Optical imaging system

Abstract

The present invention provides an optical imaging system, comprising: a first lens to a sixth lens, wherein the effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative; a plurality of through-hole elements, where the through-hole element located on the image side of the i-th lens and at least partially contacting the i-th lens is the i-th through-hole element, and i takes 1, 2, 3, 4, 5; a lens barrel, with multiple lenses and a plurality of through-hole elements arranged inside the lens barrel; the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 0 < D0s / D0m < 0.5; the effective focal length f1 of the first lens and the height L of the lens barrel satisfy: -20.0 < f1 / L < -5.0. The present invention solves the problem of low assembly yield of the optical imaging system in the prior art.

Description

Technical Field

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

[0002] With the booming development of the mobile phone camera field, smartphone manufacturers have put forward higher requirements for the optical imaging systems installed on mobile phones. In order to meet the characteristics of a small front-end of the front optical imaging system, the first lens and the front-end size of the lens barrel of the optical imaging system are small. During the assembly process, when the first lens is assembled into the lens barrel with a small front-end, it is easy to cause the lens to deform, resulting in a poor assembly yield of the optical imaging system and affecting the product competitiveness of the optical imaging system. That is to say, how to design the optical parameters of the front lens of the optical imaging system and the size of the lens barrel, and improve the assembly yield of the optical imaging system while ensuring a small front-end is a more difficult problem. Summary of the Invention

[0003] The main object of the present invention is to provide an optical imaging system to solve the problem of low assembly yield of the optical imaging system in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging system, including: multiple lenses, the multiple lenses sequentially include a first lens to a sixth lens from the object side to the image side of the optical imaging system, the effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative; multiple through-hole elements, among the multiple through-hole elements, the through-hole element located on the image side of the i-th lens and at least partially in contact with the i-th lens is the i-th through-hole element, where i takes 1, 2, 3, 4, 5; a lens barrel, the multiple lenses and the multiple through-hole elements are arranged in the lens barrel; the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 0 < D0s / D0m < 0.5; the effective focal length f1 of the first lens and the height L of the lens barrel satisfy: -20.0 < f1 / L < -5.0.

[0005] According to another aspect of the present invention, an optical imaging system is provided, including: multiple lenses. From the object side to the image side of the optical imaging system, the multiple lenses sequentially include a first lens to a sixth lens. The effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative; multiple through-hole elements. Among the multiple through-hole elements, the through-hole element located on the image side of the i-th lens and at least partially in contact with the i-th lens is the i-th through-hole element, where i takes 1, 2, 3, 4, 5; a lens barrel. The multiple lenses and the multiple through-hole elements are arranged inside the lens barrel; the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 0 < D0s / D0m < 0.5; the inner diameter d5m of the image side face of the fifth through-hole element and the effective focal length f6 of the sixth lens satisfy: d5m / |f6| < 3.0. The present application provides an optical imaging system with a small head. On the premise of satisfying the positive and negative combination of the effective focal lengths of the first lens to the sixth lens and 0 < D0s / D0m < 0.5, the overall size of the optical imaging system is relatively small. At the same time, the incident angle of light at the rear lens, especially at the sixth lens, is usually relatively large, and light is likely to enter the structural part of the lens to generate stray light. However, through the limitation of the effective focal length of the sixth lens and the inner diameter size of the fifth through-hole element in the present application, the light intercepted by the fifth through-hole element for the light entering the sixth lens can be controlled, and under the condition of ensuring the illuminance of the optical imaging system, the stray light reaching the position of the sixth lens after passing through the fifth lens can be improved, and the imaging quality can be enhanced.

[0006] Further, the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D1s of the object side face of the first through-hole element, and the inner diameter d1s of the object side face of the first through-hole element satisfy: 0 < d0s / (D1s - d1s) < 2.0.

[0007] Further, the radius of curvature R3 of the object side face of the second lens and the effective focal length f2 of the second lens satisfy: 0 < R3 / f2 < 10.0. The refractive index N1 of the first lens, the refractive index N2 of the second lens, the effective focal length f2 of the second lens, and the axial distance EP12 from the image side face of the first through-hole element to the object side face of the second through-hole element along the optical axis direction of the optical imaging system satisfy: 32.0 < (N1 + N2)*f2 / EP12 < 45.0.

[0008] Further, the inner diameter d5m of the image side face of the fifth through-hole element and the effective focal length f6 of the sixth lens satisfy: d5m / |f6| < 3.0.

[0009] Further, the height L of the lens barrel and the axial distance TD from the object side face of the first lens to the image side face of the sixth lens satisfy: 0 < L / TD < 1.3.

[0010] Furthermore, the sum of the center thicknesses of the first to sixth lenses on the optical axis of the optical imaging system, ∑CT, and the sum of the spacing distances between two adjacent through-hole elements along the optical axis, ∑EP, satisfy the following condition: 1.4 < ∑CT / ∑EP < 2.0.

[0011] Furthermore, half of the maximum field of view (Semi-FOV) of the optical imaging system satisfies: 44.0° <Semi-FOV<50.0°。

[0012] Furthermore, the effective focal length f3 of the third lens, the distance EP23 between the image-side surface of the second through-hole element and the object-side surface of the third through-hole element along the optical axis of the optical imaging system, and the center thickness CT3 of the third lens on the optical axis satisfy the following condition: -15.0 <f3 / (EP23+CT3)<-5.0。

[0013] Furthermore, the distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis of the optical imaging system, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following condition: 0 < 10 * (|EP45 / f4| + |EP45 / f5|) < 2.0.

[0014] Furthermore, the central thickness CT5 of the fifth lens on the optical axis of the optical imaging system, the distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy the following: -20.0 < (CT5 / EP45) / (R10 / R11) < -5.0.

[0015] Furthermore, the following conditions must be met: the height L of the lens barrel, the sum of the distances between two adjacent through-hole elements along the optical axis of the optical imaging system ∑EP, the air gap T56 between the fifth and sixth lenses on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis: 5.0 < (L - ∑EP) / (T56 + CT6) < 6.0.

[0016] Furthermore, the effective focal length f3 of the third lens element and the height L of the lens barrel satisfy the following condition: -2.5 <f3 / L<0。

[0017] Furthermore, the combined focal length of the first, second, and third lenses, f123, the combined focal length of the fourth, fifth, and sixth lenses, f456, and the height L of the lens barrel satisfy the following condition: 2.0 < (f123 + f456) / L < 3.0.

[0018] Furthermore, the following relationship is satisfied among the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first through-hole element: 0 < (DT11 + DT21) / d1s < 1.0.

[0019] Furthermore, the following relationship is satisfied between the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens: DT11 / DT61 < 0.5, and the following relationship is satisfied between the outer diameter D1s of the object side surface of the first through-hole element and the outer diameter D5s of the object side surface of the fifth through-hole element: 0 < D1s / D5s < 0.5.

[0020] Furthermore, the following relationship is satisfied between the axial distance SAGH52 from the intersection point of the image side surface of the fifth lens and the optical axis of the optical imaging system to the vertex of the maximum effective diameter of the image side surface of the fifth lens, and the spacing distance EP50 from the fifth through-hole element to the image side end surface of the lens barrel along the optical axis direction: 0.3 < |SAGH52| / EP50 < 0.6.

[0021] Furthermore, the following relationship is satisfied among the inner diameter d5m of the image side surface of the fifth through-hole element, the perpendicular distance Yc61 from the inflection point on the object side surface of the sixth lens to the optical axis of the optical imaging system, and the perpendicular distance Yc62 from the inflection point on the image side surface of the sixth lens to the optical axis: 1.1 < d5m / Yc61 - d5m / Yc62 < 2.7.

[0022] Applying the technical solution of the present invention, the optical imaging system includes multiple lenses, multiple through-hole elements, and a lens barrel. From the object side to the image side of the optical imaging system, the multiple lenses sequentially include the first lens to the sixth lens. The effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative; among the multiple through-hole elements, the i-th through-hole element is located on the image side of the i-th lens and is at least partially in contact with the i-th lens, where i takes 1, 2, 3, 4, 5; the multiple lenses and the multiple through-hole elements are arranged in the lens barrel; the following relationship is satisfied between the outer diameter D0s of the object side end surface of the lens barrel and the outer diameter D0m of the image side end surface of the lens barrel: 0 < D0s / D0m < 0.5; the following relationship is satisfied between the effective focal length f1 of the first lens and the height L of the lens barrel: -20.0 < f1 / L < -5.0.

[0023] The present application provides an optical imaging system with a small head. On the premise of satisfying the positive and negative combination of the effective focal lengths of the first lens to the sixth lens and 0 < D0s / D0m < 0.5, the head size of the optical imaging system is small, and the front-end lens is prone to deformation during the assembly process, greatly reducing the assembly yield. However, through the control of the effective focal length of the first lens and the barrel height in the present application, while satisfying a smaller head-and-body ratio and a smaller size, the shape of the front-end lens, especially the first lens, is more reasonable, reducing the risk of deformation of the front-end lens and improving the assembly yield of the optical imaging system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 shows a schematic structural diagram of an optical imaging system according to an optional embodiment of the present invention;

[0026] Figure 2 shows a schematic structural diagram of an optical imaging system according to Embodiment 1 of the present invention;

[0027] Figures 3 to 6 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of Embodiment 1 of the present invention;

[0028] Figure 7 shows a schematic structural diagram of an optical imaging system according to Embodiment 2 of the present invention;

[0029] Figure 8 shows a schematic structural diagram of an optical imaging system according to Embodiment 3 of the present invention;

[0030] Figures 9 to 12 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of Embodiment 3 of the present invention;

[0031] Figure 13 shows a schematic structural diagram of an optical imaging system according to Embodiment 4 of the present invention;

[0032] Figure 14 shows a schematic structural diagram of an optical imaging system according to Embodiment 5 of the present invention;

[0033] Figures 15 to 18 respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of Embodiment 5 of the present invention;

[0034] Figure 19 shows a schematic structural diagram of an optical imaging system according to Embodiment 6 of the present invention;

[0035] Figure 20 A schematic diagram of the optical imaging system according to Embodiment 7 of the present invention is shown;

[0036] Figures 21 to 24 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Embodiment 7 of the present invention are shown respectively.

[0037] Figure 25 A schematic diagram of the optical imaging system of Embodiment 8 of the present invention is shown.

[0038] The above figures include the following reference numerals:

[0039] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; P1, First through-hole element; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P2, Second through-hole element; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; P3, Third through-hole element; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; P4, Fourth through-hole element; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; P5, Fifth through-hole element; P5b, Fifth auxiliary through-hole element; P5c, Fifth secondary auxiliary through-hole element; E6, Sixth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens. Detailed Implementation

[0040] 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.

[0041] 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.

[0042] In this invention, 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 intended to limit this invention.

[0043] 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 or third lens.

[0044] In the drawings, for the sake of clarity, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0045] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the convexity and concavity are judged by the positive and negative values of the R value (the R value refers to the radius of curvature of the paraxial region, usually the R value on the lens database in optical software). Taking the object side as an example, when the R value is positive, it is judged as convex, and when the R value is negative, it is judged as concave; taking the image side as an example, when the R value is positive, it is judged as concave, and when the R value is negative, it is judged as convex.

[0046] To solve the problem of low assembly yield rate of optical imaging systems in the prior art, the present invention provides an optical imaging system.

[0047] First Embodiment

[0048] As Figures 1 to 25 shown, the optical imaging system includes multiple lenses, multiple through-hole elements, and a lens barrel. From the object side to the image side of the optical imaging system, the multiple lenses sequentially include a first lens to a sixth lens. The effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative; among the multiple through-hole elements, the i-th through-hole element is located on the image side of the i-th lens and is at least partially in contact with the i-th lens, where i takes 1, 2, 3, 4, 5; the multiple lenses and the multiple through-hole elements are arranged inside the lens barrel; the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel satisfy: 0 < D0s / D0m < 0.5; the effective focal length f1 of the first lens and the height L of the lens barrel satisfy: -20.0 < f1 / L < -5.0.

[0049] The present application provides an optical imaging system with a small head. On the premise of satisfying the positive and negative matching of the effective focal lengths of the first lens to the sixth lens and 0 < D0s / D0m < 0.5, the head size of the optical imaging system is small, and the front-end lens is prone to deformation during the assembly process, greatly reducing the assembly yield. However, through the control of the effective focal length of the first lens and the height of the lens barrel, the present application makes the shape of the front-end lens, especially the first lens, more reasonable while satisfying a smaller head-to-body ratio and a smaller size, reducing the risk of deformation of the front-end lens and improving the assembly yield of the optical imaging system.

[0050] Preferably, the following is satisfied between the outer diameter D0s of the object-side end face of the lens barrel and the outer diameter D0m of the image-side end face of the lens barrel: 0.35 < D0s / D0m < 0.45.

[0051] Preferably, the following is satisfied between the effective focal length f1 of the first lens and the height L of the lens barrel: -18.0 < f1 / L < -5.3.

[0052] It should be noted that when pursuing a small head in the optical imaging system in the prior art, due to the unreasonable design of the shape of the front-end lens, the risk of lens deformation leading to unstable assembly is relatively high, resulting in a low and fluctuating mass production yield. The yield of different combinations is between 10% and 55%. In an optical imaging system in the prior art, when the effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, the effective focal length of the sixth lens is negative, and 0 < D0s / D0m < 0.5 are set, f1 / L satisfies less than or equal to -20.0 or greater than or equal to -5.0, that is, outside the range of -20.0 < f1 / L < -5.0 of the present application. Table 1 below shows the yield of five different lens cavity number combinations of this optical imaging system in the mass production stage.

[0053]

[0054]

[0055] Table 1

[0056] As can be seen from Table 1, the yield under different lens cavity number combinations fluctuates greatly. The highest yield reaches 52%, and the lowest yield is only 15%.

[0057] In an optional implementation manner of the present application, when the optical imaging system satisfies that the effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, the effective focal length of the sixth lens is negative, and 0 < D0s / D0m < 0.5 are set, -20.0 < f1 / L < -5.0 is satisfied. Next

[0058] Table 2 shows the yield rates of five different combinations of lens cavity numbers in the mass production stage of the optical imaging system.

[0059] Matching number Number of tests Number of qualified Yield 1 1791 908 50.70％ 2 475 214 45.05％ 3 1121 593 52.90％ 4 1011 419 41.44％ 5 568 281 49.47％

[0060] Table 2

[0061] It can be seen from Table 2 that the yield rates under different combinations of lens cavity numbers are relatively more stable, fluctuating between 41% and 53%, and the overall yield rate is also relatively high. It can be seen that compared with the optical imaging systems in the prior art, the optical imaging system of the present application makes the shape of the front-end lens, especially the first lens, more reasonable while meeting a smaller head-to-body ratio and smaller size, reduces the risk of deformation of the front-end lens, and improves the assembly stability of the optical imaging system and the yield rate in mass production.

[0062] In this embodiment, the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D1s of the object-side surface of the first through-hole element, and the inner diameter d1s of the object-side surface of the first through-hole element satisfy: 0 < d0s / (D1s - d1s) < 2.0. By limiting d0s / (D1s - d1s) within a reasonable range, it helps to control the appearance of the optical imaging system and the number of light rays that can enter the optical imaging system, ensure the performance requirements of the optical imaging system, and at the same time ensure that the radial size of the head of the optical imaging system is small, meeting the requirements of miniaturization. Preferably, 1.6 < d0s / (D1s - d1s) < 1.8.

[0063] In this embodiment, the radius of curvature R3 of the object-side surface of the second lens and the effective focal length f2 of the second lens satisfy: 0 < R3 / f2 < 10.0, and the refractive index N1 of the first lens, the refractive index N2 of the second lens, the effective focal length f2 of the second lens, and the distance EP12 between the image-side surface of the first through-hole element and the object-side surface of the second through-hole element along the optical axis direction of the optical imaging system satisfy: 32.0 < (N1 + N2)*f2 / EP12 < 45.0. By limiting R3 / f2 and (N1 + N2)*f2 / EP12 within reasonable ranges, the deflection angle of the incident light rays of the system in the second lens can be restricted, the chromatic aberration degree of the system can be reasonably controlled, the ability to correct chromatic aberration can be improved, and at the same time, it can prevent the deflection angles of the light rays in the first and second lenses from being too large, thereby effectively improving the front-end stray light of the optical imaging system and reducing the system sensitivity, while ensuring good imaging quality and improving the system stability. Preferably, 1.2 < R3 / f2 < 8.0, 33.0 < (N1 + N2)*f2 / EP12 < 43.0.

[0064] In this embodiment, the inner diameter d5m of the image side of the fifth through-hole element and the effective focal length f6 of the sixth lens satisfy: d5m / |f6| < 3.0. By limiting d5m / |f6| within a reasonable range, the light interception of the fifth through-hole element on the light entering the sixth lens can be controlled, and under the condition of ensuring the illuminance of the optical imaging system, the stray light reaching the position of the sixth lens after passing through the fifth lens can be improved, and the imaging quality can be enhanced. Preferably, 1.5 < d5m / |f6| < 2.5.

[0065] In this embodiment, the height L of the lens barrel and the on-axis distance TD from the object side of the first lens to the image side of the sixth lens satisfy: 0 < L / TD < 1.3. By limiting L / TD within a reasonable range, the size of the optical imaging system can be minimized as much as possible, ensuring the ultra-thinness of the optical imaging system and saving the space occupied by the optical imaging system. Preferably, 1.55 < L / TD < 1.29.

[0066] In this embodiment, the sum ∑CT of the central thicknesses of the first lens to the sixth lens on the optical axis of the optical imaging system and the sum ∑EP of the spacing distances between adjacent two through-hole elements among the plurality of through-hole elements along the optical axis direction satisfy: 1.4 < ∑CT / ∑EP < 2.0. By limiting ∑CT / ∑EP within a reasonable range, good formability and assembly stability of the lens can be ensured. Preferably, 1.45 < ∑CT / ∑EP < 1.98.

[0067] In this embodiment, half of the maximum field angle Semi-FOV of the optical imaging system satisfies: 44.0° < Semi-FOV < 50.0°. By controlling the maximum field angle of the optical imaging system, the characteristic of a large wide-angle of the system can be achieved. Preferably, 44.2° < Semi-FOV < 49.8°.

[0068] In this embodiment, the effective focal length f3 of the third lens, the spacing distance EP23 from the image side of the second through-hole element to the object side of the third through-hole element along the optical axis direction of the optical imaging system, and the central thickness CT3 of the third lens on the optical axis satisfy: -15.0 < f3 / (EP23 + CT3) < -5.0. By limiting f3 / (EP23 + CT3) within a reasonable range, the reliability of the optical imaging system can be improved and the imaging quality of the optical imaging system can be enhanced while ensuring that the optical parameters meet the design requirements. Preferably, -13.0 < f3 / (EP23 + CT3) < -6.0.

[0069] In this embodiment, the distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis direction of the optical imaging system, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy: 0 < 10 * (|EP45 / f4| + |EP45 / f5|) < 2.0. By limiting 10 * (|EP45 / f4| + |EP45 / f5|) within a reasonable range, the cooperation between the fourth and fifth lenses and other components such as the fourth through-hole element and the lens barrel can be effectively stabilized, so that the product maintains stable performance during mass production. Preferably, 0.2 < 10 * (|EP45 / f4| + |EP45 / f5|) < 1.5.

[0070] In this embodiment, the center thickness CT5 of the fifth lens on the optical axis of the optical imaging system, the distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis direction, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy: -20.0 < (CT5 / EP45) / (R10 / R11) < -5.0. Due to the particularity of the small head wide-angle lens, the light incident angles of the last two lenses are usually large. By limiting (CT5 / EP45) / (R10 / R11) within a reasonable range, the light angles at the positions of the fifth and sixth lenses can be effectively controlled, and the stray light at this position can be reduced. Preferably, -15.0 < (CT5 / EP45) / (R10 / R11) < -6.0.

[0071] In this embodiment, the height L of the lens barrel, the sum ∑EP of the distances between adjacent two through-hole elements among the multiple through-hole elements along the optical axis direction of the optical imaging system, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 5.0 < (L - ∑EP) / (T56 + CT6) < 6.0. By limiting (L - ∑EP) / (T56 + CT6) within a reasonable range, the shape of the sixth lens and its distribution in the whole system can be effectively controlled, avoiding it being too far away from the fifth lens, which helps to improve the processability of the sixth lens processing. Preferably, 5.2 < (L - ∑EP) / (T56 + CT6) < 5.9.

[0072] In this embodiment, the effective focal length f3 of the third lens and the height L of the lens barrel satisfy: -2.5 < f3 / L < 0. By limiting f3 / L within a reasonable range, the forming uniformity of the third lens can be controlled, and it has good processability on the premise of ensuring that the optical parameters of the third lens meet the design requirements. Preferably, -2.3 < f3 / L < -1.5.

[0073] In this embodiment, the combined focal length f123 of the first lens, the second lens and the third lens, the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, and the height L of the lens barrel satisfy: 2.0 < (f123 + f456) / L < 3.0. By restricting (f123 + f456) / L within a reasonable range, the aberration of the front lens group composed of the first lens, the second lens and the third lens and the rear lens group composed of the fourth lens, the fifth lens and the sixth lens can be balanced, and the yield can be improved while ensuring the processability. Preferably, 2.3 < (f123 + f456) / L < 2.9.

[0074] In this embodiment, the maximum effective radius DT11 of the object side surface of the first lens, the maximum effective radius DT21 of the object side surface of the second lens, and the inner diameter d1s of the object side surface of the first through-hole element satisfy: 0 < (DT11 + DT21) / d1s < 1.0. By restricting (DT11 + DT21) / d1s within a reasonable range, the stray light at this position can be effectively reduced, the imaging quality of the lens can be improved, and the yield of the optical imaging system performance can be improved. Preferably, 0.92 < (DT11 + DT21) / d1s < 0.99.

[0075] In this embodiment, the maximum effective radius DT11 of the object side surface of the first lens and the maximum effective radius DT61 of the object side surface of the sixth lens satisfy: DT11 / DT61 < 0.5, and the outer diameter D1s of the object side surface of the first through-hole element and the outer diameter D5s of the object side surface of the fifth through-hole element satisfy: 0 < D1s / D5s < 0.5. By restricting DT11 / DT61 and D1s / D5s within a reasonable range, it is beneficial to make the spatial distribution of the system more reasonable. When assembling, the first and sixth lenses can withstand greater pressure, making the assembly stability of the optical imaging system better. At the same time, it also helps to define the radial dimension ratio of the relatively front position and the relatively rear position of the optical imaging system, and helps to reduce the head size. Preferably, 0.1 < DT11 / DT61 < 0.4, 0.25 < D1s / D5s < 0.48.

[0076] In this embodiment, the axial distance SAGH52 between the intersection point of the image side surface of the fifth lens and the optical axis of the optical imaging system and the vertex of the maximum effective diameter of the image side surface of the fifth lens, and the distance EP50 between the fifth through-hole element and the image-side end surface of the lens barrel along the optical axis direction satisfy: 0.3 < |SAGH52| / EP50 < 0.6. By restricting |SAGH52| / EP50 within a reasonable range, the shape of the fifth lens can be constrained, ensuring its good processability and reducing the risk of ghost images. Preferably, 0.33 < |SAGH52| / EP50 < 0.58.

[0077] In this embodiment, the following relationship is satisfied among the inner diameter d5m of the image side surface of the fifth through-hole element, the perpendicular distance Yc61 from the inflection point on the object side surface of the sixth lens to the optical axis of the optical imaging system, and the perpendicular distance Yc62 from the inflection point on the image side surface of the sixth lens to the optical axis: 1.1 < d5m / Yc61 - d5m / Yc62 < 2.7. By restricting d5m / Yc61 - d5m / Yc62 within a reasonable range, the illuminance inflection and unnecessary stray light caused by the light passing through the non-effective diameter surface of the sixth lens can be effectively avoided, and the imaging quality of the optical imaging system can be improved. Preferably, 1.2 < d5m / Yc61 - d5m / Yc62 < 2.6.

[0078] Second Embodiment

[0079] As Figures 1 to 25 shown, the optical imaging system includes multiple lenses, multiple through-hole elements, and a lens barrel. From the object side to the image side of the optical imaging system, the multiple lenses sequentially include a first lens to a sixth lens. The effective focal length of the first lens is negative, the effective focal length of the second lens is positive, the effective focal length of the third lens is negative, the effective focal length of the fourth lens is negative, the effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative. Among the multiple through-hole elements, the i-th through-hole element is located on the image side of the i-th lens and is at least partially in contact with the i-th lens, where i takes 1, 2, 3, 4, 5. The multiple lenses and the multiple through-hole elements are arranged in the lens barrel. The following relationship is satisfied between the outer diameter D0s of the object-side end surface of the lens barrel and the outer diameter D0m of the image-side end surface of the lens barrel: 0 < D0s / D0m < 0.5. The following relationship is satisfied between the inner diameter d5m of the image side surface of the fifth through-hole element and the effective focal length f6 of the sixth lens: d5m / |f6| < 3.0.

[0080] This application provides an optical imaging system with a small head. On the premise of satisfying the positive and negative combination of the effective focal lengths of the first lens to the sixth lens and 0 < D0s / D0m < 0.5, the overall size of the optical imaging system is relatively small. At the same time, the light incident angle at the rear lens, especially the sixth lens, is usually large, and light is likely to enter the structural part of the lens to generate stray light. However, through the restriction of the effective focal length of the sixth lens and the inner diameter size of the fifth through-hole element in this application, the light intercepted by the fifth through-hole element for the light entering the sixth lens can be controlled, and the stray light reaching the position of the sixth lens after passing through the fifth lens can be improved while ensuring the illuminance of the optical imaging system, thereby improving the imaging quality.

[0081] Preferably, the following relationship is satisfied between the outer diameter D0s of the object-side end surface of the lens barrel and the outer diameter D0m of the image-side end surface of the lens barrel: 0.35 < D0s / D0m < 0.45.

[0082] Preferably, the following relationship is satisfied between the inner diameter d5m of the image side surface of the fifth through-hole element and the effective focal length f6 of the sixth lens: 1.5 < d5m / |f6| < 2.5.

[0083] This implementation may also include other conditional expressions from the first implementation, which will not be elaborated here.

[0084] Optionally, the aforementioned optical imaging system may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The optical imaging system in this application may employ multiple lenses, such as the five lenses described above. By rationally allocating the effective focal length, surface shape, center thickness of each lens, and on-axis distance between lenses, the aperture of the optical imaging system can be effectively increased, the sensitivity of the lens reduced, and the manufacturability of the lens improved. This makes the optical imaging system more conducive to manufacturing and suitable for portable electronic devices such as smartphones.

[0085] However, those skilled in the art will understand that the number of lenses constituting the optical imaging system 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 five lenses are described as an example in the embodiments, the optical imaging system is not limited to including five lenses. If necessary, the optical imaging system may also include other numbers of lenses.

[0086] Figure 1 A schematic diagram of the structure of an optical imaging system of this application is shown. Figure 1 The accompanying drawings also indicate parameters such as d0s, d1s, and D5s to provide a clear and intuitive understanding of their meaning. To facilitate the demonstration of the optical imaging system structure and specific surface features, these parameters will not be shown in the accompanying drawings when describing specific embodiments.

[0087] Where Dis refers to the outer diameter of the object side of the i-th through-hole element, dis refers to the inner diameter of the object side of the i-th through-hole element, Dim refers to the outer diameter of the image side of the i-th through-hole element, dim refers to the inner diameter of the image side of the i-th through-hole element, CPi refers to the maximum thickness of the i-th through-hole element, which is also the maximum distance along the optical axis from the object side to the image side of the i-th through-hole element, and EPij refers to the distance along the optical axis between the image side of the i-th through-hole element and the object side of the j-th through-hole element, where i and j are both positive integers greater than or equal to 1. d0s is the inner diameter of the object side end face of the lens barrel, and D0m is the outer diameter of the image side end face of the lens barrel. The maximum height L of the lens barrel P0 refers to the maximum distance along the optical axis from the object side end face to the image side end face of the lens barrel P0.

[0088] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters applicable to the optical imaging systems described above.

[0089] It should be noted that any one of the following embodiments, from Embodiment 1 to Embodiment 8, is applicable to all implementation methods of this application.

[0090] Example 1

[0091] like Figures 2 to 6 The optical imaging system of Embodiment 1 of this application is described in the figure.

[0092] like Figure 2 As shown, the optical imaging system includes, from the object side to the image side, a first lens E1, a first through-hole element P1, a second lens E2, a second through-hole element P2, a third lens E3, a third through-hole element P3, a fourth lens E4, a fourth through-hole element P4, a fifth lens E5, a fifth through-hole element P5, a fifth auxiliary through-hole element P5b, a fifth secondary auxiliary through-hole element P5c, and a sixth lens E6.

[0093] like Figure 2 As shown, the object side of the first lens is S1, the image side of the first lens is S2, the object side of the second lens is S3, the image side of the second lens is S4, the object side of the third lens is S5, the image side of the third lens is S6, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the object side of the sixth lens is S11, and the image side of the sixth lens is S12.

[0094] Table 3 shows the basic structural parameters of the optical imaging system in Embodiment 1, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0095] Face number Surface type radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless 400.0000 STO spherical endless 0.0222 S1 aspherical -30.6742 0.2648 1.64 23.52 0.0000 S2 aspherical 25.5731 0.0329 0.0000 S3 aspherical 3.6355 0.5029 1.55 55.92 0.5673 S4 aspherical -2.2107 0.0688 0.1347 S5 aspherical 3.2260 0.2360 1.68 19.24 -1.7727 S6 aspherical 1.8917 0.2944 0.0282 S7 aspherical 3.8945 0.2657 1.64 23.52 0.0835 S8 aspherical 1.8084 0.2036 0.0000 S9 aspherical -13.9487 0.8030 1.55 55.92 -1.7688 S10 aspherical -0.6297 0.0478 -0.9964 S11 aspherical 3.0373 0.4092 1.54 55.71 -1.3387 S12 aspherical 0.5828 0.6067 -4.3562 S13 spherical endless 0.1100 1.52 64.20 S14 spherical endless 0.5445 S15 spherical endless

[0096] Table 3

[0097] Table 3 also shows the object side surface S13, the image side surface S14, and the imaging surface S15 of the filter.

[0098] In this embodiment, the object-side and image-side surfaces of the first to sixth lenses are aspherical, and the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0099]

[0100] 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, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 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, A30 that can be used for each aspherical mirror in this embodiment.

[0101] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.0616E-02 4.4980E-04 3.0457E-05 4.0542E-06 -4.2228E-06 -1.5726E-07 -2.4295E-06 S2 -2.1495E-02 3.0668E-03 -1.4670E-05 1.7488E-05 -1.9400E-05 1.2167E-05 -4.2731E-06 S3 -4.2134E-02 2.7810E-03 -9.9032E-05 9.6113E-07 1.3779E-05 2.5466E-05 2.4270E-06 S4 -8.6173E-02 -5.7536E-03 1.0050E-03 -9.6045E-04 3.4633E-04 -1.9812E-05 9.0262E-05 S5 -1.2530E-01 2.0977E-03 4.5747E-03 -2.1959E-03 8.1606E-04 -2.2853E-04 8.5358E-05 S6 -1.3055E-01 5.0192E-05 2.5274E-03 -1.9500E-03 2.8506E-04 -1.7374E-04 -2.4533E-05 S7 -2.6077E-01 6.4036E-02 -5.4705E-03 1.4570E-03 -1.9749E-03 3.9871E-04 -1.8026E-04 S8 -5.5851E-01 7.7419E-02 -1.1643E-02 6.6691E-03 -3.7432E-03 8.8910E-04 -6.5438E-04 S9 -1.3589E-01 5.5005E-02 -1.0039E-02 -2.0180E-03 -4.4509E-03 4.4916E-04 -2.8407E-04 S10 8.5729E-01 -3.0249E-02 4.9587E-02 -3.2108E-02 3.5562E-03 -1.9956E-03 3.6464E-03 S11 -1.1156E+00 1.8688E-01 2.2500E-03 -5.1275E-03 2.7199E-03 -6.3640E-03 3.5641E-03 S12 -1.3287E+00 1.4515E-01 -4.5994E-02 1.1670E-02 -2.2051E-03 -2.8560E-03 1.1729E-03 Face number A18 A20 A22 A22 A26 A28 A30 S1 -9.2815E-08 -1.1960E-07 1.5875E-06 -5.3808E-07 0.0000E+00 0.0000E+00 0.0000E+00 S2 3.5380E-06 -1.5167E-06 1.1649E-06 -1.9353E-06 -7.2788E-07 -7.1466E-07 7.3056E-07 S3 -2.0438E-06 -4.4866E-06 -5.6611E-06 -4.3974E-06 -5.1674E-06 -3.6369E-06 -2.6332E-06 S4 1.1366E-05 1.2280E-05 5.0700E-06 -1.3687E-06 1.6343E-06 3.2092E-07 1.2348E-06 S5 -4.1498E-05 2.4502E-05 4.5450E-06 4.8590E-06 2.4872E-06 -1.7939E-07 0.0000E+00 S6 2.2903E-05 -3.2059E-05 9.4804E-06 -1.0115E-05 6.7323E-06 -2.8262E-06 0.0000E+00 S7 2.3853E-04 1.7676E-05 -4.3353E-05 -5.7455E-06 -2.3541E-05 1.1836E-06 1.3185E-06 S8 -1.4182E-05 1.4750E-04 8.8589E-05 6.8663E-05 2.4297E-05 -7.3362E-06 9.3058E-07 S9 -8.3789E-04 -1.0774E-04 1.1015E-04 -1.4858E-04 3.5407E-05 -2.9105E-05 2.5848E-07 S10 -1.4089E-03 -3.1319E-04 1.1029E-04 2.0159E-04 -1.7019E-04 -4.5280E-05 -2.0270E-05 S11 -1.6762E-03 1.9224E-03 -1.6900E-03 8.9385E-04 -2.2196E-04 6.3803E-05 1.2055E-04 S12 -1.1280E-03 1.0575E-03 -1.1973E-03 9.2785E-04 -7.2801E-04 2.0889E-04 -2.2903E-04

[0102] Table 4

[0103] Figure 3 The on-axis chromatic aberration curve of the optical imaging system of Embodiment 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging system. Figure 4 The astigmatism curves of the optical imaging system of Embodiment 1 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 5 The distortion curves of the optical imaging system of Embodiment 1 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 6 The magnification chromatic aberration curve of the optical imaging system of Embodiment 1 is shown, which represents the deviation of light at different image heights on the imaging surface after passing through the optical imaging system.

[0104] according to Figures 3 to 6 As can be seen, the optical imaging system given in Example 1 can achieve good imaging quality.

[0105] Example 2

[0106] The difference from Embodiment 1 is that the parameters of the lens barrel P0 and the through-hole element are different.

[0107] like Figure 7 The image shows an optical imaging system according to Embodiment 2 of this application. For the sake of brevity, descriptions similar to those in Embodiment 1 are omitted.

[0108] In Embodiment 2, the curvature radius, center thickness, and other parameters of the first to sixth lenses, as well as the spacing between the lenses and the higher-order image coefficients, are the same as in Embodiment 1, as shown in Tables 3 and 4. However, at least some parameters, such as the lens barrel P0, the thickness of the through-hole element, the inner diameter and outer diameter of the through-hole element, and the distance between the through-hole elements, are different. Therefore, the imaging quality of the optical imaging system in this embodiment is as follows: Figures 3 to 6 As shown.

[0109] Example 3

[0110] The difference from Embodiment 1 is that the parameters of the lens barrel P0, the support component, and the lens are different.

[0111] like Figures 8 to 12 The optical imaging system of Embodiment 3 of this application is described in the figure.

[0112] like Figure 8As shown, the optical imaging system includes, from the object side to the image side, a first lens E1, a first through-hole element P1, a second lens E2, a second through-hole element P2, a third lens E3, a third through-hole element P3, a fourth lens E4, a fourth through-hole element P4, a fifth lens E5, a fifth through-hole element P5, a fifth auxiliary through-hole element P5b, a fifth secondary auxiliary through-hole element P5c, and a sixth lens E6.

[0113] like Figure 8 As shown, the object side of the first lens is S1, the image side of the first lens is S2, the object side of the second lens is S3, the image side of the second lens is S4, the object side of the third lens is S5, the image side of the third lens is S6, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the object side of the sixth lens is S11, and the image side of the sixth lens is S12.

[0114] Table 5 shows the basic structural parameters of the optical imaging system of Embodiment 3, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0115] Face number Surface type radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless 400.0000 STO spherical endless 0.0222 S1 aspherical -66.8621 0.2672 1.64 23.52 0.0000 S2 aspherical 78.0075 0.0327 0.0000 S3 aspherical 3.9158 0.4984 1.55 55.92 1.2194 S4 aspherical -2.2946 0.1127 0.1634 S5 aspherical 3.3038 0.2300 1.68 19.24 -1.7466 S6 aspherical 1.9288 0.3114 0.0438 S7 aspherical 3.8302 0.2728 1.64 23.52 0.1641 S8 aspherical 1.8393 0.2133 0.0000 S9 aspherical -15.4796 0.8144 1.55 55.92 -9.1900 S10 aspherical -0.6440 0.0403 -1.0036 S11 aspherical 2.9035 0.3992 1.54 55.71 -1.7742 S12 aspherical 0.5797 0.5759 -4.2669 S13 spherical endless 0.1100 1.52 64.20 S14 spherical endless 0.5138 S15 spherical endless

[0116] Table 5

[0117] Table 5 also shows the object side surface S13, the image side surface S14, and the imaging surface S15 of the filter.

[0118] In this embodiment, the object side and image side of the first to sixth lenses are both aspherical, and the surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Embodiment 1.

[0119] Table 6 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 in this embodiment.

[0120] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.1039E-02 3.8554E-04 4.0532E-05 5.8295E-06 -3.0071E-06 1.5097E-06 -2.1639E-06 S2 -2.1479E-02 2.9097E-03 9.8973E-05 7.9442E-07 -1.1190E-06 -1.9014E-08 8.8354E-07 S3 -4.1857E-02 2.9785E-03 6.9960E-05 -4.0516E-06 8.4785E-06 8.6961E-07 -1.0685E-05 S4 -8.6117E-02 -5.6234E-03 7.3328E-04 -4.1345E-04 2.3872E-04 6.9885E-05 3.3716E-05 S5 -1.2415E-01 1.2859E-03 3.7773E-03 -1.3611E-03 5.4957E-04 -7.3189E-05 -3.4962E-05 S6 -1.3054E-01 3.3361E-04 1.8718E-03 -1.6410E-03 2.6324E-04 -1.1450E-04 -4.0205E-05 S7 -2.5946E-01 6.3557E-02 -5.3730E-03 1.4164E-03 -1.8215E-03 5.0662E-04 -2.3289E-04 S8 -5.5098E-01 7.6010E-02 -1.0614E-02 6.2144E-03 -3.6206E-03 9.6334E-04 -7.8716E-04 S9 -1.3832E-01 5.4924E-02 -1.0230E-02 -1.7672E-03 -4.1319E-03 4.1294E-04 -5.8271E-04 S10 8.6869E-01 -3.0316E-02 4.6797E-02 -2.9074E-02 3.9902E-03 -2.7045E-03 2.3916E-03 S11 -1.1420E+00 1.9396E-01 2.2365E-03 -3.9278E-03 8.7095E-05 -5.5712E-03 4.7088E-03 S12 -1.1910E+00 1.7013E-01 -4.8048E-02 1.0643E-02 -2.2902E-03 -2.1416E-03 1.3596E-03 Face number A18 A20 A22 A22 A26 A28 A30 S1 -5.3378E-07 -9.2561E-07 1.0795E-06 -2.6297E-08 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.3727E-06 -1.2712E-07 -8.0930E-07 -7.6116E-07 -7.1933E-07 4.0050E-07 5.3440E-07 S3 -1.5610E-05 -1.7708E-05 -1.3368E-05 -9.1037E-06 -6.3132E-06 -3.4875E-06 -1.2445E-06 S4 -6.6927E-06 -2.0665E-05 -1.8463E-05 -1.3071E-05 -6.3844E-06 -3.6532E-06 -1.7683E-06 S5 -2.8616E-05 7.4283E-06 2.4719E-05 2.4534E-05 1.6457E-05 5.3447E-06 0.0000E+00 S6 2.0794E-05 -3.9389E-05 -1.1700E-05 -1.2067E-05 1.3448E-06 -1.4064E-06 0.0000E+00 S7 3.2214E-04 7.8013E-05 6.6716E-05 -2.1949E-05 1.0673E-05 -3.4214E-06 9.6192E-06 S8 4.9622E-05 8.3382E-06 2.4927E-04 3.2850E-05 3.3022E-05 -1.9076E-05 -2.9415E-06 S9 -5.5528E-04 -2.6812E-04 2.4513E-04 -5.1470E-05 -2.1573E-05 -5.6116E-06 1.7887E-06 S10 -9.5265E-04 -2.3463E-04 1.0475E-06 1.9111E-04 -1.5374E-04 -1.0941E-04 -5.2711E-05 S11 -1.8146E-03 1.4997E-03 -1.8651E-03 1.9923E-04 3.4512E-04 2.5066E-04 2.6797E-04 S12 -1.8944E-03 1.9670E-03 -1.2973E-03 1.1597E-03 -5.7156E-04 4.0970E-04 -1.4752E-04

[0121] Table 6

[0122] Figure 9 The on-axis chromatic aberration curve of the optical imaging system of Embodiment 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical imaging system. Figure 10 The astigmatism curves of the optical imaging system of Embodiment 3 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 11 The distortion curves of the optical imaging system of Embodiment 3 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 12The magnification chromatic aberration curve of the optical imaging system of Embodiment 3 is shown, which represents the deviation of light at different image heights on the imaging surface after passing through the optical imaging system.

[0123] according to Figures 9 to 12 As can be seen, the optical imaging system given in Example 3 can achieve good imaging quality.

[0124] Example 4

[0125] The difference from Embodiment 3 is that the parameters of the lens barrel P0 and the through-hole element are different.

[0126] like Figure 13 The image shows an optical imaging system according to Embodiment 4 of this application. For the sake of brevity, descriptions similar to those in Embodiment 3 will be omitted.

[0127] In Embodiment 4 and Embodiment 3, the parameters such as the radius of curvature, center thickness, and spacing between the first to sixth lenses of the optical imaging system are the same, as shown in Tables 5 and 6. However, at least some parameters such as the lens barrel P0, the thickness of the through-hole element, the inner diameter and outer diameter of the through-hole element, and the distance between the through-hole elements are different. Therefore, the imaging quality of the optical imaging system in this embodiment is as follows: Figures 9 to 12 As shown.

[0128] Example 5

[0129] The difference from Embodiment 1 is that the parameters of the lens barrel P0, the support component, and the lens are different.

[0130] like Figures 14 to 18 The optical imaging system of Embodiment 5 of this application is described in the figure.

[0131] like Figure 14 As shown, the optical imaging system includes, in sequence from the object side to the image side, a first lens E1, a first through-hole element P1, a second lens E2, a second through-hole element P2, a third lens E3, a third through-hole element P3, a fourth lens E4, a fourth through-hole element P4, a fifth lens E5, a fifth through-hole element P5, and a sixth lens E6.

[0132] like Figure 14 As shown, the object side of the first lens is S1, the image side of the first lens is S2, the object side of the second lens is S3, the image side of the second lens is S4, the object side of the third lens is S5, the image side of the third lens is S6, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the object side of the sixth lens is S11, and the image side of the sixth lens is S12.

[0133] Table 7 shows the basic structural parameters of the optical imaging system in Embodiment 5, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0134] Face number Surface type radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless 400.0000 STO spherical endless 0.0222 S1 aspherical -72.4666 0.2605 1.64 23.52 0.0000 S2 aspherical 42.3556 0.0581 0.0000 S3 aspherical 3.5400 0.4874 1.55 55.92 2.9500 S4 aspherical -2.3710 0.1582 -0.0590 S5 aspherical 3.2248 0.2300 1.68 19.24 -1.5486 S6 aspherical 1.8873 0.3186 0.0466 S7 aspherical 3.6514 0.2584 1.64 23.52 0.1010 S8 aspherical 1.7872 0.2181 0.0000 S9 aspherical 26.3344 0.8138 1.55 55.92 0.0000 S10 aspherical -0.6709 0.0300 -1.0063 S11 aspherical 3.0689 0.4025 1.54 55.71 -2.7342 S12 aspherical 0.5757 0.5381 -4.3026 S13 spherical endless 0.1100 1.52 64.20 S14 spherical endless 0.4764 S15 spherical endless

[0135] Table 7

[0136] Table 7 also shows the object side surface S13, the image side surface S14, and the imaging surface S15 of the filter.

[0137] In this embodiment, the object side and image side of the first to sixth lenses are both aspherical, and the surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Embodiment 1.

[0138] Table 8 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 in this embodiment.

[0139] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.1616E-02 4.9052E-04 3.5150E-05 4.8190E-06 -2.3036E-06 1.6922E-06 -1.4237E-06 S2 -2.1348E-02 3.1974E-03 7.3480E-05 -9.2848E-06 5.4460E-07 1.0374E-06 3.2711E-06 S3 -3.7064E-02 2.2794E-03 -7.1423E-05 -4.6953E-05 -5.7688E-06 3.6669E-06 2.3978E-06 S4 -7.0098E-02 -3.8431E-03 -1.5478E-05 -4.1454E-04 3.6330E-05 8.6201E-06 2.0359E-05 S5 -9.7725E-02 -8.8304E-04 1.6995E-03 -8.5518E-04 2.7344E-04 4.7656E-05 2.8753E-05 S6 -1.0011E-01 -3.4399E-04 1.4538E-03 -9.9733E-04 2.2687E-04 1.0462E-05 -1.1932E-05 S7 -2.4256E-01 5.2511E-02 -4.3405E-03 1.6557E-03 -1.6757E-03 3.6721E-04 -3.0916E-04 S8 -5.3898E-01 7.0371E-02 -1.0742E-02 6.1671E-03 -3.0650E-03 1.1364E-03 -6.8495E-04 S9 -1.4077E-01 5.2221E-02 -6.5055E-03 5.9994E-04 -2.7140E-03 1.2098E-03 -1.3094E-04 S10 7.6049E-01 -3.6758E-02 4.5438E-02 -2.1562E-02 3.7079E-03 -2.4437E-03 1.8075E-03 S11 -9.6523E-01 1.3722E-01 7.2101E-03 3.1430E-03 5.0980E-03 -7.0167E-03 9.6800E-04 S12 -1.1646E+00 1.5118E-01 -4.9906E-02 9.3387E-03 8.5652E-04 -2.4182E-03 2.5956E-03 Face number A18 A20 A22 A22 A26 A28 A30 S1 -3.4927E-07 -8.7225E-07 7.2445E-07 -2.5105E-08 0.0000E+00 0.0000E+00 0.0000E+00 S2 8.4915E-07 3.7212E-07 -7.6565E-07 -8.5895E-08 -3.1339E-07 2.0531E-07 -1.5678E-07 S3 1.7987E-06 2.5220E-08 -7.2027E-08 -1.1036E-07 1.9376E-07 -4.7718E-08 -2.8072E-08 S4 7.2710E-06 4.4454E-06 2.4998E-07 4.1781E-07 -6.7726E-07 -1.5742E-08 -4.3695E-07 S5 6.9062E-06 -9.4360E-07 -9.0155E-09 -9.0247E-07 4.1598E-07 -1.3976E-07 0.0000E+00 S6 1.8353E-05 -7.8171E-06 3.8564E-06 -4.0471E-07 1.8712E-06 5.2492E-07 0.0000E+00 S7 1.0700E-04 -3.8768E-05 3.6641E-05 -3.0899E-05 9.0652E-06 -5.9586E-06 3.2590E-06 S8 7.9793E-05 -2.1977E-04 1.3729E-04 -3.3573E-05 2.5692E-05 -1.2242E-05 3.9192E-07 S9 1.4279E-04 -3.3101E-04 1.5022E-04 -9.8357E-06 -8.9015E-06 7.4886E-09 1.1567E-06 S10 -9.2184E-05 -1.9438E-04 -2.1167E-04 1.2730E-04 2.1397E-05 1.0398E-05 -1.3569E-05 S11 -2.7277E-03 6.5065E-04 5.8333E-05 -4.3453E-04 -9.6867E-05 -3.3250E-04 -8.2074E-05 S12 -3.0842E-03 2.1501E-03 -1.5981E-03 1.2833E-03 -7.2724E-04 3.5891E-04 -1.3656E-04

[0140] Table 8

[0141] Figure 15 The on-axis chromatic aberration curve of the optical imaging system of Embodiment 5 is shown, which represents the deflection of the focal point after light of different wavelengths passes through the optical imaging system. Figure 16 The astigmatism curves of the optical imaging system of Embodiment 5 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 17 The distortion curves of the optical imaging system of Embodiment 5 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 18 The magnification chromatic aberration curve of the optical imaging system of Embodiment 5 is shown, which represents the deviation of light at different image heights on the imaging surface after passing through the optical imaging system.

[0142] according to Figures 15 to 18 As can be seen, the optical imaging system given in Example 5 can achieve good imaging quality.

[0143] Example 6

[0144] The difference from Embodiment 5 is that the parameters of the lens barrel P0 and the through-hole element are different.

[0145] like Figure 19 The image shows an optical imaging system according to Embodiment Six of this application. For the sake of brevity, descriptions similar to those in Embodiment Five are omitted.

[0146] In Embodiment Six and Embodiment Five, the parameters such as the radius of curvature, center thickness, and spacing between the first to sixth lenses of the optical imaging system are the same, as shown in Tables 7 and 8. However, at least some parameters, such as the lens barrel P0, the thickness of the through-hole element, the inner diameter and outer diameter of the through-hole element, and the distance between the through-hole elements, are different. Therefore, the imaging quality of the optical imaging system in this embodiment is as follows: Figures 15 to 18 As shown.

[0147] Example 7

[0148] The difference from Embodiment 1 is that the parameters of the lens barrel P0, the support component, and the lens are different.

[0149] like Figures 20 to 24 The image shows an optical imaging system according to Embodiment Seven of this application.

[0150] like Figure 20 As shown, the optical imaging system includes, from the object side to the image side, a first lens E1, a first through-hole element P1, a second lens E2, a second through-hole element P2, a third lens E3, a third through-hole element P3, a fourth lens E4, a fourth through-hole element P4, a fifth lens E5, a fifth through-hole element P5, a fifth auxiliary through-hole element P5b, a fifth secondary auxiliary through-hole element P5c, and a sixth lens E6.

[0151] like Figure 20 As shown, the object side of the first lens is S1, the image side of the first lens is S2, the object side of the second lens is S3, the image side of the second lens is S4, the object side of the third lens is S5, the image side of the third lens is S6, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the object side of the sixth lens is S11, and the image side of the sixth lens is S12.

[0152] Table 9 shows the basic structural parameters of the optical imaging system of Embodiment 7, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0153] Face number Surface type radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless 400.0000 STO spherical endless 0.0222 S1 aspherical 163.3547 0.2312 1.64 23.52 0.0000 S2 aspherical 32.0072 0.0481 0.0000 S3 aspherical 16.4177 0.4896 1.55 56.14 0.0000 S4 aspherical -1.6254 0.0843 0.0545 S5 aspherical 3.3033 0.2917 1.68 19.24 -0.8626 S6 aspherical 2.0224 0.3796 -0.2640 S7 aspherical -110.5073 0.2408 1.64 23.52 0.0000 S8 aspherical 2.4469 0.1736 0.1015 S9 aspherical 92.0615 0.8050 1.55 56.14 0.0000 S10 aspherical -0.6744 0.0310 -1.0042 S11 aspherical 2.3848 0.4085 1.54 55.71 -5.5479 S12 aspherical 0.6042 0.6594 -3.9344 S13 spherical endless 0.1100 1.52 64.20 S14 spherical endless 0.5920 S15 spherical endless

[0154] Table 9

[0155] Table 9 also shows the object side surface S13, the image side surface S14, and the imaging surface S15 of the filter.

[0156] In this embodiment, the object side and image side of the first to sixth lenses are both aspherical, and the surface shape of each aspherical lens can be defined by, but is not limited to, the formula (1) in Embodiment 1.

[0157] Table 10 lists 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 in this embodiment.

[0158] Face number A4 A6 A8 A10 A12 A14 A16 S1 -1.3754E-02 5.1942E-04 6.9803E-05 9.8654E-06 -3.3753E-06 1.5473E-06 -2.6138E-06 S2 -1.9543E-02 3.0588E-03 7.9947E-04 1.0181E-04 3.6484E-05 1.0336E-05 4.7945E-06 S3 -3.3910E-02 9.4116E-04 1.1355E-03 1.9712E-04 8.6054E-05 2.4512E-05 1.3102E-05 S4 -6.9724E-02 -7.0805E-03 4.4875E-04 -3.3602E-04 2.6323E-04 5.5901E-05 7.8544E-05 S5 -1.0289E-01 -7.5633E-04 2.6814E-03 -9.0285E-04 4.1532E-04 -6.8316E-05 5.3333E-05 S6 -1.1546E-01 -5.7509E-04 2.3948E-03 -9.9030E-04 2.1244E-04 -1.1630E-04 -9.8690E-06 S7 -2.2038E-01 4.5133E-02 -2.9971E-03 1.8140E-03 -1.0298E-03 3.6901E-04 -3.0928E-04 S8 -5.1497E-01 6.3263E-02 -1.1654E-02 5.7692E-03 -2.4219E-03 1.5485E-03 -4.5339E-04 S9 -1.4036E-01 5.5220E-02 -6.2450E-03 3.9587E-04 -2.7534E-03 1.5646E-03 -2.1894E-04 S10 7.7590E-01 -4.0473E-02 4.7626E-02 -2.2865E-02 3.6836E-03 -2.6028E-03 1.9834E-03 S11 -7.0952E-01 1.1434E-01 5.0210E-03 -1.6319E-02 1.2390E-02 -7.9879E-03 5.7037E-03 S12 -8.0188E-01 1.5053E-01 -3.2929E-02 2.8184E-03 2.8462E-03 -3.3142E-03 2.2117E-03 Face number A18 A20 A22 A22 A26 A28 A30 S1 5.1983E-07 -1.3556E-06 1.5724E-06 -2.1868E-07 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.6385E-06 -5.8952E-08 -2.7504E-06 -3.1979E-06 -2.5326E-06 -1.0546E-06 7.6288E-08 S3 5.6990E-06 1.8171E-06 -1.3836E-06 -1.6866E-06 -1.2785E-06 -5.7036E-07 -2.5351E-07 S4 2.9853E-05 1.7853E-05 7.6845E-08 -1.2012E-06 -4.7772E-06 -1.6018E-06 -1.8225E-06 S5 -9.4185E-06 -6.6373E-07 -4.4867E-06 2.9252E-06 9.4733E-07 1.0837E-06 0.0000E+00 S6 1.0506E-05 -1.6198E-05 -1.2114E-06 2.3026E-06 2.7292E-06 -3.5339E-07 0.0000E+00 S7 6.3389E-05 2.6407E-05 4.5623E-05 -5.0063E-05 1.0943E-06 -7.5677E-06 1.1248E-05 S8 7.2666E-05 -1.3387E-04 2.2479E-04 -3.9334E-05 2.6516E-05 -3.5895E-05 4.1244E-06 S9 5.9411E-05 -3.5145E-04 2.6269E-04 -6.8087E-05 1.9324E-05 -1.7666E-05 7.0280E-06 S10 -2.5750E-04 -8.5482E-05 -2.1180E-04 1.3174E-04 2.0903E-05 2.0249E-05 -2.7246E-05 S11 -3.2094E-03 2.2817E-03 -1.6665E-03 3.1106E-04 -3.9046E-04 2.0612E-05 -2.2981E-05 S12 -2.0035E-03 1.5368E-03 -1.0775E-03 6.4901E-04 -3.8659E-04 2.0415E-04 -7.4086E-05

[0159] Table 10

[0160] Figure 21 The on-axis chromatic aberration curve of the optical imaging system of Embodiment 7 is shown, which represents the deflection of the focal point after light of different wavelengths passes through the optical imaging system. Figure 22 The astigmatism curves of the optical imaging system of Embodiment 7 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 23 The distortion curves of the optical imaging system of Embodiment 7 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 24 The magnification chromatic aberration curve of the optical imaging system of Embodiment 7 is shown, which represents the deviation of light at different image heights on the imaging surface after passing through the optical imaging system.

[0161] according to Figures 21 to 24 It can be seen that the optical imaging system given in Example 7 can achieve good imaging quality.

[0162] Example 8

[0163] The difference from Embodiment 7 is that the parameters of the lens barrel P0 and the through-hole element are different.

[0164] like Figure 25 The image shows an optical imaging system according to Embodiment 8 of this application. For the sake of brevity, descriptions similar to those in Embodiment 7 will be omitted.

[0165] In Embodiment 8 and Embodiment 7, the parameters such as the radius of curvature, center thickness, and spacing between the first to sixth lenses of the optical imaging system are the same, as shown in Tables 9 and 10. However, at least some parameters such as the lens barrel P0, the thickness of the through-hole element, the inner diameter and outer diameter of the through-hole element, and the distance between the through-hole elements are different. Therefore, the imaging quality of the optical imaging system in this embodiment is as follows: Figures 21 to 24 As shown.

[0166] In summary, Examples 1 to 8 satisfy the relationships shown in Table 11.

[0167] Conditional / Example 1 2 3 4 5 6 7 8 D0s / D0m 0.37 0.36 0.37 0.37 0.36 0.38 0.39 0.39 f1 / L -5.53 -5.56 -14.29 -14.29 -10.61 -10.61 -15.23 -15.23 d0s / (D1s-d1s) 1.77 1.74 1.74 1.74 1.79 1.72 1.72 1.72 R3 / f2 1.40 1.40 1.44 1.44 1.32 1.32 6.00 6.00 (N1+N2)*f2 / EP12 35.58 35.57 40.71 40.71 38.34 38.34 35.93 35.93 d5m / |f6| 1.98 1.98 1.91 1.91 2.16 2.16 1.68 1.68 L / TD 1.25 1.24 1.22 1.22 1.21 1.21 1.28 1.28 ∑CT / ∑EP 1.91 1.93 1.72 1.72 1.55 1.55 1.61 1.61 Semi-FOV 49.49 49.49 45.32 45.32 44.42 44.42 45.69 45.69 f3 / (EP23+CT3) -10.91 -10.93 -9.89 -10.27 -9.79 -10.10 -11.07 -11.07 10*(|EP45 / f4|+|EP45 / f5|) 0.54 0.53 0.65 0.65 0.85 0.85 1.16 1.16 (CT5 / EP45) / (R10 / R11) -13.01 -13.25 -9.79 -9.80 -7.63 -7.63 -6.64 -6.64 (L-∑EP) / (T56+CT6) 5.71 5.69 5.62 5.62 5.39 5.39 5.75 5.75 f3 / L -1.86 -1.87 -1.88 -1.88 -1.85 -1.85 -2.09 -2.09 (f123+f456) / L 2.56 2.57 2.66 2.66 2.76 2.76 2.59 2.59 (DT11+DT21) / d1s 0.96 0.98 0.97 0.97 0.98 0.98 0.97 0.97 DT11 / DT61 0.28 0.28 0.31 0.31 0.34 0.34 0.27 0.27 D1s / D5s 0.46 0.45 0.46 0.46 0.39 0.39 0.43 0.43 |SAGH52| / EP50 0.43 0.55 0.43 0.43 0.40 0.40 0.36 0.36 d5m / Yc61-d5m / Yc62 1.52 1.52 1.71 1.71 2.58 2.58 1.28 1.28

[0168] Table 11

[0169] Table 12 shows some structural parameters of the optical imaging systems of Examples 1 to 8.

[0170]

[0171]

[0172] Table 12

[0173] Table 13 shows the effective focal lengths of the first to sixth lenses of the optical imaging systems of Examples 1 to 8.

[0174] Basic Data / Example 1 2 3 4 5 6 7 8 f1(mm) -21.62 -21.62 -55.86 -55.86 -41.47 -41.47 -61.85 -61.85 f2 (mm) 2.60 2.60 2.73 2.73 2.68 2.68 2.74 2.74 f3 (mm) -7.28 -7.28 -7.34 -7.34 -7.22 -7.22 -8.48 -8.48 f4 (mm) -5.52 -5.52 -5.81 -5.81 -5.75 -5.75 -3.71 -3.71 f5 (mm) 1.18 1.18 1.21 1.21 1.21 1.21 1.23 1.23 f6 (mm) -1.43 -1.43 -1.44 -1.44 -1.40 -1.40 -1.64 -1.64 f(mm) 2.70 2.70 2.74 2.74 2.75 2.75 2.77 2.77 Semi-FOV (°) 49.5 49.5 45.3 45.3 44.4 44.4 45.7 45.7

[0175] Table 13

[0176] This application also provides an imaging device, whose 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 system described above.

[0177] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0178] 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.

[0179] 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.

[0180] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical imaging system, characterized in that, The optical imaging system has six lenses with optical power, including: The optical imaging system comprises multiple lenses, from the object side to the image side, sequentially including a first lens to a sixth lens. The first lens has a negative effective focal length and a concave image side. The second lens has a positive effective focal length and a convex object side and an convex image side. The third lens has a negative effective focal length, a convex object side and a concave image side. The fourth lens has a negative effective focal length and a concave image side. The fifth lens has a positive effective focal length and a convex image side. The sixth lens has a negative effective focal length, a convex object side and a concave image side. Multiple through-hole elements, wherein the through-hole element located on the image side of the i-th lens and in at least partial contact with the i-th lens is the i-th through-hole element, where i is 1, 2, 3, 4, 5; The lens barrel, wherein the plurality of lens elements and the plurality of through-hole elements are disposed within the lens barrel; The outer diameter D0s of the object-side end face of the lens tube and the outer diameter D0m of the image-side end face of the lens tube satisfy the following condition: 0.36≤D0s / D0m≤0.39; The effective focal length f1 of the first lens and the height L of the lens barrel satisfy the following condition: -15.23≤f1 / L≤-5.53; The refractive index N1 of the first lens, the refractive index N2 of the second lens, the effective focal length f2 of the second lens, and the distance EP12 between the image side of the first through-hole element and the object side of the second through-hole element along the optical axis of the optical imaging system satisfy the following: 35.57≤(N1+N2)*f2 / EP12≤40.71; The distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis of the optical imaging system, the effective focal length f4 of the fourth lens, and the effective focal length f5 of the fifth lens satisfy the following: 0.53≤10*(|EP45 / f4|+|EP45 / f5|)≤1.16; The effective focal length f3 of the third lens and the height L of the lens barrel satisfy the following condition: -2.09≤f3 / L≤-1.

85.

2. The optical imaging system according to claim 1, characterized in that, The inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D1s of the object-side surface of the first through-hole element, and the inner diameter d1s of the object-side surface of the first through-hole element satisfy the following condition: 1.72≤d0s / (D1s-d1s)≤1.

79.

3. The optical imaging system according to claim 1, characterized in that, The radius of curvature R3 of the object side of the second lens and the effective focal length f2 of the second lens satisfy the following condition: 1.32≤R3 / f2≤6.

00.

4. The optical imaging system according to claim 1, characterized in that, The inner diameter d5m of the image side of the fifth through-hole element and the effective focal length f6 of the sixth lens satisfy the following condition: 1.68≤d5m / |f6|≤2.

16.

5. The optical imaging system according to claim 1, characterized in that, The height L of the lens barrel and the axial distance TD from the object side of the first lens to the image side of the sixth lens satisfy the following condition: 1.21≤L / TD≤1.

28.

6. The optical imaging system according to claim 1, characterized in that, The sum of the center thicknesses ∑CT of the first lens to the sixth lens on the optical axis of the optical imaging system and the sum of the spacing distances ∑EP between two adjacent through-hole elements along the optical axis satisfy the following condition: 1.55≤∑CT / ∑EP≤1.

93.

7. The optical imaging system according to claim 1, characterized in that, The maximum field of view (Semi-FOV) of the optical imaging system is half of the following: 44.42°≤Semi-FOV≤49.49°.

8. The optical imaging system according to claim 1, characterized in that, The effective focal length f3 of the third lens, the distance EP23 between the image side of the second through-hole element and the object side of the third through-hole element along the optical axis of the optical imaging system, and the center thickness CT3 of the third lens on the optical axis satisfy the following: -11.07≤f3 / (EP23+CT3)≤-9.

79.

9. The optical imaging system according to claim 1, characterized in that, The center thickness CT5 of the fifth lens on the optical axis of the optical imaging system, the distance EP45 between the image side of the fourth through-hole element and the object side of the fifth through-hole element along the optical axis, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy the following: -13.25≤(CT5 / EP45) / (R10 / R11)≤-6.

64.

10. The optical imaging system according to any one of claims 1 to 9, characterized in that, The following conditions must be met: the height L of the lens barrel, the sum of the spacing distances ∑EP between two adjacent through-hole elements along the optical axis of the optical imaging system, the air gap T56 between the fifth and sixth lenses on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis: 5.39≤(L-∑EP) / (T56+CT6)≤5.

75.

11. The optical imaging system according to any one of claims 1 to 9, characterized in that, The combined focal length f123 of the first lens, the second lens, and the third lens, the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens, and the height L of the lens barrel satisfy the following condition: 2.56≤(f123+f456) / L≤2.

76.

12. The optical imaging system according to any one of claims 1 to 9, characterized in that, The maximum effective radius DT11 of the object side of the first lens, the maximum effective radius DT21 of the object side of the second lens, and the inner diameter d1s of the object side of the first through-hole element satisfy the following condition: 0.96≤(DT11+DT21) / d1s≤0.

98.

13. The optical imaging system according to any one of claims 1 to 9, characterized in that, The maximum effective radius DT11 of the object side of the first lens and the maximum effective radius DT61 of the object side of the sixth lens satisfy the following condition: 0.27≤DT11 / DT61≤0.

34. The outer diameter D1s of the object side of the first through hole element and the outer diameter D5s of the object side of the fifth through hole element satisfy the following condition: 0.39≤D1s / D5s≤0.

46.

14. The optical imaging system according to any one of claims 1 to 9, characterized in that, The axial distance SAGH52 between the intersection of the image-side surface of the fifth lens and the optical axis of the optical imaging system and the vertex of the maximum effective diameter of the image-side surface of the fifth lens, and the interval EP50 between the fifth through-hole element and the image-side end face of the lens barrel along the optical axis direction, satisfy the following: 0.36≤|SAGH52| / EP50≤0.

55.

15. The optical imaging system according to any one of claims 1 to 9, characterized in that, The inner diameter d5m of the image side of the fifth through-hole element, the vertical distance Yc61 from the inflection point on the object side of the sixth lens to the optical axis of the optical imaging system, and the vertical distance Yc62 from the inflection point on the image side of the sixth lens to the optical axis satisfy the following condition: 1.28≤d5m / Yc61-d5m / Yc62≤2.58.

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