Optical imaging lens

Abstract

The invention discloses an optical imaging lens which comprises a lens barrel, a lens group and a bearing element group, the lens group and the bearing element group are contained in the lens barrel, and the lens group is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from the object side to the image side along the optical axis and have focal power; the bearing element group comprises a first bearing element; the first bearing element is arranged between the first lens and the second lens and is in contact with the image side surface of the first lens; the optical imaging lens satisfies the following conditions: 2.55 lt; d0 m / EPDlt; 2.75, 1.50 lt, 2.75, 1.50 lt; d0s / d1slt; 1.95, 1.45 lt, 1.95, 1.45 lt; d < 0 > m / D < 0 < slt >; 1.80 and 0.90 lt, 1.80 and 0.90 lt; eP01 / CT1lt, EP01 / CT1lt; and 1.15.

Description

Technical Field

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

[0002] In recent years, with the ever-changing consumer demands, the requirements for optical imaging lenses have gradually become more complex and diverse. In different application scenarios, the performance of optical imaging lenses varies.

[0003] In a seven-piece optical imaging lens, on the premise of ensuring a large aperture for the optical imaging lens, after light enters the optical imaging lens, the thickness, aperture, etc. of the lens will affect the progress of light and the contribution of light at a specific angle, and uneven thickness will cause aberration, affecting the clarity and resolution of the optical imaging lens, and thus affecting the imaging quality of the optical imaging lens. Summary of the Invention

[0004] This application provides an optical imaging lens, which includes a lens barrel and a lens group and a support element group accommodated in the lens barrel. The lens group is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical power arranged in sequence from the object side to the image side along the optical axis; the support element group includes a first support element, and the first support element is placed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 2.55 < d0m / EPD < 2.75, 1.50 < d0s / d1s < 1.95, 1.45 < D0m / D0s < 1.80, and 0.90 < EP01 / CT1 < 1.15, where d0s is the inner diameter of the object side end face of the lens barrel, d0m is the inner diameter of the image side end face of the lens barrel, D0s is the outer diameter of the object side end face of the lens barrel, D0m is the outer diameter of the image side end face of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, EP01 is the distance between the object side end face of the lens barrel and the object side surface of the first support element along the optical axis, CT1 is the central thickness of the first lens on the optical axis, and d1s is the inner diameter of the object side surface of the first support element.

[0005] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 2.80 < d0s / DT11 < 3.65, where DT11 is the effective semi-aperture of the object side surface of the first lens.

[0006] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 3.35 < d1s / CT1 ≤ 4.10.

[0007] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.40mm -1 <f1 / CT1 / d1s < 1.80mm - 1 , where f1 is the effective focal length of the first lens.

[0008] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 3.25 < D0s / DT11 < 3.90 and 2.35 < d0m / DT72 ≤ 2.50, where DT11 is the effective semi-aperture of the object side surface of the first lens, and DT72 is the effective semi-aperture of the image side surface of the seventh lens.

[0009] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 4.80 < L / (CT1 + T12) < 6.50, where L is the maximum length of the lens barrel along the optical axis direction, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0010] According to an exemplary embodiment of the present application, the bearing element group further includes a second bearing element, the second bearing element is disposed between the second lens and the third lens and contacts the image side surface of the second lens; and the optical imaging lens satisfies: 1.70 < EP12 / T12 < 4.60, where EP12 is the distance along the optical axis from the image side surface of the first bearing element to the object side surface of the second bearing element, and T12 is the air gap between the first lens and the second lens on the optical axis.

[0011] According to an exemplary embodiment of the present application, the bearing element group further includes a second bearing element, the second bearing element is disposed between the second lens and the third lens and contacts the image side surface of the second lens; and the optical imaging lens satisfies: 15.60 < T23 / CP2 ≤ 39.00, where T23 is the air gap between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second bearing element.

[0012] According to an exemplary embodiment of the present application, the bearing element group further includes a fourth bearing element, a fifth bearing element, and a sixth bearing element. The fourth bearing element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The fifth bearing element is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens. The sixth bearing element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens; and the optical imaging lens satisfies: 1.40 < (EP45 + EP56) / (CT5 + T56) < 2.20, where EP45 is the distance along the optical axis from the image side surface of the fourth bearing element to the object side surface of the fifth bearing element, EP56 is the distance along the optical axis from the image side surface of the fifth bearing element to the object side surface of the sixth bearing element, CT5 is the central thickness of the fifth lens on the optical axis, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis.

[0013] According to an exemplary embodiment of the present application, the support element group further includes a sixth support element and a seventh support element. The sixth support element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens, and the seventh support element is disposed on the image side of the seventh lens and contacts the image side surface of the seventh lens; and the optical imaging lens satisfies: 1.15 < d7s / d6m < 1.40, where d6m is the inner diameter of the image side surface of the sixth support element, and d7s is the inner diameter of the object side surface of the seventh support element.

[0014] According to an exemplary embodiment of the present application, the support element group further includes a sixth support element and a seventh support element. The sixth support element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens, and the seventh support element is disposed on the image side of the seventh lens and contacts the image side surface of the seventh lens; and the optical imaging lens satisfies: 1.00 ≤ SG72 / EP67 < 1.90, where SG72 is the distance along the optical axis from the intersection point of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element, and EP67 is the distance along the optical axis from the image side surface of the sixth support element to the object side surface of the seventh support element.

[0015] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.70 < SG72 / SG71 < 1.00, where SG71 is the distance along the optical axis from the intersection point of the object side surface of the seventh lens and the optical axis to the image side surface of the sixth support element, and SG72 is the distance along the optical axis from the intersection point of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element.

[0016] According to an exemplary embodiment of the present application, the support element group further includes a sixth support element. The sixth support element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens; and the optical imaging lens satisfies: -20.60 ≤ (SG72 - SG71) / CP6 < -2.05, where SG71 is the distance along the optical axis from the intersection point of the object side surface of the seventh lens and the optical axis to the image side surface of the sixth support element, SG72 is the distance along the optical axis from the intersection point of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element, and CP6 is the maximum thickness of the sixth support element.

[0017] According to an exemplary embodiment of the present application, the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is convex, and the image side surface is concave; the object side surface of the fourth lens is convex; the object side surface of the sixth lens is convex, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave.

[0018] The optical imaging lens provided by this application is a large-aperture lens. The inner diameter of the image-side end face of the lens barrel and the entrance pupil diameter of the optical imaging lens satisfy 2.55 < d0m / EPD < 2.75. At the same time, the inner diameter of the object-side end face of the lens barrel and the inner diameter of the object-side face of the first supporting element satisfy 1.50 < d0s / d1s < 1.95. The first supporting element, as the supporting element closest to the object side, restricts the light entering the lens, thereby affecting the light passing through the lens. The first lens, as the lens closest to the object side, has a large light passing amount, and the surface shape of the first lens is more sensitive compared to other lenses. By controlling the ratios of EP01 / CT1 and D0m / D0s, the aperture of the first lens and the ratio of the center thickness to the edge thickness can be controlled, making the light refraction at the first lens relatively gentle, reducing the overall sensitivity of the lens, effectively balancing the stress distribution inside the first lens, and reducing aberrations caused by uneven thickness, such as spherical aberration and coma, significantly improving the clarity and resolution of imaging; at the same time, controlling the ratio of the outer diameter of the object-side end face to the outer diameter of the image-side end face of the lens barrel can enhance or weaken the contribution of light at specific angles, thereby optimizing the imaging contrast, reducing the interference of stray light, and possibly achieving a more compact lens structure. Brief Description of the Drawings

[0019] Other features, objectives, and advantages of this application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings. Among them:

[0020] Figure 1 Shows the structural layout diagram of an optical imaging lens of this application;

[0021] Figure 2 Shows the structural layout diagram of an optical imaging lens of this application;

[0022] Figure 3 Shows the structural schematic diagram of the optical imaging lens of Embodiment 1 of this application;

[0023] Figure 4 Shows the structural schematic diagram of the optical imaging lens of Embodiment 2 of this application;

[0024] Figure 5 Shows the astigmatism curve (A1), distortion curve (B1), and longitudinal chromatic aberration curve (C1) of the optical imaging lenses of Embodiment 1 and Embodiment 2 of this application;

[0025] Figure 6 Shows the structural schematic diagram of the optical imaging lens of Embodiment 3 of this application;

[0026] Figure 7 Shows the structural schematic diagram of the optical imaging lens of Embodiment 4 of this application;

[0027] Figure 8The astigmatism curve (A2), the distortion curve (B2) and the magnification chromatic aberration curve (C2) of the optical imaging lenses of Examples 3 and 4 of the present application are shown;

[0028] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0029] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0030] Fig.11 The astigmatism curve (A3), the distortion curve (B3) and the magnification chromatic aberration curve (C3) of the optical imaging lenses of Examples 5 and 6 of the present application are shown;

[0031] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0032] Fig.13 A schematic diagram showing the structure of the optical imaging lens of Example 8 of the present application is shown

[0033] Fig.14 The astigmatism curve (A4), the distortion curve (B4) and the magnification chromatic aberration curve (C4) of the optical imaging lenses of Examples 7 and 8 of the present application are shown;

[0034] Fig.15 The aberration curves of the optical imaging lens of the present application are shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.75 and EP01 / CT1=0.95 are satisfied;

[0035] Fig.16 The modulation transfer function curve of the optical imaging lens of the present application is shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.75 and EP01 / CT1=0.95 are satisfied;

[0036] Fig.17 The aberration curves of the optical imaging lens of the present application are shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.85 and EP01 / CT1=1.2 are satisfied;

[0037] Fig.18 The modulation transfer function curve of the optical imaging lens of the present application is shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.85 and EP01 / CT1=1.2 is satisfied;

[0038] Fig.19The aberration curves of the optical imaging lens of the present application are shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.39 and EP01 / CT1=0.89 are satisfied;

[0039] Fig. 20 The modulation transfer function curve of the optical imaging lens of the present application is shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.39 and EP01 / CT1=0.89 are satisfied. DETAILED DESCRIPTION

[0040] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0041] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] In the 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 shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0043] In this article, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The paraxial region refers to the region near the optical axis. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0044] It should also be understood that the terms "including" and / or "having", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when describing the embodiments of the present application, the term "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.

[0045] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0046] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can also be made, which all belong to the protection scope of the present application. For example, the lens group, lens barrel and supporting element group in each embodiment of the present application can be combined arbitrarily, and are not limited to the lens group in one embodiment can only be combined with the lens barrel, supporting element group, etc. of the embodiment.

[0047] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Figure 1 and Figure 2 The structural arrangement diagram of an optical imaging lens of the present application and a schematic diagram of some parameters are shown exemplarily to facilitate a better understanding of the present application. Figure 1 As shown, d0s is the inner diameter of the object side end face of the lens barrel, d0m is the inner diameter of the image side end face of the lens barrel, D0s is the outer diameter of the object side end face of the lens barrel, D0m is the outer diameter of the image side end face of the lens barrel, d1s is the inner diameter of the object side face of the first supporting element, d6m is the inner diameter of the image side face of the sixth supporting element, d7s is the inner diameter of the object side face of the seventh supporting element, EP01 is the distance between the object side end face of the lens barrel and the object side face of the first supporting element along the optical axis, EP12 is the distance between the object side end face of the lens barrel and the object side face of the first supporting element EP45 is the distance from the image side surface of the fourth supporting element to the object side surface of the fifth supporting element along the optical axis, EP56 is the distance from the image side surface of the fifth supporting element to the object side surface of the sixth supporting element along the optical axis, EP67 is the distance from the image side surface of the sixth supporting element to the object side surface of the seventh supporting element along the optical axis, CP2 is the maximum thickness of the second supporting element, and CP6 is the maximum thickness of the sixth supporting element; Figure 2 As shown, DT11 is the effective semi-aperture of the object side of the first lens, SG71 is the distance from the intersection of the object side of the seventh lens and the optical axis to the image side of the sixth supporting element along the optical axis, and SG72 is the distance from the intersection of the image side of the seventh lens and the optical axis to the object side of the seventh supporting element along the optical axis.

[0049] refer to Figure 3 , Figure 4 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.12 and Fig.13 In a first aspect of the present application, there is provided an optical imaging lens, which includes a seven-piece lens group, and the seven-piece lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens with optical focal lengths arranged in sequence from the object side to the image side along the optical axis. Each lens has at least an object side surface facing the object side and an image side surface facing the imaging surface side. Each lens has an effective diameter area that can pass light and a non-effective diameter area surrounding the effective diameter area that cannot pass light. Among the first lens to the seventh lens, there may be an air gap between any two adjacent lenses on the optical axis.

[0050] In an exemplary embodiment, the first lens has positive optical power. The second lens has negative optical power. The third lens has positive optical power or negative optical power. The fourth lens has positive optical power or negative optical power. The fifth lens has positive optical power or negative optical power. The sixth lens has positive optical power or negative optical power. The seventh lens has negative optical power.

[0051] In an exemplary embodiment, the object side surface of the first lens is convex, and the image side surface is concave. The object side surface of the second lens is convex, and the image side surface is concave. The object side surface of the third lens is convex, and the image side surface is concave. The object side surface of the fourth lens is convex, and the image side surface is convex or concave. The object side surface of the fifth lens is concave, and the image side surface is convex or concave; or the object side surface of the fifth lens is convex, and the image side surface is concave. The object side surface of the sixth lens is convex, and the image side surface is concave. The object side surface of the seventh lens is convex, and the image side surface is concave.

[0052] In an exemplary embodiment, the optical imaging lens further includes a lens barrel. The lens group and the supporting element group are placed in the lens barrel. The lens barrel includes an object side end face, an image side end face, an outer annular surface, and an inner annular surface, wherein the end face of the lens barrel closest to the object side is the object side end face of the lens barrel, and the end face of the lens barrel closest to the image side is the image side end face of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel farthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface.

[0053] In an exemplary embodiment, the optical imaging lens may further include an aperture for limiting the light beam, which is conducive to converging the light entering the optical lens, reducing the maximum aperture of the optical lens, and reducing the assembly sensitivity of the system to further improve the imaging quality of the optical lens. It should be noted that the aperture can be set between or on one side of any lens according to actual needs. Exemplarily, the aperture can be set on the object side of the first lens.

[0054] In an exemplary embodiment, the optical imaging lens further includes a supporting element group, which may include at least one supporting element, and the supporting element is an annular through-hole element, and the middle through-hole allows light to pass through. The supporting element is arranged between the lenses and is located in the non-effective diameter area of ​​the lens. It should be understood that the present application does not specifically limit the number of supporting elements, and at least one supporting element is arranged between any two adjacent lenses, and the entire optical imaging lens may also include any number of supporting elements. The supporting element helps the optical imaging lens to intercept excess refractive and reflective light paths, reduce the generation of stray light and ghosting, and improve imaging quality. The shapes of the supporting elements may be the same or different, as long as they can play the corresponding role.

[0055] In an exemplary embodiment, the supporting element group includes a first supporting element, a second supporting element, a third supporting element, a fourth supporting element, a fifth supporting element, a sixth supporting element and a seventh supporting element. The first supporting element is placed between the first lens and the second lens and is in at least partial contact with the image side surface of the first lens, and is in at least partial contact with the object side surface of the second lens. The second supporting element is placed between the second lens and the third lens and is in at least partial contact with the image side surface of the second lens, and is in at least partial contact with the object side surface of the third lens. The third supporting element is placed between the third lens and the fourth lens and is in at least partial contact with the image side surface of the third lens, and is in at least partial contact with the object side surface of the fourth lens. The fourth supporting element is placed between the fourth lens and the fifth lens and is in at least partial contact with the image side surface of the fourth lens, and is in at least partial contact with the object side surface of the fifth lens. The fifth supporting element is placed between the fifth lens and the sixth lens and is in at least partial contact with the image side surface of the fifth lens, and is in at least partial contact with the object side surface of the sixth lens. The sixth supporting element is placed between the sixth lens and the seventh lens and is in at least partial contact with the image side surface of the sixth lens, and is in at least partial contact with the object side surface of the seventh lens. The seventh supporting element is disposed on the image side of the seventh lens and at least partially contacts the image side surface of the seventh lens.

[0056] In an exemplary embodiment, the optical imaging lens satisfies: 2.55 < d0m / EPD < 2.75, 1.50 < d0s / d1s < 1.95, 1.45 < D0m / D0s < 1.80, and 0.9 < EP01 / CT1 < 1.15, where d0s is the inner diameter of the object-side end face of the lens barrel, d0m is the inner diameter of the image-side end face of the lens barrel, D0s is the outer diameter of the object-side end face of the lens barrel, D0m is the outer diameter of the image-side end face of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, EP01 is the distance between the object-side end face of the lens barrel and the object-side surface of the first supporting element along the optical axis, CT1 is the central thickness of the first lens on the optical axis, and d1s is the inner diameter of the object-side surface of the first supporting element.

[0057] The optical imaging lens of the present application is a large-aperture lens. The inner diameter of the image-side end face of the lens barrel and the entrance pupil diameter of the optical imaging lens satisfy 2.55 < d0m / EPD < 2.75. At the same time, the inner diameter of the object-side end face of the lens barrel and the inner diameter of the object-side surface of the first supporting element satisfy 1.50 < d0s / d1s < 1.95. The first supporting element, as the supporting element closest to the object side, restricts the light entering the lens, thereby affecting the light transmission amount entering the lens. The first lens, as the lens closest to the object side, has a large light transmission amount, and the surface shape of the first lens is more sensitive compared to other lenses. By controlling the ratios of EP01 / CT1 and D0m / D0s, the thickness ratio and aperture of the first lens can be controlled, making the light refraction at the first lens relatively gentle, reducing the overall sensitivity of the lens, effectively balancing the stress distribution inside the first lens, and reducing aberrations caused by uneven thickness, such as spherical aberration and coma, significantly improving the clarity and resolution of imaging. At the same time, controlling the ratio of the outer diameters of the object-side end face and the image-side end face of the lens barrel can enhance or weaken the contribution of light at a specific angle, thereby optimizing the imaging contrast, reducing the interference of stray light, and possibly achieving a more compact lens structure.

[0058] Fig.15 and Fig.16 respectively show the aberration curves and modulation transfer function curves of the optical imaging lens of the present application when d0m / EPD = 2.66, d0s / d1s = 1.55, D0m / D0s = 1.75, and EP01 / CT1 = 0.95;

[0059] Fig.17 and Fig.18 respectively show the aberration curves and modulation transfer function curves of the optical imaging lens of the present application when d0m / EPD = 2.66, d0s / d1s = 1.55, D0m / D0s = 1.85, and EP01 / CT1 = 1.2;

[0060] Fig.19 and Fig. 20The aberration curve and the modulation transfer function curve of the optical imaging lens of the present application are respectively shown when d0m / EPD=2.66, d0s / d1s=1.55, D0m / D0s=1.39 and EP01 / CT1=0.89 are satisfied.

[0061] Fig.15 and Fig.16 The optical imaging lens in satisfies the range defined by the conditional formulas d0m / EPD and d0s / d1s of this application. Under the premise of ensuring that the optical imaging lens has a large aperture, the contribution of light at a specific angle can be enhanced or weakened by adjusting the ratio of D0m / D0s, thereby optimizing the imaging contrast, reducing the interference of stray light, and possibly achieving a more compact lens structure; and by controlling the ratios of EP01 / CT1 and D0m / D0s, the aperture of the first lens and the ratio of the middle thickness to the edge thickness can be controlled, so that the light refraction at the first lens is relatively gentle, which can reduce the overall sensitivity of the lens, effectively balance the stress distribution inside the first lens, and reduce aberrations caused by uneven thickness, such as spherical aberration, coma, etc., significantly improving the clarity and resolution of the image, and thus improving the imaging quality of the optical imaging lens. Fig.15 It can be seen that the aberrations of each field of view of the optical imaging lens are good, with no obvious spherical aberration, coma and field curvature. Fig.16 It can be seen that the peak value of the modulation transfer function curve (MTF) is higher and the curve converges better.

[0062] Fig.17 and Fig.18 The optical imaging lens in satisfies the range defined by the conditional formulas d0m / EPD and d0s / d1s of the present application. Under the premise of ensuring that the optical imaging lens has a large aperture, the conditional formulas D0m / D0s and EP01 / CT1 both exceed the upper limit of the range defined by the present application, CT1 decreases, D0m increases, and the ratio of the middle thickness to the edge thickness of the first lens increases, resulting in obvious field curvature, defocus and aberration in the lens, and a significant decrease in peripheral resolution, which affects the imaging quality of the optical imaging lens.

[0063] Fig.19 and Fig. 20 The optical imaging lens in satisfies the range defined by the conditional formulas d0m / EPD and d0s / d1s of the present application. Under the premise of ensuring that the optical imaging lens has a large aperture, the conditional formulas D0m / D0s and EP01 / CT1 both exceed the lower limit of the range defined by the present application, which makes the aperture ratio between the object side and the image side of the optical imaging lens smaller, reduces the lens contrast, and increases CT1, resulting in obvious spherical aberration in the lens, and the central field of view of the MTF shows that the light cannot converge, and the resolution of the full field of view is seriously reduced, affecting the imaging quality of the optical imaging lens.

[0064] In an exemplary embodiment, the optical imaging lens satisfies: 2.80 < d0s / DT11 < 3.65, where d0s is the inner diameter of the object-side end face of the lens barrel, and DT11 is the effective semi-aperture of the object-side face of the first lens. The inner diameter of the object-side end face of the lens barrel can control the amount of light entering. By controlling the above conditions, the light entering the lens can meet the requirements of subsequent light after being refracted by the effective diameter of the first lens, satisfying the large aperture of the lens.

[0065] In an exemplary embodiment, the optical imaging lens satisfies: 3.35 < d1s / CT1 ≤ 4.10, where d1s is the inner diameter of the object-side face of the first bearing element, and CT1 is the central thickness of the first lens on the optical axis. By controlling the above conditions, it helps to ensure that the first lens can effectively collect and transmit light, while reducing aberration and distortion caused by improper lens thickness. At the same time, as a key element in the lens group, by controlling the ratio of d1s / CT1, it helps to optimize the arrangement and fixing method of subsequent elements inside the lens, improving the optical performance and mechanical structure stability of the lens.

[0066] In an exemplary embodiment, the optical imaging lens satisfies: 1.40 mm -1 <f1 / CT1 / d1s < 1.80 mm -1 , where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object-side face of the first bearing element, and CT1 is the central thickness of the first lens on the optical axis. By controlling the above conditions, it helps to ensure the effective role of the first lens in the lens system, can optimize the refraction and focusing effect of light, reduce aberration and distortion, thereby improving the clarity and resolution of imaging; and by controlling the proportional relationship among f1, CT1, and d1s, the overall size of the lens can be controlled to a certain extent, achieving a compact design of the lens while maintaining optical performance, which helps to meet the requirements of modern electronic devices for miniaturization and light weight.

[0067] In an exemplary embodiment, the optical imaging lens satisfies: 3.25 < D0s / DT11 < 3.90 and 2.35 < d0m / DT72 ≤ 2.50, where d0m is the inner diameter of the image-side end face of the lens barrel, D0s is the outer diameter of the object-side end face of the lens barrel, DT11 is the effective semi-aperture of the object-side face of the first lens, and DT72 is the effective semi-aperture of the image-side face of the seventh lens. By controlling the above conditions, it helps to ensure that the first lens can effectively collect light, and reduce light loss or scattering caused by the mismatch between the inner diameter of the lens barrel and the lens aperture. It can also optimize the light transmission efficiency and imaging quality of the entire lens system, which is beneficial to improving imaging clarity and contrast.

[0068] In an exemplary embodiment, the optical imaging lens satisfies: 4.80 < L / (CT1 + T12) < 6.50, where L is the maximum length of the lens barrel along the optical axis, T12 is the air gap between the first lens and the second lens on the optical axis, and CT1 is the central thickness of the first lens on the optical axis. By controlling the above conditions, it helps to optimize the overall length of the lens while maintaining certain optical performance, making it more compact and meeting the requirements of miniaturization and light weight for modern electronic devices. Moreover, the proportional relationship of this conditional formula provides clear guidance for the manufacturing and assembly processes, which can reduce errors in the manufacturing and assembly processes and improve the overall quality of the lens.

[0069] In an exemplary embodiment, the support element group further includes a second support element, which is placed between the second lens and the third lens and contacts the image side of the second lens; and the optical imaging lens satisfies: 1.70 < EP12 / T12 < 4.60, where EP12 is the distance along the optical axis from the image side of the first support element to the object side of the second support element, and T12 is the air gap between the first lens and the second lens on the optical axis. The second support element provides additional support for the second lens, which helps to reduce lens displacement caused by vibration or external shock; by precisely controlling the ratio of EP12 to T12, the relative positions between the lens groups can be adjusted, thereby optimizing the light transmission path, helping to reduce aberrations, distortions, and other optical defects, and improving the clarity and contrast of the imaging.

[0070] In an exemplary embodiment, the support element group further includes a second support element, which is placed between the second lens and the third lens and contacts the image side of the second lens; and the optical imaging lens satisfies: 15.60 < T23 / CP2 ≤ 39.00, where T23 is the air gap between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second support element. By controlling the above conditions, the internal space layout of the lens can be optimized, which helps to ensure that there is sufficient space for light transmission and refraction between each lens and support element, while avoiding unnecessary space waste.

[0071] In an exemplary embodiment, the abutting element group further includes a fourth abutting element, a fifth abutting element, and a sixth abutting element. The fourth abutting element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The fifth abutting element is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens. The sixth abutting element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens. And the optical imaging lens satisfies: 1.40 < (EP45 + EP56) / (CT5 + T56) < 2.2, where EP45 is the distance along the optical axis from the image side surface of the fourth abutting element to the object side surface of the fifth abutting element, EP56 is the distance along the optical axis from the image side surface of the fifth abutting element to the object side surface of the sixth abutting element, CT5 is the central thickness of the fifth lens on the optical axis, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis. By controlling the above conditions, the light transmission path between the lens groups can be optimized, aberration and distortion can be reduced, and the clarity and resolution of imaging can be improved. And the proportional relationship of (EP45 + EP56) / (CT5 + T56) may be optimized for a specific optical design to ensure that the lens achieves the best optical performance at a specific working distance and field of view angle. The fourth abutting element and the fifth abutting element respectively support the fourth lens and the fifth lens, ensuring the stable positions of the fourth lens and the fifth lens inside the lens. This stable support structure helps to reduce lens displacement caused by vibration or temperature changes, thereby improving the stability of imaging.

[0072] In an exemplary embodiment, the abutting element group further includes a sixth abutting element and a seventh abutting element. The sixth abutting element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens. The seventh abutting element is disposed on the image side of the seventh lens and contacts the image side surface of the seventh lens. And the optical imaging lens satisfies: 1.15 < d7s / d6m < 1.40, where d6m is the inner diameter of the image side surface of the sixth abutting element, and d7s is the inner diameter of the object side surface of the seventh abutting element. By controlling the above conditions, the space inside the lens can be utilized more effectively, which helps to ensure that there is enough space between each lens and abutting element for light transmission and refraction, while avoiding unnecessary space waste. The seventh abutting element provides additional support for the seventh lens, which helps to enhance the stability of the lens structure. At the same time, by controlling the proportional relationship between the inner diameters of the seventh abutting element and the sixth abutting element, the stability of the entire lens system can be further ensured, and lens displacement caused by vibration or external impact can be reduced.

[0073] In an exemplary embodiment, the support element group further includes a sixth support element and a seventh support element. The sixth support element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens, and the seventh support element is disposed on the image side of the seventh lens and contacts the image side surface of the seventh lens; and the optical imaging lens satisfies: 1.00 ≤ SG72 / EP67 < 1.90, where SG72 is the distance along the optical axis from the intersection of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element, and EP67 is the distance along the optical axis from the image side surface of the sixth support element to the object side surface of the seventh support element. By controlling the above conditions, the spatial relationship between the seventh lens and the sixth support element can be optimized, which helps to ensure that there is sufficient space between the lens and the support element for light transmission and refraction, while avoiding unnecessary space waste or interference; and the ratio range of SG72 / EP67 provides a degree of design freedom, and under the premise of ensuring the lens performance level, it can be fine-tuned according to the specific application scenario and requirements of the lens. This flexibility helps to meet the customized needs of different customers and promotes the innovation of lens design.

[0074] In an exemplary embodiment, the optical imaging lens satisfies: 0.70 < SG72 / SG71 < 1.00, where SG71 is the distance along the optical axis from the intersection of the object side surface of the seventh lens and the optical axis to the image side surface of the sixth support element, and SG72 is the distance along the optical axis from the intersection of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element. By controlling the above conditions, the edge ray processing of the lens can be optimized, and aberrations such as coma and astigmatism generated due to improper refraction or reflection of the edge rays of the lens can be reduced, and the appropriate ratio of SG71 and SG72 helps to ensure that the light can propagate along the expected path when passing through the lens, thereby improving the clarity and contrast of the image and further improving the imaging quality.

[0075] In an exemplary embodiment, the support element group further includes a sixth support element. The sixth support element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens; and the optical imaging lens satisfies: -20.60 ≤ (SG72 - SG71) / CP6 < -2.05, where SG71 is the distance along the optical axis from the intersection of the object side surface of the seventh lens and the optical axis to the image side surface of the sixth support element, SG72 is the distance along the optical axis from the intersection of the image side surface of the seventh lens and the optical axis to the object side surface of the seventh support element, and CP6 is the maximum thickness of the sixth support element. By controlling the above conditions, it helps to ensure the rationality of the lens interval and avoid the adverse effects of too large or too small intervals on the imaging quality; on the premise of meeting the imaging performance requirements, by reasonably setting the ratio of (SG72 - SG71) / CP6, the overall size and weight of the optical system can be reduced, making it more compact and portable, which is particularly important for mobile devices and portable optical instruments.

[0076] The second aspect of the present application provides an optical imaging lens, which includes a lens barrel, a lens group and a support element group accommodated in the lens barrel. The lens group is composed of a first lens with a positive focal power, a second lens with a negative focal power, a third lens with a positive or negative focal power, a fourth lens with a positive or negative focal power, a fifth lens with a positive or negative focal power, a sixth lens with a positive or negative focal power, and a seventh lens with a negative focal power arranged in sequence from the object side to the image side along the optical axis; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the third lens is convex, and the image side surface is concave; the object side surface of the fourth lens is convex; the object side surface of the sixth lens is convex, and the image side surface is concave; the object side surface of the seventh lens is convex, and the image side surface is concave; the support element group includes a first support element and a second support element. The first support element is placed between the first lens and the second lens and contacts the image side surface of the first lens, and the second support element is placed between the second lens and the third lens and contacts the image side surface of the second lens; the optical imaging lens satisfies: 2.55 < d0m / EPD < 2.75, 1.4mm -1 <f1 / CT1 / d1s < 1.8mm -1 and -18.85mm -1 <f2 / CT2 / d2s < -14.45mm -1 , where d0m is the inner diameter of the image side end face of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, f1 is the effective focal length of the first lens, CT1 is the central thickness of the first lens on the optical axis, d1s is the inner diameter of the object side surface of the first support element, f2 is the effective focal length of the second lens, CT2 is the central thickness of the second lens on the optical axis, and d2s is the inner diameter of the object side surface of the second support element.

[0077] The optical imaging lens of the present application is a large-aperture lens. The inner diameter of the image side end face of the lens barrel and the entrance pupil diameter of the optical imaging lens satisfy 2.55 < d0m / EPD < 2.75. By controlling the ratios of f1 / CT1 / d1s and f2 / CT2 / d2s, it helps to ensure the effective functions of the first lens and the second lens in the lens system, can optimize the refraction and focusing effects of light, reduce aberration and distortion, thereby improving the clarity and resolution of imaging, and can control the overall size of the lens to a certain extent. While maintaining the optical performance, the compact design of the lens is realized, which helps to meet the requirements of modern electronic devices for miniaturization and light weight.

[0078] Those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses and support elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0079] The following further describes specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings. Figures 3 to 5 Describe the optical imaging lens according to Embodiment 1 and Embodiment 2 of the present application; refer to Figures 6 to 8 Describe the optical imaging lens according to Embodiment 3 and Embodiment 4 of the present application; refer to Figures 9 to 11 Describe the optical imaging lens according to Embodiment 5 and Embodiment 6 of the present application; refer to Figure 12 to Figure 14 The optical imaging lenses according to Embodiment 7 and Embodiment 8 of the present application are described.

[0080] Example 1

[0081] Figure 3 FIG. 1 is a schematic diagram showing the structure of an optical imaging lens according to Embodiment 1 of the present application. Figure 3 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group disposed in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is disposed on the object side of the first lens E1.

[0082] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave.

[0083] The supporting element group includes a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a fifth supporting element P5, a sixth supporting element P6 and a seventh supporting element P7. The first supporting element P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting element P1 is at least partially in contact with the image side surface S2 of the first lens E1, and the image side surface of the first supporting element P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting element P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting element P2 is at least partially in contact with the image side surface S4 of the second lens E2, and the image side surface of the second supporting element P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting element P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting element P3 is at least partially in contact with the image side surface S6 of the third lens E3, and the image side surface of the third supporting element P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting element P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting element P4 is at least partially in contact with the image side surface S8 of the fourth lens E4, and the image side surface of the fourth supporting element P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting element P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting element P5 is at least partially in contact with the image side surface S10 of the fifth lens E5, and the image side surface of the fifth supporting element P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting element P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting element P6 is at least partially in contact with the image side surface S12 of the sixth lens E6, and the image side surface of the sixth supporting element P6 is at least partially in contact with the object side surface S13 of the seventh lens E7. The seventh supporting element P7 is placed on the image side of the seventh lens E7, and the object side surface of the seventh supporting element P7 is at least partially in contact with the image side surface S14 of the seventh lens E7.

[0084] In the example, a filter may be further disposed between the seventh lens E7 and the imaging surface S17 (not shown), and the filter has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0085] Table 1 shows the basic parameters of the lens group of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0086] Table 1

[0087]

[0088]

[0089] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0090]

[0091] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspheric surface S1 to S14 in Example 1.

[0092] Table 2

[0093]

[0094] Example 2

[0095] Figure 4 FIG. 2 shows a schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of the present application. Figure 4 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group arranged in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is arranged on the object side of the first lens E1. The supporting element group comprises a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a third supporting element P5, a sixth supporting element P6, and a seventh supporting element P7.

[0096] The seven-lens group of the optical imaging lens of this embodiment has the same structure as the seven-lens group of the optical imaging lens in Embodiment 1. The basic parameters thereof are detailed in Tables 1 and 2 and will not be described in detail.

[0097] The difference between this embodiment and the first embodiment is that the lens barrel P0 and at least some elements in the supporting element group have different structural dimensions.

[0098] Figure 5 (A1) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 1 and 2, which represent the meridional image curvature and the sagittal image curvature. Figure 5 (B1) in FIG. 1 shows the distortion curves of the optical imaging lenses of Example 1 and Example 2, which represent the distortion magnitude values ​​corresponding to different field angles. Figure 5(C1) in FIG. 1 shows the magnification chromatic aberration curves of the optical imaging lenses of Example 1 and Example 2, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Figure 5 It can be seen that the optical imaging lenses provided in Example 1 and Example 2 can achieve good imaging quality.

[0099] Example 3

[0100] Figure 6 FIG. 2 shows a schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of the present application. Figure 6 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group disposed in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is disposed on the object side of the first lens E1.

[0101] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave.

[0102] The supporting element group includes a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a fifth supporting element P5, a sixth supporting element P6 and a seventh supporting element P7. The first supporting element P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting element P1 is at least partially in contact with the image side surface S2 of the first lens E1, and the image side surface of the first supporting element P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting element P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting element P2 is at least partially in contact with the image side surface S4 of the second lens E2, and the image side surface of the second supporting element P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting element P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting element P3 is at least partially in contact with the image side surface S6 of the third lens E3, and the image side surface of the third supporting element P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting element P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting element P4 is at least partially in contact with the image side surface S8 of the fourth lens E4, and the image side surface of the fourth supporting element P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting element P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting element P5 is at least partially in contact with the image side surface S10 of the fifth lens E5, and the image side surface of the fifth supporting element P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting element P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting element P6 is at least partially in contact with the image side surface S12 of the sixth lens E6, and the image side surface of the sixth supporting element P6 is at least partially in contact with the object side surface S13 of the seventh lens E7. The seventh supporting element P7 is placed on the image side of the seventh lens E7, and the object side surface of the seventh supporting element P7 is at least partially in contact with the image side surface S14 of the seventh lens E7.

[0103] In the example, a filter may be further disposed between the seventh lens E7 and the imaging surface S17 (not shown), and the filter has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0104] Table 3 shows the basic parameters of the lens group of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0105] Table 3

[0106]

[0107] 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 aspherical surfaces, wherein the surface shape of each aspherical surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1. Table 4 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspherical surface S1 to S14 that can be used in embodiment 3.

[0108] Table 4

[0109]

[0110] Example 4

[0111] Figure 7 FIG. 4 is a schematic diagram showing the structure of an optical imaging lens according to Embodiment 4 of the present application. Figure 7 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group arranged in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is arranged on the object side of the first lens E1. The supporting element group comprises a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a third supporting element P5, a sixth supporting element P6, and a seventh supporting element P7.

[0112] The seven-lens group of the optical imaging lens of this embodiment has the same structure as the seven-lens group of the optical imaging lens in Embodiment 3. The basic parameters thereof are detailed in Tables 3 and 4 and will not be described in detail.

[0113] The difference between this embodiment and the third embodiment is that the lens barrel P0 and at least some elements in the supporting element group have different structural dimensions.

[0114] Figure 8 (A2) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 3 and 4, which represent the meridional image curvature and the sagittal image curvature. Figure 8 (B2) in FIG. 1 shows the distortion curves of the optical imaging lenses of Example 3 and Example 4, which represent the distortion magnitude values ​​corresponding to different field angles. Figure 8 (C2) in FIG. 1 shows the magnification chromatic aberration curves of the optical imaging lenses of Example 3 and Example 4, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Figure 8 It can be seen that the optical imaging lenses provided in Examples 3 and 4 can achieve good imaging quality.

[0115] Example 5

[0116] Fig. 9 FIG. 5 shows a schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of the present application. Fig. 9 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group disposed in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is disposed on the object side of the first lens E1.

[0117] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave.

[0118] The supporting element group includes a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a fifth supporting element P5, a sixth supporting element P6 and a seventh supporting element P7. The first supporting element P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting element P1 is at least partially in contact with the image side surface S2 of the first lens E1, and the image side surface of the first supporting element P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting element P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting element P2 is at least partially in contact with the image side surface S4 of the second lens E2, and the image side surface of the second supporting element P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting element P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting element P3 is at least partially in contact with the image side surface S6 of the third lens E3, and the image side surface of the third supporting element P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting element P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting element P4 is at least partially in contact with the image side surface S8 of the fourth lens E4, and the image side surface of the fourth supporting element P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting element P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting element P5 is at least partially in contact with the image side surface S10 of the fifth lens E5, and the image side surface of the fifth supporting element P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting element P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting element P6 is at least partially in contact with the image side surface S12 of the sixth lens E6, and the image side surface of the sixth supporting element P6 is at least partially in contact with the object side surface S13 of the seventh lens E7. The seventh supporting element P7 is placed on the image side of the seventh lens E7, and the object side surface of the seventh supporting element P7 is at least partially in contact with the image side surface S14 of the seventh lens E7.

[0119] In the example, a filter may be further disposed between the seventh lens E7 and the imaging surface S17 (not shown), and the filter has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0120] Table 5 shows the basic parameter table of the lens group of the optical imaging lens of Example 5, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0121] Table 5

[0122]

[0123]

[0124] 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 aspherical surfaces, wherein the surface shape of each aspherical surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1. Table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of each aspherical surface S1 to S14 that can be used in embodiment 5.

[0125] Table 6

[0126]

[0127] Example 6

[0128] Fig.10 FIG. 6 is a schematic diagram showing the structure of an optical imaging lens according to Embodiment 6 of the present application. Fig.10 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group arranged in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is arranged on the object side of the first lens E1. The supporting element group comprises a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a third supporting element P5, a sixth supporting element P6, and a seventh supporting element P7.

[0129] The seven-lens group of the optical imaging lens of this embodiment has the same structure as the seven-lens group of the optical imaging lens in Embodiment 5. The basic parameters thereof are detailed in Tables 5 and 6 and will not be described in detail.

[0130] The difference between this embodiment and Embodiment 5 is that the lens barrel P0 and at least some elements in the supporting element group have different structural dimensions.

[0131] Fig.11 (A3) shows the astigmatism curves of the optical imaging lenses of Examples 5 and 6, which represent the meridional image curvature and the sagittal image curvature. Fig.11 (B3) shows the distortion curves of the optical imaging lenses of Examples 5 and 6, which represent the distortion values ​​corresponding to different field angles. Fig.11 (C3) in FIG. 5 shows the magnification chromatic aberration curves of the optical imaging lenses of Example 5 and Example 6, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Fig.11 It can be seen that the optical imaging lenses provided in Examples 5 and 6 can achieve good imaging quality.

[0132] Example 7

[0133] Fig.12 FIG. 2 shows a schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of the present application. Fig.12 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group disposed in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is disposed on the object side of the first lens E1.

[0134] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative focal power, and its object side surface S9 is concave, and its image side surface S10 is concave. The sixth lens E6 has positive focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave.

[0135] The supporting element group includes a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a fifth supporting element P5, a sixth supporting element P6 and a seventh supporting element P7. The first supporting element P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting element P1 is at least partially in contact with the image side surface S2 of the first lens E1, and the image side surface of the first supporting element P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting element P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting element P2 is at least partially in contact with the image side surface S4 of the second lens E2, and the image side surface of the second supporting element P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting element P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting element P3 is at least partially in contact with the image side surface S6 of the third lens E3, and the image side surface of the third supporting element P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting element P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting element P4 is at least partially in contact with the image side surface S8 of the fourth lens E4, and the image side surface of the fourth supporting element P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting element P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting element P5 is at least partially in contact with the image side surface S10 of the fifth lens E5, and the image side surface of the fifth supporting element P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting element P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting element P6 is at least partially in contact with the image side surface S12 of the sixth lens E6, and the image side surface of the sixth supporting element P6 is at least partially in contact with the object side surface S13 of the seventh lens E7. The seventh supporting element P7 is placed on the image side of the seventh lens E7, and the object side surface of the seventh supporting element P7 is at least partially in contact with the image side surface S14 of the seventh lens E7.

[0136] In the example, a filter may be further disposed between the seventh lens E7 and the imaging surface S17 (not shown), and the filter has an object side surface S15 (not shown) and an image side surface S16 (not shown). Light from the object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0137] Table 7 shows the basic parameter table of the lens group of the optical imaging lens of Example 7, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0138] Table 7

[0139]

[0140] 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 aspherical surfaces, wherein the surface shape of each aspherical surface can be defined by, but not limited to, the formula (1) given in the above embodiment 1. Table 8 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical surface S1 to S14 in embodiment 7.

[0141] Table 8

[0142]

[0143]

[0144] Example 8

[0145] Fig.13 FIG. 8 is a schematic diagram showing the structure of an optical imaging lens according to Embodiment 8 of the present application. Fig.13 As shown, the optical imaging lens comprises a lens barrel P0, a seven-piece lens group arranged in the lens barrel P0, and a supporting element group. The seven-piece lens group comprises, in order from the object side to the image side along the optical axis: 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. A stop STO (not shown) is arranged on the object side of the first lens E1. The supporting element group comprises a first supporting element P1, a second supporting element P2, a third supporting element P3, a fourth supporting element P4, a third supporting element P5, a sixth supporting element P6, and a seventh supporting element P7.

[0146] The seven-lens group of the optical imaging lens of this embodiment has the same structure as the seven-lens group of the optical imaging lens in Example 7. The basic parameters thereof are detailed in Tables 7 to 8 and will not be described in detail.

[0147] The difference between this embodiment and Embodiment 7 is that the lens barrel P0 and at least some elements in the supporting element group have different structural dimensions.

[0148] Fig.14 (A4) in FIG. 1 shows the astigmatism curves of the optical imaging lenses of Examples 7 and 8, which represent the meridional image curvature and the sagittal image curvature. Fig.14 (B4) in FIG. 1 shows the distortion curves of the optical imaging lenses of Example 7 and Example 8, which represent the distortion magnitude values ​​corresponding to different field angles. Fig.14 (C4) in FIG. 4 shows the magnification chromatic aberration curves of the optical imaging lenses of Example 7 and Example 8, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. Fig.14 It can be seen that the optical imaging lenses provided in Examples 7 and 8 can achieve good imaging quality.

[0149] Table 9 gives the parameter values ​​of EPD, f, f1, f2, f3, f4, f5, f6, f7, DT11, and DT72 of each embodiment in Embodiment 1 to Embodiment 8, and the unit of each parameter value is millimeter (mm).

[0150] Table 9

[0151]

[0152]

[0153] Table 10 gives the values ​​of parameters of at least some elements in the lens barrel P0 and the supporting element group in each embodiment from Embodiment 1 to Embodiment 8. Among them, some parameters can be calculated according to Figure 1 and Figure 2 The parameters listed in Table 10 are measured using the marking method shown in the figure, and the units of the parameters listed in Table 10 are all millimeters (mm).

[0154] Table 10

[0155] Parameters / Examples 1 2 3 4 5 6 7 8 d1s 4.332 4.288 4.329 4.293 4.374 4.374 4.315 4.182 d2s 3.806 3.826 3.887 3.827 3.854 3.854 3.888 3.888 d6m 8.590 8.634 9.190 9.200 8.288 8.288 8.942 8.942 d7s 10.434 10.434 10.699 10.707 11.299 11.482 11.125 11.302 d0s 7.021 6.616 7.339 7.075 8.384 8.384 8.031 8.106 d0m 12.341 12.389 12.553 12.553 12.304 12.304 12.115 12.115 D0s 8.021 8.194 7.639 8.147 8.972 8.972 8.580 8.580 D0m 14.014 14.014 13.214 13.214 13.329 13.329 13.073 13.073 EP01 1.160 1.206 1.200 1.199 1.274 1.274 1.238 1.287 CP2 0.022 0.022 0.020 0.022 0.022 0.022 0.022 0.027 EP45 0.511 0.531 1.058 1.058 0.796 0.796 0.786 0.786 EP56 1.038 1.019 0.697 0.697 0.670 0.670 1.204 1.204 CP6 0.022 0.041 0.040 0.040 0.022 0.022 0.032 0.032 EP67 1.146 1.146 0.747 0.747 1.186 1.186 0.697 0.697 L 7.631 7.778 7.630 7.580 7.781 7.781 7.257 7.257 SG71 1.593 1.593 1.598 1.598 1.602 1.602 1.375 1.375 SG72 1.140 1.140 1.371 1.371 1.546 1.546 1.308 1.308 EP12 0.668 0.622 0.509 0.552 0.617 0.617 0.508 0.462

[0156] In summary, the optical imaging lenses in Examples 1 to 8 satisfy the relationship shown in Table 11.

[0157] Table 11

[0158]

[0159]

[0160] The present application also provides an electronic device equipped with the optical imaging lens described above. The electronic device can be a wearable device such as a VR helmet, a smart watch, and smart glasses, an independent imaging device such as a digital camera, or a mobile electronic device such as a mobile phone.

[0161] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: Comprising: A lens group, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having optical powers and arranged in sequence from the object side to the image side along the optical axis; A support element group, including a first support element, which is placed between the first lens and the second lens and contacts the image side surface of the first lens; A lens barrel, which houses the lens group and the support element group; The optical imaging lens satisfies: 2.55 < d0m / EPD < 2.75; 1.50 < d0s / d1s < 1.95; 1.45 < D0m / D0s < 1.80; and 0.90 < EP01 / CT1 < 1.15; Wherein, d0s is the inner diameter of the object side end face of the lens barrel, d0m is the inner diameter of the image side end face of the lens barrel, D0s is the outer diameter of the object side end face of the lens barrel, D0m is the outer diameter of the image side end face of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, EP01 is the distance between the object side end face of the lens barrel and the object side surface of the first support element along the optical axis direction, CT1 is the central thickness of the first lens on the optical axis, and d1s is the inner diameter of the object side surface of the first support element.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 2.80 < d0s / DT11 < 3.65, wherein, DT11 is the effective semi-aperture of the object side surface of the first lens.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 3.35 < d1s / CT1 ≤ 4.

10.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.40 mm -1 <f1 / CT1 / d1s<1.80mm -1 , where f1 is the effective focal length of the first lens.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 3.25 < D0s / DT11 < 3.90 and 2.35 < d0m / DT72 ≤ 2.50, wherein, DT11 is the effective semi-aperture of the object side surface of the first lens, and DT72 is the effective semi-aperture of the image side surface of the seventh lens.

6. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 4.80 < L / (CT1 + T12) < 6.50, wherein, L is the maximum length of the lens barrel along the optical axis direction, and T12 is the air gap between the first lens and the second lens on the optical axis.

7. The optical imaging lens according to claim 1, wherein: The support element group further includes a second support element, which is placed between the second lens and the third lens and contacts the image side surface of the second lens; and The optical imaging lens satisfies: 1.70 < EP12 / T12 < 4.60, wherein, EP12 is the distance between the image side surface of the first support element and the object side surface of the second support element along the optical axis direction, and T12 is the air gap between the first lens and the second lens on the optical axis.

8. The optical imaging lens according to claim 1, wherein: The support element group further includes a second support element, which is placed between the second lens and the third lens and contacts the image side surface of the second lens; and The optical imaging lens satisfies: 15.60 < T23 / CP2 ≤ 39.00, wherein, T23 is the air gap between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second support element.

9. The optical imaging lens according to claim 1, wherein: The bearing element group further includes a fourth bearing element, a fifth bearing element, and a sixth bearing element. The fourth bearing element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The fifth bearing element is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens. The sixth bearing element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens; and The optical imaging lens satisfies: 1.40 < (EP45 + EP56) / (CT5 + T56) < 2.20, where EP45 is the distance along the optical axis from the image side surface of the fourth bearing element to the object side surface of the fifth bearing element, EP56 is the distance along the optical axis from the image side surface of the fifth bearing element to the object side surface of the sixth bearing element, CT5 is the central thickness of the fifth lens on the optical axis, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis.

10. The optical imaging lens according to claim 1, wherein: The bearing element group further includes a sixth bearing element and a seventh bearing element. The sixth bearing element is disposed between the sixth lens and the seventh lens and contacts the image side surface of the sixth lens. The seventh bearing element is disposed on the image side of the seventh lens and contacts the image side surface of the seventh lens; and The optical imaging lens satisfies: 1.15 < d7s / d6m < 1.40, where d6m is the inner diameter of the image side surface of the sixth bearing element, and d7s is the inner diameter of the object side surface of the seventh bearing element.

Images