optical power. The accuracy of the air gap and optical power matching directly affects the lens image quality and the stability of the optical system. Furthermore, the stress during lens assembly is mainly concentrated at the lens edges, which can cause deformation of the spacer elements that are in contact with the lens edges. This issue not only significantly increases the structural design difficulty of the spacer elements but also introduces the risk of optical lens assembly deformation, potentially impacting overall optical performance. Summary of the Invention

[0003] One advantage of this application is that it provides an optical lens that can balance the contradiction between lens spacing and spacer structure in traditional optical lenses, and reduce the risk of spacer assembly deformation.

[0004] On one hand, this application provides an optical lens, including a lens barrel and a lens group and a spacer assembly housed within the lens barrel; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power; the spacer assembly includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, and a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens. The optical lens satisfies the following conditions: -51.30 < (f5 + f6) / T56 < -16.30; 2.75 < D5m / d5s < 3.85; and 2.25 ≤ D6m / d6s < 3.40; where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, T56 is the air gap between the fifth and sixth lenses on the optical axis, D5m is the outer diameter of the image-side surface of the fifth spacer element, d5s is the inner diameter of the object-side surface of the fifth spacer element, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6s is the inner diameter of the object-side surface of the sixth spacer element.

[0005] In some embodiments of this application, the image-side surface of the sixth spacer element is in contact with the object-side surface of the seventh lens, and the optical lens satisfies: 1.25≤(D6s-d6s) / d6s<2.40; where D6s is the outer diameter of the object-side surface of the sixth spacer element, and d6s is the inner diameter of the object-side surface of the sixth spacer element.

[0006] In some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 2.35 < (D4s - d4s) / d4s < 3.85; where D4s is the outer diameter of the object side surface of the fourth spacing element and d4s is the inner diameter of the object side surface of the fourth spacing element.

[0007] In some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.65≤EP56 / (CP5+EP45)<1.40; wherein EP56 is the spacing distance between the fifth spacing element and the sixth spacing element along the optical axis, CP5 is the maximum thickness of the fifth spacing element, and EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis.

[0008] In some embodiments of this application, the optical lens satisfies: 1.50≤d0m / (D6m-d6m)<2.35; where d0m is the inner diameter of the image-side surface of the lens barrel, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element.

[0009] In some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.85 < EP45 / CT5 ≤ 1.35; wherein EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis, and CT5 is the center thickness of the fifth lens.

[0010] In some embodiments of this application, the optical lens satisfies: 2.25 < EP56 / CT6 < 3.45; where EP56 is the distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0011] In some embodiments of this application, the spacing assembly further includes a third spacing element disposed on the image side of the third lens and in contact with the image side surface of the third lens, wherein the optical lens satisfies: 0.85≤EP34 / CT4<1.5; wherein EP34 is the spacing distance between the third spacing element and the fourth spacing element along the optical axis, and CT4 is the center thickness of the fourth lens.

[0012] In some embodiments of this application, the spacing assembly further includes a seventh spacing element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens, wherein the optical lens satisfies: 1.60 < (T67 + CT7) / EP67 < 2.45; where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, CT7 is the center thickness of the seventh lens, and EP67 is the spacing distance between the sixth spacing element and the seventh spacing element along the optical axis.

[0013] In some embodiments of this application, the spacer assembly further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, and a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens. The optical lens satisfies: 4.10 < CT2 / CT3 ≤ 4.60; and 4.95 < EP12 / (D2s-D1m) < 9.20; wherein CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, EP12 is the spacing distance between the first spacer element and the second spacer element along the optical axis, D2s is the outer diameter of the object side surface of the second spacer element, and D1m is the outer diameter of the image side surface of the first spacer element.

[0014] In some embodiments of this application, the spacer assembly further includes a first spacer element placed on the image side of the first lens and in contact with the image side of the first lens, a second spacer element placed on the image side of the second lens and in contact with the image side of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side of the third lens, and a fourth spacer element placed on the image side of the fourth lens and in contact with the image side of the fourth lens. The optical lens satisfies: 0.55 < EP12 / (EP01+EP23+EP34) ≤ 0.70; where EP12 is the spacing distance between the first spacer element and the second spacer element along the optical axis, EP01 is the distance from the object side of the lens barrel to the object side of the first spacer element along the optical axis, EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis, and EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis.

[0015] In summary, the optical lens in the above embodiments of this application is a seven-element wide-angle optical lens. The fifth lens has positive optical power, and the sixth lens has negative optical power. From the relationship satisfied by the focal lengths of the fifth and sixth lenses and the air gap on the axis of the fifth and sixth lenses, -51.30 < (f5 + f6) / T56 < -16.30, it can be seen that if the air gap between the fifth and sixth lenses is too small, the stress of the fifth and sixth lenses will be concentrated at the lens edges. The spacer element in contact with the fifth and sixth lenses will deform due to stress. By constraining the ratio of the outer diameter of the image side to the inner diameter of the object side of the fifth spacer element and the ratio of the outer diameter of the image side to the inner diameter of the object side of the sixth spacer element, the width of the positioning ring surface of the spacer element can be constrained, thereby constraining the size of the contact surface between the spacer element and the lens. This suppresses severe deformation of the fifth and sixth spacer elements during lens assembly and under high temperature conditions, reduces the risk of interference with the lens after deformation of the fifth and sixth spacer elements, and reduces the impact on image quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structural parameters of an optical lens according to one embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the structure of an optical lens according to one embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of an optical lens according to Embodiment 1 of this application;

[0019] Figure 4 This is a schematic diagram of the structure of an optical lens according to Embodiment 2 of this application;

[0020] Figure 5 This is a schematic diagram of the structure of an optical lens according to Embodiment 3 of this application;

[0021] Figure 6A A schematic diagram of the on-axis chromatic aberration curves of the optical lenses according to the above-described Embodiment 1, Embodiment 2 and Embodiment 3 of this application is shown;

[0022] Figure 6B A schematic diagram of the astigmatism curves of the optical lenses according to Embodiment 1, Embodiment 2 and Embodiment 3 of this application is shown.

[0023] Figure 7 This is a schematic diagram of the structure of an optical lens according to Embodiment 4 of this application;

[0024] Figure 8 This is a schematic diagram of the structure of an optical lens according to Embodiment 5 of this application;

[0025] Figure 9 This is a schematic diagram of the structure of an optical lens according to Embodiment Six of this application;

[0026] Figure 10A A schematic diagram of the on-axis chromatic aberration curves of the optical lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0027] Figure 10B A schematic diagram of the astigmatism curves of the optical lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0028] Figure 11 This is a schematic diagram of the structure of an optical lens according to Embodiment Seven of this application;

[0029] Figure 12 This is a schematic diagram of the structure of an optical lens according to Embodiment 8 of this application;

[0030] Figure 13 This is a schematic diagram of the structure of an optical lens according to Embodiment Nine of this application;

[0031] Figure 14A A schematic diagram of the on-axis chromatic aberration curves of the optical lenses of Embodiments 7, 8, and 9 according to this application is shown.

[0032] Figure 14B A schematic diagram of the astigmatism curves of the optical lenses according to Embodiments 7, 8 and 9 of this application is shown.

[0033] Figure 15 The combined deformation contour plots of the optical lens are shown respectively when (f5+f6) / T56=-42, D5m / d5s=2.6 and D6m / d6s=2.1;

[0034] Figure 16 The combined deformation contour plots of the optical lens are shown when (f5+f6) / T56=-42, D5m / d5s=3.7, and D6m / d6s=3.3, respectively.

[0035] Figure 17 The combined deformation contour plots of the optical lens are shown when (f5+f6) / T56=-42, D5m / d5s=4.0 and D6m / d6s=3.9 respectively.

[0036] Reference numerals: E1, first lens; E2, second lens; E3, third lens; E4, fourth lens; E5, fifth lens; E6, sixth lens; E7, seventh lens; P0, lens barrel; P1, first spacer element; P2, second spacer element; P3, third spacer element; P4, fourth spacer element; P5, fifth spacer element; P6, sixth spacer element; P7, seventh spacer element. Detailed Implementation

[0037] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0040] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, the surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. For the object-side surface, 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; for the image-side surface, 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.

[0041] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] According to one aspect of this application, such as Figure 1 As shown, this application provides an optical lens, including a lens barrel and a lens group and a spacer assembly housed within the lens barrel; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power; the spacer assembly includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, and a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens.

[0045] Specifically, the optical lens satisfies: -51.30 < (f5 + f6) / T56 < -16.30; 2.75 < D5m / d5s < 3.85; and 2.25 ≤ D6m / d6s < 3.40; where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, T56 is the air gap between the fifth and sixth lenses on the optical axis, D5m is the outer diameter of the image-side surface of the fifth spacer element, d5s is the inner diameter of the object-side surface of the fifth spacer element, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6s is the inner diameter of the object-side surface of the sixth spacer element.

[0046] It is worth noting that the optical lens in the above embodiments of this application is a seven-element wide-angle optical lens. The fifth lens has positive optical power and the sixth lens has negative optical power. From the relationship satisfied by the focal length of the fifth and sixth lenses and the air gap on the axis of the fifth and sixth lenses, -51.30 < (f5 + f6) / T56 < -16.30, it can be seen that if the air gap between the fifth and sixth lenses is too small, the stress of the fifth and sixth lenses will be concentrated at the lens edges. The spacer element in contact with the fifth and sixth lenses will deform due to stress. By constraining the ratio of the outer diameter of the image side to the inner diameter of the object side of the fifth spacer element and the ratio of the outer diameter of the image side to the inner diameter of the object side of the sixth spacer element, the width of the positioning ring surface of the spacer element can be constrained, thereby constraining the size of the contact surface between the spacer element and the lens. This suppresses the severe deformation of the fifth and sixth spacer elements during lens assembly and under high temperature conditions, reduces the risk of interference with the lens after the fifth and sixth spacer elements are deformed, and reduces the impact on image quality.

[0047] Furthermore, the first lens has negative optical power, and both its object-side and image-side surfaces are concave; the second lens has positive optical power, and its object-side and image-side surfaces are convex and concave, respectively; the third lens has positive optical power, and its object-side and image-side surfaces are concave and convex, respectively; the fourth lens has positive optical power, and both its object-side and image-side surfaces are convex; the fifth lens has positive optical power, and both its object-side and image-side surfaces are convex; the sixth lens has negative optical power, and its object-side and image-side surfaces are convex and concave, respectively; and the seventh lens has negative optical power, and its object-side and image-side surfaces are convex and concave, respectively.

[0048] For example, Figure 15 The combined deformation contours of the fifth and sixth lenses are shown when the optical lens satisfies (f5+f6) / T56=-42, D5m / d5s=2.6 and D6m / d6s=2.1, respectively. Figure 16The combined deformation contours of the fifth and sixth lenses are shown when the optical lens satisfies (f5+f6) / T56=-42, D5m / d5s=3.7 and D6m / d6s=3.3, respectively. Figure 17 The combined deformation contour plots of the fifth and sixth lenses are shown respectively when the optical lens satisfies (f5+f6) / T56=-42, D5m / d5s=4.0, and D6m / d6s=3.9; Figures 15 to 17 It can be seen that the deformation of the fifth and sixth spacer elements is as follows: the deformation of the spacer element towards the object side is positive, and the deformation of the spacer element towards the image side is negative. For example... Figure 15 As shown, when D5m / d5s = 2.6 and D6m / d6s = 2.1, the contact area between the spacer element and the lens is small. Under a 20N assembly force, the forces on the spacer element and lens are uneven. The edges of the fifth and sixth spacers, which are suspended near the optical axis, are prone to significant warping under pressure. The deformation of the fifth spacer element is 0.018mm, and that of the sixth spacer element is 0.016mm, which significantly affects the imaging quality of the optical lens. Figure 16 As shown, when D5m / d5s = 3.7 and D6m / d6s = 3.3, the lens and spacer elements are subjected to uniform force, and the edge warping of the fifth and sixth spacer elements is relatively small. The deformation of the fifth spacer element is 0.021mm, and the deformation of the sixth spacer element is 0.0001mm. The total deformation of the spacer elements is small, which has a small impact on the image quality of the optical lens. Figure 17 As shown, when D5m / d5s=4.0 and D6m / d6s=3.9, the fifth and sixth spacers are relatively wide, which can easily block the passage of effective light. In addition, the bearing surface of the spacers will be squeezed by the lens and the outer diameter edge of the spacers will be squeezed by the lens barrel. The inner and outer diameter edges of the fifth and sixth spacers may both produce large warping. The deformation of the fifth spacer is -0.01mm and the deformation of the sixth spacer is -0.01mm, which has a significant impact on the imaging quality of the optical imaging lens.

[0049] Preferably, the optical lens satisfies: -51.26≤(f5+f6) / T56≤-16.31; 2.79≤D5m / d5s≤3.82; and 2.25≤D6m / d6s≤3.39.

[0050] According to some embodiments of this application, the image-side surface of the sixth spacer element is in contact with the object-side surface of the seventh lens, and the optical lens satisfies: 1.25≤(D6s-d6s) / d6s<2.40; where D6s is the outer diameter of the object-side surface of the sixth spacer element, and d6s is the inner diameter of the object-side surface of the sixth spacer element.

[0051] In this way, the object-side surface of the sixth spacer element contacts the image-side surface of the sixth lens, and the image-side surface of the sixth spacer element contacts the object-side surface of the seventh lens. By controlling the ratio of the difference between the outer diameter and the inner diameter of the object-side surface of the sixth spacer element (D6s-d6s) to the inner diameter d6s of the object-side surface of the sixth spacer element to satisfy the above relationship, the size of the effective toroidal surface of the sixth spacer element can be constrained, ensuring that the sixth spacer element stably supports the sixth and seventh lenses in the optical system, thereby strengthening the structural strength and increasing the support stability.

[0052] Preferably, the optical lens satisfies: 1.25≤(D6s-d6s) / d6s≤2.39.

[0053] According to some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 2.35 < (D4s - d4s) / d4s < 3.85; where D4s is the outer diameter of the object side surface of the fourth spacing element and d4s is the inner diameter of the object side surface of the fourth spacing element.

[0054] In this way, by controlling the ratio of the difference between the outer diameter of the object side and the inner diameter of the object side of the fourth spacer element (D4s-d4s) to the inner diameter d4s of the object side of the fourth spacer element to satisfy the above relationship, the width and inner diameter of the toroidal surface of the fourth spacer element can be constrained, blocking excess light rays from the edge of the emitted fourth lens, suppressing stray light generation, and reducing stray light risk.

[0055] Preferably, the optical lens satisfies: 2.37≤(D4s-d4s) / d4s≤3.83.

[0056] According to some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.65≤EP56 / (CP5+EP45)<1.40; wherein EP56 is the spacing distance between the fifth spacing element and the sixth spacing element along the optical axis, CP5 is the maximum thickness of the fifth spacing element, and EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis.

[0057] In this way, by controlling the ratio of the spacing distance between the fifth and sixth spacers along the optical axis to the maximum thickness of the fifth spacer and the sum of the spacing distances between the fourth and fifth spacers along the optical axis, the maximum thickness of the fifth and sixth lens mechanisms and the maximum thickness of the inter-lens spacers can be constrained. This is beneficial to the bearing stability between the fifth and sixth lenses, thereby increasing the mechanical stability and assembly tolerance of the optical lens and avoiding performance degradation caused by excessive compactness or looseness.

[0058] Preferably, the optical lens satisfies: 0.65≤EP56 / (CP5+EP45)≤1.36.

[0059] According to some embodiments of this application, the optical lens satisfies: 1.50≤d0m / (D6m-d6m)<2.35; where d0m is the inner diameter of the image-side surface of the lens barrel, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element.

[0060] In this way, by limiting the ratio of the inner diameter d0m of the image side of the lens barrel to the difference (D6m-d6m) between the outer diameter and inner diameter of the image side of the sixth spacer element, the radial distance of the light intercepted by the image side of the sixth spacer element can be constrained while ensuring the size of the inner diameter of the image side of the lens barrel. This effectively intercepts excess light at the tail end of the lens barrel and reduces stray light.

[0061] Preferably, the optical lens satisfies: 1.50≤d0m / (D6m-d6m)≤2.33.

[0062] According to some embodiments of this application, the spacing assembly further includes a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.85 < EP45 / CT5 ≤ 1.35; wherein EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis, and CT5 is the center thickness of the fifth lens.

[0063] In this way, by controlling the spacing EP45 between the fourth and fifth spacers along the optical axis, the ratio of the maximum axial thickness of the fifth lens mechanism to the center thickness CT5 of the fifth lens can be constrained to satisfy the above relationship. This can improve production feasibility while controlling the fifth lens molding process. This ratio meets the requirements of standardized ejector pin layout for injection molds.

[0064] Preferably, the optical lens satisfies: 0.87≤EP45 / CT5≤1.35.

[0065] According to some embodiments of this application, the optical lens satisfies: 2.25 < EP56 / CT6 < 3.45; where EP56 is the distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0066] In this way, by controlling the ratio of the spacing distance EP56 between the fifth and sixth spacers along the optical axis to the center thickness CT6 of the sixth lens to satisfy the above relationship, the maximum axial thickness of the mechanism of the sixth lens can be constrained, thus avoiding excessive axial thickness of the mechanism of the sixth lens from affecting lens forming, and avoiding material dispersion accumulation caused by excessive center thickness of the sixth lens.

[0067] Preferably, the optical lens satisfies: 2.26≤EP56 / CT6≤3.41.

[0068] According to some embodiments of this application, the spacing assembly further includes a third spacing element disposed on the image side of the third lens and in contact with the image side surface of the third lens, wherein the optical lens satisfies: 0.85≤EP34 / CT4<1.5; wherein EP34 is the spacing distance between the third spacing element and the fourth spacing element along the optical axis, and CT4 is the center thickness of the fourth lens.

[0069] In this way, by controlling the ratio of the axial distance EP34 between the third and fourth spacer elements to the center thickness CT4 of the fourth lens within the range of the above relationship, the range of the ratio of the thickness of the mechanism part of the fourth lens to the center thickness of the fourth lens can be indirectly constrained, thereby reducing the sensitivity of the lens and minimizing the influence of the positional tolerance of the fourth lens on the MTF.

[0070] Preferably, the optical lens satisfies: 0.85≤EP34 / CT4≤1.47.

[0071] According to some embodiments of this application, the spacing assembly further includes a seventh spacing element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens, wherein the optical lens satisfies: 1.60 < (T67 + CT7) / EP67 < 2.45; where T67 is the air gap between the sixth lens and the seventh lens on the optical axis, CT7 is the center thickness of the seventh lens, and EP67 is the spacing distance between the sixth spacing element and the seventh spacing element along the optical axis.

[0072] In this way, by setting a seventh spacer element that contacts the image side of the seventh lens, and by controlling the ratio of the sum of the air gap between the sixth and seventh lenses on the optical axis and the center thickness of the seventh lens (T67+CT7) to the spacing distance EP67 between the sixth and seventh spacers along the optical axis to satisfy the above relationship, the air gap between the seventh and sixth lenses and the thickness parameters of the seventh lens can be constrained. This helps to optimize the optical performance of the optical system, such as the light path propagation and aberration correction after the light passes through the sixth lens to the seventh lens, ensuring the imaging quality of the optical system. It also constrains the relative positions of the air gap, lens thickness and spacer element thickness of the sixth and seventh lenses, ensuring structural stability and assembly tolerance consistency.

[0073] Preferably, the optical lens satisfies: 1.62≤(T67+CT7) / EP67≤2.42.

[0074] According to some embodiments of this application, the spacer assembly further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, and a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical lens satisfies: 4.10 < CT2 / CT3 ≤ 4.60; and 4.95 < EP12 / (D2s-D1m) < 9.20; wherein CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, EP12 is the spacing distance between the first spacer element and the second spacer element along the optical axis, D2s is the outer diameter of the object side surface of the second spacer element, and D1m is the outer diameter of the image side surface of the first spacer element.

[0075] In this way, by setting the first and second spacer elements, the positions of the first and second lens mechanism parts can be located. By limiting the ratio of the center thickness of the second and third lenses and the ratio of the distance between the first and second spacer elements to the difference in outer diameter, the assembly relationship between the first and second lenses can be ensured while balancing the optical structure, thereby improving assembly accuracy and enhancing the stability of the optical system.

[0076] Preferably, the optical lens satisfies: 4.11≤CT2 / CT3≤4.62 and 4.98≤EP12 / (D2s-D1m)≤9.17.

[0077] According to some embodiments of this application, the spacer assembly further includes a first spacer element placed on the image side of the first lens and in contact with the image side of the first lens, a second spacer element placed on the image side of the second lens and in contact with the image side of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side of the third lens, and a fourth spacer element placed on the image side of the fourth lens and in contact with the image side of the fourth lens. The optical lens satisfies: 0.55 < EP12 / (EP01+EP23+EP34) ≤ 0.70; where EP12 is the spacing distance between the first spacer element and the second spacer element along the optical axis, EP01 is the distance from the object side of the lens barrel to the object side of the first spacer element along the optical axis, EP23 is the spacing distance between the second spacer element and the third spacer element along the optical axis, and EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis.

[0078] In this way, by setting corresponding spacers between each lens, the position of each lens in the optical lens can be precisely positioned, ensuring the stability of the optical lens. By controlling the spacing distance of each spacer element along the optical axis to satisfy the above relationship, the axial distance layout between the spacers can be optimized, and the space of each part can be rationally allocated. This helps to control the path of light propagation, reduce stray light interference, and thus improve the imaging quality and overall performance of the optical lens.

[0079] Preferably, the optical lens satisfies: 0.57≤EP12 / (EP01+EP23+EP34)≤0.70.

[0080] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical lens can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, as needed, the optical imaging lens may also include other numbers of spacers than those described in the above embodiments.

[0081] The following describes some specific, non-limiting embodiments of the above-described embodiments of this application in more detail with reference to the accompanying drawings. For example... Figure 2As shown, for ease of description, in the following embodiments, OBJ represents the object plane of the optical lens, STO represents the surface of the aperture stop, S1 represents the object-side surface of the first lens E1, S2 represents the image-side surface of the first lens E1, S3 represents the object-side surface of the second lens E2, S4 represents the image-side surface of the second lens E2, S5 represents the object-side surface of the third lens E3, S6 represents the image-side surface of the third lens E3, S7 represents the object-side surface of the fourth lens E4, S8 represents the image-side surface of the fourth lens E4, S9 represents the object-side surface of the fifth lens E5, S10 represents the image-side surface of the fifth lens E5, S11 represents the object-side surface of the sixth lens E6, S12 represents the image-side surface of the sixth lens E6, S13 represents the object-side surface of the seventh lens E7, S14 represents the image-side surface of the seventh lens, S15 represents the object-side surface of the filter, S16 represents the image-side surface of the filter, and S17 represents the image plane of the optical lens.

[0082] Example 1

[0083] like Figure 3 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0084] In this embodiment, the first lens E1 has negative optical power, and both its object-side surface S1 and image-side surface S2 are concave; the second lens E2 has positive optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are concave and convex, respectively; the fourth lens E4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex; the fifth lens E5 has positive optical power, and both its object-side surface S9 and image-side surface S10 are convex; the sixth lens E6 has negative optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0085] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0086] Table 1: Basic optical parameters of the optical lens in Example 1

[0087]

[0088] In this embodiment, except for the image-side surface S4 of the second lens E2, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0089] ;

[0090] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical mirrors S1 to S3 and S5 to S14 in Example 1.

[0091] Table 2: Aspherical coefficients of the optical lens in Example 1

[0092]

[0093] Example 2

[0094] like Figure 4As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0095] It is worth noting that, compared with the first embodiment above, the optical lens of this second embodiment has the same optical parameters, that is, the basic optical parameter table of the optical lens of this second embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2.

[0096] Specifically, the values ​​of various related structural parameters in this embodiment and the above embodiment are shown in Table 8 below. Multiple black object parameters specifically include: the outer diameter of the image-side surface of the first spacer element P1 (D1m); the outer diameter of the object-side surface of the second spacer element P2 (D2s); the inner diameter of the object-side surface of the fourth spacer element P4 (d4s); the outer diameter of the object-side surface of the fourth spacer element P4 (D4s); the inner diameter of the object-side surface of the fifth spacer element P5 (d5s); the outer diameter of the image-side surface of the fifth spacer element P5 (D5m); the inner diameter of the object-side surface of the sixth spacer element P6 (d6s); the inner diameter of the image-side surface of the sixth spacer element P6 (d6m); the outer diameter of the object-side surface of the sixth spacer element P6 (D6s); the outer diameter of the object-side surface of the sixth spacer element P6 (D6m); the inner diameter of the image-side surface of the lens barrel P0 (d0m); the inner diameter of the lens barrel... The distance EP01 from the object-side surface of P0 to the object-side surface of the first spacer P1 along the optical axis; the distance EP12 between the first spacer P1 and the second spacer P2 along the optical axis; the distance EP23 between the second spacer P2 and the third spacer P3 along the optical axis; the distance EP34 between the third spacer P3 and the fourth spacer P4 along the optical axis; the distance EP45 between the fourth spacer P4 and the fifth spacer P5 along the optical axis; the maximum thickness CP5 of the fifth spacer P5; the distance EP56 between the fifth spacer P5 and the sixth spacer P6 along the optical axis; and the distance EP67 between the sixth spacer P6 and the seventh spacer P7 along the optical axis. It is understood that the units of the values ​​shown in Table 8 are millimeters (mm), and the schematic diagrams of the parameters in the optical lens structure are as follows: Figure 1 As shown.

[0097] Example 3

[0098] like Figure 5As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0099] It is worth noting that, compared with Embodiment 1 above, the optical lens of Embodiment 3 has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment 3 is the same as Table 1, and the aspherical coefficient table is the same as Table 2. The values ​​of each relevant structural parameter in Embodiment 3 are shown in Table 8 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment 2 above, and will not be repeated here.

[0100] The on-axis chromatic aberration curves of the optical lenses in Examples 1, 2, and 3 are as follows: Figure 6A As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical lens; the astigmatism curves of the optical lenses in Embodiments 1, 2, and 3 are shown below. Figure 6B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 6A and Figure 6B It can be seen that the optical lenses in Embodiment 1, Embodiment 2 and Embodiment 3 can all achieve good imaging quality.

[0101] Example 4

[0102] like Figure 7As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0103] In this embodiment, the first lens E1 has negative optical power, and both its object-side surface S1 and image-side surface S2 are concave; the second lens E2 has positive optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are concave and convex, respectively; the fourth lens E4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex; the fifth lens E5 has positive optical power, and both its object-side surface S9 and image-side surface S10 are convex; the sixth lens E6 has negative optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0104] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0105] Table 3: Basic optical parameters of the optical lens in Example 4

[0106]

[0107] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 to S14 in Embodiment 4.

[0108] Table 4: Aspherical coefficients of the optical lens in Example 4

[0109]

[0110] Example 5

[0111] like Figure 8 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0112] It is worth noting that, compared with Embodiment 4 above, the optical lens of Embodiment 5 has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment 5 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The values ​​of each relevant structural parameter in Embodiment 5 are shown in Table 8 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment 2 above, and will not be repeated here.

[0113] Example 6

[0114] like Figure 9As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0115] It is worth noting that, compared with Embodiment 4 above, the optical lens of Embodiment 6 has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment 6 is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The values ​​of each relevant structural parameter in Embodiment 6 are shown in Table 8 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment 2 above, and will not be repeated here.

[0116] The on-axis chromatic aberration curves of the optical lenses in Examples 4, 5, and 6 are as follows: Figure 10A As shown, this indicates the degree of deviation of the focal point after light of different wavelengths passes through the optical lens; the astigmatism curves of the optical lenses in Examples 4, 5, and 6 are shown below. Figure 10B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 10A and Figure 10B It can be seen that the optical lenses in Embodiments 4, 5 and 6 can all achieve good imaging quality.

[0117] Example 7

[0118] like Figure 11As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0119] In this embodiment, the first lens E1 has negative optical power, and both its object-side surface S1 and image-side surface S2 are concave; the second lens E2 has positive optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has positive optical power, and its object-side surface S5 and image-side surface S6 are concave and convex, respectively; the fourth lens E4 has positive optical power, and both its object-side surface S7 and image-side surface S8 are convex; the fifth lens E5 has positive optical power, and both its object-side surface S9 and image-side surface S10 are convex; the sixth lens E6 has negative optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0120] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0121] Table 5: Basic optical parameters of the optical lens in Example 7

[0122]

[0123] In this embodiment, except for the object-side surface S7 of the fourth lens E4, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the seventh lens E7 are aspherical. The surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1 to S6 and S8 to S14 in Embodiment 7.

[0124] Table 6: Aspherical coefficient table of the optical lens in Example 7

[0125]

[0126] Example 8

[0127] like Figure 12 As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0128] It is worth noting that, compared with Embodiment Seven above, the optical lens of Embodiment Eight has the same optical parameters, that is, the basic optical parameter table of the optical lens of Embodiment Eight is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The values ​​of each relevant structural parameter in Embodiment Eight are shown in Table 8 below. The specific descriptions of multiple structural parameters are the same as the relevant descriptions in Embodiment Two above, and will not be repeated here.

[0129] Example 9

[0130] like Figure 13As shown, in this embodiment, the optical lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The spacing assembly includes a first spacing element P1 placed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a second spacing element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacing element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, a fifth spacing element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, a sixth spacing element P6 placed on the image side of the sixth lens E6 and in contact with the image side surface of the sixth lens E6, and a seventh spacing element P7 placed on the image side of the seventh lens E7 and in contact with the image side surface of the seventh lens E7.

[0131] It is worth noting that, compared with Embodiment Seven above, the optical lens of Embodiment Nine has the same optical parameters. That is, the basic optical parameter table of the optical lens of Embodiment Nine is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The values ​​of each relevant structural parameter in Embodiment Nine are shown in Table 8 below. The specific descriptions of multiple structural parameters are the same as those in Embodiment Two above, and will not be repeated here.

[0132] The on-axis chromatic aberration curves of the optical lenses in Examples 7, 8, and 9 are as follows: Figure 14A As shown, this indicates the degree of deviation of the focal point after light of different wavelengths passes through the optical lens; the astigmatism curves of the optical lenses in Embodiments 7, 8, and 9 are shown below. Figure 14B As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane. According to... Figure 14A and Figure 14B It can be seen that the optical lenses in Embodiments 7, 8 and 9 can all achieve good imaging quality.

[0133] In summary, in Examples 1 to 9, the Semi-FOV (half of the maximum field of view of the optical lens), the effective focal length f of the optical lens, and the effective focal lengths f1 to f7 of the first lens E1 to the seventh lens E7 in the optical lens are shown in Table 7 below.

[0134] Table 7: Optical Parameters of Optical Lenses

[0135]

[0136] Furthermore, the structural parameters of the optical lenses in Examples 1 to 9 are shown in Table 8.

[0137] Table 8: Structural Parameters of Optical Lenses

[0138]

[0139] In summary, the optical lenses in Examples 1 to 9 satisfy the relationships shown in Table 9, as detailed in Table 9.

[0140] Table 9: Relationships Satisfied by Optical Lenses

[0141]

[0142] It is worth mentioning that, according to one aspect of this application, one embodiment of this application further provides a camera module, which may include the aforementioned optical lens and a photosensitive element, the photosensitive element being disposed on the image side of the optical lens for imaging. It is understood that the photosensitive element mentioned in this application may, but is not limited to, be implemented as a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device, and this application will not elaborate further on this.

[0143] Furthermore, according to another aspect of this application, one embodiment of this application provides an electronic device that may include a camera module and a processor as described above. The camera module is communicatively connected to the processor for acquiring image data and inputting the image data into the processor for processing. It is understood that the electronic device mentioned in this application may, but is not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate further on this.

[0144] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0145] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical lens, characterized in that: The lens includes a lens barrel and a lens group and a spacer assembly housed within the lens barrel. The lens group is arranged sequentially along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power. The spacer assembly includes a fifth spacer element positioned on the image side of the fifth lens and in contact with the image side surface of the fifth lens, and a sixth spacer element positioned on the image side of the sixth lens and in contact with the image side surface of the sixth lens. The optical lens satisfies the following: -51.30<(f5+f6) / T56<-16.30; 2.75 < D5m / d5s < 3.85; and 2.25≤D6m / d6s<3.40; Wherein, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, D5m is the outer diameter of the image side of the fifth spacer element, d5s is the inner diameter of the object side of the fifth spacer element, D6m is the outer diameter of the image side of the sixth spacer element, and d6s is the inner diameter of the object side of the sixth spacer element.

2. The optical lens according to claim 1, characterized in that, The image-side surface of the sixth spacer element is in contact with the object-side surface of the seventh lens, and the optical lens satisfies the following: 1.25≤(D6s-d6s) / d6s<2.40; Wherein, D6s is the outer diameter of the object side of the sixth spacer element, and d6s is the inner diameter of the object side of the sixth spacer element.

3. The optical lens according to claim 1, characterized in that, The spacer assembly further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 2.35<(D4s-d4s) / d4s<3.85; Wherein, D4s is the outer diameter of the object side of the fourth spacer element, and d4s is the inner diameter of the object side of the fourth spacer element.

4. The optical lens according to claim 1, characterized in that, The spacer assembly further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.65≤EP56 / (CP5+EP45)<1.40; Wherein, EP56 is the distance between the fifth spacer element and the sixth spacer element along the optical axis, CP5 is the maximum thickness of the fifth spacer element, and EP45 is the distance between the fourth spacer element and the fifth spacer element along the optical axis.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies: 1.50≤d0m / (D6m-d6m)<2.35; Wherein, d0m is the inner diameter of the image-side surface of the lens barrel, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element.

6. The optical lens according to any one of claims 1 to 5, characterized in that, The spacer assembly further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.85 < EP45 / CT5 ≤ 1.35; Wherein, EP45 is the distance between the fourth spacer element and the fifth spacer element along the optical axis, and CT5 is the center thickness of the fifth lens.

7. The optical lens according to claim 6, characterized in that, The optical lens satisfies: 2.25 < EP56 / CT6 < 3.45; Wherein, EP56 is the distance between the fifth spacer element and the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

8. The optical lens according to claim 6, characterized in that, The spacing assembly further includes a third spacing element disposed on the image side of the third lens and in contact with the image side surface of the third lens, wherein the optical lens satisfies: 0.85≤EP34 / CT4<1.5; Wherein, EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis, and CT4 is the center thickness of the fourth lens.

9. The optical lens according to claim 1, characterized in that, The spacing assembly further includes a seventh spacing element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens, wherein the optical lens satisfies: 1.60<(T67+CT7) / EP67<2.45; Wherein, T67 is the air gap between the sixth lens and the seventh lens on the optical axis, CT7 is the center thickness of the seventh lens, and EP67 is the spacing distance between the sixth spacer element and the seventh spacer element along the optical axis.

10. The optical lens according to any one of claims 1 to 5, characterized in that, The spacing assembly further includes a first spacing element disposed on the image side of the first lens and in contact with the image side surface of the first lens, and a second spacing element disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical lens satisfies: 4.10 < CT2 / CT3 ≤ 4.60; and 4.95<EP12 / (D2s-D1m)<9.20; Wherein, CT2 is the center thickness of the second lens, CT3 is the center thickness of the third lens, EP12 is the distance between the first spacer and the second spacer along the optical axis, D2s is the outer diameter of the object side of the second spacer, and D1m is the outer diameter of the image side of the first spacer.

11. The optical lens according to any one of claims 1 to 5, characterized in that, The spacing assembly further includes a first spacing element disposed on the image side of the first lens and in contact with the image side surface of the first lens, a second spacing element disposed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacing element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a fourth spacing element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical lens satisfies: 0.55<EP12 / (EP01+EP23+EP34)≤0.70; Wherein, EP12 is the distance between the first spacer element and the second spacer element along the optical axis, EP01 is the distance from the object side of the lens barrel to the object side of the first spacer element along the optical axis, EP23 is the distance between the second spacer element and the third spacer element along the optical axis, and EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis.

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