Optical imaging lens

Abstract

The present application provides an optical imaging lens, comprising: a lens barrel, and a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a negative focal power, a second lens with a negative focal power, a third lens with a negative focal power, a fourth lens with a positive focal power, a fifth lens with a positive focal power, a sixth lens with a negative focal power, and a seventh lens with a positive focal power; the image side surface of the fifth lens is cemented to the object side surface of the sixth lens; the spacer assembly includes a second spacer element disposed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element disposed 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.

Description

Technical Field

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

[0002] With the development of short videos, people have higher and higher requirements for shooting, and shooting means such as action 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, and now the lenses also need to take into account the photographing function. While strengthening the imaging quality of the lens, the obstacle avoidance effect can also be improved. At present, some existing ultra-wide-angle lenses have chromatic aberration problems, and it is difficult to take into account the color resolution of the lens while meeting the requirements of ultra-wide-angle shooting, resulting in a low imaging level. Summary of the Invention

[0003] An advantage of the present application is to provide an optical imaging lens, which can improve the chromatic aberration of the optical imaging lens by gluing two lenses while meeting the requirements of ultra-wide-angle shooting, improve the color resolution of the wide-angle lens, and improve the overall level of the lens.

[0004] The present application provides an optical imaging lens, including: a lens barrel and a lens group and a spacer assembly accommodated within the lens barrel; the lens group includes, in order from the object side to the image side along the optical axis: 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; wherein, the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the second lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the third lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the fourth lens are a concave surface and a convex surface 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 spacer assembly includes a second spacer element disposed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element disposed 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:

[0005] -5.60 < f6 / f × tan(FOV / 4) ≤ -4.90; and

[0006] 2.40 ≤ CP6 / T67 < 3.45;

[0007] 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 angle of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air gap between the centers of the sixth lens and the seventh lens in the optical axis direction.

[0008] According to some embodiments of the present application, the optical imaging lens satisfies:

[0009] 2.35 < (CT5 + CT6) / CP6 < 3.20;

[0010] Wherein, CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0011] According to some embodiments of the present application, the optical imaging lens satisfies:

[0012] 1.30 < (T67 + CT7) / CP6 < 2.05;

[0013] Wherein, T67 is the air gap between the centers of the sixth lens and the seventh lens in the optical axis direction, CT7 is the central thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0014] According to some embodiments of the present application, the optical imaging lens satisfies:

[0015] 1.55mm -1 ≤ N6 / (D6s - d6s) < 2.85mm -1 ;

[0016] Wherein, N6 is the refractive index of the material of the sixth lens, 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.

[0017] According to some embodiments of the present application, the optical imaging lens satisfies:

[0018] 6.80 < d6s / (T56 + CT6) < 8.75;

[0019] Wherein, d6s is the inner diameter of the object side of the sixth spacer element, T56 is the air gap between the centers of the fifth lens and the sixth lens in the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis.

[0020] According to some embodiments of the present application, the optical imaging lens satisfies:

[0021] 2.65 < R13 / (D6m - d6m) < 6.50;

[0022] Wherein, R13 is the radius of curvature of the object side surface 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.

[0023] According to some embodiments of the present application, the optical imaging lens satisfies:

[0024] -13.60 ≤ R14 / (D0m - d0m) < -3.20;

[0025] 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.

[0026] According to some embodiments of the present application, the optical imaging lens satisfies:

[0027] 1.80 < d0m / f7 < 2.35;

[0028] Wherein, d0m is the image-side inner diameter of the lens barrel, and f7 is the effective focal length of the seventh lens.

[0029] According to some embodiments of the present application, the optical imaging lens satisfies:

[0030] 1.00 < BFL / (D0m - d0m) ≤ 1.95;

[0031] 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.

[0032] According to some embodiments of the present application, the optical imaging lens satisfies:

[0033] 1.20 < EP02 / EP23 ≤ 2.45;

[0034] Wherein, EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacer element, and EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element.

[0035] According to some embodiments of the present application, the optical imaging lens satisfies:

[0036] 0.90 < (D6s - d6s) / (D6m - d6m) < 2.55;

[0037] 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.

[0038] According to some embodiments of the present application, the optical imaging lens satisfies:

[0039] 3.90 < d6s / CP6 < 5.15;

[0040] wherein, d6s is the object-side inner diameter of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0041] According to some embodiments of the present application, the optical imaging lens satisfies:

[0042] -1.45 < T23 / (d3s - d2s) < -1.05;

[0043] 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 spacer element, and d2s is the object-side inner diameter of the second spacer element.

[0044] According to some embodiments of the present application, the optical imaging lens satisfies:

[0045] 0.75 < (EP23 + CP3) / T34 < 1.05;

[0046] 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 gap between the centers of the third lens and the fourth lens in the optical axis direction.

[0047] According to some embodiments of the present application, the optical imaging lens satisfies:

[0048] 1.05 ≤ CT7 / CP6 < 1.65;

[0049] wherein, CT7 is the central thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the six spacer elements.

[0050] According to some embodiments of the present application, the optical imaging lens satisfies:

[0051] 5.50 ≤ L / CT7 < 7.25;

[0052] wherein, L is the interval from the object side surface to the image side surface of the lens barrel, and CT7 is the central thickness of the seventh lens on the optical axis.

[0053] In summary, the optical imaging lens of the present application is a seven-element ultra-wide-angle large-aperture mobile phone lens. By designing the fifth lens and the sixth lens to be in a cemented state, the chromatic aberration problem of the ultra-wide-angle lens is improved, the color resolution of the lens is enhanced, and the overall performance of the lens is elevated. However, considering the characteristics of the cemented lens, since the fifth lens is a convex lens, the sixth lens must be a concave lens with a negative optical power to cooperate with the fifth lens to adjust chromatic dispersion. Meanwhile, to meet the focal length requirements, the seventh lens must be a convex lens with a positive optical power, which results in a relatively short center distance and a relatively long marginal distance along the optical axis between the sixth lens and the seventh lens. Therefore, a thick spacer element needs to be inserted between the abutting positions of the sixth lens and the seventh lens. The above relationship reflects that the relative ratio of the marginal gap to the center gap of the image plane between the sixth lens and the seventh lens is within a reasonable range, enabling the lens to have both good imaging quality and chromatic aberration elimination. When this ratio is larger, the marginal gap of the lens becomes larger, the center gap becomes smaller, and the adjacent curvature radii become smaller, leading to the dispersion of the light rays and a larger blur circle of the light rays in the outer field of view of the lens, resulting in poorer imaging quality and potentially causing image blurring in the outer field of view of the lens. When this ratio is smaller, the marginal gap of the lens becomes smaller, the center gap becomes larger, and the adjacent curvature radii are closer, leading to a poorer chromatic aberration elimination effect of the cemented lens and potentially causing rainbow edges or a large area of the image to be biased towards red or purple in the outer field of view of the lens. 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

[0054] Figure 1 is a schematic diagram of the structural parameters of an optical imaging lens according to an embodiment of the present application;

[0055] Figure 2 is a schematic diagram of the structure of the optical imaging lens according to Embodiment 1 of the present application;

[0056] Figure 3 is a schematic diagram of the structure of the optical imaging lens according to Embodiment 2 of the present application;

[0057] Figure 4 is a schematic diagram of the structure of the optical imaging lens according to Embodiment 3 of the present application;

[0058] Figure 5A shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0059] Figure 5B shows a schematic diagram of the astigmatism curve of the optical imaging lens according to Embodiment 1, Embodiment 2, and Embodiment 3 of the present application;

[0060] Figure 5CShows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to the first, second, and third embodiments of the present application;

[0061] Figure 6 Is a schematic structural diagram of the optical imaging lens according to the fourth embodiment of the present application;

[0062] Figure 7 Is a schematic structural diagram of the optical imaging lens according to the fifth embodiment of the present application;

[0063] Figure 8 Is a schematic structural diagram of the optical imaging lens according to the sixth embodiment of the present application;

[0064] Figure 9A Shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to the fourth, fifth, and sixth embodiments of the present application;

[0065] Figure 9B Shows a schematic diagram of the astigmatism curve of the optical imaging lens according to the fourth, fifth, and sixth embodiments of the present application;

[0066] Figure 9C Shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to the fourth, fifth, and sixth embodiments of the present application;

[0067] Figure 10 Is a schematic structural diagram of the optical imaging lens according to the seventh embodiment of the present application;

[0068] Figure 11 Is a schematic structural diagram of the optical imaging lens according to the eighth embodiment of the present application;

[0069] Figure 12 Is a schematic structural diagram of the optical imaging lens according to the ninth embodiment of the present application;

[0070] Figure 13A Shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to the seventh, eighth, and ninth embodiments of the present application;

[0071] Figure 13B Shows a schematic diagram of the astigmatism curve of the optical imaging lens according to the seventh, eighth, and ninth embodiments of the present application;

[0072] Figure 13C Shows a schematic diagram of the longitudinal chromatic aberration curve of the optical imaging lens according to the seventh, eighth, and ninth embodiments of the present application;

[0073] Figure 14The figure shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 1.8 is satisfied;

[0074] Figure 15 The figure shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 2.73 is satisfied;

[0075] Figure 16 The figure shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 3.11 is satisfied;

[0076] Figure 17 The figure shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 3.92 is satisfied. Detailed implementation manners

[0077] To better understand the present application, more detailed descriptions of various aspects of the present application will be made 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 do not 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.

[0078] It should be noted that in this specification, the expressions such as first, second, and third are only used to distinguish one feature from another feature and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0079] In the drawings, for the sake of convenience of illustration, the thickness, size, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0080] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be made according to the general methods in the art. For example, the positive or negative of the R value (R refers to the radius of curvature in the paraxial region) is used to determine the convexity and concavity. In this article, the surface of each lens closest to the object to be photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface 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.

[0081] It should also be understood that the terms "comprising", "comprises", "having", "includes" and / or "including", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. Further, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features and not a single element in the list. Further, when describing embodiments of the present application, the use of "may" means "one or more embodiments of the present application". Also, the term "exemplary" is intended to refer to an example or illustration.

[0082] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0083] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The following embodiments merely represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but should not be construed as a limitation on the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, 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 drawings and in conjunction with the embodiments.

[0084] According to one aspect of the present application, as Figure 1As shown, an embodiment of the present application provides an optical imaging lens, which may include a lens barrel and a lens group and a spacer component accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a negative optical power, a second lens with a negative optical power, a third lens with a negative optical power, a fourth lens with a positive optical power, a fifth lens with a positive optical power, a sixth lens with a negative optical power, and a seventh lens with a positive optical power; wherein, the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the second lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the third lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the fourth lens are a concave surface and a convex surface 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 cemented to the object side surface of the sixth lens; the spacer component includes a second spacer element disposed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a sixth spacer element disposed between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens.

[0085] In particular, the optical imaging lens satisfies: -5.60 < f6 / f × tan(FOV / 4) ≤ -4.90; and 2.40 ≤ CP6 / T67 < 3.45; where 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 angle of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air gap between the centers of the sixth lens and the seventh lens in the optical axis direction.

[0086] It should be noted 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 cemented state, the chromatic aberration problem of the ultra-wide-angle lens is improved, the color resolution of the lens is enhanced, and the overall performance of the lens is elevated. However, considering the characteristics of the cemented lens, since the fifth lens is a convex lens, the sixth lens must be a concave lens with negative optical power to cooperate with the fifth lens to adjust chromatic dispersion. Meanwhile, to meet the focal length requirements, the seventh lens must be a convex lens with positive optical power. As a result, the central distance between the sixth lens and the seventh lens along the optical axis is short, and the marginal distance along the optical axis is long. Therefore, a thick spacer element needs to be inserted between the abutting positions of the sixth lens and the seventh lens. The above relationship reflects that the relative ratio of the marginal gap to the central gap of the image plane between the sixth lens and the seventh lens is within a reasonable range, enabling the lens to have both good imaging quality and chromatic aberration elimination. When this ratio is larger, the marginal gap of the lens becomes larger, the central gap becomes smaller, and the adjacent curvature radii become smaller, resulting in the light rays becoming more dispersed. The dispersion spot of the light rays in the outer field of view of the lens is larger, and the imaging quality is poorer, which may further cause image blurring in the outer field of view of the lens. When this ratio is smaller, the marginal gap of the lens becomes smaller, the central gap becomes larger, and the adjacent curvature radii are closer, leading to a worse chromatic aberration elimination effect for the cemented lens, and may further cause rainbow edges or a large area of the image to be reddish or purplish in the outer field of view of the lens. Therefore, by controlling this ratio within a reasonable range, the lens can have both good imaging quality and chromatic aberration elimination.

[0087] Exemplarily, Figure 14 shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 1.8 is satisfied; Figure 15 shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 2.73 is satisfied; Figure 16 shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 3.11 is satisfied; Figure 17 shows a spot diagram of the optical imaging lens when the relationship CP6 / T67 = 3.92 is satisfied. As can be seen from Figure 15 and Figure 16 , when the relationship CP6 / T67 is within the range greater than 2.10 and less than or equal to 3.41, at the main wavelength of 0.555 μm, the distribution of the dispersion spots at the 0F, 0.46F, 0.88F, and 1.0F fields of view is as shown in Figure 15 and Figure 16 . The dispersion spots in the spot diagram are within an acceptable range, and the optical imaging lens can balance imaging quality and chromatic aberration elimination. As can be seen from Figure 14 , when the relationship CP6 / T67 is within the range less than 2.10, at the main wavelength of 0.555 μm, the distribution of the dispersion spots at the 0F, 0.46F, 0.88F, and 1.0F fields of view is as shown inFigure 14 As shown, the blur spot in the light spot schematic diagram is too large, indicating that the ratio of CP6 / T67 is too small, the edge gap of the lens is too small, the central gap is too large, and the adjacent curvature radii are too close, resulting in a poor effect of eliminating chromatic aberration of the cemented lens. From Figure 17 it can be known that when the relational expression CP6 / T67 is in the range greater than 3.41, in the case of the main wavelength of 0.555 μm, the distribution of the blur spots at the 0F, 0.46F, 0.88F, and 1.0F fields of view is as Figure 17 shown. The blur spot in the light spot schematic diagram is too large, indicating that the ratio of CP6 / T67 is too large, the edge gap of the lens is too large, the central gap is too small, and the adjacent curvature radii are too small, resulting in the light becoming dispersed and a poor imaging effect.

[0088] Preferably, the optical imaging lens satisfies: -5.56 ≤ f6 / f × tan(FOV / 4) ≤ -4.90; and 2.40 ≤ CP6 / T67 ≤ 3.43.

[0089] 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 a positive optical power, and the second is a lens with a negative optical power. Only when the two lenses are cemented together can the purpose of correcting the chromatic aberration of the optical imaging lens be achieved. And according to some embodiments of the present application, the optical imaging lens satisfies: 2.35 < (CT5 + CT6) / CP6 < 3.20; where CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0090] In this way, by controlling the central thicknesses of the two fifth lenses and the sixth lens within the above relational expression range, it is possible to ensure the effective chromatic aberration correction effect of the lens and the feasibility of lens production and manufacturing. At the same time, by reasonably controlling the maximum thickness of the sixth spacer element, the light rays emitted from the sixth lens can be converged onto the image plane, reducing the blur spot and improving the imaging quality.

[0091] Preferably, the optical imaging lens satisfies: 2.39 ≤ (CT5 + CT6) / CP6 ≤ 3.18.

[0092] According to some embodiments of the present application, the optical imaging lens satisfies: 1.30 < (T67 + CT7) / CP6 < 2.05; where T67 is the air gap between the centers of the sixth lens and the seventh lens in the optical axis direction, CT7 is the central thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0093] Thus, due to the principle of the cemented lens for correcting chromatic aberration, the sixth lens must be a negative focal length lens. By controlling the above relationship, the marginal rays of the sixth lens are converged and can be accurately focused on the theoretical image plane, reducing the defocus distance of the marginal optical field and improving the imaging quality of the lens. At the same time, it can prevent interference between the effective diameter surfaces of the lenses in the optical axis direction after assembly, avoid problems such as abnormal appearance and performance of the lens, and improve the yield of appearance and performance.

[0094] Preferably, the optical imaging lens satisfies: 1.34 ≤ (T67 + CT7) / CP6 ≤ 2.03.

[0095] According to some embodiments of the present application, the optical imaging lens satisfies: 1.55mm -1 ≤ N6 / (D6s - d6s) < 2.85mm -1 ; where N6 is the refractive index of the material of the sixth lens, D6s is the object-side outer diameter of the sixth spacer element, and d6s is the object-side inner diameter of the sixth spacer element.

[0096] Thus, since the sixth lens is a negative focal length lens, by controlling the above relationship, the light dispersion can be weakened, the excess light can be blocked and absorbed, and the formation of stray light due to the reflection of light between the lenses can be avoided, improving the imaging quality of the lens.

[0097] Preferably, the optical imaging lens satisfies: 1.56mm -1 ≤ N6 / (D6s - d6s) ≤ 2.84mm -1 .

[0098] According to some embodiments of the present application, the optical imaging lens satisfies: 6.80 < d6s / (T56 + CT6) < 8.75; where d6s is the object-side inner diameter of the sixth spacer element, T56 is the air gap between the centers of the fifth lens and the sixth lens in the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis.

[0099] Thus, since the air gap between the fifth lens and the sixth lens has a great influence on the correction effect of the chromatic aberration of this pair of cemented lenses on the lens, by controlling the above relationship, the emission angle of the light rays from the sixth lens can be affected, and the light rays with an excessive angle can be blocked without affecting the normal light rays, reducing the generation of stray light.

[0100] Preferably, the optical imaging lens satisfies: 6.83 ≤ d6s / (T56 + CT6) ≤ 8.73.

[0101] According to some embodiments of the present application, the optical imaging lens satisfies: 2.65 < R13 / (D6m - d6m) < 6.50; where R13 is the radius of curvature of the object side surface of the seventh lens, D6m is the outer diameter of the image side of the sixth spacer element, and d6m is the inner diameter of the image side of the sixth spacer element.

[0102] In this way, since the seventh lens is a convex lens with positive optical power, the radius of curvature of the object side surface of the seventh lens determines that the flange portion for the assembly and abutment of the seventh lens will be relatively far from the flange abutment portion of the sixth lens. Therefore, by controlling the above relationship, the abutment 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 thus the reliability quality of the lens can be enhanced.

[0103] Preferably, the optical imaging lens satisfies: 2.67 ≤ R13 / (D6m - d6m) ≤ 6.48.

[0104] According to some embodiments of the present application, the optical imaging lens satisfies: -13.60 ≤ R14 / (D0m - d0m) < -3.20; where R14 is the radius of curvature of the image side surface of the seventh lens, D0m is the outer diameter of the image side of the lens barrel, and d0m is the inner diameter of the image side of the lens barrel.

[0105] In this way, since the seventh lens is the last lens of the lens image plane, by controlling the above relationship, the effective diameter region 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 scratching and damaging the lens during the lens assembly and use process, and improve the production yield of the lens. It can also ensure the rigid structural strength of the lens while leaving a certain space for dispensing and bonding the seventh lens to the lens barrel, and the space reserved according to the above relationship can ensure that sufficient and stable glue amount can be set, so that the lens does not fail in the reliability experiment, further improving the reliability requirements of the lens.

[0106] Preferably, the optical imaging lens satisfies: -13.60 ≤ R14 / (D0m - d0m) ≤ -3.24.

[0107] According to some embodiments of the present application, the optical imaging lens satisfies: 1.80 < d0m / f7 < 2.35; where d0m is the inner diameter of the image side of the lens barrel, and f7 is the effective focal length of the seventh lens.

[0108] In this way, by controlling the inner diameter of the image side surface of the lens barrel, it helps to control the glue amount of the glue between the seventh lens and the lens barrel, helps to improve the structural strength of the lens, and can prevent the lens barrel from blocking the effective light rays emitted by the seventh lens, avoiding vignetting during lens imaging and improving the final imaging quality of the lens.

[0109] Preferably, the optical imaging lens satisfies: 1.83 ≤ d0m / f7 ≤ 2.34.

[0110] According to some embodiments of the present application, the optical imaging lens satisfies: 1.00 < BFL / (D0m - d0m) ≤ 1.95; where BFL is the distance from the image side surface of the seventh lens to the imaging surface, D0m is the outer diameter of the image side of the lens barrel, and d0m is the inner diameter of the image side of the lens barrel.

[0111] In this way, the difference between the inner diameter and the outer diameter of the image side 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 while the lens barrel has a certain physical strength, it will not interfere with the positions of the chip and other components due to excessive volume, and can help the module smoothly complete the lens focusing process and ensure the smooth progress of the subsequent processes.

[0112] Preferably, the optical imaging lens satisfies: 1.04 ≤ BFL / (D0m - d0m) ≤ 1.94.

[0113] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20 < EP02 / EP23 ≤ 2.45; where EP02 is the distance between the object side surface of the lens barrel and the object side surface of the second spacer element, and EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element.

[0114] In this way, the functions of the first lens, the second lens, and the third lens of the lens are all 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 shape accuracy after the lenses are molded, improve the imaging quality of the lens, and improve the production yield.

[0115] Preferably, the optical imaging lens satisfies: 1.23 ≤ EP02 / EP23 ≤ 2.45.

[0116] According to some embodiments of the present application, the optical imaging lens satisfies: 0.90 < (D6s - d6s) / (D6m - d6m) < 2.55; where D6s is the outer diameter of the object side of the sixth spacer element, d6s is the inner diameter of the object side of the sixth spacer element, D6m is the outer diameter of the image side of the sixth spacer element, and d6m is the inner diameter of the image side of the sixth spacer element.

[0117] Thus, in the above relationship, (D6s - d6s) and (D6m - d6m) respectively represent the contact areas of the sixth spacer element with the sixth lens and the seventh lens. By reasonably controlling the ratio of (D6s - d6s) to (D6m - d6m), the lens contact can have a certain stability, improving the contact stability of the lens in mechanical reliability tests and enhancing the lens quality.

[0118] Preferably, the optical imaging lens satisfies: 0.91 ≤ (D6s - d6s) / (D6m - d6m) ≤ 2.51.

[0119] According to some embodiments of the present application, the optical imaging lens satisfies: 3.90 < d6s / CP6 < 5.15; where d6s is the object - side inner diameter of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element.

[0120] Thus, 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 contact space can be provided for the sixth lens and the seventh lens, reducing the variation of the field curvature in the outer field of the lens, and also ensuring the blocking of stray light, reducing the entry of redundant light into the seventh lens, and improving the imaging quality.

[0121] Preferably, the optical imaging lens satisfies: 3.90 ≤ d6s / CP6 ≤ 5.12.

[0122] According to some embodiments of the present application, the optical imaging lens satisfies: - 1.45 < T23 / (d3s - d2s) < - 1.05; where 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 spacer element, and d2s is the object - side inner diameter of the second spacer element.

[0123] Thus, since the light is in a converging trend between the second lens and the third lens, by reasonably controlling the inner diameters of the second spacer element and the third spacer element, the ineffective light can be blocked and absorbed, reducing the risk of stray light, and also ensuring the field - of - view angle of the lens, and the light beyond the field - of - view angle can be blocked to ensure the design specifications of the lens.

[0124] Preferably, the optical imaging lens satisfies: - 1.42 ≤ T23 / (d3s - d2s) ≤ - 1.06.

[0125] According to some embodiments of the present application, the optical imaging lens satisfies: 0.75 < (EP23 + CP3) / T34 < 1.05; where 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.

[0126] 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 spacer element can control the curvature radii of the image side of the third lens and the object side of the fourth lens. Controlling the parameters of this part through the above relational expression helps to control the uniformity of the lens thickness of the third lens, making the lens easier to form, and helps to improve the internal stray light between the third lens and the fourth lens.

[0127] Preferably, the optical imaging lens satisfies: 0.76 ≤ (EP23 + CP3) / T34 ≤ 1.03.

[0128] According to some embodiments of the present application, the optical imaging lens satisfies: 1.05 ≤ CT7 / CP6 < 1.65; where CT7 is the central thickness of the seventh lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

[0129] In this way, since the seventh lens is a convex lens with positive optical power, and the sixth spacer element is a spacer element that bears against the sixth lens and the seventh lens, the central thickness of the seventh lens and the thickness of the sixth spacer element will affect the distance between the centers of the two lenses in the optical axis direction. If the distance is too close, the center points of the lenses are more likely to collide during assembly or when the lens is subjected to impact, resulting in lens damage. If the distance is too far, the seventh lens will extend beyond the bottom end surface of the lens barrel, causing problems such as scratches on the outer diameter of the seventh lens during assembly or lens transportation. Controlling the distance between the two lenses through the above relational expression can avoid the occurrence of lens damage.

[0130] Preferably, the optical imaging lens satisfies: 1.05 ≤ CT7 / CP6 ≤ 1.62.

[0131] According to some embodiments of the present application, the optical imaging lens satisfies: 5.50 ≤ L / CT7 < 7.25; where L is the distance from the object side to the image side of the lens barrel, and CT7 is the central thickness of the seventh lens on the optical axis.

[0132] Thus, since the fifth lens and the sixth lens are cemented lenses, the light rays emitted by the cemented lenses are divergent light rays due to their improved dispersion effect, and the proportion of the central 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 rays can be focused on the image plane, improving the clarity of the lens and ensuring the imaging quality of the lens.

[0133] Preferably, the optical imaging lens satisfies: 5.50 ≤ L / CT7 ≤ 7.24.

[0134] 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 thereto. For example, according to needs, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0135] The following describes some specific but non-limiting embodiments of the above embodiments of the present application in more detail with reference to the 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 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, and S14 represents the image side surface of the seventh lens E7. In addition, Aj represents the j-th order aspherical coefficient, where j = 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30.

[0136] Embodiment 1

[0137] As Figure 2As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a negative focal power, a second lens E2 with a negative focal power, a third lens E3 with a negative focal power, a fourth lens E4 with a positive focal power, a fifth lens E5 with a positive focal power, a sixth lens E6 with a negative focal power, and a seventh lens E7 with a positive focal power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface 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 cemented to the object side surface S11 of the sixth lens E6.

[0138] The spacer assembly includes a second spacer element P2 disposed 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 spacer element P3 disposed 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 spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0139] In this embodiment, the spacer assembly further includes a fourth spacer 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, and a fourth auxiliary spacer element P4b disposed between the fourth spacer element P4 and the fifth lens E5 and in contact with the image side surface of the fourth spacer element P4.

[0140] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, wherein the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0141] Table 1: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 1

[0142]

[0143] 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 one lens in the lens group are aspherical surfaces, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0144] ;

[0145] Wherein, x is the sagitta, the distance from the vertex of the aspherical surface, when the aspherical surface is at a position with 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 correction coefficient of the i-th order 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, A30 that can be used for the aspherical mirrors S3 to S6 and S9 to S13 in Example 4.

[0146] Table 2: Aspherical Coefficient Table of the Optical Imaging Lens in Example 1

[0147]

[0148] Example 2

[0149] As Figure 3 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: 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; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface 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 cemented to the object side surface S11 of the sixth lens E6.

[0150] The spacer assembly includes a second spacer 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 spacer 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 spacer 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.

[0151] In this embodiment, the spacer assembly further includes a fourth spacer 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, and a fourth auxiliary spacer element P4b disposed between the fourth spacer element P4 and the fifth lens E5 and in contact with the image side surface of the fourth spacer element P4.

[0152] It should be noted that, compared with the first embodiment above, the optical imaging lens of this second embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this second embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. However, the optical imaging lens of this second embodiment and the optical imaging lens of the first embodiment above have different black object structures, that is, the difference between this second embodiment and the first embodiment above lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different.

[0153] Specifically, the numerical values of the respective relevant structural parameters in this second embodiment and the first embodiment above are shown in Table 8 below. The multiple black object parameters specifically include: the object-side inner diameter d2s of the second spacer element P2; the object-side inner diameter d3s of the third spacer element P3; the object-side outer diameter D6s of the sixth spacer element P6; the object-side inner diameter d6s of the sixth spacer element P6; the image-side outer diameter D6m of the sixth spacer element; the image-side inner diameter d6m of the sixth spacer 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 spacer element P2; the distance EP23 from the image side surface of the second spacer element P2 to the object side surface of the third spacer element P3; the maximum thickness CP3 of the third spacer element P3; the maximum thickness CP6 of the fourth spacer element P6; the spacer L between the object side surface and the image side surface of the lens barrel P0. It can be understood that the unit of the numerical values shown in Table 8 for each parameter is millimeter (mm), and further, the schematic illustration of each parameter in the structural diagram of the optical imaging lens is as Figure 1 shown.

[0154] Embodiment Three

[0155] As Figure 4As shown, in this embodiment, the optical imaging lens includes a lens barrel P0, and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: 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; 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 respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are convex and concave respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are concave and convex respectively; the object side surface S9 and the image side surface S10 of the fifth lens E5 are both convex; the object side surface S11 and the image side surface S12 of the sixth lens E6 are both concave; the object side surface S13 and the image side surface S14 of the seventh lens E7 are both convex, and the image side surface S10 of the fifth lens E5 is cemented to the object side surface S11 of the sixth lens E6.

[0156] The spacer assembly includes a second spacer 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 spacer 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 spacer 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.

[0157] In this embodiment, the spacer assembly further includes a fourth spacer 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.

[0158] It should be noted that, compared with the above-mentioned Embodiment 1, the optical imaging lens of this Embodiment 3 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this Embodiment 3 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. And the optical imaging lens of this Embodiment 3 has a different black object structure from the optical imaging lens of the above-mentioned Embodiment 1, that is, the difference between this Embodiment 3 and the above-mentioned Embodiment 1 lies in: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this Embodiment 3 are shown in Table 8 later, and the specific descriptions of multiple black object parameters are the same as the relevant descriptions in Embodiment 2 above, which will not be elaborated here.

[0159] After simulation tests: the axial chromatic aberration curves of the optical imaging lenses in Embodiment 1, Embodiment 2, and Embodiment 3 are as Figure 5AAs shown, it represents the deviation degree of the focus points of light rays with different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5B shown, which represents the curvature degree of the meridional image plane and the curvature degree of the sagittal image plane; the longitudinal chromatic aberration curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5C shown, which represents the change in the magnification of light rays with different wavelengths during imaging. According to Figure 5A , Figure 5B and Figure 5C it can be known that the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment can all achieve good imaging quality.

[0160] The fourth embodiment

[0161] As Figure 6 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer component accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a negative optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface 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.

[0162] The spacer component includes a second spacer 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 spacer 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 spacer 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.

[0163] In this embodiment, the spacer component further includes a third auxiliary spacer element P3b placed 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.

[0164] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0165] Table 3: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 4

[0166]

[0167] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side and the image side of any one lens in the lens group are both aspherical surfaces, and the surface shapes of the aspherical lenses can be defined by the aspherical formula given in Embodiment 1 above. Table 4 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical surfaces S3 to S6 and S9 to S13 in Embodiment 4.

[0168] Table 4: Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment 4

[0169]

[0170] Embodiment 5

[0171] As Figure 7 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, in order from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a negative optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side S1 and the image side S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side S3 and the image side S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side S5 and the image side S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side S7 and the image side S8 of the fourth lens E4 are a concave surface and a convex surface respectively; the object side S9 and the image side S10 of the fifth lens E5 are both convex surfaces; the object side S11 and the image side S12 of the sixth lens E6 are both concave surfaces; the object side S13 and the image side S14 of the seventh lens E7 are both convex surfaces, and the image side S10 of the fifth lens E5 is cemented to the object side S11 of the sixth lens E6.

[0172] The spacer assembly includes a second spacer element P2 disposed 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 spacer element P3 disposed 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 spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0173] 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.

[0174] It should be noted that, compared with the above Embodiment 4, the optical imaging lens of this Embodiment 5 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this Embodiment 5 is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of this Embodiment 5 and the optical imaging lens of the above Embodiment 4 have different black object structures, that is, the difference between this Embodiment 5 and the above Embodiment 4 lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this Embodiment 5 are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in Embodiment 2 above, and will not be elaborated here.

[0175] Embodiment 6

[0176] As Figure 8 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in order from the object side to the image side along the optical axis: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a negative optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are convex and concave surfaces 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 cemented to the object side surface S11 of the sixth lens E6.

[0177] The spacer assembly includes a second spacer element P2 disposed 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 spacer element P3 disposed 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 spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0178] In this embodiment, the spacer assembly further includes a fourth spacer 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.

[0179] It should be noted that, compared with the above-mentioned Embodiment 4, the optical imaging lens of this Embodiment 6 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this Embodiment 6 is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of this Embodiment 6 and the optical imaging lens of the above-mentioned Embodiment 4 have different black object structures, that is, the difference between this Embodiment 6 and the above-mentioned Embodiment 4 lies in that: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the numerical values of each relevant structural parameter in this Embodiment 6 are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the above-mentioned Embodiment 2, and will not be repeated here.

[0180] After simulation tests: the axial chromatic aberration curves of the optical imaging lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as Figure 9A shown, which represents the degree of deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as Figure 9B shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the lateral chromatic aberration curves of the optical imaging lenses in Embodiment 4, Embodiment 5, and Embodiment 6 are as Figure 9C shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to Figure 9A , Figure 9B and Figure 9C it can be seen that the optical imaging lenses in Embodiment 4, Embodiment 5, and Embodiment 6 can all achieve good imaging quality.

[0181] Embodiment 7

[0182] As Figure 10As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens E1 with negative focal power, a second lens E2 with negative focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with positive focal power, a sixth lens E6 with negative focal power, and a seventh lens E7 with positive focal power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface 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.

[0183] The spacer assembly includes a second spacer 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 spacer 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 spacer 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.

[0184] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b placed 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.

[0185] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment VII, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0186] Table 5: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment VII

[0187]

[0188] In this embodiment, except for the first lens E1 and the fourth lens E4, the object side and the image side of any lens in the lens group are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in the first embodiment above. Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 for the aspherical surfaces S3 to S6 and S9 to S13 in the fourth embodiment.

[0189] Table 6: Aspherical Coefficient Table of the Optical Imaging Lens in the Seventh Embodiment

[0190]

[0191] Embodiment Eight

[0192] As Figure 11 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in order from the object side to the image side along the optical axis: a first lens E1 with a negative focal power, a second lens E2 with a negative focal power, a third lens E3 with a negative focal power, a fourth lens E4 with a positive focal power, a fifth lens E5 with a positive focal power, a sixth lens E6 with a negative focal power, and a seventh lens E7 with a positive focal power; wherein, the object side S1 and the image side S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side S3 and the image side S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side S5 and the image side S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side S7 and the image side S8 of the fourth lens E4 are a concave surface and a convex surface respectively; the object side S9 and the image side S10 of the fifth lens E5 are both convex surfaces; the object side S11 and the image side S12 of the sixth lens E6 are both concave surfaces; the object side S13 and the image side S14 of the seventh lens E7 are both convex surfaces, and the image side S10 of the fifth lens E5 is cemented to the object side S11 of the sixth lens E6.

[0193] The spacer assembly includes a second spacer element P2 placed between the second lens E2 and the third lens E3 and in contact with the image side of the second lens E2, a third spacer element P3 placed between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3, and a sixth spacer element P6 placed between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6.

[0194] In this embodiment, the spacer assembly further includes a third auxiliary spacer element P3b placed between the third spacer element P3 and the fourth lens E4 and in contact with the image side of the third spacer element P3.

[0195] It should be noted that, compared with the seventh embodiment above, the optical imaging lens of this eighth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this eighth embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The optical imaging lens of this eighth embodiment and the optical imaging lens of the seventh embodiment above have different black object structures, that is, the difference between this eighth embodiment and the seventh embodiment above lies in 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 numerical values of the respective relevant structural parameters in this eighth embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0196] Embodiment Nine

[0197] As Figure 12 shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens E1 with a negative optical power, a second lens E2 with a negative optical power, a third lens E3 with a negative optical power, a fourth lens E4 with a positive optical power, a fifth lens E5 with a positive optical power, a sixth lens E6 with a negative optical power, and a seventh lens E7 with a positive optical power; wherein, the object side surface S1 and the image side surface S2 of the first lens E1 are a convex surface and a concave surface respectively; the object side surface S3 and the image side surface S4 of the second lens E2 are a convex surface and a concave surface respectively; the object side surface S5 and the image side surface S6 of the third lens E3 are a convex surface and a concave surface respectively; the object side surface S7 and the image side surface S8 of the fourth lens E4 are a concave surface and a convex surface 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 cemented to the object side surface S11 of the sixth lens E6.

[0198] The spacer assembly includes a second spacer element P2 disposed 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 spacer element P3 disposed 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 spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side surface of the sixth lens E6.

[0199] In this embodiment, the spacer assembly further includes a fourth spacer 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.

[0200] It should be noted that, compared with the seventh embodiment above, the optical imaging lens of this ninth embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this 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 this ninth embodiment and the optical imaging lens of the seventh embodiment above have different black object structures, that is, the difference between this ninth embodiment and the seventh embodiment above lies in: the dimensional values of some structural parameters of the lens barrel and the spacer assembly in the optical imaging lens are different. Specifically, the values of each relevant structural parameter in this ninth embodiment are shown in Table 8 below. The specific descriptions of multiple black object parameters are the same as the relevant descriptions in the second embodiment above and will not be elaborated here.

[0201] Through simulation tests: the axial chromatic aberration curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13A shown, which represents the degree of deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13B shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the lateral chromatic aberration curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13C shown, which represents the change in the magnification of light rays of different wavelengths during imaging. According to Figure 13A , Figure 13B and Figure 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.

[0202] In summary, in Embodiments 1 to 9, the total length TTL of the optical imaging lens, the central distance TD in the optical axis direction from the object side of the first lens E1 to the image side of the seventh lens E7, half of the maximum field of view angle 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 shown in Table 7 below respectively.

[0203] Table 7: System Optical Parameter Table of the Optical Imaging Lens

[0204]

[0205] In addition, the black object structure parameters of the optical imaging lenses in Embodiments 1 to 9 are specifically shown in Table 8.

[0206] Table 8: Black Object Structure Parameter Table of the Optical Imaging Lens

[0207]

[0208] In summary, the optical imaging lenses in Embodiments 1 to 9 satisfy the relational expressions shown in Table 9, as specifically shown in Table 9.

[0209] Table 9: Table of Relational Expressions Satisfied by the Optical Imaging Lens

[0210]

[0211] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as within the scope described in this specification.

[0212] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An optical imaging lens, characterized in that, Comprising: A lens barrel and a lens group and a spacer component accommodated within the lens barrel; the lens group includes, arranged in sequence from the object side to the image side along the optical axis: a first lens with a negative optical power, a second lens with a negative optical power, a third lens with a negative optical power, a fourth lens with a positive optical power, a fifth lens with a positive optical power, a sixth lens with a negative optical power, and a seventh lens with a positive optical power; wherein, the object side surface and the image side surface of the first lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the second lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the third lens are a convex surface and a concave surface respectively; the object side surface and the image side surface of the fourth lens are a concave surface and a convex surface 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 cemented to the object side surface of the sixth lens; the spacer component includes a second spacer element placed between the second lens and the third lens and in contact with the image side surface of the second lens, a third spacer 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 spacer 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; 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 angle of the optical imaging lens, CP6 is the maximum thickness of the sixth spacer element, and T67 is the air gap 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 satisfies: 2.35 < (CT5 + CT6) / CP6 < 3.20; wherein, CT5 is the central thickness of the fifth lens on the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, and CP6 is the maximum thickness of the sixth spacer element.

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

4. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.55 mm -1 ≤ N6 / (D6s - d6s) < 2.85 mm -1 ; wherein, N6 is the refractive index of the material of the sixth lens, 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.

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

6. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 2.65 < R13 / (D6m - d6m) < 6.50; Wherein, R13 is the radius of curvature of the object side surface 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.

7. The optical imaging lens according to claim 1, characterized in that 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.

8. The optical imaging lens according to claim 1, wherein 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.

9. The optical imaging lens according to claim 1, wherein, 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.

10. The optical imaging lens according to claim 1, characterized in that, 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 spacer element, and EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element.

11. The optical imaging lens according to claim 1, wherein 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.

12. The optical imaging lens according to claim 1, wherein 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.

13. The optical imaging lens according to claim 1, wherein 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 spacer element, and d2s is the object-side inner diameter of the second spacer element.

14. The optical imaging lens according to claim 1, characterized in that, 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 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, characterized in that, The optical imaging lens satisfies: 1.05 ≤ CT7 / CP6 < 1.65; Wherein, CT7 is the central 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 satisfies: 5.50 ≤ L / CT7 < 7.25; Wherein, L is the distance between the object side surface and the image side surface of the lens barrel, and CT7 is the central thickness of the seventh lens on the optical axis.

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