Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel assembly, an optical lens group and a spacer element group arranged in the lens barrel 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 arranged in sequence from an object side to an image side along an optical axis; the spacer element group comprises a second spacer element arranged on an image side of the second lens and a third spacer element arranged on an image side of the third lens; the optical imaging lens satisfies 1.2<CT3 / EP23<2.45, -5.8<R6 / (D3s-d3s)<-2.7 and 5.0<f3 / (CP2+T23)<8.2, CT3 is the central thickness of the third lens on the optical axis, EP23 is the distance of the second spacer element and the third spacer element along the optical axis, R6 is the curvature radius of the image side of the third lens, D3s is the outer diameter of the object side of the third spacer element, d3s is the inner diameter of the object side 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 T23 is the air gap of 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 increasing diversification of 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 nearby, are not properly arranged, there will be较多 stray light in the optical imaging lens, thereby affecting the performance of the optical imaging lens. Summary of the Invention

[0004] This application provides an optical imaging lens, which includes a lens barrel assembly, an optical lens group, and a spacer element group disposed within 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 disposed on and in contact with the image side of the second lens, and a third spacer element disposed on 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 along the optical axis of the second spacer element and the third spacer element 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 the present 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 within the first lens barrel, and the sixth lens and the seventh lens are assembled within the second lens barrel.

[0006] According to an exemplary embodiment of the present 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 this application, the radius of curvature 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 this application, the outer diameter D3m of the image-side surface of the third spacer element and the radius of curvature R8 of the image-side surface of the fourth lens satisfy: 1.94 <D3m / R8<2.65。

[0009] According to an exemplary embodiment of this 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 along the optical axis satisfy: 2.7 <EP12 / CT2<4.35。

[0010] According to an exemplary embodiment of this application, the spacer 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 this application, the spacer group further includes a fourth spacer element disposed on 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 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 this application, the spacer element group further includes a fourth spacer element disposed on 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 and fifth lenses on the optical axis satisfy: 1.95 <CT5 / (CP4+T45)<2.28。

[0013] According to an exemplary embodiment of this application, the spacer element group further includes a sixth spacer element disposed on and in contact with the image side 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 and seventh lenses on the optical axis satisfy: -9.68<(f6+f7) / (CP6+T67)<-8.21.

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

[0015] According to an exemplary embodiment of this application, the spacer element group further includes a first spacer element disposed on and in contact with the image-side surface of the first lens; the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature 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 this application, the spacer element group further includes a fourth spacer element disposed on and in contact with the image-side surface of the fourth lens; the radius of curvature 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 this application, the spacer element group further includes a sixth spacer element disposed on and in contact with the image-side surface of the sixth lens; the radius of curvature 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 this application, a first lens has positive optical power, with its object-side surface being convex and its image-side surface being concave; a second lens has negative optical power, with its object-side surface being convex and its image-side surface being concave; a third lens has positive optical power, with its object-side surface being convex and its image-side surface being convex; a fourth lens has positive optical power, with its object-side surface being convex and its image-side surface being concave; a fifth lens has negative optical power, with its object-side surface being convex and its image-side surface being convex; a sixth lens has positive optical power, with its object-side surface being concave and its image-side surface being convex; and a seventh lens has negative optical power, with its object-side surface being concave and its image-side surface being 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, 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 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-limiting embodiments made with reference to the following drawings. In the drawings:

[0021] Figure 1 Shows a parameter annotation diagram of the optical imaging lens according to this application;

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

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

[0024] Figure 4 、 Figure 5 、 Figure 6 、 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 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of this application;

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

[0027] Figure 10 、 Figure 11 、 Figure 12 、 Figure 13The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 3 or 4 of this application are shown respectively.

[0028] Figure 14 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0029] Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0030] Figure 16 , Figure 17 , Figure 18 , Figure 19 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 5 or 6 of this application are shown respectively.

[0031] Figure 20 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0032] Figure 21 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0033] Figure 22 , Figure 23 , Figure 24 , Figure 25 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiment 7 or 8 of this application are shown respectively.

[0034] Figure 26 and Figure 27 The spot pattern 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 pattern 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 image shows the spot pattern when the optical imaging lens satisfies CT3 / EP23=2.24, R6 / (D3s-d3s)=-3.10 and f3 / (CP2+T23)=6.73. Detailed Implementation

[0037] To better understand this application, various aspects of this application will be described in detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of this application and are not intended to limit the scope of this application in any way.

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

[0039] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity 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 location of the concaveness is not defined, 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 this application can be simulated using software and / or tools such as ZEMAX and CODEV. Optionally, the optical imaging lens can be simulated using CODEV software. During the simulation process using software and / or tools as described above, the surface profile of each lens can be appropriately adjusted according to the built-in surface profile model of the software and / or tool used.

[0041] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprises" as 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. It should be noted that in this specification, the expressions "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features.

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

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0045] Figure 1 This is a parameter annotation diagram according to an exemplary embodiment of this application. Reference Figure 1 d1s represents the inner diameter of the object side of the first spacer element, D1s represents the outer diameter of the object side of the first spacer element, d2s represents the inner diameter of the object side of the second spacer element, D2s represents the outer diameter of the object side of the second spacer element, d3s represents the inner diameter of the object side of the third spacer element, D3s represents the outer diameter of the object side of the third spacer element, D3m represents the outer diameter of the image side of the third spacer element, d4m represents the inner diameter of the image side of the fourth spacer element, D4m represents the outer diameter of the image side of the fourth spacer element, d6m represents the inner diameter of the image side 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 and second spacer elements along the optical axis, EP23 represents the distance between the second and third spacer elements along the optical axis, EP34 represents the distance between the third and fourth spacer elements along the optical axis, and EP206 represents the distance between the object side end face 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 The first aspect of this application provides an optical imaging lens that may include an optical lens group, which 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 sequentially along the optical axis from the object side to the image side. An air gap may exist between any two adjacent lenses in the first to seventh lenses.

[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 can be convex, and the image-side surface can be concave.

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

[0050] In an exemplary embodiment, the object-side surface of the third lens can be convex, and the image-side surface can be convex.

[0051] In an exemplary embodiment, the object-side surface of the fourth lens can be convex, and the image-side surface can be concave.

[0052] In an exemplary embodiment, the object-side surface of the fifth lens can be convex, and the image-side surface can also be convex.

[0053] In an exemplary embodiment, the object-side surface of the sixth lens can be concave, and the image-side surface can be convex.

[0054] In an exemplary embodiment, the object-side surface of the seventh lens can be concave, and the image-side surface can also be concave.

[0055] In an exemplary embodiment, the optical imaging lens may have seven lenses with optical power.

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

[0057] In an exemplary embodiment, the first to 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 relative to the first lens group along the optical axis; that is, the distance of the second lens group relative to the first lens group on the optical axis is adjustable. When the subject moves from far to near the optical imaging lens, adjusting the distance between the second lens group and the first lens group on the optical axis enables focusing of the optical imaging lens.

[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 sequentially along the optical axis from the object side to the image side. A first lens, a second lens, a third lens, a fourth lens, and a fifth lens may be mounted within the first lens barrel. A sixth lens and a seventh lens may be mounted within the second lens barrel. Accordingly, the first lens barrel is a fixed assembly, its position relative to the image plane is fixed; the second lens barrel is a movable assembly, which 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 group of spacers, which may include one or more of a first spacer, a second spacer, a third spacer, a fourth spacer, and a sixth spacer. As an example, the first, second, third, or fourth spacer may be placed within a first lens barrel. As an example, the sixth spacer may be placed within a second lens barrel. Proper use of spacers can effectively mitigate stray light risks, reduce interference with image quality, and thus 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 group may have a tangled portion and a non-tangled portion, and the outer diameter of the tangled portion of the lens may be smaller than the outer diameter of the non-tangled portion. When the outer peripheral surface of the lens has a tangled portion, the outer diameter of the lens generally refers to the outer diameter of the non-tangled portion. For example, the outer diameter of the object-side surface of the lens refers to the outer diameter of the portion of the non-tangled portion of the lens closest to the object side, and the outer diameter of the image-side surface of the lens refers to the outer diameter of the portion of the non-tangled portion of the lens closest to the image side.

[0061] In an exemplary embodiment, the outer peripheral surface of at least one spacer in the spacer group may have a truncated portion and a non-truncated portion, and the outer diameter of the truncated portion of the spacer may be smaller than the outer diameter of the non-truncated portion of the spacer. When the outer peripheral surface of the spacer has a truncated portion, the outer diameter of the spacer typically refers to the outer diameter of the non-truncated portion of the spacer. For example, the outer diameter of the object-side surface of the spacer refers to the outer diameter of the portion of the non-truncated portion of the spacer closest to the object side, and the outer diameter of the image-side surface of the spacer refers to the outer diameter of the portion of the non-truncated portion of the spacer 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 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 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 light-shielding area of the image side of the third lens) can be controlled by the outer and inner 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 when the optical imaging lens satisfies 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 when the optical imaging lens satisfies CT3 / EP23 = 2.24, R6 / (D3s - d3s) = -2.52 and f3 / (CP2 + T23) = 6.73. Figure 30The stray light simulation diagram of the optical imaging lens when 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 non-effective diameter region on the image side of the third lens, resulting in an increase in stray light of the optical imaging lens (as shown in 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 non-effective diameter region on the image side of the third lens, resulting in an increase in stray light of the optical imaging lens (as shown in 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 shown in 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 non-effective diameter region on the image side of the third lens, and the stray light of the optical imaging lens is significantly reduced (as shown in Figure 30 ). It can be seen that by controlling the optical imaging lens to satisfy "1.2 < CT3 / EP23 < 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 between 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 conducive 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 conducive to controlling the transmission direction of 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 light on the object side of the fourth lens and control the transmission direction of 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 constrain the outer diameter of the non-effective diameter part of the object side of the fourth lens within a certain range, which is conducive to the molding of the fourth lens and is also conducive to improving the assembly stability of the optical imaging lens.

[0068] 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, 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 along the optical axis between the first spacer element and the second spacer element 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 along the optical axis between the first spacer element and the second spacer element 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 expression, 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 certain, 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 along the optical axis between the third spacer element and the fourth spacer element 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 along the optical axis between the third spacer element and the fourth spacer element 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, the shape of the fourth lens can be restricted, and the generation and propagation of stray light in the edge region of the fourth lens can be reduced, the stray light of the optical imaging lens can be reduced, and the imaging quality of the optical imaging lens can be improved.

[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 to correcting the astigmatism of the optical imaging lens, and at the same time, the assembly stability of the sixth lens in 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 expression 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, reducing the generation and propagation of stray light. At the same time, it is also beneficial to control 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 expression 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, minimizing the emission of stray light from the non-effective diameter part of the object side of the fifth lens. At the same time, it 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 beneficial to controlling the incident height of light on the object side of the seventh lens and 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 this application provides an optical imaging lens. The optical imaging lens may include a lens barrel assembly and a group of spacers and optical lenses disposed within the lens barrel assembly. 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 sequentially along the optical axis from the object side to the image side. The group of spacers 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 gap T67 between the sixth and seventh lenses on the optical axis satisfy the condition: -9.68 < (f6 + f7) / (CP6 + T67) < -8.21. An excessively large air gap between the sixth and seventh lenses will 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 gap between them and a reasonable maximum thickness of the sixth spacer element within this air gap, thereby improving the assembly stability of the sixth and seventh lenses.

[0079] However, those skilled in the art should understand that, without departing from the technical solutions claimed in this 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-described embodiments are further described below with reference to the accompanying drawings.

[0081] Example 1

[0082] The following is for reference Figure 2 Describes an optical imaging lens according to Embodiment 1 of this application.

[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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within 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, the image-side of the seventh lens E7 may also be provided with an optical element, such as a filter, having an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto 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 spacer elements can block excess light from entering the next lens during the imaging process, while also allowing the lens and lens barrel to better fit together, thus enhancing the structural stability of the optical imaging lens.

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

[0087]

[0088] Table 1

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

[0090]

[0091] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical surface S1 to S14 in Example 1.

[0092]

[0093]

[0094] Table 2

[0095] Example 2

[0096] The following is based on Figure 3 Describes an optical imaging lens according to Embodiment 2 of this application.

[0097] like Figure 3 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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within the second lens 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 group in this embodiment is the same as that of the optical lens group in Embodiment 1. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 1, and the aspherical coefficient table is the same as that in Table 2. The difference between this embodiment and Embodiment 1 is that at least some of the components in the lens barrel assembly and the spacer element group have different structural dimensions.

[0099] Figure 4 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 or 2 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 5 The astigmatism curves of the optical imaging lens of Embodiment 1 or 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 6 The distortion curves of the optical imaging lens of Embodiment 1 or 2 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 7 The magnification chromatic aberration curves of the optical imaging lens of Embodiment 1 or 2 are shown, representing the aberrations at different image heights on the imaging plane after light passes through the lens. According to... Figures 4 to 7 It can be seen that the optical imaging lens of Embodiment 1 or 2 can achieve good imaging quality.

[0100] Example 3

[0101] The following is for reference Figure 8Describes an optical imaging lens according to Embodiment 3 of this application.

[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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within 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, the image-side of the seventh lens E7 may also be provided with an optical element, such as a filter, having an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto 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 spacer elements can block excess light from entering the next lens during the imaging process, while also allowing the lens and lens barrel to better fit together, thus enhancing the structural stability of the optical imaging lens.

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

[0106]

[0107] Table 3

[0108] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the seventh lens E7, are aspherical. Table 4 lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspherical mirrors S1 to S14 in Embodiment 3.

[0109]

[0110]

[0111] Table 4

[0112] Example 4

[0113] The following is based on Figure 9 The optical imaging lens according to Embodiment 4 of this application is described.

[0114] like Figure 9 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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within the second lens 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 group in this embodiment is the same as that of the optical lens group in Embodiment 3. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 3, and the aspherical coefficient table is the same as that in Table 4. The difference between this embodiment and Embodiment 3 is that at least some of the components in the lens barrel assembly and the spacer element group have different structural dimensions.

[0116] Figure 10 The on-axis chromatic aberration curves of the optical imaging lens of Embodiment 3 or 4 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 11 The astigmatism curves of the optical imaging lens of Embodiment 3 or 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 12 The distortion curves of the optical imaging lens of Embodiment 3 or 4 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 13The magnification chromatic aberration curves of the optical imaging lenses of Embodiment 3 or 4 are shown, representing the aberrations at different image heights on the imaging plane after light passes through the lens. According to... Figures 10 to 13 It can be seen that the optical imaging lens of Embodiment 3 or 4 can achieve good imaging quality.

[0117] Example 5

[0118] The following is for reference Figure 14 Describes an optical imaging lens according to Embodiment 5 of this application.

[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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within 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, the image-side of the seventh lens E7 may also be provided with an optical element, such as a filter, having an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto 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 spacer elements can block excess light from entering the next lens during the imaging process, while also allowing the lens and lens barrel to better fit together, thus 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 for radius of curvature and thickness / distance are millimeters (mm).

[0123]

[0124]

[0125] Table 5

[0126] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the seventh lens E7, are aspherical. Table 6 lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each of the aspherical surfaces S1 to S14 in Embodiment 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 Describes an optical imaging lens according to Embodiment 6 of this application.

[0131] like Figure 15 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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within the second lens 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 group in this embodiment is the same as that of the optical lens group in Embodiment 5. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 5, and the aspherical coefficient table is the same as that in Table 6. The difference between this embodiment and Embodiment 5 is that at least some of the components in the lens barrel assembly and the spacer element group have different structural dimensions.

[0133] Figure 16The on-axis chromatic aberration curves of the optical imaging lens of Embodiment 5 or 6 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 17 The astigmatism curves of the optical imaging lens of Embodiment 5 or 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 18 The distortion curves of the optical imaging lens of Embodiment 5 or 6 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 19 The magnification chromatic aberration curves of the optical imaging lens of Embodiment 5 or 6 are shown, representing the aberrations at different image heights on the imaging plane after light passes through the lens. According to... Figures 16 to 19 It can be seen that the optical imaging lens of Embodiment 5 or 6 can achieve good imaging quality.

[0134] Example 7

[0135] The following is for reference Figure 20 Describes an optical imaging lens according to Embodiment 7 of this application.

[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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within 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, the image-side of the seventh lens E7 may also be provided with an optical element, such as a filter, having an object-side surface S15 (not shown) and an image-side surface S16 (not shown). Light from the object passes sequentially through surfaces S1 to S16 and is finally imaged onto 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 spacer elements can block excess light from entering the next lens during the imaging process, while also allowing the lens and lens barrel to better fit together, thus 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 for radius of curvature and thickness / distance are millimeters (mm).

[0140]

[0141]

[0142] Table 7

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

[0144]

[0145]

[0146] Table 8

[0147] Example 8

[0148] The following is based on Figure 21 Describes an optical imaging lens according to Embodiment 8 of this application.

[0149] like Figure 21 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 sequentially along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the first lens E1 and the second lens E2. Specifically, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, and the fifth lens E5 are located within the first lens barrel P10, and the sixth lens E6 and the seventh lens E7 are located within the second lens 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 group in this embodiment is the same as that of the optical lens group in Embodiment 7. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 7, and the aspherical coefficient table is the same as that in Table 8. The difference between this embodiment and Embodiment 7 is that at least some of the components in the lens barrel assembly and the spacer element group have different structural dimensions.

[0151] Figure 22 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 7 or 8 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 23 The astigmatism curves of the optical imaging lens of Embodiment 7 or 8 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 24 The distortion curves of the optical imaging lens of Embodiment 7 or 8 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Figure 25 The magnification chromatic aberration curves of the optical imaging lens of Embodiment 7 or 8 are shown, representing the aberrations at different image heights on the imaging plane after light passes through the lens. According to... Figures 22 to 25 It can be seen that the optical imaging lens of Embodiment 7 or 8 can achieve good imaging quality.

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

[0153] Parameters / Examples 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 parameters d1s, D1s, d2s, D2s, d3s, d3m, D3s, D3m, d4m, D4m, d6m, CP1, CP2, CP4, CP6, EP12, EP23, EP34, and EP206 for each embodiment in Examples 1-8. Some of these parameters can be adjusted according to... Figure 1 The annotation method shown is used for measurement.

[0156]

[0157]

[0158] Table 10

[0159] Table 11 shows the values ​​of the conditional expressions for each of the embodiments in Examples 1-8.

[0160] Conditional / 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 this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above 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 includes a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with negative optical power, arranged sequentially along the optical axis from the object side to the image side. The spacer group includes a second spacer element disposed on the image-side surface of the second lens and in contact with the image-side surface of the second lens, and a third spacer element disposed on the image-side surface of the third lens 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 disposed within the lens barrel assembly; The optical imaging lens has seven lenses with optical power. Wherein, the center 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: 1.25≤CT3 / EP23≤2.40; The radius of curvature 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 gap T23 between the second and third lenses on the optical axis satisfy: 5.0 <f3 / (CP2+T23)<8.2; The object-side surface of the first lens is convex, and the image-side surface is concave. The object-side surface of the seventh lens is concave, and the image-side surface is also concave.

2. The optical imaging lens according to claim 1, characterized in that, 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, characterized in that, 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: 1.75≤(R5 / D2s) / (R4 / d2s)≤2.

35.

4. The optical imaging lens according to claim 1, characterized in that, 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: 2.29≤R7 / d3m<4.

3.

5. The optical imaging lens according to claim 1, characterized in that, The outer diameter D3m of the image-side surface of the third spacer element and the radius of curvature R8 of the image-side surface of the fourth lens satisfy the following condition: 1.99≤D3m / R8<2.

65.

6. The optical imaging lens according to any one of claims 1 to 5, characterized in that, The spacer element group further includes a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens; 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 along the optical axis satisfy: 2.7 <EP12 / CT2<4.35。 7. The optical imaging lens according to any one of claims 1 to 5, characterized in that, The spacer element group further includes a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens; 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.

14.

8. The optical imaging lens according to any one of claims 1 to 5, characterized in that, 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 distance EP34 between the third spacer element and the fourth spacer element along the optical axis and the center thickness CT4 of the fourth lens on the optical axis satisfy the following condition: 2.00≤EP34 / CT4<3.

8.

9. The optical imaging lens according to any one of claims 1 to 5, characterized in that, 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 and fifth lenses on the optical axis satisfy: 1.95 <CT5 / (CP4+T45)≤2.23。 10. The optical imaging lens according to any one of claims 1 to 5, characterized in that, 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 and seventh lenses on the optical axis satisfy the following: -9.63≤(f6+f7) / (CP6+T67)≤-8.

26.

11. The optical imaging lens according to claim 2, characterized in that, 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 face 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 satisfy: 3.77≤EP206 / CT6<4.

65.

12. The optical imaging lens according to any one of claims 1 to 5, characterized in that, The spacer element group further includes a first spacer element disposed on the image side of the first lens and in contact with the image side of the first lens; 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: 1.68≤R2 / R3 / (D1s / d1s)<2.

15.

13. The optical imaging lens according to any one of claims 1 to 5, characterized in that, 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 radius of curvature 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, characterized in that, 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 radius of curvature 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, characterized in that, 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 also 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 convex, and the image-side surface is also convex. The object-side surface of the sixth lens is concave, and the image-side surface is convex.

Images