Optical imaging lens

Abstract

The application provides an optical imaging lens, comprising a lens barrel, a lens set and a plurality of spacer elements accommodated in the lens barrel; the lens set comprises, in sequence from the object side to the image side along the optical axis: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; at least one spacer element is arranged between any two adjacent lenses in the optical imaging lens, the plurality of spacer elements comprises a sixth spacer element arranged on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and a seventh spacer element arranged on the image side of the seventh lens and in contact with the image side surface of the seventh lens; the optical imaging lens satisfies: 3.15 < R13 / T67 ≤ 7.22; 1.60 < CP7 / (d7m-d7s) ≤ 2.71; and 1.30 < d6s / f6 < 1.90.

Description

Technical Field

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

[0002] With the rapid iteration and upgrading of smart electronic devices (such as smartphones, tablets, and personal computers), the market's performance requirements for camera lenses in these products are increasing. Against this backdrop, mobile phone manufacturers are continuously increasing the size of the imaging medium (commonly known as the "sensor")—here, "sensor" originally referred to the film negative in traditional photography, but in the digital age it has evolved into the image sensor, although the term is still used today. It is worth noting that with the gradual increase in the effective image area of ​​the lens, stray light between lens elements and ghosting phenomena have emerged in large quantities, significantly negatively impacting the overall image quality of the lens.

[0003] To address the issue of stray light easily appearing at the rear of large image sensors, some lenses employ methods such as controlling the degree of light deflection by the last lens element to balance the optical power distribution and avoid astigmatism caused by excessive lens bending. However, this still cannot prevent stray light reflected from the non-effective diameter positions of the last two lenses. Summary of the Invention

[0004] One advantage of this application is that it provides an optical imaging lens that can achieve an optimized distribution of optical power by adjusting the degree of light deflection of each lens, thereby effectively reducing astigmatism caused by excessive optical bending.

[0005] This application provides an optical imaging lens, including a lens barrel and a lens group and a plurality of spacers housed within the lens barrel; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power, wherein the object-side and image-side of the first lens are convex and concave, respectively; the object-side and image-side of the second lens are convex and concave, respectively; the object-side and image-side of the third lens are convex and concave, respectively; the object-side and image-side of the fourth lens are both convex; the object-side and image-side of the fifth lens are convex and concave, respectively; the object-side and image-side of the sixth lens are convex and concave, respectively; and the object-side and image-side of the seventh lens are convex and concave, respectively. The optical imaging lens includes at least one of the aforementioned spacer elements between two adjacent lenses. The plurality of spacer elements includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and a seventh spacer element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens. The optical imaging lens satisfies: 3.15 < R13 / T67 ≤ 7.22; 1.60 < CP7 / (d7m-d7s) ≤ 2.71; and 1.30 < d6s / f6 < 1.90. Wherein, R13 is the radius of curvature of the object side surface of the seventh lens, T67 is the air gap between the sixth and seventh lenses on the optical axis, CP7 is the maximum thickness of the seventh spacer element along the optical axis, d7m is the inner diameter of the image side surface of the seventh spacer element, d7s is the inner diameter of the object side surface of the seventh spacer element, d6s is the inner diameter of the object side surface of the sixth spacer element, and f6 is the effective focal length of the sixth lens.

[0006] In some embodiments of this application, the plurality of spacers further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, wherein the optical imaging lens satisfies: 2.20 < R1 / EP01 < 2.70; where R1 is the radius of curvature of the object side surface of the first lens, and EP01 is the distance along the optical axis from the object side surface of the lens barrel to the object side surface of the first spacer element.

[0007] In some embodiments of this application, the plurality of spacers further includes a second spacer disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 13.99≤(CT1+CT2) / T12≤15.00; and -8.45≤f2 / d2s≤-6.70; wherein CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, T12 is the air gap between the first lens and the second lens on the optical axis, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side surface of the second spacer.

[0008] In some embodiments of this application, the plurality of spacers further include a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens, a second spacer element disposed on the image side of the second lens and in contact with the image side 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 of the third lens. The optical imaging lens satisfies: 0.85≤EP23 / EP12<1.45; where EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, and EP12 is the distance along the optical axis from the image side of the first spacer element to the object side of the second spacer element.

[0009] In some embodiments of this application, the plurality of spacers further includes a second spacer disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 7.88≤D2s / T23<9.70; where D2s is the outer diameter of the object side surface of the second spacer, and T23 is the air gap between the second lens and the third lens on the optical axis.

[0010] In some embodiments of this application, the plurality of spacers further includes a fourth spacer disposed on the image side of the fourth lens and in contact with the image side of the fourth lens, wherein the optical imaging lens satisfies: 1.80 < T34 / CP4 < 2.70; where T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacer along the optical axis.

[0011] In some embodiments of this application, the plurality of spacers further include a third spacer disposed on the image side of the third lens and in contact with the image side of the third lens, and a fourth spacer disposed on the image side of the fourth lens and in contact with the image side of the fourth lens, wherein the optical imaging lens satisfies: 24.24≤f4 / EP34≤41.14; where f4 is the effective focal length of the fourth lens, and EP34 is the distance along the optical axis from the image side of the third spacer to the object side of the fourth spacer.

[0012] In some embodiments of this application, the plurality of spacers further includes a fourth spacer disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: -3.90 < R8 / d4s < -2.35; 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 surface of the fourth spacer.

[0013] In some embodiments of this application, the plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 2.09≤d5s / R11<3.80; where d5s is the inner diameter of the object side surface of the fifth spacer element and R11 is the radius of curvature of the object side surface of the sixth lens.

[0014] In some embodiments of this application, the plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 1.80≤(EP56+CP6) / CT6<2.40; wherein EP56 is the distance along the optical axis from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element, CP6 is the maximum thickness of the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0015] In some embodiments of this application, the plurality of spacers further includes a fifth spacer disposed on the image side of the fifth lens and in contact with the image side of the fifth lens, wherein the optical imaging lens satisfies: -1.40 < SAG61 / EP56 ≤ -0.88; wherein SAG61 is the displacement along the optical axis from the intersection of the object side of the sixth lens and the optical axis to the vertex of the optical effective radius of the object side of the sixth lens, and EP56 is the distance along the optical axis from the image side of the fifth spacer to the object side of the sixth spacer.

[0016] In some embodiments of this application, the optical imaging lens satisfies: 1.93≤(D6m-D6s) / CP6<3.10; where D6m is the outer diameter of the image side of the sixth spacer element, D6s is the outer diameter of the object side of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element along the optical axis.

[0017] In some embodiments of this application, the plurality of spacers further includes a sixth auxiliary spacer element disposed on the image side of the sixth spacer element and in contact with the image side of the sixth spacer element, wherein the optical imaging lens satisfies: -3.30 < EP67 / (D7s-D6bm) ≤ -2.69; where EP67 is the distance along the optical axis from the image side of the sixth spacer element to the object side of the seventh spacer element, D7s is the outer diameter of the object side of the seventh spacer element, and D6bm is the outer diameter of the image side of the auxiliary element of the sixth spacer element.

[0018] In some embodiments of this application, the optical imaging lens satisfies: 2.80 < d0m / DT0s ≤ 3.36; where d0m is the inner diameter of the image side of the lens barrel, and DT0s is the light-transmitting aperture of the object side of the lens barrel.

[0019] In some embodiments of this application, the optical imaging lens satisfies: 1.35 < TD / (D0m - D0s) ≤ 1.86; where TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, D0m is the outer diameter of the image side of the lens barrel, and D0s is the outer diameter of the object side of the lens barrel.

[0020] In some embodiments of this application, the optical imaging lens satisfies: 7.22mm≤d0m / ImgH×EPD≤8.00mm; where d0m is the inner diameter of the image side of the lens barrel, ImgH is half the diagonal length of the effective pixel area of ​​the imaging surface of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0021] In summary, the optical imaging lens of this application, by controlling the ratio of the radius of curvature of the object-side surface of the seventh lens and the air gap between the sixth and seventh lenses on the optical axis to satisfy the relationship 3.15 < R13 / T67 ≤ 7.22, can control the degree of light deflection by the seventh lens, balance the optical power distribution, and avoid astigmatism caused by excessive bending. However, it is still impossible to avoid stray light reflections generated by the sixth and seventh lenses at positions with non-effective diameters. To this end, this application controls the ratio of the maximum thickness of the seventh spacer element along the optical axis to the difference between the inner diameter of the image side and the inner diameter of the object side of the seventh spacer element to satisfy the relationship 1.60 < CP7 / (d7m - d7s) ≤ 2.71, and controls the ratio of the inner diameter of the object side of the sixth spacer element to the effective focal length of the sixth lens to satisfy the relationship 1.30 < d6s / f6 < 1.90. By comprehensively coordinating the structural dimensions, the light-passing aperture of the spacer element in the rear section of the optical imaging lens is controlled, ensuring sufficient light intake while maintaining the mechanical strength of the rear section of the lens. Since the sixth and seventh lenses have positive and negative optical powers respectively, by controlling the value of d6s / f6, stray light at non-effective diameter positions can be reduced, allowing light to reach the imaging surface better and improving image quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structural parameters of an optical imaging lens according to one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application;

[0024] Figure 3 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application;

[0025] Figure 4 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application;

[0026] Figure 5 A schematic diagram of the on-axis chromatic aberration curves of the optical imaging lenses according to the above-described embodiments one, two, and three of this application is shown.

[0027] Figure 6 A schematic diagram of the astigmatism curves of the optical imaging lenses according to the above-described Embodiment 1, Embodiment 2 and Embodiment 3 of this application is shown.

[0028] Figure 7 The diagram shows the distortion curves of the optical imaging lenses according to the above-described embodiments one, two, and three of this application.

[0029] Figure 8This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application;

[0030] Figure 9 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application;

[0031] Figure 10 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Six of this application;

[0032] Figure 11 A schematic diagram of the on-axis chromatic aberration curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0033] Figure 12 A schematic diagram of the astigmatism curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0034] Figure 13 A schematic diagram of the distortion curves of the optical imaging lenses according to Embodiments 4, 5 and 6 of this application is shown.

[0035] Figure 14 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Seven of this application;

[0036] Figure 15 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application;

[0037] Figure 16 This is a schematic diagram of the structure of an optical imaging lens according to Embodiment Nine of this application;

[0038] Figure 17 A schematic diagram of the on-axis chromatic aberration curve of the optical imaging lens according to Embodiments 7, 8 and 9 of this application is shown.

[0039] Figure 18 A schematic diagram of the astigmatism curves of the optical imaging lenses according to Embodiments 7, 8 and 9 of this application is shown.

[0040] Figure 19 A schematic diagram of the distortion curves of the optical imaging lenses according to Embodiments 7, 8 and 9 of this application is shown.

[0041] Figure 20 A schematic diagram of stray light spots is shown for an optical imaging lens when R13 / T67=4.54, CP7 / (d7m-d7s)=1.78 and d6s / f6=1.37.

[0042] Figure 21A schematic diagram of stray light spots is shown for an optical imaging lens when R13 / T67=4.54, CP7 / (d7m-d7s)=2.19 and d6s / f6=1.34.

[0043] Figure 22 A schematic diagram of stray light spots is shown for an optical imaging lens that satisfies R13 / T67=4.54, CP7 / (d7m-d7s)=3.14 and d6s / f6=2.80;

[0044] Figure 23 A schematic diagram of stray light spots is shown for an optical imaging lens when R13 / T67=4.54, CP7 / (d7m-d7s)=0.89 and d6s / f6=0.53. Detailed Implementation

[0045] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0046] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0047] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0048] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, 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, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0049] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0050] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] According to one aspect of this application, such as Figure 1As shown, one embodiment of this application proposes an optical imaging lens, including a lens barrel and a lens group and a plurality of spacers housed within the lens barrel; the lens group includes, arranged sequentially along the optical axis from the object side to the image side: a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power, wherein the object-side and image-side of the first lens are convex and concave, respectively, the object-side and image-side of the second lens are convex and concave, respectively, and the third lens... The object-side surface and image-side surface of the fourth lens are convex and concave, respectively. The object-side surface and image-side surface of the fifth lens are convex and concave, respectively. The object-side surface and image-side surface of the sixth lens are convex and concave, respectively. The object-side surface and image-side surface of the seventh lens are convex and concave, respectively. At least one of the aforementioned spacer elements is included between any two adjacent lenses in the optical imaging lens. The plurality of spacer elements include a sixth spacer element disposed on the image-side surface of the sixth lens and in contact with the image-side surface of the sixth lens, and a seventh spacer element disposed on the image-side surface of the seventh lens and in contact with the image-side surface of the seventh lens.

[0053] The optical imaging lens satisfies the following conditions: 3.15 < R13 / T67 ≤ 7.22; 1.60 < CP7 / (d7m-d7s) ≤ 2.71; and 1.30 < d6s / f6 < 1.90; where R13 is the radius of curvature of the object-side surface of the seventh lens, T67 is the air gap between the sixth and seventh lenses on the optical axis, CP7 is the maximum thickness of the seventh spacer element along the optical axis, d7m is the inner diameter of the image-side surface of the seventh spacer element, d7s is the inner diameter of the object-side surface of the seventh spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and f6 is the effective focal length of the sixth lens.

[0054] It is worth noting that for large image sensors, a large amount of stray light is prone to appear at the rear end of the lens. This application controls the degree of light deflection by the seventh lens by controlling the ratio of the radius of curvature of the object side of the seventh lens and the air gap between the sixth and seventh lenses on the optical axis to satisfy the relationship 3.15 < R13 / T67 ≤ 7.22, thereby balancing the optical power distribution and avoiding astigmatism caused by excessive bending. However, it is still impossible to avoid the stray light reflected from the sixth and seventh lenses at positions with non-effective diameters. To this end, this application controls the ratio of the maximum thickness of the seventh spacer element along the optical axis to the difference between the inner diameter of the image side and the inner diameter of the object side of the seventh spacer element to satisfy the relationship 1.60 < CP7 / (d7m - d7s) ≤ 2.71, and controls the ratio of the inner diameter of the object side of the sixth spacer element to the effective focal length of the sixth lens to satisfy the relationship 1.30 < d6s / f6 < 1.90. By comprehensively coordinating the structural dimensions, the light-passing aperture of the spacer element in the rear section of the optical imaging lens is controlled, ensuring sufficient light intake while maintaining the mechanical strength of the rear section of the lens. Since the sixth and seventh lenses have positive and negative optical powers respectively, by controlling the value of d6s / f6, stray light at non-effective diameter positions can be reduced, allowing light to reach the imaging surface better and improving image quality.

[0055] For example, Figure 20 A schematic diagram of stray light spots is shown for an optical imaging lens that satisfies R13 / T67=4.54, CP7 / (d7m-d7s)=1.78, and d6s / f6=1.37. Figure 21 A schematic diagram of stray light spots is shown for an optical imaging lens that satisfies R13 / T67=4.54, CP7 / (d7m-d7s)=2.19, and d6s / f6=1.34. Figure 22 A schematic diagram of stray light spots is shown for an optical imaging lens that satisfies R13 / T67=4.54, CP7 / (d7m-d7s)=3.14, and d6s / f6=2.80. Figure 23 A schematic diagram of stray light spots is shown for an optical imaging lens satisfying R13 / T67=4.54, CP7 / (d7m-d7s)=0.89, and d6s / f6=0.53. It is easy to see from the diagram that, as... Figure 20 and Figure 21 As shown in the schematic diagram of stray light spots, the relatively small number of stray light spots indicates that when the relation CP7 / (d7m-d7s) is greater than 1.60 and less than or equal to 2.71, and the relation d6s / f6 is greater than 1.30 and less than 1.90, the optical imaging lens structure is reasonably set, the light path is relatively uniform, and the stray light energy is low. Figure 22As shown in the schematic diagram of stray light spots, there are many stray light spots, indicating that when the relation CP7 / (d7m-d7s) is greater than 2.71 and the relation d6s / f6 is greater than or equal to 1.90, the structural dimensions of the optical imaging lens are not reasonably designed, the light path is uneven, the light is steep, and it is easy to generate stray light reflected between lenses and primary stray light reflected by the spacer element. Figure 23 As shown in the schematic diagram of stray light spots, there are many stray light spots, indicating that when the relation CP7 / (d7m-d7s) is less than 1.60 and the relation d6s / f6 is less than 1.30, the parameter settings of the optical imaging lens are unreasonable. The inner diameter of the sixth spacer element is too small, which leads to darkening of the edge field of view. In addition, the seventh spacer element is too thin, which will lead to tolerance sensitivity, weaken the axis accuracy, and easily produce unexpected reflected stray light at the lens edge.

[0056] According to some embodiments of this application, the plurality of spacers further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, wherein the optical imaging lens satisfies: 2.20 < R1 / EP01 < 2.70; where R1 is the radius of curvature of the object side surface of the first lens, and EP01 is the distance along the optical axis from the object side surface of the lens barrel to the object side surface of the first spacer element.

[0057] In this way, by controlling the relevant dimensions of the first lens and the first spacer element to satisfy the above relationship, the shape of the first lens can be effectively controlled, the incident angle and refraction path of light can be effectively controlled, aberrations (such as spherical aberration and coma) can be reduced, and the image clarity can be improved. At the same time, it also helps to control the wall thickness of the lens barrel and improve the assembly performance of the lens.

[0058] According to some embodiments of this application, the plurality of spacers further includes a second spacer disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 13.99≤(CT1+CT2) / T12≤15.00; and -8.45≤f2 / d2s≤-6.70; wherein CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, T12 is the air gap between the first lens and the second lens on the optical axis, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side surface of the second spacer.

[0059] Thus, under the premise of meeting the requirements of ultra-thin and large image plane in optical imaging lenses, by controlling the relevant dimensions of the first and second lenses to satisfy the relationship 13.99≤(CT1+CT2) / T12≤15.00, the ratio of the sum of the center thicknesses of the first and second lenses to the air gap between the lenses is relatively large, making the ratio of the total thickness of the lens group to the air gap more reasonable, thereby balancing optical performance and mechanical stability. However, this ratio directly affects the optical path length and aberration correction capability. Therefore, by constraining the ratio of the effective focal length (f2) of the second lens to the inner diameter (d2s) of the object side of the second spacer element, where f2 is a negative value, the light diverges appropriately after passing through the second lens. By controlling the relevant dimensions of the first lens, the second lens, and the second spacer element to satisfy the relationship -8.45≤f2 / d2s≤-6.70, the aperture of the spacer element is controlled, excess light is intercepted, and stray light reflected between the second lenses is improved. By satisfying the above conditions for the structural dimensions, it is possible to ensure that the optical imaging lens is miniaturized while maintaining high optical performance.

[0060] According to some embodiments of this application, the plurality of spacers further includes a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens, a second spacer element disposed on the image side of the second lens and in contact with the image side 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 of the third lens. The optical imaging lens satisfies: 0.85≤EP23 / EP12<1.45; where EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, and EP12 is the distance along the optical axis from the image side of the first spacer element to the object side of the second spacer element.

[0061] In this way, by controlling the relevant dimensions of the second and third spacer elements to satisfy the above relationship, it is ensured that the optical components have reasonable tolerance limits during mechanical assembly, avoiding optical axis offset caused by temperature changes or vibrations, effectively adjusting the propagation path of light and improving imaging quality.

[0062] According to some embodiments of this application, the plurality of spacers further includes a second spacer disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 7.88≤D2s / T23<9.70; where D2s is the outer diameter of the object side surface of the second spacer, and T23 is the air gap between the second lens and the third lens on the optical axis.

[0063] In this way, by controlling the relevant dimensions of the second lens, the third lens, and the second spacer element to satisfy the above relationship, it helps to compensate for changes in lens field curvature, block extra stray light, and improve image quality.

[0064] According to some embodiments of this application, the plurality of spacers further includes a fourth spacer disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: 1.80 < T34 / CP4 < 2.70; where T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacer along the optical axis.

[0065] By controlling the dimensions of the third lens, fourth lens, and fourth spacer element to satisfy the above-mentioned relationship, stray light problems in the optical imaging lens can be effectively suppressed, while compensating for lens field curvature changes, thereby improving optical imaging quality. It can also avoid assembly deviations or stress concentrations caused by excessively thick or thin spacers, improving mechanical strength and lens assembly stability.

[0066] According to some embodiments of this application, the plurality of spacers further includes a third spacer disposed on the image side of the third lens and in contact with the image side of the third lens, and a fourth spacer disposed on the image side of the fourth lens and in contact with the image side of the fourth lens, wherein the optical imaging lens satisfies: 24.24≤f4 / EP34≤41.14; where f4 is the effective focal length of the fourth lens, and EP34 is the distance along the optical axis from the image side of the third spacer to the object side of the fourth spacer.

[0067] In this way, by controlling the relevant dimensions of the fourth lens, the third spacer element, and the fourth spacer element to satisfy the above relationship, the focal length range of the fourth lens can be effectively controlled, the propagation path of light can be adjusted, the reflection and scattering of non-imaging light between the spacer elements can be reduced, ghosting and glare phenomena can be reduced, and the image quality can be improved. At the same time, this ratio range ensures that the optical components have reasonable tolerance limits during mechanical assembly, avoids optical axis offset caused by temperature changes or vibration, and maintains a compact mechanical structure.

[0068] According to some embodiments of this application, the plurality of spacers further includes a fourth spacer disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: -3.90 < R8 / d4s < -2.35; 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 surface of the fourth spacer.

[0069] In this way, by controlling the relevant dimensions of the fourth lens and the fourth spacer element to satisfy the above relationship, the deflection direction of light rays exiting the fourth lens image side can be effectively controlled. At the same time, the fourth spacer element intercepts excess light rays in the outer field of view, effectively reducing stray light from the lens and improving the image quality of the lens.

[0070] According to some embodiments of this application, the plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 2.09≤d5s / R11<3.80; where d5s is the inner diameter of the object side surface of the fifth spacer element and R11 is the radius of curvature of the object side surface of the sixth lens.

[0071] In this way, by controlling the relevant dimensions of the sixth lens and the fifth spacer element to satisfy the above relationship, the propagation path of light can be adjusted, effectively correcting aberrations such as spherical aberration and coma. Furthermore, the fifth spacer element can block excess light, improve stray light in the lens, and enhance the image quality of the lens.

[0072] According to some embodiments of this application, the plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 1.80≤(EP56+CP6) / CT6<2.40; wherein EP56 is the distance along the optical axis from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element, CP6 is the maximum thickness of the sixth spacer element along the optical axis, and CT6 is the center thickness of the sixth lens.

[0073] In this way, by controlling the dimensions of the sixth lens, the fifth spacer element, and the sixth spacer element to satisfy the above relationship, the influence of ray path length and lens thickness on aberrations can be balanced. If this ratio is too small, it may lead to insufficient spherical aberration correction; if it is too large, it may affect field curvature. At the same time, it ensures that sufficient tolerance compensation space is reserved during lens assembly, avoiding structural loosening due to excessive spacing, and ensuring the assembly stability of the imaging lens group.

[0074] According to some embodiments of this application, the plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side of the fifth lens, wherein the optical imaging lens satisfies: -1.40 < SAG61 / EP56 ≤ -0.88; wherein SAG61 is the displacement along the optical axis from the intersection of the object side of the sixth lens and the optical axis to the vertex of the optical effective radius of the object side of the sixth lens, and EP56 is the distance along the optical axis from the image side of the fifth spacer element to the object side of the sixth spacer element.

[0075] In this way, by controlling the relevant dimensions of the sixth lens, the fifth spacer element, and the sixth spacer element to satisfy the above relationship, since the sixth lens has a direct influence on the deflection angle of the principal ray, strictly controlling the curvature of the object side (concave surface) of the sixth lens helps to optimize aberration correction; at the same time, this conditional formula effectively controls the edge thickness of the sixth lens, ensuring the uniformity of the sixth lens thickness, which helps to form the lens and improve the lens forming yield.

[0076] According to some embodiments of this application, the optical imaging lens satisfies: 1.93≤(D6m-D6s) / CP6<3.10; where D6m is the outer diameter of the image side of the sixth spacer element, D6s is the outer diameter of the object side of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element along the optical axis.

[0077] In this way, by controlling the relevant dimensions of the sixth spacer element to satisfy the above relationship, it is possible to ensure that the assembly step difference between the spacer element and the adjacent lens is appropriate and the taper of the contact surface is moderate. If the ratio is too small, it will lead to insufficient assembly positioning accuracy; if the ratio is too large, it may cause stress concentration.

[0078] According to some embodiments of this application, the plurality of spacers further includes a sixth auxiliary spacer element disposed on the image side of the sixth spacer element and in contact with the image side of the sixth spacer element, wherein the optical imaging lens satisfies: -3.30 < EP67 / (D7s-D6bm) ≤ -2.69; where EP67 is the distance along the optical axis from the image side of the sixth spacer element to the object side of the seventh spacer element, D7s is the outer diameter of the object side of the seventh spacer element, and D6bm is the outer diameter of the image side of the auxiliary element of the sixth spacer element.

[0079] Thus, by controlling the dimensions of the sixth spacer element, the sixth auxiliary spacer element, and the seventh spacer element to satisfy the above relationship, and by limiting the range of the ratio of the outer diameter difference between the two adjacent spacer elements of EP67 and the seventh lens, field curvature and distortion can be effectively balanced. Negative upper and lower limits indicate that the spacer elements employ a tapered outer diameter design, avoiding optical axis shift caused by abrupt diameter changes and improving assembly stability.

[0080] According to some embodiments of this application, the optical imaging lens satisfies: 2.80 < d0m / DT0s ≤ 3.36; where d0m is the inner diameter of the image side of the lens barrel, and DT0s is the light-transmitting aperture of the object side of the lens barrel.

[0081] In this way, by controlling the ratio of the inner diameter of the image side of the lens barrel to the light-transmitting aperture, the installation space for the large-diameter lens at the rear end is ensured so that optical performance is not sacrificed due to the size limitations of the lens barrel's mechanical structure. At the same time, the reflection of edge light by the inner wall of the lens barrel can be reduced, ghosting energy can be lowered, and image quality can be improved.

[0082] According to some embodiments of this application, the optical imaging lens satisfies: 1.35 < TD / (D0m - D0s) ≤ 1.86; where TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, D0m is the outer diameter of the image side of the lens barrel, and D0s is the outer diameter of the object side of the lens barrel.

[0083] In this way, by controlling the ratio of TD / (D0m-D0s) within this range, it is helpful to control the length and axial dimension of the lens barrel, thereby compressing the length and outer diameter of the lens, reducing the volume of the lens, and helping to achieve miniaturization of the module.

[0084] According to some embodiments of this application, the optical imaging lens satisfies: 7.22mm≤d0m / ImgH×EPD≤8.00mm; where d0m is the inner diameter of the image side of the lens barrel, ImgH is half the diagonal length of the effective pixel area of ​​the imaging surface of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0085] In this way, by controlling the product of the ratio of the inner diameter of the image side of the lens barrel to half the length of the half-diagonal of the imaging plane (d0m / ImgH) and the entrance pupil diameter (EPD) within a reasonable range using the above relationship, it helps to fill the entire image plane with light, reduce vignetting and stray light reflected from the rear of the lens barrel, and improve the image quality of the lens. At the same time, it avoids an excessively large radial dimension of the lens barrel, which contributes to the miniaturization of optical imaging lenses.

[0086] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, as needed, the optical imaging lens may also include other numbers of spacers than those described in the above embodiments.

[0087] Some specific, non-limiting embodiments of the above-described implementations of this application are described in more detail below with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ (not shown in the figure) represents the object plane of the optical imaging lens, STO (not shown in the figure) represents the surface of the aperture, S1 represents the object-side plane of the first lens E1, S2 represents the image-side plane of the first lens E1, S3 represents the object-side plane of the second lens E2, S4 represents the image-side plane of the second lens E2, S5 represents the object-side plane of the third lens E3, S6 represents the image-side plane of the third lens E3, S7 represents the object-side plane of the fourth lens E4, S8 represents the image-side plane of the fourth lens E4, S9 represents the object-side plane of the fifth lens E5, S10 represents the image-side plane of the fifth lens E5, S11 represents the object-side plane of the sixth lens E6, S12 represents the image-side plane of the sixth lens E6, S13 represents the object-side plane of the seventh lens E7, S14 represents the image-side plane of the seventh lens E7, S15 represents the object-side plane of the filter, S16 represents the image-side plane of the filter, and S17 represents the imaging plane (S15, S16, S17 are as follows). Figure 2 As shown in the attached figures, the rest are omitted.

[0088] Example 1

[0089] like Figure 2 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0090] The plurality of spacers further includes a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0091] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0092] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 and image-side surface S2 are convex and concave, respectively; the second lens E2 has negative optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has negative optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has positive optical power, and its object-side surface S7 and image-side surface S8 are both convex; the fifth lens E5 has negative optical power, and its object-side surface S9 and image-side surface S10 are convex and concave, respectively; the sixth lens E6 has positive optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0093] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, where the units of radius of curvature and thickness / distance are millimeters (mm).

[0094] Table 1: Basic Optical Parameters of the Optical Imaging Lens in Example 1

[0095]

[0096] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape of each aspherical lens is... The following aspherical formulas can be used for limitation:

[0097] ;

[0098] in, Let be the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for the aspherical mirrors S1 to S14 in Example 1.

[0099] Table 2: Aspherical Higher-Order Coefficients of the Optical Imaging Lens in Example 1

[0100]

[0101] Example 2

[0102] like Figure 3 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0103] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0104] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0105] It is worth noting that, compared with Embodiment 1 above, the optical imaging lens of Embodiment 2 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 2 is the same as Table 1, and the aspherical higher-order term coefficient table is the same as Table 2. However, the optical imaging lens of Embodiment 2 has different structural parameters than the optical imaging lens of Embodiment 1 above. That is, the difference between Embodiment 2 and Embodiment 1 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 2 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0106] Example 3

[0107] like Figure 4 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0108] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0109] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0110] It is worth noting that, compared with Embodiment 1 above, the optical imaging lens of Embodiment 3 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 3 is the same as Table 1, and the aspherical higher-order term coefficient table is the same as Table 2. However, the optical imaging lens of Embodiment 3 has different structural parameters than the optical imaging lens of Embodiment 1 above. That is, the difference between Embodiment 3 and Embodiment 1 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 3 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0111] Simulation tests showed that the on-axis chromatic aberration curves of the optical imaging lenses in Examples 1, 2, and 3 are as follows: Figure 5 As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Embodiments 1, 2, and 3 are shown below. Figure 6 As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in Embodiments 1, 2, and 3 are as follows. Figure 7 As shown, it represents the degree of distortion in the actual image. According to... Figure 5 Figure 6 and Figure 7It can be seen that the optical imaging lenses in Embodiment 1, Embodiment 2 and Embodiment 3 can all achieve good imaging quality.

[0112] Example 4

[0113] like Figure 8 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0114] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0115] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0116] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 and image-side surface S2 are convex and concave, respectively; the second lens E2 has negative optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has negative optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has positive optical power, and its object-side surface S7 and image-side surface S8 are both convex; the fifth lens E5 has negative optical power, and its object-side surface S9 and image-side surface S10 are convex and concave, respectively; the sixth lens E6 has positive optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0117] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0118] Table 3: Basic optical parameters of the optical imaging lens in Example 4

[0119]

[0120] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1 to S14 in Embodiment 4.

[0121] Table 4: Aspherical Higher-Order Coefficients of the Optical Imaging Lens in Example 4

[0122]

[0123] Example 5

[0124] like Figure 9 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0125] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0126] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0127] It is worth noting that, compared with Embodiment 4 above, the optical imaging lens of Embodiment 5 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 5 is the same as Table 3, and the aspherical higher-order term coefficient table is the same as Table 4. However, the optical imaging lens of Embodiment 5 has different structural parameters than the optical imaging lens of Embodiment 4 above. That is, the difference between Embodiment 5 and Embodiment 4 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 5 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0128] Example 6

[0129] like Figure 10 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0130] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0131] It is worth noting that, compared with Embodiment 4 above, the optical imaging lens of Embodiment 6 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 6 is the same as Table 3, and the aspherical higher-order term coefficient table is the same as Table 4. However, the optical imaging lens of Embodiment 6 has different structural parameters than the optical imaging lens of Embodiment 4 above. That is, the difference between Embodiment 6 and Embodiment 4 above lies in the different dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens. Specifically, the values ​​of each relevant structural parameter in Embodiment 6 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0132] Simulation tests showed that the on-axis chromatic aberration curves of the optical imaging lenses in Examples 4, 5, and 6 are as follows: Figure 11 As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Examples 4, 5, and 6 are shown below. Figure 12 As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in Examples 4, 5, and 6 are as follows. Figure 13 As shown, it represents the degree of distortion in the actual image. According to... Figure 11 , Figure 12 and Figure 13 It can be seen that the optical imaging lenses in Embodiments 4, 5 and 6 can all achieve good imaging quality.

[0133] Example 7

[0134] like Figure 14 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0135] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0136] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0137] In this embodiment, the first lens E1 has positive optical power, and its object-side surface S1 and image-side surface S2 are convex and concave, respectively; the second lens E2 has negative optical power, and its object-side surface S3 and image-side surface S4 are convex and concave, respectively; the third lens E3 has negative optical power, and its object-side surface S5 and image-side surface S6 are convex and concave, respectively; the fourth lens E4 has positive optical power, and its object-side surface S7 and image-side surface S8 are both convex; the fifth lens E5 has negative optical power, and its object-side surface S9 and image-side surface S10 are convex and concave, respectively; the sixth lens E6 has positive optical power, and its object-side surface S11 and image-side surface S12 are convex and concave, respectively; the seventh lens E7 has negative optical power, and its object-side surface S13 and image-side surface S14 are convex and concave, respectively.

[0138] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0139] Table 5: Basic Optical Parameters of the Optical Imaging Lens in Example 7

[0140]

[0141] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape of each aspherical lens can be defined by the aspherical formula given in Embodiment 1 above. Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1 to S14 in Embodiment 7.

[0142] Table 6: Aspherical Higher-Order Coefficients of the Optical Imaging Lens in Example 7

[0143]

[0144] Example 8

[0145] like Figure 15 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0146] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0147] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0148] It is worth noting that, compared with Embodiment 7 above, the optical imaging lens of Embodiment 8 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 8 is the same as Table 5, and the aspherical higher-order term coefficient table is the same as Table 6. However, the optical imaging lens of Embodiment 8 has different structural parameters than the optical imaging lens of Embodiment 7 above. That is, the difference between Embodiment 8 and Embodiment 7 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 8 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0149] Example 9

[0150] like Figure 16 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a plurality of spacer elements housed within the lens barrel P0; the lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 arranged sequentially along the optical axis from the object side to the image side.

[0151] The plurality of spacers include a first spacer P1 placed on the image side of the first lens E1 and in contact with the image side surface S2 of the first lens E1; a second spacer P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; a third spacer P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; a fourth spacer P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; a fifth spacer P5 placed on the image side of the fifth lens E5 and in contact with the image side surface S10 of the fifth lens E5; a sixth spacer P6 placed on the image side of the sixth lens E6 and in contact with the image side surface S12 of the sixth lens E6; a sixth auxiliary spacer P6b placed on the image side of the sixth spacer P6 and in contact with the image side surface of the sixth spacer P6; and a seventh spacer P7 placed on the image side of the seventh lens E7 and in contact with the image side surface S14 of the seventh lens E7.

[0152] In this embodiment, the aperture STO of the optical imaging lens is located on the object side of the first lens E1 along the optical axis.

[0153] It is worth noting that, compared with Embodiment 7 above, the optical imaging lens of Embodiment 9 has the same optical parameters, that is, the basic optical parameter table of the optical imaging lens of Embodiment 9 is the same as Table 5, and the aspherical higher-order term coefficient table is the same as Table 6. However, the optical imaging lens of Embodiment 9 has different structural parameters than the optical imaging lens of Embodiment 7 above. That is, the difference between Embodiment 9 and Embodiment 7 is that the dimensional values ​​of some structural parameters of the lens barrel and multiple spacer elements in the optical imaging lens are different. Specifically, the values ​​of each relevant structural parameter in Embodiment 9 are shown in Table 8 below. It can be understood that the unit of each structural parameter value shown in Table 8 is millimeters (mm), and the schematic diagram of each structural parameter in the structural diagram of the optical imaging lens is shown below. Figure 1 As shown.

[0154] Simulation tests showed that the on-axis chromatic aberration curves of the optical imaging lenses in Examples 7, 8, and 9 were as follows: Figure 17 As shown, this represents the degree of deviation of the focal point after light of different wavelengths passes through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Examples 7, 8, and 9 are shown below. Figure 18 As shown, it represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curves of the optical imaging lenses in Embodiments 7, 8, and 9 are as follows. Figure 19 As shown, it represents the degree of distortion in the actual image. According to... Figure 17 , Figure 18 and Figure 19 It can be seen that the optical imaging lenses in Embodiments 7, 8 and 9 can all achieve good imaging quality.

[0155] In summary, the optical parameters of the optical imaging lens in Examples 1 to 9 are shown in Table 7 below.

[0156] Table 7: Optical Parameters of Optical Imaging Lenses

[0157]

[0158] Furthermore, the structural parameters of the optical imaging lenses in Examples 1 to 9 are shown in Table 8. All structural parameters in the table below are in millimeters (mm).

[0159] Table 8: Structural Parameters of Optical Imaging Lenses

[0160]

[0161] In summary, the optical imaging lenses in Examples 1 to 9 satisfy the relationships shown in Table 9, as detailed in Table 9.

[0162] Table 9: Relationships Satisfied by Optical Imaging Lenses

[0163]

[0164] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0165] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that: The system includes a lens barrel and a lens group and multiple spacer elements housed within the lens barrel. The lens group comprises, arranged sequentially along the optical axis from the object side to the image side, a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. The object side and image side of the first lens are convex and concave, respectively; the object side and image side of the second lens are convex and concave, respectively; the object side and image side of the third lens are convex and concave, respectively; the object side and image side of the fourth lens are both convex; the object side and image side of the fifth lens are convex and concave, respectively; the object side and image side of the sixth lens are convex and concave, respectively; and the object side and image side of the seventh lens are convex and concave, respectively. The optical imaging lens includes at least one spacer element between any two adjacent lenses, and the plurality of spacer elements includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side surface of the sixth lens, and a seventh spacer element disposed on the image side of the seventh lens and in contact with the image side surface of the seventh lens; the optical imaging lens satisfies: 3.15 < R13 / T67 ≤ 7.22; 1.60 < CP7 / (d7m - d7s) ≤ 2.71; and 1.30 < d6s / f6 < 1.90; Wherein, R13 is the radius of curvature of the object-side surface of the seventh lens, T67 is the air gap between the sixth and seventh lenses on the optical axis, CP7 is the maximum thickness of the seventh spacer element along the optical axis, d7m is the inner diameter of the image-side surface of the seventh spacer element, d7s is the inner diameter of the object-side surface of the seventh spacer element, d6s is the inner diameter of the object-side surface of the sixth spacer element, and f6 is the effective focal length of the sixth lens.

2. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, wherein the optical imaging lens satisfies: 2.20 < R1 / EP01 < 2.70; Wherein, R1 is the radius of curvature of the object side surface of the first lens, and EP01 is the distance along the optical axis from the object side surface of the lens barrel to the object side surface of the first spacer element.

3. The optical imaging lens according to claim 1, characterized in that, The plurality of spacer elements further includes a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 13.99≤(CT1+CT2) / T12≤15.00; and -8.45≤f² / d²s≤-6.70; Wherein, CT1 is the center thickness of the first lens, CT2 is the center thickness of the second lens, T12 is the air gap between the first lens and the second lens on the optical axis, f2 is the effective focal length of the second lens, and d2s is the inner diameter of the object side of the second spacer element.

4. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a first spacer element disposed on the image side of the first lens and in contact with the image side surface of the first lens, 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. The optical imaging lens satisfies the following: 0.85≤EP23 / EP12<1.45; Wherein, EP23 is the distance along the optical axis from the image side of the second spacer to the object side of the third spacer, and EP12 is the distance along the optical axis from the image side of the first spacer to the object side of the second spacer.

5. The optical imaging lens according to claim 1, characterized in that, The plurality of spacer elements further includes a second spacer element disposed on the image side of the second lens and in contact with the image side surface of the second lens, wherein the optical imaging lens satisfies: 7.88≤D2s / T23<9.70; Wherein, D2s is the outer diameter of the object side of the second spacer element, and T23 is the air gap between the second lens and the third lens on the optical axis.

6. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: 1.80 < T34 / CP4 < 2.70; Wherein, T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis.

7. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, and a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: 24.24≤f4 / EP34≤41.14; Where f4 is the effective focal length of the fourth lens, and EP34 is the distance along the optical axis from the image side of the third spacer element to the object side of the fourth spacer element.

8. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, wherein the optical imaging lens satisfies: -3.90 < R8 / d4s < -2.35; Wherein, R8 is the radius of curvature of the image side of the fourth lens, and d4s is the inner diameter of the object side of the fourth spacer element.

9. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 2.09 ≤ d5s / R11 < 3.80; Wherein, d5s is the inner diameter of the object side surface of the fifth spacer element, and R11 is the radius of curvature of the object side surface of the sixth lens.

10. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: 1.80≤(EP56+CP6) / CT6<2.40; Wherein, EP56 is the distance along the optical axis from the image side of the fifth spacer to the object side of the sixth spacer, CP6 is the maximum thickness of the sixth spacer along the optical axis, and CT6 is the center thickness of the sixth lens.

11. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens, wherein the optical imaging lens satisfies: -1.40 < SAG61 / EP56 ≤ -0.88; Wherein, SAG61 is the displacement along the optical axis from the intersection of the object side surface and the optical axis of the sixth lens to the vertex of the optical effective radius of the object side surface of the sixth lens, and EP56 is the distance along the optical axis from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element.

12. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.93≤(D6m-D6s) / CP6<3.10; Wherein, D6m is the outer diameter of the image side of the sixth spacer element, D6s is the outer diameter of the object side of the sixth spacer element, and CP6 is the maximum thickness of the sixth spacer element along the optical axis.

13. The optical imaging lens according to claim 1, characterized in that, The plurality of spacers further includes a sixth auxiliary spacer element disposed on the image side of the sixth spacer element and in contact with the image side surface of the sixth spacer element, wherein the optical imaging lens satisfies: -3.30<EP67 / (D7s-D6bm)≤-2.69; Wherein, EP67 is the distance along the optical axis from the image side of the sixth spacer to the object side of the seventh spacer, D7s is the outer diameter of the object side of the seventh spacer, and D6bm is the outer diameter of the image side of the sixth auxiliary spacer.

14. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 2.80 < d0m / DT0s ≤ 3.36; Wherein, d0m is the inner diameter of the image side of the lens barrel, and DT0s is the light-transmitting aperture of the object side of the lens barrel.

15. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.35 < TD / (D0m - D0s) ≤ 1.86; Wherein, TD is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, D0m is the outer diameter of the image side of the lens barrel, and D0s is the outer diameter of the object side of the lens barrel.

16. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 7.22mm≤d0m / ImgH×EPD≤8.00mm; Wherein, d0m is the inner diameter of the image side of the lens barrel, ImgH is half the diagonal length of the effective pixel area of ​​the imaging surface of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

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