Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel, and a lens group and a spacing element group which are arranged in the lens barrel, the lens group sequentially comprises a first lens to a fifth lens from an object side to an image side along an optical axis direction, and the object side surface of a second lens is a concave surface; the spacing element group at least comprises a first spacing element; the first spacing element is positioned between the first lens and the second lens and is in contact with the image side surface part of the first lens; the air interval T12 of the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first interval element meet the following condition: T12 / CP1 is more than or equal to 2.67 and less than or equal to 3.45; the curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacing element satisfy the following relation:-2.76 < = R3 / d1m < =-2.14. The optical imaging lens solves the problem that stray light is serious in order to meet the assembly stability requirement in an 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] With the rapid development of terminal electronic products, users' requirements for the shooting functions of electronic products are gradually increasing. In order to continuously meet users' needs for shooting functions, the performance requirements of optical imaging lenses in products are constantly increasing, and the size of optical imaging lenses is also getting thinner as the product becomes thinner. Problems are prone to occur during the assembly process of thin optical imaging lenses. However, in order to improve the assembly stability of optical imaging lenses, the assembly stability of the front lens of the optical imaging lens is usually improved, but this easily leads to the introduction of stray light at the front lens.

[0003] That is to say, in the prior art, the optical imaging lens has a serious problem of stray light caused by the need to meet the assembly stability requirements. Summary of the invention

[0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of serious stray light caused by the optical imaging lens in the prior art in order to meet the assembly stability requirement.

[0005] 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 consists of five lenses, and the lens group comprises, in order from the object side to the image side along the optical axis direction: a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the object side surface of the second lens is a concave surface; the spacer element group comprises at least a first spacer element, wherein the first spacer element is located between the first lens and the second lens and partially contacts with the image side surface of the first lens; an air gap T12 between the first lens and the second lens on the optical axis and a maximum thickness CP1 of the first spacer element satisfy the following conditions: 2.67≤T12 / CP1≤3.45; a curvature radius R3 of the object side surface of the second lens and an inner diameter d1m of the image side surface of the first spacer element satisfy the following conditions: -2.76≤R3 / d1m≤-2.14.

[0006] According to another 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 consists of five lenses, and the lens group comprises, in order from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the spacer element group comprises at least a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and is in contact with the image side surface portion of the fourth lens, an air gap T45 between the fourth lens and the fifth lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a maximum thickness CP4 of the fourth spacer element satisfy the following: 1.30≤(T45+CP4) / CT4≤3.73, and a curvature radius R7 of the object side surface of the fourth lens, a refractive index N4 of the fourth lens, 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: -5.39≤R7*N4 / (D4s-d4s)≤-3.11.

[0007] According to another 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 lens group includes, in order from the object side to the image side along the optical axis direction: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the spacer element group includes at least a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface of the first lens, and the second spacer element is located between the second lens and the third lens and is in contact with the image side surface of the second lens. , the effective focal length f2 of the second lens, the interval EP12 between the first spacing element and the second spacing element in the optical axis direction, and the center thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.41; the fourth lens has positive optical power, and the curvature radius R5 of the object side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D2m of the image side surface of the second spacing element, and the inner diameter d2m of the image side surface of the second spacing element satisfy: 13.75≤R5*N3 / (D2m-d2m)≤24.96.

[0008] Furthermore, the first lens has positive power, and the effective focal length f1 of the first lens, the maximum thickness CP1 of the first spacing element, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element in the optical axis direction satisfy: 3.43≤f1 / (EP01+CP1)≤4.32.

[0009] Furthermore, the image side surface of the first lens is a concave surface, and the curvature radius R2 of the image side surface of the first lens, the outer diameter D1s of the object side surface of the first spacing element, and the inner diameter d1s of the object side surface of the first spacing element satisfy: 2.33≤R2 / (D1s-d1s)≤5.47.

[0010] Furthermore, the image side surface of the second lens is a convex surface, and the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer element satisfy: -21.43≤R4 / d2s≤-4.51.

[0011] Furthermore, the object side surface of the third lens is a convex surface, the spacer element group also includes a second spacer element, the second spacer element is located between the second lens and the third lens and is in contact with the image side surface of the second lens, and the curvature radius R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacer element satisfy: 14.84≤R5 / d2m≤21.13.

[0012] Furthermore, the second lens has negative optical power, and the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens. The effective focal length f2 of the second lens, the interval EP12 between the first spacer element and the second spacer element in the optical axis direction, and the center thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.41.

[0013] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens, and the air gap T23 between the second lens and the third lens on the optical axis and the maximum thickness CP2 of the second spacer element satisfy: 5.15≤T23 / CP2≤8.33.

[0014] Further, the third lens has positive optical power, and the spacer element group also includes a second spacer element and a third spacer element. The second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens. The third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens. The effective focal length f3 of the third lens, the interval EP23 between the second spacer element and the third spacer element in the optical axis direction, and the air interval T34 between the third lens and the fourth lens on the optical axis satisfy: 21.71≤f3 / (EP23+T34)≤47.36.

[0015] Furthermore, the image side surface of the third lens is a convex surface, and the spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer element satisfy: -36.54≤R6 / d3s≤-12.01.

[0016] Furthermore, the spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer element, and the center thickness CT3 of the third lens on the optical axis satisfy: 1.56≤(T34+CP3) / CT3≤2.45.

[0017] Furthermore, the fourth lens has positive optical power, and the spacer element group also includes a third spacer element and a fourth spacer element. The third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens. The fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The effective focal length f4 of the fourth lens and the interval EP34 between the third spacer element and the fourth spacer element in the optical axis direction satisfy: 16.79≤f4 / EP34≤62.69.

[0018] Furthermore, the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, and the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.30≤(T45+CP4) / CT4≤3.73.

[0019] Further, the object side surface of the fourth lens is concave, the spacer element group also includes a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and contacts with the image side surface portion of the fourth lens, and the curvature radius R7 of the object side surface of the fourth lens, the refractive index N4 of the fourth lens, 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: -5.39≤R7*N4 / (D4s-d4s)≤-3.11.

[0020] Furthermore, the optical imaging lens satisfies at least one of the following: the object side surface of the first lens is convex; the image side surface of the fourth lens is convex; the fifth lens has negative optical power, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave.

[0021] According to the technical solution of the present invention, an optical imaging lens comprises a lens barrel, a lens group and a spacer element group arranged in the lens barrel, wherein the lens group consists of five lenses, and the lens group comprises, in order from the object side to the image side along the optical axis direction: a first lens, a second lens, a third lens, a fourth lens and a fifth lens, wherein the object side surface of the second lens is a concave surface; the spacer element group comprises at least a first spacer element, wherein the first spacer element is located between the first lens and the second lens and partially contacts with the image side surface of the first lens; an air gap T12 between the first lens and the second lens on the optical axis and a maximum thickness CP1 of the first spacer element satisfy the following conditions: 2.67≤T12 / CP1≤3.45; a radius of curvature R3 of the object side surface of the second lens and an inner diameter d1m of the image side surface of the first spacer element satisfy the following conditions: -2.76≤R3 / d1m≤-2.14.

[0022] The optical imaging lens of the present application is composed of a lens barrel, five lenses and at least one spacer element. When the air interval T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first spacer element satisfy the following conditions: 2.67≤T12 / CP1≤3.45, the interval between the first lens and the second lens can be controlled, and the risk of interference when the first lens and the second lens are assembled can be reduced, which is beneficial to improving the stability of the assembly of the first lens and the second lens. In addition, by limiting the maximum thickness of the first spacer element, the bearing force of the first spacer element on the first lens and the second lens can be guaranteed, so as to further improve the assembly stability. Since the ratio of the center spacing distance between the first lens and the second lens to the first spacing element is in the range of 2.67 to 3.45, the spacing distance between the first lens and the second lens at various locations is relatively uniform, and the air spacing between the first lens and the second lens will affect the optical path. If the air spacing between the first lens and the second lens is too large or too small, the risk of stray light will increase. In order to reduce the risk of stray light, the present application constrains R3 / d1m within a reasonable range, and the incident angle of the light entering the object side of the second lens can be adjusted to reduce the deflection of large-angle light, which is beneficial to reducing the generation of stray light. At the same time, limiting the inner diameter of the image side of the first spacing element can block non-imaging light entering the second lens to further reduce the generation of stray light. 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] Figures 4 to 7 The axial chromatic aberration, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the first embodiment of the present invention are respectively shown;

[0028] Figure 8 A schematic structural diagram of an optical imaging lens according to Embodiment 2-1 of the present invention is shown;

[0029] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 2-2 of the present invention is shown;

[0030] Figures 10 to 13 The axial chromatic aberration, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the second embodiment of the present invention are respectively shown;

[0031] Fig.14 A schematic structural diagram of an optical imaging lens according to Embodiment 3-1 of the present invention is shown;

[0032] Fig.15 A schematic structural diagram of an optical imaging lens according to Embodiment 3-2 of the present invention is shown;

[0033] Figures 16 to 19 The axial chromatic aberration, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the third embodiment of the present invention are respectively shown;

[0034] Fig. 20 A schematic structural diagram of an optical imaging lens according to Embodiment 4-1 of the present invention is shown;

[0035] Fig.21 A schematic structural diagram of an optical imaging lens according to Embodiment 4-2 of the present invention is shown;

[0036] Figure 22 to Figure 25 The axial chromatic aberration, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the fourth embodiment of the present invention are respectively shown;

[0037] Fig.26 A stray light path diagram of an optical imaging lens according to an optional embodiment of the present invention is shown;

[0038] Fig. 27 Shows Fig.26 The stray light spot diagram of the optical imaging lens in FIG.

[0039] Fig.28 A stray light path diagram of an optical imaging lens in an example is shown;

[0040] Fig.29 Shows Fig.28 The stray light spot diagram of the optical imaging lens in FIG.

[0041] Fig.30 A stray light path diagram of an optical imaging lens in another example is shown;

[0042] Fig.31 Shows Fig.30 The stray light spot diagram of the optical imaging lens.

[0043] The above drawings include the following reference numerals:

[0044] P0, lens barrel; E1, first lens; P1, first spacer; E2, second lens; P2, second spacer; E3, third lens; P3, third spacer; E4, fourth lens; P4, fourth spacer; E5, fifth lens; S1, object side surface of first lens; S2, image side surface of first lens; S3, object side surface of second lens; S4, image side surface of second lens;

[0045] 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

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 the general knowledge 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 convexity and concavity. 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. In the present application, the left side is the object side and the right side is the image side.

[0052] In order to solve the problem in the prior art that optical imaging lenses have serious stray light caused by meeting the assembly stability requirement, the main purpose of the present invention is to provide an optical imaging lens.

[0053] like Figures 1 to 25 As shown, the optical imaging lens comprises a lens barrel, a lens group and a spacer element group arranged in the lens barrel, the lens group consists of five lenses, and the lens group comprises, in order from the object side to the image side along the optical axis direction: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the spacer element group comprises at least a first spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface portion of the first lens; the air gap T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first spacer element satisfy: 2.67≤T12 / CP1≤3.45; the curvature radius R3 of the object side surface of the second lens and the inner diameter d1m of the image side surface of the first spacer element satisfy: -2.76≤R3 / d1m≤-2.14.

[0054] The optical imaging lens of the present application is composed of a lens barrel, five lenses and at least one spacer element. When the air interval T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first spacer element satisfy the following conditions: 2.67≤T12 / CP1≤3.45, the interval between the first lens and the second lens can be controlled, and the risk of interference when the first lens and the second lens are assembled can be reduced, which is beneficial to improving the stability of the assembly of the first lens and the second lens. In addition, by limiting the maximum thickness of the first spacer element, the bearing force of the first spacer element on the first lens and the second lens can be guaranteed, so as to further improve the assembly stability. Since the ratio of the center spacing distance between the first lens and the second lens to the first spacing element is in the range of 2.67 to 3.45, the spacing distance between the first lens and the second lens at various locations is relatively uniform, and the air spacing between the first lens and the second lens will affect the optical path. If the air spacing between the first lens and the second lens is too large or too small, the risk of stray light will increase. In order to reduce the risk of stray light, the present application constrains R3 / d1m within a reasonable range, and the incident angle of the light entering the object side of the second lens can be adjusted to reduce the deflection of large-angle light, which is beneficial to reducing the generation of stray light. At the same time, limiting the inner diameter of the image side of the first spacing element can block non-imaging light entering the second lens to further reduce the generation of stray light.

[0055] In addition, refer to Table 1 and Figure 26 to Figure 31 As shown, Fig.26 The stray light path diagram of the optical imaging lens when T12 / CP1=2.84 and R3 / d1m=-2.59 is shown. Fig. 27 Shows Fig.26 Stray light spot diagram of optical imaging lens. Fig.28 The stray light path diagram of the optical imaging lens when T12 / CP1=2.84 and R3 / d1m=-5 is shown. Fig.29 Shows Fig.28 Stray light spot diagram of optical imaging lens. Fig.30 The stray light path diagram of the optical imaging lens when T12 / CP1=2.84 and R3 / d1m=-1 is shown. Fig.31 Shows Fig.30 Stray light spot diagram of optical imaging lens.

[0056] Refer to Table 1 and Figure 26 to Figure 31It can be seen that when the optical imaging lens satisfies T12 / CP1=2.84, R3 / d1m=-2.59, the stray light energy is weakened, the stray light is improved, and the performance is better. When the optical imaging lens satisfies T12 / CP1=2.84, R3 / d1m=-5, the stray light energy is relatively strong, the stray light has a greater impact on the imaging quality, and the performance is poor. When the optical imaging lens satisfies T12 / CP1=2.84, R3 / d1m=-1, the stray light energy is relatively strong, the stray light has a greater impact on the imaging quality, and the performance is poor. It can be seen that when R3 / d1m is in the range of -2.76 to -2.14, the stray light improvement effect of the optical imaging lens is better. Therefore, the present application controls the deflection angle of the light in the second lens by constraining -2.76≤R3 / d1m≤-2.14, reduces the light deflected at a large angle from entering the rear optical system, and is conducive to reducing the generation of stray light.

[0057]

[0058] Table 1

[0059] It should be noted that the present application limits R3 / d1m within a reasonable range, constrains the relationship between the second lens and the first spacer, controls the range of light entering the second lens, and at the same time, the first spacer blocks the imaging light entering the second lens to solve the stray light problem caused by T12 / CP1 being in the range of 2.67 to 3.45. When R3 / d1m meets the above range, the purpose of improving stray light can be achieved, and it does not depend on the focal length of the lens and the surface shape of the lens. The focal length and surface shape of the lens are further optimization of the optical imaging lens on this basis. Each lens can be positive or negative according to the actual design requirements of the optical system, and the surface shape of each lens can also be convex or concave according to the design requirements of the optical system. When the optical system meets the following requirements: 2.67≤T12 / CP1≤3.45; -2.76≤R3 / d1m≤-2.14, the optical imaging lens can reduce the influence of stray light while improving the assembly stability.

[0060] For example, in some optional embodiments, the first lens has a positive optical focal length. By constraining the first lens to have a positive optical focal length, it is beneficial for large-angle light to converge into the optical imaging lens, which is beneficial for improving the luminous flux. For another example, in some optional embodiments, the second lens has a negative optical focal length, which can balance the aberration caused by the first lens and improve the imaging quality. For another example, in some optional embodiments, the third lens has a positive optical focal length, which appropriately converges the light so that the light smoothly transitions to the rear. For another example, in some optional embodiments, the fourth lens has a positive optical focal length to further converge the light so that the light smoothly transitions to the rear. For another example, in some optional embodiments, the fifth lens has a negative optical focal length. By constraining the fifth lens to have a negative optical focal length, the aberration caused by the positive lens in front can be balanced to improve the imaging quality. For another example, in some optional embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the object side surface of the second lens is concave, and the image side surface of the second lens is convex; the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex; the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is concave. By reasonably constraining the surface shape of each lens, it is beneficial to reasonably constrain the trend of light, ensure a smooth transition of light, and help correct aberrations. The optical imaging lens can be simulated by software and / or tools such as ZEMAX and CODEV. Preferably, the optical imaging lens can be simulated by CODEV. In the process of simulation using software and / or tools such as the above, the surface shape of each lens can be simulated and appropriately adjusted according to the surface shape of the software and / or tools used.

[0061] In some optional embodiments, the effective focal length f1 of the first lens, the maximum thickness CP1 of the first spacing element, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element in the direction of the optical axis satisfy: 3.43≤f1 / (EP01+CP1)≤4.32. By constraining f1 / (EP01+CP1) within a reasonable range, the edge thickness of the first lens and the maximum thickness of the first spacing element can be limited while ensuring the structural strength of the front end of the lens barrel, so as to ensure the bearing strength between the lens barrel, the first lens and the first spacing element, and ensure the matching strength between the first lens, the lens barrel and the first spacing element, so as to improve the assembly stability, and at the same time constrain the effective focal length of the first lens, so as to ensure the imaging requirements of the first lens and the stability of the imaging performance of the optical imaging lens.

[0062] In some optional embodiments, the curvature radius R2 of the image side surface of the first lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy the following relationship: 2.33≤R2 / (D1s-d1s)≤5.47. By constraining R2 / (D1s-d1s) within a reasonable range, the deflection angle of the image side surface of the first lens to the light can be controlled to ensure that the imaging light emitted by the first lens smoothly passes through the inner diameter of the first spacer element and enters the rear optical system. The supporting range between the first spacer element and the first lens is also ensured, so as to improve the stability of the first lens assembly. At the same time, the shape of the optically effective area of ​​the second lens can be constrained, and the problem of too small difference between the inner and outer diameters of the object side surface of the first spacer element, which leads to the inability to block the edge stray light of the lens and the excessive stray light, can be avoided. The problem of too large difference between the inner and outer diameters of the object side surface of the first spacer element, which leads to the first spacer element intercepting the imaging light and resulting in low relative illumination, can also be avoided.

[0063] In some optional embodiments, the spacer element group further includes a second spacer element, which is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer element satisfy: -21.43≤R4 / d2s≤-4.51. By constraining R4 / d2s within a reasonable range, the deflection angle of the image side surface of the second lens to the light can be constrained to reduce the light deflected at a large angle, so as to ensure that the imaging light emitted by the second lens smoothly passes through the second spacer element and enters the rear optical system. At the same time, the second spacer element can also block the non-imaging light incident on the third lens to reduce the generation of stray light, so as to improve the imaging quality of the optical imaging lens.

[0064] In some optional embodiments, the spacer element group further includes a second spacer element, the second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the radius of curvature R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacer element satisfy: 14.84≤R5 / d2m≤21.13. By constraining R5 / d2m within a reasonable range, the range of light entering the third lens can be controlled, the second spacer element can block stray light, reduce stray light entering the third lens, and control the degree of deflection of light entering the third lens to reduce large-angle deflection of light, reduce the situation of multiple reflections of non-imaging light in the non-effective diameter area of ​​the third lens, and further reduce the generation of stray light ghost images.

[0065] In some optional embodiments, the spacer element group further includes a second spacer element, the second spacer element is located between the second lens and the third lens and contacts the image side surface of the second lens, and the effective focal length f2 of the second lens, the interval EP12 between the first spacer element and the second spacer element in the optical axis direction, and the center thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.41. By constraining f2 / (EP12+CT2) within a reasonable range, the bending length of the mechanism part of the first lens and the second lens can be controlled within a reasonable range, while ensuring the edge thickness and the middle thickness of the second lens. Under the premise of ensuring the molding of the second lens, it is beneficial to improve the structural strength of the second lens, ensure that the second lens supports the first lens and the second lens, and further improve the assembly stability of the optical imaging lens, so that the optical imaging lens meets the imaging performance and the reliability requirements.

[0066] In some optional embodiments, the spacer element group further includes a second spacer element, the second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens, and the air gap T23 between the second lens and the third lens on the optical axis and the maximum thickness CP2 of the second spacer element satisfy: 5.15≤T23 / CP2≤8.33. By controlling the air gap between the second lens and the third lens and the maximum thickness of the second spacer, the air space for light to propagate in the air can be reduced, which is beneficial to controlling the shape of the object side surface of the third lens and the image side surface of the second lens, reducing the difficulty of molding the second lens and the third lens, and facilitating the adjustment of the stability of the MTF of the optical imaging lens during assembly.

[0067] In some optional embodiments, the spacer element group also includes a second spacer element and a third spacer element, the second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the effective focal length f3 of the third lens, the interval EP23 between the second spacer element and the third spacer element in the optical axis direction, and the air interval T34 between the third lens and the fourth lens on the optical axis satisfy: 21.71≤f3 / (EP23+T34)≤47.36. By constraining f3 / (EP23+T34) within a reasonable range, the degree of convergence of light by the third lens can be controlled to ensure the imaging quality of the optical imaging lens, while reducing the imaging quality change caused by the change of the air gap. By constraining the distance between the second spacing element and the third spacing element, more options can be provided for the edge thickness of the third lens and the placement of auxiliary spacing elements between the third lens and the second spacing element, which can more effectively improve the spatial structure and prevent the bearing instability caused by the excessive distance between the image side surface of the second lens and the object side surface of the fourth lens from occurring, thereby ensuring the imaging stability of the optical imaging lens.

[0068] In some optional embodiments, the spacer element group further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens, and the curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer element satisfy: -36.54≤R6 / d3s≤-12.01. By constraining R6 / d3s within a reasonable range, the shape of the third lens can be constrained, which is beneficial to the processing and molding of the third lens. At the same time, the curvature radius of the image side surface of the third lens is controlled, and the influence of the third lens on the chromatic aberration of the optical imaging lens can also be reduced.

[0069] In some optional embodiments, the spacer element group further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens, and the air space T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer element, and the center thickness CT3 of the third lens on the optical axis satisfy: 1.56≤(T34+CP3) / CT3≤2.45. By constraining (T34+CP3) / CT3 within a reasonable range, it is beneficial to improve the structural strength of the third lens, reduce the occurrence of assembly instability, ensure that the ratio is within a smaller range, and can also reduce the stray light problem caused by the excessive distance between the fourth lens support position and the image side surface of the third lens, further improving the stability of the imaging performance of the optical imaging lens.

[0070] In some optional embodiments, the spacer element group further includes a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, and the effective focal length f4 of the fourth lens and the interval EP34 between the third spacer element and the fourth spacer element in the optical axis direction satisfy: 16.79≤f4 / EP34≤62.69. By constraining f4 / EP34 within a reasonable range, the center thickness and edge thickness of the fourth lens can be constrained, preventing the fourth lens from being broken due to the excessive thinness of the edge supporting portion during the assembly process, thereby improving the assembly stability.

[0071] In some optional embodiments, the spacer element group further includes a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and is in contact with the image side surface of the fourth lens, and the air space T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.30≤(T45+CP4) / CT4≤3.73. By constraining (T45+CP4) / CT4 within a reasonable range, the interval between the fourth lens and the fifth lens and the center thickness of the fourth lens can be constrained, the structural strength of the fourth lens can be ensured, and at the same time, it is beneficial to improve the stability of the assembly between the fourth lens and the fifth lens, and at the same time, it can reduce the risk of interference between the fourth lens and the fifth lens during the assembly process, which is beneficial to improve the performance of optical imaging performance.

[0072] In some optional embodiments, the spacer element group further includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the image side surface of the fourth lens, and the curvature radius R7 of the object side surface of the fourth lens, the refractive index N4 of the fourth lens, 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: -5.39≤R7*N4 / (D4s-d4s)≤-3.11. By constraining R7*N4 / (D4s-d4s) within a reasonable range, the bearing area between the fourth spacer element and the fourth lens can be controlled to ensure the bearing stability between the fourth spacer element and the fourth lens, and at the same time, the degree of light deflection in the fourth lens can be constrained to ensure that the imaging light passes smoothly through the fourth spacer element into the rear optical system, which is conducive to reducing the generation of stray light. By constraining the difference between the inner and outer diameters of the fourth spacer element, it is helpful to ensure the shape of the fourth lens and the edge bearing range of the object side of the fifth lens, reduce the difficulty of molding the fifth lens, avoid the problem of structural stray light caused by the excessive difference in effective diameters between the fourth lens and the fifth lens, and facilitate the adjustment of the lens field curvature during assembly.

[0073] According to another 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, the lens group consisting of five lenses, and the lens group sequentially including: a first lens, a second lens, a third lens, a fourth lens and a fifth lens along the optical axis from the object side to the image side; the spacer element group includes at least a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and is in contact with the image side surface portion of the fourth lens, an air gap T45 between the fourth lens and the fifth lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, and a maximum thickness CP4 of the fourth spacer element satisfy the following: 1.30≤(T45+CP4) / CT4≤3.73, the fourth lens has positive focal power, and a curvature radius R7 of the object side surface of the fourth lens, a refractive index N4 of the fourth lens, 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: -5.39≤R7*N4 / (D4s-d4s)≤-3.11.

[0074] The optical imaging lens of the present application is composed of a lens barrel, five lenses and at least one spacer element, and when the air interval T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 1.30≤(T45+CP4) / CT4≤3.73, the interval between the fourth lens and the fifth lens and the center thickness of the fourth lens can be constrained, the structural strength of the fourth lens can be ensured, and the stability of the assembly between the fourth lens and the fifth lens can be improved, and the risk of interference between the fourth lens and the fifth lens during the assembly process can be reduced, which is beneficial to improving the optical imaging performance. Since (T45+CP4) is greater than CT4, the air interval between the fourth lens and the fifth lens is larger than the center thickness of the fourth lens, and the distance that the light propagates between the fourth lens and the fifth lens is too long, which increases the risk of light scattering. After being scattered, part of the light will be deflected to the optical structure area of ​​the rear optical system, thereby increasing the risk of stray light generation. In order to reduce the risk of stray light, the present application constrains R7*N4 / (D4s-d4s) within a reasonable range, and constrains the positive and negative focal length of the fourth lens, which can ensure that the light is in a convergent state after passing through the fourth lens, reducing the risk of stray light caused by the large spacing between the fourth lens and the fifth lens, and at the same time constrains the angle and refractive index of the object side of the fourth lens, which is conducive to controlling the degree of deflection of the light in the fourth lens, reducing the light deflected at a large angle, further reducing the risk of stray light, ensuring that the imaging light passes smoothly through the fourth spacing element and enters the rear optical system, while controlling the bearing area between the fourth spacing element and the fourth lens, further improving the bearing stability between the fourth spacing element and the fourth lens. By constraining the difference between the inner and outer diameters of the fourth spacing element, it is conducive to ensuring the shape of the fourth lens and the edge bearing range of the object side of the fifth lens, reducing the difficulty of forming the fifth lens, avoiding the problem of structural stray light caused by the large difference in effective diameter between the fourth lens and the fifth lens, and at the same time facilitating the adjustment of the lens field curvature during assembly.

[0075] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0076] According to another 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 lens group includes, in order from the object side to the image side along the optical axis direction: a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the spacer element group includes at least a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface of the first lens, the second spacer element is located between the second lens and the third lens and is in contact with the image side surface of the second lens The side surfaces are partially in contact, and the effective focal length f2 of the second lens, the interval EP12 between the first spacing element and the second spacing element in the direction of the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.41; the curvature radius R5 of the object side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D2m of the image side surface of the second spacing element, and the inner diameter d2m of the image side surface of the second spacing element satisfy: 13.75≤R5*N3 / (D2m-d2m)≤24.96.

[0077] The optical imaging lens of the present application is composed of a lens barrel, five lenses and at least one spacer element, and when the effective focal length f2 of the second lens, the interval EP12 between the first spacer element and the second spacer element in the optical axis direction, and the center thickness CT2 of the second lens on the optical axis satisfy the following conditions: -14.21≤f2 / (EP12+CT2)≤-12.41, the bending length of the mechanism part of the first lens and the second lens is controlled within a reasonable range, while the edge thickness and the middle thickness of the second lens are guaranteed. Under the premise of ensuring the molding of the second lens, it is beneficial to improve the structural strength of the second lens, ensure that the second lens supports the first lens and the second lens, and further help improve the assembly stability of the optical imaging lens, so that the optical imaging lens meets the reliability requirements while meeting the imaging performance. By constraining f2 / (EP12+CT2) within a reasonable range, the degree of deflection of the light when passing through the second lens and the distance it propagates in the second lens can be constrained. Since f2 / (EP12+CT2) is in the range of -14.21 to -12.41, the second lens has a divergent effect on the light, resulting in a larger exit angle of the light after exiting the second lens. The large-angle light easily enters the optical structure area of ​​the third lens to form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, the present application constrains R5*N3 / (D2m-d2m) within a reasonable range, which can control the deflection angle of the light when entering the object side of the third lens, so as to reduce the large-angle light deflection to the optical structure area of ​​the third lens, reduce the multiple reflections at the edge of the third lens, and help reduce stray light. At the same time, the area where the second spacing element blocks the edge of the third lens is controlled to further reduce the stray light entering the optical structure area of ​​the third lens, further reducing the generation of stray light.

[0078] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0079] In some optional embodiments, the above-mentioned multiple lenses may have at least one trimmed lens, the outer peripheral surface of the trimmed lens may have a trimmed portion and a non-trimmed portion, and the outer diameter of the trimmed portion of the lens is smaller than the outer diameter of the non-trimmed portion of the lens. When the outer peripheral surface of the lens has a trimmed portion, the outer diameter of the lens generally refers to the outer diameter of the non-trimmed portion of the lens.

[0080] In some optional embodiments, at least one trimming spacer element may be included in the plurality of spacer elements. The outer circumference of the trimming spacer element may have a trimming portion and a non-trimming portion, and the outer diameter of the trimming portion of the trimming spacer element is smaller than the outer diameter of the non-trimming portion of the trimming spacer element, and the outer diameter of the spacer element generally refers to the maximum outer diameter of the non-trimmed portion.

[0081] Optionally, the optical imaging lens may further include a protective glass for protecting a photosensitive element located on the imaging surface.

[0082] It should be noted that each lens is composed of a central optical effective diameter area and an edge structure area, and the edge structure area is located on the outer peripheral side of the central optical effective diameter area and is arranged around the circumference of the central optical effective diameter area. The central optical effective diameter area is used for the passage of imaging light, while the edge structure area is not used for the passage of imaging light, and is used to abut against the lens barrel or adjacent lenses or adjacent spacing elements. The edge structure area is also called a non-effective diameter area.

[0083] 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.

[0084] 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.

[0085] Figure 1 A schematic diagram of the dimensions of an optical imaging lens of the present application is shown. Figure 1 Parameters such as d1s, d1m, D1s, d2s, d2m, d3s, d4s, D4s, CP1, CP2, CP3, CP4, EP01, EP12, EP23, and EP34 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.

[0086] 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.

[0087] It should be noted that in the following embodiment 1, there are two examples, namely, embodiment 1-1 and embodiment 1-2; in embodiment 2, there are two examples, namely, embodiment 2-1 and embodiment 2-2; in embodiment 3, there are two examples, namely, embodiment 3-1 and embodiment 3-2; and in embodiment 4, there are two examples, namely, embodiment 4-1 and embodiment 4-2. In the two examples of the same embodiment, the parameters such as the radius of curvature, center thickness, and spacing distance between lenses of the optical imaging lens are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel, the first spacing element, the second spacing element, and the third spacing element, as well as the shapes of some lenses are different. In other words, the main structures for imaging are the same, but the auxiliary structures for imaging are different.

[0088] It should be noted that any of the following embodiments 1 to 4 are applicable to all implementation methods of the present application.

[0089] Embodiment 1

[0090] like Figures 2 to 7 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 structural diagram of the optical imaging lens of Embodiment 1-2 is shown.

[0091] like Figure 2 and Figure 3 As shown, the optical imaging lens includes a lens barrel P0, five lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, and a fifth lens E5, which are arranged in sequence from the object side to the image side.

[0092] like Figure 2As shown, it is a structural schematic diagram of the optical imaging lens of Example 1-1. In this example, the optical imaging lens also includes a fourth auxiliary spacer element. The object side surface S1 of the first lens partially abuts against the lens barrel. The object side surface and image side surface of the first spacer element P1 partially abut against the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and image side surface of the second spacer element partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the third spacer element partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element partially abut against the image side surface S8 of the fourth lens and the object side surface of the fourth auxiliary spacer element, the image side surface of the fourth auxiliary spacer element partially abuts against the object side surface S9 of the fifth lens, and the image side surface S10 of the fifth lens is spaced apart from the lens barrel.

[0093] like Figure 3 FIG. 1 is a schematic diagram of the structure of the optical imaging lens of Example 1-2. In this example, the supporting and abutting manner of each spacing element 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.

[0094] In summary, the structural parameters of the optical imaging lens of Example 1 in Example 1-1 and Example 1-2 are shown in Table 11.

[0095] In the first embodiment, the object side surface S1 of the first lens is a convex 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 concave surface, and the image side surface S4 of the second lens is a convex 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 concave 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 concave surface.

[0096] In Table 2 below, S13 and S14 may be the surfaces of filters or protective glass, while S15 is the imaging surface and STO is the aperture, which are not shown in the figure.

[0097] Table 2 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0098]

[0099] Table 2

[0100] 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:

[0101]

[0102] 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 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 1; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 3 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspheric mirror surface S1-S8 in Example 1.

[0103] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.2634E-02 -6.4156E-03 -2.0938E-03 -3.5768E-04 -8.8555E-05 2.8626E-05 -1.1313E-05 S2 -3.2532E-02 -1.0001E-03 2.6696E-05 -6.3184E-05 -6.8552E-05 -1.6558E-05 -1.1974E-06 S3 4.9180E-02 3.7741E-03 5.1270E-04 7.8787E-05 -4.6994E-05 -3.2824E-05 -2.8358E-08 S4 4.5599E-02 5.0678E-03 3.1642E-04 4.0880E-04 -2.4333E-05 6.3246E-05 -2.8939E-05 S5 -3.3478E-02 2.6830E-03 1.1230E-03 6.5917E-04 1.9561E-04 8.2448E-05 8.2225E-06 S6 -4.6892E-02 3.0590E-03 2.9195E-03 6.9945E-04 4.7670E-04 -1.9175E-05 7.4180E-05 S7 -1.7679E-01 -1.5766E-02 1.8123E-02 1.0036E-02 2.7038E-03 -1.7675E-03 -1.7261E-03 S8 -4.7281E-02 4.8431E-03 5.3894E-03 2.8298E-04 3.1778E-04 3.4479E-04 8.6606E-05 S9 -3.4779E-01 2.8705E-01 -1.1648E-01 3.9903E-02 -9.7195E-03 -1.5227E-04 5.0382E-04 S10 -1.9691E+00 2.7422E-01 -4.4931E-02 4.4098E-02 -9.5015E-03 1.9147E-03 -6.1065E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 6.4536E-06 -5.0275E-06 2.0496E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 6.9314E-06 1.1866E-06 -1.5183E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -4.5040E-06 3.6498E-06 -2.6980E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 2.0387E-05 -1.4734E-05 9.5844E-06 -6.4602E-06 4.6980E-06 -4.8785E-06 4.7697E-07 S5 7.6521E-06 -9.2419E-06 -2.1763E-07 -2.1678E-06 5.9275E-06 1.6177E-06 3.0992E-06 S6 -3.9009E-05 2.2501E-05 -2.0615E-05 4.7845E-06 -8.0975E-06 0.0000E+00 0.0000E+00 S7 -8.5213E-04 1.8991E-04 3.2855E-04 2.4428E-04 -3.0353E-06 -5.6001E-05 -5.1308E-05 S8 5.9167E-05 4.8411E-05 -3.3959E-06 -1.4355E-05 -3.6840E-05 -7.1019E-06 5.4593E-06 S9 8.3290E-04 -1.0324E-03 5.6830E-04 -2.0010E-04 4.2276E-05 -1.2246E-06 -8.0764E-06 S10 -1.8117E-04 -5.3369E-04 8.1822E-04 3.3298E-04 1.8404E-04 -4.3411E-05 -1.4994E-04

[0104] Table 3

[0105] Figure 4 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 5 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 6 The distortion curve of the optical imaging lens of the first embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Figure 7 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 lens.

[0106] according to Figures 4 to 7 It can be seen that the optical imaging lens provided in the first embodiment can achieve good imaging quality.

[0107] Embodiment 2

[0108] like Figures 8 to 13 As shown, the optical imaging lens of the second embodiment is described. Figure 8 FIG. 2 shows a schematic structural diagram of an optical imaging lens of Example 2-1. Fig. 9 A schematic structural diagram of the optical imaging lens of Example 2-2 is shown.

[0109] like Figure 8 and Fig. 9 As shown, the optical imaging lens includes a lens barrel P0, five lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, and a fifth lens E5, which are arranged in sequence from the object side to the image side.

[0110] like Figure 8As shown, it is a structural schematic diagram of the optical imaging lens of Example 2-1. In this example, the optical imaging lens also includes a fourth auxiliary spacer element. The object side surface S1 of the first lens partially abuts against the lens barrel. The object side surface and image side surface of the first spacer element P1 partially abut against the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively. The object side surface and image side surface of the second spacer element partially abut against the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively. The object side surface and image side surface of the third spacer element partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element partially abut against the image side surface S8 of the fourth lens and the object side surface of the fourth auxiliary spacer element, the image side surface of the fourth auxiliary spacer element partially abuts against the object side surface S9 of the fifth lens, and the image side surface S10 of the fifth lens is spaced apart from the lens barrel.

[0111] like Fig. 9 FIG. 2 is a schematic diagram of the structure of the optical imaging lens of Example 2-2. In this example, the supporting and abutting manner of each spacing element is the same as that of Example 2-1, and the relevant description in Example 2-1 may be referred to, and will not be repeated here.

[0112] In summary, the structural parameters of the optical imaging lens of Example 2 in Example 2-1 and Example 2-2 are shown in Table 11.

[0113] In the second embodiment, the object side surface S1 of the first lens is a convex 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 concave surface, and the image side surface S4 of the second lens is a convex 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 concave 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 concave surface.

[0114] Table 4 shows a 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 millimeters.

[0115]

[0116] Table 4

[0117] Table 5 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror surface S1-S10 in Example 2. Among them, the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0118]

[0119]

[0120] Table 5

[0121] Fig.10 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.11 The 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.12 The distortion curve of the optical imaging lens of the second embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.13 The 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 lens.

[0122] according to Figures 10 to 13 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0123] Embodiment 3

[0124] like Figures 14 to 19 As shown, the optical imaging lens of embodiment 3 is described. Fig.14 FIG. 3 is a schematic diagram showing the structure of the optical imaging lens of Example 3-1. Fig.15 A schematic structural diagram of the optical imaging lens of Example 3-2 is shown.

[0125] like Fig.14 and Fig.15 As shown, the optical imaging lens includes a lens barrel P0, five lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, and a fifth lens E5, which are arranged in sequence from the object side to the image side.

[0126] like Fig.14As shown, it is a schematic diagram of the structure of the optical imaging lens of Example 3-1. In this example, the optical imaging lens also includes a fourth auxiliary spacer element. The object side surface S1 of the first lens partially abuts against the lens barrel. The object side surface and the image side surface of the first spacer element P1 partially abut against the surface S3. The object side surface and the image side surface of the second spacer element partially abut against the image side surface S4 of the second lens and the image side surface S2 of the first lens of the third lens and the object side surface S5 of the second lens. The object side surface and the image side surface of the third spacer element partially abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and the image side surface of the fourth spacer element partially abut against the image side surface S8 of the fourth lens and the object side surface of the fourth auxiliary spacer element, the image side surface of the fourth auxiliary spacer element partially abuts against the object side surface S9 of the fifth lens, and the image side surface S10 of the fifth lens is spaced apart from the lens barrel.

[0127] like Fig.15 FIG. 3 is a schematic diagram of the structure of the optical imaging lens of Example 3-2. In this example, the supporting and abutting manner of each spacing element 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.

[0128] In summary, the structural parameters of the optical imaging lens of Example 3 in Example 3-1 and Example 3-2 are shown in Table 11.

[0129] In the third embodiment, the object side surface S1 of the first lens is a convex 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 concave surface, and the image side surface S4 of the second lens is a convex 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 concave 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 concave surface.

[0130] Table 6 shows a basic structural parameter table of the optical imaging lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0131]

[0132] Table 6

[0133] Table 7 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror surface S1-S10 in Example 3. Among them, the surface shape of each aspherical surface can be defined by the formula (1) given in the above-mentioned Example 1.

[0134]

[0135]

[0136] Table 7

[0137] Fig.16 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.17 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.18 The distortion curve of the optical imaging lens of the third embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.19 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 lens.

[0138] according to Figures 16 to 19 It can be seen that the optical imaging lens provided in the third embodiment can achieve good imaging quality.

[0139] Embodiment 4

[0140] like Figure 20 to Figure 25 As shown, the optical imaging lens of Example 4 is described. Fig. 20 FIG. 4 is a schematic diagram showing the structure of the optical imaging lens of Example 4-1. Fig.21 A schematic structural diagram of the optical imaging lens of Example 4-2 is shown.

[0141] like Fig. 20 and Fig.21 As shown, the optical imaging lens includes a lens barrel P0, five lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, and a fifth lens E5, which are arranged in sequence from the object side to the image side.

[0142] like Fig. 20As shown, it is a schematic diagram of the structure of the optical imaging lens of Example 4-1. In this example, the optical imaging lens also includes a fourth auxiliary spacer element. The object side surface S1 of the first lens partially abuts against the lens barrel. The object side surface and the image side surface of the first spacer element P1 partially abut against the surface S3. The object side surface and the image side surface of the second spacer element respectively abut against the image side surface S4 of the second lens and the image side surface S2 of the first lens of the third lens and the object side surface S5 of the second lens. The object side surface and the image side surface of the third spacer element respectively abut against the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, the object side surface and the image side surface of the fourth spacer element respectively abut against the image side surface S8 of the fourth lens and the object side surface of the fourth auxiliary spacer element, the image side surface of the fourth auxiliary spacer element partially abuts against the object side surface S9 of the fifth lens, and the image side surface S10 of the fifth lens is spaced apart from the lens barrel.

[0143] like Fig.21 FIG. 4 is a schematic diagram of the structure of the optical imaging lens of Example 4-2. In this example, the supporting and abutting manner of each spacing element is the same as that of Example 4-1, and the relevant description in Example 4-1 may be referred to, and will not be repeated here.

[0144] In summary, the structural parameters of the optical imaging lens of Example 4 in Example 4-1 and Example 4-2 are shown in Table 11.

[0145] In the fourth embodiment, the object side surface S1 of the first lens is a convex 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 concave surface, and the image side surface S4 of the second lens is a convex 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 concave 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 concave surface.

[0146] Table 8 shows a basic structural parameter table of the optical imaging lens of Example 4, wherein the units of the radius of curvature and thickness / distance are all millimeters.

[0147]

[0148] Table 8

[0149] Table 9 below gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for the aspheric mirror surfaces S1-S10 in Embodiment 4. The surface shape of each aspheric surface can be defined by the formula (1) given in the above-mentioned Embodiment 1.

[0150]

[0151]

[0152] Table 9

[0153] Fig. 22 The axial chromatic aberration curve of the optical imaging lens of the fourth embodiment is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.23 The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.24 The distortion curve of the optical imaging lens of the fourth embodiment is shown, which indicates the distortion magnitude values ​​corresponding to different field angles. Fig.25 The magnification chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens.

[0154] according to Figure 22 to Figure 25 It can be seen that the optical imaging lens provided in the fourth embodiment can achieve good imaging quality.

[0155] In summary, the optical imaging lenses of Embodiments 1 to 4 respectively satisfy the relationships shown in Table 10.

[0156] Conditional / Example 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 R3 / d1m -2.59 -2.64 -2.56 -2.56 -2.14 -2.21 -2.68 -2.76 R4 / d2s -21.20 -20.80 -11.74 -9.45 -4.51 -4.68 -21.43 -20.83 R5 / d2m 19.61 19.24 18.45 14.84 20.37 21.13 18.10 17.59 R6 / d3s -15.66 -15.30 -13.12 -12.01 -36.54 -33.47 -12.33 -12.33 f1 / (EP01+CP1) 3.89 3.80 3.43 3.62 3.80 4.32 3.95 3.79 f2 / (EP12+CT2) -13.13 -13.50 -13.71 -14.21 -13.64 -13.30 -12.41 -13.05 f3 / (EP23+T34) 29.83 29.25 27.32 23.83 47.36 42.88 21.71 24.05 f4 / EP34 58.93 62.69 30.61 30.61 16.79 20.68 29.26 18.34 (T45+CP4) / CT4 3.73 3.73 2.01 2.01 1.30 1.30 3.36 3.36 (T34+CP3) / CT3 1.99 1.99 2.32 2.32 1.56 1.56 2.45 2.45 T23 / CP2 5.60 5.60 5.15 5.15 8.33 8.33 6.32 6.32 T12 / CP1 2.84 2.84 2.67 2.67 3.45 3.45 2.77 2.77 R2 / (D1s-d1s) 2.87 3.38 2.71 2.90 5.47 3.53 2.33 2.73 R7*N4 / (D4s-d4s) -3.17 -3.11 -3.91 -4.03 -3.61 -3.86 -4.01 -5.39 R5*N3 / (D2m-d2m) 24.75 21.88 19.81 18.12 24.96 17.52 17.20 13.75

[0157] Table 10

[0158] Table 11 shows some parameters of the optical imaging lenses of Examples 1 to 4 (unit: mm).

[0159]

[0160]

[0161] Table 11

[0162] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging 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 imaging device is equipped with the optical imaging lens described above.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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, a lens group and a spacer element group arranged in the lens barrel, The lens group is composed of five lenses, and the lens group includes, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, and the object side surface of the second lens is a concave surface; The spacer element group includes at least a first spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image side surface portion of the first lens; The air interval T12 between the first lens and the second lens on the optical axis and the maximum thickness CP1 of the first spacing element satisfy the following: 2.67≤T12 / CP1≤3.45; A curvature radius R3 of the object-side surface of the second lens and an inner diameter d1m of the image-side surface of the first spacing element satisfy the following: -2.76≤R3 / d1m≤-2.

14.

2. The optical imaging lens according to claim 1, wherein: The first lens has positive optical power, and the effective focal length f1 of the first lens, the maximum thickness CP1 of the first spacing element, and the distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element in the direction of the optical axis satisfy: 3.43≤f1 / (EP01+CP1)≤4.

32.

3. The optical imaging lens according to claim 1, wherein: The image side surface of the first lens is a concave surface, and the curvature radius R2 of the image side surface of the first lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.33≤R2 / (D1s-d1s)≤5.

47.

4. The optical imaging lens according to claim 1, wherein: The image side surface of the second lens is a convex surface, and the spacer element group also includes a second spacer element. The second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens. The curvature radius R4 of the image side surface of the second lens and the inner diameter d2s of the object side surface of the second spacer element satisfy: -21.43≤R4 / d2s≤-4.

51.

5. The optical imaging lens according to claim 1, wherein: The object side surface of the third lens is a convex surface, and the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and partially contacts the image side surface of the second lens. The curvature radius R5 of the object side surface of the third lens and the inner diameter d2m of the image side surface of the second spacer element satisfy the following: 14.84≤R5 / d2m≤21.

13.

6. The optical imaging lens according to claim 1, wherein: The second lens has negative optical focal power, and the spacer element group also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens. The effective focal length f2 of the second lens, the interval EP12 between the first spacer element and the second spacer element in the direction of the optical axis, and the center thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.

41.

7. The optical imaging lens according to claim 1, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens and contacts the image side portion of the second lens. The air gap T23 between the second lens and the third lens on the optical axis and the maximum thickness CP2 of the second spacer element satisfy the following: 5.15≤T23 / CP2≤8.

33.

8. The optical imaging lens according to claim 1, wherein: The third lens has positive optical power, and the spacer element group further includes a second spacer element and a third spacer element, the second spacer element is located between the second lens and the third lens and contacts the image side portion of the second lens, the third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the effective focal length f3 of the third lens, the interval EP23 between the second spacer element and the third spacer element in the direction of the optical axis, and the air interval T34 between the third lens and the fourth lens on the optical axis satisfy: 21.71≤f3 / (EP23+T34)≤47.

36.

9. The optical imaging lens according to claim 1, wherein: The image side surface of the third lens is a convex surface, and the spacer element group also includes a third spacer element. The third spacer element is located between the third lens and the fourth lens and partially contacts the image side surface of the third lens. The curvature radius R6 of the image side surface of the third lens and the inner diameter d3s of the object side surface of the third spacer element satisfy the following: -36.54≤R6 / d3s≤-12.

01.

10. The optical imaging lens according to claim 1, wherein: The spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image side portion of the third lens, and the air gap T34 between the third lens and the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer element, and the center thickness CT3 of the third lens on the optical axis satisfy the following: 1.56≤(T34+CP3) / CT3≤2.

45.

11. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The fourth lens has positive optical power, and the spacer element group also includes a third spacer element and a fourth spacer element. The third spacer element is located between the third lens and the fourth lens and contacts the image side portion of the third lens. The fourth spacer element is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens. The effective focal length f4 of the fourth lens and the interval EP34 between the third spacer element and the fourth spacer element in the optical axis direction satisfy: 16.79≤f4 / EP34≤62.

69.

12. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts the image side portion of the fourth lens, and the air gap T45 between the fourth lens and the fifth lens on the optical axis, the center thickness CT4 of the fourth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy the following: 1.30≤(T45+CP4) / CT4≤3.

73.

13. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The object side surface of the fourth lens is concave, and the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and contacts with the image side surface of the fourth lens. The curvature radius R7 of the object side surface of the fourth lens, the refractive index N4 of the fourth lens, 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: -5.39≤R7*N4 / (D4s-d4s)≤-3.

11.

14. The optical imaging lens according to any one of claims 1 to 10, characterized in that: The optical imaging lens meets at least one of the following requirements: The object side surface of the first lens is a convex surface; The image side surface of the fourth lens is a convex surface; The fifth lens has negative optical power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a concave surface.

Images