Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, and a lens group and a spacing assembly which are accommodated in the lens barrel, the lens group comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with negative 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 positive focal power which are sequentially arranged from the object side to the image side along the optical axis; the image side surface of the fifth lens is glued with the object side surface of the sixth lens; the spacing assembly comprises a second spacing element which is arranged between the second lens and the third lens and is in contact with the image side surface of the second lens; the third spacing element is arranged on the image side of the third lens and is in contact with the image side surface of the third lens; the sixth spacing element is arranged between the sixth lens and the seventh lens and is in contact with the image side surface of the sixth lens; the optical imaging lens satisfies the following conditions:-5.60 < f6 / f * tan (FOV / 4) < =-4.90; and 2.40 < = CP6 / T67 < 3.45.

Description

Technical Field

[0001] The present application relates to the technical field of optical elements, and in particular to an optical imaging lens. Background Art

[0002] With the development of short videos, people have higher and higher requirements for shooting, and shooting methods such as sports camera shooting and drone aerial photography are becoming more and more popular. Compared with before, wide-angle lenses were basically used for auxiliary photography or obstacle avoidance. Now the lens also needs to take into account the photo function. While enhancing the imaging quality of the lens, it can also improve the obstacle avoidance effect. Some existing ultra-wide-angle lenses have chromatic aberration problems, which makes it difficult to meet the needs of wide-angle shooting while taking into account the color resolution of the lens, resulting in a low imaging level. Summary of the invention

[0003] One advantage of the present application is that it provides an optical imaging lens that can improve the chromatic aberration of the optical imaging lens by gluing two lenses together while meeting the requirements of wide-angle shooting, thereby improving the color resolution of the wide-angle lens and improving the overall level of the lens.

[0004] The present application provides an optical imaging lens, comprising: a lens barrel, a lens group and a spacer assembly contained in the lens barrel; the lens group comprises: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative 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 positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface and the image side surface of the first lens are convex and concave respectively; the object side surface and the image side surface of the second lens are convex and concave respectively; the object side surface and the image side surface of the third lens are convex and concave respectively; the object side surface and the image side surface of the fourth lens are The side surface and the image side surface are concave and convex respectively; the object side surface and the image side surface of the fifth lens are both convex surfaces; the object side surface and the image side surface of the sixth lens are both concave surfaces; the object side surface and the image side surface of the seventh lens are both convex surfaces, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens; the spacing component includes a second spacing element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacing element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacing element placed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the optical imaging lens satisfies: -5.60<f6 / f×tan(FOV / 4)≤-4.90; and 2.40≤CP6 / T67<3.45; Among them, f6 is the effective focal length of the sixth lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction.

[0005] According to some embodiments of the present application, the optical imaging lens satisfies: 2.35<(CT5+CT6) / CP6<3.20; Among them, CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacing element.

[0006] According to some embodiments of the present application, the optical imaging lens satisfies: 1.30<(T67+CT7) / CP6<2.05; Wherein, T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction, CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacing element.

[0007] According to some embodiments of the present application, the optical imaging lens satisfies: 1.55mm -1 ≤N6 / (D6s-d6s)<2.85mm -1 ; Wherein, N6 is the material refractive index of the sixth lens, D6s is the object side outer diameter of the sixth spacing element, and d6s is the object side inner diameter of the sixth spacing element.

[0008] According to some embodiments of the present application, the optical imaging lens satisfies: 6.80<d6s / (T56+CT6)<8.75; Wherein, d6s is the object side inner diameter of the sixth spacer element, T56 is the air spacing between the centers of the fifth lens and the sixth lens in the optical axis direction, and CT6 is the center thickness of the sixth lens on the optical axis.

[0009] According to some embodiments of the present application, the optical imaging lens satisfies: 2.65<R13 / (D6m-d6m)<6.50; Among them, R13 is the curvature radius of the object side of the seventh lens, D6m is the image side outer diameter of the sixth spacing element, and d6m is the image side inner diameter of the sixth spacing element.

[0010] According to some embodiments of the present application, the optical imaging lens satisfies: -13.60≤R14 / (D0m-d0m)<-3.20; Among them, R14 is the curvature radius of the image side surface of the seventh lens, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

[0011] According to some embodiments of the present application, the optical imaging lens satisfies: 1.80<d0m / f7<2.35; Wherein, d0m is the image side inner diameter of the lens barrel, and f7 is the effective focal length of the seventh lens.

[0012] According to some embodiments of the present application, the optical imaging lens satisfies: 1.00<BFL / (D0m-d0m)≤1.95; Wherein, BFL is the distance from the image side surface of the seventh lens to the imaging surface, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

[0013] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20<EP02 / EP23≤2.45; Among them, EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacing element, and EP23 is the distance from the image side surface of the second spacing element to the object side surface of the third spacing element.

[0014] According to some embodiments of the present application, the optical imaging lens satisfies: 0.90<(D6s-d6s) / (D6m-d6m)<2.55; Among them, D6s is the object side outer diameter of the sixth spacing element, d6s is the object side inner diameter of the sixth spacing element, D6m is the image side outer diameter of the sixth spacing element, and d6m is the image side inner diameter of the sixth spacing element.

[0015] According to some embodiments of the present application, the optical imaging lens satisfies: 3.90<d6s / CP6<5.15; Wherein, d6s is the object side inner diameter of the sixth spacing element, and CP6 is the maximum thickness of the sixth spacing element.

[0016] According to some embodiments of the present application, the optical imaging lens satisfies: -1.45<T23 / (d3s-d2s)<-1.05; Wherein, T23 is the air space between the centers of the second lens and the third lens in the optical axis direction, d3s is the object side inner diameter of the third spacing element, and d2s is the object side inner diameter of the second spacing element.

[0017] According to some embodiments of the present application, the optical imaging lens satisfies: 0.75<(EP23+CP3) / T34<1.05; Among them, EP23 is the distance from the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, and T34 is the air gap between the centers of the third lens and the fourth lens in the optical axis direction.

[0018] According to some embodiments of the present application, the optical imaging lens satisfies: 1.05≤CT7 / CP6<1.65; Wherein, CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the six spacer elements.

[0019] According to some embodiments of the present application, the optical imaging lens satisfies: 5.50≤L / CT7<7.25; Wherein, L is the distance from the object side surface to the image side surface of the lens barrel, and CT7 is the center thickness of the seventh lens on the optical axis.

[0020] In summary, the optical imaging lens of the present application is a seven-piece ultra-wide-angle large-aperture mobile phone lens. By designing the fifth lens and the sixth lens to be in a glued state, the chromatic aberration problem of the ultra-wide-angle lens is improved, the color resolution of the lens is improved, and the overall level of the lens is improved. However, combined with the characteristics of the glued lens, since the fifth lens is a convex lens, the sixth lens must be a concave lens with negative optical focal length to cooperate with the fifth lens to adjust the dispersion. At the same time, in order to meet the focal length requirements, the seventh lens must be a convex lens with positive optical focal length, which results in a shorter center distance between the sixth lens and the seventh lens along the optical axis and a longer edge distance in the optical axis direction. Therefore, it is necessary to insert a thick spacer element in the middle of the supporting position of the sixth lens and the seventh lens. The above relationship reflects that the relative ratio of the image surface edge gap and the center gap of the sixth lens and the seventh lens is within a reasonable range, which can make the lens have both good imaging quality and eliminate chromatic aberration. When this ratio is larger, the gap at the edge of the lens becomes larger, the gap at the center becomes smaller, and the adjacent curvature radius becomes smaller, causing the optical fiber to become dispersed. The larger the diffuse spot of the optical fiber in the field of view outside the lens, the worse the imaging quality, which may cause the image outside the field of view to be blurred. When this ratio is smaller, the gap at the edge of the lens becomes smaller, the gap at the center becomes larger, and the adjacent curvature radii become closer, resulting in a worse chromatic aberration elimination effect of the cemented lens, which may cause the image outside the field of view of the lens to have a rainbow edge or a large area of ​​the image to be reddish or purple. Therefore, by controlling this ratio within a reasonable range, the lens can have both good imaging quality and chromatic aberration elimination. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of structural parameters of an optical imaging lens according to an embodiment of the present application; Figure 2 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application; Figure 3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application; Figure 4 is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application; Figure 5A Schematic diagrams of axial chromatic aberration curves of the optical imaging lenses according to the first, second and third embodiments of the present application are shown; Figure 5B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the first embodiment, the second embodiment, and the third embodiment of the present application are shown; Figure 5C A schematic diagram of magnification chromatic aberration curves of the optical imaging lenses according to the first embodiment, the second embodiment, and the third embodiment of the present application is shown; Figure 6is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application; Figure 7 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application; Figure 8 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application; Fig. 9A A schematic diagram of an axial chromatic aberration curve of the optical imaging lens according to the fourth embodiment, the fifth embodiment and the sixth embodiment of the present application is shown; Fig. 9B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the fourth embodiment, the fifth embodiment, and the sixth embodiment of the present application are shown; Fig. 9C A schematic diagram of magnification chromatic aberration curves of the optical imaging lenses according to the fourth embodiment, the fifth embodiment, and the sixth embodiment of the present application is shown; Fig.10 is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application; Fig.11 is a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application; Fig.12 is a schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application; Fig.13A Schematic diagrams of axial chromatic aberration curves of the optical imaging lenses according to the seventh embodiment, the eighth embodiment, and the ninth embodiment of the present application are shown; Fig. 13B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the seventh embodiment, the eighth embodiment, and the ninth embodiment of the present application are shown; Fig. 13C A schematic diagram of magnification chromatic aberration curves of the optical imaging lenses according to the seventh embodiment, the eighth embodiment and the ninth embodiment of the present application is shown; Fig.14 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=1.8 is shown; Fig.15 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=2.73 is shown; Fig.16 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=3.11 is shown; Fig.17 A schematic diagram of the light spot when the optical imaging lens satisfies the relationship CP6 / T67=3.92 is shown. DETAILED DESCRIPTION

[0022] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present 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.

[0023] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0024] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0025] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface type in the paraxial area can be judged according to the general method in this field, for example, the positive and negative R value (R refers to the radius of curvature of the paraxial area) is used to judge the concave and convex. In this article, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0026] It should also be understood that the terms "comprises", "including", "having", "includes" 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0027] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0028] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0029] According to one aspect of the present application, Figure 1 As shown, one embodiment of the present application provides an optical imaging lens, which may include a lens barrel and a lens group and a spacer assembly contained in the lens barrel; the lens group includes: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative 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 positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface and the image side surface of the first lens are convex and concave respectively; the object side surface and the image side surface of the second lens are convex and concave respectively; the object side surface and the image side surface of the third lens are respectively The object side surface and the image side surface of the fourth lens are concave and convex respectively; the object side surface and the image side surface of the fifth lens are both convex surfaces; the object side surface and the image side surface of the sixth lens are both concave surfaces; the object side surface and the image side surface of the seventh lens are both convex surfaces, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens; the spacing assembly includes a second spacing element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacing element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacing element placed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens.

[0030] In particular, the optical imaging lens satisfies: -5.60<f6 / f×tan(FOV / 4)≤-4.90; and 2.40≤CP6 / T67<3.45; wherein f6 is the effective focal length of the sixth lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction.

[0031] It is worth noting that the optical imaging lens of the present application is a seven-piece ultra-wide-angle large-aperture mobile phone lens. By designing the fifth lens and the sixth lens to be in a glued state, the chromatic aberration problem of the ultra-wide-angle lens is improved, the color resolution of the lens is improved, and the overall level of the lens is improved. However, combined with the characteristics of the glued lens, since the fifth lens is a convex lens, the sixth lens must be a concave lens with negative focal length to cooperate with the fifth lens to adjust the dispersion. At the same time, in order to meet the focal length requirements, the seventh lens must be a convex lens with positive focal length, which results in a shorter center distance between the sixth lens and the seventh lens along the optical axis and a longer edge distance in the optical axis direction. Therefore, it is necessary to insert a thick spacer element between the bearing position of the sixth lens and the seventh lens. The above relationship reflects that the relative ratio of the image surface edge gap to the center gap of the sixth lens and the seventh lens is within a reasonable range, which can enable the lens to have both good imaging quality and eliminate chromatic aberration. When this ratio is larger, the gap at the edge of the lens becomes larger, the gap at the center becomes smaller, and the adjacent curvature radius becomes smaller, causing the optical fiber to become dispersed. The larger the diffuse spot of the optical fiber in the field of view outside the lens, the worse the imaging quality, which may cause the image outside the field of view to be blurred. When this ratio is smaller, the gap at the edge of the lens becomes smaller, the gap at the center becomes larger, and the adjacent curvature radii become closer, resulting in a worse chromatic aberration elimination effect of the cemented lens, which may cause the image outside the field of view of the lens to have a rainbow edge or a large area of ​​the image to be reddish or purple. Therefore, by controlling this ratio within a reasonable range, the lens can have both good imaging quality and chromatic aberration elimination.

[0032] For example, Fig.14 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=1.8 is shown; Fig.15 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=2.73 is shown; Fig.16 A schematic diagram of a light spot when the optical imaging lens satisfies the relationship CP6 / T67=3.11 is shown; Fig.17 The figure shows the light spot diagram when the optical imaging lens satisfies the relationship CP6 / T67=3.92. Fig.15 and Fig.16It can be seen that when the relationship CP6 / T67 is greater than 2.10 and less than or equal to 3.41, when the main wavelength is 0.555μm, the distribution of diffuse spots under 0F, 0.46F, 0.88F and 1.0F fields of view is as follows: Fig.15 and Fig.16 As shown in the figure, the diffuse spot in the spot diagram is within an acceptable range, and the optical imaging lens can take into account both imaging quality and chromatic aberration elimination. Fig.14 It can be seen that when the relationship CP6 / T67 is less than 2.10, when the main wavelength is 0.555μm, the distribution of diffuse spots under 0F, 0.46F, 0.88F and 1.0F fields of view is as follows: Fig.14 As shown in the figure, the diffuse spot in the spot diagram is too large, indicating that the ratio of CP6 / T67 is too small, the gap at the edge of the lens is too small, the gap at the center is too large, and the adjacent curvature radii are too close, resulting in poor chromatic aberration elimination effect of the glued lens. Fig.17 It can be seen that when the relationship CP6 / T67 is greater than 3.41, when the main wavelength is 0.555μm, the distribution of diffuse spots under 0F, 0.46F, 0.88F and 1.0F fields of view is as follows: Fig.17 As shown, the diffuse spot in the spot diagram is too large, indicating that the ratio of CP6 / T67 is too large, the edge gap of the lens is too large, the center gap is too small, and the adjacent curvature radius is too small, causing the light to become scattered and the imaging effect is poor.

[0033] Preferably, the optical imaging lens satisfies: -5.56≤f6 / f×tan(FOV / 4)≤-4.90; and 2.40≤CP6 / T67≤3.43.

[0034] Since the fifth lens and the sixth lens are cemented lenses, it is necessary to ensure that the first lens receiving light is a lens with positive focal length, and the second lens is a lens with negative focal length, and the two lenses are cemented together to achieve the purpose of correcting chromatic aberration of the optical imaging lens. According to some embodiments of the present application, the optical imaging lens satisfies: 2.35<(CT5+CT6) / CP6<3.20; wherein CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0035] In this way, by controlling the center thickness of the two fifth lenses and the sixth lens within the above relationship, the lens can effectively correct chromatic aberration and the feasibility of lens production can be guaranteed. At the same time, by reasonably controlling the maximum thickness of the sixth spacer element, the light emitted by the sixth lens can be converged to the image plane, reducing the diffuse spot and improving the image quality.

[0036] Preferably, the optical imaging lens satisfies: 2.39≤(CT5+CT6) / CP6≤3.18.

[0037] According to some embodiments of the present application, the optical imaging lens satisfies: 1.30<(T67+CT7) / CP6<2.05; wherein T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction, CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacing element.

[0038] Thus, due to the influence of the principle of chromatic aberration correction of the cemented lens, the sixth lens must be a negative power lens. By controlling the above relationship, the edge light of the sixth lens is gathered and can be accurately converged on the theoretical image plane, reducing the defocus distance of the edge optical field of view and improving the imaging quality of the lens. At the same time, it can prevent the assembled lens from interfering with the effective diameter surface of the lens in the optical axis direction, avoid problems such as abnormal appearance and performance of the lens, and improve the appearance and performance yield.

[0039] Preferably, the optical imaging lens satisfies: 1.34≤(T67+CT7) / CP6≤2.03.

[0040] According to some embodiments of the present application, the optical imaging lens meets the following requirements: 1.55 mm -1 ≤N6 / (D6s-d6s)<2.85mm -1 ; wherein N6 is the material refractive index of the sixth lens, D6s is the object side outer diameter of the sixth spacing element, and d6s is the object side inner diameter of the sixth spacing element.

[0041] In this way, since the sixth lens is a lens with negative optical power, by controlling the above relationship, light dispersion can be weakened, excess light can be blocked and absorbed, and stray light formed by light reflection between lenses can be avoided, thereby improving the imaging quality of the lens.

[0042] Preferably, the optical imaging lens meets the following requirements: 1.56 mm -1 ≤N6 / (D6s-d6s)≤2.84mm -1 .

[0043] According to some embodiments of the present application, the optical imaging lens satisfies: 6.80<d6s / (T56+CT6)<8.75; wherein d6s is the object side inner diameter of the sixth spacer element, T56 is the air spacing between the centers of the fifth lens and the sixth lens in the optical axis direction, and CT6 is the center thickness of the sixth lens on the optical axis.

[0044] In this way, since the air gap between the fifth lens and the sixth lens has a greater influence on the correction effect of the lens chromatic aberration of the cemented lens, by controlling the above relationship, the emission angle of the light in the sixth lens can be affected. Under the condition of ensuring that the normal light is not affected, the light exceeding the reasonable angle is blocked to reduce the generation of stray light.

[0045] Preferably, the optical imaging lens satisfies: 6.83≤d6s / (T56+CT6)≤8.73.

[0046] According to some embodiments of the present application, the optical imaging lens satisfies: 2.65<R13 / (D6m-d6m)<6.50; wherein R13 is the radius of curvature of the object side of the seventh lens, D6m is the image side outer diameter of the sixth spacer element, and d6m is the image side inner diameter of the sixth spacer element.

[0047] In this way, since the seventh lens is a convex lens with positive optical power, the curvature radius of the object side surface of the seventh lens determines that the flange portion of the seventh lens used for assembly support will be farther away from the flange support portion of the sixth lens. Therefore, by controlling the above relationship, the support misalignment step difference between the seventh lens and the sixth lens can be reduced, the load-bearing capacity of the lens in the reliability experiment can be improved, and then the reliability quality of the lens can be improved.

[0048] Preferably, the optical imaging lens satisfies: 2.67≤R13 / (D6m-d6m)≤6.48.

[0049] According to some embodiments of the present application, the optical imaging lens satisfies: -13.60≤R14 / (D0m-d0m)<-3.20; wherein R14 is the radius of curvature of the image side surface of the seventh lens, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

[0050] In this way, since the seventh lens is the last lens on the image plane of the lens, by controlling the above relationship, the effective diameter area of ​​the entire seventh lens does not protrude from the bottom end surface of the image side of the lens barrel, which can reduce the risk of scratches and damage to the lens during lens assembly and use, and improve the lens production yield. It can also ensure the rigid structural strength of the lens while leaving a certain space for gluing the seventh lens and the lens barrel, and the space reserved according to the above relationship can ensure that a sufficient and stable amount of glue can be set, so that the lens does not fail in the reliability experiment, so as to further improve the reliability requirements of the lens.

[0051] Preferably, the optical imaging lens satisfies: -13.60≤R14 / (D0m-d0m)≤-3.24.

[0052] According to some embodiments of the present application, the optical imaging lens satisfies: 1.80<d0m / f7<2.35; wherein d0m is the image side inner diameter of the lens barrel, and f7 is the effective focal length of the seventh lens.

[0053] In this way, by controlling the inner diameter of the image side of the lens barrel, it is helpful to control the amount of glue between the seventh lens and the lens barrel, which helps to improve the structural strength of the lens, and can prevent the lens barrel from blocking the effective light emitted by the seventh lens, avoid dark corners when the lens is imaging, and improve the final imaging quality of the lens.

[0054] Preferably, the optical imaging lens satisfies: 1.83≤d0m / f7≤2.34.

[0055] According to some embodiments of the present application, the optical imaging lens satisfies: 1.00<BFL / (D0m-d0m)≤1.95; wherein BFL is the distance from the image side surface of the seventh lens to the imaging surface, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

[0056] In this way, the difference between the image side inner diameter and the image side outer diameter of the lens barrel is the physical thickness of the image side surface of the lens barrel. By controlling the above relationship, the physical thickness of the image side surface of the lens barrel can be reasonably controlled, so that the lens barrel has a certain physical strength while not interfering with the position of chips and other components due to its excessive size, which can help the module to smoothly complete the lens focusing process and ensure the smooth progress of the subsequent processes.

[0057] Preferably, the optical imaging lens satisfies: 1.04≤BFL / (D0m-d0m)≤1.94.

[0058] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20<EP02 / EP23≤2.45; wherein EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacing element, and EP23 is the distance between the image side surface of the second spacing element and the object side surface of the third spacing element.

[0059] In this way, the first lens, the second lens and the third lens of the lens all function to collect light. The first lens, the second lens and the third lens are all arched structure lenses with convex and concave surfaces on the object side and image side respectively. By reasonably controlling the thickness of the flange parts of these three lenses, the processing feasibility and molding yield of the lenses can be improved, and it is helpful to improve the surface accuracy of the lenses after molding, thereby improving the imaging quality and production yield of the lenses.

[0060] Preferably, the optical imaging lens satisfies: 1.23≤EP02 / EP23≤2.45.

[0061] According to some embodiments of the present application, the optical imaging lens satisfies: 0.90<(D6s-d6s) / (D6m-d6m)<2.55; wherein D6s is the object side outer diameter of the sixth spacer element, d6s is the object side inner diameter of the sixth spacer element, D6m is the image side outer diameter of the sixth spacer element, and d6m is the image side inner diameter of the sixth spacer element.

[0062] Thus, in the above relationship, (D6s-d6s) and (D6m-d6m) represent the supporting area of ​​the sixth spacer element and the sixth lens and the supporting area of ​​the seventh lens respectively. By reasonably controlling the ratio of (D6s-d6s) and (D6m-d6m), the lens supporting can have a certain stability, thereby improving the supporting stability of the lens in mechanical reliability experiments and improving the lens quality.

[0063] Preferably, the optical imaging lens satisfies: 0.91≤(D6s-d6s) / (D6m-d6m)≤2.51.

[0064] According to some embodiments of the present application, the optical imaging lens satisfies: 3.90<d6s / CP6<5.15; wherein d6s is the object side inner diameter of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0065] In this way, by controlling the object side inner diameter of the sixth spacer element and the maximum thickness of the sixth spacer element through the above relationship, a stable supporting space can be provided for the sixth lens and the seventh lens to reduce the field curvature variation outside the lens field of view, and can also ensure that stray light is blocked, reduce excess light entering the seventh lens, and improve imaging quality.

[0066] Preferably, the optical imaging lens satisfies: 3.90≤d6s / CP6≤5.12.

[0067] According to some embodiments of the present application, the optical imaging lens satisfies: -1.45<T23 / (d3s-d2s)<-1.05; wherein T23 is the air gap between the centers of the second lens and the third lens in the optical axis direction, d3s is the object side inner diameter of the third spacing element, and d2s is the object side inner diameter of the second spacing element.

[0068] In this way, since the light tends to converge between the second lens and the third lens, by reasonably controlling the inner diameters of the second spacing element and the third spacing element, invalid light can be blocked and absorbed to reduce the risk of stray light. The field of view angle of the lens can also be guaranteed, and light exceeding the field of view angle can be blocked to ensure the design specifications of the lens.

[0069] Preferably, the optical imaging lens satisfies: -1.42≤T23 / (d3s-d2s)≤-1.06.

[0070] According to some embodiments of the present application, the optical imaging lens satisfies: 0.75<(EP23+CP3) / T34<1.05; wherein EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element, CP3 is the maximum thickness of the third spacer element, and T34 is the air spacing between the centers of the third lens and the fourth lens in the optical axis direction.

[0071] In this way, EP23 represents the thickness of the flange portion of the third lens. The air gap between the third lens and the fourth lens on the optical axis and the maximum thickness of the third spacing element can control the curvature radius of the image side surface of the third lens and the object side surface of the fourth lens. Controlling this part of the parameters through the above relationship is helpful to control the uniformity of the thickness of the third lens, making the lens easier to shape and helping to improve the internal reflection stray light of the third lens and the fourth lens.

[0072] Preferably, the optical imaging lens satisfies: 0.76≤(EP23+CP3) / T34≤1.03.

[0073] According to some embodiments of the present application, the optical imaging lens satisfies: 1.05≤CT7 / CP6<1.65; wherein CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the six spacer elements.

[0074] In this way, since the seventh lens is a convex lens with positive focal length, the sixth spacing element serves as a spacing element that supports the sixth lens and the seventh lens. The center thickness of the seventh lens and the thickness of the sixth spacing element will affect the distance between the two lenses in the direction of the central optical axis. If the distance is too close, the center point of the lens is more likely to collide during assembly or when the lens is subjected to impact, causing damage to the lens. If the distance is too far, the seventh lens will extend beyond the bottom end surface of the lens barrel, and the outer diameter will cause scratches on the seventh lens during assembly or lens transportation. The distance between the two lenses is controlled by the above relationship to avoid damage to the lenses.

[0075] Preferably, the optical imaging lens satisfies: 1.05≤CT7 / CP6≤1.62.

[0076] According to some embodiments of the present application, the optical imaging lens satisfies: 5.50≤L / CT7<7.25; wherein L is the distance from the object side surface to the image side surface of the lens barrel, and CT7 is the center thickness of the seventh lens on the optical axis.

[0077] In this way, since the fifth lens and the sixth lens are cemented lenses, the cemented lens has a dispersion-improving effect, and the light emitted is divergent light, and the proportion of the center thickness of the seventh lens in the thickness of the entire lens reflects the light-gathering ability of the seventh lens. By controlling the above relationship, the light can be gathered on the image plane, the clarity of the lens is improved, and the imaging quality of the lens is guaranteed.

[0078] Preferably, the optical imaging lens satisfies: the optical imaging lens satisfies: 5.50≤L / CT7≤7.24.

[0079] It should be noted that those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and the present application does not make specific limitations on this. For example, as required, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0080] Some specific but non-limiting embodiments of the above-mentioned embodiments of the present application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object plane of the optical imaging lens, STO represents the surface of the aperture, 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, and S14 represents the image-side surface of the seventh lens E7. In addition, Aj represents the j-th order aspheric coefficient, j=4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30.

[0081] Embodiment 1 like Figure 2As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0082] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0083] In this embodiment, the spacing assembly also includes a fourth spacing element P4 placed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a fourth auxiliary spacing element P4b placed between the fourth spacing element P4 and the fifth lens E5 and in contact with the image side surface of the fourth spacing element P4.

[0084] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Example 1, wherein the units of the curvature radius, thickness / distance and effective radius are all millimeters (mm).

[0085] Table 1: Basic optical parameters of the optical imaging lens of Example 1

[0086] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side surface and the image side surface of any lens in the lens group are aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula: ; Wherein, x is the distance vector height from the vertex of the aspherical surface when the aspherical surface is at a height of 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 curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical mirror surface S3 to S6 and S9 to S13 in Example 4.

[0087] Table 2: Aspheric coefficients of the optical imaging lens of Example 1

[0088] Embodiment 2 like Figure 3 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0089] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0090] In this embodiment, the spacing assembly also includes a fourth spacing element P4 placed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a fourth auxiliary spacing element P4b placed between the fourth spacing element P4 and the fifth lens E5 and in contact with the image side surface of the fourth spacing element P4.

[0091] It is worth noting that compared with the above-mentioned embodiment 1, the optical imaging lens of the second embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the second embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of the second embodiment has a different black object structure from the optical imaging lens of the first embodiment, that is, the difference between the second embodiment and the first embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different.

[0092] Specifically, the values ​​of the various related structural parameters in the second embodiment and the above-mentioned first embodiment are respectively as shown in Table 8 below, and the multiple black object parameters specifically include: the object side inner diameter d2s of the second spacing element P2; the object side inner diameter d3s of the third spacing element P3; the object side outer diameter D6s of the sixth spacing element P6; the object side inner diameter d6s of the sixth spacing element P6; the image side outer diameter D6m of the sixth spacing element; the image side inner diameter d6m of the sixth spacing element P6; the image side outer diameter D0m of the lens barrel P0; the image side inner diameter d0m of the lens barrel P0; the distance EP02 between the object side surface of the lens barrel P0 and the object side surface of the second spacing element P2; the distance EP23 from the image side surface of the second spacing element P2 to the object side surface of the third spacing element P3; the maximum thickness CP3 of the third spacing element P3; the maximum thickness CP6 of the fourth spacing element P6; the spacing L from the object side surface to the image side surface of the lens barrel P0. It is understood that the units of the values ​​of the parameters shown in Table 8 are all millimeters (mm), and the schematic diagram of the parameters in the structure diagram of the optical imaging lens is as follows: Figure 1 shown.

[0093] Embodiment 3 like Figure 4As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0094] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0095] In this embodiment, the spacing assembly further includes a fourth spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4.

[0096] It is worth noting that compared with the above-mentioned embodiment 1, the optical imaging lens of the embodiment 3 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the embodiment 3 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of the embodiment 3 has a different black object structure from the optical imaging lens of the above-mentioned embodiment 1, that is, the difference between the embodiment 3 and the above-mentioned embodiment 1 is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values ​​of the various related structural parameters in the embodiment 3 are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the above-mentioned embodiment 2, which will not be repeated here.

[0097] After simulation test, the axial chromatic aberration curves of the optical imaging lenses in Embodiment 1, Embodiment 2 and Embodiment 3 are as follows: Figure 5AAs shown, it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in the first embodiment, the second embodiment and the third embodiment are as shown in Figure 5B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Embodiment 1, Embodiment 2 and Embodiment 3 are as shown Figure 5C As shown in , it shows the change in magnification of light of different wavelengths when imaging. Figure 5A , Figure 5B and Figure 5C It can be seen that the optical imaging lenses in Embodiment 1, Embodiment 2 and Embodiment 3 can all achieve good imaging quality.

[0098] Embodiment 4 like Figure 6 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0099] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0100] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0101] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness / distance and effective radius are all millimeters (mm).

[0102] Table 3: Basic optical parameters of the optical imaging lens of Example 4

[0103] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side surface and the image side surface of any lens in the lens group are aspherical surfaces, and the surface shape of each aspherical lens can be defined by the aspherical surface formula given in the above embodiment 1. The following Table 4 gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of each aspherical mirror surface S3 to S6 and S9 to S13 in the embodiment 4.

[0104] Table 4: Aspheric coefficients of the optical imaging lens of Example 4

[0105] Embodiment 5 like Figure 7 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0106] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0107] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0108] It is worth noting that, compared with the above-mentioned fourth embodiment, the optical imaging lens of the fifth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the fifth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of the fifth embodiment has a different black object structure from the optical imaging lens of the fourth embodiment, that is, the difference between the fifth embodiment and the fourth embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values ​​of the various related structural parameters in the fifth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0109] Embodiment 6 like Figure 8 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0110] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0111] In this embodiment, the spacing assembly further includes a fourth spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4.

[0112] It is worth noting that compared with the above-mentioned fourth embodiment, the optical imaging lens of the sixth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the sixth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of the sixth embodiment has a different black object structure from the optical imaging lens of the fourth embodiment, that is, the difference between the sixth embodiment and the fourth embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values ​​of the various related structural parameters in the sixth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0113] After simulation test, the axial chromatic aberration curves of the optical imaging lenses in the fourth, fifth and sixth embodiments are as follows: Fig. 9A As shown, it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in the fourth embodiment, the fifth embodiment and the sixth embodiment are as shown in Fig. 9B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Embodiment 4, Embodiment 5 and Embodiment 6 are shown in Fig. 9C As shown in , it shows the change in magnification of light of different wavelengths when imaging. Fig. 9A , Fig. 9B and Fig. 9C It can be seen that the optical imaging lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0114] Embodiment 7 like Fig.10As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0115] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0116] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0117] In addition, Table 5 shows basic optical parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance and effective radius are all millimeters (mm).

[0118] Table 5: Basic optical parameters of the optical imaging lens of Example 7

[0119] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side surface and the image side surface of any lens in the lens group are aspherical surfaces, and the surface shape of each aspherical lens can be defined by the aspherical surface formula given in the above embodiment 1. The following table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of each aspherical mirror surface S3 to S6 and S9 to S13 in embodiment 4.

[0120] Table 6: Aspheric coefficients of the optical imaging lens of Example 7

[0121] Embodiment 8 like Fig.11 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0122] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0123] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b disposed between the third spacer element P3 and the fourth lens E4 and in contact with the image side surface of the third spacer element P3.

[0124] It is worth noting that, compared with the seventh embodiment, the optical imaging lens of the eighth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the eighth embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of the eighth embodiment has a different black object structure from the optical imaging lens of the seventh embodiment, that is, the difference between the eighth embodiment and the seventh embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values ​​of the various related structural parameters in the eighth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0125] Embodiment 9 like Fig.12 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly contained in the lens barrel P0; the lens group comprises: a first lens E1 with negative optical power, a second lens E2 with negative optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with positive optical power, a sixth lens E6 with negative optical power, and a seventh lens E7 with positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave respectively; The object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces respectively; the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces respectively; the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are concave and convex surfaces respectively; the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are both concave surfaces; the object-side surface S13 and the image-side surface S14 of the seventh lens E7 are both convex surfaces, and the image-side surface S10 of the fifth lens E5 is glued to the object-side surface S11 of the sixth lens E6.

[0126] The spacing assembly includes a second spacing element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side surface of the second lens E2, a third spacing element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side surface of the third lens E3, and a sixth spacing element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0127] In this embodiment, the spacing assembly further includes a fourth spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4.

[0128] It is worth noting that, compared with the seventh embodiment, the optical imaging lens of the ninth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of the ninth embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of the ninth embodiment has a different black object structure from the optical imaging lens of the seventh embodiment, that is, the difference between the ninth embodiment and the seventh embodiment is that the size values ​​of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values ​​of the various related structural parameters in the ninth embodiment are shown in Table 8 below, and the specific description of the multiple black object parameters is the same as the related description in the second embodiment above, which will not be repeated here.

[0129] After simulation test, the axial chromatic aberration curves of the optical imaging lenses in Embodiment 7, Embodiment 8 and Embodiment 9 are as follows: Fig.13A As shown in FIG. 1 , it indicates the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Embodiment 7, Embodiment 8 and Embodiment 9 are shown in FIG. Fig. 13B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Embodiment 7, Embodiment 8 and Embodiment 9 are as shown Fig. 13C As shown in , it shows the change in magnification of light of different wavelengths when imaging. Fig.13A , Fig. 13B and Fig. 13C It can be seen that the optical imaging lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment can all achieve good imaging quality.

[0130] In summary, in Examples 1 to 9, the total length TTL of the optical imaging lens, the center distance TD from the object side surface of the first lens E1 to the image side surface of the seventh lens E7 in the optical axis direction, the half of the maximum field of view HFOV of the optical imaging lens, the aperture coefficient Fno of the optical imaging lens, the effective focal length f of the optical imaging lens, and the effective focal lengths f6 and f7 of the sixth lens E6 and the seventh lens E7 in the optical imaging lens are respectively shown in Table 7 below.

[0131] Table 7: System optical parameters of optical imaging lens

[0132] In addition, the black object structure parameters of the optical imaging lens in Embodiment 1 to Embodiment 9 are specifically shown in Table 8.

[0133] Table 8: Black object structure parameter table of optical imaging lens

[0134] In summary, the optical imaging lenses in Embodiments 1 to 9 satisfy the relationship shown in Table 9, as shown in Table 9.

[0135] Table 9: Relationships satisfied by optical imaging lenses

[0136] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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.

[0137] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An optical imaging lens, characterized in that: include: A lens barrel and a lens group and a spacer assembly contained in the lens barrel; the lens group comprises: a first lens with negative optical power, a second lens with negative optical power, a third lens with negative 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 positive optical power, which are arranged in sequence from the object side to the image side along the optical axis; wherein the object side surface and the image side surface of the first lens are convex and concave respectively; the object side surface and the image side surface of the second lens are convex and concave respectively; the object side surface and the image side surface of the third lens are convex and concave respectively; the object side surface and the image side surface of the fourth lens are concave and convex respectively concave surface and convex surface; the object side surface and image side surface of the fifth lens are both convex surfaces; the object side surface and image side surface of the sixth lens are both concave surfaces; the object side surface and image side surface of the seventh lens are both convex surfaces, and the image side surface of the fifth lens is glued to the object side surface of the sixth lens; the spacing component includes a second spacing element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacing element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacing element placed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the optical imaging lens satisfies: -5.60<f6 / f×tan(FOV / 4)≤-4.90; and 2.40≤CP6 / T67<3.45; Among them, f6 is the effective focal length of the sixth lens, f is the effective focal length of the optical imaging lens, FOV is the maximum field of view of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 2.35<(CT5+CT6) / CP6<3.20; Among them, CT5 is the center thickness of the fifth lens on the optical axis, CT6 is the center thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacing element.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.30<(T67+CT7) / CP6<2.05; Wherein, T67 is the air spacing between the centers of the sixth lens and the seventh lens in the optical axis direction, CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacing element.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.55mm -1 ≤N6 / (D6s-d6s)<2.85mm -1 ; Wherein, N6 is the material refractive index of the sixth lens, D6s is the object side outer diameter of the sixth spacing element, and d6s is the object side inner diameter of the sixth spacing element.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 6.80<d6s / (T56+CT6)<8.75; Wherein, d6s is the object side inner diameter of the sixth spacer element, T56 is the air spacing between the centers of the fifth lens and the sixth lens in the optical axis direction, and CT6 is the center thickness of the sixth lens on the optical axis.

6. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 2.65<R13 / (D6m-d6m)<6.50; Among them, R13 is the curvature radius of the object side of the seventh lens, D6m is the image side outer diameter of the sixth spacing element, and d6m is the image side inner diameter of the sixth spacing element.

7. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: -13.60≤R14 / (D0m-d0m)<-3.20; Among them, R14 is the curvature radius of the image side surface of the seventh lens, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

8. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.80<d0m / f7<2.35; Wherein, d0m is the image side inner diameter of the lens barrel, and f7 is the effective focal length of the seventh lens.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.00<BFL / (D0m-d0m)≤1.95; Wherein, BFL is the distance from the image side surface of the seventh lens to the imaging surface, D0m is the image side outer diameter of the lens barrel, and d0m is the image side inner diameter of the lens barrel.

10. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.20<EP02 / EP23≤2.45; Among them, EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacing element, and EP23 is the distance from the image side surface of the second spacing element to the object side surface of the third spacing element.

11. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 0.90<(D6s-d6s) / (D6m-d6m)<2.55; Wherein, D6s is the object side outer diameter of the sixth spacing element, d6s is the object side inner diameter of the sixth spacing element, D6m is the image side outer diameter of the sixth spacing element, and d6m is the image side inner diameter of the sixth spacing element.

12. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 3.90<d6s / CP6<5.15; Wherein, d6s is the object side inner diameter of the sixth spacing element, and CP6 is the maximum thickness of the sixth spacing element.

13. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: -1.45<T23 / (d3s-d2s)<-1.05; Wherein, T23 is the air space between the centers of the second lens and the third lens in the optical axis direction, d3s is the object side inner diameter of the third spacing element, and d2s is the object side inner diameter of the second spacing element.

14. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 0.75<(EP23+CP3) / T34<1.05; Among them, EP23 is the distance from the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, and T34 is the air gap between the centers of the third lens and the fourth lens in the optical axis direction.

15. The optical imaging lens according to claim 2, wherein: The optical imaging lens meets the following requirements: 1.05≤CT7 / CP6<1.65; Wherein, CT7 is the center thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the six spacer elements.

16. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 5.50≤L / CT7<7.25; Wherein, L is the distance from the object side surface to the image side surface of the lens barrel, and CT7 is the center thickness of the seventh lens on the optical axis.

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