Optical imaging lens

Abstract

The utility model 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 the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging equipment technical field, specifically, relate to an optical imaging lens. BACKGROUND

[0002] With the rapid development of terminal electronic products, the user's requirement to the shooting function of electronic product is gradually improved. In order to meet the demand of user to shooting function, the performance requirement of optical imaging lens in product is improved unceasingly, and the size of optical imaging lens is also thinning unceasingly along with the demand of product light and thin, and the optical imaging lens of light and thin is prone to problems in the process of assembly, however, in order to improve the assembly stability of optical imaging lens, the assembly stability of the front end lens of optical imaging lens is usually improved, but this is easy to cause the lens at the front end to introduce stray light.

[0003] That is, the optical imaging lens in the prior art has the problem of serious stray light caused by meeting the assembly stability requirement. CONTENT OF UTILITY MODEL

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

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, an optical imaging lens is provided, which 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 comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along the optical axis direction from the object side to the image side, the object side surface of the second lens is a concave surface, 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 partially contacts the image side surface of the first lens, the air gap T12 of 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, and 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.

[0006] According to another aspect of the utility model, provide a kind of optical imaging lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is composed of five lenses, lens group includes sequentially from object side to image side along optical axis direction: first lens, second lens, third lens, fourth lens and fifth lens;Spacer element group at least includes fourth spacer element, fourth spacer element is located between fourth lens and fifth lens and with the image side surface portion of fourth lens contact, the air spacing T45 of fourth lens and fifth lens on optical axis, the central thickness CT4 of fourth lens on optical axis, between the maximum thickness CP4 of fourth spacer element: 1.30≤(T45+CP4) / CT4≤3.73, the radius of curvature R7 of object side surface of fourth lens, the refractive index N4 of fourth lens, the outer diameter D4s of object side surface of fourth spacer element, between the inner diameter d4s of object side surface of fourth spacer element: -5.39≤R7*N4 / (D4s-d4s)≤-3.11.

[0007] According to another aspect of the utility model, provide a kind of optical imaging lens, including lens barrel and the lens group and spacer element group being arranged in lens barrel, lens group is composed of five lenses, lens group includes sequentially from object side to image side along optical axis direction: first lens, second lens, third lens, fourth lens and fifth lens;Spacer element group at least includes first spacer element and second spacer element, first spacer element is located between first lens and second lens and with the image side surface portion of first lens contact, second spacer element is located between second lens and third lens and with the image side surface portion of second lens contact, between the effective focal length f2 of second lens, the interval EP12 of first spacer element and second spacer element in optical axis direction, the central thickness CT2 of second lens on optical axis: -14.21≤f2 / (EP12+CT2)≤-12.41;Fourth lens has positive refractive power, between the radius of curvature R5 of object side surface of third lens, the refractive index N3 of third lens, the outer diameter D2m of image side surface of second spacer element, the inner diameter d2m of image side surface of second spacer element: 13.75≤R5*N3 / (D2m-d2m)≤24.96.

[0008] Further, the first lens has positive refractive power, the effective focal length f1 of the first lens, the maximum thickness CP1 of the first spacer element, the distance EP01 between the object side surface of the lens barrel and the object side surface of the first spacer element in the optical axis direction satisfies: 3.43≤f1 / (EP01+CP1)≤4.32.

[0009] Further, the image side surface of the first lens is concave, the radius of curvature R2 of the image side surface of the first 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 satisfy: 2.33≤R2 / (D1s-d1s)≤5.47.

[0010] Further, the image side surface of the second lens is convex, the set of spacer elements further comprises 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 a radius of curvature R4 of the image side surface of the second lens and an inner diameter d2s of the object side surface of the second spacer element satisfy: -21.43≤R4 / d2s≤-4.51.

[0011] Further, the object side surface of the third lens is convex, the set of spacer elements further comprises 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 a radius of curvature R5 of the object side surface of the third lens and an inner diameter d2m of the image side surface of the second spacer element satisfy: 14.84≤R5 / d2m≤21.13.

[0012] Further, the second lens has a negative refractive power, the set of spacer elements further comprises 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 an effective focal length f2 of the second lens, a spacing EP12 of the first spacer element and the second spacer element in the optical axis direction, and a central thickness CT2 of the second lens on the optical axis satisfy: -14.21≤f2 / (EP12+CT2)≤-12.41.

[0013] Further, the set of spacer elements further comprises 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 an air spacing T23 of the second lens and the third lens on the optical axis, and a maximum thickness CP2 of the second spacer element satisfy: 5.15≤T23 / CP2≤8.33.

[0014] Further, the third lens has a positive refractive power, the set of spacer elements further comprises a second spacer element and a third 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 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 an effective focal length f3 of the third lens, a spacing EP23 of the second spacer element and the third spacer element in the optical axis direction, and an air spacing T34 of the third lens and the fourth lens on the optical axis satisfy: 21.71≤f3 / (EP23+T34)≤47.36.

[0015] Further, the image side surface of the third lens is convex, the set of spacer elements further comprises 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 a radius of curvature R6 of the image side surface of the third lens and an inner diameter d3s of the object side surface of the third spacer element satisfy: -36.54≤R6 / d3s≤-12.01.

[0016] Further, 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 contacts the image side surface portion of the third lens, the air separation T34 on the optical axis of the third lens and the fourth lens, the maximum thickness CP3 of the third spacer element, the central thickness CT3 on the optical axis of the third lens satisfy: 1.56≤(T34+CP3) / CT3≤2.45.

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

[0018] Further, 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 contacts the image side surface portion of the fourth lens, the air separation T45 on the optical axis of the fourth lens and the fifth lens, the central thickness CT4 on the optical axis of the fourth lens, 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 a concave surface, 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 contacts the image side surface portion 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, the inner diameter d4s of the object side surface of the fourth spacer element satisfy: -5.39≤R7*N4 / (D4s-d4s)≤-3.11.

[0020] Further, the optical imaging lens satisfies at least one of the following: 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 refractive 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.

[0021] The technical scheme of the utility model discloses an optical imaging lens, which 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, the lens group comprises, in sequence along the optical axis direction 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 object side surface of the second lens is a concave surface, 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 partially contacts the image side surface of the first lens, the air gap T12 of 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, and 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.

[0022] The optical imaging lens of the utility model is composed of a lens barrel, five lenses and at least one spacer element, and when the air gap T12 of 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 interval between the first lens and the second lens can be controlled, the risk of interference during assembly of the first lens and the second lens is reduced, the stability of assembly of the first lens and the second lens is improved, 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 ensured, so that the stability of assembly is further improved. Since the ratio of the center interval distance between the first lens and the second lens to the first spacer element is within the range of 2.67 to 3.45, the interval distance between the first lens and the second lens is relatively uniform, and the air gap between the first lens and the second lens affects the optical path, and the air gap between the first lens and the second lens is too large or too small, which will increase the risk of stray light. In order to reduce the risk of stray light, the R3 / d1m is constrained within a reasonable range, the incident angle of light entering the object side surface of the second lens can be adjusted to reduce the deflection of large-angle light, which is conducive to reducing the generation of stray light, and the inner diameter of the image side surface of the first spacer element is limited, which can block the non-imaging light entering the second lens to further reduce the generation of stray light. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0024] Figure 1 The size marking diagram of the optical imaging lens of one optional embodiment of the utility model is shown;

[0025] Figure 2A structure schematic view of the optical imaging lens of the embodiment 1-1 of the utility model is shown;

[0026] Figure 3 A structure schematic view of the optical imaging lens of the embodiment 1-2 of the utility model is shown;

[0027] Figures 4 to 7 The on-axis chromatic aberration, astigmatic curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the embodiment one of the utility model are shown respectively;

[0028] Figure 8 A structure schematic view of the optical imaging lens of the embodiment 2-1 of the utility model is shown;

[0029] Figure 9 A structure schematic view of the optical imaging lens of the embodiment 2-2 of the utility model is shown;

[0030] Figures 10 to 13 The on-axis chromatic aberration, astigmatic curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the embodiment two of the utility model are shown respectively;

[0031] Figure 14 A structure schematic view of the optical imaging lens of the embodiment 3-1 of the utility model is shown;

[0032] Figure 15 A structure schematic view of the optical imaging lens of the embodiment 3-2 of the utility model is shown;

[0033] Figures 16 to 19 The on-axis chromatic aberration, astigmatic curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the embodiment three of the utility model are shown respectively;

[0034] Figure 20 A structure schematic view of the optical imaging lens of the embodiment 4-1 of the utility model is shown;

[0035] Figure 21 A structure schematic view of the optical imaging lens of the embodiment 4-2 of the utility model is shown;

[0036] Figures 22 to 25 The on-axis chromatic aberration, astigmatic curve, distortion curve and magnification chromatic aberration curve of the optical imaging lens of the embodiment four of the utility model are shown respectively;

[0037] Figure 26 A stray light light path diagram of the optical imaging lens of an optional embodiment of the utility model is shown;

[0038] Figure 27 A stray light light spot diagram of the optical imaging lens in Figure 26 is shown;

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

[0040] Figure 29 It shows Figure 28 A stray light spot pattern of an optical imaging lens in a photograph;

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

[0042] Figure 31 It shows Figure 30 A stray light pattern of an optical imaging lens.

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

[0044] P0, Lens tube; E1, First lens; P1, First spacer element; E2, Second lens; P2, Second spacer element; E3, Third lens; P3, Third spacer element; E4, Fourth lens; P4, Fourth spacer element; E5, Fifth lens; 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;

[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 Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0048] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0049] It should be noted that the terms first, second, third, etc. in the present specification are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0050] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0051] In the present specification, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region. If the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be made in accordance with the judgment method of those skilled in the art, with the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) being positive or negative to judge the convexity or concavity. In terms of the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. In terms of the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. 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 of serious stray light caused by the requirement of assembly stability in the prior art optical imaging lens, the main purpose of the present application is to provide an optical imaging lens.

[0053] As shown in Figures 1 to 25 The optical imaging lens includes a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group is composed of five lenses, and the lens group sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens along the optical axis direction from the object side to the image side; the spacer element group at least includes 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 part of the first lens; the air gap T12 of the first lens and the second lens on the optical axis, 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, 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, and the air gap T12 of the first lens and the second lens on the optical axis, the maximum thickness CP1 of the first spacer element satisfy: 2.67≤T12 / CP1≤3.45, which can control the spacing between the first lens and the second lens, reduce the risk of interference when assembling the first lens and the second lens, and improve the stability 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 ensured 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 spacer element is within the range of 2.67 to 3.45, the spacing distance between the first lens and the second lens is relatively uniform, and the air gap between the first lens and the second lens affects the optical path. If the air gap 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 restricts R3 / d1m within a reasonable range, which can adjust the incident angle of the light entering the object side of the second lens to reduce the deflection of the large-angle light, which is conducive to reducing the generation of stray light. At the same time, limiting the inner diameter of the image side of the first spacer element can block the non-imaging light entering the second lens to further reduce the generation of stray light.

[0055] In addition, referring to Table 1 and Figures 26 to 31 shown below, Figure 26 the stray light path diagram of the optical imaging lens satisfying T12 / CP1=2.84, R3 / d1m=-2.59 is shown. Figure 27 the stray light spot diagram of the optical imaging lens in Figure 26 is shown. Figure 28 the stray light path diagram of the optical imaging lens satisfying T12 / CP1=2.84, R3 / d1m=-5 is shown, Figure 29 the stray light spot diagram of the optical imaging lens in Figure 28 is shown. Figure 30 the stray light path diagram of the optical imaging lens satisfying T12 / CP1=2.84, R3 / d1m=-1 is shown, Figure 31 the stray light spot diagram of the optical imaging lens in Figure 30 is shown.

[0056] Referring to Table 1 and Figures 26 to 31It can be seen that when the optical imaging lens satisfies T12 / CP1=2.84 and 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 and R3 / d1m=-5, the stray light energy is 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 and R3 / d1m=-1, the stray light energy is 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, by limiting-2.76≤R3 / d1m≤-2.14, the application controls the deflection angle of the light in the second lens, reduces the light with large deflection angle 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 application limits R3 / d1m in a reasonable range, restricts the relationship between the second lens and the first spacer, controls the range of light entering the second lens, and the first spacer blocks the imaging light entering the second lens to solve the stray light problem when T12 / CP1 is in the range of 2.67 to 3.45. When R3 / d1m satisfies the above range, the purpose of improving stray light can be achieved, and it does not depend on the focal power of the lens and the surface shape of the lens. The focal power and surface shape of the lens are further optimized 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 be convex or concave according to the design requirements of the optical system. The optical system satisfies: 2.67≤T12 / CP1≤3.45; -2.76≤R3 / d1m≤-2.14, so that the optical imaging lens can improve the assembly stability while reducing the influence of stray light.

[0060] For example, in some optional embodiments, the first lens has positive refractive power. By constraining the first lens to have positive refractive power, it is beneficial to converge light rays at a large angle into the optical imaging lens, and it is beneficial to improve the luminous flux. For another example, in some optional embodiments, the second lens has negative refractive power. The negative refractive power of the second lens 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 positive refractive power. The positive refractive power of the third lens can properly converge light rays, and make the light rays smoothly transition to the rear. For another example, in some optional embodiments, the fourth lens has positive refractive power. The positive refractive power of the fourth lens can further converge light rays, and make the light rays smoothly transition to the rear. For another example, in some optional embodiments, the fifth lens has negative refractive power. By constraining the fifth lens to have negative refractive power, the aberration caused by the front positive lens can be balanced, and the imaging quality can be improved. For another example, in some optional embodiments, the object side surface of the first lens is convex, the image side surface of the first lens is concave; the object side surface of the second lens is concave, the image side surface of the second lens is convex; the object side surface of the third lens is convex, the image side surface of the third lens is convex; the object side surface of the fourth lens is concave, the image side surface of the fourth lens is convex; and the object side surface of the fifth lens is concave, 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 light ray trend, ensure smooth transition of light rays, and correct aberration. The optical imaging lens can be simulated by software and / or tools such as ZEMAX, CODEV, etc. Preferably, the optical imaging lens can be simulated by CODEV. In the process of simulation by software and / or tools such as the above, the surface shape of each lens can be simulated according to the surface shape provided by the software and / or tools used and appropriately adjusted.

[0061] In some optional embodiments, the effective focal length f1 of the first lens, the maximum thickness CP1 of the first spacer element, and the distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element in the optical axis direction 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 spacer 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 spacer element, and the fitting strength between the first lens and the lens barrel and the first spacer element, so as to improve the assembly stability, and at the same time, by constraining the effective focal length of the first lens, the imaging requirements of the first lens can be ensured, and the stability of the imaging performance of the optical imaging lens can be ensured.

[0062] In some optional embodiments, the following relationship is met between the radius of curvature 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: 2.33≤R2 / (D1s-d1s)≤5.47. By restricting R2 / (D1s-d1s) within a reasonable range, the folding angle of the light rays by the image-side surface of the first lens can be controlled to ensure that the imaging light rays exiting the first lens pass smoothly through the inner diameter of the first spacer element into the rear optical system, and the abutting range between the first spacer element and the first lens is ensured to facilitate the stability of the first lens group, while the shape of the optical effective area of the second lens can be restricted, and the problem of excessive stray light caused by the difference between the inner and outer diameters of the object-side surface of the first spacer element being too small to block the edge stray light of the lens can be avoided, and the problem of the difference between the inner and outer diameters of the object-side surface of the first spacer element being too large to cause the first spacer element to intercept imaging light rays and result in low relative luminance can also be avoided.

[0063] 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 following relationship is met between the radius of curvature 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: -21.43≤R4 / d2s≤-4.51. By restricting R4 / d2s within a reasonable range, the folding angle of the light rays by the image-side surface of the second lens can be restricted to reduce the light rays that are folded at a large angle, to ensure that the imaging light rays exiting the second lens pass smoothly through the second spacer element into the rear optical system, and the second spacer element can also block the non-imaging light rays incident to the third lens to reduce the generation of stray light and 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 following relationship is met between 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: 14.84≤R5 / d2m≤21.13. By restricting R5 / d2m within a reasonable range, the range of light rays entering the third lens can be controlled, the second spacer element can block stray light to reduce the entry of stray light into the third lens, while the folding degree of the light rays entering the third lens is controlled to reduce the large-angle folding of the light rays and the multiple reflection of the non-imaging light rays in the non-effective diameter area of the third lens, further reducing the generation of stray light ghost images.

[0065] In some optional embodiments, the set of spacer elements further comprises a second spacer element located between the second lens and the third lens and in contact with the image-side surface portion of the second lens, and a relationship among an effective focal length f2 of the second lens, a spacing EP12 of the first spacer element and the second spacer element in the optical axis direction, and a central thickness CT2 of the second lens in the optical axis direction satisfies: -14.21≤f2 / (EP12+CT2)≤-12.41. By restricting f2 / (EP12+CT2) within a reasonable range, the bending length of the mechanism portion 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, and on the premise of ensuring the molding of the second lens, the structural strength of the second lens is improved, the abutment of the second lens to the first lens and the second lens is ensured, and then the assembly stability of the optical imaging lens is improved, so that the optical imaging lens meets the imaging performance and the reliability requirement at the same time.

[0066] In some optional embodiments, the set of spacer elements further comprises a second spacer element located between the second lens and the third lens and in contact with the image-side surface portion of the second lens, and a relationship among an air spacing T23 of the second lens and the third lens in the optical axis direction, and a maximum thickness CP2 of the second spacer element satisfies: 5.15≤T23 / CP2≤8.33. By controlling the air gap of the second lens and the third lens and the maximum thickness of the second spacer, the air space of the light propagating in the air can be reduced, the shape of the object-side surface of the third lens and the image-side surface of the second lens is controlled, the molding difficulty of the second lens and the third lens is reduced, and the stability of the MTF of the optical imaging lens during assembly is improved.

[0067] In some optional embodiments, the set of spacer elements further comprises 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 surface portion of the second lens, the third spacer element is located between the third lens and the fourth lens and contacts the image-side surface portion of the third lens, and the effective focal length f3 of the third lens, the interval EP23 of the second spacer element and the third spacer element in the optical axis direction, and the air interval T34 of the third lens and the fourth lens on the optical axis satisfy: 21.71≤f3 / (EP23+T34)≤47.36. By restricting f3 / (EP23+T34) within a reasonable range, the degree of convergence of light rays by the third lens can be controlled to ensure the imaging quality of the optical imaging lens, while reducing the change in imaging quality caused by the change in air interval, and the distance between the second spacer element and the third spacer element is restricted, which provides more choices for the edge thickness of the third lens and the placement of auxiliary spacer elements between the third lens and the second spacer element, which can more effectively improve the spatial structure, while preventing the phenomenon of unstable support between the image-side surface of the second lens and the object-side surface of the fourth lens, to ensure the imaging stability of the optical imaging lens.

[0068] In some optional embodiments, the set of spacer elements further comprises a third spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image-side surface portion 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 restricting R6 / d3s within a reasonable range, the shape of the third lens can be restricted, which is conducive to the molding of the third lens, while controlling the curvature radius of the image-side surface of the third lens can also reduce the impact of the third lens on the chromatic aberration of the optical imaging lens.

[0069] In some optional embodiments, the set of spacer elements further comprises a third spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image-side surface portion of the third lens, and the air interval T34 of the third lens and the fourth lens on the optical axis, the maximum thickness CP3 of the third spacer element, and the central thickness CT3 of the third lens on the optical axis satisfy: 1.56≤(T34+CP3) / CT3≤2.45. By restricting (T34+CP3) / CT3 within a reasonable range, the structural strength of the third lens can be improved, and the phenomenon of unstable assembly can be reduced, which ensures that the ratio is within a smaller range, and also reduces the problem of stray light caused by the excessive distance between the support position of the fourth lens 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 set of spacer elements further comprises 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 surface portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image-side surface portion of the fourth lens, and the effective focal length f4 of the fourth lens, the interval EP34 of the third spacer element and the fourth spacer element in the optical axis direction satisfy: 16.79≤f4 / EP34≤62.69. By restricting f4 / EP34 within a reasonable range, the central thickness and the edge thickness of the fourth lens can be restricted, preventing the problem of lens breakage due to the edge bearing portion being too thin during assembly, and improving the assembly stability.

[0071] In some optional embodiments, the set of spacer elements further comprises a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image-side surface portion of the fourth lens, and the air interval T45 of the fourth lens and the fifth lens on the optical axis, the central 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 restricting (T45+CP4) / CT4 within a reasonable range, the interval between the fourth lens and the fifth lens and the central thickness of the fourth lens can be restricted, ensuring the structural strength of the fourth lens, while facilitating the stability of the assembly between the fourth lens and the fifth lens, and reducing the risk of interference between the fourth lens and the fifth lens during assembly, and facilitating the improvement of the optical imaging performance.

[0072] In some optional embodiments, the set of spacer elements further comprises a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image-side surface portion of the fourth lens, and the radius of curvature 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 restricting R7*N4 / (D4s-d4s) within a reasonable range, the bearing area between the fourth spacer element and the fourth lens can be controlled, the bearing stability between the fourth spacer element and the fourth lens is ensured, and the degree of deflection of light in the fourth lens can be restricted, ensuring that the imaging light passes smoothly through the fourth spacer element into the rear optical system, and facilitating the reduction of stray light. By restricting the difference between the inner and outer diameters of the fourth spacer element, the shape of the fourth lens and the edge bearing range of the object-side surface of the fifth lens are ensured, the molding difficulty of the fifth lens is reduced, the structural stray light problem caused by the excessive difference in effective focal length between the fourth lens and the fifth lens is avoided, and the lens field curvature during assembly is facilitated.

[0073] According to another aspect of the utility model, an optical imaging lens is provided, including lens barrel and lens group and interval element group set in lens barrel, lens group is composed of five lenses, lens group includes: first lens, second lens, third lens, fourth lens and fifth lens in proper order along the optical axis direction from object side to image side, interval element group includes at least fourth interval element, fourth interval element is located between fourth lens and fifth lens and is contacted with the image side surface part of fourth lens, the air interval T45 of fourth lens and fifth lens on the optical axis, the center thickness CT4 of fourth lens on the optical axis, the maximum thickness CP4 of fourth interval element satisfy: 1.30≤(T45+CP4) / CT4≤3.73, fourth lens has positive focal power, the curvature radius R7 of object side surface of fourth lens, the refractive index N4 of fourth lens, the outer diameter D4s of object side surface of fourth interval element, the inner diameter d4s of object side surface of fourth interval element satisfy: -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 the air gap T45 of the fourth lens and the fifth lens on the optical axis, the central 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, which can constrain the spacing between the fourth lens and the fifth lens and the central thickness of the fourth lens, ensure the structural strength of the fourth lens, and help improve the stability of the assembly between the fourth lens and the fifth lens, while reducing the risk of interference between the fourth lens and the fifth lens during assembly, and improving the optical imaging performance. Because (T45+CP4) is greater than CT4, the air gap between the fourth lens and the fifth lens is relatively large with respect to the central thickness of the fourth lens, the distance of the light propagation between the fourth lens and the fifth lens is too long, which increases the risk of light scattering, and part of the scattered light will be deflected to the optical structure area of the rear optical system, thereby increasing the risk of stray light. 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 of the refractive power of the fourth lens, which can ensure that the light after passing through the fourth lens is in a converging state as a whole, reduce the risk of stray light caused by the large spacing between the fourth lens and the fifth lens, and constrain the angle and refractive index of the light entering the object side of the fourth lens, which is conducive to controlling the deflection degree of the light in the fourth lens, reducing the light with large deflection angle, further reducing the risk of stray light, ensuring that the imaging light smoothly passes through the fourth spacer element into the rear optical system, and controlling the bearing area between the fourth spacer element and the fourth lens, further improving the bearing stability between the fourth spacer element and the fourth lens. By constraining the difference between the inner and outer diameters of the fourth spacer 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 molding difficulty of the fifth lens, avoiding the problem of stray light caused by the large effective thickness difference between the fourth lens and the fifth lens, and helping to adjust the lens field curvature during assembly.

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

[0076] According to another aspect of the utility model, an optical imaging lens is provided, comprising a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group is composed of five lenses, the lens group comprises in sequence along the optical axis direction 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 spacer element group comprises 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 contacts the image side surface part of the first lens, the second spacer element is located between the second lens and the third lens and contacts the image side surface part of the second lens, the effective focal length f2 of the second lens, the interval EP12 of the first spacer element and the second spacer element in the optical axis direction, the central 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 spacer element, the inner diameter d2m of the image side surface of the second spacer element satisfy: 13.75 <= R5*N3 / (D2m-d2m) <= 24.96.

[0077] The optical imaging lens of the 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 of the first spacer element and the second spacer element in the optical axis direction, the central thickness CT2 of the second lens on the optical axis satisfy: -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 intermediate thickness of the second lens are ensured, the structure strength of the second lens is improved on the premise of ensuring the molding of the second lens, the bearing of the second lens to the first lens and the second lens is ensured, and then the assembly stability of the optical imaging lens is improved, so that the optical imaging lens meets the imaging performance and the reliability requirement at the same time. By restricting f2 / (EP12+CT2) within a reasonable range, the deflection degree of the light rays passing through the second lens and the distance of propagation in the second lens can be restricted. Since f2 / (EP12+CT2) is within the range of -14.21 to -12.41, the second lens has a diverging effect on the light rays, resulting in a large exit angle of the light rays after exiting the second lens. The large-angle light rays are easy to enter the optical structure area of the third lens and form stray light, affecting the imaging quality. In order to reduce the generation of such stray light, R5*N3 / (D2m-d2m) is restricted within a reasonable range, so that the deflection angle of the light rays entering the object side surface of the third lens can be controlled, the large-angle light rays are deflected to the optical structure area of the third lens, the multiple reflections at the edge position of the third lens are reduced, the stray light is reduced, the area of the second spacer element shielding the edge of the third lens is controlled, and the stray light entering the optical structure area of the third lens is further reduced, and the generation of stray light is further reduced.

[0078] Of course, other parameter expressions in the above embodiments can also be included in the present embodiment, which will not be repeated here.

[0079] In some optional embodiments, the plurality of lenses described above can have at least one cut-edge lens, the outer periphery of the cut-edge lens can have a cut-edge portion and a non-cut-edge portion, and the outer diameter of the cut-edge portion of the lens is smaller than the outer diameter of the non-cut-edge portion of the lens. When the outer periphery of the lens has a cut-edge portion, the outer diameter of the lens generally refers to the outer diameter of the non-cut-edge portion of the lens.

[0080] In some optional embodiments, the plurality of spacing elements described above can have at least one cut-edge spacing element. The outer periphery of the cut-edge spacing element can have a cut-edge portion and a non-cut-edge portion, and the outer diameter of the cut-edge portion of the cut-edge spacing element is smaller than the outer diameter of the non-cut-edge portion of the cut-edge spacing element. The outer diameter of the spacing element generally refers to the maximum outer diameter that is not cut by the cut-edge portion.

[0081] Optionally, the optical imaging lens described above can further include a protective glass for protecting the 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, which is located on the outer periphery of the central optical effective area and is arranged circumferentially around the central optical effective diameter area. The central optical effective diameter area is used for the passage of imaging light, and the edge structure area is not used for the passage of imaging light, and is used for abutting with the lens barrel or the adjacent lens or the adjacent spacing element. The edge structure area is also called a non-effective diameter area.

[0083] The optical imaging lens in the present application can adopt a plurality of lenses, for example, the five lenses described above. In the present application, at least one of the lens surfaces of each lens is a non-spherical surface. The characteristic of the aspherical lens is that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting the 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 the number of lenses constituting the optical imaging lens can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although the 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 can also include other numbers of lenses.

[0085] Figure 1 The size annotation diagram of one optical imaging lens of the present application is shown,Figure 1 The parameters d1s, d1m, D1s, d2s, d2m, d3s, d4s, D4s, CP1, CP2, CP3, CP4, EP01, EP12, EP23, EP34, etc. are marked in the figures 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, the parameters are no longer embodied in the drawings when the specific embodiments are described below.

[0086] The specific surface shape and parameters of the optical imaging lens applicable to the above embodiments are further described below with reference to the drawings.

[0087] It should be noted that there are two examples, example 1-1 and example 1-2, in the following embodiment one, two examples, example 2-1 and example 2-2, in the second embodiment, two examples, example 3-1 and example 3-2, in the third embodiment, two examples, example 4-1 and example 4-2, in the fourth embodiment. The curvature radius, center thickness, etc. of the first to fifth lenses of the optical imaging lens in the two examples in the same embodiment are the same, but the thickness, inner diameter and outer diameter of the lens barrel, the first spacing element, the second spacing element, the third spacing element and the shape of part of the lenses are different. Or, the main structure for imaging is the same, and the auxiliary structure for imaging is different.

[0088] It should be noted that any of the following embodiments one to four is applicable to all embodiments of the present application.

[0089] Embodiment one

[0090] As shown in Figures 2 to 7 , the optical imaging lens of embodiment one is described. Figure 2 The structure diagram of the optical imaging lens of embodiment 1-1 is shown, Figure 3 The structure diagram of the optical imaging lens of embodiment 1-2 is shown.

[0091] As shown in Figure 2 and Figure 3 , the optical imaging lens includes a lens barrel P0, five lenses and a plurality of spacing elements, the lens barrel includes, in order from the object side to the image side, 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.

[0092] As shown in Figure 2Fig. 1 shows a schematic diagram of the structure of the optical imaging lens of Example 1-1. In this example, the optical imaging lens further comprises a fourth auxiliary spacer element. The object side S1 of the first lens abuts against the lens barrel portion. The object side and image side of the first spacer element P1 partially abut against the image side S2 of the first lens and the object side S3 of the second lens, respectively. The object side and image side of the second spacer element partially abut against the image side S4 of the second lens and the object side S5 of the third lens, respectively. The object side and image side of the third spacer element partially abut against the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and image side of the fourth spacer element partially abut against the image side S8 of the fourth lens and the object side of the fourth auxiliary spacer element, respectively. The image side of the fourth auxiliary spacer element partially abuts against the object side S9 of the fifth lens. The image side S10 of the fifth lens is arranged apart from the lens barrel.

[0093] As shown in Fig. 2, a schematic diagram of the structure of the optical imaging lens of Example 1-2 is shown. In this example, the abutting manner of each spacer element is the same as that of Example 1-1, and the relevant description in Example 1-1 can be referred to, which will not be repeated here. Figure 3

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

[0095] In Example 1, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The object side S3 of the second lens is concave, and the image side S4 of the second lens is convex. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is concave.

[0096] S13 and S14 in Table 2 below can be the surfaces of a filter or protective glass, and S15 is an imaging surface. STO is a stop, which is not shown in the figure.

[0097] Table 2 shows the basic structure parameter table of the optical imaging lens of Example 1, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0098]

[0099] Table 2

[0100] In Example 1, the object side and image side of each of the first lens E1 to the fifth lens E5 are aspherical surfaces. The surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0101] ​

[0102] wherein x is the sag of the aspherical surface at a height h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above; k is the conic constant; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below provides the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used in the aspherical surfaces 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 FIG. 9 shows the axial chromatic aberration curve of the optical imaging lens of Example 1, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 5 FIG. 10 shows the astigmatism curve of the optical imaging lens of Example 1, which represents the meridional image curvature and sagittal image curvature. Figure 6 FIG. 11 shows the distortion curve of the optical imaging lens of Example 1, which represents the distortion size values corresponding to different field angles. Figure 7 FIG. 12 shows the lateral chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0106] According to Figures 4 to 7 It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0107] Example 2

[0108] As Figures 8 to 13 shown, the optical imaging lens of Example 2 is described. Figure 8 FIG. 13 shows a structure diagram of the optical imaging lens of Example 2-1, Figure 9 FIG. 14 shows a structure diagram of the optical imaging lens of Example 2-2.

[0109] As Figure 8 and Figure 9 shown, the optical imaging lens includes a lens barrel P0, five lenses, and a plurality of spacer elements, the lens barrel includes, in order from the object side to the image side, 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.

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

[0111] As shown in Fig. 2-2, the optical imaging lens structure of Example 2-2 is similar to that of Example 2-1. In this example, the abutting manner of each spacer element is the same as that of Example 2-1, and the relevant description in Example 2-1 can be referred to herein. Figure 9

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

[0113] In Example 2, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The object side S3 of the second lens is concave, and the image side S4 of the second lens is convex. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is concave.

[0114] Table 4 shows the basic structure parameters of the optical imaging lens of Example 2, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0115]

[0116] Table 4

[0117] The following Table 5 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspherical surfaces S1-S10 that can be used in Example 2. Each aspherical surface can be defined by the formula (1) given in Example 1.

[0118]

[0119] ​

[0120] Table 5

[0121] Figure 10 The on-axis chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 11 The astigmatism curve of the optical imaging lens of Example Two is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 12 The distortion curve of the optical imaging lens of Example Two is shown, which represents the distortion size values corresponding to different field angles. Figure 13 The magnification chromatic aberration curve of the optical imaging lens of Example Two is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0122] According to Figures 10 to 13 It can be known that the optical imaging lens given in Example Two can achieve good imaging quality.

[0123] Example Three

[0124] As Figures 14 to 19 shown, the optical imaging lens of Example Three is described. Figure 14 The structural schematic diagram of the optical imaging lens of Example 3-1 is shown, Figure 15 The structural schematic diagram of the optical imaging lens of Example 3-2 is shown.

[0125] As Figure 14 and Figure 15 shown, the optical imaging lens includes a lens barrel P0, five lenses and a plurality of interval elements, the lens barrel includes, in order from the object side to the image side, a first lens E1, a first interval element P1, a second lens E2, a second interval element P2, a third lens E3, a third interval element P3, a fourth lens E4, a fourth interval element P4, and a fifth lens E5.

[0126] As Figure 14Fig. 3-1 shows a schematic diagram of the optical imaging lens of Example 3-1. In this example, the optical imaging lens further comprises a fourth auxiliary spacer element. The object side S1 of the first lens abuts against the lens barrel portion. The object side and image side of the first spacer element P1 abut against the lens barrel portion S3. The object side and image side of the second spacer element abut against the image side S4 of the second lens and the image side S2 of the first lens, respectively. The object side and image side of the third spacer element abut against the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and image side of the fourth spacer element abut against the image side S8 of the fourth lens and the object side of the fourth auxiliary spacer element, respectively. The image side of the fourth auxiliary spacer element abuts against the object side S9 of the fifth lens. The image side S10 of the fifth lens is spaced apart from the lens barrel portion.

[0127] As shown in Fig. 3-2, the optical imaging lens of Example 3-2 has the same structure as that of Example 3-1. The abutting manner of each spacer element is the same as that of Example 3-1. The relevant description in Example 3-1 is referred to here and will not be repeated. Figure 15

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

[0129] In Example 3, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The object side S3 of the second lens is concave, and the image side S4 of the second lens is convex. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is concave.

[0130] Table 6 shows the basic structure parameters of the optical imaging lens of Example 3, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0131]

[0132] Table 6

[0133] The following Table 7 shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 of the aspherical surfaces S1-S10 that can be used in Example 3. Each aspherical surface can be defined by the formula (1) given in Example 1.

[0134]

[0135] ​

[0136] Table 7

[0137] Figure 16 On-axis chromatic aberration curves of the optical imaging lens of embodiment three are shown, which represent the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 17 Astigmatism curves of the optical imaging lens of embodiment three are shown, which represent the meridional image curvature and sagittal image curvature. Figure 18 Distortion curves of the optical imaging lens of embodiment three are shown, which represent the distortion size values corresponding to different field angles. Figure 19 Magnification chromatic aberration curves of the optical imaging lens of embodiment three are shown, which represent the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0138] According to Figures 16 to 19 It can be known that the optical imaging lens given in embodiment three can achieve good imaging quality.

[0139] Embodiment four

[0140] As Figures 20 to 25 shown, the optical imaging lens of embodiment four is described. Figure 20 A structural schematic diagram of the optical imaging lens of embodiment 4-1 is shown, Figure 21 A structural schematic diagram of the optical imaging lens of embodiment 4-2 is shown.

[0141] As Figure 20 and Figure 21 shown, the optical imaging lens includes a lens barrel P0, five lenses and a plurality of interval elements, the lens barrel includes, in order from the object side to the image side, a first lens E1, a first interval element P1, a second lens E2, a second interval element P2, a third lens E3, a third interval element P3, a fourth lens E4, a fourth interval element P4, and a fifth lens E5.

[0142] As Figure 20As shown in Fig. 4-1, it is a structure schematic diagram of the optical imaging lens in Embodiment 4-1. In this example, the optical imaging lens further comprises a fourth auxiliary spacer element. The object side S1 of the first lens abuts against the lens barrel part. The object side and image side of the first spacer element P1 abut against the lens barrel part S3 part respectively. The object side and image side of the second spacer element abut against the image side S4 of the second lens and the image side S2 of the first lens respectively. The object side and image side of the third spacer element abut against the image side S6 of the third lens and the object side S7 of the fourth lens respectively. The object side and image side of the fourth spacer element abut against the image side S8 of the fourth lens and the object side of the fourth auxiliary spacer element part respectively. The image side of the fourth auxiliary spacer element abuts against the object side S9 of the fifth lens. The image side S10 of the fifth lens is arranged apart from the lens barrel.

[0143] As shown in Fig. 4-2, it is a structure schematic diagram of the optical imaging lens in Embodiment 4-2. In this example, the abutting abutting mode of each spacer element is the same as that in Embodiment 4-1, and the related description in Embodiment 4-1 can be referred to, which will not be repeated here. Figure 21

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

[0145] In Embodiment 4, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The object side S3 of the second lens is concave, and the image side S4 of the second lens is convex. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is convex. The object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is concave.

[0146] Table 8 shows the basic structure parameter table of the optical imaging lens in Embodiment 4, wherein the units of the curvature radius and the thickness / distance are millimeters (mm).

[0147]

[0148] Table 8

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

[0150]

[0151] ​

[0152] Table 9

[0153] Figure 22 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment Four is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical imaging lens. Figure 23 The astigmatism curve of the optical imaging lens of Embodiment Four is shown, which represents the meridional image curvature and sagittal image curvature. Figure 24 The distortion curve of the optical imaging lens of Embodiment Four is shown, which represents the distortion size value corresponding to different field angles. Figure 25 The lateral chromatic aberration curve of the optical imaging lens of Embodiment Four is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0154] According to Figures 22 to 25 It can be seen that the optical imaging lens given in Embodiment Four can achieve good imaging quality.

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

[0156] Conditional expression / Embodiment 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 part of the parameters (in mm) of the optical imaging lenses of Embodiments One to Four.

[0159]

[0160]

[0161] Table 11

[0162] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a separate imaging equipment such as a digital camera, or an imaging module integrated on 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 application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application.

[0164] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0165] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an either chronological or spatial relation to each other, but are used merely to distinguish a different single implementation from another unless specifically indicated otherwise. It should be understood that the use of the term "or" in the context of describing example embodiments is used to mean a selection of one or more of the alternatives. For example, the phrase "A / B or C" is satisfied by any one of the following alternatives: [A and B] or [C].

[0166] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not limited to those embodiments; instead, they will include any changes that do not constitute departures from the spirit and scope of the present application.

Claims

1. An optical imaging lens, characterized in that, The lens barrel includes a lens barrel body, a lens group and a spacer element group arranged in the lens barrel body, The lens group is composed of five lenses, and sequentially includes, from an object side to an image side along an optical axis direction, a first lens, a second lens, a third lens, a fourth lens and a fifth lens, 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 partially contacts an image side surface of the first lens; An air interval T12 of the first lens and the second lens on the optical axis, a maximum thickness CP1 of the first spacer element satisfy: 2.67≤T12 / CP1≤3.45; A curvature radius R3 of the object side surface of the second lens, an inner diameter d1m of the image side surface of the first spacer element satisfy: -2.76≤R3 / d1m≤-2.

14. 2.The optical imaging lens according to claim 1, wherein, The first lens has a positive refractive power, an effective focal length f1 of the first lens, a maximum thickness CP1 of the first spacer element, a distance EP01 of an object side end surface of the lens barrel body and an object side surface of the first spacer element in the optical axis direction 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, a curvature radius R2 of the image side surface of the first lens, 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 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, 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, a curvature radius R4 of the image side surface of the second lens, an 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, characterized in that, The object side surface of the third lens is a convex surface, 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, a curvature radius R5 of the object side surface of the third lens, an inner diameter d2m of the image side surface of the second spacer element satisfy: 14.84≤R5 / d2m≤21.

13. 6.The optical imaging lens according to claim 1, wherein, The second lens has a negative refractive power, 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, an effective focal length f2 of the second lens, an interval EP12 of the first spacer element and the second spacer element in the optical axis direction, a central 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 further includes a second spacer element located between the second lens and the third lens and in contact with an image side surface portion of the second lens, and an air gap T23 of the second lens and the third lens on the optical axis, a maximum thickness CP2 of the second spacer element satisfy: 5.15 ≤ T23 / CP2 ≤ 8.

33. 8.The optical imaging lens according to claim 1, wherein, The third lens has positive refractive power, 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 in contact with an image side surface portion of the second lens, the third spacer element is located between the third lens and the fourth lens and in contact with an image side surface portion of the third lens, an effective focal length f3 of the third lens, a distance EP23 of the second spacer element and the third spacer element in the direction of the optical axis, an air gap T34 of 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, An image side surface of the third lens is convex, 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 in contact with an image side surface portion of the third lens, a curvature radius R6 of the image side surface of the third lens, an inner diameter d3s of an object side surface of the third spacer element satisfy: -36.54 ≤ R6 / d3s ≤ -12.

01. 10.The optical imaging lens according to claim 1, wherein, 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 in contact with an image side surface portion of the third lens, an air gap T34 of the third lens and the fourth lens on the optical axis, a maximum thickness CP3 of the third spacer element, a central thickness CT3 of the third lens on the optical axis satisfy: 1.56 ≤ (T34+CP3) / CT3 ≤ 2.

45.

11. The optical imaging lens according to any one of claims 1-10, wherein, The fourth lens has positive refractive power, 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 in contact with an image side surface portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and in contact with an image side surface portion of the fourth lens, an effective focal length f4 of the fourth lens, a distance EP34 of the third spacer element and the fourth spacer element in the direction of the optical axis satisfy: 16.79 ≤ f4 / EP34 ≤ 62.

69. 12.The optical imaging lens according to any one of claims 1 to 10, wherein, 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 in contact with an image side surface portion of the fourth lens, an air gap T45 of the fourth lens and the fifth lens on the optical axis, a central thickness CT4 of the fourth lens on the optical axis, a maximum thickness CP4 of the fourth spacer element satisfy: 1.30 ≤ (T45+CP4) / CT4 ≤ 3.

73.

13. The optical imaging lens according to any one of claims 1-10, wherein, A concave object side surface of the fourth lens, the set of spacer elements further comprises a fourth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and partially contacts an image side surface of the fourth lens, a radius of curvature 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, an inner diameter d4s of the object side surface of the fourth spacer element satisfy: -5.39≤R7*N4 / (D4s-d4s)≤-3.

11. 14.The optical imaging lens according to any one of claims 1 to 10, wherein, The optical imaging lens satisfies at least one of the following: ​ 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 a negative refractive 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