Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a spacing element group, the lens group and the spacing element group are arranged in the lens barrel, the lens group is composed of five lenses, and the five lenses are sequentially a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side; d3s / f3 is more than or equal to 0.85 and less than or equal to 1.35; d3m / R7 is more than 1.22 and less than or equal to 2.52; the formula is as follows: # imgabs0 #. The five-piece optical imaging lens solves the problem that stray light is increased due to the fact that lenses and spacing elements are reasonably arranged in a five-piece optical imaging lens in the prior art.

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 market demand for portable electronic products continues to grow as they become increasingly popular, especially electronic devices with camera functions. These electronic devices usually integrate advanced camera functions to meet users' needs 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 good optical performance.

[0003] At present, in order to meet the requirement of sufficient light intake and ensure image quality in poor lighting conditions or with hand shaking, the five-element optical imaging lens used in portable electronic devices usually controls the size of the lens or spacer element in the optical imaging lens. However, in this case, ineffective light incident on the edge of some lenses is likely to generate new stray light, affecting the 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 spacing 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 that the five-piece optical imaging lens in the prior art has unreasonable arrangement of lenses and spacing elements, thereby causing an increase in stray light.

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

[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 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 in order; the first lens has negative optical power; the second lens has optical power, and the object side surface of the second lens is a convex surface; the third lens has positive optical power, and the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has optical power; the fifth lens has optical power; the spacer element group comprises 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, and a spacer element disposed between the fourth lens and the fifth lens. a fourth spacing 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 spacing element and the effective focal length f3 of the third lens satisfy: 0.85≤d3s / f3≤1.35; an inner diameter d3m of the image side surface of the third spacing element and the curvature radius R7 of the object side surface of the fourth lens satisfy: 1.22<d3m / |R7|≤2.52; an outer diameter D3s of the object side surface of the third spacing element, an inner diameter d3s of the object side surface of the third spacing element, an outer diameter D4s of the object side surface of the fourth spacing element and an inner diameter d4s of the object side surface of the fourth spacing element satisfy: 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: -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 placed between the first lens and the second lens, and a second spacer element placed 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: 0.30≤(CT2+EP12) / d2s<1.40.

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

[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: 0.40<(D3s-d3s) / (D4s-d4s)<1.05.

[0014] Further, the maximum axial thickness CP3 of the third spacing element, the air space T34 from the image side surface of the third lens to 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: 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: 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 to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens satisfy: 0.60<(D0m-d0m) / BFL<3.15.

[0019] Furthermore, the sum ΣCT of the center thicknesses of the first lens to the fifth lens 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: .

[0020] Furthermore, the spacer element group further includes a first spacer element disposed between the first lens and the second lens, and 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: .

[0021] Furthermore, the spacer element group also 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] By applying the technical solution of the present invention, the optical imaging lens of the present application is composed of a lens barrel, five lenses and a spacing 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 spacing element, and setting the optical imaging lens to meet 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, when the inner diameter of the third spacing element and the optical focal length of the third lens are controlled, it is easy to cause new stray light to be generated when the ineffective light is incident on the edge of the third lens and the fourth lens, thereby 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 spacing element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to give full play to its light convergence effect, thereby improving the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[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 A schematic structural diagram of an optical imaging lens according to Embodiments 1 to 3 of the present invention is 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 an 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 of the first embodiment of the present invention;

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

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

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

[0035] Fig.12 shows an axial chromatic aberration curve of the optical imaging lens of the second embodiment of the present invention;

[0036] Fig.13 shows the astigmatism curve of the optical imaging lens of the second embodiment of the present invention;

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

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

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

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

[0041] Fig.18 A schematic structural diagram of an optical imaging lens according to Embodiment 3-3 of the present invention is shown;

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

[0043] Fig. 20 shows the astigmatism curve of the optical imaging lens of the third embodiment of the present invention;

[0044] Fig.21 shows the distortion curve of the optical imaging lens of the third embodiment of the present invention;

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

[0046] Fig.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] Fig.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] Fig.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] Fig.26 The optical imaging lens of Example 2 satisfies 0.85≤d3s / f3≤1.35, 1.22<d3m / |R7|≤2.52 and The stray light energy diagram when

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

[0051] P0, lens barrel; E1, first lens; P1, first spacing element; P1b, first auxiliary spacing element; E2, second lens; P2, second spacing element; P2b, second auxiliary spacing element; E3, third lens; P3, third spacing element; E4, fourth lens; P4, fourth spacing element; 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 in the embodiments of the present 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 meanings 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 directions; 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-mentioned directional words are not used to limit the present invention.

[0055] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

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

[0057] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the concave and convex. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0058] In this application, the object side refers to the side of the optical imaging lens facing the object to be photographed (not shown in the figure), and the image side refers to the side of the optical imaging lens facing the imaging surface. In the following, the object side of the lens refers to the side surface of the lens facing the object to be photographed (not shown in the figure), and the image side of the lens refers to the side surface of the lens facing the imaging surface. In the structural schematic diagram 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 that the lenses and spacing elements of the five-piece optical imaging lens in the prior art are not properly arranged, thereby causing an increase in stray light, 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 comprises 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 a convex surface; the third lens has positive optical power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; 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 spacing 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 spacing 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 spacing 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 spacing element, the inner diameter d3s of the object side surface of the third spacing element, the curvature radius R6 of the image side surface of the third lens and the refractive index n3 of the third lens satisfies: .

[0061] The optical imaging lens of the present application is composed of a lens barrel, five lenses and a spacing element arranged in the lens barrel. By reasonably arranging the optical power and surface shape of the five lenses, the position of the third spacing element, and setting the optical imaging lens to meet 0.85≤d3s / f3≤1.35 and 1.22<d3m / |R7|≤2.52, when the inner diameter of the third spacing element and the optical power of the third lens are controlled, it is easy to cause new stray light to be generated when the ineffective light is incident on the edge of the third lens and the fourth lens, 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 spacing element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to give full play to its light convergence 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 inside the optical imaging lens. Ineffective light can be caused by physical limitations of the design, or by factors such as uneven lens surface, dust, scratches, or uneven coating.

[0063] In addition, refer to the following table 1, Figure 23 to Figure 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, Fig.23 The optical imaging lens of Example 1 satisfies The stray light energy diagram at Fig.24 It shows that the optical imaging lens of solution 1 of the present application satisfies The stray light energy diagram at Fig.25 It shows that the optical imaging lens of scheme 2 of the present application satisfies The stray light energy diagram at Fig.26 The optical imaging lens of Example 2 satisfies The stray light energy diagram when

[0064] Depend on Figure 23 to Figure 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 it is in the range of -2.75 to -0.81, the stray light energy is low and the performance is optimal. Therefore, this application constrains 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 spacing element can block excess stray light, and at the same time, it is beneficial for the third lens of the optical imaging lens to give full play to its light convergence effect, thereby improving the imaging quality of the optical imaging lens.

[0065] Table 1

[0066]

[0067] In this embodiment, the spacer element group further includes a first spacer element disposed between the first lens and the second lens, a second spacer element disposed between the second lens and the third lens, and 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, wherein 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 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 spacing element satisfy: -5.05<R2 / d1s<0.95. Through this expression, the curvature radius of the image side surface of the first lens can be controlled to ensure the molding reliability of the first lens, while limiting the inner diameter of the object side surface of the first spacing element, and also ensuring the diameter and divergence angle of the light after passing through the first lens, ensuring the amount of light entering the front end of the optical imaging lens, thereby improving the imaging brightness and quality of the optical imaging lens.

[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: -1.85<f1 / d0s≤-0.30. Through this expression, the inner diameter of the object side end surface of the lens barrel and the effective focal length of the first lens can be controlled, thereby controlling the front end size of the optical imaging lens to be appropriate, thereby limiting the overall size of the optical imaging lens, and at the same time ensuring that the lens barrel can block non-effective light from entering the first lens, thereby ensuring 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 spacing element and the outer diameter D0s of the object side end face of the lens barrel satisfy: 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 spacing 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 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: 0.30≤(CT2+EP12) / d2s<1.40. Through this expression, the inner diameter of the object side surface of the second spacer element can be controlled to ensure that the second spacer element can effectively intercept the stray light passing through the second lens, while not affecting the stable passage of the imaging light, thereby improving the final imaging quality, and the object side surface of the second lens is a convex surface, and the center thickness of the second lens can be controlled to ensure that the sagittal height of the second lens is appropriate, which is conducive to the molding of the second lens.

[0072] In this embodiment, the air gap T23 between the image side surface of the second lens and the object side surface of the third lens 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: The object side surface of the third lens is convex. By controlling this expression, it is possible to effectively ensure that the air gap between the second lens and the third lens is appropriate, thereby avoiding the risk of contact or interference between the second lens and the third lens due to too small a 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: 0.40<(D3s-d3s) / (D4s-d4s)<1.05. Through this expression, the difference between the outer diameter and the inner diameter of the object side surface of the third spacer and the fourth spacer can be controlled, thereby ensuring the assembly stability of the lens and the spacer in the middle of the optical imaging lens, ensuring the structural reliability of the optical imaging lens, and at the same time helping to reduce the stray light generated when the light passes through the third lens, ensuring that the light can be evenly focused, reducing the divergence of the light, and thus improving the focusing accuracy and imaging clarity.

[0074] In this embodiment, the maximum axial thickness CP3 of the third spacer, the air space T34 from the image side surface of the third lens to 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: 0.03≤CP3 / (T34+CT4)<1.10. Through this expression, the center thickness of the fourth lens on the optical axis can be controlled within a reasonable range, and the thickness uniformity of the third spacer can be controlled, so as to ensure the assembly accuracy of the third lens and the fourth lens, 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 and the axial distance EP34 from the image side surface of the third spacing element to the object side surface of the fourth spacing element satisfy: 1.48≤|R7| / EP34<4.50. Through this expression, the radius of curvature of the object side surface of the fourth lens and the axial distance from the image side surface of the third spacing element to the object side surface of the fourth spacing element can be controlled to ensure that the edge thickness of the fourth lens is within a reasonable range, and by adjusting the radius of curvature of the object side surface of the fourth lens, the sagittal height of the fourth lens is controlled, which is conducive to improving the uniformity of the thickness of the fourth lens, 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: 0.06≤|D0m-D0s| / f<1.70. Through this expression, the outer diameter of the object side end surface of the lens barrel can be as close as possible to the outer diameter of the image side end surface of the lens barrel, which is conducive to the molding of the lens barrel, and at the same time, the maximum length of the lens barrel can be designed to match the incident light trend of the optical imaging lens, and under the condition of ensuring that the lens barrel does not block the incident light, it is ensured that the lens barrel has sufficient thickness at the contact position with the object side surface of the first lens, and the structural strength of the lens barrel is ensured, thereby 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: . Through this expression, the curvature radius of the image side surface of the fifth lens and the effective focal length of the fifth lens can be controlled. Under the premise of ensuring the good molding of the fifth lens, the imaging performance of the optical imaging lens is optimized. At the same time, the rear end size is controlled by limiting the inner diameter of the image side end surface of the lens barrel, thereby ensuring the miniaturization of the optical imaging lens. In addition, constraining this formula can also reserve sufficient dispensing space for subsequent assembly, which can ensure both the stability and imaging performance of the optical imaging lens.

[0078] In this embodiment, the outer diameter D0m of the image side end face of the lens barrel, the inner diameter d0m of the image side end face of the lens barrel, and the center distance BFL from the image side face of the fifth lens to the imaging surface of the optical imaging lens on the optical axis of the optical imaging lens satisfy: 0.60<(D0m-d0m) / BFL<3.15. Through this expression, the center distance from the image side face of the fifth lens to the imaging surface of the optical imaging lens on the optical axis can be controlled, thereby improving the degree of freedom of the placement position of the subsequent filter, and at the same time, by controlling the difference between the outer diameter and the inner diameter of the image side end face 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 the 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 lens to the fifth lens 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: Through this expression, the center thickness of the first lens to the fifth lens on the optical axis of the optical imaging lens can be effectively balanced and distributed under the premise of ensuring the effective focal length of the optical imaging lens. The axial height of the optical imaging lens can also be controlled to effectively reduce the abnormality of stray light under the premise of 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: Through this expression, the difference between the outer diameter and the inner diameter of the object side of the first spacer element can be controlled to ensure the bearing length of the object side of the first spacer element on the image side of the first lens, thereby ensuring the assembly stability of the optical imaging lens. At the same time, by controlling the effective focal length of the first lens and the refractive index of the first lens, it is beneficial for the first spacer element 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 spacing element satisfy: -4.90≤f1 / d1m<-0.65. Through this expression, the effective focal length of the first lens can be controlled, which is conducive to controlling the direction of light passing through the first lens and reducing the sensitivity of the first lens. At the same time, the inner diameter of the image side surface of the first spacing element can also be controlled, which helps the first spacing element to block ineffective light and avoid the generation of 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 by software and / or tools such as ZEMAX, CODEV, etc. In the process of simulation using the above software and / or tools, the surface profile of each lens can be simulated and appropriately adjusted according to the surface profile provided by the software and / or tool 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 a convex surface; the third lens has positive optical power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; 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 spacing 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 spacing element and an 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 spacing element and a 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 spacing element, an inner diameter d3s of the object side surface of the third spacing element, an outer diameter D4s of the object side surface of the fourth spacing element and an inner diameter d4s of the object side surface of the fourth spacing 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 spacing element arranged in the lens barrel. By reasonably arranging the focal length and surface shape of the five lenses, the positions of the third spacing element and the fourth spacing 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 spacing element and the 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 can control the difference in inner and outer diameters of the object side of the third spacing element and the fourth spacing 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 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 a photosensitive element located on the imaging surface.

[0087] The optical imaging lens in the present application may use multiple lenses, such as the five lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristics of an aspherical lens are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0088] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiments, the optical imaging lens is not limited to including five lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0089] Figure 1 A dimensioning 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 in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical imaging lens and the surface shape of the specific lens, these parameters will no longer be reflected in the drawings when describing the specific embodiments later.

[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 embodiment 1, there are three examples of embodiment 1-1, embodiment 1-2, and embodiment 1-3, in embodiment 2, there are three examples of embodiment 2-1, embodiment 2-2, and embodiment 2-3, and in embodiment 3, there are three examples of embodiment 3-1, embodiment 3-2, and embodiment 3-3. The parameters such as the radius of curvature, center thickness, and spacing distances between lenses and high-order coefficients of the optical imaging lens in the three examples of the same embodiment are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel and each spacing element 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] Embodiment 1

[0094] like Figures 2 to 8 As shown, the optical imaging lens of the first embodiment is described. Figure 2 FIG. 1 is a schematic diagram showing the structure of the optical imaging lens of Example 1-1. Figure 3 A schematic diagram of the structure of the optical imaging lens of Embodiment 1-2 is shown, Figure 4 The schematic diagram of the structure of the optical imaging lens of Embodiment 1-3 is 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 spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, and a fifth lens E5, which are sequentially arranged in the lens barrel P0 from the object side to the image side.

[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 spacing 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 spacing 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 spacing 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 spacing 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 , which is a schematic diagram of the structure of the optical imaging lens of Example 1-2. The contact method of each spacing element in this example is the same as that of Example 1-1, and the relevant description in Example 1-1 may be referred to, and will not be repeated here.

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

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

[0100] Table 2

[0101]

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

[0103] In Embodiment 1, the total optical length TTL of the optical imaging lens is 5.40 mm, the image height ImgH corresponding to the maximum field angle of the optical imaging lens is 2.00 mm, half of the maximum field angle 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 parameter table of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all in millimeters (mm). In the following table, OBJ (not shown in the figure) is the object distance. STO (not shown in the figure) is the aperture, which is located between the first lens E1 and the second lens E2. S11 and S12 (not shown in the figure) can be the object side surface of the filter and the image side surface of the filter or the object side surface of the protective glass and the image side surface of the protective glass. S13 (not shown in the figure) is the imaging surface.

[0105] Table 3

[0106]

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

[0108] Formula (1).

[0109] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the direction of the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 3; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 4 shows the high-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 the first embodiment 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 the first embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Figure 7 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Figure 8 The magnification chromatic aberration curve of the optical imaging lens of the first embodiment 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 the first embodiment can achieve good imaging quality.

[0114] Embodiment 2

[0115] like Figures 9 to 15 As shown, the optical imaging lens of the second embodiment is described. Fig. 9 FIG. 2 shows a schematic structural diagram of an optical imaging lens of Example 2-1. Fig.10 FIG. 2 shows a schematic structural diagram of an optical imaging lens of Example 2-2. Fig.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 spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, and a fifth lens E5, which are sequentially arranged in the lens barrel P0 from the object side to the image side.

[0117] like Fig. 9, which is a schematic diagram of the structure 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 Fig.10 The figure is a schematic diagram of the structure of the optical imaging lens of Example 2-2. The difference from Example 2-1 is that a first auxiliary spacer element P1b is further provided on the image side of the first spacer element P1, and a second auxiliary spacer element P2b is further provided on the image side of the second spacer element P2. At this time, the image side surface of the first spacer element P1 contacts the object side surface of the first auxiliary spacer element P1b, the image side surface of the first auxiliary spacer element P1b contacts the object side surface S3 of the second lens, the image side surface of the second spacer element P2 contacts the object side surface of the second auxiliary spacer element P2b, and the image side surface of the second auxiliary spacer element P2b contacts the object side surface S5 of the third lens. The contact mode of the remaining spacer elements in this example is the same as that of Example 2-1, and the relevant description in Example 2-1 may be referred to, and no further description is given here.

[0119] like Fig.11 , which is a schematic diagram of the structure of the optical imaging lens of Example 2-3. The difference from Example 2-1 is that the inner annular surface of the lens barrel P0 has an abutment portion extending toward the optical axis, the image side surface of the first spacing element P1 contacts the abutment portion, and the object side surface S3 of the second lens contacts the abutment portion. The arrangement of the abutment portion can improve the assembly stability of the front lens. The contact method of the remaining spacing elements in this example is the same as that of Example 2-1, and the relevant description in Example 2-1 can be referred to, 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 the second embodiment, the object side surface S1 of the first lens is a concave surface, and the image side surface S2 of the first lens is a concave surface. The object side surface S3 of the second lens is a convex surface, and the image side surface S4 of the second lens is a concave surface. The object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The object side surface S7 of the fourth lens is a convex surface, and the image side surface S8 of the fourth lens is a convex surface. The object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface.

[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 angle of the optical imaging lens is 1.00 mm, half of the maximum field angle 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 parameter table of the optical imaging lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all in millimeters (mm). In the following table, OBJ (not shown in the figure) is the object distance. STO (not shown in the figure) is the aperture, which is located between the first lens E1 and the second lens E2. S11 and S12 (not shown in the figure) can be the object side surface of the filter and the image side surface of the filter or the object side surface of the protective glass and the image side surface of the protective glass. S13 (not shown in the figure) is 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] Fig.12 The axial chromatic aberration curve of the optical imaging lens of the second embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.13The astigmatism curve of the optical imaging lens of the second embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.14 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Fig.15 The magnification chromatic aberration curve of the optical imaging lens of the second embodiment 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] Embodiment 3

[0134] like Figures 16 to 22 As shown, the optical imaging lens of embodiment 3 is described. Fig.16 FIG. 3 is a schematic diagram showing the structure of the optical imaging lens of Example 3-1. Fig.17 FIG. 3 is a schematic diagram showing the structure of the optical imaging lens of Example 3-2. Fig.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 spacing element P1, a second lens E2, a second spacing element P2, a third lens E3, a third spacing element P3, a fourth lens E4, a fourth spacing element P4, and a fifth lens E5, which are sequentially arranged in the lens barrel P0 from the object side to the image side.

[0136] like Fig.16 , which is a schematic diagram of the structure 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 Fig.17 , which is a schematic diagram of the structure of the optical imaging lens of Example 3-2. The contact method of the spacer element in this example is the same as that of Example 3-1, and the relevant description in Example 3-1 may be referred to, and will not be repeated here.

[0138] like Fig.18, which is a schematic diagram of the structure of the optical imaging lens of Example 3-3. The difference from Example 3-1 is that the inner annular surface of the lens barrel P0 has an abutment portion extending toward the optical axis, the image side surface S2 of the first lens contacts the abutment portion, and the object side surface of the first spacing element P1 contacts the abutment portion. The arrangement of the abutment portion can improve the assembly stability of the front lens. The contact method of the remaining spacing elements in this example is the same as that of Example 3-1, and the relevant description in Example 3-1 can be referred to, 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 the third embodiment, 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 angle of the optical imaging lens is 1.02 mm, half of the maximum field angle 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 parameter table of the optical imaging lens of Example 3, where the units of the radius of curvature and thickness / distance are all in millimeters (mm). In the following table, OBJ (not shown in the figure) is the object distance. STO (not shown in the figure) is the aperture, which is located between the first lens E1 and the second lens E2. S11 and S12 (not shown in the figure) can be the object side of the filter and the image side of the filter or the object side of the protective glass and the image side of the protective glass. S13 (not shown in the figure) is 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] Fig.19 The axial chromatic aberration curve of the optical imaging lens of the third embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig. 20 The astigmatism curve of the optical imaging lens of the third embodiment is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.21 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Fig. 22 The magnification 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 the third embodiment can achieve good imaging quality.

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

[0153] Table 11

[0154]

[0155] Table 12 shows parameters such as half of 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] The present application also provides an optical device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The optical device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The optical device is equipped with the optical imaging lens described above.

[0159] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0161] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0162] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The invention comprises 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 the first lens, the second lens, the third lens, the fourth lens and the fifth lens in order from the object side to the image side; 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; The inner diameter d3s of the object side surface of the third spacing element and the effective focal length f3 of the third lens satisfy: 0.85≤d3s / f3≤1.35; the inner diameter d3m of the image side surface of the third spacing element and the curvature radius R7 of the object side surface of the fourth lens satisfy: 1.22<d3m / |R7|≤2.52; the outer diameter D3s of the object side surface of the third spacing element, the inner diameter d3s of the object side surface of the third spacing element, the curvature radius R6 of the image side surface of the third lens and the refractive index n3 of the third lens satisfy: .

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 relationship: -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 spacing element and an outer diameter D0s of the object side end surface of the lens barrel satisfy the following: 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 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: 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 between the image side surface of the second lens and the object side surface of the third lens on the optical axis of the optical imaging lens, the outer diameter D2s of the object side surface of the second spacing element and the maximum axial thickness CP2 of the second spacing element satisfy the following: .

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 spacing element, the air space T34 from the image side surface of the third lens to 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 spacing element to the object-side surface of the fourth spacing 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: .

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 lens to the fifth lens 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: .

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.

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