Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a spacing assembly, wherein the lens group and the spacing assembly are accommodated in the lens barrel; the lens group comprises a first lens with negative focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power and a fifth lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis. The sixth lens has positive focal power; the seventh lens has negative focal power; 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, and a third spacing element which is arranged on the image side of the third lens and is in contact with the image side surface of the third lens; the optical imaging lens satisfies the following conditions: 7.69 mm < = f * tan (HFOV) < = 9.27 mm, and 33.65 < EP23 / T23 < 59.35.

Description

Technical Field

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

[0002] With the continuous improvement of consumers' requirements for shooting experience, the demand for handheld shooting devices such as action cameras in the market shows a significant growth trend. Such products have portability, high flexibility, and excellent shooting performance, and can meet the needs of users such as photography enthusiasts, outdoor sports enthusiasts, and professional photographers. As the core component of an action camera, the performance of the main camera lens directly determines the quality of the captured image and the user experience. However, in order to pursue high-quality shooting performance, the existing main camera lenses on the market are often relatively large in size, which to a certain extent limits the portability of the products. Summary of the Invention

[0003] One advantage of this application is to provide an optical imaging lens, which can achieve lens miniaturization through a more compact structural design while ensuring high performance of the lens, meeting the high-quality shooting requirements and ensuring the portability of the product, and further improving the user's shooting experience.

[0004] This 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, arranged in sequence from the object side to the image side along the optical axis: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power; the object side surface and the image side surface of the first lens are concave and convex respectively; the object side surface and the image side surface of the second lens are both convex; 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 both convex; the object side surface of the sixth lens is convex; the object side surface and the image side surface of the seventh lens are both concave; the spacer assembly 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, and 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; the optical imaging lens satisfies: 7.69 mm ≤ f × tan(HFOV) ≤ 9.27 mm; and 33.65 < EP23 / T23 < 59.35; where f is the effective focal length of the optical imaging lens, HFOV is half of the maximum field of view angle of the optical imaging lens, EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element, and T23 is the air gap between the center of the image side surface of the second lens and the center of the object side surface of the third lens in the optical axis direction.

[0005] According to some embodiments of the present application, the spacer assembly further includes a first spacer element disposed between the first lens and the second lens and in contact with the image side surface of the first lens, and the optical imaging lens satisfies: -43.12 ≤ f1 / EP01 ≤ -24.50; where f1 is the effective focal length of the first lens, and EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element.

[0006] According to some embodiments of the present application, the optical imaging lens satisfies: -4.70 < f1 / (d1m + D1m) < -3.00; where f1 is the effective focal length of the first lens, d1m is the inner diameter of the image side of the first spacer element, and D1m is the outer diameter of the image side of the first spacer element.

[0007] According to some embodiments of the present application, the second lens is a convex lens, and the optical imaging lens satisfies: 2.25 < (D2m - d2s) / CT2 < 3.20; where D2m is the outer diameter of the image side of the second spacer element, d2s is the inner diameter of the object side of the second spacer element, and CT2 is the central thickness of the second lens on the optical axis.

[0008] According to some embodiments of the present application, the spacer assembly further includes a fourth spacer element disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, and the optical imaging lens satisfies: -18.25 < R8 / d4s × 10 < -14.40; where R8 is the radius of curvature of the image side surface of the fourth lens, and d4s is the inner diameter of the object side of the fourth spacer element.

[0009] According to some embodiments of the present application, the fourth lens is a glass lens, and the optical imaging lens satisfies: 58.65 mm ≤ N4 × V4 × CP4 < 74.55 mm; where N4 is the refractive index of the material of the fourth lens, V4 is the Abbe number of the material of the fourth lens, and CP4 is the maximum thickness of the fourth spacer element.

[0010] According to some embodiments of the present application, the spacer assembly further includes 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, and the optical imaging lens satisfies: 1.10 < (D0m - d6m) / f7 < 1.65; where D0m is the outer diameter of the image side of the lens barrel, d6m is the inner diameter of the image side of the sixth spacer element, and f7 is the effective focal length of the seventh lens.

[0011] According to some embodiments of the present application, the optical imaging lens satisfies: -4.85 < f1 / L ≤ -3.10; where f1 is the effective focal length of the first lens, and L is the distance between the object side surface and the image side surface of the lens barrel.

[0012] According to some embodiments of the present application, the optical imaging lens satisfies: 1.95 < (D2m - d2m) / CP2 < 16.75; where D2m is the outer diameter of the image side of the second spacer element, d2m is the inner diameter of the image side of the second spacer element, and CP2 is the maximum thickness of the second spacer element.

[0013] According to some embodiments of the present application, the optical imaging lens satisfies: 2.95 ≤ CP4 / T45 ≤ 5.05; where CP4 is the maximum thickness of the fourth spacer element, and T45 is the air gap in the optical axis direction between the center of the image side of the fourth lens and the center of the object side of the fifth lens.

[0014] According to some embodiments of the present application, the optical imaging lens satisfies: 8.70 < d4s / CP4 < 15.70; where d4s is the inner diameter of the object side of the fourth spacer element, and CP4 is the maximum thickness of the fourth spacer element.

[0015] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20 < D2m / d2m < 1.75; where D2m is the outer diameter of the image side of the second spacer element, and d2m is the inner diameter of the image side of the second spacer element.

[0016] According to some embodiments of the present application, the optical imaging lens satisfies: 10.80 < L / BFL < 12.25; where L is the distance from the object side to the image side of the lens barrel, and BFL is the distance from the seventh lens to the image plane.

[0017] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20 < (d4s - d3m) / EP34 < 2.30; where d4s is the inner diameter of the object side of the fourth spacer element, d3m is the inner diameter of the image side of the third spacer element, and EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element.

[0018] According to some embodiments of the present application, the optical imaging lens satisfies: 0.95 < EP12 / CT1 < 2.35; where EP12 is the distance from the image side of the first spacer element to the object side of the second spacer element, and CT1 is the central thickness of the first lens along the optical axis direction.

[0019] According to some embodiments of the present application, the optical imaging lens satisfies: 9.90 mm < TD × tan(HFOV) < 12.05 mm; and 14.15 ≤ D0m / L × 10 ≤ 16.10; where TD is the central distance in the optical axis direction from the object side surface of the first lens of the lens to the image side surface of the seventh lens, HFOV is half of the maximum field of view angle of the optical imaging lens, D0m is the outer diameter of the image side surface of the lens barrel, and L is the height of the lens barrel.

[0020] In summary, the optical imaging lens of the present application has the characteristics of a larger image plane and higher pixels compared with the main camera lens of traditional action cameras. While ensuring high performance, it can achieve lens miniaturization through a more compact structural design, meeting the high-quality shooting requirements and ensuring the portability of the product, and further improving the shooting experience of users. However, in the environment of a large image plane, the optical imaging lens of the present application is prone to problems of unstable assembly. Especially when the abutment step difference and gap between the second lens and the third lens component are large, the flange position of the third lens is easily affected by shear force and deformed, resulting in an increase in the surface shape after assembly, and further leading to a decline in the performance of the edge field of view, causing problems such as image blur or inability to focus in the surrounding picture when the product is used. Therefore, by controlling the distance from the image side surface of the second spacer element to the object side surface of the third spacer element and cooperating with the air spacing distance between the centers of the second lens and the third lens in the optical axis direction, the structural distribution uniformity of the second lens and the third lens can be effectively ensured, which is beneficial to achieving a compact lens structure, ensuring the assembly stability of the second lens and the third lens, thereby improving the overall assembly stability of the lens and the yield. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the structural parameters of an optical imaging lens according to an embodiment of the present application;

[0022] Figure 2 is a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application;

[0023] Figure 3 is a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application;

[0024] Figure 4 is a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application;

[0025] 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;

[0026] Figure 5BShows the astigmatism curve schematic diagram of the optical imaging lens according to the first, second, and third above-mentioned embodiments of the present application;

[0027] Figure 5C Shows the distortion curve schematic diagram of the optical imaging lens according to the first, second, and third above-mentioned embodiments of the present application;

[0028] Figure 5D Shows the longitudinal chromatic aberration curve schematic diagram of the optical imaging lens according to the first, second, and third above-mentioned embodiments of the present application;

[0029] Figure 6 Is the structural schematic diagram of the optical imaging lens according to the fourth embodiment of the present application;

[0030] Figure 7 Is the structural schematic diagram of the optical imaging lens according to the fifth embodiment of the present application;

[0031] Figure 8 Is the structural schematic diagram of the optical imaging lens according to the sixth embodiment of the present application;

[0032] Figure 9A Shows the axial chromatic aberration curve schematic diagram of the optical imaging lens according to the fourth, fifth, and sixth above-mentioned embodiments of the present application;

[0033] Figure 9B Shows the astigmatism curve schematic diagram of the optical imaging lens according to the fourth, fifth, and sixth above-mentioned embodiments of the present application;

[0034] Figure 9C Shows the distortion curve schematic diagram of the optical imaging lens according to the fourth, fifth, and sixth above-mentioned embodiments of the present application;

[0035] Figure 9D Shows the longitudinal chromatic aberration curve schematic diagram of the optical imaging lens according to the fourth, fifth, and sixth above-mentioned embodiments of the present application;

[0036] Figure 10 Is the structural schematic diagram of the optical imaging lens according to the seventh embodiment of the present application;

[0037] Figure 11 Is the structural schematic diagram of the optical imaging lens according to the eighth embodiment of the present application;

[0038] Figure 12 Is the structural schematic diagram of the optical imaging lens according to the ninth embodiment of the present application;

[0039] Figure 13AShows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens according to the seventh, eighth, and ninth embodiments of the present application;

[0040] 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;

[0041] Figure 13C Shows a schematic diagram of the distortion curve of the optical imaging lens according to the seventh, eighth, and ninth embodiments of the present application;

[0042] Figure 13D 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;

[0043] Figure 14 Shows the MTF defocus curve when the optical imaging lens satisfies the relation EP23 / T23 = 36.7;

[0044] Figure 15 Shows the MTF defocus curve when the optical imaging lens satisfies the relation EP23 / T23 = 42.3;

[0045] Figure 16 Shows the MTF defocus curve when the optical imaging lens satisfies the relation EP23 / T23 = 31.9;

[0046] Figure 17 Shows the MTF defocus curve when the optical imaging lens satisfies the relation EP23 / T23 = 62.2. Detailed implementation manners

[0047] To better understand the present application, more detailed descriptions will be made for various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the 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.

[0048] 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 feature. 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.

[0049] In the accompanying drawings, for the sake of convenience in explanation, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the accompanying drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not drawn to an exact scale.

[0050] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made according to the general methods in the art. For example, the concavity and convexity can be judged by the positive or negative value of the R value (R refers to the radius of curvature in the paraxial region). In this text, 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 judged to be convex, and when the R value is negative, it is judged to be concave; for the image side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0051] It should also be understood that the terms "comprises", "comprising", "has", "including", and / or "including having", 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. In addition, when an expression such as "at least one of..." appears after the list of listed features, it modifies the entire list of listed features, rather than an individual element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0052] 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.

[0053] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it 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 combination with the embodiments.

[0054] According to one aspect of the present application, as Figure 1 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 assembly accommodated within the lens barrel; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, and a fourth lens with negative optical power; the spacer assembly includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, and 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.

[0055] As Figure 1 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 assembly accommodated within the lens barrel; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens with negative optical power, a second lens with positive optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power; the object side surface and the image side surface of the first lens are concave and convex, respectively; the object side surface and the image side surface of the second lens are both convex; 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 both convex; the object side surface of the sixth lens is convex; the object side surface and the image side surface of the seventh lens are both concave; 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, and 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;

[0056] In particular, the optical imaging lens satisfies: 7.69 mm ≤ f × tan(HFOV) ≤ 9.27 mm and 33.65 < EP23 / T23 < 59.35; where f is the effective focal length of the optical imaging lens, HFOV is half of the maximum field of view angle of the optical imaging lens, EP23 is the distance from the image side of the second spacer element to the object side of the third spacer element, and T23 is the air gap between the center of the image side of the second lens and the center of the object side of the third lens in the optical axis direction.

[0057] It should be noted that the optical imaging lens of the present application has the characteristics of a larger image plane and higher pixels compared with the main camera lens of traditional action cameras. While ensuring high performance, it can achieve lens miniaturization through a more compact structural design, meeting the high-quality shooting requirements while ensuring the portability of the product, and further improving the shooting experience of users.

[0058] However, in the environment of a large image plane, the optical imaging lens of the present application is prone to the problem of unstable assembly. Especially when the abutment step difference and gap between the second lens and the third lens element are large, the flange position of the third lens is easily affected by shear force and deformed, resulting in an increase in the surface shape after assembly, and then a decrease in the edge field performance, causing problems such as image blurring or inability to focus in the surrounding picture when the product is used. Therefore, by controlling the distance from the image side of the second spacer element to the object side of the third spacer element and cooperating with the air gap distance between the centers of the second lens and the third lens in the optical axis direction, the structural distribution uniformity of the second lens and the third lens can be effectively ensured, which is beneficial to achieving a compact lens structure, ensuring the assembly stability of the second lens and the third lens, thereby improving the overall assembly stability of the lens and the yield.

[0059] Exemplarily, Figure 14 shows the MTF defocus curve when the optical imaging lens satisfies the relationship EP23 / T23 = 36.7; Figure 15 shows the MTF defocus curve when the optical imaging lens satisfies the relationship EP23 / T23 = 42.3; Figure 16 shows the MTF defocus curve when the optical imaging lens satisfies the relationship EP23 / T23 = 31.9; Figure 17 shows the MTF defocus curve when the optical imaging lens satisfies the relationship EP23 / T23 = 62.2. From Figure 14 and Figure 15 it can be seen that when the relationship EP23 / T23 is within the range greater than 33.65 and less than 59.35, the parameter design of the optical imaging lens is reasonable, the defocus curve has a good trend, and the optical imaging lens has good imaging effects and assembly stability. From Figure 16It can be known that when the relational expression EP23 / T23 is within the range less than 33.65, the light refraction is steep, causing the field curvature shift and peak drop in the outer field of view, resulting in poor imaging effect of the optical imaging lens. From Figure 17 It can be known that when the relational expression EP23 / T23 is within the range greater than 59.35, the bearing stability of the lens decreases, causing the field curvature shift and peak drop in the outer field of view, resulting in poor imaging effect of the optical imaging lens.

[0060] Preferably, the optical imaging device satisfies: 7.69mm ≤ f×tan(HFOV) ≤ 9.27mm and 33.67 ≤ EP23 / T23 ≤ 59.33.

[0061] According to some embodiments of the present application, the spacer assembly further includes a first spacer element disposed between the first lens and the second lens and in contact with the image side surface of the first lens, and the optical imaging lens satisfies: -43.12 ≤ f1 / EP01 ≤ -24.50; wherein, f1 is the effective focal length of the first lens, and EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element.

[0062] In this way, by controlling the effective focal length of the first lens, the concavity and convexity of the shape of the first lens can be effectively controlled. Cooperating with controlling the distance between the object side surface of the lens barrel and the object side surface of the first spacer element, the edge thickness of the first lens can be controlled within a reasonable range, thereby ensuring the formability of the lens.

[0063] According to some embodiments of the present application, the optical imaging lens satisfies: -4.70 < f1 / (d1m + D1m) < -3.00; wherein, f1 is the effective focal length of the first lens, d1m is the image-side inner diameter of the first spacer element, and D1m is the image-side outer diameter of the first spacer element.

[0064] In this way, through the above relational expression, the angle of the light rays emerging from the edge of the first lens can be effectively controlled. Cooperating with the image-side inner diameter of the first spacer element, the redundant stray light rays can be effectively intercepted, ensuring the imaging purity.

[0065] Preferably, the optical imaging device satisfies: -4.69 ≤ f1 / (d1m + D1m) ≤ -3.01.

[0066] According to some embodiments of the present application, the second lens is a convex lens, and the optical imaging lens satisfies: 2.25 < (D2m - d2s) / CT2 < 3.20; wherein, D2m is the image-side outer diameter of the second spacer element, d2s is the object-side inner diameter of the second spacer element, and CT2 is the central thickness of the second lens on the optical axis.

[0067] In this way, since the second lens is a convex lens in the optical system, by controlling the central thickness of the second lens through the above relationship, the degree of light convergence of the second lens can be controlled to a certain extent, ensuring the imaging effect. Additionally, by controlling the image-side outer diameter and object-side inner diameter of the second spacer element, a large bearing misalignment between the second lens and the third lens can be avoided, ensuring assembly stability and improving the lens assembly yield.

[0068] Preferably, the optical imaging device satisfies: 2.28 ≤ (D2m - d2s) / CT2 ≤ 3.16.

[0069] According to some embodiments of the present application, the spacer assembly further includes a fourth spacer element disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens. The optical imaging lens satisfies: -18.25 < R8 / d4s × 10 < -14.40; where R8 is the radius of curvature of the image side surface of the fourth lens, and d4s is the object-side inner diameter of the fourth spacer element.

[0070] In this way, through the above relationship, the angle of light rays emerging from the edge of the fourth lens can be effectively controlled. Additionally, by controlling the object-side inner diameter of the fourth spacer element, the range of light rays emerging from the edge of the fourth lens can be reasonably controlled, intercepting large-angle stray light rays and improving the imaging quality of the optical imaging lens.

[0071] Preferably, the optical imaging device satisfies: -18.21 ≤ R8 / d4s × 10 ≤ -14.41.

[0072] According to some embodiments of the present application, the fourth lens is a glass lens, and the optical imaging lens satisfies: 58.65 mm ≤ N4 × V4 × CP4 < 74.55 mm; where N4 is the refractive index of the material of the fourth lens, V4 is the Abbe number of the material of the fourth lens, and CP4 is the maximum thickness of the fourth spacer element.

[0073] In this way, since the fourth lens is a glass lens and is located in the middle of the optical system, by controlling the refractive index and thickness of the fourth lens through the above relationship, the optical sensitivity of the fourth lens can be effectively controlled, improving the performance yield of the lens. Additionally, by controlling the Abbe number of the material of the fourth lens, the degree of light dispersion can be effectively improved, reducing the chromatic aberration of the system and improving the imaging clarity.

[0074] Preferably, the optical imaging device satisfies: 58.65 mm ≤ N4 × V4 × CP4 ≤ 74.53 mm.

[0075] According to some embodiments of the present application, the spacer assembly further includes 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, and the optical imaging lens satisfies: 1.10 < (D0m - d6m) / f7 < 1.65; where D0m is the outer diameter of the image side of the lens barrel, d6m is the inner diameter of the image side of the sixth spacer element, and f7 is the effective focal length of the seventh lens.

[0076] In this way, by controlling the mutual relationship among the outer diameter of the image side of the lens barrel, the inner diameter of the image side of the sixth spacer element, and the effective focal length of the seventh lens through the above relationship, the rationality of the overall shape of the lens barrel and the size distribution of the spacer element can be effectively controlled, thereby ensuring the compactness of the optical system; in addition, since the seventh lens is the last lens, by controlling the effective focal length of the seventh lens, the range of the outgoing light angle of the lens can be controlled to ensure the matching of the lens with the photosensitive chip.

[0077] Preferably, the optical imaging device satisfies: 1.11 ≤ (D0m - d6m) / f7 ≤ 1.62.

[0078] According to some embodiments of the present application, the optical imaging lens satisfies: -4.85 < f1 / L ≤ -3.10; where f1 is the effective focal length of the first lens and L is the distance from the object side surface to the image side surface of the lens barrel.

[0079] In this way, the height of the overall lens can be effectively controlled through the above relationship to ensure that the optical system design is within a reasonable size range; in addition, by controlling the effective focal length of the first lens, the field of view angle range of the lens can be controlled.

[0080] Preferably, the optical imaging device satisfies: -4.81 ≤ f1 / L ≤ -3.10.

[0081] According to some embodiments of the present application, the optical imaging lens satisfies: 1.95 < (D2m - d2m) / CP2 < 16.75; where D2m is the outer diameter of the image side surface of the second spacer element, d2m is the inner diameter of the image side surface of the second spacer element, and CP2 is the maximum thickness of the second spacer element.

[0082] In this way, by controlling the inner and outer diameters of the second spacer element, the range of the outgoing light at the edge of the second lens can be effectively controlled. In addition, the width of the flange of the second lens can be controlled to ensure a reasonable bearing length. By cooperating with controlling the thickness of the second spacer element within a reasonable range, the bearing stability between the third lens and the second lens can be ensured, and the assembly yield can be improved.

[0083] Preferably, the optical imaging device satisfies: 1.97 ≤ (D2m - d2m) / CP2 ≤ 16.71.

[0084] According to some embodiments of the present application, the optical imaging lens satisfies: 2.95≤CP4 / T45≤5.05; wherein CP4 is the maximum thickness of the fourth spacer element, and T45 is the air spacing between the center of the image side surface of the fourth lens and the center of the object side surface of the fifth lens in the optical axis direction.

[0085] In this way, since the fourth lens is a glass lens, it can improve the temperature drift and reduce the dispersion in the optical system. Through the above relationship, the air gap between the fourth lens and the fifth lens is controlled to be maintained within a reasonable range, which helps to reduce the imaging error caused by the slight displacement between the lenses, and can effectively reduce the sensitivity of the gap between the fourth lens and the fifth lens, thereby improving the assembly stability.

[0086] According to some embodiments of the present application, the optical imaging lens satisfies: 8.70<d4s / CP4<15.70; wherein d4s is the inner diameter of the object side of the fourth spacer element, and CP4 is the maximum thickness of the fourth spacer element.

[0087] In this way, by controlling the thickness of the fourth spacer element through the above relationship, the edge thickness of the fifth lens can be controlled within a certain range, so that the thickness difference between the flange position of the fifth lens and the optical part can be controlled, and the formability of the fifth lens can be ensured; in addition, by controlling the inner diameter of the object side of the fourth spacer element, the light aperture of the edge of the third lens can be controlled, which is conducive to ensuring a certain relative illumination, so that the optical system can achieve a more uniform imaging brightness distribution, thereby improving the overall performance of the optical system.

[0088] Preferably, the optical imaging device satisfies: 8.73≤d4s / CP4≤15.69.

[0089] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20<D2m / d2m<1.75; wherein D2m is the outer diameter of the image side surface of the second spacing element, and d2m is the inner diameter of the image side surface of the second spacing element.

[0090] In this way, by controlling the inner diameter and outer diameter of the image side surface of the second spacing element, the range of the light emitted from the edge of the second lens can be effectively controlled, large-angle stray light can be intercepted, and the imaging quality of the optical imaging lens can be improved.

[0091] Preferably, the optical imaging device satisfies: 1.22≤D2m / d2m≤1.72.

[0092] According to some embodiments of the present application, the optical imaging lens satisfies: 10.80<L / BFL<12.25; wherein L is the distance from the object side to the image side of the lens barrel, and BFL is the distance from the seventh lens to the image plane.

[0093] In this way, through the above relationships, the overall height and the total mechanical length of the lens can be effectively controlled, which is beneficial to distinguishing the outer contour differences of the entire lens barrel structure, effectively controlling the fit between the lens and the module, reasonably arranging the positions of the spacer elements, and reducing the generation of stray light in the lens.

[0094] Preferably, the optical imaging device satisfies: 10.84 ≤ L / BFL ≤ 12.21.

[0095] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20 < (d4s - d3m) / EP34 < 2.30; where d4s is the inner diameter of the object side of the fourth spacer element, d3m is the inner diameter of the image side of the third spacer element, and EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element.

[0096] In this way, by controlling the distance from the image side of the third spacer element to the object side of the fourth spacer element through the above relationship, the flange thickness of the fourth lens can be controlled within a reasonable range, ensuring the strength of the structural part, and thus reducing the forming difficulty of the fourth lens.

[0097] Preferably, the optical imaging device satisfies: 1.23 ≤ (d4s - d3m) / EP34 ≤ 2.29.

[0098] According to some embodiments of the present application, the optical imaging lens satisfies: 0.95 < EP12 / CT1 < 2.35; where EP12 is the distance from the image side of the first spacer element to the object side of the second spacer element, and CT1 is the central thickness of the first lens along the optical axis direction.

[0099] In this way, by controlling the distance from the image side of the first spacer element to the object side of the second spacer element, the edge thickness of the second lens can be controlled, ensuring reasonable formability of the second lens. In addition, by controlling the central thickness of the first lens on the optical axis, the overall structural distribution uniformity of the first lens and the second lens can be ensured, improving the assembly stability.

[0100] Preferably, the optical imaging device satisfies: 0.98 ≤ EP12 / CT1 ≤ 2.32.

[0101] According to some embodiments of the present application, the optical imaging lens satisfies: 9.90 mm < TD × tan(HFOV) < 12.05 mm and 14.15 ≤ D0m / L × 10 ≤ 16.10; where TD is the central distance in the optical axis direction from the object side of the first lens of the lens to the image side of the seventh lens, HFOV is half of the maximum field of view angle of the optical imaging lens, D0m is the outer diameter of the image side of the lens barrel, and L is the height of the lens barrel.

[0102] In this way, through the above relationships, the mutual relationship between the distance from the first lens to the image side surface of the seventh lens and the maximum field of view angle can be reasonably controlled. And by controlling the outer diameter of the image side surface of the lens barrel and the height of the lens barrel, the overall height of the lens can be controlled within a certain range, ensuring the miniaturization of the optical system.

[0103] Preferably, the optical imaging device satisfies: 9.94mm ≤ TD × tan(HFOV) ≤ 12.01mm and 14.15 ≤ D0m / L × 10 ≤ 16.10.

[0104] It should be noted that those skilled in the art should understand that without departing from the technical solution claimed in this application, the number of spacer elements in the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and this application does not make specific limitations in this regard. 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.

[0105] The following describes some specific but non-limiting embodiments of the above embodiments of this application in more detail with reference to the drawings. For the convenience of description, in the following embodiments, OBJ represents the object surface of the optical imaging lens (not shown in the figure), STO represents the surface of the aperture stop (not shown in the figure), S1 represents the object side surface of the first lens E1, S2 represents the image side surface of the first lens E1, S3 represents the object side surface of the second lens E2, S4 represents the image side surface of the second lens E2, S5 represents the object side surface of the third lens E3, S6 represents the image side surface of the third lens E3, S7 represents the object side surface of the fourth lens E4, S8 represents the image side surface of the fourth lens E4, S9 represents the object side surface of the fifth lens E5, S10 represents the image side surface of the fifth lens E5, S11 represents the object side surface of the sixth lens E6, S12 represents the image side surface of the sixth lens E6, S13 represents the object side surface of the seventh lens E7, S14 represents the image side surface of the seventh lens E7, S15 can represent the object side surface of the filter (not shown in the figure), S16 can represent the image side surface of the filter (not shown in the figure), and S17 represents the image plane of the optical imaging lens (not shown in the figure). In addition, Aj represents the j-th order aspherical coefficient, where j = 4, 6, 8, 10, 12, 14, 16.

[0106] Embodiment 1

[0107] 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 along the optical axis from the object side to the image side: a first lens E1 with negative optical power, a second lens E2 with positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with negative optical power; the spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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.

[0108] In this embodiment, the spacer assembly further includes a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a first auxiliary spacer element P1b placed between the first spacer element P1 and the second lens E2 and in contact with the image side surface of the first spacer element P1, a fifth auxiliary spacer element P5b placed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5, and a sixth auxiliary spacer element P6b placed between the sixth spacer element P6 and the seventh lens E7 and in contact with the image side surface of the sixth spacer element P6.

[0109] In this embodiment, the first lens has negative optical power, and the object side surface S1 and the image side surface S2 of the first lens E1 are concave and convex respectively; the second lens E2 has positive optical power, and the object side surface S3 and the image side surface S4 of the second lens E2 are both convex; the third lens E3 has negative optical power, and the object side surface S5 and the image side surface S6 of the third lens E3 are convex and concave respectively; the fourth lens E4 has positive optical power, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex; the fifth lens E5 has negative optical power, and the object side surface S9 and the image side surface S10 of the fifth lens E5 are concave and convex respectively; the sixth lens E6 has positive optical power, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are convex and concave respectively, and the seventh lens E7 has negative optical power, and the object side surface S13 and the image side surface S14 of the seventh lens E7 are both concave.

[0110] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0111] Table 1: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 1

[0112]

[0113] In this embodiment, the object side and the image side of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0114] ;

[0115] where x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, 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 high-order coefficients A4, A6, A8, A10, A12, A14, A16 for each aspherical mirror surface S1 to S14 in Embodiment 1.

[0116] Table 2: Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment 1

[0117]

[0118] Embodiment 2

[0119] As Figure 3As 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 positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with negative optical power; the spacer assembly includes a first spacer element P1 disposed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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 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.

[0120] In this embodiment, the spacer assembly further includes a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a first auxiliary spacer element P1b disposed between the first spacer element P1 and the second lens E2 and in contact with the image side surface of the first spacer element P1, and a fifth auxiliary spacer element P5b disposed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5.

[0121] It should be noted that, compared with the above-mentioned Embodiment 1, the optical imaging lens of this Embodiment 2 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this Embodiment 2 is the same as Table 1, and the aspherical coefficient table is the same as Table 2. And the optical imaging lens of this Embodiment 2 has a different black object structure from the optical imaging lens of the above-mentioned Embodiment 1, that is, the difference between this Embodiment 2 and the above-mentioned Embodiment 1 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.

[0122] Specifically, the numerical values of the respective relevant structural parameters in the second embodiment and the first embodiment above are shown in Table 8 below. The multiple black object parameters specifically include: the image-side inner diameter d1m of the first spacer element P1; the image-side outer diameter D1m of the first spacer element P1; the object-side inner diameter d2s of the second spacer element P2; the image-side inner diameter d2m of the second spacer element P2; the image-side outer diameter D2m of the second spacer element P2; the image-side inner diameter d3m of the third spacer element P3; the object-side inner diameter d4s of the fourth spacer element P4; the image-side inner diameter d6m of the sixth spacer element P6; the distance EP01 between the object side surface of the lens barrel P0 and the object side surface of the first spacer element P1; the distance EP12 between the image side surface of the first spacer element P1 and the object side surface of the second spacer element P2; the maximum thickness CP2 of the second spacer element P2; the distance EP23 between the image side surface of the second spacer element P2 and the object side surface of the third spacer element P3; the distance EP34 between the image side surface of the third spacer element P3 and the object side surface of the fourth spacer element P4; the maximum thickness CP4 of the fourth spacer element P4; the image-side outer diameter D0m of the lens barrel P0; the distance 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 the schematic illustration of each parameter in the structural diagram of the optical imaging lens is as Figure 1 shown.

[0123] Embodiment Three

[0124] As Figure 4 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 optical power, a second lens E2 with a positive 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 negative optical power, a sixth lens E6 with a positive optical power, and a seventh lens E7 with a negative optical power; the spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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.

[0125] In this embodiment, the spacer assembly further includes a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a second auxiliary spacer element P2b disposed between the second spacer element P2 and the third lens E3 and in contact with the image side surface of the second spacer element P2, and a fifth auxiliary spacer element P5b disposed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5.

[0126] It should be noted that, compared with the first embodiment above, the optical imaging lens of this third embodiment has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this third embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of this third embodiment and the optical imaging lens of the first embodiment above have different black object structures, that is, the difference between this third 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. Specifically, the numerical values of each relevant structural parameter in this third embodiment are shown in Table 8 later. 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.

[0127] Through simulation tests: The axial chromatic aberration curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5A shown, which represents the deviation degree 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 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 distortion 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 distortion conditions at different field angles; the longitudinal chromatic aberration curves of the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment are as Figure 5D shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to Figure 5A , Figure 5B , Figure 5C and Figure 5D it can be seen that the optical imaging lenses in the first embodiment, the second embodiment, and the third embodiment can all achieve good imaging quality.

[0128] Embodiment 4

[0129] As Figure 6As shown, in this embodiment, the optical imaging lens includes a lens barrel P0, 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 positive 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 negative optical power, a sixth lens E6 with a positive optical power, and a seventh lens E7 with a negative optical power; the spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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.

[0130] In this embodiment, the spacer assembly further includes a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, and a fifth auxiliary spacer element P5b placed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5.

[0131] In this embodiment, the first lens has a negative optical power, and the object side surface S1 and the image side surface S2 of the first lens E1 are concave and convex, respectively; the second lens E2 has a positive optical power, and the object side surface S3 and the image side surface S4 of the second lens E2 are both convex; the third lens E3 has a negative optical power, and the object side surface S5 and the image side surface S6 of the third lens E3 are convex and concave, respectively; the fourth lens E4 has a positive optical power, and the object side surface S7 and the image side surface S8 of the fourth lens E4 are both convex; the fifth lens E5 has a negative optical power, and the object side surface S9 and the image side surface S10 of the fifth lens E5 are concave and convex, respectively; the sixth lens E6 has a positive optical power, and the object side surface S11 and the image side surface S12 of the sixth lens E6 are convex and concave, respectively, and the seventh lens E7 has a negative optical power, and the object side surface S13 and the image side surface S14 of the seventh lens E7 are both concave.

[0132] 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 and the thickness / distance are both millimeters (mm).

[0133] Table 3: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment 4

[0134]

[0135] In this embodiment, both the object side and the image side of any one of the first lens E1 to the seventh lens E7 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 4 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16 of the aspherical surfaces S1 to S14 in the fourth embodiment.

[0136] Table 4: Aspherical Coefficient Table of the Optical Imaging Lens in the Fourth Embodiment

[0137]

[0138] Embodiment Five

[0139] 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, arranged in order 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 positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with negative optical power; the spacer assembly includes a first spacer element P1 disposed between the first lens E1 and the second lens E2 and in contact with the image side of the first lens E1, a second spacer element P2 disposed 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 disposed between the third lens E3 and the fourth lens E4 and in contact with the image side of the third lens E3, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side of the fourth lens E4, and a sixth spacer element P6 disposed between the sixth lens E6 and the seventh lens E7 and in contact with the image side of the sixth lens E6.

[0140] In this embodiment, the spacer assembly further includes a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a first auxiliary spacer element P1b disposed between the first spacer element P1 and the second lens E2 and in contact with the image side surface of the first spacer element P1, 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, a fifth auxiliary spacer element P5b disposed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5, and a sixth auxiliary spacer element P6b disposed between the sixth spacer element P6 and the seventh lens E7 and in contact with the image side surface of the sixth spacer element P6.

[0141] It should be noted that, compared with the above-mentioned 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-mentioned Embodiment 4 have different black object structures, that is, the difference between this Embodiment 5 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 5 are shown in Table 8 below, 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.

[0142] Embodiment 6

[0143] As Figure 8As 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 positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with negative optical power; the spacer assembly includes a first spacer element P1 disposed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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 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.

[0144] In this embodiment, the spacer assembly further includes a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a first auxiliary spacer element P1b disposed between the first spacer element P1 and the second lens E2 and in contact with the image side surface of the first spacer element P1, and a fifth auxiliary spacer element P5b disposed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5.

[0145] 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. And the optical imaging lens of this Embodiment 6 has a different black object structure from the optical imaging lens of the above-mentioned Embodiment 4, that is, the difference between this Embodiment 6 and the above-mentioned Embodiment 4 is 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 Embodiment 2 above, and will not be repeated here.

[0146] 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 deviation degree of the focusing points of light rays of 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 asFigure 9B As shown, it represents the curvature degree of the meridional image plane and the curvature degree of the sagittal image plane; The distortion curves of the optical imaging lens in Embodiment Four, Embodiment Five, and Embodiment Six are as Figure 9C shown, which represents the distortion conditions at different field angles; The longitudinal chromatic aberration curves of the optical imaging lens in Embodiment Four, Embodiment Five, and Embodiment Six are as Figure 9D shown, which represents the change in magnification of light rays with different wavelengths during imaging. According to Figure 9A 、 Figure 9B 、 Figure 9C and Figure 9D it can be seen that the optical imaging lenses in Embodiment Four, Embodiment Five, and Embodiment Six can all achieve good imaging quality.

[0147] Embodiment Seven

[0148] As Figure 10 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 positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, a sixth lens E6 with positive optical power, and a seventh lens E7 with negative optical power; The spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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.

[0149] In this embodiment, the spacer assembly further includes a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a fifth auxiliary spacer element P5b placed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5, and a sixth auxiliary spacer element P6b placed between the sixth spacer element P6 and the seventh lens E7 and in contact with the image side surface of the sixth spacer element P6.

[0150] In this embodiment, the first lens has a negative optical power, and the object side S1 and the image side S2 of the first lens E1 are concave and convex surfaces respectively; the second lens E2 has a positive optical power, and the object side S3 and the image side S4 of the second lens E2 are both convex surfaces; the third lens E3 has a negative optical power, and the object side S5 and the image side S6 of the third lens E3 are convex and concave surfaces respectively; the fourth lens E4 has a positive optical power, and the object side S7 and the image side S8 of the fourth lens E4 are both convex surfaces; the fifth lens E5 has a negative optical power, and the object side S9 and the image side S10 of the fifth lens E5 are convex and concave surfaces respectively; the sixth lens E6 has a positive optical power, and the object side S11 and the image side S12 of the sixth lens E6 are both convex surfaces, and the seventh lens E7 has a negative optical power, and the object side S13 and the image side S14 of the seventh lens E7 are both concave surfaces.

[0151] 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 and the thickness / distance are both millimeters (mm).

[0152] Table 5: Basic Optical Parameter Table of the Optical Imaging Lens of Embodiment VII

[0153]

[0154] In this embodiment, the object side and the image side of any one of the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by the aspherical formula given in Embodiment I above. Table 6 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16 of the aspherical surfaces S1 to S14 that can be used in Embodiment VII.

[0155] Table 6: Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment VII

[0156]

[0157] Embodiment VIII

[0158] As Figure 11As shown, in this embodiment, the optical imaging lens includes a lens barrel P0, 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 optical power, a second lens E2 with a positive 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 negative optical power, a sixth lens E6 with a positive optical power, and a seventh lens E7 with a negative optical power; the spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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.

[0159] In this embodiment, the spacer assembly further includes a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a second auxiliary spacer element P2b placed between the second spacer element P2 and the third lens E3 and in contact with the image side surface of the second spacer element P2, a fourth auxiliary spacer element P4b placed 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, a fifth auxiliary spacer element P5b placed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5, and a sixth auxiliary spacer element P6b placed between the sixth spacer element P6 and the seventh lens E7 and in contact with the image side surface of the sixth spacer element P6.

[0160] It should be noted that, compared with the above Embodiment 7, the optical imaging lens of this Embodiment 8 has the same white object structure, that is, the basic optical parameter table of the optical imaging lens of this Embodiment 8 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of this Embodiment 8 has a different black object structure from the optical imaging lens of the above Embodiment 7, that is, the difference between this Embodiment 8 and the above Embodiment 7 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 8 are shown in Table 8 below, and 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.

[0161] Embodiment 9

[0162] 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 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 positive 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 negative optical power, a sixth lens E6 with a positive optical power, and a seventh lens E7 with a negative optical power; the spacer assembly includes a first spacer element P1 placed between the first lens E1 and the second lens E2 and in contact with the image side surface of the first lens E1, 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, 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, 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 assembly further includes a fifth spacer element P5 placed between the fifth lens E5 and the sixth lens E6 and in contact with the image side surface of the fifth lens E5, a second auxiliary spacer element P2b placed between the second spacer element P2 and the third lens E3 and in contact with the image side surface of the second spacer element P2, a fourth auxiliary spacer element P4b placed 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, a fifth auxiliary spacer element P5b placed between the fifth spacer element P5 and the sixth lens E6 and in contact with the image side surface of the fifth spacer element P5, and a sixth auxiliary spacer element P6b placed between the sixth spacer element P6 and the seventh lens E7 and in contact with the image side surface of the sixth spacer element P6.

[0164] 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. 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 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 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.

[0165] 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 deviation degree 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 degree of the meridional image plane and the curvature degree of the sagittal image plane; the distortion 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 distortion conditions at different field angles; the lateral chromatic aberration curves of the optical imaging lenses in the seventh embodiment, the eighth embodiment, and the ninth embodiment are as Figure 13D shown, which represents the change in magnification of light rays of different wavelengths during imaging. According to Figure 13A 、 Figure 13B 、 Figure 13C and Figure 13D , 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.

[0166] In summary, in the first to ninth embodiments, half of the maximum field of view angle HFOV of the optical imaging lens, the image height ImgH of the optical imaging lens, and the effective focal lengths f1 to f7 of the first lens E1 and the seventh lens E7 in the optical imaging lens are respectively shown in Table 7 below.

[0167] Table 7: System optical parameter table of the optical imaging lens

[0168]

[0169] In addition, the black object structure parameters of the optical imaging lenses in the first to ninth embodiments are specifically shown in Table 8.

[0170] Table 8: Black object structure parameter table of the optical imaging lens

[0171]

[0172] 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.

[0173] Table 9: Table of Relational Expressions Satisfied by the Optical Imaging Lens

[0174]

[0175] 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 the scope described in this specification.

[0176] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to 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 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 optical power, a second lens with a positive optical power, a third lens with a negative optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power; the object side surface and the image side surface of the first lens are respectively concave and convex; the object side surface and the image side surface of the second lens are both convex; the object side surface and the image side surface of the third lens are respectively convex and concave; the object side surface and the image side surface of the fourth lens are both convex; the object side surface of the sixth lens is convex; the object side surface and the image side surface of the seventh lens are both concave; 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, and 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; the optical imaging lens satisfies: 7.69mm ≤ f × tan(HFOV) ≤ 9.27mm; and 33.65 < EP23 / T23 < 59.35; wherein, f is the effective focal length of the optical imaging lens, HFOV is half of the maximum field of view angle of the optical imaging lens, EP23 is the distance from the image side surface of the second spacer element to the object side surface of the third spacer element, and T23 is the air gap between the center of the image side surface of the second lens and the center of the object side surface of the third lens in the optical axis direction.

2. The optical imaging lens according to claim 1, characterized in that, The spacer assembly further includes a first spacer element disposed between the first lens and the second lens and in contact with the image side surface of the first lens, and the optical imaging lens satisfies: -43.12 ≤ f1 / EP01 ≤ -24.50; wherein, f1 is the effective focal length of the first lens, and EP01 is the distance between the object side surface of the lens barrel and the object side surface of the first spacer element.

3. The optical imaging lens according to claim 2, characterized in that, The optical imaging lens satisfies: -4.70 < f1 / (d1m + D1m) < -3.00; wherein, f1 is the effective focal length of the first lens, d1m is the inner diameter on the image side of the first spacer element, and D1m is the outer diameter on the image side of the first spacer element.

4. The optical imaging lens according to claim 1, wherein, The second lens is a convex lens, and the optical imaging lens satisfies: 2.25 < (D2m - d2s) / CT2 < 3.20; wherein, D2m is the outer diameter on the image side of the second spacer element, d2s is the inner diameter on the object side of the second spacer element, and CT2 is the central thickness of the second lens on the optical axis.

5. The optical imaging lens according to claim 1, characterized in that, The spacer assembly further includes a fourth spacer element disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, and the optical imaging lens satisfies: -18.25 < R8 / d4s × 10 < -14.40; wherein, R8 is the radius of curvature of the image side surface of the fourth lens, and d4s is the inner diameter on the object side of the fourth spacer element.

6. The optical imaging lens according to claim 5, characterized in that, The fourth lens is a glass lens, and the optical imaging lens satisfies: 58.65mm ≤ N4 × V4 × CP4 < 74.55mm; Wherein, N4 is the refractive index of the material of the fourth lens, V4 is the Abbe number of the material of the fourth lens, and CP4 is the maximum thickness of the fourth spacer element.

7. The optical imaging lens according to claim 1, wherein The spacer assembly further includes 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, and the optical imaging lens satisfies: 1.10 < (D0m - d6m) / f7 < 1.65; Wherein, D0m is the outer diameter of the image side of the lens barrel, d6m is the inner diameter of the image side of the sixth spacer element, and f7 is the effective focal length of the seventh lens.

8. The optical imaging lens according to any one of claims 1 to 7, characterized in that The optical imaging lens satisfies: -4.85 < f1 / L ≤ -3.10; Wherein, f1 is the effective focal length of the first lens, and L is the distance from the object side surface to the image side surface of the lens barrel.

9. The optical imaging lens according to claim 1, wherein The optical imaging lens satisfies: 1.95 < (D2m - d2m) / CP2 < 16.75; Wherein, D2m is the outer diameter of the image side surface of the second spacer element, d2m is the inner diameter of the image side surface of the second spacer element, and CP2 is the maximum thickness of the second spacer element.

10. The optical imaging lens according to claim 6, characterized in that, The optical imaging lens satisfies: 2.95 ≤ CP4 / T45 ≤ 5.05; Wherein, CP4 is the maximum thickness of the fourth spacer element, and T45 is the air gap in the optical axis direction between the center of the image side surface of the fourth lens and the center of the object side surface of the fifth lens.

11. The optical imaging lens according to claim 5, wherein The optical imaging lens satisfies: 8.70 < d4s / CP4 < 15.70; Wherein, d4s is the inner diameter of the object side surface of the fourth spacer element, and CP4 is the maximum thickness of the fourth spacer element.

12. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The optical imaging lens satisfies: 1.20 < D2m / d2m < 1.75; Wherein, D2m is the outer diameter of the image side surface of the second spacer element, and d2m is the inner diameter of the image side surface of the second spacer element.

13. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The optical imaging lens satisfies: 10.80 < L / BFL < 12.25; Wherein, L is the distance from the object side surface to the image side surface of the lens barrel, and BFL is the distance from the seventh lens to the image plane.

14. The optical imaging lens according to claim 5, characterized in that, The optical imaging lens satisfies: 1.20 < (d4s - d3m) / EP34 < 2.30; Wherein, d4s is the inner diameter of the object side surface of the fourth spacer element, d3m is the inner diameter of the image side surface of the third spacer element, and EP34 is the distance from the image side surface of the third spacer element to the object side surface of the fourth spacer element.

15. The optical imaging lens according to claim 2, wherein The optical imaging lens satisfies: 0.95 < EP12 / CT1 < 2.35; Wherein, EP12 is the distance from the image side surface of the first spacer element to the object side surface of the second spacer element, and CT1 is the central thickness of the first lens along the optical axis direction.

16. The optical imaging lens according to any one of claims 1 to 7, characterized in that, The optical imaging lens satisfies: 9.90mm < TD × tan(HFOV) < 12.05mm; and 14.15 ≤ D0m / L × 10 ≤ 16.10; Wherein, TD is the central distance in the optical axis direction from the object side surface of the first lens of the lens to the image side surface of the seventh lens, HFOV is half of the maximum field of view angle of the optical imaging lens, D0m is the outer diameter of the image side surface of the lens barrel, and L is the height of the lens barrel.

Images