Optical imaging lens

Abstract

The invention discloses an optical imaging lens which comprises a lens barrel, a lens group and a bearing piece group, the lens group and the bearing piece group are contained in the lens barrel, and the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis and have focal power, the difference between the maximum outer diameters of the fourth lens and the fifth lens is smaller than the difference between the maximum outer diameters of the fifth lens and the sixth lens; the bearing piece set comprises a third bearing piece, a fourth bearing piece and a fifth bearing piece. The optical imaging lens satisfies the following conditions: 1.80 lt; fNO / tan (Semi-FOV) lt; 1.95, 7.75 lt, 1.95, 7.75 lt; eP45 / (CP4 + CP5) lt; 11.55, and 0.7 lt; cT4 / EP34 * N4lt; and 0.96%.

Description

Technical Field

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

[0002] In recent years, with the increasing changes in 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 the prior art, on the premise of ensuring a large aperture for the optical imaging lens, after light enters the optical imaging lens, the thickness, shape, etc. of the lens will affect the progress and stability of the light. In a seven-piece optical imaging lens, when the radial step difference between the fifth lens and the sixth lens changes significantly, the light exit angle will not be smooth, seriously affecting the clarity and resolution of the optical imaging lens, and further affecting the modulation transfer function (MTF) performance of the optical imaging lens. Summary of the Invention

[0004] One aspect of the present application provides an optical imaging lens, including a lens barrel and a lens group and a support member group accommodated in the lens barrel. The number of lenses with optical power in the lens group is seven, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens with optical power arranged in sequence from the object side to the image side along the optical axis. Among them, the difference between the maximum outer diameters of the fourth lens and the fifth lens is less than the difference between the maximum outer diameters of the fifth lens and the sixth lens; the support member group includes a third support member, a fourth support member, and a fifth support member. The third support member is placed between the third lens and the fourth lens and contacts the image side surface of the third lens. The fourth support member is placed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The fifth support member is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; and the optical imaging lens satisfies: 1.80 < FNO / tan(Semi-FOV) < 1.95; 7.75 < EP45 / (CP4 + CP5) < 11.55; and 0.7 < CT4 / EP34 * N4 < 0.96; where FNO is the aperture number of the optical imaging lens, EP45 is the distance along the optical axis from the image side surface of the fourth support member to the object side surface of the fifth support member, CP4 is the maximum thickness of the fourth support member, CP5 is the maximum thickness of the fifth support member, CT4 is the central thickness of the fourth lens on the optical axis, EP34 is the distance along the optical axis from the image side surface of the third support member to the object side surface of the fourth support member, N4 is the refractive index of the fourth lens, and Semi-FOV is half of the maximum field of view angle of the optical imaging lens.

[0005] According to an exemplary embodiment of the present application, the support member group further includes a first support member, the first support member is disposed between the first lens and the second lens and contacts the image side surface of the first lens; and the optical imaging lens satisfies: 3.1 < d0s / (EP01 + CT1) < 3.75, where d0s is the inner diameter of the object-side end surface of the lens barrel, EP01 is the distance between the object-side end surface of the lens barrel and the object-side surface of the first support member along the optical axis direction, and CT1 is the central thickness of the first lens on the optical axis.

[0006] According to an exemplary embodiment of the present application, the support member group further includes a first support member, the first support member is disposed between the first lens and the second lens and contacts the image side surface of the first lens; and the optical imaging lens satisfies: 0.3 < f1 / (R1 + R2) < 0.5 and 1.95 < d0s / d1s < 2.1, where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object-side surface of the first lens, R2 is the curvature radius of the image-side surface of the first lens, d0s is the inner diameter of the object-side end surface of the lens barrel, and d1s is the inner diameter of the object-side surface of the first support member.

[0007] According to an exemplary embodiment of the present application, the support member group further includes a first support member, the first support member is disposed between the first lens and the second lens and contacts the image side surface of the first lens; and the optical imaging lens satisfies: 1.65 < EP01 / SG11 < 1.9, where EP01 is the distance between the object-side end surface of the lens barrel and the object-side surface of the first support member along the optical axis direction, and SG11 is the axial distance from the intersection of the object-side surface of the first lens and the optical axis to the non-effective diameter region of the object-side surface of the first lens.

[0008] According to an exemplary embodiment of the present application, the support member group further includes a second support member, the second support member 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: 0.75 < EP23 / CT3 < 1.2, where EP23 is the distance between the image-side surface of the second support member and the object-side surface of the third support member along the optical axis direction, and CT3 is the central thickness of the third lens on the optical axis.

[0009] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.45 < EP45 / CT5 < 0.7, where CT5 is the central thickness of the fifth lens on the optical axis.

[0010] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 3.7 < f5 / d5s < 5.6, where f5 is the effective focal length of the fifth lens, and d5s is the inner diameter of the object-side surface of the fifth support member.

[0011] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.55 < (R10 - R9) / d5s < 1.05, where R9 is the radius of curvature of the object side surface of the fifth lens, R10 is the radius of curvature of the image side surface of the fifth lens, and d5s is the inner diameter of the object side surface of the fifth support member.

[0012] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.15 < (D5s - D4m) / d4s < 0.5, where D5s is the outer diameter of the object side surface of the fifth support member, D4m is the outer diameter of the image side surface of the fourth support member, and d4s is the inner diameter of the object side surface of the fourth support member.

[0013] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 10.35 < T34 / CP3 < 16.6, where T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP3 is the maximum thickness of the third support member.

[0014] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.65 < EP01 / SG11 < 1.9, where EP01 is the distance along the optical axis between the object side end surface of the lens barrel and the object side surface of the first support member, and SG11 is the axial distance from the intersection of the object side surface of the first lens and the optical axis to the object side surface of the non-effective diameter region of the first lens.

[0015] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 5.0 < (d0s + D0m) / EPD < 5.75, where d0s is the inner diameter of the object side end surface of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, and D0m is the outer diameter of the image side end surface of the lens barrel.

[0016] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.4 < d0m / d0s < 1.55, where d0m is the inner diameter of the image side end surface of the lens barrel, and d0s is the inner diameter of the object side end surface of the lens barrel.

[0017] According to an exemplary embodiment of the present application, the first support member is in contact with the object side surface of the second lens; the second support member is in contact with the object side surface of the third lens; the third support member is in contact with the object side surface of the fourth lens; the fourth support member is in contact with the object side surface of the fifth lens; the fifth support member is in contact with the object side surface of the sixth lens.

[0018] According to an exemplary embodiment of the present application, the first lens has a positive optical power, its object side is convex, and its image side is concave. The second lens has a negative optical power, its object side is convex, and its image side is concave. The third lens has a positive optical power, and its object side is convex. The fourth lens has a negative optical power, its object side is convex, and its image side is concave. The fifth lens has a positive optical power, its object side is concave, and its image side is convex. The sixth lens has a positive optical power, its object side is convex, and its image side is concave. The seventh lens has a negative optical power, its object side is convex, and its image side is concave.

[0019] Another aspect of the present application provides an optical imaging lens, including a lens barrel and a lens group and a support member group accommodated in the lens barrel. The number of lenses with optical power in the lens group is seven, including a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power arranged in sequence from the object side to the image side along the optical axis. Among them, the difference between the maximum outer diameters of the fourth lens and the fifth lens is less than the difference between the maximum outer diameters of the fifth lens and the sixth lens; the support member group includes a third support member, a fourth support member, and a fifth support member. The third support member is placed between the third lens and the fourth lens and contacts the image side of the third lens. The fourth support member is placed between the fourth lens and the fifth lens and contacts the image side of the fourth lens. The fifth support member is placed between the fifth lens and the sixth lens and contacts the image side of the fifth lens; and the optical imaging lens satisfies: 3.7 < f5 / d5s < 5.6; and 7.75 < EP45 / (CP4 + CP5) < 11.55, where f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side of the fifth support member, EP45 is the distance along the optical axis from the image side of the fourth support member to the object side of the fifth support member, CP4 is the maximum thickness of the fourth support member, and CP5 is the maximum thickness of the fifth support member.

[0020] For the optical imaging lens provided in this application, by controlling 1.80 < FNO / tan(Semi - FOV) < 1.95, the optical imaging lens is ensured to have the characteristic of a large aperture. After light enters the optical imaging lens, the thickness, shape, etc. of the lens will affect the process and stability of the light. In particular, the radial step difference between the fifth lens and the sixth lens suddenly increases. The fifth lens is a large convex lens with a thin edge and a thick center, and the fourth lens is a lens with a high refractive index. Therefore, by controlling EP45 / (CP4 + CP5) and CT4 / EP34 * N4, the edge thickness of the fifth lens and the ratio of the edge thickness to the center thickness of the fourth lens are ensured to be within a certain range, precisely controlling the optical path of the lens, avoiding uneven light exit angles caused by uneven thickness inside the lens, thereby improving the clarity and resolution of the imaging of the optical imaging lens, helping to reduce the optical loss inside the lens, improving the light transmittance. At the same time, by controlling the edge thicknesses of the fourth lens and the fifth lens within the above - mentioned range, a suitable tolerance sensitivity is ensured, reducing the influence of the edge thicknesses of the fourth lens and the fifth lens on the peak value of the MTF and the field curvature of the optical imaging lens, and improving the MTF performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects, and advantages of this application will become more apparent by reading the detailed description of the non - restrictive embodiments with reference to the following drawings. Among them:

[0022] Figure 1 Shows the structural layout diagram of an optical imaging lens of this application;

[0023] Figure 2 Shows the schematic diagram of some parameters of an optical imaging lens of this application;

[0024] Figure 3 Shows the structural schematic diagram of the optical imaging lens of Embodiment 1 of this application;

[0025] Figure 4 Shows the structural schematic diagram of the optical imaging lens of Embodiment 2 of this application;

[0026] 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;

[0027] Figure 6 Shows the structural schematic diagram of the optical imaging lens of Embodiment 3 of this application;

[0028] Figure 7 Shows the structural schematic diagram of the optical imaging lens of Embodiment 4 of this application;

[0029] Figure 8The astigmatism curve (A2), the distortion curve (B2) and the magnification chromatic aberration curve (C2) of the optical imaging lens of Example 3 and Example 4 of the present application are shown;

[0030] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0031] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0032] 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;

[0033] Fig.12 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0034] Fig.13 A schematic diagram showing the structure of the optical imaging lens of Example 8 of the present application is shown

[0035] 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;

[0036] Fig.15 The tolerance sensitivity curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=9.84 and CT4 / EP34*N4=0.92 is satisfied;

[0037] Fig.16 The modulation transfer function curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=9.84 and CT4 / EP34*N4=0.92 is satisfied;

[0038] Fig.17 The tolerance sensitivity curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=11.6 and CT4 / EP34*N4=1.1;

[0039] Fig.18 The modulation transfer function curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=11.6 and CT4 / EP34*N4=1.1;

[0040] Fig.19 The tolerance sensitivity curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=7.5 and CT4 / EP34*N4=0.68 is satisfied;

[0041] Fig. 20 The modulation transfer function curve of the optical imaging lens of the present application is shown when FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5)=7.5 and CT4 / EP34*N4=0.68 is satisfied. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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 description is relatively specific and detailed, but it 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 member group in each embodiment of the present application can be arbitrarily combined, and are not limited to the lens group in one embodiment can only be combined with the lens barrel, supporting member group, etc. of the embodiment.

[0049] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0050] Figure 1 The following is an exemplary diagram showing the structure arrangement and some parameters of an optical imaging lens of the present application. Figure 2 The following is a schematic diagram showing some parameters of an optical imaging lens of the present application, so as to facilitate a better understanding of the present application. Figure 1As 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, 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 member, d4s is the inner diameter of the object side face of the fourth supporting member, D4m is the outer diameter of the image side face of the fourth supporting member, d5s is the inner diameter of the object side face of the fifth supporting member, D5s is the outer diameter of the object side face of the fifth supporting member, EP01 is the distance between the object side end face of the lens barrel and the object side face of the first supporting member along the optical axis, EP23 is the distance from the image side face of the second supporting member to the object side face of the third supporting member along the optical axis, and EP34 is the distance from the image side face of the third supporting member to the object side face of the third supporting member. EP45 is the distance from the image side of the fourth supporting member to the object side of the fifth supporting member along the optical axis, CP3 is the maximum thickness of the third supporting member, CP4 is the maximum thickness of the fourth supporting member, CP5 is the maximum thickness of the fifth supporting member, P0 is the lens barrel, P1 is the first supporting member, P2 is the second supporting member, P3 is the third supporting member, P4 is the fourth supporting member, P5 is the fifth supporting member, P6 is the sixth supporting member, E1 is the first lens, E2 is the second lens, E3 is the third lens, E4 is the fourth lens, E5 is the fifth lens, E6 is the sixth lens, and E7 is the seventh lens. Figure 2 As shown, SG11 is the axial distance from the intersection of the object side surface of the first lens and the optical axis to the non-effective diameter area of ​​the object side surface of the first lens. It should be noted that the non-effective diameter area of ​​the object side surface of the first lens here refers to the position closest to the object side within the non-effective diameter area of ​​the object side surface of the first lens.

[0051] 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 side of the subject and an image side surface facing the side of the imaging surface. 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, any two adjacent lenses may have a spacing distance on the optical axis, and the spacing distance may be an air spacing.

[0052] 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. The fourth lens has negative optical power. The fifth lens has positive optical power. The sixth lens has positive optical power. The seventh lens has negative optical power.

[0053] 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 or convex. The object side surface of the fourth lens is convex, and the image side surface is concave. The object side surface of the fifth lens is concave, and the image side surface 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.

[0054] In an exemplary embodiment, the optical imaging lens further includes a lens barrel. The lens group and the supporting member 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.

[0055] 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.

[0056] In an exemplary embodiment, the optical imaging lens further includes a supporting member group, which may include at least one supporting member, which is disposed between the lenses and located in the non-effective diameter area of ​​the lenses. It should be understood that the present application does not specifically limit the number of supporting members, and at least one supporting member is disposed between any two adjacent lenses, and the entire optical imaging lens may also include any number of supporting members. The supporting member helps the optical imaging lens to intercept excess refractive and reflective light paths, reduce stray light and ghosting, and improve imaging quality. The shapes of the supporting members may be the same or different, as long as they can play the corresponding role.

[0057] In an exemplary embodiment, the bearing member group includes a first bearing member, a second bearing member, a third bearing member, a fourth bearing member, a fifth bearing member, and a sixth bearing member. The first bearing member is disposed between the first lens and the second lens and is at least partially in contact with the image side surface of the first lens and at least partially in contact with the object side surface of the second lens. The second bearing member is disposed between the second lens and the third lens and is at least partially in contact with the image side surface of the second lens and at least partially in contact with the object side surface of the third lens. The third bearing member is disposed between the third lens and the fourth lens and is at least partially in contact with the image side surface of the third lens and at least partially in contact with the object side surface of the fourth lens. The fourth bearing member is disposed between the fourth lens and the fifth lens and is at least partially in contact with the image side surface of the fourth lens and at least partially in contact with the object side surface of the fifth lens. The fifth bearing member is disposed between the fifth lens and the sixth lens and is at least partially in contact with the image side surface of the fifth lens and at least partially in contact with the object side surface of the sixth lens. The sixth bearing member is disposed between the sixth lens and the seventh lens and is at least partially in contact with the image side surface of the sixth lens and at least partially in contact with the object side surface of the seventh lens.

[0058] In an exemplary embodiment, the difference between the maximum outer diameters of the fourth lens and the fifth lens is less than the difference between the maximum outer diameters of the fifth lens and the sixth lens. The optical imaging lens satisfies: 1.80 < FNO / tan(Semi-FOV) < 1.95, 7.75 < EP45 / (CP4 + CP5) < 11.55, and 0.7 < CT4 / EP34*N4 < 0.96, where FNO is the aperture number of the optical imaging lens, EP45 is the distance along the optical axis from the image side surface of the fourth bearing member to the object side surface of the fifth bearing member, CP4 is the maximum thickness of the fourth bearing member, CP5 is the maximum thickness of the fifth bearing member, CT4 is the central thickness of the fourth lens on the optical axis, EP34 is the distance along the optical axis from the image side surface of the third bearing member to the object side surface of the fourth bearing member, N4 is the refractive index of the fourth lens, and Semi-FOV is half of the maximum field of view angle of the optical imaging lens. It should be noted that the maximum outer diameter of the lens refers to the position where the outer ring surface of the lens is parallel to the optical axis.

[0059] By controlling 1.80 < FNO / tan(Semi - FOV) < 1.95 in this application, it is ensured that the optical imaging lens has the characteristic of a large aperture. After light enters the optical imaging lens, the thickness, shape, etc. of the lens will affect the progress and stability of the light. Especially, the radial step difference between the fifth lens and the sixth lens suddenly increases. The fifth lens is a large convex lens with a thin edge and a thick center, and the fourth lens is a lens with a high refractive index. Therefore, by controlling EP45 / (CP4 + CP5) and CT4 / EP34*N4, the edge thickness of the fifth lens and the ratio of the edge thickness to the center thickness of the fourth lens are ensured to be within a certain range, precisely controlling the optical path of the lens, avoiding uneven light emission angles inside the lens caused by uneven thickness, thereby improving the clarity and resolution of the optical imaging lens imaging, helping to reduce the optical loss inside the lens, improving the light transmittance. At the same time, by controlling the edge thicknesses of the fourth lens and the fifth lens within the above range, a suitable tolerance sensitivity is ensured, reducing the influence of the edge thicknesses of the fourth lens and the fifth lens on the peak value of the MTF and the field curvature of the optical imaging lens, and improving the MTF performance.

[0060] Fig.15 and Fig.16 respectively show the tolerance sensitivity curve and the modulation transfer function curve of the optical imaging lens of this application when FNO / tan(Semi - FOV) = 1.92, EP45 / (CP4 + CP5) = 9.84, and CT4 / EP34*N4 = 0.92;

[0061] Fig.17 and Fig.18 respectively show the tolerance sensitivity curve and the modulation transfer function curve of the optical imaging lens of this application when FNO / tan(Semi - FOV) = 1.92, EP45 / (CP4 + CP5) = 11.6, and CT4 / EP34*N4 = 1.1;

[0062] Fig.19 and Fig. 20 respectively show the tolerance sensitivity curve and the modulation transfer function curve of the optical imaging lens of this application when FNO / tan(Semi - FOV) = 1.92, EP45 / (CP4 + CP5) = 7.5, and CT4 / EP34*N4 = 0.68.

[0063] Fig.15 and Fig.16The optical imaging lens therein meets the ranges defined by the conditional expressions FNO / tan(Semi-FOV)=1.92, EP45 / (CP4+CP5), and CT4 / EP34*N4 of this application. On the premise of ensuring that the optical imaging lens has a large aperture, it can accurately control the optical path of the lens, avoid the uneven light emission angle caused by uneven thickness inside the lens, thereby improving the imaging clarity and resolution of the optical imaging lens, helping to reduce the optical loss inside the lens, improve the light transmittance, and at the same time ensure an appropriate tolerance sensitivity by controlling the edge thicknesses of the fourth lens and the fifth lens within the above ranges, reducing the influence of the edge thicknesses of the fourth lens and the fifth lens on the peak value of the MTF and the field curvature of the optical imaging lens. As can be seen from the figure, the defocus curve is relatively concentrated, and the MTF peak value is relatively high, effectively reducing the tolerance sensitivity.

[0064] Fig.17 and Fig.18 The optical imaging lens therein exceeds the ranges defined by the conditional expressions EP45 / (CP4+CP5) and CT4 / EP34*N4 of this application. On the premise that the optical imaging lens has a large aperture, due to the excessive distance between the fourth bearing member and the fifth bearing member along the optical axis direction, the light passing through the fifth lens becomes steeper. As can be seen from the figure, the MTF peak value decreases, and the tolerance sensitivity becomes worse; moreover, the distance between the image side surface of the third bearing member and the object side surface of the fourth bearing member along the optical axis direction becomes smaller, resulting in the optical imaging lens being more sensitive to eccentricity and tilt, and the overall field curvature increases, affecting the imaging effect.

[0065] Fig.19 and Fig. 20 The optical imaging lens therein exceeds the ranges defined by the conditional expressions EP45 / (CP4+CP5) and CT4 / EP34*N4 of this application. On the premise that the optical imaging lens has a large aperture, due to the过小 distance between the fourth bearing member and the fifth bearing member along the optical axis direction, the sensitivity of the edge surface shape passing through the fifth lens increases, and the peak value of the edge field of view decreases; at the same time, the distance between the image side surface of the third bearing member and the object side surface of the fourth bearing member along the optical axis direction becomes larger, resulting in the optical imaging lens being less sensitive to eccentricity and tilt, but the propagation of peripheral light becomes steeper, and the peak value of the edge field of view decreases significantly, affecting the imaging effect.

[0066] In an exemplary embodiment, the optical imaging lens satisfies: 3.1 < d0s / (EP01+CT1) < 3.75, where d0s is the inner diameter of the object side end surface of the lens barrel, EP01 is the distance between the object side end surface of the lens barrel and the object side surface of the first bearing member along the optical axis direction, and CT1 is the central thickness of the first lens on the optical axis. By controlling the above conditions, it helps to avoid the highest point of the object side surface of the first lens protruding beyond the object side end surface of the lens barrel, prevent the object side surface of the first lens from being scratched during assembly or finished product transportation, and further reduce the risk of the decrease in the imaging clarity of the optical imaging lens.

[0067] In an exemplary embodiment, the optical imaging lens satisfies: 0.75 < EP23 / CT3 < 1.2, where EP23 is the distance along the optical axis from the image side of the second bearing member to the object side of the third bearing member, and CT3 is the central thickness of the third lens on the optical axis. By controlling the above conditions, it helps to make the overall structure of the third lens uniform, avoid the risk of molding defects caused by excessive difference between the edge thickness and the central thickness, especially avoid the serious edge deformation during demolding of the third lens, which reduces the roundness of the object side mating position of the third lens, and further reduces the risk of deterioration of the MTF performance after assembly.

[0068] In an exemplary embodiment, the optical imaging lens satisfies: 0.45 < EP45 / CT5 < 0.7, where EP45 is the distance along the optical axis from the image side of the fourth bearing member to the object side of the fifth bearing member, and CT5 is the central thickness of the fifth lens on the optical axis. By controlling the above conditions, it helps to avoid risks such as weld marks, gas entrapment, or demolding deformation during the molding of the fifth lens due to an excessive ratio of the edge thickness to the central thickness of the fifth lens, thereby reducing the risk of defects in the surface shape of the fifth lens and improving the effectiveness and authenticity of the final imaging of the optical imaging lens.

[0069] In an exemplary embodiment, the optical imaging lens satisfies: 3.7 < f5 / d5s < 5.6, where f5 is the effective focal length of the fifth lens and d5s is the inner diameter of the object side of the fifth bearing member. By controlling the above conditions, it helps to control the processability of the overall fifth lens while ensuring the formation of complementary optical power for the light passing through the fifth lens; at the same time, controlling the inner diameter of the object side of the fifth bearing member can avoid the risk of reducing the imaging effectiveness due to the interception of effective imaging light caused by an overly small inner diameter; an overly large inner diameter may cause light leakage or ineffective interception of non-effective imaging light, resulting in noise on the image plane and reducing the authenticity of the entire image plane.

[0070] In an exemplary embodiment, the optical imaging lens satisfies: 0.55 < (R10 - R9) / d5s < 1.05, where R9 is the curvature radius of the object side of the fifth lens, R10 is the curvature radius of the image side of the fifth lens, and d5s is the inner diameter of the object side of the fifth bearing member. By controlling the above conditions, it helps to avoid the risk of edge reverse curvature on the edge of the image side of the fifth lens, and further avoid the risk of stray light generated by the penetration of the inner reverse light of the fifth lens through the gap to the image plane due to an overly large gap between the inner diameter of the object side of the fifth bearing member and the edge of the effective diameter region of the fifth lens.

[0071] In an exemplary embodiment, the optical imaging lens satisfies: 0.15 < (D5s - D4m) / d4s < 0.5, where D5s is the outer diameter of the object side surface of the fifth bearing member, D4m is the outer diameter of the image side surface of the fourth bearing member, and d4s is the inner diameter of the object side surface of the fourth bearing member. By controlling the above conditions, it helps to ensure a uniform transition in the wall thickness at the bearing location of the fifth lens in the lens barrel, avoid the risk of abrupt changes in the lens barrel thickness resulting in molding defects such as sink marks and gas entrapment, and improve the stability and strength of the overall lens assembly.

[0072] In an exemplary embodiment, the optical imaging lens satisfies: 10.35 < T34 / CP3 < 16.6, where T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP3 is the maximum thickness of the third bearing member. By controlling the above conditions, it helps to ensure that the distance between the effective diameter edge of the image side surface of the third lens and the effective diameter edge of the object side surface of the fourth lens is neither too large nor too small after the placement of the third bearing member, can prevent non-effective light rays from passing through the lens and imaging on the imaging surface, and can also prevent interference between the inner side of the third bearing member and the effective diameter edges of the image side surface of the third lens and the object side surface of the fourth lens respectively, thereby improving the imaging quality and authenticity of the optical imaging lens.

[0073] In an exemplary embodiment, the bearing member group further includes a first bearing member, which is placed between the first lens and the second lens and contacts the image side surface of the first lens; and the optical imaging lens satisfies: 0.3 < f1 / (R1 + R2) < 0.5; and 1.95 < d0s / d1s < 2.1; where f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, d0s is the inner diameter of the object side end face of the lens barrel, and d1s is the inner diameter of the object side surface of the first bearing member. By controlling the above conditions, it helps to avoid the situation where the center thickness of the first lens is too large while the edge aperture of the lens is too small, maximally reduce the probability of weld lines generated during the molding of the first lens remaining in the effective diameter area, maximally improve the imaging clarity, and obtain high-quality imaging. Exemplarily, 0.3 < f1 / (R1 + R2) < 0.45.

[0074] In an exemplary embodiment, the optical imaging lens satisfies: 1.65 < EP01 / SG11 < 1.9, where EP01 is the distance between the object-side end face of the lens barrel and the object-side surface of the first bearing member along the optical axis, and SG11 is the axial distance from the intersection of the object-side surface of the first lens and the optical axis to the non-effective diameter region of the object-side surface of the first lens. By controlling the above conditions, it helps to ensure that the thickness of the diaphragm hole at the front end of the lens barrel is neither too thick nor too thin. If it is too thick, although the assembly strength at the front end of the lens barrel is ensured, the front end protrudes too much, which risks blocking the marginal light rays of the maximum field of view angle and causing the imaging area to shrink. If it is too thin, although the imaging light rays within the field of view angle are not blocked, the front end of the lens barrel is too thin and its strength is low, making it extremely easy to deform or crack during the lens assembly under pressure, affecting the imaging quality of the optical imaging lens.

[0075] In an exemplary embodiment, the optical imaging lens satisfies: 5.0 < (d0s + D0m) / EPD < 5.75, where d0s is the inner diameter of the object-side end face of the lens barrel, EPD is the entrance pupil diameter of the optical imaging lens, and D0m is the outer diameter of the image-side end face of the lens barrel. By controlling the above conditions, for an optical imaging lens with a large field of view angle, it helps to avoid the risk that the actual field of view angle is too large and lower than the theoretical design value due to too small a ratio of (d0s + D0m) / EPD, which affects the chief ray angle of incidence (CRA) and relative illumination (RI) of imaging. At the same time, it can also avoid the risk that the front end of the lens barrel is too large due to too large a ratio of (d0s + D0m) / EPD, and the lens occupies a large space when assembled with the module into the device or interferes with other components of the device.

[0076] In an exemplary embodiment, the optical imaging lens satisfies: 1.4 < d0m / d0s < 1.55, where d0m is the inner diameter of the image-side end face of the lens barrel and d0s is the inner diameter of the object-side end face of the lens barrel. By controlling the above conditions, it helps with the design of the lens assembly and the bearing fixture. At the same time, the limitation of the inner diameter of the image-side end face of the lens barrel is very beneficial for eliminating the non-effective imaging light rays of the last lens on the imaging surface side, and can effectively avoid the generation of stray light or light leakage that affects the imaging quality.

[0077] In an exemplary embodiment, the first bearing member contacts the object-side surface of the second lens; the second bearing member contacts the object-side surface of the third lens; the third bearing member contacts the object-side surface of the fourth lens; the fourth bearing member contacts the object-side surface of the fifth lens; the fifth bearing member contacts the object-side surface of the sixth lens. The image-side surfaces of the bearing members in the bearing member group all contact at least partially with the object-side surface of the subsequent lens to ensure that the bearing members are fixed within the allowable range designed for the lens, and to avoid the effective imaging light rays being intercepted or non-imaging light rays penetrating to the imaging surface due to the movement of the bearing members in the optical axis direction, which affects the imaging quality, RI, CRA and other optical properties.

[0078] Another aspect of the present application provides an optical imaging lens, including a lens barrel, a lens group and a support member group accommodated in the lens barrel. The number of lenses in the lens group is seven, including a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power, which are arranged in sequence from the object side to the image side along the optical axis. Among them, the difference between the maximum outer diameters of the fourth lens and the fifth lens is less than the difference between the maximum outer diameters of the fifth lens and the sixth lens; the support member group includes a third support member, a fourth support member and a fifth support member. The third support member is placed between the third lens and the fourth lens and contacts the image side surface of the third lens. The fourth support member is placed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The fifth support member is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; and the optical imaging lens satisfies: 3.7 < f5 / d5s < 5.6; and 7.75 < EP45 / (CP4 + CP5) < 11.55, where f5 is the effective focal length of the fifth lens, d5s is the inner diameter of the object side surface of the fifth support member, EP45 is the distance along the optical axis from the image side surface of the fourth support member to the object side surface of the fifth support member, CP4 is the maximum thickness of the fourth support member, and CP5 is the maximum thickness of the fifth support member.

[0079] By controlling the above conditions, the present application helps to satisfy the complementary front and rear focal powers of each lens in the lens and ensure good processability of the lens. After being placed, the support members all contact the object side surfaces of the lenses, in order to prevent the support members from moving in the optical axis direction, resulting in the inner diameter of the object side surface of the support member overly intercepting light or allowing light to penetrate to the imaging surface, so that the ability of the imaged picture to restore real things is much lower than the design requirements, or non-effective imaging light penetrates to the imaging surface to form an image, resulting in serious stray light phenomenon on the image surface and reducing the authenticity and effectiveness of imaging.

[0080] 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 members constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0081] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings. Specifically, refer to 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 Describe the optical imaging lens according to Embodiment 7 and Embodiment 8 of the present application.

[0082] Example 1

[0083] 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 member 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.

[0084] 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 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. The difference between the maximum outer diameters of the fourth lens and the fifth lens is smaller than the difference between the maximum outer diameters of the fifth lens and the sixth lens.

[0085] The supporting member group includes a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5 and a sixth supporting member P6. The first supporting member P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting member 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 member P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting member P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting member 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 member P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting member P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting member 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 member P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting member P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting member 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 member P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting member P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting member 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 member P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting member P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting member 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 member P6 is at least partially in contact with the object side surface S13 of the seventh lens E7.

[0086] 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.

[0087] 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).

[0088] Table 1

[0089]

[0090]

[0091] 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:

[0092]

[0093] 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.

[0094] Table 2

[0095]

[0096] Example 2

[0097] 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 member 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 member group comprises a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6.

[0098] 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.

[0099] The difference between this embodiment and the first embodiment is that the lens barrel P0 and at least some components in the supporting member group have different structural dimensions.

[0100] 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.

[0101] Example 3

[0102] 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 member 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.

[0103] 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 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 positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. 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. The difference between the maximum outer diameters of the fourth lens and the fifth lens is smaller than the difference between the maximum outer diameters of the fifth lens and the sixth lens.

[0104] The supporting member group includes a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5 and a sixth supporting member P6. The first supporting member P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting member 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 member P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting member P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting member 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 member P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting member P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting member 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 member P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting member P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting member 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 member P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting member P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting member 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 member P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting member P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting member 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 member P6 is at least partially in contact with the object side surface S13 of the seventh lens E7.

[0105] 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.

[0106] 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).

[0107] Table 3

[0108]

[0109] 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.

[0110] Table 4

[0111]

[0112]

[0113] Example 4

[0114] Figure 7 FIG. 4 shows a schematic diagram of 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 member 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 member group comprises a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6.

[0115] 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.

[0116] The difference between this embodiment and Embodiment 3 is that the lens barrel P0 and at least some elements in the supporting member group have different structural dimensions.

[0117] 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.

[0118] Example 5

[0119] 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 member 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.

[0120] 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 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. The difference between the maximum outer diameters of the fourth lens and the fifth lens is smaller than the difference between the maximum outer diameters of the fifth lens and the sixth lens.

[0121] The supporting member group includes a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5 and a sixth supporting member P6. The first supporting member P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting member 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 member P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting member P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting member 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 member P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting member P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting member 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 member P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting member P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting member 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 member P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting member P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting member 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 member P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting member P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting member 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 member P6 is at least partially in contact with the object side surface S13 of the seventh lens E7.

[0122] 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.

[0123] 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).

[0124] Table 5

[0125]

[0126] 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.

[0127] Table 6

[0128]

[0129] Example 6

[0130] 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 member 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 member group comprises a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6.

[0131] 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.

[0132] The difference between this embodiment and Embodiment 5 is that the lens barrel P0 and at least some elements in the supporting member group have different structural dimensions.

[0133] 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.

[0134] Example 7

[0135] Fig.12FIG. 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 member 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.

[0136] 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 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. The difference between the maximum outer diameters of the fourth lens and the fifth lens is smaller than the difference between the maximum outer diameters of the fifth lens and the sixth lens.

[0137] The supporting member group includes a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5 and a sixth supporting member P6. The first supporting member P1 is placed between the first lens E1 and the second lens E2, and the object side surface of the first supporting member 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 member P1 is at least partially in contact with the object side surface S3 of the second lens E2. The second supporting member P2 is placed between the second lens E2 and the third lens E3, and the object side surface of the second supporting member 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 member P2 is at least partially in contact with the object side surface S5 of the third lens E3. The third supporting member P3 is placed between the third lens E3 and the fourth lens E4, and the object side surface of the third supporting member 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 member P3 is at least partially in contact with the object side surface S7 of the fourth lens E4. The fourth supporting member P4 is placed between the fourth lens E4 and the fifth lens E5, and the object side surface of the fourth supporting member 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 member P4 is at least partially in contact with the object side surface S9 of the fifth lens E5. The fifth supporting member P5 is placed between the fifth lens E5 and the sixth lens E6, and the object side surface of the fifth supporting member 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 member P5 is at least partially in contact with the object side surface S11 of the sixth lens E6. The sixth supporting member P6 is placed between the sixth lens E6 and the seventh lens E7, and the object side surface of the sixth supporting member 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 member P6 is at least partially in contact with the object side surface S13 of the seventh lens E7.

[0138] 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.

[0139] Table 7 shows a 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).

[0140] Table 7

[0141]

[0142]

[0143] 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.

[0144] Table 8

[0145]

[0146] Example 8

[0147] 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 member 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 member group comprises a first supporting member P1, a second supporting member P2, a third supporting member P3, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6.

[0148] 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.

[0149] The difference between this embodiment and Embodiment 7 is that the lens barrel P0 and at least some elements in the supporting member group have different structural dimensions.

[0150] 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.

[0151] Table 9 gives the parameter values ​​of FNO, Semi-FOV, f, f1, f2, f3, f4, f5, f6, f7, and SG11 of each embodiment in Embodiment 1 to Embodiment 8.

[0152] Table 9

[0153]

[0154] Table 10 gives the values ​​of parameters of at least some elements in the lens barrel P0 and the supporting member group in each embodiment from Embodiment 1 to Embodiment 8. Among them, some parameters can be calculated according to Figure 1 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).

[0155] Table 10

[0156]

[0157]

[0158] In summary, the optical imaging lenses in Examples 1 to 8 satisfy the relationship shown in Table 11.

[0159] Table 11

[0160] Conditional / Example 1 2 3 4 5 6 7 8 FNO / tan(Semi-FOV) 1.92 1.92 1.85 1.85 1.88 1.88 1.85 1.85 EP45 / (CP4+CP5) 9.84 9.84 10.41 10.50 11.52 11.50 7.77 8.00 CT4 / EP34*N4 0.92 0.84 0.91 0.83 0.94 0.94 0.80 0.75 f5 / d5s 3.75 3.75 4.28 4.28 5.56 5.50 4.31 4.29 (D5s-D4m) / d4s 0.37 0.37 0.37 0.19 0.38 0.37 0.48 0.45 EP45 / CT5 0.49 0.49 0.62 0.63 0.66 0.66 0.54 0.55 EP23 / CT3 1.15 0.98 1.02 0.92 0.80 0.81 1.07 0.98 (d0s+D0m) / EPD 5.04 5.25 5.22 5.22 5.19 5.19 5.23 5.70 d0s / (EP01+CT1) 3.30 3.39 3.25 3.33 3.14 3.22 3.72 3.69 d0m / d0s 1.44 1.44 1.50 1.49 1.51 1.49 1.54 1.54 T34 / CP3 11.10 11.10 16.56 16.56 10.37 10.37 16.05 16.05 (R10-R9) / d5s 0.76 0.76 0.65 0.65 0.59 0.59 1.04 1.03 f1 / (R1+R2) 0.33 0.33 0.38 0.38 0.43 0.43 0.44 0.44 d0s / d1s 2.08 2.06 2.06 2.03 2.00 1.98 2.04 2.05 EP01 / SG11 1.88 1.78 1.88 1.78 1.88 1.78 1.69 1.71

[0161] 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.

[0162] 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 including 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, arranged in sequence from the object side to the image side along the optical axis, wherein the difference between the maximum outer diameters of the fourth lens and the fifth lens is less than the difference between the maximum outer diameters of the fifth lens and the sixth lens; A support member group including a third support member, a fourth support member, and a fifth support member, the third support member being disposed between the third lens and the fourth lens and in contact with the image side surface of the third lens, the fourth support member being disposed between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, and the fifth support member being disposed between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; and A lens barrel accommodating the lens group and the support member group; The number of lenses having optical powers in the lens group is seven; The optical imaging lens satisfies: 1.80 < FNO / tan(Semi - FOV) < 1.95; 7.75 < EP45 / (CP4 + CP5) < 11.55; and 0.7 < CT4 / EP34 * N4 < 0.96; wherein, FNO is the f - number of the optical imaging lens, EP45 is the distance along the optical axis from the image side surface of the fourth support member to the object side surface of the fifth support member, CP4 is the maximum thickness of the fourth support member, CP5 is the maximum thickness of the fifth support member, CT4 is the central thickness of the fourth lens on the optical axis, EP34 is the distance along the optical axis from the image side surface of the third support member to the object side surface of the fourth support member, N4 is the refractive index of the fourth lens, and Semi - FOV is half of the maximum field of view angle of the optical imaging lens.

2. The optical imaging lens according to claim 1, wherein: The support member group further includes a first support member, the first support member being disposed between the first lens and the second lens and in contact with the image side surface of the first lens; and The optical imaging lens satisfies: 3.1 < d0s / (EP01 + CT1) < 3.75, wherein, d0s is the inner diameter of the object - side end face of the lens barrel, EP01 is the distance along the optical axis between the object - side end face of the lens barrel and the object side surface of the first support member, and CT1 is the central thickness of the first lens on the optical axis.

3. The optical imaging lens according to claim 1, wherein: The support member group further includes a first support member, the first support member being disposed between the first lens and the second lens and in contact with the image side surface of the first lens; and The optical imaging lens satisfies: 0.3 < f1 / (R1 + R2) < 0.5 and 1.95 < d0s / d1s < 2.1, wherein, f1 is the effective focal length of the first lens, R1 is the curvature radius of the object side surface of the first lens, R2 is the curvature radius of the image side surface of the first lens, d0s is the inner diameter of the object - side end face of the lens barrel, and d1s is the inner diameter of the object side surface of the first support member.

4. The optical imaging lens according to claim 1, wherein: The support member group further includes a first support member, the first support member being disposed between the first lens and the second lens and in contact with the image side surface of the first lens; and The optical imaging lens satisfies: 1.65 < EP01 / SG11 < 1.9, where EP01 is the distance along the optical axis between the object-side end face of the lens barrel and the object-side surface of the first supporting member, and SG11 is the axial distance from the intersection of the object-side surface of the first lens and the optical axis to the non-effective diameter region of the object-side surface of the first lens.

5. The optical imaging lens according to claim 1, wherein: The supporting member group further includes a second supporting member, which 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: 0.75 < EP23 / CT3 < 1.2, where EP23 is the distance along the optical axis from the image-side surface of the second supporting member to the object-side surface of the third supporting member, and CT3 is the central thickness of the third lens on the optical axis.

6. The optical imaging lens according to any one of claims 1 to 5, characterized in that: The optical imaging lens satisfies: 0.45 < EP45 / CT5 < 0.7, where CT5 is the central thickness of the fifth lens on the optical axis.

7. The optical imaging lens according to any one of claims 1 to 5, characterized in that: The optical imaging lens satisfies: 3.7 < f5 / d5s < 5.6, where f5 is the effective focal length of the fifth lens, and d5s is the inner diameter of the object-side surface of the fifth supporting member.

8. The optical imaging lens according to any one of claims 1 to 5, characterized in that: The optical imaging lens satisfies: 0.55 < (R10 - R9) / d5s < 1.05, where R9 is the curvature radius of the object-side surface of the fifth lens, R10 is the curvature radius of the image-side surface of the fifth lens, and d5s is the inner diameter of the object-side surface of the fifth supporting member.

9. The optical imaging lens according to any one of claims 1 to 5, characterized in that: The optical imaging lens satisfies: 0.15 < (D5s - D4m) / d4s < 0.5, where D5s is the outer diameter of the object-side surface of the fifth supporting member, D4m is the outer diameter of the image-side surface of the fourth supporting member, and d4s is the inner diameter of the object-side surface of the fourth supporting member.

10. The optical imaging lens according to any one of claims 1 to 5, characterized in that: The optical imaging lens satisfies: 10.35 < T34 / CP3 < 16.6, where T34 is the air gap between the third lens and the fourth lens on the optical axis, and CP3 is the maximum thickness of the third supporting member.

Images