Optical imaging lens

Abstract

The utility model discloses an optical imaging lens. The optical imaging lens comprises a lens cone assembly, an optical lens group and a spacing element group, wherein the optical lens group and the spacing element group are arranged in the lens cone assembly; the optical lens group comprises 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. The spacing element group comprises a second spacing element arranged on the image side surface of the second lens and a third spacing element arranged on the image side surface of the third lens; the optical imaging lens satisfies the following conditions: 1.2 lt; cT3 / EP23lt; 2.45,-5.8 lt, 2.45,-5.8 lt; r < 6 > / (D3s-d3s) < lt >; -2.7, and 5.0 lt; f3 / (CP2 + T23) lt; cT3 is the center thickness of the third lens on the optical axis, EP23 is the distance between the second spacer element and the third spacer element along the optical axis, R6 is the radius of curvature of the image side surface of the third lens, D3s is the outer diameter of the object side surface of the third spacer element, d3s is the inner diameter of the object side surface of the third spacer element, f3 is the effective focal length of the third lens, CP2 is the maximum thickness of the second spacer element, and R6 is the radius of curvature of the image side surface of the third lens. And T23 is an air gap between the second lens and the third lens on the optical axis.

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] Seven-piece optical imaging lenses have become the mainstream and are widely used in fields such as mobile phones, virtual reality technology, augmented reality technology, and machine vision technology. However, when the intermediate lens of a seven-piece optical imaging lens, such as the third lens and the spacer elements near it, are not properly arranged, there will be较多 stray light in the optical imaging lens, thus affecting the performance of the optical imaging lens. Utility Model Content

[0004] This application provides an optical imaging lens in one aspect. It includes a lens barrel assembly, an optical lens group, and a spacer element group placed inside the lens barrel assembly. The optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis; the spacer element group includes a second spacer element placed on the image side of the second lens and in contact with the image side of the second lens, and a third spacer element placed on the image side of the third lens and in contact with the image side of the third lens. Among them, the number of lenses with optical power in the optical imaging lens is seven. The central thickness CT3 of the third lens on the optical axis and the distance EP23 between the second spacer element and the third spacer element along the optical axis satisfy: 1.2 < CT3 / EP23 < 2.45; the curvature radius R6 of the image side of the third lens, the outer diameter D3s of the object side of the third spacer element, and the inner diameter d3s of the object side of the third spacer element satisfy: -5.8 < R6 / (D3s - d3s) < -2.7; the effective focal length f3 of the third lens, the maximum thickness CP2 of the second spacer element, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 5.0 < f3 / (CP2 + T23) < 8.2.

[0005] According to an exemplary embodiment of this application, the lens barrel assembly includes a first lens barrel and a second lens barrel. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are assembled inside the first lens barrel, and the sixth lens and the seventh lens are assembled inside the second lens barrel.

[0006] According to an exemplary embodiment of this application, the curvature radius R5 of the object side of the third lens, the outer diameter D2s of the object side of the second spacer element, the curvature radius R4 of the image side of the second lens, and the inner diameter d2s of the object side of the second spacer element satisfy: 1.8 < (R5 / D2s) / (R4 / d2s) < 2.4.

[0007] According to an exemplary embodiment of the present application, the curvature radius R7 of the object side surface of the fourth lens and the inner diameter d3m of the image side surface of the third spacer element satisfy: 2.24 <R7 / d3m<4.3。

[0008] According to an exemplary embodiment of the present application, the outer diameter D3m of the image side surface of the third spacer element and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.94 <D3m / R8<2.65。

[0009] According to an exemplary embodiment of the present application, the distance EP12 between the first spacer element and the second spacer element along the optical axis and the center thickness CT2 of the second lens on the optical axis meet the following conditions: 2.7 <EP12 / CT2<4.35。

[0010] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element disposed on the image side surface of the first lens and in contact with the image side surface of the first lens; the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 9.0<(f1+f2) / (CP1+T12)<13.2.

[0011] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; a distance EP34 between the third spacer element and the fourth spacer element along the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy: 2.0≤EP34 / CT4<3.8.

[0012] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; the center thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP4 of the fourth spacer element, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 1.95 <CT5 / (CP4+T45)<2.28。

[0013] According to an exemplary embodiment of the present application, the spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; the effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: -9.68<(f6+f7) / (CP6+T67)<-8.21.

[0014] According to an exemplary embodiment of the present application, the spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; a distance EP206 between the object side end surface of the second lens barrel and the sixth spacer element along the optical axis and a center thickness CT6 of the sixth lens on the optical axis satisfy: 3.72 <EP206 / CT6<4.65。

[0015] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element disposed on the image side surface of the first lens and in contact with the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 1.63 <R2 / R3 / (D1s / d1s)<2.15。

[0016] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; the curvature radius R9 of the object side surface of the fifth lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfy: 3.95 <R9 / (D4m-d4m)<10.45。

[0017] According to an exemplary embodiment of the present application, the spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; the curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element satisfy: -1.55 <R13 / d6m<-1.0。

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

[0019] The optical imaging lens provided by this application uses seven lenses. By controlling the optical imaging lens to satisfy "1.2 < CT3 / EP23 < 2.45" and "5.0 < f3 / (CP2 + T23) < 8.2", the edge thickness, center thickness, and effective focal length of the third lens can be constrained within a reasonable range, making the contour of the third lens more reasonable, which is beneficial to the molding of the third lens. At the same time, by restricting the maximum thickness of the second spacer element, the assembly stability of the third lens is effectively improved. However, in this case, internal reflection stray light is likely to occur in the third lens. Therefore, by controlling the optical imaging lens to satisfy "-5.8 < R6 / (D3s - d3s) < -2.7", the bandwidth of the object side of the third spacer element (i.e., the light-shielding area on the image side of the third lens) can be controlled by the inner and outer diameters of the object side of the third spacer element, so that the internal reflection stray light of the third lens does not exit from the non-effective diameter area of the third lens, and the exit height of the light exiting from the image side of the third lens is appropriate, ensuring the overall image height of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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. In the drawings:

[0021] Figure 1 A parameter annotation diagram of the optical imaging lens according to this application is shown;

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

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

[0024] Figure 4 and Figure 5 and Figure 6 and Figure 7 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 1 or 2 of this application;

[0025] Figure 8 A schematic structural diagram of the optical imaging lens according to Embodiment 3 of this application is shown;

[0026] Figure 9 A schematic structural diagram of the optical imaging lens according to Embodiment 4 of this application is shown;

[0027] Figure 10 and Figure 11 and Figure 12 and Figure 13axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Example 3 or 4 of the present application are respectively shown;

[0028] Figure 14 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0029] Figure 15 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0030] Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Example 5 or 6 of the present application are respectively shown;

[0031] Figure 20 1 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0032] Figure 21 1 shows a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

[0033] Figure 22 、 Figure 23 、 Figure 24 、 Figure 25 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to Example 7 or 8 of the present application are respectively shown;

[0034] Figure 26 and Figure 27 The spot diagram and optical path diagram are shown respectively when the optical imaging lens satisfies CT3 / EP23=2.24, R6 / (D3s-d3s)=-6.2, and f3 / (CP2+T23)=6.73;

[0035] Figure 28 and Figure 29 The spot diagram and optical path diagram are shown respectively when the optical imaging lens satisfies CT3 / EP23=2.24, R6 / (D3s-d3s)=-2.52, and f3 / (CP2+T23)=6.73;

[0036] Figure 30 The light spot diagram when the optical imaging lens satisfies CT3 / EP23=2.24, R6 / (D3s-d3s)=-3.10 and f3 / (CP2+T23)=6.73 is shown. DETAILED DESCRIPTION

[0037] In order to better understand the present application, various aspects of the present application are described in detail 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 are not intended to limit the scope of the present application in any way.

[0038] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0039] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0040] The optical imaging lens of the exemplary embodiments of the present application can be simulated using software and / or tools such as ZEMAX and CODEV. Alternatively, the optical imaging lens can be simulated using CODEV software. During simulation using such software and / or tools, the surface profile of each lens can be appropriately adjusted based on the surface profile model provided by the software and / or tool.

[0041] It should also be understood that the terms "include," "comprising," "having," "including," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. It should be noted that in this specification, the terms "first," "second," "third," and so on, are used only to distinguish one feature from another, and do not represent any limitation on the features.

[0042] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Terms should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0043] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] The features, principles and other aspects of the present application are described in detail below.

[0045] Figure 1 : is a parameter-labeled diagram according to an exemplary embodiment of the present application. Figure 1 , d1s represents the inner diameter of the object side surface of the first spacer element, D1s represents the outer diameter of the object side surface of the first spacer element, d2s represents the inner diameter of the object side surface of the second spacer element, D2s represents the outer diameter of the object side surface of the second spacer element, d3s represents the inner diameter of the object side surface of the third spacer element, D3s represents the outer diameter of the object side surface of the third spacer element, D3m represents the outer diameter of the image side surface of the third spacer element, d4m represents the inner diameter of the image side surface of the fourth spacer element, D4m represents the outer diameter of the image side surface of the fourth spacer element, d6m represents the inner diameter of the image side surface of the sixth spacer element, CP1 represents the maximum thickness of the first spacer element, CP2 represents the maximum thickness of the second spacer element, CP3 represents the maximum thickness of the third spacer element, EP12 represents the distance between the first spacer element and the second spacer element along the optical axis, EP23 represents the distance between the second spacer element and the third spacer element along the optical axis, EP34 represents the distance between the third spacer element and the fourth spacer element along the optical axis, and EP206 represents the distance between the object side end surface of the second lens barrel and the sixth spacer element along the optical axis.

[0046] refer to Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 、 Figure 14 、 Figure 15 、 Figure 20 and Figure 21 In a first aspect, the present application provides an optical imaging lens. The optical imaging lens may include an optical lens assembly. The optical lens assembly may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, arranged in order from the object side to the image side along the optical axis. Among the first to seventh lenses, any two adjacent lenses may have an air space between them.

[0047] In an exemplary embodiment, the first lens may have positive optical power. The second lens may have negative optical power. The third lens may have positive optical power. The fourth lens may have positive optical power. The fifth lens may have negative optical power. The sixth lens may have positive optical power. The seventh lens may have negative optical power.

[0048] In an exemplary embodiment, the object-side surface of the first lens may be convex, and the image-side surface may be concave.

[0049] In an exemplary embodiment, the object-side surface of the second lens may be convex, and the image-side surface may be concave.

[0050] In exemplary embodiments, the object-side surface of the third lens may be convex, and the image-side surface may be convex.

[0051] In example embodiments, the object-side surface of the fourth lens may be convex, and the image-side surface may be concave.

[0052] In example embodiments, the object-side surface of the fifth lens may be a convex surface, and the image-side surface may be a convex surface.

[0053] In example embodiments, the object-side surface of the sixth lens may be concave, and the image-side surface may be convex.

[0054] In example embodiments, the object-side surface of the seventh lens may be concave, and the image-side surface may be concave.

[0055] In an exemplary embodiment, the number of lenses having optical power of the optical imaging lens may be seven.

[0056] In an exemplary embodiment, the optical imaging lens may further include a stop, and the stop may be disposed between the first lens and the second lens.

[0057] In an exemplary embodiment, the first through fifth lenses constitute a first lens group, and the position of the first lens group relative to the image plane on the image side is fixed. The sixth and seventh lenses constitute a second lens group, and the second lens group is movable along the optical axis relative to the first lens group, i.e., the distance of the second lens group relative to the first lens group on the optical axis is adjustable. As the distance between the subject and the optical imaging lens decreases from far to near, the optical imaging lens can be adjusted by adjusting the distance on the optical axis between the second lens group and the first lens group.

[0058] In an exemplary embodiment, the optical imaging lens may further include a lens barrel assembly, which may include a first lens barrel and a second lens barrel arranged in sequence along the optical axis from the object side to the image side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens may be assembled within the first lens barrel. The sixth lens and the seventh lens may be assembled within the second lens barrel. Accordingly, the first lens barrel is a fixed assembly whose position relative to the image plane is fixed; the second lens barrel is a movable assembly that can move with the movement of the second lens group during the focusing process of the optical imaging lens.

[0059] In an exemplary embodiment, the optical imaging lens may further include a spacer element group, which may include one or more of a first spacer element, a second spacer element, a third spacer element, a fourth spacer element, and a sixth spacer element. For example, the first spacer element, the second spacer element, the third spacer element, or the fourth spacer element may be placed within the first lens barrel. For example, the sixth spacer element may be placed within the second lens barrel. Proper use of spacers can effectively mitigate stray light risks, reduce image quality interference, and thereby improve the imaging quality of the optical imaging lens.

[0060] In an exemplary embodiment, the outer peripheral surface of at least one lens in the optical lens assembly may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens may be smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of a lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens. For example, the outer diameter of the object-side surface of a lens refers to the outer diameter of the portion of the non-trimmed portion of the lens closest to the object side, and the outer diameter of the image-side surface of a lens refers to the outer diameter of the portion of the non-trimmed portion of the lens closest to the image side.

[0061] In an exemplary embodiment, the outer circumference of at least one spacer element in the spacer element group may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the spacer element may be smaller than the outer diameter of the non-trimmed portion of the spacer element. When the outer circumference of the spacer element has a trimmed portion, the outer diameter of the spacer element generally refers to the outer diameter of the non-trimmed portion of the spacer element. For example, the outer diameter of the object-side surface of the spacer element refers to the outer diameter of the portion of the non-trimmed portion of the spacer element closest to the object side, while the outer diameter of the image-side surface of the spacer element refers to the outer diameter of the portion of the non-trimmed portion of the spacer element closest to the image side.

[0062] In an exemplary embodiment, the spacer element group may include a second spacer element disposed on the image side of the second lens and in contact with the image side of the second lens, and a third spacer element disposed on the image side of the third lens and in contact with the image side of the third lens. The central thickness CT3 of the third lens on the optical axis and the distance EP23 of the second spacer element and the third spacer element along the optical axis satisfy: 1.2 < CT3 / EP23 < 2.45; the radius of curvature R6 of the image side of the third lens, the outer diameter D3s of the object side of the third spacer element and the inner diameter d3s of the object side of the third spacer element satisfy: -5.8 < R6 / (D3s - d3s) < -2.7; the effective focal length f3 of the third lens, the maximum thickness CP2 of the second spacer element and the air gap T23 between the second lens and the third lens on the optical axis satisfy: 5.0 < f3 / (CP2 + T23) < 8.2. By controlling the optical imaging lens to satisfy "1.2 < CT3 / EP23 < 2.45" and "5.0 < f3 / (CP2 + T23) < 8.2", the edge thickness, central thickness and effective focal length of the third lens can be constrained within a reasonable range, making the profile of the third lens more reasonable, which is beneficial to the molding of the third lens. At the same time, by cooperating with restricting the maximum thickness of the second spacer element, the assembly stability of the third lens can be effectively improved. However, in this case, internal stray light is likely to occur in the third lens. Therefore, by controlling the optical imaging lens to satisfy "-5.8 < R6 / (D3s - d3s) < -2.7", the bandwidth of the object side of the third spacer element (i.e., the shading area of the image side of the third lens) can be controlled by the inner and outer diameters of the object side of the third spacer element, so that the internal stray light of the third lens does not exit from the non-effective diameter area of the third lens, and the exit height of the light exiting from the image side of the third lens is appropriate, ensuring the overall image height of the optical imaging lens.

[0063] The imaging effect of the optical imaging lens will be described below in conjunction with Figure 26 , Figure 27 , Figure 28 , Figure 29 and Figure 30 . Among them, Figure 26 and Figure 27 are respectively the stray light simulation diagram and the optical path diagram of the optical imaging lens satisfying CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -6.2 and f3 / (CP2 + T23) = 6.73. Figure 28 and Figure 29 are respectively the stray light simulation diagram and the optical path diagram of the optical imaging lens satisfying CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -z.52 and f3 / (CP2 + T23) = 6.73. Figure 30 It should be noted that there seems to be a typo in the original text where "R6 / (D3s - d3s) = -z.52" should probably be "R6 / (D3s - d3s) = -2.52", and this has been corrected in the translation.The stray light simulation diagram when the optical imaging lens satisfies CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -3.10, and f3 / (CP2 + T23) = 6.73.

[0064] When the optical imaging lens satisfies CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -6.2, and f3 / (CP2 + T23) = 6.73, the bandwidth of the third spacer element is small, and it blocks a small area of the ineffective diameter region on the image side of the third lens, resulting in an increase in stray light of the optical imaging lens (as Figure 26 ). When the optical imaging lens satisfies CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -2.52, and f3 / (CP2 + T23) = 6.73, the third spacer element has a small bandwidth, and it blocks a small area of the ineffective diameter region on the image side of the third lens, resulting in an increase in stray light of the optical imaging lens (as Figure 28 ), and the exit height of the light exiting from the image side of the third lens is unreasonable, making the overall image height of the optical imaging lens small (as Figure 29 ). However, when the optical imaging lens satisfies CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -3.10, and f3 / (CP2 + T23) = 6.73, the bandwidth of the third spacer element is at a reasonable level, and it effectively blocks the ineffective diameter region on the image side of the third lens, and the stray light of the optical imaging lens is significantly reduced (as Figure 30 ). It can be seen that by controlling the optical imaging lens to satisfy "1.2 < CT3 / EP < 2.45", "-5.8 < R6 / (D3s - d3s) < -2.7", and "5.0 < f3 / (CP2 + T23) < 8.2", the stray light can be reduced.

[0065] In an exemplary embodiment, the spacer element group may include a second spacer element disposed on the image side of the second lens and in contact with the image side of the second lens. The radius of curvature R5 of the object side of the third lens, the outer diameter D2s of the object side of the second spacer element, the radius of curvature R4 of the image side of the second lens, and the inner diameter d2s of the object side of the second spacer element satisfy: 1.8 < (R5 / D2s) / (R4 / d2s) < 2.4. Reasonably configuring the relationship among the radius of curvature of the object side of the third lens, the outer diameter of the object side of the second spacer element, the radius of curvature of the image side of the second lens, and the inner diameter of the object side of the second spacer element is beneficial to controlling the bandwidth of the second spacer element, enabling the second spacer element to effectively block the light passing through the non-effective diameter part of the second lens and the light entering from the non-effective diameter part of the third lens, reducing the generation and propagation of stray light, and making the exit height of the light exiting from the image side of the second lens appropriate; at the same time, it can also control the radius of curvature of the image side of the second lens and the radius of curvature of the object side of the third lens, which is beneficial to controlling the transmission direction of the light between the second lens and the third lens, ensuring that the optical imaging lens meets the design requirements such as high-quality imaging.

[0066] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens and in contact with the image side of the third lens. The radius of curvature R7 of the object side of the fourth lens and the inner diameter d3m of the image side of the third spacer element satisfy: 2.24 < R7 / d3m < 4.3. Reasonably configuring the ratio of the radius of curvature of the object side of the fourth lens to the inner diameter of the image side of the third spacer element can effectively control the incident height of the light on the object side of the fourth lens and control the transmission direction of the light within the fourth lens.

[0067] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens and in contact with the image side of the third lens. The outer diameter D3m of the image side of the third spacer element and the radius of curvature R8 of the image side of the fourth lens satisfy: 1.94 < D3m / R8 < 2.65. Reasonably configuring the ratio of the outer diameter of the image side of the third spacer element to the radius of curvature of the image side of the fourth lens can confine the outer diameter of the non-effective diameter part of the object side of the fourth lens within a certain range, which is beneficial to the shaping of the fourth lens and is also beneficial to improving the assembly stability of the optical imaging lens. <000019In an exemplary embodiment, the spacer element group may include a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens, and a second spacer element disposed on the image side of the second lens and in contact with the image side of the second lens. The distance EP12 between the first spacer element and the second spacer element along the optical axis and the central thickness CT2 of the second lens on the optical axis satisfy: 2.7 < EP12 / CT2 < 4.35. By constraining the range of the ratio of the distance between the first spacer element and the second spacer element along the optical axis to the central thickness of the second lens on the optical axis, it is beneficial to control the shape of the second lens, ensure that the edge thickness and the central thickness of the second lens meet the molding requirements of the lens, and is beneficial to the ratio of the edge thickness to the central thickness of the second lens to meet the design requirements.

[0069] In an exemplary embodiment, the spacer element group may include a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 9.0 < (f1 + f2) / (CP1 + T12) < 13.2. By constraining the range of the above conditional formula, the effective focal lengths of the first lens and the second lens can be controlled within a reasonable range, thereby controlling the shapes of the first lens and the second lens. At the same time, when the air gap between the first lens and the second lens on the optical axis is fixed, the shape and thickness of the first spacer element can be indirectly constrained by the effective focal lengths of the first lens and the second lens.

[0070] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens and in contact with the image side of the third lens, and a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side of the fourth lens. The distance EP34 between the third spacer element and the fourth spacer element along the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy: 2.0 ≤ EP34 / CT4 < 3.8. By reasonably configuring the ratio of the distance between the third spacer element and the fourth spacer element along the optical axis to the central thickness of the fourth lens on the optical axis, the central thickness and the edge thickness of the fourth lens can be respectively constrained within a certain range, restricting the shape of the fourth lens, and reducing the generation and propagation of stray light in the edge region of the fourth lens, reducing the stray light of the optical imaging lens, and improving the imaging quality of the optical imaging lens.

[0071] In an exemplary embodiment, the spacer element group may include a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens. The central thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP4 of the fourth spacer element, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 1.95 < CT5 / (CP4 + T45) < 2.28. By constraining the above conditional expression within a certain range, the air gap between the fourth lens and the fifth lens and the maximum thickness of the fourth spacer element can be respectively constrained within a certain range, restricting the shapes of the image side surface of the fourth lens and the object side surface of the fifth lens, reducing the stray light between the fourth lens and the fifth lens, and thus improving the imaging quality of the optical imaging lens.

[0072] In an exemplary embodiment, the spacer element group may include a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens. The effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: -9.68 < (f6 + f7) / (CP6 + T67) < -8.21. An overly large air gap between the sixth lens and the seventh lens will affect the assembly stability of the optical imaging lens. Therefore, by controlling (f6 + f7) / (CP6 + T67) to be within the range of -9.68 to -8.21, the shapes of the sixth lens and the seventh lens can be constrained, such that there is a reasonable air gap between the sixth lens and the seventh lens, and the maximum thickness of the sixth spacer element within this air gap is reasonable, improving the assembly stability of the sixth lens and the seventh lens.

[0073] In an exemplary embodiment, the spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens. The distance EP206 along the optical axis between the object side end face of the second lens barrel and the sixth spacer element and the central thickness CT6 of the sixth lens on the optical axis satisfy: 3.72 < EP206 / CT6 < 4.65. By reasonably configuring the ratio of the distance along the optical axis between the object side end face of the second lens barrel and the sixth spacer element to the central thickness of the sixth lens on the optical axis, the edge thickness and central thickness of the sixth lens can be constrained, such that the sixth lens has a suitable thickness ratio and curvature, which is beneficial for correcting the astigmatism of the optical imaging lens, and at the same time, the assembly stability of the sixth lens within the second lens barrel can also be improved.

[0074] In an exemplary embodiment, the spacer element group may include a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens. The radius of curvature R2 of the image side of the first lens, the radius of curvature R3 of the object side of the second lens, the outer diameter D1s of the object side of the first spacer element, and the inner diameter d1s of the object side of the first spacer element satisfy: 1.63 < R2 / R3 / (D1s / d1s) < 2.15. By constraining the above conditional formula within a certain range, the bandwidth of the first spacer element can be controlled within a certain range, so that the first spacer element can effectively block the light passing through the non-effective diameter part of the first lens and the light entering from the non-effective diameter part of the second lens, reduce the generation and propagation of stray light, and at the same time is also conducive to controlling the transmission direction of light between the first lens and the second lens, ensuring that the optical imaging lens meets the design requirements and achieving high-quality imaging.

[0075] In an exemplary embodiment, the spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side of the fourth lens. The radius of curvature R9 of the object side of the fifth lens, the outer diameter D4m of the image side of the fourth spacer element, and the inner diameter d4m of the image side of the fourth spacer element satisfy: 3.95 < R9 / (D4m - d4m) < 10.45. By constraining the above conditional formula within a certain range, the bandwidth of the fourth spacer element can be controlled within a certain range, so that the fourth spacer element effectively blocks the non-effective diameter part of the object side of the fifth lens, minimizes the emission of stray light from the non-effective diameter part of the object side of the fifth lens, and at the same time can also control the incident height and transmission state of the effective light on the object side of the fifth lens, ensuring the complete transmission of the effective light and improving the imaging quality of the optical imaging lens.

[0076] In an exemplary embodiment, the spacer element group further includes a sixth spacer element disposed on the image side of the sixth lens and in contact with the image side of the sixth lens. The radius of curvature R13 of the object side of the seventh lens and the inner diameter d6m of the image side of the sixth spacer element satisfy: -1.55 < R13 / d6m < -1.0. Reasonably configuring the ratio of the radius of curvature of the object side of the seventh lens to the inner diameter of the image side of the sixth spacer element is conducive to controlling the incident height of light on the object side of the seventh lens and controlling the propagation direction of light in the seventh lens, thereby well controlling the overall image plane height of the optical imaging lens; at the same time, it can also avoid the generation of light leakage and ensure the illuminance of the optical imaging lens.

[0077] A second aspect of the present application provides an optical imaging lens. The optical imaging lens may include a lens barrel assembly, a spacer element group disposed within the lens barrel assembly, and an optical lens group. The optical 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, arranged in sequence along the optical axis from the object side to the image side. The spacer element group may include a sixth spacer element disposed on and in contact with the image side surface of the sixth lens.

[0078] The effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air spacing T67 between the sixth and seventh lenses on the optical axis satisfy the following conditions: -9.68 < (f6 + f7) / (CP6 + T67) < -8.21. An excessively large air spacing between the sixth and seventh lenses can affect the assembly stability of the optical imaging lens. Therefore, by controlling (f6 + f7) / (CP6 + T67) within the range of -9.68 to -8.21, the shapes of the sixth and seventh lenses can be constrained, ensuring a reasonable air spacing between the sixth and seventh lenses and a reasonable maximum thickness of the sixth spacer element within this air spacing, thereby improving the assembly stability of the sixth and seventh lenses.

[0079] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical system can be changed to obtain the various results and advantages described in this specification.

[0080] Specific embodiments of the optical system applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0081] Example 1

[0082] The following reference Figure 2 The optical imaging lens according to Example 1 of the present application is described.

[0083] like Figure 2 As shown, the optical imaging lens includes a lens barrel assembly, a spacer element group, and an optical lens group. The lens barrel assembly includes a first lens barrel P10 and a second lens barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second lens barrel P20.

[0084] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. In this example, an optical element, such as a filter, may be further provided on the image side of the seventh lens E7. The optical element may have an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0085] The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6. The spacers can block excess light from entering the next lens during the imaging process, while also improving the support between the lens and the lens barrel, thereby enhancing the structural stability of the optical imaging lens.

[0086] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0087]

[0088] Table 1

[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 both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0090]

[0091] Where x is the distance vector from the vertex of the aspheric surface 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 radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient for the i-th order of the aspheric surface. Table 2 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric surface S1 to S14 in Example 1.

[0092]

[0093]

[0094] Table 2

[0095] Example 2

[0096] The following is based on Figure 3 The optical imaging lens according to Example 2 of the present application is described.

[0097] like Figure 3 As shown, the optical imaging lens includes a barrel assembly, a spacer element group, and an optical lens group. The barrel assembly includes a first barrel P10 and a second barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second barrel P20. The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6.

[0098] The structure of the optical lens assembly of this embodiment is the same as that of Example 1. That is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. This embodiment differs from Example 1 in that the structure and dimensions of at least some of the elements in the lens barrel assembly and the spacer element group are different.

[0099] Figure 4 The axial chromatic aberration curve of the optical imaging lens of Example 1 or 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 5 The astigmatism curve of the optical imaging lens of Example 1 or 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 6 The distortion curve of the optical imaging lens of Example 1 or 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 7 The chromatic aberration curve of the optical imaging lens of Example 1 or 2 is shown, which represents the aberration of different image heights on the imaging surface after the light passes through the lens. Figures 4 to 7 It can be seen that the optical imaging lens of Example 1 or 2 can achieve good imaging quality.

[0100] Example 3

[0101] The following reference Figure 8The optical imaging lens according to Example 3 of the present application is described.

[0102] like Figure 8 As shown, the optical imaging lens includes a lens barrel assembly, a spacer element group, and an optical lens group. The lens barrel assembly includes a first lens barrel P10 and a second lens barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second lens barrel P20.

[0103] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. In this example, an optical element, such as a filter, may be further provided on the image side of the seventh lens E7. The optical element may have an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0104] The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6. The spacers can block excess light from entering the next lens during the imaging process, while also improving the support between the lens and the lens barrel, thereby enhancing the structural stability of the optical imaging lens.

[0105] Table 3 shows the basic parameters of the optical imaging lens of Example 3, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0106]

[0107] Table 3

[0108] In this embodiment, both the object-side surface and the image-side surface of each of the first lens element E1 through the seventh lens element E7 are aspherical surfaces. Table 4 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical mirror surfaces S1 through S14 that can be used in Example 3.

[0109]

[0110]

[0111] Table 4

[0112] Example 4

[0113] The following is based on Figure 9 An optical imaging lens according to Example 4 of the present application is described.

[0114] like Figure 9 As shown, the optical imaging lens includes a barrel assembly, a spacer element group, and an optical lens group. The barrel assembly includes a first barrel P10 and a second barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second barrel P20. The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6.

[0115] The structure of the optical lens assembly of this embodiment is identical to that of Example 3. Specifically, the basic parameter table of the optical imaging lens of this embodiment is identical to Table 3, and the aspheric coefficient table is identical to Table 4. This embodiment differs from Example 3 in that the structure and dimensions of at least some of the elements in the lens barrel assembly and the spacer element assembly are different.

[0116] Figure 10 The axial chromatic aberration curve of the optical imaging lens of Example 3 or 4 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 11 The astigmatism curve of the optical imaging lens of Example 3 or 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 12 The distortion curve of the optical imaging lens of Example 3 or 4 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 13The chromatic aberration curve of the optical imaging lens of Example 3 or 4 is shown, which represents the aberration of different image heights on the imaging surface after the light passes through the lens. Figures 10 to 13 It can be seen that the optical imaging lens of Example 3 or 4 can achieve good imaging quality.

[0117] Example 5

[0118] The following reference Figure 14 The optical imaging lens according to Example 5 of the present application is described.

[0119] like Figure 14 As shown, the optical imaging lens includes a lens barrel assembly, a spacer element group, and an optical lens group. The lens barrel assembly includes a first lens barrel P10 and a second lens barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second lens barrel P20.

[0120] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. In this example, an optical element, such as a filter, may be further provided on the image side of the seventh lens E7. The optical element may have an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0121] The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6. The spacers can block excess light from entering the next lens during the imaging process, while also improving the support between the lens and the lens barrel, thereby enhancing the structural stability of the optical imaging lens.

[0122] Table 5 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius and thickness / distance are all millimeters (mm).

[0123]

[0124]

[0125] Table 5

[0126] In this embodiment, both the object-side and image-side surfaces of each of the first lens element E1 through the seventh lens element E7 are aspherical surfaces. Table 6 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S1 through S14 that can be used in Example 5.

[0127] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.7968E-01 -3.2518E-02 3.5207E-03 6.5507E-04 5.4262E-04 -4.3908E-04 -8.4764E-06 S2 -4.3054E-02 -4.1156E-02 1.1119E-02 -2.6644E-03 1.9193E-03 -1.2866E-03 4.4943E-04 S3 -3.0616E-01 2.9218E-02 -6.8570E-03 -1.6206E-03 1.8878E-03 -1.4092E-03 6.0867E-04 S4 -4.9388E-01 6.4581E-02 -1.1413E-02 6.8816E-04 2.1630E-04 -4.5870E-04 1.8989E-04 S5 9.7792E-03 -8.9817E-03 4.8705E-03 -6.2191E-04 -1.1807E-03 7.3217E-05 4.1184E-05 S6 9.0018E-01 -2.0692E-01 4.2036E-02 -1.0652E-02 4.1583E-04 5.0955E-05 5.6144E-04 S7 4.6909E-02 -4.1860E-02 2.3264E-02 -8.0868E-04 -4.2256E-03 2.2472E-03 4.7112E-04 S8 -1.6865E+00 1.1368E-01 -3.3853E-02 9.0375E-03 -9.6219E-03 3.3442E-03 1.8017E-04 S9 -7.6962E-01 -1.1466E-02 3.7956E-03 1.8715E-03 -2.5746E-03 1.7536E-03 1.2921E-03 S10 -1.3740E-01 -2.7257E-02 6.8140E-03 1.6620E-03 1.2795E-03 1.0511E-03 1.0267E-03 S11 7.1464E-01 -5.9219E-02 4.2541E-03 -3.1284E-03 3.3752E-04 -6.7136E-05 1.0534E-04 S12 8.1678E-01 -4.4435E-02 2.7875E-03 -3.1662E-03 -5.0038E-04 1.1246E-04 3.8440E-05 S13 -1.2888E+00 3.4125E-01 -3.9005E-02 2.8149E-02 -9.5168E-03 2.8275E-03 -2.0222E-03 S14 -2.5918E+00 4.2921E-01 -1.4822E-01 5.5465E-02 -2.2473E-02 1.0672E-02 -4.8787E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.2183E-04 2.4239E-05 -2.4972E-05 8.2323E-06 2.2112E-07 0.0000E+00 0.0000E+00 S2 -3.1603E-04 8.3217E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -4.1388E-04 1.3629E-04 -1.0057E-05 -2.0769E-06 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.1881E-04 6.5447E-05 1.0081E-05 -5.1282E-06 1.3894E-06 0.0000E+00 0.0000E+00 S5 -2.1466E-04 2.9170E-05 3.9492E-05 -2.2398E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -7.6340E-04 2.3960E-04 5.8005E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -6.3408E-04 6.2894E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 -2.6470E-04 -2.4550E-04 -2.3322E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -8.4382E-05 -3.5121E-04 1.6118E-05 -3.5272E-05 9.8831E-06 8.5638E-08 0.0000E+00 S10 -2.1291E-04 -2.6094E-05 -1.7494E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S11 -2.3496E-04 9.1718E-05 5.2054E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S12 -4.2680E-05 -1.1028E-07 5.0606E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S13 6.3690E-04 -3.0882E-04 1.0826E-04 -1.2104E-04 9.1436E-05 -4.6955E-05 -1.0306E-05 S14 2.4101E-03 -1.1593E-03 5.1799E-04 -2.8974E-04 1.6440E-04 -8.7994E-05 5.8245E-05

[0128] Table 6

[0129] Example 6

[0130] The following is based on Figure 15 The optical imaging lens according to Example 6 of the present application is described.

[0131] like Figure 15 As shown, the optical imaging lens includes a barrel assembly, a spacer element group, and an optical lens group. The barrel assembly includes a first barrel P10 and a second barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second barrel P20. The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6.

[0132] The structure of the optical lens assembly of this embodiment is identical to that of Example 5. Specifically, the basic parameter table of the optical imaging lens of this embodiment is identical to Table 5, and the aspheric coefficient table is identical to Table 6. This embodiment differs from Example 5 in that the structure and dimensions of at least some of the elements in the lens barrel assembly and the spacer element assembly are different.

[0133] Figure 16The axial chromatic aberration curve of the optical imaging lens of Example 5 or 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 17 The astigmatism curve of the optical imaging lens of Example 5 or 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 18 The distortion curve of the optical imaging lens of Example 5 or 6 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 19 The chromatic aberration curve of the optical imaging lens of Example 5 or 6 is shown, which represents the aberration of different image heights on the imaging surface after the light passes through the lens. Figures 16 to 19 It can be seen that the optical imaging lens of Example 5 or 6 can achieve good imaging quality.

[0134] Example 7

[0135] The following reference Figure 20 An optical imaging lens according to Example 7 of the present application is described.

[0136] like Figure 20 As shown, the optical imaging lens includes a lens barrel assembly, a spacer element group, and an optical lens group. The lens barrel assembly includes a first lens barrel P10 and a second lens barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second lens barrel P20.

[0137] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. In this example, an optical element, such as a filter, may be further provided on the image side of the seventh lens E7. The optical element may have an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0138] The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6. The spacers can block excess light from entering the next lens during the imaging process, while also improving the support between the lens and the lens barrel, thereby enhancing the structural stability of the optical imaging lens.

[0139] Table 7 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius and thickness / distance are all millimeters (mm).

[0140]

[0141]

[0142] Table 7

[0143] In this embodiment, both the object-side surface and the image-side surface of each of the first lens element E1 through the seventh lens element E7 are aspherical surfaces. Table 8 lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S1 through S14 that can be used in Example 7.

[0144]

[0145]

[0146] Table 8

[0147] Example 8

[0148] The following is based on Figure 21 The optical imaging lens according to Example 8 of the present application is described.

[0149] like Figure 21 As shown, the optical imaging lens includes a barrel assembly, a spacer element group, and an optical lens group. The barrel assembly includes a first barrel P10 and a second barrel P20. The optical lens group includes a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7, arranged in sequence along the optical axis from the object side to the image side. A stop STO (not shown) can be disposed between the first lens E1 and the second lens E2. The first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are disposed in the first barrel P10, and the sixth lens E6 and the seventh lens E7 are disposed in the second barrel P20. The spacer element group may include a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a sixth spacer element P6.

[0150] The structure of the optical lens assembly of this embodiment is identical to that of Example 7. Specifically, the basic parameter table of the optical imaging lens of this embodiment is identical to Table 7, and the aspheric coefficient table is identical to Table 8. This embodiment differs from Example 7 in that the structure and dimensions of at least some of the elements in the lens barrel assembly and the spacer element assembly are different.

[0151] Figure 22 The axial chromatic aberration curve of the optical imaging lens of Example 7 or 8 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 23 The astigmatism curve of the optical imaging lens of Example 7 or 8 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 24 The distortion curve of the optical imaging lens of Example 7 or 8 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 25 The chromatic aberration curve of the optical imaging lens of Example 7 or 8 is shown, which represents the aberration of different image heights on the imaging surface after the light passes through the lens. Figures 22 to 25 It can be seen that the optical imaging lens of Example 7 or 8 can achieve good imaging quality.

[0152] Table 9 gives the values ​​of the f1, f2, f3, f4, f5, f6, and f7 parameters of each embodiment in Examples 1-8.

[0153] Parameters / Example 1 2 3 4 5 6 7 8 f1(mm) 12.36 12.36 12.52 12.52 12.10 12.10 10.96 10.96 f2(mm) -10.17 -10.17 -10.19 -10.19 -9.60 -9.60 -8.90 -8.90 f3(mm) 5.74 5.74 5.89 5.89 5.91 5.91 5.70 5.70 f4(mm) -6.25 -6.25 -6.65 -6.65 -6.99 -6.99 -6.49 -6.49 f5(mm) 5.85 5.85 5.94 5.94 5.99 5.99 5.92 5.92 f6(mm) -25.39 -25.39 -25.21 -25.21 -24.16 -24.16 -24.77 -24.77 f7(mm) -8.28 -8.28 -8.20 -8.20 -7.88 -7.88 -7.91 -7.91

[0154] Table 9

[0155] Table 10 shows the values ​​of the parameters d1s, D1s, d2s, D2s, d3s, d3m, D3s, D3m, d4m, D4m, d6m, CP1, CP2, CP4, CP6, EP12, EP23, EP34 and EP206 in each of Examples 1-8. Figure 1 Measured using the marking method shown.

[0156]

[0157]

[0158] Table 10

[0159] Table 11 shows the values ​​of the conditional expressions of each of Examples 1 to 8.

[0160] Conditional formula / Example 1 2 3 4 5 6 7 8 EP12 / CT2 4.31 4.04 3.95 3.64 3.95 3.12 3.72 2.71 (f1+f2) / (CP1+T12) 9.03 9.11 9.20 9.27 13.01 13.14 12.22 12.22 f3 / (CP2+T23) 6.73 6.75 5.03 7.07 8.19 5.92 7.92 5.31 CT3 / EP23 2.24 1.30 2.33 1.25 2.22 2.11 2.40 2.28 EP34 / CT4 3.76 3.42 3.43 3.43 2.00 2.00 2.01 2.01 CT5 / (CP4+T45) 2.23 2.23 2.02 2.02 1.98 1.98 1.96 1.97 (f6+f7) / (CP6+T67) -9.62 -9.63 -9.61 -9.62 -9.21 -8.26 -9.51 -9.51 EP206 / CT6 4.06 4.06 4.06 3.77 3.94 4.64 3.84 3.84 R2 / R3 / (D1s / d1s) 1.71 1.75 1.70 1.68 1.92 1.95 2.11 2.08 (R5 / D2s) / (R4 / d2s) 2.14 2.10 2.35 2.07 1.84 2.18 1.75 1.92 R6 / (D3s-d3s) -3.10 -2.88 -2.83 -5.51 -5.77 -2.91 -2.74 -2.74 R7 / d3m 2.56 2.56 2.29 2.29 3.71 3.71 4.29 4.29 D3m / R8 2.60 2.63 2.57 2.28 1.99 2.25 2.35 2.35 R9 / (D4m-d4m) 4.35 4.11 4.16 3.97 4.27 10.44 5.41 5.39 R13 / d6m -1.02 -1.02 -1.11 -1.13 -1.51 -1.18 -1.31 -1.31

[0161] Table 11

[0162] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of application involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: include: an optical lens group, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in order from the object side to the image side along the optical axis; a spacer element group, comprising a second spacer element disposed on and in contact with the image side surface of the second lens, and a third spacer element disposed on and in contact with the image side surface of the third lens; as well as a lens barrel assembly, wherein the optical lens group and the spacer element group are placed in the lens barrel assembly; The optical imaging lens has seven lenses with optical power. The central thickness CT3 of the third lens on the optical axis and the distance EP23 between the second spacer element and the third spacer element along the optical axis satisfy the following conditions: 1.2 <CT3 / EP23<2.45; The curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacer element, and the inner diameter d3s of the object side surface of the third spacer element satisfy: -5.8 <R6 / (D3s-d3s)<-2.7; The effective focal length f3 of the third lens, the maximum thickness CP2 of the second spacer element, and the air distance T23 between the second lens and the third lens on the optical axis satisfy the following conditions: 5.0 <f3 / (CP2+T23)<8.2。 2. The optical imaging lens according to claim 1, wherein: The lens barrel assembly includes a first lens barrel and a second lens barrel. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are assembled in the first lens barrel, and the sixth lens and the seventh lens are assembled in the second lens barrel.

3. The optical imaging lens according to claim 1, wherein: The curvature radius R5 of the object side surface of the third lens, the outer diameter D2s of the object side surface of the second spacer element, the curvature radius R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer element satisfy: 1.8<(R5 / D2s) / (R4 / d2s)<2.

4.

4. The optical imaging lens according to claim 1, wherein: The curvature radius R7 of the object side surface of the fourth lens and the inner diameter d3m of the image side surface of the third spacer element satisfy: 2.24 <R7 / d3m<4.3。 5. The optical imaging lens according to claim 1, wherein: The outer diameter D3m of the image side surface of the third spacer element and the curvature radius R8 of the image side surface of the fourth lens satisfy: 1.94 <D3m / R8<2.65。 6. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a first spacer element disposed on the image side surface of the first lens and in contact with the image side surface of the first lens; The distance EP12 between the first spacer element and the second spacer element along the optical axis and the center thickness CT2 of the second lens on the optical axis meet the following conditions: 2.7 <EP12 / CT2<4.35。 7. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a first spacer element disposed on the image side surface of the first lens and in contact with the image side surface of the first lens; The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the maximum thickness CP1 of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy: 9.0<(f1+f2) / (CP1+T12)<13.

2.

8. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; A distance EP34 between the third spacer element and the fourth spacer element along the optical axis and a center thickness CT4 of the fourth lens on the optical axis satisfy the following: 2.0≤EP34 / CT4<3.

8.

9. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; The center thickness CT5 of the fifth lens on the optical axis, the maximum thickness CP4 of the fourth spacer element, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following conditions: 1.95 <CT5 / (CP4+T45)<2.28。 10. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; The effective focal length f6 of the sixth lens, the effective focal length f7 of the seventh lens, the maximum thickness CP6 of the sixth spacer element, and the air gap T67 between the sixth lens and the seventh lens on the optical axis satisfy: -9.68<(f6+f7) / (CP6+T67)<-8.

21.

11. The optical imaging lens according to claim 2, wherein: The spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; The distance EP206 between the object side end surface of the second lens barrel and the sixth spacer element along the optical axis and the center thickness CT6 of the sixth lens on the optical axis meet the following conditions: 3.72 <EP206 / CT6<4.65。 12. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a first spacer element disposed on the image side surface of the first lens and in contact with the image side surface of the first lens; The curvature radius R2 of the image side surface of the first lens, the curvature radius R3 of the object side surface of the second lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 1.63 <R2 / R3 / (D1s / d1s)<2.15。 13. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a fourth spacer element disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens; The curvature radius R9 of the object side surface of the fifth lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfy: 3.95 <R9 / (D4m-d4m)<10.45。 14. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a sixth spacer element disposed on the image side surface of the sixth lens and in contact with the image side surface of the sixth lens; The curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element satisfy: -1.55 <R13 / d6m<-1.0。 15. The optical imaging lens according to any one of claims 1 to 5, wherein: The first lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, its object side surface is convex, and its image side surface is concave; The third lens has positive refractive power, and its object-side surface is convex, and its image-side surface is convex; The fourth lens has positive refractive power, its object-side surface is convex, and its image-side surface is concave; The fifth lens has negative optical power, and its object-side surface is convex, and its image-side surface is convex; The sixth lens has positive refractive power, its object-side surface is concave, and its image-side surface is convex; The seventh lens element has negative optical power, and its object-side surface and image-side surface are concave.

Images