Optical imaging lens

Abstract

The present invention provides an optical imaging lens. The optical imaging lens includes a lens barrel, a lens group, and a spacer group disposed therein. The lens group comprises five lenses, which, from the object side to the image side, are, in order: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The lens group satisfies the following conditions: 0.85 ≤ d3s / f3 ≤ 1.35; 1.22 < d3m / |R7| ≤ 2.52; and #imgabs0#. The present invention addresses the problem of increased stray light in prior art five-element optical imaging lenses caused by improper lens and spacer arrangement.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[0002] In the field of optical imaging, the growing popularity of portable electronic products, especially those with camera functions, has led to a continued growth in market demand for such products. These electronic devices often integrate advanced camera functions to meet users' demands for high-quality images and videos. Five-element optical imaging lenses are widely used in a variety of devices due to their compact structure, high cost-effectiveness, and ability to achieve excellent optical performance.

[0003] Currently, five-element optical imaging lenses used in portable electronic devices require sufficient light intake to maintain image quality even in poor lighting conditions or with shaky hands. The dimensions of the lenses or spacers within the optical imaging lens are typically controlled. However, in such cases, ineffective light entering the edges of some lenses can easily generate new stray light, affecting image quality.

[0004] That is to say, the five-element optical imaging lens in the prior art has the problem of unreasonable arrangement of lenses and spacer elements, which leads to increased stray light. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of increased stray light caused by unreasonable arrangement of lenses and spacer elements in the prior art five-element optical imaging lens.

[0006] To achieve the above-mentioned object, according to one aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel, a lens group and a spacer element group arranged in the lens barrel, wherein the lens group is composed of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the first lens has negative optical power; the second lens has optical power, and the object side surface of the second lens is convex; the third lens has positive optical power, and the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the fourth lens has optical power; the fifth lens has optical power; the spacer element group includes a lens disposed in the third lens; the lens group comprises a lens group disposed in the fourth lens; the lens group comprises a lens group disposed in the fifth ... a third spacer element between the lens and the fourth lens and in contact with the image-side surface of the third lens; wherein the relationship between the inner diameter d3s of the object-side surface of the third spacer element and the effective focal length f3 of the third lens satisfies the following: 0.85≤d3s / f3≤1.35; the relationship between the inner diameter d3m of the image-side surface of the third spacer element and the curvature radius R7 of the object-side surface of the fourth lens satisfies the following: 1.22<d3m / |R7|≤2.52; and the relationship between the outer diameter D3s of the object-side surface of the third spacer element, the inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R6 of the image-side surface of the third lens, and the refractive index n3 of the third lens satisfies the following: .

[0007] According to another aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel and a lens group and a spacer element group disposed in the lens barrel, wherein the lens group is composed of five lenses, and the five lenses are, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; the first lens has negative optical power; the second lens has optical power, and the object side surface of the second lens is convex; the third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the fourth lens has optical power; the fifth lens has optical power; the spacer element group includes 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 spacer element disposed between the fourth lens and the fifth lens, and a spacer element disposed between the fourth lens and the fifth lens. a fourth spacer element between the lens elements and in contact with the image side surface of the fourth lens; wherein, an inner diameter d3s of the object side surface of the third spacer element and the effective focal length f3 of the third lens satisfy the following: 0.85≤d3s / f3≤1.35; an inner diameter d3m of the image side surface of the third spacer element and the curvature radius R7 of the object side surface of the fourth lens satisfy the following: 1.22<d3m / |R7|≤2.52; an outer diameter D3s of the object side surface of the third spacer element, an inner diameter d3s of the object side surface of the third spacer element, an outer diameter D4s of the object side surface of the fourth spacer element and an inner diameter d4s of the object side surface of the fourth spacer element satisfy the following: 0.40<(D3s-d3s) / (D4s-d4s)<1.05.

[0008] Furthermore, the spacer element group also includes a first spacer element placed between the first lens and the second lens, and the curvature radius R2 of the image side surface of the first lens and the inner diameter d1s of the object side surface of the first spacer element satisfy: -5.05<R2 / d1s<0.95.

[0009] Furthermore, the effective focal length f1 of the first lens and the inner diameter d0s of the object-side end surface of the lens barrel satisfy the relationship: -1.85<f1 / d0s≤-0.30.

[0010] Furthermore, the spacer element group also includes a first spacer element placed between the first lens and the second lens, and the axial distance EP01 from the object-side end face of the lens barrel to the object-side face of the first spacer element and the outer diameter D0s of the object-side end face of the lens barrel satisfy: 0.15<EP01 / D0s<0.45.

[0011] Furthermore, the spacer element group also includes a first spacer element positioned between the first lens and the second lens, and a second spacer element positioned between the second lens and the third lens. The center thickness CT2 of the second lens on the optical axis of the optical imaging lens, the axial distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element, and the inner diameter d2s of the object side surface of the second spacer element satisfy the following conditions: 0.30≤(CT2+EP12) / d2s<1.40.

[0012] Furthermore, the spacer element group further includes a second spacer element disposed between the second lens element and the third lens element, and the air gap T23 between the image side surface of the second lens element and the object side surface of the third lens element on the optical axis of the optical imaging lens, the outer diameter D2s of the object side surface of the second spacer element, and the maximum axial thickness CP2 of the second spacer element satisfy the following conditions: .

[0013] Furthermore, the spacer element group also includes 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, and the outer diameter D3s of the object side surface of the third spacer element, the inner diameter d3s of the object side surface of the third spacer element, the outer diameter D4s of the object side surface of the fourth spacer element and the inner diameter d4s of the object side surface of the fourth spacer element satisfy the following: 0.40<(D3s-d3s) / (D4s-d4s)<1.05.

[0014] Furthermore, the maximum axial thickness CP3 of the third spacer element, the air gap T34 between the image-side surface of the third lens element and the object-side surface of the fourth lens element on the optical axis of the optical imaging lens, and the center thickness CT4 of the fourth lens element on the optical axis satisfy the following relationship: 0.03≤CP3 / (T34+CT4)<1.10.

[0015] Furthermore, the spacer element group also includes 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, and the curvature radius R7 of the object side surface of the fourth lens and the axial distance EP34 from the image side surface of the third spacer element to the object side surface of the fourth spacer element satisfy the following relationship: 1.48≤|R7| / EP34<4.50.

[0016] Furthermore, the outer diameter D0m of the image-side end surface of the lens barrel, the outer diameter D0s of the object-side end surface of the lens barrel, and the effective focal length f of the optical imaging lens satisfy the following relationship: 0.06≤|D0m-D0s| / f<1.70.

[0017] Furthermore, the inner diameter d0m of the image side end surface of the lens barrel, the curvature radius R10 of the image side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: 0.15≤d0m / (R10 f5)<1.68.

[0018] Furthermore, an outer diameter D0m of the image-side end surface of the lens barrel, an inner diameter d0m of the image-side end surface of the lens barrel, and a center distance BFL from the image-side surface of the fifth lens element to the imaging plane of the optical imaging lens on the optical axis of the optical imaging lens satisfy the following relationship: 0.60<(D0m-d0m) / BFL<3.15.

[0019] Furthermore, the sum ΣCT of the center thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, the effective focal length f of the optical imaging lens, and the axial distance L from the object-side end surface to the image-side end surface of the lens barrel satisfy the following relationship: .

[0020] Furthermore, the spacer element group further includes a first spacer element disposed between the first lens and the second lens, wherein an outer diameter D1s of the object-side surface of the first spacer element, an inner diameter d1s of the object-side surface of the first spacer element, an effective focal length f1 of the first lens, and a refractive index n1 of the first lens satisfy the following relationship: .

[0021] Furthermore, the spacer element group further includes a first spacer element disposed between the first lens and the second lens, and the effective focal length f1 of the first lens and the inner diameter d1m of the image side surface of the first spacer element satisfy: -4.90≤f1 / d1m<-0.65.

[0022] Applying the technical solution of the present invention, the optical imaging lens of the present application is composed of a lens barrel and five lenses and a spacer element arranged in the lens barrel. By reasonably arranging the optical focal length and surface shape of the five lenses, the position of the third spacer element, and setting the optical imaging lens to meet 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, when controlling the inner diameter of the third spacer element and the optical focal length of the third lens, it is easy to cause non-effective light to be incident on the edge of the third lens and the fourth lens to generate new stray light, affecting the imaging quality. Therefore, the present application, by restricting Under the condition of ensuring that the third lens has sufficient light input, it can further ensure that the third spacer element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to fully exert its light converging effect, thereby improving the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A dimensioned diagram showing an optical imaging lens according to an optional embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of an optical imaging lens according to embodiment 1-1 of the present invention is shown;

[0026] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 1-2 of the present invention is shown;

[0027] Figure 4 Schematic diagrams showing the structures of optical imaging lenses according to embodiments 1-3 of the present invention are shown;

[0028] Figure 5 shows an axial chromatic aberration curve of the optical imaging lens according to the first embodiment of the present invention;

[0029] Figure 6 shows the astigmatism curve of the optical imaging lens according to the first embodiment of the present invention;

[0030] Figure 7 shows the distortion curve of the optical imaging lens according to the first embodiment of the present invention;

[0031] Figure 8 shows a magnification chromatic aberration curve of the optical imaging lens according to the first embodiment of the present invention;

[0032] Figure 9 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-1 of the present invention is shown;

[0033] Figure 10 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-2 of the present invention is shown;

[0034] Figure 11 A schematic structural diagram of an optical imaging lens according to Embodiment 2-3 of the present invention is shown;

[0035] Figure 12 shows an on-axis chromatic aberration curve of the optical imaging lens according to the second embodiment of the present invention;

[0036] Figure 13 shows the astigmatism curve of the optical imaging lens according to the second embodiment of the present invention;

[0037] Figure 14 shows the distortion curve of the optical imaging lens according to the second embodiment of the present invention;

[0038] Figure 15 shows a magnification chromatic aberration curve of the optical imaging lens according to the second embodiment of the present invention;

[0039] Figure 16 1. A schematic structural diagram of an optical imaging lens according to embodiment 3-1 of the present invention is shown;

[0040] Figure 17 A schematic structural diagram of an optical imaging lens according to embodiment 3-2 of the present invention is shown;

[0041] Figure 18 Schematic diagram of the structure of the optical imaging lens of Example 3-3 of the present invention is shown;

[0042] Figure 19 shows an axial chromatic aberration curve of the optical imaging lens according to the third embodiment of the present invention;

[0043] Figure 20 shows the astigmatism curve of the optical imaging lens according to the third embodiment of the present invention;

[0044] Figure 21 shows the distortion curve of the optical imaging lens according to the third embodiment of the present invention;

[0045] Figure 22 shows a magnification chromatic aberration curve of the optical imaging lens according to the third embodiment of the present invention;

[0046] Figure 23 The optical imaging lens of Example 1 satisfies 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and Stray light energy diagram when ;

[0047] Figure 24The optical imaging lens of solution 1 of the present application satisfies 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and Stray light energy diagram when ;

[0048] Figure 25 The optical imaging lens of solution 2 of the present application satisfies 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and Stray light energy diagram when ;

[0049] Figure 26 The optical imaging lens of Example 2 satisfies 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and Stray light energy diagram when .

[0050] The above drawings include the following reference numerals:

[0051] P0, lens barrel; E1, first lens; P1, first spacer; P1b, first auxiliary spacer; E2, second lens; P2, second spacer; P2b, second auxiliary spacer; E3, third lens; P3, third spacer; E4, fourth lens; P4, fourth spacer; E5, fifth lens; 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. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0054] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0055] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0056] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0057] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it indicates that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it indicates that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those skilled in the art, using the positive or negative R value (R refers to the radius of curvature of the paraxial region, typically the R value in the lens database in optical software) to determine whether it is convex or concave. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface. For the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0058] In this application, the object side refers to the side of an optical imaging lens facing the object (not shown in the figure), and the image side refers to the side of the optical imaging lens facing the imaging plane. Hereinafter, the object-side surface of a lens refers to the side of the lens facing the object (not shown in the figure), and the image-side surface of a lens refers to the side of the lens facing the imaging plane. In the schematic diagrams shown in this application, the left side is the object side, and the right side is the image side.

[0059] In order to solve the problem of increased stray light caused by unreasonable arrangement of lenses and spacer elements in the prior art five-element optical imaging lens, the present invention provides an optical imaging lens.

[0060] like Figures 1 to 26As shown, in an optional embodiment of the present application, the optical imaging lens includes a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group consists of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the first lens has negative optical power; the second lens has optical power, and the object side surface of the second lens is convex; the third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the fourth lens has optical power; the fifth lens has optical power; the spacer element group includes a lens disposed between the third lens and the first lens. A third spacer element is provided between the four lenses and in contact with the image-side surface of the third lens; wherein the relationship between the inner diameter d3s of the object-side surface of the third spacer element and the effective focal length f3 of the third lens satisfies the following: 0.85≤d3s / f3≤1.35; the relationship between the inner diameter d3m of the image-side surface of the third spacer element and the curvature radius R7 of the object-side surface of the fourth lens satisfies the following: 1.22<d3m / |R7|≤2.52; and the relationship between the outer diameter D3s of the object-side surface of the third spacer element, the inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R6 of the image-side surface of the third lens, and the refractive index n3 of the third lens satisfies the following: .

[0061] The optical imaging lens of the present application is composed of a lens barrel and five lenses and a spacer element arranged in the lens barrel. By reasonably arranging the optical focal length and surface shape of the five lenses, the position of the third spacer element, and setting the optical imaging lens to meet 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, when controlling the inner diameter of the third spacer element and the optical focal length of the third lens, it is easy to cause non-effective light to be incident on the edge of the third lens and the fourth lens to generate new stray light, affecting the imaging quality. Therefore, the present application adopts the constraint Under the condition of ensuring that the third lens has sufficient light input, it can further ensure that the third spacer element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to fully exert its light converging effect, thereby improving the imaging quality of the optical imaging lens.

[0062] It should be noted that ineffective light refers to light that does not participate in the imaging process. This includes light that enters the optical imaging lens but does not focus on the imaging surface, or light that is scattered, reflected, or absorbed within the optical imaging lens. Ineffective light can be caused by physical limitations of the design or by factors such as lens surface unevenness, dust, scratches, or uneven coatings.

[0063] In addition, refer to Table 1 below. Figures 23 to 26As shown, under the premise that the optical imaging lens satisfies 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, for example, d3s / f3=1.35 and d3m / |R7|=2.52 or d3s / f3=0.85 and d3m / |R7|=1.32, Figure 23 The optical imaging lens of Example 1 satisfies Stray light energy diagram when Figure 24 It shows that the optical imaging lens of solution 1 of the present application meets Stray light energy diagram when Figure 25 It shows that the optical imaging lens of solution 2 of the present application meets Stray light energy diagram when Figure 26 The optical imaging lens of Example 2 satisfies Stray light energy diagram when .

[0064] Depend on Figures 23 to 26 It can be seen that when the optical imaging lens meets or When the third spacer element can effectively intercept stray light, the refractive power of the third lens and the size of the spacer element are reasonably designed, the stray light energy is low and the performance is better. When the optical imaging lens meets the requirements of the third lens, the light will have a steeper trend after passing through the third lens, and more stray light will be generated through the third lens, resulting in poor overall performance. When the stray light energy is high, the overall performance is poor. It can be seen that when 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52 are satisfied and the control When the stray light energy is in the range of -2.75 to -0.81, the performance is the best. Therefore, this application adopts the constraints of 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and Under the condition of ensuring that the third lens has sufficient light input, it can further ensure that the third spacer element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to fully exert its light converging effect, thereby improving the imaging quality of the optical imaging lens.

[0065] Table 1

[0066]

[0067] In this embodiment, the spacer element assembly further includes a first spacer element positioned between the first lens and the second lens, a second spacer element positioned between the second lens and the third lens, and a fourth spacer element positioned between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens. The object-side surface of the second spacer element is in contact with the image-side surface of the second lens.

[0068] In this embodiment, the radius of curvature R2 of the image-side surface of the first lens element and the inner diameter d1s of the object-side surface of the first spacer element satisfy the following relationship: -5.05 < R2 / d1s < 0.95. This expression controls the radius of curvature of the image-side surface of the first lens element, ensuring the molding reliability of the first lens. It also limits the inner diameter of the object-side surface of the first spacer element, ensuring the diameter and divergence angle of light rays passing through the first lens, ensuring the amount of light entering the front end of the optical imaging lens, and thereby improving the brightness and quality of the image.

[0069] In this embodiment, the effective focal length f1 of the first lens and the inner diameter d0s of the object-side end surface of the lens barrel satisfy the following relationship: -1.85 < f1 / d0s ≤ -0.30. This expression can be used to control the inner diameter of the object-side end surface of the lens barrel and the effective focal length of the first lens, thereby appropriately controlling the front end size of the optical imaging lens and limiting the overall size of the optical imaging lens. This also ensures that the lens barrel can block non-effective light from entering the first lens, thereby maintaining the imaging quality of the optical imaging lens.

[0070] In this embodiment, the axial distance EP01 from the object side end face of the lens barrel to the object side face of the first spacer element and the outer diameter D0s of the object side end face of the lens barrel satisfy the following relationship: 0.15<EP01 / D0s<0.45. Through this expression, the axial distance from the object side end face of the lens barrel to the object side face of the first spacer element and the outer diameter of the object side end face of the lens barrel can be controlled, thereby effectively controlling the shape and size of the first lens, such as the outer diameter, edge thickness and sagitta, which is beneficial to the molding of the first lens, thereby improving the manufacturing yield and optical performance of the first lens. At the same time, it is also beneficial to control the wall thickness of the lens barrel, ensuring the miniaturization of the optical imaging lens while ensuring the stable molding of the lens barrel. Among them, the sagitta is the on-axis spacing distance between the intersection of the surface of the lens and the optical axis to the effective radius vertex of the surface of the lens.

[0071] In this embodiment, the central thickness CT2 of the second lens element on the optical axis of the optical imaging lens, the axial distance EP12 from the image-side surface of the first spacer element to the object-side surface of the second spacer element, and the inner diameter d2s of the object-side surface of the second spacer element satisfy the following equation: 0.30 ≤ (CT2 + EP12) / d2s < 1.40. This expression allows the inner diameter of the object-side surface of the second spacer element to be controlled, ensuring that the second spacer element effectively intercepts stray light passing through the second lens while not affecting the stable passage of imaging light, thereby improving the final image quality. Furthermore, since the object-side surface of the second lens is convex, controlling the central thickness of the second lens ensures an appropriate sagittal height of the second lens, facilitating the formation of the second lens.

[0072] In this embodiment, the air gap T23 between the image-side surface of the second lens element and the object-side surface of the third lens element on the optical axis of the optical imaging lens, the outer diameter D2s of the object-side surface of the second spacer element, and the maximum axial thickness CP2 of the second spacer element satisfy the following conditions: The object-side surface of the third lens is convex. By controlling this expression, it is possible to effectively ensure an appropriate air gap between the second and third lenses, avoiding the risk of contact or interference between the second and third lenses due to a too small gap during assembly.

[0073] In this embodiment, the outer diameter D3s of the object-side surface of the third spacer, the inner diameter d3s of the object-side surface of the third spacer, the outer diameter D4s of the object-side surface of the fourth spacer, and the inner diameter d4s of the object-side surface of the fourth spacer satisfy the following relationship: 0.40 < (D3s - d3s) / (D4s - d4s) < 1.05. This expression allows the difference between the outer and inner diameters of the object-side surfaces of the third and fourth spacer elements to be controlled, thereby ensuring the assembly stability of the lens and spacer elements in the middle portion of the optical imaging lens, ensuring the structural reliability of the optical imaging lens, and helping to reduce stray light generated when light passes through the third lens, ensuring uniform light focus and reducing light divergence, thereby improving focusing accuracy and image clarity.

[0074] In this embodiment, the maximum axial thickness CP3 of the third spacer, the air spacing T34 on the optical axis of the optical imaging lens from the image side surface of the third lens to the object side surface of the fourth lens, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following equation: 0.03 ≤ CP3 / (T34 + CT4) < 1.10. This expression allows the center thickness of the fourth lens on the optical axis to be controlled within a reasonable range, while also ensuring uniform thickness of the third spacer, ensuring assembly precision of the third and fourth lenses, and thereby improving the structural stability of the optical imaging lens.

[0075] In this embodiment, the radius of curvature R7 of the object-side surface of the fourth lens element and the axial distance EP34 from the image-side surface of the third spacer element to the object-side surface of the fourth spacer element satisfy the following relationship: 1.48 ≤ |R7| / EP34 < 4.50. This expression allows the radius of curvature of the object-side surface of the fourth lens element and the axial distance from the image-side surface of the third spacer element to the object-side surface of the fourth spacer element to be controlled, ensuring that the edge thickness of the fourth lens is within a reasonable range. Furthermore, by adjusting the radius of curvature of the object-side surface of the fourth lens element, the sag height of the fourth lens is controlled, which helps improve the uniformity of the thickness of the fourth lens element, thereby ensuring the molding yield.

[0076] In this embodiment, the outer diameter D0m of the image-side end surface of the lens barrel, the outer diameter D0s of the object-side end surface of the lens barrel, and the effective focal length f of the optical imaging lens satisfy the following relationship: 0.06 ≤ |D0m-D0s| / f < 1.70. This expression allows the outer diameters of the object-side end surface of the lens barrel to be as close as possible to the outer diameters of the image-side end surface of the lens barrel, which facilitates the molding of the lens barrel. It also allows the maximum length of the lens barrel to be designed to match the incident light trajectory of the optical imaging lens. While ensuring that the lens barrel does not block incident light, it ensures that the lens barrel has sufficient thickness at the contact point with the object-side surface of the first lens element, thereby ensuring the structural strength of the lens barrel and improving the assembly stability of the optical imaging lens.

[0077] In this embodiment, the inner diameter d0m of the image-side end surface of the lens barrel, the curvature radius R10 of the image-side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: This expression can be used to control the radius of curvature of the image-side surface of the fifth lens and the effective focal length of the fifth lens. This optimizes the imaging performance of the optical imaging lens while ensuring the good molding of the fifth lens. Furthermore, by limiting the inner diameter of the image-side end surface of the lens barrel, the rear-end dimensions are controlled, thereby ensuring the miniaturization of the optical imaging lens. Furthermore, constraining this expression can also reserve sufficient space for dispensing glue for subsequent assembly, thus ensuring both the stability and imaging performance of the optical imaging lens.

[0078] In this embodiment, the outer diameter D0m of the image side end surface of the lens barrel, the inner diameter d0m of the image side end surface of the lens barrel, and the center distance BFL from the image side surface of the fifth lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens satisfy the following relationship: 0.60<(D0m-d0m) / BFL<3.15. Through this expression, the center distance from the image side surface of the fifth lens to the imaging surface of the optical imaging lens on the optical axis can be controlled, thereby increasing the degree of freedom of placement of subsequent optical filters. At the same time, by controlling the difference between the outer diameter and the inner diameter of the image side end surface of the lens barrel, the thickness of the lens barrel and the rear end size of the optical imaging lens can be effectively controlled. In addition, constraining this formula can also effectively control the range of the edge emission light of the fifth lens, so that the rear end of the lens barrel can block edge stray light, thereby improving the imaging quality of the optical imaging lens.

[0079] In this embodiment, the sum ΣCT of the center thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, the effective focal length f of the optical imaging lens, and the axial distance L from the object-side end surface to the image-side end surface of the lens barrel satisfy the following relationship: This expression can effectively balance the center thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens while ensuring the effective focal length of the optical imaging lens. Furthermore, by controlling the axial height of the optical imaging lens, stray light anomalies can be effectively reduced while ensuring the miniaturization of the optical imaging lens.

[0080] In this embodiment, the outer diameter D1s of the object-side surface of the first spacer element, the inner diameter d1s of the object-side surface of the first spacer element, the effective focal length f1 of the first lens, and the refractive index n1 of the first lens satisfy: This expression can be used to control the difference between the outer diameter and inner diameter of the object-side surface of the first spacer element, ensuring the bearing length of the object-side surface of the first spacer element relative to the image-side surface of the first lens, thereby ensuring the assembly stability of the optical imaging lens. Furthermore, by controlling the effective focal length and refractive index of the first lens, the first spacer element can be used to block stray light, thereby improving the stray light yield of the optical imaging lens.

[0081] In this embodiment, the effective focal length f1 of the first lens and the inner diameter d1m of the image-side surface of the first spacer element satisfy the following relationship: -4.90 ≤ f1 / d1m < -0.65. This expression allows the effective focal length of the first lens to be controlled, facilitating control of the path of light passing through the first lens and reducing the sensitivity of the first lens. It also allows the inner diameter of the image-side surface of the first spacer element to be controlled, helping the first spacer element block non-effective light and prevent stray light, thereby improving the imaging quality of the optical imaging lens.

[0082] Optionally, the optical imaging lens in the embodiments of the present application can be simulated using software and / or tools such as ZEMAX and CODEV. During the simulation using such software and / or tools, the surface profile of each lens can be appropriately adjusted based on the surface profiles inherent in the software and / or tools used.

[0083] In addition, in another optional embodiment of the present application, an optical imaging lens is also provided, including a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the first lens has negative optical power; the second lens has optical power, and the object side surface of the second lens is convex; the third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the fourth lens has optical power; the fifth lens has optical power; the spacer element group includes 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 spacer element placed on the fourth lens a fourth spacer element between the fifth lens and the image side surface of the fourth lens; wherein, an inner diameter d3s of the object side surface of the third spacer element and the effective focal length f3 of the third lens satisfy the following relationship: 0.85≤d3s / f3≤1.35; an inner diameter d3m of the image side surface of the third spacer element and the curvature radius R7 of the object side surface of the fourth lens satisfy the following relationship: 1.22<d3m / |R7|≤2.52; an outer diameter D3s of the object side surface of the third spacer element, an inner diameter d3s of the object side surface of the third spacer element, an outer diameter D4s of the object side surface of the fourth spacer element and an inner diameter d4s of the object side surface of the fourth spacer element satisfy the following relationship: 0.40<(D3s-d3s) / (D4s-d4s)<1.05.

[0084] The optical imaging lens of the present application is composed of a lens barrel and five lenses and a spacer element arranged in the lens barrel. By reasonably arranging the optical power and surface shape of the five lenses, the positions of the third spacer element and the fourth spacer element, and setting the optical imaging lens to meet 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, by controlling the inner diameter of the third spacer element and the optical power of the third lens, it is easy to cause non-effective light to be incident on the edges of the third lens and the fourth lens to generate new stray light, affecting the imaging quality. Therefore, the present application can control the difference in inner and outer diameters of the object side of the third spacer element and the fourth spacer element by constraining 0.40<(D3s-d3s) / (D4s-d4s)<1.05, which helps to reduce the stray light generated when the light passes through the third lens, ensure that the light can be evenly focused, reduce the divergence of the light, and thus improve the focusing accuracy and imaging clarity. It can also ensure the assembly stability of the third lens of the optical imaging lens and ensure the structural reliability of the optical imaging lens.

[0085] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0086] Optionally, the optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0087] The optical imaging lens in this application may utilize multiple lenses, such as the five lenses described above. In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously changing curvature from the center of the lens to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a better curvature radius characteristic, with the advantages of improving distortion aberration and astigmatism. By using aspheric lenses, aberrations that occur during imaging can be eliminated as much as possible, thereby improving image quality.

[0088] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe an optical imaging lens using five lenses as an example, the optical imaging lens is not limited to including five lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0089] Figure 1 A dimension diagram of an optical imaging lens according to an optional embodiment of the present invention is shown. Figure 1 Parameters such as d1s, d1m, D1s, d2s, D2s, d3s, d3m, D3s, d4s, D4s, EP01, EP12, CP2, CP3, EP34, d0s, d0m, D0s, D0m, and L are indicated to provide a clear and intuitive understanding of their meaning. To facilitate the description of the optical imaging lens and specific lens surface shapes, these parameters will not be shown in the accompanying drawings when describing specific embodiments.

[0090] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0091] It should be noted that in the following Example 1, there are three examples: Example 1-1, Example 1-2, and Example 1-3; in Example 2, there are three examples: Example 2-1, Example 2-2, and Example 2-3; and in Example 3, there are three examples: Example 3-1, Example 3-2, and Example 3-3. While the parameters of the optical imaging lens, such as the radius of curvature and center thickness of the first through fifth lenses, as well as the spacing between the lenses and the higher-order coefficients, are the same in the three examples of the same embodiment, the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel and the spacing elements are different.

[0092] It should be noted that any one of the following examples 1 to 3 is applicable to all implementation methods of the present application.

[0093] Example 1

[0094] like Figures 2 to 8 As shown, the optical imaging lens of embodiment 1 is described. Figure 2 1-1 shows a schematic structural diagram of the optical imaging lens of Example 1-1. Figure 3 Schematic diagram of the structure of the optical imaging lens of Example 1-2 is shown. Figure 4 Schematic diagrams of the structures of the optical imaging lenses of Examples 1-3 are shown.

[0095] like Figures 2 to 4 As shown, the optical imaging lens includes 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, and a fifth lens E5, which are arranged in sequence from the object side to the image side in the lens barrel P0.

[0096] like Figure 2 , which is a schematic diagram of the structure of the optical imaging lens of Example 1-1. In this example, the object-side surface and image-side surface of the first spacer element P1 are in contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer element P2 are in contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer element P3 are in contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer element P4 are in contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively.

[0097] like Figure 3 FIG2 is a schematic diagram of the structure of the optical imaging lens of Example 1-2. The contact method of each spacer element in this example is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to and will not be repeated here.

[0098] like Figure 4 FIG2 is a schematic diagram of the structure of the optical imaging lens of Example 1-3. The contact method of each spacer element in this example is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to and will not be repeated here.

[0099] In summary, the structural parameters of the optical imaging lens of Example 1 in Examples 1-1, 1-2, and 1-3 are shown in Table 2.

[0100] Table 2

[0101]

[0102] In Example 1, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is convex. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex.

[0103] In Example 1, the total optical length TTL of the optical imaging lens is 5.40 mm, the image height ImgH corresponding to the maximum field of view of the optical imaging lens is 2.00 mm, half the maximum field of view HFOV of the optical imaging lens is 55.00°, the aperture number Fno of the optical imaging lens is 2.04, the effective focal length f of the optical imaging lens is 2.27 mm, the distance TD from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis of the optical imaging lens is 4.54 mm, the effective focal length f1 of the first lens is -6.27 mm, the effective focal length f2 of the second lens is -9.52 mm, the effective focal length f3 of the third lens is 3.01 mm, the effective focal length f4 of the fourth lens is 2.28 mm, and the effective focal length f5 of the fifth lens is -3.30 mm.

[0104] Table 3 shows the basic structural parameters of the optical imaging lens of Example 1, where the units for the radius of curvature and thickness / distance are all in millimeters. In the table below, OBJ (not shown) represents the object distance. STO (not shown) represents the aperture stop, located between the first lens element E1 and the second lens element E2. S11 and S12 (not shown) can represent the object-side and image-side surfaces of a filter or the object-side and image-side surfaces of a protective glass. S13 (not shown) represents the imaging surface.

[0105] Table 3

[0106]

[0107] In Example 1, the object-side surface and the image-side surface of the first lens E1 to the fifth lens E5 are all aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0108] Formula (1).

[0109] Where x is the distance from the vertex of the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 3 above; k is the conic coefficient; and Ai is the i-th order correction coefficient for the aspheric surface. Table 4 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspheric lens surface S1-S10 in Example 1.

[0110] Table 4

[0111]

[0112] Figure 5 The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 7 The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion values corresponding to different image heights. Figure 8 The chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0113] according to Figures 5 to 8 It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0114] Example 2

[0115] like Figures 9 to 15 As shown, the optical imaging lens of the second embodiment is described. Figure 9 FIG2 shows a schematic structural diagram of the optical imaging lens of Example 2-1. Figure 10 FIG2 shows a schematic structural diagram of the optical imaging lens of Example 2-2. Figure 11 A schematic structural diagram of the optical imaging lens of Example 2-3 is shown.

[0116] like Figures 9 to 11 As shown, the optical imaging lens includes 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, and a fifth lens E5, which are arranged in sequence from the object side to the image side in the lens barrel P0.

[0117] like Figure 9, which is a schematic structural diagram of the optical imaging lens of Example 2-1. In this example, the object-side surface and image-side surface of the first spacer element P1 are in contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer element P2 are in contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer element P3 are in contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer element P4 are in contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively.

[0118] like Figure 10 FIG2 is a schematic structural diagram of an optical imaging lens according to Example 2-2. The difference from Example 2-1 is that a first auxiliary spacer P1b is further provided on the image side of the first spacer P1, and a second auxiliary spacer P2b is further provided on the image side of the second spacer P2. In this case, the image-side surface of the first spacer P1 contacts the object-side surface of the first auxiliary spacer P1b, the image-side surface of the first auxiliary spacer P1b contacts the object-side surface S3 of the second lens element, the image-side surface of the second spacer P2 contacts the object-side surface of the second auxiliary spacer P2b, and the image-side surface of the second auxiliary spacer P2b contacts the object-side surface S5 of the third lens element. The contact method of the remaining spacer elements in this example is the same as that in Example 2-1, and reference may be made to the relevant description in Example 2-1, which will not be repeated here.

[0119] like Figure 11 Figure 2 shows the structure of the optical imaging lens of Example 2-3. Unlike Example 2-1, the inner annular surface of the lens barrel P0 includes an abutment portion extending toward the optical axis. The image-side surface of the first spacer element P1 contacts the abutment portion, while the object-side surface S3 of the second lens element contacts the abutment portion. The presence of the abutment portion improves the assembly stability of the front lens. The contact structure of the remaining spacer elements in this example is the same as that in Example 2-1. Please refer to the relevant description in Example 2-1 and will not be repeated here.

[0120] In summary, the structural parameters of the optical imaging lens of Example 2 in Example 2-1, Example 2-2, and Example 2-3 are shown in Table 5.

[0121] Table 5

[0122]

[0123] In Example 2, the object-side surface S1 of the first lens is concave, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex.

[0124] In Example 2, the total optical length TTL of the optical imaging lens is 5.62 mm, the image height ImgH corresponding to the maximum field of view of the optical imaging lens is 1.00 mm, half the maximum field of view HFOV of the optical imaging lens is 55.00°, the aperture number Fno of the optical imaging lens is 2.04, the effective focal length f of the optical imaging lens is 0.82 mm, the distance TD from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis of the optical imaging lens is 4.65 mm, the effective focal length f1 of the first lens is -1.46 mm, the effective focal length f2 of the second lens is -109.59 mm, the effective focal length f3 of the third lens is 2.05 mm, the effective focal length f4 of the fourth lens is 1.14 mm, and the effective focal length f5 of the fifth lens is -1.51 mm.

[0125] Table 6 shows the basic structural parameters of the optical imaging lens of Example 2, where the units for the radius of curvature and thickness / distance are all in millimeters. In the table below, OBJ (not shown) represents the object distance. STO (not shown) represents the aperture stop, located between the first lens element E1 and the second lens element E2. S11 and S12 (not shown) can represent the object-side and image-side surfaces of a filter or the object-side and image-side surfaces of a protective glass. S13 (not shown) represents the imaging surface.

[0126] Table 6

[0127]

[0128] Table 7 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspheric lens surfaces S1-S10 in Example 2. The surface shape of each aspheric lens is defined according to formula (1) in Example 1.

[0129] Table 7

[0130]

[0131] Figure 12 The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 13The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 14 The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion values corresponding to different image heights. Figure 15 The chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0132] according to Figures 12 to 15 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0133] Example 3

[0134] like Figures 16 to 22 As shown, the optical imaging lens of Example 3 is described. Figure 16 FIG3 shows a schematic structural diagram of the optical imaging lens of Example 3-1. Figure 17 FIG3 shows a schematic structural diagram of the optical imaging lens of Example 3-2. Figure 18 A schematic structural diagram of the optical imaging lens of Example 3-3 is shown.

[0135] like Figures 16 to 18 As shown, the optical imaging lens includes 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, and a fifth lens E5, which are arranged in sequence from the object side to the image side in the lens barrel P0.

[0136] like Figure 16 , which is a schematic structural diagram of the optical imaging lens of Example 3-1. In this example, the object-side surface and image-side surface of the first spacer element P1 are in contact with the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side surface and image-side surface of the second spacer element P2 are in contact with the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side surface and image-side surface of the third spacer element P3 are in contact with the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side surface and image-side surface of the fourth spacer element P4 are in contact with the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively.

[0137] like Figure 17 FIG3 is a schematic diagram of the structure of the optical imaging lens of Example 3-2. The contact method of the spacer elements in this example is the same as that of Example 3-1. Please refer to the relevant description of Example 3-1 and will not be repeated here.

[0138] like Figure 18Figure 3-3 is a schematic structural diagram of the optical imaging lens system of Example 3-3. Unlike Example 3-1, the inner annular surface of the lens barrel P0 includes an abutment portion extending toward the optical axis. The image-side surface S2 of the first lens element contacts the abutment portion, as does the object-side surface of the first spacer element P1. The presence of the abutment portion enhances the assembly stability of the front lens. The contact structure of the remaining spacer elements in this example is the same as in Example 3-1. Please refer to the relevant description in Example 3-1 and will not be repeated here.

[0139] In summary, the structural parameters of the optical imaging lens of Example 3 in Example 3-1, Example 3-2, and Example 3-3 are shown in Table 8.

[0140] Table 8

[0141]

[0142] In Example 3, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is concave, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave.

[0143] In Example 3, the total optical length TTL of the optical imaging lens is 6.19 mm, the image height ImgH corresponding to the maximum field of view of the optical imaging lens is 1.02 mm, half the maximum field of view HFOV of the optical imaging lens is 55.00°, the aperture number Fno of the optical imaging lens is 2.04, the effective focal length f of the optical imaging lens is 1.37 mm, the distance TD from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis of the optical imaging lens is 5.21 mm, the effective focal length f1 of the first lens is -2.05 mm, the effective focal length f2 of the second lens is 3.07 mm, the effective focal length f3 of the third lens is 1.67 mm, the effective focal length f4 of the fourth lens is -1.86 mm, and the effective focal length f5 of the fifth lens is 7.48 mm.

[0144] Table 9 shows the basic structural parameters of the optical imaging lens of Example 3, where the units for the radius of curvature and thickness / distance are all in millimeters. In the table below, OBJ (not shown) represents the object distance. STO (not shown) represents the aperture stop, located between the first lens element E1 and the second lens element E2. S11 and S12 (not shown) can represent the object-side and image-side surfaces of a filter or the object-side and image-side surfaces of a protective glass. S13 (not shown) represents the imaging surface.

[0145] Table 9

[0146]

[0147] Table 10 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspheric lens surfaces S1-S10 in Example 3. The surface shape of each aspheric lens is defined according to formula (1) in Example 1.

[0148] Table 10

[0149]

[0150] Figure 19 The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 20 The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 21 The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion values corresponding to different image heights. Figure 22 The chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical imaging lens.

[0151] according to Figures 19 to 22 It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0152] In summary, Examples 1 to 3 respectively satisfy the relationships shown in Table 11.

[0153] Table 11

[0154]

[0155] Table 12 shows parameters such as half the maximum field of view HFOV of the optical imaging lens of Examples 1 to 3, the total optical length TTL of the optical imaging lens, and the effective focal length f of the optical imaging lens.

[0156] Table 12

[0157]

[0158] This application also provides an optical device, whose electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The optical device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The optical device is equipped with the optical imaging lens described above.

[0159] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0160] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0161] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0162] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that: comprising a lens barrel and a lens group and a spacer element group arranged in the lens barrel, The lens group is composed of five lenses, and the five lenses are, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens; the first lens has negative optical power; the second lens has optical power, and the object-side surface of the second lens is convex; the third lens has positive optical power, and the object-side surface of the third lens is convex, and the image-side surface of the third lens is convex; the fourth lens has optical power; and the fifth lens has optical power; The spacer element group includes 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; The relationship between the inner diameter d3s of the object-side surface of the third spacer element and the effective focal length f3 of the third lens satisfies: 0.85≤d3s / f3≤1.35; the relationship between the inner diameter d3m of the image-side surface of the third spacer element and the curvature radius R7 of the object-side surface of the fourth lens satisfies: 1.22<d3m / |R7|≤2.52; the relationship between the outer diameter D3s of the object-side surface of the third spacer element, the inner diameter d3s of the object-side surface of the third spacer element, the curvature radius R6 of the image-side surface of the third lens, and the refractive index n3 of the third lens satisfies: .

2. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element disposed between the first lens and the second lens, A curvature radius R2 of the image-side surface of the first lens and an inner diameter d1s of the object-side surface of the first spacer element satisfy the following: -5.05<R2 / d1s<0.

95.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens and the inner diameter d0s of the object-side end surface of the lens barrel satisfy the following relationship: -1.85<f1 / d0s≤-0.

30.

4. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element disposed between the first lens and the second lens, An axial distance EP01 from the object-side end surface of the lens barrel to the object-side surface of the first spacer element and an outer diameter D0s of the object-side end surface of the lens barrel satisfy the following relationship: 0.15<EP01 / D0s<0.

45.

5. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element disposed between the first lens and the second lens, and a second spacer element disposed between the second lens and the third lens. The central thickness CT2 of the second lens on the optical axis of the optical imaging lens, the axial distance EP12 from the image side surface of the first spacer element to the object side surface of the second spacer element, and the inner diameter d2s of the object side surface of the second spacer element satisfy the following: 0.30≤(CT2+EP12) / d2s<1.

40.

6. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a second spacer element disposed between the second lens and the third lens, The air gap T23 on the optical axis of the optical imaging lens from the image-side surface of the second lens to the object-side surface of the third lens, the outer diameter D2s of the object-side surface of the second spacer element, and the maximum axial thickness CP2 of the second spacer element satisfy the following conditions: .

7. The optical imaging lens according to claim 1, wherein: The spacer element group further includes 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. An outer diameter D3s of the object-side surface of the third spacer element, an inner diameter d3s of the object-side surface of the third spacer element, an outer diameter D4s of the object-side surface of the fourth spacer element, and an inner diameter d4s of the object-side surface of the fourth spacer element satisfy the following relationship: 0.40<(D3s-d3s) / (D4s-d4s)<1.

05.

8. The optical imaging lens according to claim 1, wherein: The maximum axial thickness CP3 of the third spacer element, the air space T34 between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis of the optical imaging lens, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following: 0.03≤CP3 / (T34+CT4)<1.

10.

9. The optical imaging lens according to claim 1, wherein: The spacer element group further includes 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 curvature radius R7 of the object-side surface of the fourth lens and an axial distance EP34 from the image-side surface of the third spacer element to the object-side surface of the fourth spacer element satisfy the following: 1.48≤|R7| / EP34<4.

50.

10. The optical imaging lens according to claim 1, wherein: The outer diameter D0m of the image-side end surface of the lens barrel, the outer diameter D0s of the object-side end surface of the lens barrel, and the effective focal length f of the optical imaging lens satisfy the following relationship: 0.06≤|D0m-D0s| / f<1.

70.

11. The optical imaging lens according to claim 1, wherein: The inner diameter d0m of the image side end surface of the lens barrel, the curvature radius R10 of the image side surface of the fifth lens, and the effective focal length f5 of the fifth lens satisfy the following relationship: .

12. The optical imaging lens according to claim 1, wherein: The outer diameter D0m of the image-side end surface of the lens barrel, the inner diameter d0m of the image-side end surface of the lens barrel, and the center distance BFL from the image-side surface of the fifth lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens satisfy the following relationship: 0.60<(D0m-d0m) / BFL<3.

15.

13. The optical imaging lens according to claim 1, wherein: The sum ΣCT of the center thicknesses of the first to fifth lenses on the optical axis of the optical imaging lens, the effective focal length f of the optical imaging lens, and the axial distance L from the object-side end surface of the lens barrel to the image-side end surface of the lens barrel satisfy the following conditions: .

14. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element disposed between the first lens and the second lens, The outer diameter D1s of the object-side surface of the first spacer element, the inner diameter d1s of the object-side surface of the first spacer element, the effective focal length f1 of the first lens, and the refractive index n1 of the first lens satisfy the following relationship: .

15. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element disposed between the first lens and the second lens, The effective focal length f1 of the first lens and the inner diameter d1m of the image-side surface of the first spacer element satisfy the following: -4.90≤f1 / d1m<-0.65.

Images