Optical imaging lens

Abstract

The present application provides an optical imaging lens, which comprises a lens barrel, a lens set arranged in the lens barrel and a plurality of spacer elements; the lens set is sequentially arranged along the optical axis from the object side to the image side as a first lens with negative focal power, the first lens image side is concave; a second lens with positive focal power, the second lens object side is convex; a third lens with negative focal power, the third lens object side is concave; a fourth lens with positive focal power, the fourth lens object side and image side are both convex; a fifth lens with negative focal power, the fifth lens image side is concave; a sixth lens with positive focal power, the sixth lens object side is convex, and the sixth lens material is glass; there is at least one spacer element between any two adjacent lenses, and the spacer element is in contact with the lens part adjacent to its object side.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more particularly to an optical imaging lens. Background Technology

[0002] Smartphone camera modules are highly integrated, and wide-angle lenses, due to their wide shooting angle, have become standard in multi-camera systems, meeting the needs of shooting large scenes such as landscapes and architecture. However, with the trend of smartphone miniaturization and high pixel count, existing wide-angle lenses still have the following shortcomings:

[0003] Wide-angle lenses have a significantly increased angle of incidence of light at the edges, causing unintended reflections of light on the lens surface, especially at the edges of aspherical lenses. Secondly, the miniaturization design compresses the spacing between lenses, making light more prone to reflection on the lens surface and within the mechanical structure, creating stray light and affecting the sharpness of the lens image.

[0004] In other words, existing six-element wide-angle optical imaging lenses suffer from stray light issues due to the need for lens miniaturization. Summary of the Invention

[0005] The main objective of this invention is to provide an optical imaging lens that addresses the problem of stray light in existing six-element wide-angle optical imaging lenses, which arises from the need for miniaturization. One objective of this invention is to suppress stray light (such as wavy or funnel-shaped spots) generated by multiple reflections of large-angle incident light on the lens surface and within the mechanical structure through structural optimization.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, a lens group disposed in the lens barrel, and a spacer element group;

[0007] The lens group is arranged sequentially from the object side to the image side along the optical axis:

[0008] A first lens having negative optical power, wherein the image-side surface of the first lens is concave.

[0009] A second lens having positive optical power, wherein the object-side surface of the second lens is convex.

[0010] A third lens with negative optical power, wherein the object-side surface of the third lens is concave;

[0011] A fourth lens with positive optical power, wherein both the object-side and image-side surfaces of the fourth lens are convex.

[0012] A fifth lens with negative optical power, wherein the image-side surface of the fifth lens is concave;

[0013] A sixth lens having positive optical power, wherein the object-side surface of the sixth lens is convex, and the material of the sixth lens is glass; and

[0014] The plurality of spacer elements includes: a first spacer element placed between the first lens and the second lens and in contact with the image-side surface of the first lens; a second spacer element placed between the second lens and the third lens and in contact with the image-side surface of the second lens; a third spacer element placed between the third lens and the fourth lens and in contact with the image-side surface of the third lens; a fourth spacer element placed between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens; a fifth spacer element placed between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens; and a spacer element placed on the image side of the sixth lens and in contact with the image-side surface of the sixth lens; wherein the optical imaging lens satisfies the following conditions: -3.45 < R8 / CP4 ≤ -2.35, 0.68 ≤ CT4 / (D4s-d4s) < 2.70; wherein R8 is the radius of curvature of the image-side surface of the fourth lens, CP4 is the maximum thickness of the fourth spacer element, CT4 is the center thickness of the fourth lens, D4s is the outer diameter of the object-side surface of the fourth spacer element, and d4s is the inner diameter of the object-side surface of the fourth spacer element.

[0015] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 0.80 < ∑CP / ∑AT ≤ 1.51; where ∑CP is the sum of the maximum thicknesses of each spacer element, i.e., ∑CP = CP1 + CP2 + CP3 + CP4 + CP5 + CP6, and ∑AT is the sum of the air gaps on the optical axis between any two adjacent lenses of the optical imaging lens, i.e., ∑AT = T12 + T23 + T34 + T45 + T56.

[0016] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 1.70 < T12 / CP1 ≤ 2.86; where T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the maximum thickness of the first spacer element.

[0017] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: -6.85≤f1 / (d1s-d1m)<-2.55; where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacer element, and d1m is the inner diameter of the image side of the first spacer element.

[0018] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 4.10 < R3 / d1m ≤ 4.97; where R3 is the radius of curvature of the object side of the second lens, and d1m is the inner diameter of the image side of the first spacer element.

[0019] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 1.89≤(D1m-d1m) / DT21≤7.45; where D1m is the outer diameter of the image side of the first spacer element, d1m is the inner diameter of the image side of the first spacer element, and DT21 is the radius of the light-transmitting area of ​​the object side of the second lens.

[0020] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 2.49≤TD / Tr2r8≤4.35, 1.60<f234 / EP14≤3.51; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, Tr2r8 is the axial distance from the image side of the first lens to the image side of the fourth lens, f234 is the combined focal length of the second, third, and fourth lenses, and EP14 is the distance along the optical axis from the image side of the first spacer element to the object side of the fourth spacer element.

[0021] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 1.54≤(EP23+CP3) / (CT3+T34)≤3.60; where EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, CT3 is the center thickness of the third lens, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

[0022] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 2.90 < D3m / (CT4+EP34) ≤ 5.87; where D3m is the outer diameter of the image side of the third spacer element, CT4 is the center thickness of the fourth lens, and EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element along the optical axis.

[0023] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 0.40 < CP4 / (D4s-d4s) ≤ 1.95; where CP4 is the maximum thickness of the fourth spacer element, D4s is the outer diameter of the side surface of the fourth spacer element, and d4s is the inner diameter of the side surface of the fourth spacer element.

[0024] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 2.45 < f4 / (CP4-T45) < 5.45; where f4 is the effective focal length of the fourth lens, CP4 is the maximum thickness of the fourth spacer element, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

[0025] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 0.35≤|SAG62| / CP6<1.30; where SAG62 is the axial displacement from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and CP6 is the maximum thickness of the sixth spacer element.

[0026] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 0.70 < f6 / d6m ≤ 1.96; where f6 is the effective focal length of the sixth lens and d6m is the inner diameter of the image side of the sixth spacer element.

[0027] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 2.60 < D5m / DT61 ​​< 5.40; where D5m is the outer diameter of the side surface of the fifth spacer element, and DT61 is the radius of the light-transmitting area of ​​the side surface of the sixth lens.

[0028] According to at least one embodiment of this application, the optical imaging lens satisfies the following relationship: 0.85 < TD / d0m < 1.35; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, and d0m is the inner diameter of the image side of the lens barrel.

[0029] Applying the technical solution of this invention, the optical imaging lens of this application consists of a lens barrel, a lens group disposed in the lens barrel, and multiple spacer elements. By reasonably controlling the structural dimensions of the spacer elements, the ratio of the radius of curvature of the image side of the fourth lens to the maximum thickness of the fourth spacer element satisfies -3.45 < R8 / CP4 ≤ -2.35, so that the light diverges to obtain a sufficient image plane, while ensuring the assembly space of the fourth lens, avoiding contact with the object side of the fifth lens, and avoiding pressure damage during assembly.

[0030] However, if the spacing between the fourth and fifth lenses is too large, light is easily reflected back and forth between the structural parts of the fourth and fifth lenses, resulting in internal reflection stray light. To solve the stray light generated between the fourth and fifth lenses and improve the image quality of the lens, this application controls the ratio of the axial distance from the center of the object side of the fourth lens to the center of the image side in the optical axis direction to the difference between the outer diameter of the object side of the fourth spacer element and the inner diameter of the image side of the fourth spacer element by constraining 0.68≤CT4 / (D4s-d4s)<2.70, thereby blocking excess stray light and achieving the purpose of optimizing stray light. Attached Figure Description

[0031] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the drawings, unless otherwise specified, the same reference numerals are used to denote the same parts. Wherein:

[0032] Figure 1 A dimensioned diagram of an optical imaging lens according to an alternative embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the structure of the optical imaging lens of Embodiment 1-1 of the present invention is shown;

[0034] Figure 3 The diagram shows a schematic representation of the optical imaging lens of Embodiments 1-2 of the present invention.

[0035] Figure 4 The diagram shows the structural schematics of the optical imaging lenses of embodiments 1-3 of the present invention;

[0036] Figures 5A to 5D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 of the present invention are shown respectively.

[0037] Figure 6 A schematic diagram of the optical imaging lens of Embodiment 2-1 of the present invention is shown;

[0038] Figure 7 A schematic diagram of the structure of the optical imaging lens of Embodiment 2-2 of the present invention is shown;

[0039] Figure 8 The diagram shows the structural schematics of the optical imaging lenses of embodiments 2-3 of the present invention;

[0040] Figures 9A to 9D The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 2 of the present invention are shown respectively.

[0041] Figure 10 A schematic diagram of the optical imaging lens of Embodiment 2-1 of the present invention is shown;

[0042] Figure 11 A schematic diagram of the structure of the optical imaging lens of Embodiment 2-2 of the present invention is shown;

[0043] Figure 12 The diagram shows the structural schematics of the optical imaging lenses of embodiments 2-3 of the present invention;

[0044] Figures 13A to 13DThe on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 3 of the present invention are shown respectively.

[0045] Figure 14A The diagram shows stray light spots when the optical imaging lens of an optional embodiment of the present invention satisfies R8 / CP4=-2.93 and CT4 / (D4s-d4s)=1.75;

[0046] Figure 14B The diagram shows stray light spots of an optical imaging lens according to an optional embodiment of the present invention when R8 / CP4 = -2.93 and CT4 / (D4s-d4s) = 2.00.

[0047] Figure 14C The stray light spot diagram of the optical imaging lens of Example 1 is shown when R8 / CP4=-2.93 and CT4 / (D4s-d4s)=0.53.

[0048] Figure 14D The stray light spot diagram of the optical imaging lens of Example 2 is shown when R8 / CP4=-2.93 and CT4 / (D4s-d4s)=2.97;

[0049] The above figures include the following reference numerals:

[0050] P0, Lens tube; E1, First lens; P1, First spacer element; E2, Second lens; P2, Second spacer element; E3, Third lens; P3, Third spacer element; E4, Fourth lens; P4, Fourth spacer element; E5, Fifth lens; P5, Fifth spacer element; E6, Sixth lens; P6, Sixth spacer element; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens; S13, Object-side surface of the filter or protective glass; S14, Image-side surface of the filter or protective glass; S15, Imaging plane. Detailed Implementation

[0051] It should be noted that the embodiments shown in the accompanying drawings are merely examples used to specifically and vividly explain and illustrate the concept of the present invention. They are not necessarily drawn to scale in terms of size and structure, nor do they constitute a limitation on the concept of the present invention.

[0052] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the various accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0053] 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.

[0054] In this paper, the paraxial region refers to the area near the optical axis. If the lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined by the sign of the R value (R refers to the radius of curvature of the paraxial region). In this paper, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, when the R value is positive, it is considered convex, and when the R value is negative, it is considered concave; for the image-side surface, when the R value is positive, it is considered concave, and when the R value is negative, it is considered convex.

[0055] In order to meet the requirements of miniaturization, the six-element wide-angle optical imaging lens in the existing technology has the problem that the incident light at a large angle is reflected by the lens surface and mechanical structure, forming stray light, which affects the image sharpness of the lens.

[0056] To address the above problems, the present invention provides an optical imaging head, as shown in the accompanying drawings of this application. Figures 1 to 14D As shown, the optical imaging lens includes a lens barrel and a lens group and multiple spacer elements disposed in the lens barrel. The lens group is arranged sequentially from the object side to the image side along the optical axis: a first lens E1 with negative optical power, a second lens E2 with positive optical power, a third lens E3 with negative optical power, a fourth lens E4 with positive optical power, a fifth lens E5 with negative optical power, and a sixth lens E6 with positive optical power.

[0057] The first lens E1 has a first lens object-side surface S1 and a first lens image-side surface S2, wherein the first lens image-side surface S2 is concave; the second lens E2 has a second lens object-side surface S3 and a second lens image-side surface S4, wherein the second lens object-side surface S3 is convex; the third lens E3 has a third lens object-side surface S5 and a third lens image-side surface S6, wherein the third lens object-side surface S5 is concave; the fourth lens E4 has a fourth lens object-side surface S7 and a fourth lens image-side surface S8, wherein both the fourth lens object-side surface S7 and the fourth lens image-side surface S8 are convex; the fifth lens E5 has a fifth lens object-side surface S9 and a fifth lens image-side surface S10, wherein the fifth lens image-side surface S10 is concave; the sixth lens E6 has a sixth lens object-side surface S11 and a sixth lens image-side surface S12, wherein the sixth lens object-side surface S11 is convex, and the sixth lens E6 is a glass lens.

[0058] The plurality of spacers include: a first spacer element placed between the first lens E1 and the second lens E2, wherein the object side of the first spacer element P1 is in partial contact with the image side S1 of the first lens; a second spacer element placed between the second lens E2 and the third lens E3, wherein the object side of the second spacer element P2 is in partial contact with the image side S3 of the second lens; a third spacer element placed between the third lens E3 and the fourth lens E4, wherein the object side of the third spacer element P3 is in partial contact with the image side S5 of the third lens; a fourth spacer element placed between the fourth lens E4 and the fifth lens E5, wherein the object side of the fourth spacer element P4 is in partial contact with the image side S7 of the fourth lens; a fifth spacer element placed between the fifth lens E5 and the sixth lens E6, wherein the object side of the fifth spacer element P5 is in partial contact with the image side S9 of the fifth lens; and a sixth spacer element placed on the image side of the sixth lens E6, wherein the object side of the sixth spacer element P6 is in partial contact with the image side S11 of the sixth lens.

[0059] Among them, the radius of curvature R8 of the image side surface S8 of the fourth lens and the maximum thickness CP4 of the fourth spacer element P4 satisfy: 3.45<R8 / CP4≤-2.35; the center thickness CT4 of the fourth lens E4, the outer diameter D4s of the object side surface of the fourth spacer element P4 and the inner diameter d4s of the object side surface of the fourth spacer element P4 satisfy: 0.68≤CT4 / (D4s-d4s)<2.70.

[0060] It is worth mentioning that, by limiting the ratio of the curvature radius R8 of the fourth lens image side surface S8 to the maximum thickness of the fourth spacer element P4 to be in the range of -3.45 to -2.35, the optical imaging lens of this application can ensure that the light divergence angle of the convex surface of the fourth lens matches the thickness of the adjacent spacer element. This can both prevent the light from diverging excessively due to the excessive curvature of the fourth lens image side surface S8, and prevent the spacer element from being too thick, which would increase the distance between the fourth lens E4 and the fifth lens E5. This can ensure the assembly space of the fourth lens, avoid contact with the side surface of the fifth lens, and avoid pressure damage during assembly.

[0061] Meanwhile, the ratio of the center thickness CT4 of the fourth lens E4 to the difference between the inner and outer diameters of the side surface of the spacer element is controlled within a reasonable range of 0.68≤CT4 / (D4s-d4s)<2.70, so as to avoid excessive obstruction of the effective light-transmitting aperture by the spacer element. Through precise matching of geometric dimensions, a balance between stray light blocking and light transmission is achieved.

[0062] like Figure 14A and Figure 14B As shown, when R8 / CP4=-2.93, CT4 / (D4s-d4s)=1.75 or R8 / CP4=-2.93, CT4 / (D4s-d4s)=2.00, the fourth spacer element can effectively absorb the light reflected from the fourth lens flange position, and no stray light with strong energy appears.

[0063] like Figure 14C As shown, when R8 / CP4=-2.93 and CT4 / (D4s-d4s)=0.53, (D4s-d4s) is too large relative to CT4, that is, the difference between the inner and outer diameters of the spacer element is too large, and the inner diameter of the image side of the spacer element is too small. Its blocking range exceeds the effective light-transmitting aperture of the fourth lens, and instead forms excessive blocking at the edge of the fourth lens. At this time, the light is reflected from the effective diameter part of the image side of the fifth lens to the flange position of the fourth lens, and then projected into the effective diameter part of the fifth lens again, finally reaching the image plane, and producing wavy stray light on the image plane.

[0064] like Figure 14D As shown, when R8 / CP4=-2.93 and CT4 / (D4s-d4s)=2.97, (D4s-d4s) is too small relative to CT4, that is, the difference between the inner and outer diameters of the spacer element is too small, resulting in the inner diameter of the image side of the spacer element being too large, which cannot effectively block the reflected light from the edge of the fourth lens. The light is reflected from the effective diameter part of the object side of the fifth lens to the flange position of the fourth lens, and then projected into the flange position of the fifth lens again, finally producing a funnel-shaped stray light on the image surface, which is manifested as a ring-shaped light spot with a bright center and a dark edge.

[0065] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 0.80 < ∑CP / ∑AT ≤ 1.51; where ∑CP is the sum of the maximum thicknesses of each spacer element in the optical axis direction, and ∑AT is the sum of the air gaps between any two adjacent lenses of the optical imaging lens in the optical axis.

[0066] This application achieves a reasonable ratio between the thickness of the spacer element and the air gap between the lenses by limiting the above conditions, resulting in a relatively uniform distribution of the air gap on the optical axis and thus improving the uniformity of image illumination.

[0067] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 1.70 < T12 / CP1 ≤ 2.86; where T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the maximum thickness of the first spacer element.

[0068] This application, by limiting the above conditions, knows that the image side of the first lens is concave and the object side of the second lens is convex. By using the above conditions, sufficient distance is provided for the convergence of light rays passing through the object side of the first lens, while effectively preventing light rays from being reflected at the flange position of the first lens, thereby achieving the purpose of improving stray light.

[0069] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: -6.85≤f1 / (d1s-d1m)<-2.55; where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacer element, and d1m is the inner diameter of the image side of the first spacer element.

[0070] This application improves the imaging quality of the optical imaging lens by reasonably allocating the optical power by limiting the above conditions. At the same time, by controlling the difference between the inner and outer diameters of the first spacing element, stray light that passes directly through the edge of the first lens can be blocked, thereby improving the stray light.

[0071] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 4.10 < R3 / d1m ≤ 4.97; where R3 is the radius of curvature of the object side of the second lens, and d1m is the inner diameter of the image side of the first spacer element.

[0072] Given that the object side of the second lens is convex, this application can improve the manufacturability of the second lens by controlling the above conditions, by controlling the radius of curvature of the object side of the second lens and the inner diameter of the image side of the first spacer element. At the same time, a reasonable inner diameter of the image side of the first spacer element can provide effective structural support for the second lens, improve the assembly yield, and achieve the purpose of improving the stability of the lens structure.

[0073] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 1.89≤(D1m-d1m) / DT21≤7.45; where D1m is the outer diameter of the image side of the first spacer element, d1m is the inner diameter of the image side of the first spacer element, and DT21 is the radius of the light-transmitting area of ​​the object side of the second lens.

[0074] This application, by controlling the above conditions, ensures that the first spacer element effectively blocks stray light from entering the flange position of the second lens, thereby improving stray light in the second lens. Simultaneously, it ensures that the spacer element does not block the effective diameter portion, preventing insufficient light transmission and vignetting, thus improving the imaging quality of the optical imaging lens.

[0075] Furthermore, in a specific embodiment of this application, the optical imaging lens simultaneously satisfies the following conditions: 2.49≤TD / Tr2r8≤4.35, 1.60<f234 / EP14≤3.51; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, Tr2r8 is the axial distance from the image side of the first lens to the image side of the fourth lens, f234 is the combined focal length of the second, third, and fourth lenses, and EP14 is the distance along the optical axis from the image side of the first spacer element to the object side of the fourth spacer element.

[0076] This application limits the axial dimension of the lens by controlling the ratio of the axial distance TD between the object side of the first lens and the image side of the sixth lens to the axial distance Tr2r8 between the image side of the first lens and the image side of the fourth lens, thus ensuring the miniaturization of the lens. However, the compact assembly of the lenses may lead to the risk of low assembly yield. Therefore, by controlling the ratio of the combined focal length f234 of the second, third, and fourth lenses to the distance EP14 along the optical axis between the image side of the first spacer element and the object side of the fourth spacer element, the edge thickness of the lens can be effectively controlled, ensuring the feasibility of lens forming in the middle section of the lens, ensuring the total optical power of the optical imaging lens, and optimizing the optical aberration of the system.

[0077] Further, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 1.54≤(EP23+CP3) / (CT3+T34)≤3.60; where EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, CT3 is the center thickness of the third lens, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

[0078] By controlling the above conditions, this application can ensure the overall uniformity of the thickness of the third lens, which is beneficial to the forming and processing of the third lens, reduces field curvature sensitivity, improves assembly stability, and helps to improve the problems of transmitted stray light and internal reflection stray light between the third and fourth lenses, thereby improving the imaging capability of the lens.

[0079] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 2.90 < D3m / (CT4 + EP34) ≤ 5.87; where D3m is the outer diameter of the image side of the third spacer element, CT4 is the center thickness of the fourth lens, and EP34 is the distance along the optical axis from the image side of the third spacer element to the object side of the fourth spacer element.

[0080] By controlling the above conditions, this application can ensure the positioning accuracy of the lens during assembly, reduce the risk of fourth lens misalignment, and improve the overall assembly yield of the optical imaging lens.

[0081] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 0.40 < CP4 / (D4s-d4s) ≤ 1.95; where CP4 is the maximum thickness of the fourth spacer element, D4s is the outer diameter of the side surface of the fourth spacer element, and d4s is the inner diameter of the side surface of the fourth spacer element.

[0082] By controlling the above conditions, this application can improve the stiffness of the fourth spacer element, thereby enhancing the lens structure's resistance to vibration and impact; at the same time, it can block reflected light, which helps to improve the overall lens stray light.

[0083] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 2.45 < f4 / (CP4-T45) < 5.45; where f4 is the effective focal length of the fourth lens, CP4 is the maximum thickness of the fourth spacer element, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

[0084] This application, by controlling the above conditions, ensures sufficient space between the fourth and fifth lenses, effectively reducing the risk of interference between the fourth and fifth lenses and the fourth spacer element during assembly, reducing the sensitivity of the gap to high temperature and humidity, effectively improving the optical aberrations of the fourth and fifth lenses, which is beneficial to improving the reliability of the lens and the imaging quality of the lens.

[0085] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 0.35≤|SAG62| / CP6<1.30; where SAG62 is the axial displacement from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and CP6 is the maximum thickness of the sixth spacer element.

[0086] By controlling the above conditions, this application can effectively reduce the risk of the sixth lens protruding from the rear end of the lens barrel and effectively avoid scratches on the sixth lens during the assembly of the lens and the module.

[0087] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 0.70 < f6 / d6m ≤ 1.96; where f6 is the effective focal length of the sixth lens and d6m is the inner diameter of the image side of the sixth spacer element.

[0088] By controlling the above conditions, this application can ensure that the sixth spacer element does not excessively block light, thus guaranteeing the relative illumination of the lens and optimizing aberrations. The effective focal length of the sixth lens is highly correlated with field curvature and distortion. Selecting a suitable effective focal length for the sixth lens can effectively improve aberrations such as field curvature and distortion, thereby enhancing the image quality of the lens.

[0089] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 2.60 < D5m / DT61 ​​< 5.40; where D5m is the outer diameter of the image side of the fifth spacer element, and DT61 is the radius of the light-transmitting area of ​​the object side of the sixth lens.

[0090] This application improves the overall image quality of the lens by controlling the above conditions. Because the sixth lens mechanism has a large area, it is prone to producing more stray light. Therefore, by controlling the outer diameter of the object side of the fifth spacer element P5, stray light is blocked, thereby improving the overall image quality of the lens.

[0091] Furthermore, in a specific embodiment of this application, the optical imaging lens satisfies the following condition: 0.85 < TD / d0m < 1.35; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, and d0m is the inner diameter of the image side of the lens barrel.

[0092] This application controls the above conditions to ensure lens miniaturization while effectively reducing stray light entering the imaging surface, thereby improving image quality.

[0093] Example 1

[0094] like Figures 2 to 5D As shown, the optical imaging lens of Embodiment 1 is described. Figure 2A schematic diagram of the optical imaging lens of Embodiment 1-1 is shown. Figure 3 The diagram shows the structure of the optical imaging lens in Embodiments 1-2. Figure 4 A schematic diagram of the optical imaging lens of Embodiments 1-3 is shown.

[0095] like Figures 2 to 4 As shown, the optical imaging lenses of embodiments 1-1 to 1-3 include a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, and a sixth spacer P6 arranged sequentially along the optical axis from the object side to the image side in the lens barrel P0.

[0096] like Figure 2 The diagram shows a schematic of the optical imaging lens in Embodiment 1-1. In this example, the object-side and image-side surfaces of the first spacer element P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side and image-side surfaces of the second spacer element P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side and image-side surfaces of the third spacer element P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side and image-side surfaces of the fourth spacer element P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side and image-side surfaces of the fifth spacer element P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively. The object-side surface of the sixth spacer element P6 abuts against the image-side surface S12 of the sixth lens.

[0097] like Figure 3 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 1-2. In this example, the bearing and contact method of each spacer element is the same as that of Embodiment 1-1, and can be referred to the relevant description in Embodiment 1-1, which will not be repeated here.

[0098] like Figure 4 The diagram shown is a structural schematic of the optical imaging lens of Embodiments 1-3. In this example, the bearing and contact method of each spacer element is the same as that of Embodiment 1-1, and can be referred to the relevant description in Embodiment 1-1, which will not be repeated here.

[0099] In summary, the structural parameters of the optical imaging lens of Embodiment 1 under Embodiments 1-1, 1-2, and 1-3 are shown in Table 1. (Unit: mm)

[0100] Table 1

[0101]

[0102] Example 1 Figures 2 to 4 As shown, the optical imaging lens includes: a first lens E1 with negative optical power, whose object-side surface S1 is convex and image-side surface S2 is concave; a second lens E2 with positive optical power, whose object-side surface S3 is convex and image-side surface S4 is convex; a third lens E3 with negative optical power, whose object-side surface S5 is concave and image-side surface S6 is concave; a fourth lens E4 with positive optical power, whose object-side surface S7 is convex and image-side surface S8 is convex; a fifth lens E5 with negative optical power, whose object-side surface S9 is convex and image-side surface S10 is concave; and a sixth lens E6 with positive optical power, whose object-side surface S11 is convex and image-side surface S12 is convex. In the table, S13 and S14 are the object-side and image-side surfaces of the filter or protective glass, and S15 is the imaging surface (S13, S14, and S15 are as follows). Figure 2 As shown in the figure (other figures omitted), OBJ (not shown in the figure) is the object distance, STO (not shown in the figure) is the aperture, and the aperture is set between the first lens E1 and the second lens E2.

[0103] Table 2 shows the optical parameters of the optical imaging lens in Embodiment 1, including the effective focal length of each lens and the total effective focal length f of the optical imaging lens. (Unit: mm)

[0104] Table 2

[0105]

[0106] Table 3 shows the basic structural parameters of the optical imaging lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0107] Table 3

[0108]

[0109] Table 4 shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1-S10 in Example 1.

[0110] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 to the fifth lens E5 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0111] (Formula 1)

[0112] In the above formula, The height perpendicular to the optical axis is along the optical axis. The axial distance from the vertex to the surface at the location; This represents the curvature at the vertex of the aspherical surface. The conic coefficient; , , , , , , ...represent aspheric coefficients of the fourth, sixth, eighth, tenth, twelfth, fourteenth, and sixteenth orders, respectively.

[0113] Table 4

[0114]

[0115] Table 5 shows the conditional data of the optical imaging lens of Example 1 under Examples 1-1, 1-2, and 1-3.

[0116] Table 5

[0117]

[0118] Figure 5A The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 5B The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 5C The distortion curve of the optical imaging lens of Embodiment 1 is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 5D The magnification chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to... Figures 5A to 5D As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0119] Example 2

[0120] like Figures 6 to 9D As shown, the optical imaging lens of Embodiment 2 is described. Figure 6 A schematic diagram of the optical imaging lens of Embodiment 2-1 is shown. Figure 7 A schematic diagram of the optical imaging lens of Embodiment 2-2 is shown. Figure 8 A schematic diagram of the optical imaging lens of Embodiments 2-3 is shown.

[0121] like Figures 6 to 8As shown, the optical imaging lenses of embodiments 2-1 to 2-3 include a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, and a sixth spacer P6 arranged sequentially along the optical axis from the object side to the image side in the lens barrel P0.

[0122] like Figure 6 The diagram shows a schematic of the optical imaging lens in Embodiment 2-1. In this example, the object-side and image-side of the first spacer element P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer element P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer element P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer element P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer element P5 abut against the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively. The object-side of the sixth spacer element P6 abuts against the image-side S12 of the sixth lens.

[0123] like Figure 7 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-2. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0124] like Figure 8 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-3. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0125] In summary, the structural parameters of the optical imaging lens of Embodiment 2 under Embodiments 2-1, 2-2, and 2-3 are shown in Table 6. (Unit: mm)

[0126] Table 6

[0127]

[0128] Example 2 Figures 6 to 8As shown, the optical imaging lens includes: a first lens E1 with negative optical power, whose object-side surface S1 is concave and image-side surface S2 is concave; a second lens E2 with positive optical power, whose object-side surface S3 is convex and image-side surface S4 is convex; a third lens E3 with negative optical power, whose object-side surface S5 is concave and image-side surface S6 is convex; a fourth lens E4 with positive optical power, whose object-side surface S7 is convex and image-side surface S8 is convex; a fifth lens E5 with negative optical power, whose object-side surface S9 is concave and image-side surface S10 is concave; and a sixth lens E6 with positive optical power, whose object-side surface S11 is convex and image-side surface S12 is concave. In the table, S13 and S14 are the object-side and image-side surfaces of the filter or protective glass, S15 is the imaging plane, OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture, which is located between the first lens E1 and the second lens E2.

[0129] Table 7 shows the optical parameters of the optical imaging lens in Example 2, including the effective focal length of each lens and the total effective focal length f of the optical imaging lens. (Unit: mm)

[0130] Table 7

[0131]

[0132] Table 8 shows the basic structural parameters of the optical imaging lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0133] Table 8

[0134]

[0135] Table 9 shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical lens S1-S10 in Embodiment 2. In Embodiment 2, the object-side and image-side surfaces of the first lens E1 to the fifth lens E5 are aspherical, and the surface shape of each aspherical lens can be, but is not limited to, the formula (1) given in Embodiment 1 above.

[0136] Table 9

[0137]

[0138] Table 10 shows the conditional data of the optical imaging lens of Example 2 under Examples 2-1, 2-2, and 2-3.

[0139] Table 10

[0140]

[0141] Example 3

[0142] like Figures 10 to 13D As shown, the optical imaging lens of Embodiment 3 is described. Figure 10 A schematic diagram of the optical imaging lens of Embodiment 3-1 is shown. Figure 11 A schematic diagram of the optical imaging lens of Embodiment 3-2 is shown. Figure 12 A schematic diagram of the optical imaging lens of Embodiment 3-3 is shown.

[0143] like Figures 10 to 12 As shown, the optical imaging lenses of embodiments 3-1 to 3-3 include a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a sixth lens E6, and a sixth spacer P6 arranged sequentially along the optical axis from the object side to the image side in the lens barrel P0.

[0144] like Figure 10 The diagram shows a schematic of the optical imaging lens in Embodiment 3-1. In this example, the object-side and image-side surfaces of the first spacer element P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side and image-side surfaces of the second spacer element P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side and image-side surfaces of the third spacer element P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side and image-side surfaces of the fourth spacer element P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side and image-side surfaces of the fifth spacer element P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively. The object-side surface of the sixth spacer element P6 abuts against the image-side surface S12 of the sixth lens.

[0145] like Figure 11 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 3-2. In this example, the bearing and contact method of each spacer element is the same as that of Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0146] like Figure 12 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 3-3. In this example, the abutment and contact method of each spacer element is the same as that of Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0147] In summary, the structural parameters of the optical imaging lens of Embodiment 3 under Embodiments 3-1, 3-2, and 3-3 are shown in Table 11. (Unit: mm)

[0148] Table 11

[0149]

[0150] Example 3 Figures 10 to 12 As shown, the optical imaging lens includes: a first lens E1 with negative optical power, wherein its object-side surface S1 is convex and its image-side surface S2 is concave; a second lens E2 with positive optical power, wherein its object-side surface S3 is convex and its image-side surface S4 is concave; a third lens E3 with negative optical power, wherein its object-side surface S5 is concave and its image-side surface S6 is concave; a fourth lens E4 with positive optical power, wherein its object-side surface S7 is convex and its image-side surface S8 is convex; a fifth lens E5 with negative optical power, wherein its object-side surface S9 is convex and its image-side surface S10 is concave; and a sixth lens E6 with positive optical power, wherein its object-side surface S11 is convex and its image-side surface S12 is concave, and the sixth lens E6 is a glass lens. In the table, S13 and S14 are the object side and image side of the filter or protective glass, S15 is the imaging plane, OBJ (not shown in the figure) is the object distance, and STO (not shown in the figure) is the aperture. The aperture is set between the first lens E1 and the second lens E2.

[0151] Table 12 shows the optical parameters of the optical imaging lens in Embodiment 3, including the effective focal length of each lens and the total effective focal length f of the optical imaging lens. (Unit: mm)

[0152] Table 12

[0153]

[0154] Table 13 shows the basic structural parameters of the optical imaging lenses of Examples 7 to 9, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0155] Table 13

[0156]

[0157] Table 14 shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical lens S1-S10 in Embodiment 3. In Embodiment 3, the object-side and image-side surfaces of the first lens E1 to the fifth lens E5 are aspherical, and the surface shape of each aspherical lens can be, but is not limited to, the formula (1) given in Embodiment 1 above.

[0158] Table 14

[0159]

[0160] Table 15 shows the conditional data of the optical imaging lens of Example 3 under Examples 3-1, 3-2, and 3-3.

[0161] Table 15

[0162]

[0163] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

[0164] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations fall within the protection scope of this invention.

Claims

1. An optical imaging lens, characterized in that, Includes a lens barrel, a lens group disposed within the lens barrel, and multiple spacer elements: The lens group is arranged sequentially from the object side to the image side along the optical axis, and the lens group has six lenses with optical power: The first lens with negative optical power has a concave image-side surface. A second lens with positive optical power has a convex object-side surface; A third lens with negative optical power has a concave object side. The fourth lens with positive optical power has convex surfaces on both its object side and image side. The fifth lens has negative optical power and its image-side surface is concave. The sixth lens has positive optical power, its object side is convex, and the material of the sixth lens is glass; as well as The plurality of spacers include: a first spacer element disposed between the first lens and the second lens and in contact with the image-side surface of the first lens; a second spacer element disposed between the second lens and the third lens and in contact with the image-side surface of the second lens; a third spacer element disposed between the third lens and the fourth lens and in contact with the image-side surface of the third lens; a fourth spacer element disposed between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens; a fifth spacer element disposed between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens; and a sixth spacer element disposed on the image side of the sixth lens and in contact with the image-side surface of the sixth lens. The optical imaging lens satisfies the following conditions: -3.45 < R8 / CP4 ≤ -2.35, 0.68 ≤ CT4 / (D4s - d4s) < 2.70; where R8 is the radius of curvature of the image side surface of the fourth lens, CP4 is the maximum thickness of the fourth spacer element, CT4 is the center thickness of the fourth lens, D4s is the outer diameter of the object side surface of the fourth spacer element, and d4s is the inner diameter of the object side surface of the fourth spacer element. The optical imaging lens also satisfies the following relationship: 4.10 < R3 / d1m ≤ 4.97; where R3 is the radius of curvature of the object-side surface of the second lens, and d1m is the inner diameter of the image-side surface of the first spacer element. The optical imaging lens also satisfies the following relationship: 1.89≤(D1m-d1m) / DT21≤7.45; where D1m is the outer diameter of the image side of the first spacer element, d1m is the inner diameter of the image side of the first spacer element, and DT21 is the radius of the light-transmitting area of ​​the object side of the second lens.

2. The optical imaging lens according to claim 1, characterized in that, The following relationship is satisfied: 0.80<∑CP / ∑AT≤1.51; where ∑CP is the sum of the maximum thicknesses of each spacer element, and ∑AT is the sum of the air gaps on the optical axis between any two adjacent lenses of the optical imaging lens.

3. The optical imaging lens according to claim 2, characterized in that, The following relationship is satisfied: 1.70 < T12 / CP1 ≤ 2.86; where T12 is the air gap between the first lens and the second lens on the optical axis, and CP1 is the maximum thickness of the first spacer element.

4. The optical imaging lens according to claim 3, characterized in that, The following relationship is satisfied: -6.85≤f1 / (d1s-d1m)<-2.55; where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacer element, and d1m is the inner diameter of the image side of the first spacer element.

5. The optical imaging lens according to claim 1, characterized in that, The following relationships are satisfied: 2.49≤TD / Tr2r8≤4.35, 1.60<f234 / EP14≤3.51; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, Tr2r8 is the axial distance from the image side of the first lens to the image side of the fourth lens, f234 is the combined focal length of the second, third, and fourth lenses, and EP14 is the distance along the optical axis from the image side of the first spacer element to the object side of the fourth spacer element.

6. The optical imaging lens according to claim 5, characterized in that, The following relationship is satisfied: 1.54≤(EP23+CP3) / (CT3+T34)≤3.60; where EP23 is the distance along the optical axis from the image side of the second spacer element to the object side of the third spacer element, CP3 is the maximum thickness of the third spacer element, CT3 is the center thickness of the third lens, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

7. The optical imaging lens according to claim 6, characterized in that, The following relationship is satisfied: 2.90<D3m / (CT4+EP34)≤5.87; where D3m is the outer diameter of the image side of the third spacer element, CT4 is the center thickness of the fourth lens, and EP34 is the distance from the image side of the third spacer element to the object side of the fourth spacer element along the optical axis.

8. The optical imaging lens according to claim 7, characterized in that, The following relationship is satisfied: 0.40<CP4 / (D4s-d4s)≤1.95; where CP4 is the maximum thickness of the fourth spacer element, D4s is the outer diameter of the side surface of the fourth spacer element, and d4s is the inner diameter of the side surface of the fourth spacer element.

9. The optical imaging lens according to claim 8, characterized in that, The following relationship is satisfied: 2.45 < f4 / (CP4-T45) < 5.45; where f4 is the effective focal length of the fourth lens, CP4 is the maximum thickness of the fourth spacer element, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

10. The optical imaging lens according to claim 9, characterized in that, The following relationship is satisfied: 0.35≤|SAG62| / CP6<1.30; where SAG62 is the axial displacement from the intersection of the image side surface of the sixth lens and the optical axis to the vertex of the effective radius of the image side surface of the sixth lens, and CP6 is the maximum thickness of the sixth spacer element.

11. The optical imaging lens according to claim 10, characterized in that, The following relationship must be satisfied: 0.70 < f6 / d6m ≤ 1.96; where f6 is the effective focal length of the sixth lens and d6m is the inner diameter of the image side of the sixth spacer element.

12. The optical imaging lens according to claim 11, characterized in that, The following relationship is satisfied: 2.60 < D5m / DT61 ​​< 5.40; where D5m is the outer diameter of the image side of the fifth spacer element, and DT61 is the radius of the light-transmitting area of ​​the object side of the sixth lens.

13. The optical imaging lens according to claim 12, characterized in that, The following relationship is satisfied: 0.85 < TD / d0m < 1.35; where TD is the axial distance from the object side of the first lens to the image side of the sixth lens, and d0m is the inner diameter of the image side of the lens barrel.

Images