Optical imaging lens

Abstract

The present application provides an optical imaging lens, comprising a lens barrel, a lens group and a spacer assembly housed within the lens barrel; the lens group comprises, arranged in sequence from the object side to the image side along the optical axis, a first lens having negative optical power, a second lens having positive optical power, a third lens having negative optical power, a fourth lens having positive optical power, a fifth lens having negative optical power, a sixth lens having positive optical power, and a seventh lens having negative optical power; the spacer assembly comprises 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 the following conditions: 7.69 mm ≤ f × tan (HFOV) ≤ 9.27 mm and 33.65 < EP23 / T23 < 59.35.

Description

Technical Field

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

[0002] As consumers' expectations for photography experience continue to rise, demand for handheld photography devices, such as action cameras, is showing a significant growth trend. These products offer portability, high flexibility, and excellent shooting performance, meeting the needs of users such as photography enthusiasts, outdoor 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, existing main camera lenses on the market, in pursuit of high-quality shooting performance, are often large in size, which to some extent limits the product's portability. Summary of the Invention

[0003] One advantage of the present application is that it provides an optical imaging lens that can achieve miniaturization of the lens through a more compact structural design while ensuring high performance, thereby meeting the needs of high-quality shooting and ensuring the portability of the product, and further enhancing the user's shooting experience.

[0004] The present application provides an optical imaging lens, comprising: a lens barrel, a lens group and a spacer assembly housed in the lens barrel; the lens group comprises: a first lens having negative focal power, a second lens having positive focal power, a third lens having negative focal power, a fourth lens having positive focal power, a fifth lens having negative focal power, a sixth lens having positive focal power, and a seventh lens having negative focal power, which are arranged in sequence from the object side to the image side along the optical axis; 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. is a concave surface; 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: 7.69mm≤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 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 placed 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.

[0006] 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.

[0007] According to some embodiments of the present application, the second lens is a convex lens, and the optical imaging lens satisfies the following conditions: 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 center 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 placed 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 curvature radius of the image side surface of the fourth lens, and d4s is the object side inner diameter 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; 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.

[0010] According to some embodiments of the present application, the spacer assembly further includes 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, and the optical imaging lens satisfies: 1.10<(D0m-d6m) / f7<1.65; wherein D0m is the image side outer diameter of the lens barrel, d6m is the image side inner diameter 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; wherein f1 is the effective focal length of the first lens, and L is the distance from the object side to the image side of the lens barrel.

[0012] According to some embodiments of the present application, the optical imaging lens satisfies the following conditions: 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.

[0013] According to some embodiments of the present application, the optical imaging lens satisfies the following condition: 2.95≤CP4 / T45≤5.05; wherein CP4 is the maximum thickness of the fourth spacer element, and T45 is the air space 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.

[0014] 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.

[0015] 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 spacer element, and d2m is the inner diameter of the image side surface 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; 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.

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

[0018] According to some embodiments of the present application, 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 center thickness of the first lens along the optical axis.

[0019] According to some embodiments of the present application, the optical imaging lens satisfies the following conditions: 9.90 mm < TD × tan (HFOV) < 12.05 mm; and 14.15 ≤ D0m / L × 10 ≤ 16.10; wherein TD is the center distance from the object side surface of the first lens element of the lens element to the image side surface of the seventh lens element in the optical axis direction, HFOV is half of the maximum field of view 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 surface and higher pixels compared to the main camera lens of a traditional sports camera. It can achieve miniaturization of the lens through a more compact structural design while ensuring high performance, which not only meets the high-quality shooting requirements but also ensures the portability of the product, and can further enhance the user's shooting experience. However, the optical imaging lens of the present application is prone to assembly instability in the environment of a large image surface, especially when the supporting step difference and gap between the second lens and the third lens are large, the flange position of the third lens is easily affected by the shear force and deformed, resulting in a larger rear profile after assembly, which in turn leads to a decrease in the edge field of view performance, causing the peripheral image to be blurred or unable to focus when the product is used. To this end, the present application can effectively ensure the uniformity of the structural distribution of the second lens and the third lens by controlling the distance from the image side of the second spacer element to the object side of the third spacer element, in conjunction with the air spacing distance between the centers of the second lens and the third lens in the optical axis direction, which is conducive 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 improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0025] Figure 5A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0026] Figure 5BSchematic diagrams of astigmatism curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0027] Figure 5C Schematic diagrams of distortion curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0028] Figure 5D Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

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

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

[0031] Figure 8 is a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0032] Figure 9A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0033] Figure 9B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0034] Figure 9C Schematic diagrams showing distortion curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0035] Figure 9D Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

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

[0037] Figure 11 is a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

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

[0039] Figure 13ASchematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0040] Figure 13B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0041] Figure 13C Schematic diagrams showing distortion curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0042] Figure 13D Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0043] Figure 14 The MTF defocus curve of the optical imaging lens when it satisfies the relationship EP23 / T23=36.7 is shown;

[0044] Figure 15 The MTF defocus curve of the optical imaging lens when it satisfies the relationship EP23 / T23=42.3 is shown;

[0045] Figure 16 The MTF defocus curve of the optical imaging lens is shown when the relationship EP23 / T23=31.9 is satisfied;

[0046] Figure 17 The MTF defocus curve of the optical imaging lens is shown when the relationship EP23 / T23=62.2 is satisfied. DETAILED DESCRIPTION

[0047] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0049] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0050] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it indicates that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it indicates that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to common methods in the art, for example, by determining whether it is concave or convex based on the positive or negative R value (R refers to the radius of curvature of the paraxial region). In this document, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, a positive R value indicates a convex surface, and a negative R value indicates a concave surface. For the image-side surface, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0051] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[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 commonly used dictionaries) 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 formal sense unless expressly defined as such herein.

[0053] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following examples only express several implementation methods of the present application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent of this application. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0054] According to one aspect of this application, Figure 1 As shown, one embodiment of the present application proposes an optical imaging lens, which may include a lens barrel and a lens group and a spacer assembly housed in the lens barrel; the lens group includes: a first lens with negative optical focal length, a second lens with positive optical focal length, a third lens with positive optical focal length, and a fourth lens with negative optical focal length, which are arranged in sequence from the object side to the image side along the optical axis; the spacer assembly includes a first spacer element placed on the image side of the first lens and in contact with the image side surface of the first lens, a second spacer element placed 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 placed on the image side of the third lens and in contact with the image side surface of the third lens.

[0055] like Figure 1 As shown, one embodiment of the present application provides an optical imaging lens, which may include a lens barrel and a lens group and a spacer assembly housed in the lens barrel; the lens group includes: 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, arranged in sequence from the object side to the image side along the optical axis; the object-side surface and the image-side surface of the first lens are concave and convex surfaces respectively; the object-side surface and the image-side surface of the second lens are both convex surfaces; the object-side surface and the image-side surface of the third lens are convex and concave surfaces respectively; the object-side surface and the image-side surface of the fourth lens are both convex surfaces; the object-side surface of the sixth lens is convex; and the object-side surface and the image-side surface of the seventh lens are both concave surfaces; 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 the following conditions: 7.69 mm ≤ f × tan (HFOV) ≤ 9.27 mm 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 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 distance 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.

[0057] It is worth noting that the optical imaging lens of this application has a larger image area and higher pixels compared to the main camera lens of traditional sports cameras. While ensuring high performance, it can achieve lens miniaturization through a more compact structural design, which not only meets the needs of high-quality shooting, but also ensures the portability of the product, and can further enhance the user's shooting experience.

[0058] However, the optical imaging lens of the present application is prone to assembly instability in an environment with a large image plane, especially when the supporting step difference and gap between the second lens and the third lens are large, the flange position of the third lens is easily affected by the shear force and deformed, resulting in a larger profile after assembly, which in turn leads to a decrease in the edge field of view performance, causing the peripheral image to be blurred or unable to focus when the product is used. To this end, the present application controls the distance from the image side of the second spacer element to the object side of the third spacer element, and cooperates with the air spacing distance between the centers of the second lens and the third lens in the optical axis direction, which can effectively ensure the uniformity of the structural distribution of the second lens and the third lens, which is conducive to achieving a compact lens structure and ensuring the assembly stability of the second lens and the third lens, thereby improving the overall assembly stability of the lens and improving the yield rate.

[0059] For example, Figure 14 The MTF defocus curve of the optical imaging lens when it satisfies the relationship EP23 / T23=36.7 is shown; Figure 15 The MTF defocus curve of the optical imaging lens when it satisfies the relationship EP23 / T23=42.3 is shown; Figure 16 The MTF defocus curve of the optical imaging lens is shown when the relationship EP23 / T23=31.9 is satisfied; Figure 17 The MTF defocus curve of the optical imaging lens is shown when it satisfies the relationship EP23 / T23=62.2. Figure 14 and Figure 15 It can be seen that when the relationship EP23 / T23 is greater than 33.65 and less than 59.35, the optical imaging lens parameter design is reasonable, the defocus curve trend is good, and the optical imaging lens has good imaging effect and assembly stability. Figure 16It can be seen that when the relationship EP23 / T23 is less than 33.65, the light refraction is steep, causing the field curvature shift and peak drop of the external field of view, resulting in poor imaging effect of the optical imaging lens. Figure 17 It can be seen that when the relationship EP23 / T23 is greater than 59.35, the supporting stability of the lens decreases, causing the field curvature shift and peak drop of the outer field of view, resulting in poor imaging effect of the optical imaging lens.

[0060] Preferably, the optical imaging device satisfies: 7.69 mm ≤ f×tan(HFOV) ≤ 9.27 mm 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 placed 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 degree of concavity and convexity of the shape of the first lens can be effectively controlled. By 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 relationship, the angle of the light emitted from the edge of the first lens can be effectively controlled. Combined with the image side inner diameter of the first spacer element, the excess stray light can be effectively intercepted to ensure the purity of the image.

[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 the following conditions: 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 center 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, the center thickness of the second lens can be controlled by the above relationship, which can control the degree of convergence of light by the second lens to a certain extent, thereby ensuring the imaging effect. In addition, by controlling the image-side outer diameter and object-side inner diameter of the second spacer element, a large supporting misalignment between the second lens and the third lens can be avoided, thereby 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 placed 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 curvature radius of the image side surface of the fourth lens, and d4s is the object side inner diameter of the fourth spacer element.

[0070] Thus, the above relationship can effectively control the angle of light emitted from the edge of the fourth lens. In addition, by controlling the object-side inner diameter of the fourth spacer element, the range of light emitted from the edge of the fourth lens can be reasonably controlled, intercepting large-angle stray light 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; 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.

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

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

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

[0076] In this way, by controlling the relationship between the image-side outer diameter of the lens barrel, the image-side inner diameter of the sixth spacer element, and the effective focal length of the seventh lens through the above-mentioned relationship, the overall shape of the lens barrel and the rationality of the distribution of the spacer element sizes can be effectively controlled, thereby ensuring the compactness of the optical system; in addition, the seventh lens is the last lens, and by controlling the effective focal length of the seventh lens, the angular range of the output light of the lens can be controlled, thereby ensuring the matching of the lens and 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; wherein f1 is the effective focal length of the first lens, and L is the distance from the object side to the image side of the lens barrel.

[0079] In this way, the height of the entire lens can be effectively controlled by the above relationship, ensuring 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 the following conditions: 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.

[0082] In this way, by controlling the inner and outer diameters of the second spacer element, the range of the emitted 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 supporting length. Combined with controlling the thickness of the second spacer element within a reasonable range, the supporting stability between the third lens and the second lens can be guaranteed, thereby improving the assembly yield.

[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 the following condition: 2.95≤CP4 / T45≤5.05; wherein CP4 is the maximum thickness of the fourth spacer element, and T45 is the air space 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 help improve temperature drift and reduce dispersion in the optical system. Using the above relationship, the air gap between the fourth lens and the fifth lens is controlled to remain within a reasonable range, which helps to reduce imaging errors caused by slight displacement between the lenses. It can effectively reduce the sensitivity of the gap between the fourth lens and the fifth lens, and improve 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] Thus, by controlling the thickness of the fourth spacer element using the aforementioned relationship, the edge thickness of the fifth lens can be controlled within a certain range, thereby controlling the thickness difference between the flange position of the fifth lens and the optical portion, thereby ensuring the moldability of the fifth lens. Furthermore, by controlling the inner diameter of the object-side surface of the fourth spacer element, the light clearance diameter at the edge of the third lens can be controlled, which helps to ensure a certain relative illumination, achieve a more uniform imaging brightness distribution in the optical system, and thus improve 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 spacer element, and d2m is the inner diameter of the image side surface of the second spacer element.

[0090] In this way, by controlling the inner and outer diameters of the image-side surface of the second spacer element, the range of 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 relationship, the overall height and total mechanical length of the lens can be effectively controlled, which is conducive to distinguishing the differences in the outer contours of the entire lens barrel structure, effectively controlling the coordination between the lens and the module, reasonably arranging the position of the spacer elements, and reducing the generation of lens stray light.

[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 the following condition: 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.

[0096] In this way, by controlling the distance from the image-side surface of the third spacer element to the object-side surface of the fourth spacer element using the above relationship, the flange thickness of the fourth lens can be controlled within a reasonable range, ensuring the strength of the structural part, thereby reducing the difficulty of molding 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; 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 center thickness of the first lens along the optical axis.

[0099] Thus, by controlling the distance from the image-side surface of the first spacer element to the object-side surface of the second spacer element, the edge thickness of the second lens can be controlled, thereby ensuring reasonable formability of the second lens. In addition, by controlling the center thickness of the first lens on the optical axis, the uniformity of the overall structural distribution of the first and second lenses can be ensured, thereby improving 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 the following conditions: 9.90 mm < TD × tan (HFOV) < 12.05 mm and 14.15 ≤ D0m / L × 10 ≤ 16.10; wherein TD is the center distance from the object side surface of the first lens element to the image side surface of the seventh lens element in the optical axis direction, HFOV is half of the maximum field of view 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.

[0102] In this way, through the above relationship, the relationship between the distance from the first lens to the image side surface of the seventh lens and the maximum field of view 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, thereby ensuring the miniaturization of the optical system.

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

[0104] It should be noted that those skilled in the art will appreciate that, without departing from the claimed technical solution, the number of spacer elements in the optical imaging lens may be varied to achieve the various results and advantages described herein, and this application does not impose specific limitations thereon. For example, the optical imaging lens may include a different number of spacer elements than those described in the above embodiments, as needed.

[0105] Some specific but non-limiting examples of the above-mentioned embodiments of the present application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ denotes an object plane (not shown) of the optical imaging lens, STO denotes a surface of a stop (not shown), S1 denotes an object-side surface of the first lens element E1, S2 denotes an image-side surface of the first lens element E1, S3 denotes an object-side surface of the second lens element E2, S4 denotes an image-side surface of the second lens element E2, S5 denotes an object-side surface of the third lens element E3, S6 denotes an image-side surface of the third lens element E3, S7 denotes an object-side surface of the fourth lens element E4, S8 denotes an image-side surface of the fourth lens element E4, S9 denotes an object-side surface of the fifth lens element E5, S10 denotes an image-side surface of the fifth lens element E5, S11 denotes an object-side surface of the sixth lens element E6, S12 denotes an image-side surface of the sixth lens element E6, S13 denotes an object-side surface of the seventh lens element E7, S14 denotes an image-side surface of the seventh lens element E7, S15 may denote an object-side surface of a filter (not shown), S16 may denote an image-side surface of the filter (not shown), and S17 denotes an image plane (not shown) of the optical imaging lens. In addition, Aj represents the j-th order aspheric coefficient, where j=4, 6, 8, 10, 12, 14, 16.

[0106] Example 1

[0107] like Figure 2As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

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

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

[0111] Table 1: Basic optical parameters of the optical imaging lens of Example 1

[0112]

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

[0114] ;

[0115] Where x is the distance vector from the vertex of the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspheric surface. Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspheric mirror surface S1 to S14 in Example 1.

[0116] Table 2: Aspheric coefficients of the optical imaging lens of Example 1

[0117]

[0118] Example 2

[0119] like Figure 3As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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 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, 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.

[0121] It is noteworthy that the optical imaging lens of Example 2 has the same white object structure as that of Example 1. That is, the basic optical parameter table of the optical imaging lens of Example 2 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of Example 2 has a different black object structure than that of Example 1. That is, the difference between Example 2 and Example 1 lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical imaging lens.

[0122] Specifically, the values of the various relevant structural parameters in the second embodiment and the above-mentioned first embodiment are respectively 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 image side inner diameter d7s of the lens barrel P0 The distance EP01 between the object side surface 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 units of the values of the parameters shown in Table 8 are all millimeters (mm), and the schematic diagram of the parameters in the structural diagram of the optical imaging lens is as follows: Figure 1 shown.

[0123] Example 3

[0124] like Figure 4 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

[0125] 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, 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.

[0126] It is noteworthy that the optical imaging lens of Example 3 has the same white object structure as that of Example 1. Specifically, the basic optical parameter table of the optical imaging lens of Example 3 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. However, the optical imaging lens of Example 3 has a different black object structure than that of Example 1. Specifically, the difference between Example 3 and Example 1 lies in the different dimensional values of certain structural parameters of the lens barrel and spacer assembly in the optical imaging lens. Specifically, the values of the relevant structural parameters of Example 3 are shown in Table 8 below. The detailed description of the various black object parameters is the same as that of Example 2 above and will not be repeated here.

[0127] After simulation test, the axial chromatic aberration curves of the optical imaging lenses in Example 1, Example 2 and Example 3 are as follows: Figure 5A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 1, Example 2 and Example 3 are shown in FIG. Figure 5B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the optical imaging lens in Example 1, Example 2 and Example 3 are shown as Figure 5C As shown in FIG, it shows the distortion at different field angles; the magnification chromatic aberration curves of the optical imaging lens in Example 1, Example 2 and Example 3 are shown in FIG. Figure 5D As shown in , it shows the magnification change of light of different wavelengths when imaging. 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] Example 4

[0129] like Figure 6As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

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

[0132] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Example 4, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0133] Table 3: Basic optical parameters of the optical imaging lens of Example 4

[0134]

[0135] In this embodiment, both the object-side and image-side surfaces of each of the first through seventh lenses E1 through E7 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas described in Example 1. Table 4 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspheric surfaces S1 through S14 that can be used in Example 4.

[0136] Table 4: Aspheric coefficients of the optical imaging lens of Example 4

[0137]

[0138] Example 5

[0139] like Figure 7 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

[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 is noteworthy that the optical imaging lens of Example 5 has the same white object structure as that of Example 4. Specifically, the basic optical parameter table of the optical imaging lens of Example 5 is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of Example 5 has a different black object structure than that of Example 4. Specifically, the difference between Example 5 and Example 4 lies in the different dimensional values of certain structural parameters of the lens barrel and spacer assembly in the optical imaging lens. Specifically, the values of the relevant structural parameters of Example 5 are shown in Table 8 below. The detailed description of the various black object parameters is the same as that of Example 2 above and will not be repeated here.

[0142] Example 6

[0143] like Figure 8As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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 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, 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.

[0145] It is noteworthy that the optical imaging lens of Example 6 has the same white object structure as that of Example 4. Specifically, the basic optical parameter table of the optical imaging lens of Example 6 is the same as Table 3, and the aspheric coefficient table is the same as Table 4. However, the optical imaging lens of Example 6 has a different black object structure than that of Example 4. Specifically, the difference between Example 6 and Example 4 lies in the different dimensional values of certain structural parameters of the lens barrel and spacer assembly in the optical imaging lens. Specifically, the values of the relevant structural parameters of Example 6 are shown in Table 8 below. The detailed description of the various black object parameters is the same as that of Example 2 above and will not be repeated here.

[0146] After simulation tests, the axial chromatic aberration curves of the optical imaging lenses in Examples 4, 5 and 6 are as follows: Figure 9A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 4, Example 5 and Example 6 are shown in FIG. Figure 9B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the optical imaging lens in Example 4, Example 5 and Example 6 are shown as Figure 9C As shown in FIG, it shows the distortion at different field angles; the magnification chromatic aberration curves of the optical imaging lens in Example 4, Example 5 and Example 6 are shown in FIG. Figure 9D As shown in , it shows the magnification change of light of different wavelengths when imaging. Figure 9A 、 Figure 9B 、 Figure 9C and Figure 9D It can be seen that the optical imaging lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0147] Example 7

[0148] like Figure 10 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

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

[0151] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius and thickness / distance are all millimeters (mm).

[0152] Table 5: Basic optical parameters of the optical imaging lens of Example 7

[0153]

[0154] In this embodiment, both the object-side and image-side surfaces of each of the first through sixth lenses E1 through E6 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas given in Example 1. Table 6 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspheric surfaces S1 through S14 that can be used in Example 7.

[0155] Table 6: Aspheric coefficients of the optical imaging lens of Example 7

[0156]

[0157] Example 8

[0158] like Figure 11As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

[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 is noteworthy that the optical imaging lens of Example 8 has the same white object structure as that of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 8 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of Example 8 has a different black object structure than that of Example 7. Specifically, the difference between Example 8 and Example 7 lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical imaging lens. Specifically, the values of the relevant structural parameters of Example 8 are shown in Table 8 below. The detailed description of the various black object parameters is the same as that of Example 2 above and will not be repeated here.

[0161] Example 9

[0162] like Figure 12 As shown, in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group comprises, 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 positive focal power, a third lens E3 with negative focal power, a fourth lens E4 with positive focal power, a fifth lens E5 with negative focal power, a sixth lens E6 with positive focal power, and a seventh lens E7 with negative focal power; the spacer assembly comprises a lens disposed between the first lens E1 and the second lens E2 and adjacent to the first lens E1. a first spacing element P1 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 second spacing element P2 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 spacing element P4 disposed between the fourth lens E4 and the fifth lens E5 and in contact with the image side surface of the fourth lens E4, and a sixth spacing 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.

[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 is noteworthy that the optical imaging lens of Example 9 has the same white object structure as that of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 9 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. However, the optical imaging lens of Example 9 has a different black object structure than that of Example 7. Specifically, the difference between Example 9 and Example 7 lies in the different dimensional values of some structural parameters of the lens barrel and spacer assembly in the optical imaging lens. Specifically, the values of the relevant structural parameters of Example 9 are shown in Table 8 below. The detailed description of the various black object parameters is the same as that of Example 2 above and will not be repeated here.

[0165] After simulation tests, the axial chromatic aberration curves of the optical imaging lenses in Examples 7, 8 and 9 are as follows: Figure 13A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 7, Example 8 and Example 9 are shown in FIG. Figure 13B As shown in FIG, it represents the degree of meridional image curvature and sagittal image curvature; the distortion curves of the optical imaging lens in Example 7, Example 8 and Example 9 are shown in FIG. Figure 13C As shown in FIG, it shows the distortion at different field angles; the magnification chromatic aberration curves of the optical imaging lens in Example 7, Example 8 and Example 9 are shown in FIG. Figure 13D As shown in , it shows the magnification change of light of different wavelengths when imaging. 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 Examples 1 to 9, half the maximum field of view 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 element E1 and the seventh lens element E7 in the optical imaging lens are respectively as shown in Table 7 below.

[0167] Table 7: System optical parameters of optical imaging lens

[0168]

[0169] In addition, the black object structural parameters of the optical imaging lens in Examples 1 to 9 are specifically shown in Table 8.

[0170] Table 8: Black object structure parameters of optical imaging lens

[0171]

[0172] In summary, the optical imaging lenses in Examples 1 to 9 satisfy the relationship shown in Table 9, as shown in Table 9.

[0173] Table 9: Relationships satisfied by optical imaging lenses

[0174]

[0175] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0176] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that: include: A lens barrel and a lens group and a spacer assembly housed therein; the lens group comprises: a first lens having negative optical power, a second lens having positive optical power, a third lens having negative optical power, a fourth lens having positive optical power, a fifth lens having negative optical power, a sixth lens having positive optical power, and a seventh lens having negative optical power, arranged in sequence from the object side to the image side along the optical axis; 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 comprises 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: 7.69 mm ≤ f × tan(HFOV) ≤ 9.27 mm; 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 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 distance 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, wherein: 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, wherein: The optical imaging lens meets the following requirements: -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.

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 of the second spacer element on the image side, d2s is the inner diameter of the second spacer element on the object side, and CT2 is the center thickness of the second lens on the optical axis.

5. The optical imaging lens according to claim 1, wherein: 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 curvature radius of the image side surface of the fourth lens, and d4s is the object side inner diameter of the fourth spacer element.

6. The optical imaging lens according to claim 5, wherein: The fourth lens is a glass lens, and the optical imaging lens meets the following requirements: 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 lens barrel on the image side, d6m is the inner diameter of the sixth spacer element on the image side, 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, wherein: The optical imaging lens meets the following requirements: -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 to the image side of the lens barrel.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 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, wherein: The optical imaging lens meets the following requirements: 2.95≤CP4 / T45≤5.05; Wherein, CP4 is the maximum thickness of the fourth spacer element, and T45 is the air space 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.

11. The optical imaging lens according to claim 5, wherein: The optical imaging lens meets the following requirements: 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.

12. The optical imaging lens according to any one of claims 1 to 7, wherein: The optical imaging lens meets the following requirements: 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.

13. The optical imaging lens according to any one of claims 1 to 7, wherein: The optical imaging lens meets the following requirements: 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.

14. The optical imaging lens according to claim 5, wherein: The optical imaging lens meets the following requirements: 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 meets the following requirements: 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 center thickness of the first lens along the optical axis.

16. The optical imaging lens according to any one of claims 1 to 7, wherein: The optical imaging lens meets the following requirements: 9.90 mm < TD × tan(HFOV) < 12.05 mm; and 14.15≤D0m / L×10≤16.10; Wherein, TD is the center distance from the object side surface of the first lens of the lens to the image side surface of the seventh lens in the optical axis direction, 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.

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