Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a spacing element group, the lens group and the spacing element group are arranged in the lens barrel, the lens group is composed of six lenses, and the six lenses are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side; the spacing element group comprises a first spacing element, a second spacing element and a third spacing element; the formula is as follows: 0.30 lt; (T12 + T23) / CT2 < = 0.80; the formula is as follows: 3.90 degrees / mmlt; the method comprises the following steps: carrying out FOV / Llt; 4.95 degrees / mm; 0.75 lt is satisfied; (EP01 + EP23) / EP12lt; and 1.17. According to the utility model, the problem that the imaging performance is influenced because the sensitivity of the lens is increased due to the fact that a six-piece optical imaging lens in the prior art meets the wide-angle requirement is solved.

Description

Technical Field

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

[0002] With the rapid development of electronic technology, portable electronic devices such as smartphones, tablets, dashcams, and action cameras have become increasingly common. These devices place higher demands on the optical imaging lenses they carry, especially in terms of wide-angle imaging.

[0003] To achieve a wide field of view, a deep depth of field, and clear details of the entire scene, the demand for wide-angle optical imaging lenses is increasing. Taking a six-element optical imaging lens as an example, current six-element optical imaging lenses typically increase the thickness and size of the lenses to meet wide-angle characteristics. The increase in the overall size of the lens can easily lead to an increase in lens sensitivity, which can affect the peak performance and field curvature of the optical imaging lens, thus affecting imaging performance and ultimately resulting in poor image quality.

[0004] In other words, existing six-element optical imaging lenses suffer from increased lens sensitivity to meet wide-angle requirements, which in turn affects imaging performance. Utility Model Content

[0005] The main objective of this invention is to provide an optical imaging lens to solve the problem that existing six-element optical imaging lenses suffer from increased lens sensitivity due to wide-angle requirements, which in turn affects imaging performance.

[0006] In order to achieve the above object, according to one aspect of the present invention, an optical imaging lens is provided, which includes a lens barrel, a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of six lenses, and the six lenses are, in order from the object side to the image side, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens; the spacer element group includes a first spacer element disposed on the image side of the first lens and at least partially contacting the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and at least partially contacting the image side surface of the second lens, and a third spacer element disposed on the image side of the third lens and at least partially contacting the image side surface of the third lens; the air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis and the central thickness CT2 of the second lens satisfy: 0.30 < (T12 + T23) / CT2 ≤ 0.80; the half of the maximum field angle Semi-FOV of the optical imaging lens and the maximum axial height L of the lens barrel satisfy: 3.90° / mm < Semi-FOV / L < 4.95° / mm; the interval distance EP01 along the optical axis direction from the object side surface of the lens barrel to the object side surface of the first spacer element, the interval distance EP23 along the optical axis direction between the second spacer element and the third spacer element and the interval distance EP12 along the optical axis direction between the first spacer element and the second spacer element satisfy: 0.75 < (EP01 + EP23) / EP12 < 1.17.

[0007] According to another aspect of the present utility model, an optical imaging lens is provided, which includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group consists of six lenses. The six lenses are, in order from the object side to the image side, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is concave, and the image side surface is convex; the object side surface of the third lens is convex, and the image side surface is convex; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is convex; the image side surface of the sixth lens is concave; the spacer element group includes a first spacer element disposed on the image side of the first lens and at least partially contacting the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and at least partially contacting the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and at least partially contacting the image side surface of the third lens, and a fourth spacer element disposed on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens; between the effective focal length f2 of the second lens, the axial distance EP12 from the first spacer element to the second spacer element, and the central thickness CT2 of the second lens, the following is satisfied: 7.05mm < f2 / (EP12 / CT2) < 16.40mm; between the effective focal length f4 of the fourth lens, the object side outer diameter D4s and the object side inner diameter d4s of the fourth spacer element, the following is satisfied: -0.95 < f4 / (D4s - d4s) < -0.70; between the effective focal length f3 of the third lens, the central thickness CT3 of the third lens, and the object side outer diameter D3s of the third spacer element, 0.15mm -1 <f3 / CT3 / D3s < 0.35mm -1 .

[0008] Applying the technical solution of the present utility model, the optical imaging lens of the present application consists of a lens barrel and six lenses and multiple spacer elements arranged in the lens barrel. By reasonably arranging the positions of the six lenses, the first spacer element, the second spacer element, and the third spacer element and setting the optical imaging lens to satisfy 0.30 < (T12 + T23) / CT2 ≤ 0.80 and 3.90° / mm < Semi-FOV / L < 4.95° / mm, the characteristics of a wide angle can be satisfied. However, the central thickness of the second lens is relatively large. As the front-end lens, the increase in its size leads to an increase in its sensitivity, which has a greater impact on the performance of the optical imaging lens. Therefore, by restricting 0.75 < (EP01 + EP23) / EP12 < 1.17, it is beneficial to restrict the edge thicknesses of the first lens, the second lens, and the third lens, and further control the edge thickness of the second lens and the thickness ratio between the central effective diameter region and the edge structure region of the second lens, reducing the optical sensitivity of the second lens, such as the influence on eccentricity, tilt, surface shape, etc., improving the peak value of the MTF defocus curve, making the field curvature more concentrated, increasing the imaging performance, and ensuring the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The specification drawings forming a part of the present application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0010] Figure 1 The dimension marking diagram of the optical imaging lens of an optional embodiment of the present utility model is shown;

[0011] Figure 2 The dimension marking diagram of the optical imaging lens of an optional embodiment of the present utility model is shown;

[0012] Figure 3 The structural schematic diagram of the optical imaging lens of Embodiment 1-1 of the present utility model is shown;

[0013] Figure 4 The structural schematic diagram of the optical imaging lens of Embodiment 1-2 of the present utility model is shown;

[0014] Figure 5 The structural schematic diagram of the optical imaging lens of Embodiment 1-3 of the present utility model is shown;

[0015] Figure 6 and Figure 7 respectively show the axial chromatic aberration curve and the astigmatism curve of the optical imaging lens of Embodiment 1 of the present utility model;

[0016] Figure 8 The structural schematic diagram of the optical imaging lens of Embodiment 2-1 of the present utility model is shown;

[0017] Figure 9 A schematic diagram of the structure of the optical imaging lens of Embodiment 2-2 of this utility model is shown;

[0018] Figure 10 A schematic diagram of the structure of the optical imaging lens of Embodiments 2-3 of this utility model is shown;

[0019] Figure 11 and Figure 12 The on-axis chromatic aberration curve and astigmatism curve of the optical imaging lens of Embodiment 2 of this utility model are shown respectively.

[0020] Figure 13 A schematic diagram of the structure of the optical imaging lens of Embodiment 3-1 of this utility model is shown;

[0021] Figure 14 A schematic diagram of the structure of the optical imaging lens of Embodiment 3-2 of this utility model is shown;

[0022] Figure 15 A schematic diagram of the structure of the optical imaging lens of Embodiment 3-3 of this utility model is shown;

[0023] Figure 16 and Figure 17 The on-axis chromatic aberration curve and astigmatism curve of the optical imaging lens of Embodiment 3 of this utility model are shown respectively.

[0024] Figure 18 A schematic diagram of the structure of the optical imaging lens of Embodiment 4-1 of this utility model is shown;

[0025] Figure 19 A schematic diagram of the structure of the optical imaging lens of Embodiment 4-2 of this utility model is shown;

[0026] Figure 20 A schematic diagram of the structure of the optical imaging lens of Embodiment 4-3 of this utility model is shown;

[0027] Figure 21 and Figure 22 The on-axis chromatic aberration curve and astigmatism curve of the optical imaging lens of Embodiment 4 of this utility model are shown respectively.

[0028] Figure 23 and Figure 24 Wavefront tolerance sensitivity analysis curves and MTF defocus curves are shown for an optical imaging lens that satisfies (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=0.5, respectively.

[0029] Figure 25 and Figure 26 The wavefront tolerance sensitivity analysis curves and MTF defocus curves of an optional embodiment of the optical imaging lens of this utility model are shown respectively when (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=0.96;

[0030] Figure 27 and Figure 28 Wavefront tolerance sensitivity analysis curves and MTF defocus curves are shown for another optical imaging lens that satisfies (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=1.5.

[0031] The above figures include the following reference numerals:

[0032] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; E6, Sixth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens; P1, First spacer element; P2, Second spacer element; P3, Third spacer element; P4, Fourth spacer element; P5, Fifth spacer element. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0037] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0038] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method commonly known in the art, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object side, 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; for the image side, 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 this application, the left side is the object side, and the right side is the image side.

[0039] To address the problem that existing six-element optical imaging lenses suffer from increased lens sensitivity due to wide-angle requirements, thus affecting imaging performance, this invention provides an optical imaging lens.

[0040] like Figures 1 to 28As shown, in an optional embodiment of the present application, the optical imaging lens includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group consists of six lenses. The six lenses are, in order from the object side to the image side, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens. The spacer element group includes a first spacer element disposed on the image side of the first lens and at least partially contacting the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and at least partially contacting the image side surface of the second lens, and a third spacer element disposed on the image side of the third lens and at least partially contacting the image side surface of the third lens. The air gap T12 between the first lens and the second lens on the optical axis of the optical imaging lens, the air gap T23 between the second lens and the third lens on the optical axis, and the central thickness CT2 of the second lens satisfy: 0.30 < (T12 + T23) / CT2 ≤ 0.80. The half of the maximum field angle Semi-FOV of the optical imaging lens and the maximum axial height L of the lens barrel satisfy: 3.90° / mm < Semi-FOV / L < 4.95° / mm. The interval distance EP01 from the object side surface of the lens barrel to the object side surface of the first spacer element, the interval distance EP23 from the second spacer element to the third spacer element in the optical axis direction, and the interval distance EP12 from the first spacer element to the second spacer element in the optical axis direction satisfy: 0.75 < (EP01 + EP23) / EP12 < 1.17.

[0041] The optical imaging lens of the present application consists of a lens barrel, six lenses, and multiple spacer elements disposed in the lens barrel. By reasonably arranging the positions of the six lenses, the first spacer element, the second spacer element, and the third spacer element and setting the optical imaging lens to satisfy 0.30 < (T12 + T23) / CT2 ≤ 0.80 and 3.90° / mm < Semi-FOV / L < 4.95° / mm, the characteristics of a wide angle can be satisfied. However, the central thickness of the second lens is relatively large. As the front lens, the increase in its size leads to an increase in its sensitivity, which has a greater impact on the performance of the optical imaging lens. Therefore, by restricting 0.75 < (EP01 + EP23) / EP12 < 1.17, it is beneficial to restrict the edge thicknesses of the first lens, the second lens, and the third lens, and further control the edge thickness of the second lens and the thickness ratio between the central effective diameter region and the edge structure region of the second lens, reduce the optical sensitivity of the second lens, such as the influence on eccentricity, tilt, surface shape, etc., increase the peak value of the MTF defocus curve, make the field curvature more concentrated, improve the imaging performance, and ensure the imaging quality.

[0042] In addition, in the present application, the spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens and a fifth spacer element disposed on the image side of the fifth lens and at least partially contacting the image side surface of the fifth lens.

[0043] In addition, please refer to Table 1 below and Figures 23 to 28 As shown, Figure 23 and Figure 24 Wavefront tolerance sensitivity analysis curves and MTF defocus curves are shown respectively when the optical imaging lens satisfies (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=0.5. Figure 25 and Figure 26 Wavefront tolerance sensitivity analysis curves and MTF defocus curves are shown respectively when the optical imaging lens satisfies (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=0.96. Figure 27 and Figure 28 Wavefront tolerance sensitivity analysis curves and MTF defocus curves are shown respectively when the optical imaging lens satisfies (T12+T23) / CT2=0.41, Semi-FOV / L=4.90° / mm and (EP01+EP23) / EP12=1.5.

[0044] Depend on Figure 23 and Figure 24 It can be seen that when (EP01+EP23) / EP12=0.5, the light beam from the third lens becomes steeper, the overall field curvature is larger, the peak value of most fields in the MTF defocus curve is lower, and it is more sensitive to eccentricity and tilt, resulting in poor performance. Figure 25 and Figure 26 It can be seen that when (EP01+EP23) / EP12=0.96, the edge thickness of the second and third lenses is moderate, the MTF defocus curve is relatively concentrated, the peak value of most fields of view is high, the optical sensitivity is low, and the performance is good. Figure 27 and Figure 28 It can be seen that when (EP01+EP23) / EP12 = 1.5, the sensitivity of the edge surface shape of the second lens increases, the MTF peak value decreases, and most of the field curvature is significantly positive, resulting in poor performance. Therefore, it is evident that when (EP01+EP23) / EP12 is within the range of 0.75 to 1.15, the tolerance sensitivity curve and MTF defocus curve of the optical imaging lens exhibit optimal performance. Therefore, this application constrains the edge thickness of the first, second, and third lenses by limiting 0.75 < (EP01+EP23) / EP12 < 1.17, controlling the edge thickness of the second lens within a reasonable range. This reduces the optical sensitivity of the second lens, such as eccentricity, tilt, and surface shape, thereby increasing the peak value of the MTF defocus curve, making the field curvature more concentrated, improving imaging performance, and ensuring image quality.

[0045] Table 1

[0046]

[0047] In this embodiment, the central thickness CT2 of the second lens, the central thickness CT3 of the third lens, the central thickness CT5 of the fifth lens, and the maximum axial height L of the lens barrel satisfy: 0.44 < (CT2 + CT3 + CT5) / L < 0.60; the object-side outer diameter D5s of the fifth spacer element and the object-side outer diameter D1s of the first spacer element satisfy: 1.05 < D5s / D1s < 1.40. By controlling the central thicknesses of the second lens, the third lens, and the fifth lens on the optical axis, the space occupation ratio of each lens in the optical imaging lens is controlled. At the same time, by controlling the relationship between the object-side outer diameter of the fifth spacer element and the object-side outer diameter of the first spacer element within a certain range, the step difference from the object side to the image side of the optical imaging lens can be constrained in cooperation with the lenses, and the overall size of the optical imaging lens can be controlled.

[0048] In this embodiment, the distance EP01 along the optical axis between the object-side surface of the lens barrel and the object-side surface of the first spacer element and the distance SAG01 along the optical axis between the intersection of the object-side surface of the first lens and the optical axis and the object-side surface of the lens barrel satisfy: 1.35 < EP01 / SAG01 < 9.55. By controlling this condition, the strength of the surface where the object side of the first lens abuts against the lens barrel can be ensured, thereby ensuring the assembly stability of the optical imaging lens. At the same time, the edge thickness of the first lens is also ensured, making the first lens more conducive to molding. Within this control range, the problem that the object-side surface of the first lens protrudes from the lens barrel and scratches the lens is also avoided.

[0049] In the present embodiment, the sum ∑AT of the air gaps between any two adjacent lenses among the first lens to the sixth lens on the optical axis satisfies 0.10 < ∑AT / L < 0.35 with respect to the maximum axial height L of the lens barrel; the sum ∑AT of the air gaps between adjacent lenses among the first lens to the sixth lens on the optical axis satisfies 1.35 < ∑AT / ∑CP < 21.65 with respect to the sum ∑CP of the maximum thicknesses of all spacer elements. By controlling the sum of the air gaps between all adjacent two lenses on the optical axis within a certain range, the maximum axial height of the lens barrel can be controlled to a reasonable size, minimizing the length of the entire optical imaging lens as much as possible. Controlling the sum of the maximum thicknesses of all spacer elements is for two purposes. On the one hand, it is to reduce the overall length of the optical imaging lens. On the other hand, it is to avoid the situation where the tolerance of the relatively thick spacer elements is too large, which may cause the lens to protrude from the bottom surface of the lens barrel when all lenses and all spacer elements are at their limit tolerances during assembly, thus avoiding the risk of scratches to the lens during assembly and transportation. It should be noted here that all the above-mentioned spacer elements specifically refer to all the spacer elements in the entire optical imaging lens, including specifically the first spacer element to the fifth spacer element and all auxiliary spacer elements. Preferably, 1.35 < ∑AT / ∑CP < 2.75.

[0050] It should be noted that the maximum axial height L of the lens barrel is specifically the distance on the optical axis of the optical imaging lens from the object side of the lens barrel to the image side of the lens barrel.

[0051] In the present embodiment, the radius of curvature R4 of the image side of the second lens, the refractive index N2 of the second lens, and the interval distance EP12 between the first spacer element and the second spacer element in the optical axis direction satisfy: -3.70 ≤ R4×N2 / EP12 < -2.25. By controlling this conditional expression, it is possible to reduce distortion, reasonably control the total deflection angle of the marginal field light rays on the surfaces of the second lens and the third lens within a reasonable range, and at the same time effectively reduce the sensitivity of the entire optical system.

[0052] In the present embodiment, the object-side outer diameter D4s of the fourth spacer element, the effective focal length f4 of the fourth lens, and the radius of curvature R8 of the image side of the fourth lens satisfy: -5.45 mm < D4s / (f4 / R8) < -4.85 mm. By controlling this condition, the influence of the fourth lens on the light ray process can be effectively controlled, keeping the light ray angles in the marginal field within a reasonable range. Combining with the object-side outer diameter of the fourth spacer element, the marginal light rays can be effectively absorbed.

[0053] In this embodiment, the effective focal length f4 of the fourth lens, the object-side outer diameter D4s and the object-side inner diameter d4s of the fourth spacer element satisfy: -0.95 < f4 / (D4s - d4s) ≤ -0.70. By reasonably controlling the relationship between the effective focal length of the fourth lens and the difference between the object-side outer and inner diameters of the fourth spacer element within a certain range, the positive third-order spherical aberration and the posterior fifth-order spherical aberration generated by the front and rear optical elements can be reasonably balanced, which is beneficial to improving the imaging quality of the on-axis field of view.

[0054] In this embodiment, the maximum outer diameter OD1 of the first lens and the maximum outer diameter OD2 of the second lens satisfy: 18.00 < OD1 / (OD2 - OD1) < 23.00. By controlling the maximum outer diameters of the first lens and the second lens, the aperture size at the front end of the optical imaging lens can be ensured. While ensuring the uniform wall thickness of the lens barrel, the head space of the lens can be made smaller, which is beneficial to the miniaturized design of the optical imaging lens.

[0055] In this embodiment, the effective focal length f2 of the second lens, the central thickness CT2 of the second lens and the object-side outer diameter D2s of the second spacer element satisfy: 0.28mm -1 < f2 / CT2 / D2s < 0.90mm -1 . By controlling the effective focal length of the second lens, the light path inside the lens can be better controlled. By controlling the central thickness of the second lens and the object-side outer diameter of the second spacer element, the overall thickness of the second lens can be made more uniform and reasonable. While ensuring better molding, it can prevent the ineffective light path outside the aspheric surface edge from entering the subsequent optical system, reduce the generation and intensity of stray light, and improve the imaging quality.

[0056] In this embodiment, the effective focal length f3 of the third lens, the central thickness CT3 of the third lens and the object-side outer diameter D3s of the third spacer element satisfy: 0.15mm -1 < f3 / CT3 / D3s < 0.35mm -1 . By controlling this condition, while ensuring the additivity of the third lens, the ghost image generated by the third lens can be effectively improved, which is beneficial to reducing the overall stray light of the optical imaging lens.

[0057] In this embodiment, the first lens has negative optical power, the second lens has positive optical power, the third lens has positive optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, and the sixth lens has negative optical power. The object-side surface of the first lens is convex, and the image-side surface is concave; the object-side surface of the second lens is concave, and the image-side surface is convex; the object-side surface of the third lens is convex, and the image-side surface is convex; the object-side surface of the fourth lens is convex, and the image-side surface is concave; the object-side surface of the fifth lens is convex, and the image-side surface is convex; and the image-side surface of the sixth lens is concave. By rationally planning the optical power and surface shape of each lens, the light rays passing through the first lens, intermediate lenses, and last lens can be controlled more effectively, which is beneficial for avoiding ghosting. At the same time, the overall structure of the optical imaging lens is more rational, the lens barrel wall thickness is more uniform, the manufacturing difficulty of the lens barrel is reduced, and the stability of the optical imaging lens is improved.

[0058] In this embodiment, the spacing distance EP45 between the fourth and fifth spacers along the optical axis, the maximum thickness CP4 of the fourth spacer, the maximum thickness CP5 of the fifth spacer, and the center thickness CT4 of the fourth lens satisfy the following condition: -0.20 < (EP45 - CP4 - CP5) / CT4 < 3.70. By controlling the relationship between the fourth lens and the fourth spacer, an optimal support position can be adopted for the fourth lens to improve assembly stability and reduce the field curvature change of the external field of view after high temperature and high humidity. By controlling the maximum thickness of the fifth spacer and the center thickness of the fourth lens, the edge thickness and outer diameter of the lens can be effectively controlled, improving the limiting process during lens production, thereby improving the assembly stability and optical performance of the optical imaging lens. Preferably, 0.30 < (EP45 - CP4 - CP5) / CT4 < 3.70.

[0059] In this embodiment, the center thicknesses CT2, CT5, CT3, and CT4 of the second lens satisfy the following ratio: 1.70 < (CT2 + CT5) / (CT3 + CT4) < 2.40; the spacing distances EP23 between the second and third spacers along the optical axis, EP34 between the third and fourth spacers along the optical axis, and EP45 between the fourth and fifth spacers along the optical axis satisfy the following ratio: 1.35 < (EP23 + EP34) / EP45 < 2.45. By reasonably controlling the center thickness of each lens, the thickness ratio of the lens itself is ensured to be within a certain range, which is beneficial for shaping, and the convergence trend of incident light passing through each lens is also ensured, so that the main ray in the incident light is transmitted in each lens according to a predetermined path; controlling the distance between each spacer can effectively block the excess light path between the effective diameters of the aspherical surfaces, reduce the risk of stray light, and improve the imaging quality of the entire optical imaging lens.

[0060] Optionally, the optical imaging lens in the embodiments of the present application can be simulated through software and / or tools such as ZEMAX, CODEV, etc. During the simulation using the software and / or tools as described above, the surface profiles of each lens can be appropriately adjusted according to the built-in surface profiles of the software and / or tools used.

[0061] In addition, in another optional embodiment of the present application, an optical imaging lens is further provided. The optical imaging lens includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel. The lens group is composed of six lenses. The six lenses are, in order from the object side to the image side, a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, a fifth lens with a positive optical power, and a sixth lens with a negative optical power; the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is concave, and the image side surface is convex; the object side surface of the third lens is convex, and the image side surface is convex; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is convex; the image side surface of the sixth lens is concave; the spacer element group includes a first spacer element disposed on the image side of the first lens and at least partially contacting the image side surface of the first lens, a second spacer element disposed on the image side of the second lens and at least partially contacting the image side surface of the second lens, a third spacer element disposed on the image side of the third lens and at least partially contacting the image side surface of the third lens, and a fourth spacer element disposed on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens; between the effective focal length f2 of the second lens, the spacing distance EP12 between the first spacer element and the second spacer element along the optical axis direction, and the central thickness CT2 of the second lens, it satisfies: 7.05mm < f2 / (EP12 / CT2) < 16.40mm; between the effective focal length f4 of the fourth lens, the object side outer diameter D4s and the object side inner diameter d4s of the fourth spacer element, it satisfies: -0.95 < f4 / (D4s - d4s) < -0.70; between the effective focal length f3 of the third lens, the central thickness CT3 of the third lens, and the object side outer diameter D3s of the third spacer element, it satisfies: 0.15mm -1 <f3 / CT3 / D3s < 0.35mm -1 .

[0062] The optical imaging lens of the present application is composed of a lens barrel and six lenses and multiple spacer elements disposed in the lens barrel. By reasonably distributing the optical powers and surface profiles of the six lenses, the positions of the first spacer element to the fourth spacer element, and setting the optical imaging lens to satisfy 7.05mm < f2 / (EP12 / CT2) < 16.40mm, -0.95 < f4 / (D4s - d4s) < -0.70, and 0.15mm -1<f3 / CT3 / D3s<0.35mm -1 This allows for reasonable constraints on the thickness of the second lens, as well as the thickness ratio between the effective central diameter region and the edge structural region of the second lens, thereby reducing its optical sensitivity. By reasonably controlling the relationship between the effective focal length of the fourth lens and the difference between the object-side inner and outer diameters of the fourth spacer element within a certain range, the positive third-order spherical aberration and the rear fifth-order spherical aberration generated by the front and rear optical elements can be reasonably balanced, which is beneficial to improving the imaging quality of the on-axis field of view. By controlling the effective focal length of the third lens, the ratio of the center thickness of the third lens to the object-side outer diameter of the third spacer element, while ensuring the additivity of the third lens, the ghosting produced by the third lens can be effectively improved, which is beneficial to improving the overall stray light quality of the optical imaging lens.

[0063] Of course, this embodiment may also include other parametric expressions as described in the above embodiments, which will not be elaborated here.

[0064] Optionally, the aforementioned optical imaging lens may also include protective glass for protecting the photosensitive element located on the imaging surface.

[0065] The optical imaging lens in this application may employ multiple lenses, such as the six lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality.

[0066] However, those skilled in the art will understand that the number of lenses constituting the optical imaging lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although six lenses have been described as an example in the embodiments, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0067] Figure 1 and Figure 2 A schematic diagram showing the dimensions of an optical imaging lens according to this application is provided. Figure 1 The winning bid specifies parameters such as D5s, D4s, D3s, D2s, D1s, d4s, EP01, EP12, EP23, EP34, L, CP4, EP45, and CP5. Figure 2OD1, OD2, and SAG01 are indicated to clearly and intuitively explain the meaning of these parameters. To facilitate the description of optical imaging lenses and specific lens shapes, these parameters will not be shown in the accompanying drawings when describing specific embodiments.

[0068] The following description, with reference to the accompanying drawings, further illustrates specific surface shapes and parameters of optical imaging lenses applicable to the above embodiments. It should be noted that in Embodiment 1, there are three examples: Embodiment 1-1, Embodiment 1-2, and Embodiment 1-3; in Embodiment 2, there are three examples: Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3; in Embodiment 3, there are three examples: Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3; and in Embodiment 4, there are three examples: Embodiment 4-1, Embodiment 4-2, and Embodiment 4-3. In the three examples within the same embodiment, the curvature radius, center thickness, and other parameters of the first to sixth lenses, as well as the inter-lens spacing and higher-order coefficients, are the same. However, the thickness, inner diameter, and outer diameter of the lens barrel, the first spacer element, and the fifth spacer element are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0069] It should be noted that any one of the examples in Embodiments 1 to 4 described below is applicable to all embodiments of this application.

[0070] Example 1

[0071] like Figures 3 to 7 As shown, the optical imaging lens of Embodiment 1 is described. Figure 3 A schematic diagram of the optical imaging lens of Embodiment 1-1 is shown. Figure 4 The diagram shows the structure of the optical imaging lens in Embodiments 1-2. Figure 5 A schematic diagram of the optical imaging lens of Embodiments 1-3 is shown.

[0072] like Figures 3 to 5 As shown, the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fourth auxiliary spacer P4b, a fifth lens E5, a fifth spacer P5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0.

[0073] like Figure 3The diagram shows a schematic of the optical imaging lens in Embodiment 1-1. In this example, the object-side and image-side surfaces of the first spacer element P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side and image-side surfaces of the second spacer element P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side and image-side surfaces of the third spacer element P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side and image-side surfaces of the fourth spacer element P4 abut against the image-side surface S8 of the fourth lens and the object-side surface of the fourth auxiliary spacer element P4b, respectively. The image-side surface of the fourth auxiliary spacer element P4b abuts against the object-side surface S9 of the fifth lens. The object-side and image-side surfaces of the fifth spacer element P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively.

[0074] like Figure 4 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 1-2. In this example, the bearing and contact method of each spacer element is the same as that of Embodiment 1-1, and can be referred to the relevant description in Embodiment 1-1, which will not be repeated here.

[0075] like Figure 5 The diagram shows a schematic representation of the optical imaging lens in Embodiments 1-3. In this example, a fifth auxiliary spacer element P5b is also provided on the image side of the fifth spacer element P5. The object side and image side of the fifth auxiliary spacer element P5b abut against the image side of the fifth spacer element P5 and the object side S11 of the sixth lens, respectively. The abutment and contact methods of the remaining spacer elements are the same as in Embodiments 1-1, and can be referred to the relevant descriptions in Embodiments 1-1, which will not be repeated here.

[0076] In summary, the structural parameters of the optical imaging lens of Embodiment 1 under Embodiments 1-1, 1-2, and 1-3 are shown in Table 2. (Unit: mm)

[0077] Table 2

[0078] Example / Parameters D1s D2s D3s d4s D4s D5s EP01 EP12 EP23 1-1 8.100 8.300 8.500 4.472 8.900 11.100 0.895 2.765 1.754 1-2 8.300 8.500 8.700 4.472 9.100 11.300 0.845 2.765 1.854 1-3 8.000 8.200 8.400 4.472 8.800 10.143 0.745 2.747 1.928 Parameters\Example EP34 CP4 EP45 CP5 L SAG01 OD1 OD2 ∑CP 1-1 1.828 0.022 2.563 0.022 14.000 0.538 7.700 8.100 0.955 1-2 1.729 0.022 2.462 0.022 14.000 0.538 7.900 8.300 0.856 1-3 1.668 0.022 2.088 0.722 14.000 0.538 7.600 8.000 1.677

[0079] In Embodiment 1, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is concave.

[0080] In Example 1, the semi-FOV (half of the maximum field of view) of the optical imaging lens is 68.56°, the total effective focal length f of the optical imaging lens is 3.937mm, the effective focal length f1 of the first lens is -6.913mm, the effective focal length f2 of the second lens is 18.084mm, the effective focal length f3 of the third lens is 3.490mm, the effective focal length f4 of the fourth lens is -3.841mm, the effective focal length f5 of the fifth lens is 3.463mm, and the effective focal length f6 of the sixth lens is -4.967mm.

[0081] Table 3 shows the basic structural parameters of the optical imaging lens in Embodiment 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0082] Table 3

[0083]

[0084] In Embodiment 1, the object-side surface and image-side surface of the first lens E1 to the sixth lens E6 are both aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0085]

[0086] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 3 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 4 below gives the higher-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 S1-S12 in Example 1.

[0087] Table 4

[0088]

[0089]

[0090] Figure 6 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 7 The astigmatism curve of the optical imaging lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0091] according to Figure 6 and Figure 7 As can be seen, the optical imaging lens given in Example 1 can achieve good imaging quality.

[0092] Example 2

[0093] like Figures 8 to 12 As shown, the optical imaging lens of Embodiment 2 is described. Figure 8 A schematic diagram of the optical imaging lens of Embodiment 2-1 is shown. Figure 9 A schematic diagram of the optical imaging lens of Embodiment 2-2 is shown. Figure 10 A schematic diagram of the optical imaging lens of Embodiments 2-3 is shown.

[0094] like Figures 8 to 10 As shown, the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0.

[0095] like Figure 8 The diagram shows a schematic of the optical imaging lens in Embodiment 2-1. In this example, the object-side and image-side surfaces of the first spacer element P1 abut against the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively. The object-side and image-side surfaces of the second spacer element P2 abut against the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively. The object-side and image-side surfaces of the third spacer element P3 abut against the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively. The object-side and image-side surfaces of the fourth spacer element P4 abut against the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively. The object-side and image-side surfaces of the fifth spacer element P5 abut against the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively.

[0096] like Figure 9 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-2. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0097] like Figure 10 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 2-3. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 2-1, and can be referred to the relevant description in Embodiment 2-1, which will not be repeated here.

[0098] In summary, the structural parameters of the optical imaging lens in Embodiment 2 under Embodiments 2-1, 2-2, and 2-3 are shown in Table 5. (Unit: mm)

[0099] Table 5

[0100] Example / Parameters D1s D2s D3s d4s D4s D5s EP01 EP12 EP23 1-1 8.100 8.300 8.500 4.370 10.100 11.100 1.170 2.741 1.660 1-2 8.100 8.700 8.900 4.573 9.700 10.700 1.050 2.743 1.741 1-3 8.700 8.900 9.100 4.955 10.000 11.000 1.234 2.681 1.877 Example / Parameters EP34 CP4 EP45 CP5 L SAG01 OD1 OD2 ∑CP 1-1 2.039 0.022 1.759 0.022 13.500 0.271 7.700 8.100 0.110 1-2 2.044 0.022 1.569 0.022 13.500 0.271 8.100 8.500 0.110 1-3 2.071 0.022 1.802 0.022 13.500 0.271 8.300 8.700 0.110

[0101] In Embodiment 2, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is concave.

[0102] In Example 2, the semi-FOV (half of the maximum field of view) of the optical imaging lens is 64.91°, the total effective focal length f of the optical imaging lens is 4.018 mm, the effective focal length f1 of the first lens is -7.020 mm, the effective focal length f2 of the second lens is 14.493 mm, the effective focal length f3 of the third lens is 3.776 mm, the effective focal length f4 of the fourth lens is -4.191 mm, the effective focal length f5 of the fifth lens is 3.967 mm, and the effective focal length f6 of the sixth lens is -4.740 mm.

[0103] Table 6 shows the basic structural parameters of the optical imaging lens in Embodiment 2, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0104] Table 6

[0105]

[0106] Table 7 below shows the higher-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 S1-S12 in Example 2.

[0107] Table 7

[0108] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.80E-02 6.11E-03 -1.34E-03 2.69E-04 -6.39E-05 1.49E-05 -2.65E-06 S2 -2.60E-02 5.60E-03 6.90E-03 -1.16E-02 1.02E-02 -5.76E-03 2.15E-03 S3 -2.31E-03 8.42E-04 8.95E-04 -9.67E-04 6.01E-04 -2.29E-04 5.23E-05 S4 1.96E-02 -4.40E-02 8.23E-02 -1.05E-01 9.19E-02 -5.58E-02 2.34E-02 S5 2.34E-02 -3.77E-02 5.91E-02 -6.67E-02 5.44E-02 -3.20E-02 1.34E-02 S6 1.69E-03 5.27E-02 -1.01E-01 1.14E-01 -8.52E-02 4.37E-02 -1.54E-02 S7 -4.47E-02 5.92E-02 -9.56E-02 1.05E-01 -8.06E-02 4.32E-02 -1.61E-02 S8 -6.08E-02 2.78E-02 -2.35E-02 1.82E-02 -1.21E-02 6.25E-03 -2.36E-03 S9 4.48E-03 1.88E-03 -1.40E-03 6.67E-04 -2.74E-04 8.83E-05 -2.06E-05 S10 -7.36E-03 3.17E-03 -1.32E-03 4.08E-04 -9.92E-05 2.02E-05 -3.38E-06 S11 -1.64E-02 1.27E-02 -1.26E-02 1.14E-02 -7.94E-03 3.97E-03 -1.42E-03 S12 -4.79E-02 1.18E-02 -1.16E-03 -1.72E-03 1.36E-03 -5.60E-04 1.52E-04 Face number A18 A20 A22 A24 A26 A28 A30 S1 3.20E-07 -2.47E-08 1.10E-09 -2.15E-11 0.00E+00 0.00E+00 0.00E+00 S2 -5.28E-04 8.17E-05 -7.24E-06 2.79E-07 0.00E+00 0.00E+00 0.00E+00 S3 -6.53E-06 3.38E-07 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 -6.60E-03 1.20E-03 -1.26E-04 5.87E-06 0.00E+00 0.00E+00 0.00E+00 S5 -3.91E-03 7.46E-04 -8.35E-05 4.14E-06 0.00E+00 0.00E+00 0.00E+00 S6 3.65E-03 -5.55E-04 4.87E-05 -1.87E-06 0.00E+00 0.00E+00 0.00E+00 S7 4.10E-03 -6.75E-04 6.51E-05 -2.78E-06 0.00E+00 0.00E+00 0.00E+00 S8 6.20E-04 -1.06E-04 1.06E-05 -4.71E-07 0.00E+00 0.00E+00 0.00E+00 S9 3.34E-06 -3.53E-07 2.19E-08 -6.00E-10 0.00E+00 0.00E+00 0.00E+00 S10 4.25E-07 -3.57E-08 1.71E-09 -3.29E-11 0.00E+00 0.00E+00 0.00E+00 S11 3.64E-04 -6.71E-05 8.76E-06 -7.90E-07 4.67E-08 -1.62E-09 2.51E-11 S12 -2.89E-05 3.90E-06 -3.72E-07 2.45E-08 -1.06E-09 2.72E-11 -3.13E-13

[0109] Figure 11 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 12 The astigmatism curve of the optical imaging lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0110] according to Figure 11 and Figure 12 It can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0111] Example 3

[0112] like Figures 13 to 17 As shown, the optical imaging lens of Embodiment 3 is described. Figure 13 A schematic diagram of the optical imaging lens of Embodiment 3-1 is shown. Figure 14 A schematic diagram of the optical imaging lens of Embodiment 3-2 is shown. Figure 15 A schematic diagram of the optical imaging lens of Embodiment 3-3 is shown.

[0113] like Figures 13 to 15 As shown, the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0.

[0114] like Figure 13 The diagram shows a schematic of the optical imaging lens in Embodiment 3-1. In this example, the object-side and image-side of the first spacer element P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer element P2 abut against the image-side S4 of the second lens and the object-side S5 of the third lens, respectively. The object-side and image-side of the third spacer element P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer element P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer element P5 abut against the image-side S10 of the fifth lens and the object-side S11 of the sixth lens, respectively.

[0115] like Figure 14 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 3-2. In this example, the bearing and contact method of each spacer element is the same as that of Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0116] like Figure 15 The diagram shown is a schematic representation of the optical imaging lens in Embodiment 3-3. In this example, a second auxiliary spacer element P2b is also provided on the image side of the second spacer element P2. The object side and image side of the second auxiliary spacer element P2b abut against the image side of the second spacer element P2 and the object side S5 of the third lens, respectively. The abutment and contact methods of the remaining spacer elements are the same as in Embodiment 3-1, and can be referred to the relevant description in Embodiment 3-1, which will not be repeated here.

[0117] In summary, the structural parameters of the optical imaging lens in Embodiment 3 under Embodiments 3-1, 3-2, and 3-3 are shown in Table 8. (Unit: mm)

[0118] Table 8

[0119] Example / Parameters D1s D2s D3s d4s D4s D5s EP01 EP12 EP23 1-1 8.109 8.300 8.500 4.259 9.504 11.100 0.759 2.454 1.893 1-2 8.509 8.700 8.900 4.456 9.904 10.700 0.659 2.476 1.971 1-3 7.809 8.000 8.400 4.686 9.204 10.500 0.809 2.454 1.872 Example / Parameters EP34 CP4 EP45 CP5 L SAG01 OD1 OD2 ∑CP 1-1 1.808 0.022 2.475 0.022 13.700 0.317 7.700 8.110 0.110 1-2 1.858 0.022 2.505 0.022 13.700 0.317 8.100 8.510 0.110 1-3 2.111 0.022 2.408 0.022 13.700 0.317 7.400 7.810 0.909

[0120] In Embodiment 3, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is concave.

[0121] In Example 3, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 54.02°, the total effective focal length f of the optical imaging lens is 4.511 mm, the effective focal length f1 of the first lens is -6.995 mm, the effective focal length f2 of the second lens is 16.267 mm, the effective focal length f3 of the third lens is 3.699 mm, the effective focal length f4 of the fourth lens is -4.131 mm, the effective focal length f5 of the fifth lens is 3.604 mm, and the effective focal length f6 of the sixth lens is -4.215 mm.

[0122] Table 9 shows the basic structural parameters of the optical imaging lens in Embodiment 3, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0123] Table 9

[0124]

[0125] Table 10 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S1-S12 in Example 3.

[0126] Table 10

[0127]

[0128]

[0129] Figure 16 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 17The astigmatism curve of the optical imaging lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0130] according to Figure 16 and Figure 17 It can be seen that the optical imaging lens given in Example 3 can achieve good imaging quality.

[0131] Example 4

[0132] like Figures 18 to 22 As shown, the optical imaging lens of Embodiment 4 is described. Figure 18 A schematic diagram of the optical imaging lens of Embodiment 4-1 is shown. Figure 19 A schematic diagram of the optical imaging lens of Embodiment 4-2 is shown. Figure 20 A schematic diagram of the optical imaging lens of Embodiment 4-3 is shown.

[0133] like Figures 18 to 20 As shown, the optical imaging lens includes a lens barrel P0 and a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a second auxiliary spacer element P2b, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a fifth auxiliary spacer element P5b, and a sixth lens E6 arranged sequentially from the object side to the image side along the optical axis of the lens barrel P0.

[0134] like Figure 18 The diagram shows a schematic of the optical imaging lens in Embodiment 4-1. In this example, the object-side and image-side of the first spacer element P1 abut against the image-side S2 of the first lens and the object-side S3 of the second lens, respectively. The object-side and image-side of the second spacer element P2 abut against the image-side S4 of the second lens and the object-side of the second auxiliary spacer element P2b, respectively. The image-side of the second auxiliary spacer element P2b abuts against the object-side S5 of the third lens. The object-side and image-side of the third spacer element P3 abut against the image-side S6 of the third lens and the object-side S7 of the fourth lens, respectively. The object-side and image-side of the fourth spacer element P4 abut against the image-side S8 of the fourth lens and the object-side S9 of the fifth lens, respectively. The object-side and image-side of the fifth spacer element P5 abut against the image-side S10 of the fifth lens and the object-side of the fifth auxiliary spacer element P5b, respectively. The image-side of the fifth auxiliary spacer element P5b abuts against the object-side S11 of the sixth lens.

[0135] like Figure 19 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 4-2. In this example, the abutment and contact method of each spacer element is the same as in Embodiment 4-1, and can be referred to the relevant description in Embodiment 4-1, which will not be repeated here.

[0136] like Figure 20 The diagram shown is a structural schematic of the optical imaging lens of Embodiment 4-3. In this example, the abutment and contact method of each spacer element is the same as that of Embodiment 4-1, and can be referred to the relevant description in Embodiment 4-1, which will not be repeated here.

[0137] In summary, the structural parameters of the optical imaging lens in Embodiment 4 under Embodiments 4-1, 4-2, and 4-3 are shown in Table 11. (Unit: mm)

[0138] Table 11

[0139] Example / Parameters D1s D2s D3s d4s D4s D5s EP01 EP12 EP23 1-1 9.284 9.219 9.875 4.104 10.305 10.249 1.122 2.233 1.357 1-2 9.084 9.018 9.675 4.104 10.105 10.049 1.022 2.033 1.257 1-3 8.884 8.506 9.475 4.104 9.905 9.484 0.891 2.337 1.500 Example / Parameters EP34 CP4 EP45 CP5 L SAG01 OD1 OD2 ∑CP 1-1 1.708 0.022 1.550 1.103 13.200 0.118 8.900 9.380 2.266 1-2 1.808 0.022 1.447 1.205 13.200 0.118 8.700 9.080 2.569 1-3 1.564 0.022 1.284 1.368 12.900 0.118 8.450 8.890 2.427

[0140] In Embodiment 4, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is concave.

[0141] In Example 4, half of the maximum field of view (Semi-FOV) of the optical imaging lens is 60.01°, the total effective focal length f of the optical imaging lens is 3.822mm, the effective focal length f1 of the first lens is -6.095mm, the effective focal length f2 of the second lens is 6.758mm, the effective focal length f3 of the third lens is 4.495mm, the effective focal length f4 of the fourth lens is -4.354mm, the effective focal length f5 of the fifth lens is 4.968mm, and the effective focal length f6 of the sixth lens is -6.090mm.

[0142] Table 12 shows the basic structural parameters of the optical imaging lens in Embodiment 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0143] Table 12

[0144]

[0145] Table 13 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror S1-S12 in Example 4.

[0146] Table 13

[0147]

[0148] Figure 21 The on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 22 The astigmatism curve of the optical imaging lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0149] according to Figure 21 and Figure 22 It can be seen that the optical imaging lens given in Example 4 can achieve good imaging quality.

[0150] In summary, Examples 1 to 4 satisfy the relationships shown in Table 14.

[0151] Table 14

[0152]

[0153]

[0154] Table 15 shows the effective focal length of each lens of the optical imaging lens in Examples 1 to 4, half of the maximum field of view (Semi-FOV) of the optical imaging lens, and the total effective focal length f of the optical imaging lens.

[0155] Table 15

[0156] Optical parameters / examples Example 1 Example 2 Example 3 Example 4 Semi-FOV (°) 68.56 64.91 54.02 60.01 f(mm) 3.937 4.018 4.511 3.822 f1(mm) -6.913 -7.020 -6.995 -6.095 f2 (mm) 18.084 14.493 16.267 6.758 f3 (mm) 3.490 3.776 3.699 4.495 f4 (mm) -3.841 -4.191 -4.131 -4.354 f5 (mm) 3.463 3.967 3.604 4.968 f6 (mm) -4.967 -4.740 -4.215 -6.090

[0157] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0158] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0159] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0160] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0161] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An optical imaging lens, characterized in that, It includes a lens barrel and a lens assembly and a spacer assembly disposed within the lens barrel. The lens group consists of six lenses, which are arranged in the following order from the object side to the image side: first lens, second lens, third lens, fourth lens, fifth lens, and sixth lens. The spacer element group includes a first spacer element placed on the image side of the first lens and in at least partial contact with the image side of the first lens, a second spacer element placed on the image side of the second lens and in at least partial contact with the image side of the second lens, and a third spacer element placed on the image side of the third lens and in at least partial contact with the image side of the third lens. The air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the center thickness CT2 of the second lens satisfy the following condition: 0.30 < (T12 + T23) / CT2 ≤ 0.80; The maximum field of view (Semi-FOV) of the optical imaging lens and the maximum axial height (L) of the lens barrel satisfy the following condition: 3.90° / mm. <Semi-FOV / L<4.95° / mm; The distance EP01 between the object side of the lens barrel and the object side of the first spacer along the optical axis, the distance EP23 between the second spacer and the third spacer along the optical axis, and the distance EP12 between the first spacer and the second spacer along the optical axis satisfy the following condition: 0.75 < (EP01 + EP23) / EP12 < 1.

17.

2. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fifth spacer element disposed on the image side of the fifth lens and in at least partial contact with the image side surface of the fifth lens. The center thickness CT2 of the second lens, the center thickness CT3 of the third lens, the center thickness CT5 of the fifth lens, and the maximum axial height L of the lens barrel satisfy the following condition: 0.44 < (CT2 + CT3 + CT5) / L < 0.60; The object-side outer diameter D5s of the fifth spacer element and the object-side outer diameter D1s of the first spacer element satisfy the following relationship: 1.05 <D5s / D1s<1.40。 3. The optical imaging lens according to claim 1, characterized in that, The distance EP01 between the object-side surface of the lens barrel and the object-side surface of the first spacer element along the optical axis, and the distance SAG01 between the intersection of the object-side surface of the first lens and the optical axis and the object-side surface of the lens barrel along the optical axis, satisfy the following condition: 1.35 <EP01 / SAG01<9.55。 4. The optical imaging lens according to claim 1, characterized in that, The sum of the air gaps on the optical axis of adjacent lenses from the first lens to the sixth lens, ∑AT, satisfies the following condition with respect to the maximum axial height L of the lens barrel: 0.10 < ∑AT / L < 0.35; The sum of the air gaps ∑AT between adjacent lenses in the first to the sixth lens on the optical axis satisfies the following condition: 1.35 < ∑AT / ∑CP < 21.

65.

5. The optical imaging lens according to claim 1, characterized in that, The sum of the air gaps ∑AT between adjacent lenses in the first to the sixth lens on the optical axis satisfies the following condition: 1.35 < ∑AT / ∑CP < 2.

75.

6. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens, the refractive index N2 of the second lens, and the spacing EP12 between the first spacer element and the second spacer element along the optical axis satisfy the following condition: -3.70≤R4×N2 / EP12<-2.

25.

7. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens and in at least partial contact with the image side surface of the fourth lens. The object-side outer diameter D4s of the fourth spacer element, the effective focal length f4 of the fourth lens, and the radius of curvature R8 of the image-side surface of the fourth lens satisfy the following condition: -5.45mm <D4s / (f4 / R8)<-4.85mm。 8. The optical imaging lens according to claim 7, characterized in that, The effective focal length f4 of the fourth lens, the object-side outer diameter D4s of the fourth spacer element, and the object-side inner diameter d4s of the fourth spacer element satisfy the following: -0.95 <f4 / (D4s-d4s)≤-0.70。 9. The optical imaging lens according to claim 8, characterized in that, The maximum outer diameter OD1 of the first lens and the maximum outer diameter OD2 of the second lens satisfy the following relationship: 18.00 <OD1 / (OD2-OD1)<23.00。 10. The optical imaging lens according to claim 9, characterized in that, The effective focal length f2 of the second lens, the center thickness CT2 of the second lens, and the object-side outer diameter D2s of the second spacer element satisfy the following relationship: 0.28 mm -1 <f2 / CT2 / D2s<0.90mm -1 。 11. The optical imaging lens according to claim 10, characterized in that, The effective focal length f3 of the third lens, the center thickness CT3 of the third lens, and the object-side outer diameter D3s of the third spacer element satisfy the following condition: 0.15 mm -1 <f3 / CT3 / D3s<0.35mm -1 。 12. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens and in at least partial contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in at least partial contact with the image side surface of the fifth lens. The distance EP45 between the fourth spacer element and the fifth spacer element along the optical axis, the maximum thickness CP4 of the fourth spacer element, the maximum thickness CP5 of the fifth spacer element, and the center thickness CT4 of the fourth lens satisfy the following condition: -0.2 < (EP45 - CP4 - CP5) / CT4 < 3.

7.

13. The optical imaging lens according to claim 12, characterized in that, 0.30 < (EP45 - CP4 - CP5) / CT4 < 3.70; and / or, The center thickness CT2 of the second lens, the center thickness CT5 of the fifth lens, the center thickness CT3 of the third lens, and the center thickness CT4 of the fourth lens satisfy the following condition: 1.70 < (CT2 + CT5) / (CT3 + CT4) < 2.40; the spacing distance EP23 between the second spacer element and the third spacer element along the optical axis, the spacing distance EP34 between the third spacer element and the fourth spacer element along the optical axis, and the spacing distance EP45 between the fourth spacer element and the fifth spacer element along the optical axis satisfy the following condition: 1.35 < (EP23 + EP34) / EP45 < 2.45.

Images