Imaging lens

Abstract

The application provides an imaging lens, which comprises six lenses, a plurality of supporting members and a lens barrel, at least one inflection point is arranged on the object side and the image side of the fourth lens respectively, at least one inflection point is arranged on the object side and the image side of the sixth lens respectively, the average value of Abbe numbers of the fourth lens and the fifth lens is less than 32; the lens barrel is used for accommodating the lenses and the supporting members; the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens and the interval EP45 of the fourth supporting member and the fifth supporting member along the optical axis direction satisfy: 1.0mm≤(N4+N5) / 2*EP45≤1.21; the combined focal length f45 of the fourth lens and the fifth lens, the maximum thickness CP4 of the fourth supporting member along the optical axis direction and the maximum thickness CP5 of the fifth supporting member along the optical axis direction satisfy: 18.0<f45 / (CP4+CP5)<30.0. The application solves the problem of poor processing performance of the rear-end lens in the prior art.

Description

[0001] This application is a divisional application of the invention patent filed on June 29, 2023, with application number 2023107974418 and invention title "Imaging Lens". Technical Field

[0002] This invention relates to the field of imaging equipment technology, and more specifically, to an imaging lens. Background Technology

[0003] With the continuous development of technology and the increasing demands for mobile phone photography, the improvement of imaging lens performance has also placed new requirements on the stability of imaging lens production. Six-element imaging lenses with large image planes have high requirements for light deflection, especially the rear lens, which bears significant pressure in correcting aberrations and ensuring image plane size. To increase the image plane size, the lens has a large curvature and a thicker center. The shape of the effective diameter area of ​​the lens and the thickness ratio between the edge and the center are easily designed to their limits, making manufacturing difficult. Furthermore, the rear lens, especially those with large step differences, bears significant pressure when resting with the lens barrel and mounting components. Simultaneously, to match the inner diameter of the mounting components, the dimensions of the lens structure are prone to unreasonable design. In addition, an unreasonable overall shape of the lens formed by the structure and the effective diameter area further complicates lens molding. In other words, how to control the shape and dimensions of the rear lens and the inner diameter of the mounting components, while ensuring image quality and good manufacturability, is a problem that urgently needs to be solved in imaging lens manufacturing. Summary of the Invention

[0004] The main objective of this invention is to provide an imaging lens to solve the problem of poor manufacturability of the rear lens in existing imaging lenses.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an imaging lens, comprising: six lenses, the six lenses sequentially include a first lens to a sixth lens from the object side to the image side of the imaging lens, at least one inflection point is respectively provided on the object side surface and the image side surface of the fourth lens, at least one inflection point is respectively provided on the object side surface and the image side surface of the sixth lens, and the average value of the Abbe numbers of the fourth lens and the fifth lens is less than 32; a plurality of supporting members, among the plurality of supporting members, the one located on the image side of the fourth lens and at least partially contacting the image side surface of the fourth lens is the fourth supporting member, and the one located on the image side of the fifth lens and at least partially contacting the image side surface of the fifth lens is the fifth supporting member; a lens barrel for accommodating the lenses and the supporting members; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the interval EP45 between the fourth supporting member and the fifth supporting member along the optical axis direction of the imaging lens satisfy: 1.0 mm ≤ (N4 + N5) / 2 * EP45; the inner diameter d5s of the object side surface of the fifth supporting member, the curvature radius R10 of the image side surface of the fifth lens, and the curvature radius R11 of the object side surface of the sixth lens satisfy: -16.5 < d5s / (R10 + R11) < -4.5; the curvature radius R8 of the image side surface of the fourth lens, the curvature radius R7 of the object side surface of the fourth lens, and the inner diameter d4s of the object side surface of the fourth supporting member satisfy: 3.5 < (R8 + R7) / d4s < 8.

[0006] According to another aspect of the present invention, there is provided an imaging lens, comprising: six lenses, the six lenses sequentially including a first lens to a sixth lens from the object side to the image side of the imaging lens, at least one inflection point being provided on the object side surface and the image side surface of the fourth lens respectively, and at least one inflection point being provided on the object side surface and the image side surface of the sixth lens respectively; a plurality of supporting members, among the plurality of supporting members, the fourth supporting member is located on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the fifth supporting member is located on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; a lens barrel for accommodating the lenses and the supporting members; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the interval EP45 between the fourth supporting member and the fifth supporting member along the optical axis direction of the imaging lens satisfy: 1.0 mm ≤ (N4 + N5) / 2 * EP45; the combined focal length f45 of the fourth lens and the fifth lens, the maximum thickness CP4 of the fourth supporting member along the optical axis direction, and the maximum thickness CP5 of the fifth supporting member along the optical axis direction satisfy: 18.0 < f45 / (CP4 + CP5) < 30.0. Generally, for a six-piece imaging lens to improve the image plane and meet the requirements of light deflection, the shapes of the rear lenses are relatively diverse. In particular, the fourth lens and the fifth lens with a large step difference have a large curvature, the center of the lens is relatively thick, and the ratio of the thickness of the edge to the center of the lens is likely to approach the design limit during design, making the lens molding difficult. The six-piece imaging lens with a large image plane in this application controls the Abbe numbers, refractive indices, combined focal length of the fourth lens and the fifth lens, as well as the distance and maximum thickness of the fourth supporting member and the fifth supporting member, so that the ability of light to converge and diverge when passing through the fourth lens and the fifth lens is stronger. The lens only needs a smaller curvature and a thinner edge to refract light well, reducing the thickness of the supporting areas of the fourth lens and the fifth lens, controlling the ratio of the thickness of the edge to the center, and facilitating the molding and processing of the fourth lens and the fifth lens.

[0007] According to another aspect of the present invention, an imaging lens is provided, comprising: six lenses, the six lenses being sequentially arranged from the object side to the image side of the imaging lens as a first lens to a sixth lens, wherein the object side and image side of the fourth lens each have at least one inflection point, and the object side and image side of the sixth lens each have at least one inflection point, and the average Abbe number of the fourth lens and the fifth lens is less than 32; and a plurality of bearing members, wherein the bearing member located on the image side of the fourth lens and at least partially in contact with the image side of the fourth lens is the fourth bearing member, and the bearing member located on the image side of the fifth lens and at least partially in contact with the image side of the fifth lens is the fifth bearing member. The lens barrel houses the lenses and their supports. The refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the distance EP45 between the fourth and fifth supports along the optical axis of the imaging lens satisfy the following: 1.0mm ≤ (N4+N5) / 2*EP45. The Abbe number V5 of the fifth lens, the Abbe number V4 of the fourth lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the distance EP45 between the fourth and fifth supports along the optical axis of the imaging lens satisfy the following: -1.5 < (V5-V4) / (f4+f5)*EP45 < -0.5. Generally, six-element imaging lenses, to enhance the image plane and meet the requirements of light deflection, have a variety of rear lens shapes. Especially the fourth and fifth lenses, with their large step differences, have greater curvature and are thicker at the center. The thickness ratio between the edge and center of the lens easily approaches the design limit during design, making lens molding more difficult. The large-image-plane six-element imaging lens of this application controls the Abbe number, refractive index, effective focal length of the fourth and fifth lenses, as well as the distance between the fourth and fifth support members, so that the light converges and diverges more effectively when passing through the fourth and fifth lenses. The lenses only need a small curvature and a thin edge to refract light well, which constrains the shape of the effective diameter region of the fourth and fifth lenses, while ensuring that the structural parts of the fourth and fifth lenses have sufficient support thickness, which is beneficial to the processing and shaping of the fourth and fifth lenses.

[0008] Furthermore, the combined focal length f45 of the fourth and fifth lenses, the maximum thickness CP4 of the fourth support member along the optical axis, and the maximum thickness CP5 of the fifth support member along the optical axis satisfy the following condition: 18.0 <f45 / (CP4+CP5)<30.0。

[0009] Furthermore, the Abbe number V5 of the fifth lens, the Abbe number V4 of the fourth lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the interval EP45 between the fourth and fifth support members along the optical axis of the imaging lens satisfy the following: -1.5 < (V5 - V4) / (f4 + f5) * EP45 < -0.5.

[0010] Furthermore, among the multiple bearing members, there is at least a fourth auxiliary bearing member that is at least partially in contact with the image side of the fourth bearing member. The distance EP45 between the fourth bearing member and the fifth bearing member along the optical axis of the imaging lens, the center thickness CT5 of the fifth lens, and the maximum thickness CP4b of the fourth auxiliary bearing member along the optical axis satisfy the following: 0.5 < |(EP45-CT5) / CP4b| < 5.0.

[0011] Furthermore, among the multiple supporting components, at least one fourth auxiliary supporting component is included, which is in at least partial contact with the image-side surface of the fourth supporting component. The outer diameter D4bs of the object-side surface of the fourth auxiliary supporting component, the outer diameter D4s of the object-side surface of the fourth supporting component, the effective half-aperture DT52 of the image-side surface of the fifth lens, and the effective half-aperture DT42 of the image-side surface of the fourth lens satisfy the following relationship: 1.3 < (D4bs - D4s) / (DT52 - DT42) < 2.1. Furthermore, the maximum thickness of the fourth supporting component along the optical axis and the maximum thickness of the fifth supporting component along the optical axis are both greater than 0.05 mm.

[0012] Furthermore, the inner diameter d5m of the image-side surface of the fifth support member, the radius of curvature R10 of the image-side surface of the fifth lens, and the radius of curvature R11 of the object-side surface of the sixth lens satisfy the following relationship: -19.5 <d5m / (R10+R11)<-5.5。

[0013] Furthermore, the inner diameter d4s of the object side of the fourth support member, the maximum thickness CP4 of the fourth support member along the optical axis, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R7 of the object side of the fourth lens satisfy the following condition: 10.8 < (d4s / CP4) / (R7 / R8) < 21.0.

[0014] Furthermore, the effective focal length f5 of the fifth lens, the inner diameter d5m of the image-side surface of the fifth support member, the inner diameter d5s of the object-side surface of the fifth support member, and the refractive index N5 of the fifth lens satisfy the following condition: 8.0 mm. <f5 / (d5m / d5s)*N5<9.5mm。

[0015] Furthermore, the combined focal length f456 of the fourth, fifth, and sixth lenses, the center thickness CT4 of the fourth lens, the center thickness CT5 of the fifth lens, the center thickness CT6 of the sixth lens, the outer diameter D5s of the object-side surface of the fifth support member, and the outer diameter D4s of the object-side surface of the fourth support member satisfy the following condition: -23.5mm <f456 / (CT4+CT5+CT6)*(D5s-D4s)<-8.5mm。

[0016] Furthermore, among the plurality of supporting members, at least a fifth auxiliary supporting member is included that is at least partially in contact with the image-side surface of the fifth supporting member. The outer diameter D4m of the image-side surface of the fourth supporting member, the effective half-aperture DT42 of the image-side surface of the fourth lens, the outer diameter D5bs of the object-side surface of the fifth auxiliary supporting member, and the effective half-aperture DT62 of the image-side surface of the sixth lens satisfy the following relationship: 5.5 <D4m / DT42+D5bs / DT62<6.1。

[0017] Furthermore, the effective focal length f of the imaging lens, half of the maximum field of view (Semi-FOV) of the imaging lens, and the minimum aperture d0smin of the lens barrel on the object side satisfy the following relationship: 1.0 <f*tan(Semi-FOV) / d0smin<3.0。

[0018] Furthermore, among the plurality of supporting members, at least one supporting member is located on the image side of the first lens and is at least partially in contact with the image side surface of the first lens. The inner diameter d1s of the object side surface of the first supporting member, the center thickness CT1 of the first lens, and the refractive index N1 of the first lens satisfy the following relationship: 4.0 <d1s / CT1*N1<5.3。

[0019] Furthermore, the maximum height L of the lens barrel along the optical axis, the sum of the center thicknesses of all lenses ∑CT, and the aperture number FNO of the imaging lens satisfy the following relationship: 2.4 <L / ∑CT*FNO<3.9。

[0020] Furthermore, the outer diameter D0m of the image-side end face of the lens tube and the inner diameter d0m of the image-side end face of the lens tube satisfy the following condition: 23.9 mm. 2 <π*(D0m 2 -d0m 2 <31.5mm 2 .

[0021] Furthermore, the inner diameter d5s of the object-side surface of the fifth support member, the distance Yc62 from the inflection point on the image-side surface of the sixth lens that is closest to the optical axis, and the distance Yc61 from the inflection point on the object-side surface of the sixth lens that is closest to the optical axis satisfy the following condition: 6.5 <d5s / (Yc62-Yc61)<7.7。

[0022] The imaging lens, applying the technical solution of this invention, includes six lenses, multiple support members, and a lens barrel. The six lenses, from the object side to the image side, sequentially include a first lens to a sixth lens. The fourth lens has at least one inflection point on both its object-side and image-side surfaces, and the sixth lens also has at least one inflection point on both its object-side and image-side surfaces. The average Abbe number of the fourth and fifth lenses is less than 32. Among the multiple support members, the one located on the image side of the fourth lens and at least partially in contact with the image-side surface of the fourth lens is the fourth support member, and the one located on the image side of the fifth lens and at least partially in contact with the image-side surface of the fifth lens is the sixth support member. The image-side surface of the fifth lens at least partially contacts the fifth support member; the lens barrel is used to house the lens and the support member; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the distance EP45 between the fourth and fifth support members along the optical axis of the imaging lens satisfy: 1.0mm ≤ (N4+N5) / 2*EP45 ≤ 1.21; the combined focal length f45 of the fourth and fifth lenses, the maximum thickness CP4 of the fourth support member along the optical axis, and the maximum thickness CP5 of the fifth support member along the optical axis satisfy: 18.0 <f45 / (CP4+CP5)<30.0。

[0023] In general, six-element imaging lenses employ a variety of rear lens shapes to enhance the image plane and meet the requirements of light refraction. The fourth and fifth lenses, in particular, have significant curvature and are thicker at the center. The thickness ratio between the edge and center of the lens is prone to approaching design limits during the design process, making lens molding more difficult. This application's large-image-plane six-element imaging lens, by controlling the Abbe number, refractive index, combined focal length, and the spacing and maximum thickness of the fourth and fifth support components, enhances the convergence and divergence of light as it passes through the fourth and fifth lenses. The lenses require only a smaller curvature and thinner edges to effectively refract light, reducing the thickness of the support areas of the fourth and fifth lenses and controlling the edge-to-center thickness ratio, which facilitates the molding and processing of the fourth and fifth lenses. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A schematic diagram of the imaging lens of an optional embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram showing partial parameters of an imaging lens according to an optional embodiment of the present invention is shown;

[0027] Figure 3 A schematic diagram of the imaging lens of Example 1 of the present invention in a first state is shown;

[0028] Figure 4 A schematic diagram of the imaging lens of Example 1 of the present invention in a second state is shown;

[0029] Figures 5 to 8 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 1 of the present invention are shown respectively.

[0030] Figure 9 A schematic diagram of the imaging lens of Example 2 of the present invention in a first state is shown;

[0031] Figure 10 A schematic diagram of the imaging lens of Example 2 of the present invention in a second state is shown;

[0032] Figures 11 to 14 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 2 of the present invention are shown respectively.

[0033] Figure 15 A schematic diagram of the imaging lens of Example 3 of the present invention in a first state is shown;

[0034] Figure 16 A schematic diagram of the imaging lens of Example 3 of the present invention in a second state is shown;

[0035] Figures 17 to 20 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 3 of the present invention are shown respectively.

[0036] Figure 21 A schematic diagram of the imaging lens of Example 4 of the present invention in a first state is shown;

[0037] Figure 22 A schematic diagram of the imaging lens of Example 4 of the present invention in a second state is shown;

[0038] Figures 23 to 26 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 4 of the present invention are shown respectively.

[0039] The above figures include the following reference numerals:

[0040] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; P1, First spacer element; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P2, Second spacer element; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; P3, Third spacer element; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; P4, Fourth spacer element; P4b, Fourth auxiliary spacer element; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; P5, Fifth spacer element; P5b, Fifth auxiliary spacer element; E6, Sixth lens; S11, Object-side surface of the sixth lens; S12, Image-side surface of the sixth lens. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] In this text, 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 determination 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 in the paraxial region, usually the R value on the lens database (lens data) in optical software). Taking the object side surface as an example, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; taking the image side surface as an example, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0047] In order to solve the problem of poor processability of the rear lens of the imaging lens in the prior art, the present invention provides an imaging lens.

[0048] Embodiment 1

[0049] As Figures 1 to 26 shown, the imaging lens includes six lenses, a plurality of supporting members, and a lens barrel. The six lenses sequentially include a first lens to a sixth lens from the object side to the image side of the imaging lens. At least one anastigmatic point is respectively provided on the object side surface and the image side surface of the fourth lens, and at least one anastigmatic point is respectively provided on the object side surface and the image side surface of the sixth lens. The average value of the Abbe numbers of the fourth lens and the fifth lens is less than 32; among the plurality of supporting members, the fourth supporting member is located on the image side of the fourth lens and is at least partially in contact with the image side surface of the fourth lens, and the fifth supporting member is located on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens; the lens barrel is used to accommodate the lenses and the supporting members; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the interval EP45 between the fourth supporting member and the fifth supporting member along the optical axis direction of the imaging lens satisfy: 1.0 mm ≤ (N4 + N5) / 2 * EP45; the inner diameter d5s of the object side surface of the fifth supporting member, the radius of curvature R10 of the image side surface of the fifth lens, and the radius of curvature R11 of the object side surface of the sixth lens satisfy: -16.5 < d5s / (R10 + R11) < -4.5; the radius of curvature R8 of the image side surface of the fourth lens, the radius of curvature R7 of the object side surface of the fourth lens, and the inner diameter d4s of the object side surface of the fourth supporting member satisfy: 3.5 < (R8 + R7) / d4s < 8.

[0050] In general, for a six-piece imaging lens, in order to improve the image plane and meet the requirements of light deflection, the shapes of the rear lenses are relatively diverse. In particular, the fourth and fifth lenses with a large step have a relatively large curvature, the center of the lens is thicker, and the ratio of the thickness of the edge to the center of the lens is likely to approach the design limit during design, making the lens forming difficult. The six-piece imaging lens with a large image plane of the present application controls the Abbe number, refractive index, curvature radii of the object side and image side of the fourth and fifth lenses, as well as the distance and inner diameter size between the fourth supporting member and the fifth supporting member. By utilizing the stronger light refraction ability of the high-refractive-index material, the ability of light to converge and diverge when passing through the fourth and fifth lenses is stronger. The lens only needs a relatively small curvature and a thinner edge to refract light well, restricting the shape of the effective diameter region of the fourth and fifth lenses. At the same time, it ensures that the structural parts of the fourth and fifth lenses have sufficient supporting thickness, and the bending degree when the fourth and fifth lenses transition between the effective diameter region and the structural part is not too large, making the lens shape more reasonable and facilitating the processing and forming of the fourth and fifth lenses.

[0051] At the same time, by combining the control of the inner diameter size of the fourth supporting member and the fifth supporting member and the shape of the sixth lens, the present application can effectively block the excess marginal light after refraction by the fourth and fifth lenses and correct the light deflection angle, ensuring that the imaging lens has a large image plane and high imaging quality.

[0052] In this embodiment, the maximum thickness of the fourth supporting member along the optical axis direction and the maximum thickness of the fifth supporting member along the optical axis direction are both greater than 0.05 mm. The relatively thick fourth and fifth supporting members have sufficient strength to support the fourth, fifth, and sixth lenses, improving the stability of the imaging lens.

[0053] In this embodiment, the following relationship is satisfied among the inner diameter d5m of the image side of the fifth supporting member, the curvature radius R10 of the image side of the fifth lens, and the curvature radius R11 of the object side of the sixth lens: -19.5 < d5m / (R10 + R11) < -5.5. By restricting d5m / (R10 + R11) within a reasonable range, it is beneficial to meet the optical performance of the imaging lens, ensure the light transmission amount, improve the light imaging quality, and avoid the formation of ghost images and stray light due to the reflection of excess light between the lenses.

[0054] In this embodiment, the following relationship is satisfied among the inner diameter d4s of the object side surface of the fourth bearing member, the maximum thickness CP4 of the fourth bearing member along the optical axis direction, the curvature radius R8 of the image side surface of the fourth lens, and the curvature radius R7 of the object side surface of the fourth lens: 10.8 < (d4s / CP4) / (R7 / R8) < 21.0. By restricting (d4s / CP4) / (R7 / R8) within a reasonable range and reasonably controlling the curvature radius of the fourth lens, it is possible to restrain, to a certain extent, the stray light generated when marginal rays hit the structural area. The reasonable setting of the maximum thickness of the fourth bearing member and the inner diameter of its object side surface is beneficial for the inner edge of the bearing member to be less affected when in a high-temperature and high-humidity environment, and can effectively block the excess light passing through the edge of the fourth lens.

[0055] In this embodiment, the following relationship is satisfied among the effective focal length f5 of the fifth lens, the inner diameter d5m of the image side surface of the fifth bearing member, the inner diameter d5s of the object side surface of the fifth bearing member, and the refractive index N5 of the fifth lens: 8.0 mm < f5 / (d5m / d5s) * N5 < 9.5 mm. By restricting f5 / (d5m / d5s) * N5 within a reasonable range, it is possible to ensure the effective focal length of the fifth lens, adjust the inner diameter size of the fifth bearing member, thereby controlling the light intensity and light output of the off-axis field of view of the fifth lens, ensuring the rationality of the structure of the fifth lens and reducing the space of the lens in the lens barrel, which is beneficial for adapting to different imaging lenses and improving the imaging quality of the entire imaging lens.

[0056] In this embodiment, the following relationship is satisfied among the Abbe number V5 of the fifth lens, the Abbe number V4 of the fourth lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the interval EP45 between the fourth bearing member and the fifth bearing member along the optical axis direction of the imaging lens: -1.5 < (V5 - V4) / (f4 + f5) * EP45 < -0.5. By restricting (V5 - V4) / (f4 + f5) * EP45 within a reasonable range, under the conditions of controlling the effective focal lengths and materials of the fourth lens and the fifth lens, by adjusting the interval distance between the fourth bearing member and the fifth bearing member along the optical axis direction, the fourth lens and the fifth lens can have a large light deflection ability.

[0057] In this embodiment, the following relationship is satisfied among the combined focal length f45 of the fourth lens and the fifth lens, the maximum thickness CP4 of the fourth bearing member along the optical axis direction, and the maximum thickness CP5 of the fifth bearing member along the optical axis direction: 18.0 < f45 / (CP4 + CP5) < 30.0. By restricting f45 / (CP4 + CP5) within a reasonable range, controlling the maximum thicknesses of the fourth bearing member and the fifth bearing member can reduce the thickness of the bearing areas of the fourth lens and the fifth lens, control the thickness ratio of the edge to the center, and combined with the constraint of the effective focal length, it is beneficial for the forming and processing of the fourth lens and the fifth lens.

[0058] In this embodiment, the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens, the central thickness CT4 of the fourth lens, the central thickness CT5 of the fifth lens, the central thickness CT6 of the sixth lens, the outer diameter D5s of the object side surface of the fifth supporting member, and the outer diameter D4s of the object side surface of the fourth supporting member satisfy: -23.5 mm < f456 / (CT4 + CT5 + CT6) * (D5s - D4s) < -8.5 mm. By restricting f456 / (CT4 + CT5 + CT6) * (D5s - D4s) within a reasonable range, the divergence direction of light can be adjusted, making the lens group structure more manufacturable.

[0059] In this embodiment, among the multiple supporting members, at least a fourth auxiliary supporting member that at least partially contacts the image side surface of the fourth supporting member is included. The outer diameter D4bs of the object side surface of the fourth auxiliary supporting member, the outer diameter D4s of the object side surface of the fourth supporting member, the effective semi-aperture DT52 of the image side surface of the fifth lens, and the effective semi-aperture DT42 of the image side surface of the fourth lens satisfy: 1.3 < (D4bs - D4s) / (DT52 - DT42) < 2.1. By restricting (D4bs - D4s) / (DT52 - DT42) within a reasonable range, on the premise that the effective semi-apertures of the image side surfaces of the fifth lens and the fourth lens ensure sufficient light passing amount, the outer diameters of the object side surfaces of the fourth supporting member and the fourth auxiliary supporting member are reasonably set, which can ensure that there is sufficient bearing surface between the fourth lens, the fifth lens, the fourth supporting member, and the fourth auxiliary supporting member for bearing, and is beneficial to solving the problem of poor stability caused by the large radial step difference between the fourth lens and the fifth lens.

[0060] In this embodiment, the interval EP45 between the fourth supporting member and the fifth supporting member along the optical axis direction of the imaging lens, the central thickness CT5 of the fifth lens, and the maximum thickness CP4b of the fourth auxiliary supporting member along the optical axis direction satisfy: 0.5 < |(EP45 - CT5) / CP4b| < 5.0. By restricting |(EP45 - CT5) / CP4b| within a reasonable range, the thickness of the bearing area of the fifth lens can be restricted to a certain extent. Combining with the central thickness of the fifth lens, the thickness ratio of the bearing area thickness and the central thickness of the fifth lens is further controlled, which is beneficial to the forming process of the fifth lens.

[0061] In this embodiment, at least one of the plurality of bearing members includes a fifth auxiliary bearing member that at least partially contacts the image side surface of the fifth bearing member. The following relationship is satisfied among the outer diameter D4m of the image side surface of the fourth bearing member, the effective semi-aperture DT42 of the image side surface of the fourth lens, the outer diameter D5bs of the object side surface of the fifth auxiliary bearing member, and the effective semi-aperture DT62 of the image side surface of the sixth lens: 5.5 < D4m / DT42 + D5bs / DT62 < 6.1. By restricting D4m / DT42 + D5bs / DT62 within a reasonable range, it is beneficial to improve the stability of the imaging lens structure, adjust the imaging quality of the imaging lens, and ensure that the imaging of light can meet the requirements of the imaging lens.

[0062] In this embodiment, the following relationship is satisfied among the effective focal length f of the imaging lens, half of the maximum field angle Semi-FOV of the imaging lens, and the minimum aperture d0smin on the object side of the lens barrel: 1.0 < f * tan(Semi-FOV) / d0smin < 3.0. By restricting f * tan(Semi-FOV) / d0smin within a reasonable range, the minimum aperture on the object side of the lens barrel and the field angle of the imaging lens can be effectively controlled, the size of the imaging lens can be effectively reduced, the optical performance of the lens can be ensured, and it is easier for accessory processing and injection molding and stable assembly.

[0063] In this embodiment, at least one of the plurality of bearing members includes a first bearing member located on the image side of the first lens and at least partially contacting the image side surface of the first lens. The following relationship is satisfied among the inner diameter d1s of the object side surface of the first bearing member, the central thickness CT1 of the first lens, and the refractive index N1 of the first lens: 4.0 < d1s / CT1 * N1 < 5.3. By restricting d1s / CT1 * N1 within a reasonable range, the inner diameter of the object side surface of the first bearing member can be adjusted, the light passing amount meeting the requirements of the imaging lens can be ensured, it is beneficial to the structural adjustment of the first lens, and the processing difficulty of the lens can be reduced.

[0064] In this embodiment, the following relationship is satisfied among the maximum height L of the lens barrel along the optical axis direction, the sum ∑CT of the central thicknesses of all lenses, and the f-number FNO of the imaging lens: 2.4 < L / ∑CT * FNO < 3.9. By restricting L / ∑CT * FNO within a reasonable range, by adjusting the maximum height of the lens barrel along the optical axis direction, the light incident amount of the lens can be ensured to meet the requirements, and the lens structure is more compact and stable.

[0065] In this embodiment, the following relationship is satisfied between the outer diameter D0m and the inner diameter d0m of the image side end surface of the lens barrel: 23.9 mm 2 <π * (D0m 2 - d0m 2 ) < 31.5 mm 2 . By making π * (D0m 2 - d0m 2)Limited within a reasonable range, adjusting the outer diameter and inner diameter of the image-side end face of the lens barrel can ensure that the area of the image-side end face of the lens barrel is within a reasonable range and reduce the forming and processing difficulty of the lens barrel.

[0066] In this embodiment, the inner diameter d5s of the object-side surface of the fifth bearing member, the distance Yc62 from the optical axis to the inflection point with the shortest distance from the optical axis on the image-side surface of the sixth lens, and the distance Yc61 from the optical axis to the inflection point with the shortest distance from the optical axis on the object-side surface of the sixth lens satisfy: 6.5 < d5s / (Yc62 - Yc61) < 7.7. By limiting d5s / (Yc62 - Yc61) within a reasonable range, the shape of the effective diameter of the sixth lens can be controlled. The reasonable setting of the inner diameter of the object-side surface of the fifth bearing member is beneficial to absorbing the excess marginal light, and the best imaging quality can be obtained after the light is refracted by the sixth lens.

[0067] Embodiment 2

[0068] As Figures 1 to 26 shown, the imaging lens includes six lenses, multiple bearing members and a lens barrel. The six lenses sequentially include the first lens to the sixth lens from the object side to the image side of the imaging lens. The object-side surface and the image-side surface of the fourth lens each have at least one inflection point, and the object-side surface and the image-side surface of the sixth lens each have at least one inflection point. The average Abbe number of the fourth lens and the fifth lens is less than 32; among the multiple bearing members, the fourth bearing member is located on the image side of the fourth lens and at least partially contacts the image-side surface of the fourth lens, and the fifth bearing member is located on the image side of the fifth lens and at least partially contacts the image-side surface of the fifth lens; the lens barrel is used to accommodate the lenses and the bearing members; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the interval EP45 between the fourth bearing member and the fifth bearing member along the optical axis direction of the imaging lens satisfy: 1.0 mm ≤ (N4 + N5) / 2 * EP45; the combined focal length f45 of the fourth lens and the fifth lens, the maximum thickness CP4 of the fourth bearing member along the optical axis direction, and the maximum thickness CP5 of the fifth bearing member along the optical axis direction satisfy: 18.0 < f45 / (CP4 + CP5) < 30.0.

[0069] In general, six-element imaging lenses employ a variety of rear lens shapes to enhance the image plane and meet the requirements of light refraction. The fourth and fifth lenses, in particular, have significant curvature and are thicker at the center. The thickness ratio between the edge and center of the lens is prone to approaching design limits during the design process, making lens molding more difficult. This application's large-image-plane six-element imaging lens, by controlling the Abbe number, refractive index, combined focal length, and the spacing and maximum thickness of the fourth and fifth support components, enhances the convergence and divergence of light as it passes through the fourth and fifth lenses. The lenses require only a smaller curvature and thinner edges to effectively refract light, reducing the thickness of the support areas of the fourth and fifth lenses and controlling the edge-to-center thickness ratio, which facilitates the molding and processing of the fourth and fifth lenses.

[0070] This embodiment may also include other parametric formulas as described in Embodiment 1, which will not be elaborated here.

[0071] Example 3

[0072] like Figures 1 to 26 As shown, the imaging lens includes six lenses, multiple support members, and a lens barrel. The six lenses, from the object side to the image side, sequentially include a first lens to a sixth lens. The fourth lens has at least one inflection point on both its object-side and image-side surfaces, and the sixth lens also has at least one inflection point on both its object-side and image-side surfaces. The average Abbe number of the fourth and fifth lenses is less than 32. Among the multiple support members, the one located on the image side of the fourth lens and in at least partial contact with its image-side surface is the fourth support member, and the one located on the image side of the fifth lens and in at least partial contact with its image-side surface is the fifth support member. The lens barrel... Used to accommodate lenses and supports; wherein, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the distance EP45 between the fourth and fifth supports along the optical axis of the imaging lens satisfy: 1.0mm≤(N4+N5) / 2*EP45; the Abbe number V5 of the fifth lens, the Abbe number V4 of the fourth lens, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, and the distance EP45 between the fourth and fifth supports along the optical axis of the imaging lens satisfy: -1.5<(V5-V4) / (f4+f5)*EP45<-0.5.

[0073] In general, six-element imaging lenses employ a variety of rear lens shapes to enhance the image plane and meet the requirements of light refraction. The fourth and fifth lenses, in particular, have significant curvature and are thicker at the center. The thickness ratio between the edge and center of the lens easily approaches the design limit during the design process, making lens molding more difficult. This application's large-image-plane six-element imaging lens, by controlling the Abbe number, refractive index, effective focal length, and the distance between the fourth and fifth support components of the fourth and fifth lenses, enhances the convergence and divergence of light as it passes through them. The lenses require only a smaller curvature and thinner edges to effectively refract light, constraining the shape of the effective diameter region of the fourth and fifth lenses while ensuring sufficient support thickness in their structural components, which is beneficial for the manufacturing and molding of the fourth and fifth lenses.

[0074] This embodiment may also include other parametric formulas as described in Embodiment 1, which will not be elaborated here.

[0075] Optionally, the imaging lens 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 imaging lens in this application may employ multiple lenses, such as the six lenses described above. By rationally allocating the effective focal length, surface shape, center thickness of each lens, and on-axis distance between each lens, the aperture of the imaging lens can be effectively increased, the sensitivity of the lens reduced, and the manufacturability of the lens improved, making the imaging lens more suitable for manufacturing and processing and applicable to portable electronic devices such as smartphones.

[0076] 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 its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0077] However, those skilled in the art will understand that the number of lenses constituting the 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 are described as an example in the embodiments, the imaging lens is not limited to including six lenses. If necessary, the imaging lens may also include other numbers of lenses.

[0078] Figure 1 and Figure 2 A schematic diagram of the structure of an imaging lens of this application is shown. Figure 1The diagram also indicates parameters such as d0s, D4s, and D4m to clearly and intuitively explain their meaning. To better illustrate the imaging lens structure and specific surface features, these parameters will not be shown in the accompanying diagrams when explaining specific examples later.

[0079] Where Dis refers to the outer diameter of the object side surface of the i-th support member, dis refers to the inner diameter of the object side surface of the i-th support member, Dim refers to the outer diameter of the image side surface of the i-th support member, dim refers to the inner diameter of the image side surface of the i-th support member, CPi refers to the maximum thickness of the i-th support member, which is also the maximum distance along the optical axis from the object side surface to the image side surface of the i-th support member, and EPij refers to the distance along the optical axis between the image side surface of the i-th support member and the object side surface of the j-th support member, 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 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.

[0080] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of imaging lenses applicable to the above embodiments.

[0081] It should be noted that the following examples include both a first state and a second state. In the same example, the first, second, third, fourth, fifth, and sixth lenses of the imaging lens have the same radius of curvature, center thickness, inter-lens spacing, and higher-order image coefficients in both states. However, the lens barrel P0, the thickness of the bearing member, the maximum thickness of the bearing member, the inner and outer diameters of the bearing member, and the distance between the bearing members are different, as are the shapes of some lenses. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0082] It should be noted that any of the examples one through four below are applicable to all embodiments of this application.

[0083] Example 1

[0084] like Figures 3 to 8 As shown, an imaging lens of Example 1 of this application is described. Figure 3 A schematic diagram of the imaging lens in Example 1 in its first state is shown. Figure 4 A schematic diagram of the imaging lens in Example 1 in the second state is shown.

[0085] like Figure 3 and Figure 4As shown, the imaging lens, from the object side to the image side, includes, in sequence, a first lens E1, a first support P1, a second lens E2, a second support P2, a third lens E3, a third support P3, a fourth lens E4, a fourth support P4, a fourth auxiliary support P4b, a fifth lens E5, a fifth support P5, a fifth auxiliary support P5b, and a sixth lens E6. Specifically, between the fourth, fifth, and sixth lenses, which have large step differences, there are two support members between adjacent lenses to provide strong support and ensure sufficient support positions in the radial direction.

[0086] exist Figure 3 and Figure 4 In this system, the supporting components are all located between two adjacent lenses, and the first supporting component P1 to the fifth auxiliary supporting component P5b all abut against part of the inner wall surface of the lens barrel P0. Specifically, they abut against the inner wall surface of the lens barrel P0 that is parallel to the optical axis. Furthermore, the first lens E1 to the sixth lens E6 are all spaced apart and do not directly abut against each other.

[0087] like Figure 3 and Figure 4 As shown, the object-side surface of the first lens is S1, the image-side surface of the first lens is S2, the object-side surface of the second lens is S3, the image-side surface of the second lens is S4, the object-side surface of the third lens is S5, the image-side surface of the third lens is S6, the object-side surface of the fourth lens is S7, the image-side surface of the fourth lens is S8, the object-side surface of the fifth lens is S9, the image-side surface of the fifth lens is S10, the object-side surface of the sixth lens is S11, and the image-side surface of the sixth lens is S12.

[0088] Table 1 shows the basic structural parameters of the imaging lens in Example 1, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0089] Face number face shape radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless endless STO spherical endless -0.7802 S1 aspherical 2.0676 0.9654 1.498 81.56 -0.0625 S2 aspherical 5.6024 0.1737 -29.3231 S3 aspherical 5.9432 0.3000 1.693 31.08 -10.3707 S4 aspherical 4.7359 0.3759 4.5047 S5 aspherical -1844.2422 0.4497 1.498 81.56 -98.0000 S6 aspherical -15.2939 0.2196 97.8687 S7 aspherical 13.7221 0.3500 1.677 19.24 42.6511 S8 aspherical 6.6782 0.4229 -26.1186 S9 aspherical -125.7112 0.6600 1.814 41.00 -6.7889 S10 aspherical -4.5738 0.6829 -0.4147 S11 aspherical 4.1520 0.5154 1.537 55.71 -6.9263 S12 aspherical 1.5206 0.3485 -7.5271 S13 spherical endless 0.2102 1.517 64.20 S14 spherical endless 0.8456 S15 spherical endless

[0090] In Table 1 above, S13 is the object side of the filter, S14 is the image side of the filter, and S15 is the imaging surface.

[0091] In Example 1, the object-side surface and image-side surface of any one of the lenses from the first lens E1 to the sixth lens E6 are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0092]

[0093] 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 2 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 the aspherical mirrors S1-S12 in Example 1.

[0094] Face number A4 A6 A8 A10 A12 A14 A16 s1 1.25E-02 2.15E-03 -1.95E-04 -9.70E-05 -7.21E-05 4.67E-06 -9.13E-06 s2 -3.65E-02 -7.58E-03 -3.48E-03 -2.10E-03 -5.36E-04 -2.49E-04 -9.68E-05 s3 -2.61E-01 -6.02E-02 4.71E-03 8.38E-02 -3.99E-02 -3.70E-03 1.23E-02 s4 8.58E-03 3.83E-02 8.16E-03 2.10E-03 2.32E-04 -3.79E-04 -3.84E-04 s5 -6.48E-02 4.39E-02 -1.91E-02 -3.37E-02 -7.34E-03 6.07E-03 -2.92E-03 s6 -8.64E-02 6.22E-02 5.14E-02 2.57E-02 6.76E-03 -2.03E-03 -5.35E-03 s7 -5.43E-01 1.05E-02 -6.59E-03 6.40E-03 3.69E-03 5.98E-03 4.14E-03 s8 -8.66E-01 1.33E-01 -1.38E-03 4.04E-03 -5.71E-03 -3.83E-03 -1.36E-02 s9 -9.52E-01 2.33E-01 3.76E-02 -4.26E-02 3.03E-02 5.96E-02 -3.16E-03 s10 1.76E-01 7.77E-02 1.89E-02 4.98E-02 6.28E-03 2.70E-02 2.11E-02 s11 -3.10E+00 1.50E+00 -7.76E-01 2.60E-01 -1.51E-01 8.25E-03 -3.61E-02 s12 -4.56E+00 1.30E+00 -3.31E-01 6.11E-02 4.43E-02 2.14E-01 3.63E-02 Face number A18 A20 A22 A24 A26 A28 A30 s1 -9.86E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s2 -5.07E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s3 -7.82E-05 -8.21E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s4 -2.16E-04 -8.40E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s5 -1.29E-02 -1.09E-02 -1.57E-03 4.85E-03 5.15E-03 2.52E-03 5.76E-04 s6 -5.47E-03 -3.85E-03 -2.13E-03 -8.22E-04 -2.42E-04 0.00E+00 0.00E+00 s7 2.33E-03 7.24E-04 1.45E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s8 -1.29E-02 -9.77E-03 -6.19E-03 -4.46E-03 -2.54E-03 -1.04E-03 -1.94E-04 s9 -1.69E-02 7.58E-04 8.12E-03 2.50E-03 0.00E+00 0.00E+00 0.00E+00 s10 1.89E-02 1.44E-02 1.18E-02 6.92E-03 3.60E-03 1.62E-03 4.31E-04 s11 5.27E-03 -1.75E-02 5.59E-03 -4.34E-03 9.43E-04 -2.24E-04 0.00E+00 s12 2.28E-02 2.64E-02 7.28E-02 5.47E-02 3.41E-02 1.16E-02 3.62E-03

[0095] Table 2

[0096] Figure 5 The on-axis chromatic aberration curve of the imaging lens in Example 1 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the imaging lens. Figure 6 The astigmatism curve of the imaging lens in Example 1 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 7 The distortion curve of the imaging lens in Example 1 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 8 The magnification chromatic aberration curve of the imaging lens in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the imaging lens.

[0097] according to Figures 5 to 8 As can be seen, the imaging lens given in Example 1 can achieve good image quality.

[0098] Example 2

[0099] like Figures 9 to 14 As shown, an imaging lens of Example 2 of this application is described. Figure 9 A schematic diagram of the imaging lens in Example 2 in its first state is shown. Figure 10 A schematic diagram of the imaging lens in Example 2 in its second state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0100] exist Figure 9 and Figure 10 In this system, the support components are located between two adjacent lenses, and there are two support components between two adjacent lenses in the fourth, fifth and sixth lenses with large step differences, to provide strong support and ensure sufficient support position in the radial direction.

[0101] Table 3 shows the basic structural parameters of the imaging lens in Example 2, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0102] Face number face shape radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless endless STO spherical endless -0.4152 S1 aspherical 1.9878 0.7900 1.498 81.56 -0.0827 S2 aspherical 5.8680 0.1979 -25.1057 S3 aspherical 7.4522 0.3000 1.693 31.08 -95.3215 S4 aspherical 5.2036 0.3775 9.1070 S5 aspherical 160.7445 0.4680 1.498 81.56 -98.0000 S6 aspherical -14.6282 0.2465 97.8775 S7 aspherical 29.4276 0.3514 1.677 19.24 -98.0000 S8 aspherical 7.9083 0.4260 14.2040 S9 aspherical -46.9669 0.6628 1.814 41.00 34.0963 S10 aspherical -4.5404 0.6765 -0.1359 S11 aspherical 3.6078 0.5920 1.537 55.71 -22.4390 S12 aspherical 1.4560 0.4159 -6.1988 S13 spherical endless 0.2102 1.517 64.20 S14 spherical endless 0.8052 S15 spherical endless 0

[0103] Table 3

[0104] Table 4 gives the higher-order coefficients of S1-S12 that can be used for each aspherical lens in Example 2. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0105]

[0106]

[0107] Table 4

[0108] Figure 11 The on-axis chromatic aberration curve of the imaging lens in Example 2 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the imaging lens. Figure 12 The astigmatism curve of the imaging lens in Example 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 13 The distortion curve of the imaging lens in Example 2 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 14 The magnification chromatic aberration curve of the imaging lens in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the imaging lens.

[0109] according to Figures 11 to 14 As can be seen, the imaging lens given in Example 2 can achieve good image quality.

[0110] Example 3

[0111] like Figures 15 to 20 As shown, an imaging lens of Example 3 of this application is described. Figure 15 A schematic diagram of the imaging lens in Example 3 in its first state is shown. Figure 16 A schematic diagram of the imaging lens in Example 3 in its second state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0112] exist Figure 15 and Figure 16 In this system, the support components are located between two adjacent lenses, and there are two support components between two adjacent lenses in the fourth, fifth and sixth lenses with large step differences, to provide strong support and ensure sufficient support position in the radial direction.

[0113] Table 5 shows the basic structural parameters of the imaging lens in Example 3, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0114]

[0115]

[0116] Table 5

[0117] Table 6 gives the higher-order coefficients of S1-S12 that can be used for each aspherical lens in Example 3. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0118]

[0119]

[0120] Table 6

[0121] Figure 17 The on-axis chromatic aberration curve of the imaging lens in Example 3 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the imaging lens. Figure 18 The astigmatism curve of the imaging lens in Example 3 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 19 The distortion curve of the imaging lens in Example 3 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 20 The magnification chromatic aberration curve of the imaging lens in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the imaging lens.

[0122] according to Figures 17 to 20 As can be seen, the imaging lens given in Example 3 can achieve good image quality.

[0123] Example 4

[0124] like Figures 21 to 26 As shown, an imaging lens of Example 4 of this application is described. Figure 21 A schematic diagram of the imaging lens in Example 4 in its first state is shown. Figure 22 A schematic diagram of the imaging lens in Example 4 in its second state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0125] exist Figure 21 and Figure 22 In this system, the support components are located between two adjacent lenses, and there are two support components between two adjacent lenses in the fourth, fifth and sixth lenses with large step differences, to provide strong support and ensure sufficient support position in the radial direction.

[0126] Table 7 shows the basic structural parameters of the imaging lens in Example 4, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0127] Face number face shape radius of curvature thickness Refractive index Abbe number Conic coefficient OBJ spherical endless endless STO spherical endless -0.5921 S1 aspherical 1.9927 0.7981 1.498 81.56 -0.0990 S2 aspherical 5.8841 0.1665 -34.1254 S3 aspherical 6.8525 0.3000 1.693 31.08 -71.6931 S4 aspherical 4.7859 0.3721 10.3143 S5 aspherical 18.3337 0.4182 1.498 81.56 -98.0000 S6 aspherical 500.0000 0.3007 -98.0000 S7 aspherical 15.9748 0.3639 1.677 19.24 96.7734 S8 aspherical 6.3198 0.4005 -43.3788 S9 aspherical -730.1232 0.7112 1.814 41.00 -98.0000 S10 aspherical -4.4343 0.7705 -1.5020 S11 aspherical 3.7762 0.5121 1.537 55.71 -8.0799 S12 aspherical 1.4807 0.4755 -6.7091 S13 spherical endless 0.2102 1.517 64.20 S14 spherical endless 0.7204 S15 spherical endless 0

[0128] Table 7

[0129] Table 8 gives the higher-order coefficients of S1-S12 that can be used for each aspherical lens in Example 4. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0130] Face number A4 A6 A8 A10 A12 A14 A16 s1 1.56E-02 -6.99E-03 -6.40E-03 -3.19E-03 -1.30E-03 -4.07E-04 -9.81E-05 s2 -4.74E-02 -1.89E-02 -6.69E-03 -1.67E-03 2.55E-04 4.04E-04 2.38E-04 s3 9.07E-03 1.80E-02 1.92E-03 1.02E-04 1.46E-04 -2.66E-05 2.55E-05 s4 -5.15E-03 3.73E-02 6.96E-03 2.20E-04 -2.09E-03 -1.95E-03 -1.09E-03 s5 -1.21E-01 -5.82E-03 -3.43E-03 -9.43E-03 -1.28E-02 -1.18E-02 -9.15E-03 s6 -2.13E-01 1.66E-02 1.76E-02 7.85E-03 -2.47E-03 -5.24E-03 -5.56E-03 s7 -6.48E-01 -1.50E-02 -3.11E-02 -6.23E-03 -7.58E-04 4.86E-03 4.04E-03 s8 -8.62E-01 1.93E-01 -1.98E-02 -4.75E-03 -1.04E-02 -1.04E-02 -1.72E-02 s9 -9.07E-01 2.58E-01 1.69E-02 -3.00E-02 1.91E-02 5.12E-02 -1.22E-03 s10 1.71E-03 1.06E-01 2.61E-03 6.10E-02 5.57E-03 2.09E-02 2.08E-02 s11 -3.14E+00 1.52E+00 -7.83E-01 2.67E-01 -1.65E-01 1.77E-02 -3.97E-02 s12 -3.08E+00 6.25E-01 -1.55E-01 1.30E-01 -4.87E-02 2.16E-02 -1.66E-02 Face number A18 A20 A22 A24 A26 A28 A30 s1 -6.58E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s2 6.65E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s3 1.35E-05 5.45E-06 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s4 -4.10E-04 -9.59E-05 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s5 -6.02E-03 -3.51E-03 -1.73E-03 -7.34E-04 -2.26E-04 -4.31E-05 8.85E-06 s6 -4.08E-03 -2.48E-03 -1.13E-03 -3.94E-04 -7.16E-05 0.00E+00 0.00E+00 s7 2.39E-03 7.80E-04 2.04E-04 0.00E+00 0.00E+00 0.00E+00 0.00E+00 s8 -1.09E-02 -6.04E-03 -4.30E-03 -3.88E-03 -2.14E-03 -6.75E-04 -6.95E-05 s9 -1.62E-02 -7.04E-05 7.57E-03 2.57E-03 0.00E+00 0.00E+00 0.00E+00 s10 1.80E-02 1.33E-02 1.10E-02 6.44E-03 3.18E-03 1.47E-03 4.52E-04 s11 3.89E-03 -1.57E-02 4.30E-03 -3.43E-03 6.33E-04 1.21E-05 0.00E+00 s12 5.57E-03 -3.63E-03 1.75E-03 -5.70E-04 1.34E-04 -2.70E-04 -1.25E-04

[0131] Table 8

[0132] Figure 23 The on-axis chromatic aberration curve of the imaging lens in Example 4 is shown, which indicates the deflection of the focal point of light of different wavelengths after passing through the imaging lens. Figure 24 The astigmatism curve of the imaging lens in Example 4 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 25 The distortion curve of the imaging lens in Example 4 is shown, which represents the distortion magnitude corresponding to different field of view angles. Figure 26 The magnification chromatic aberration curve of the imaging lens in Example 4 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the imaging lens.

[0133] according to Figures 23 to 26 As can be seen, the imaging lens given in Example 4 can achieve good image quality.

[0134] In summary, Examples 1 to 4 satisfy the relationships shown in Table 9.

[0135]

[0136]

[0137] Table 9

[0138] Table 10 provides some parameters of the imaging lenses for Examples 1 to 4.

[0139] Parameters / Examples 1-1 1-2 2-1 2-2 3-1 3-2 4-1 4-2 d1s 2.972 2.992 2.324 2.351 2.800 2.825 2.666 2.714 d4s 4.740 4.752 4.825 4.825 4.831 4.831 4.839 4.839 D4s 6.697 6.697 6.689 6.697 6.689 6.689 6.697 6.697 D4m 6.697 6.697 6.558 6.697 6.558 6.689 6.627 6.697 d5s 6.778 6.724 6.697 6.697 6.847 6.897 6.843 6.838 d5m 8.153 7.926 8.133 8.001 8.156 8.156 8.153 7.406 D5s 7.563 7.539 7.805 7.673 7.542 7.673 7.539 8.550 d0m 10.273 10.273 10.253 10.138 10.158 10.158 10.158 10.158 D0m 10.638 10.638 10.618 10.618 10.638 10.638 10.638 10.638 CP4 0.134 0.111 0.116 0.094 0.134 0.134 0.134 0.134 EP45 0.606 0.630 0.599 0.618 0.669 0.691 0.606 0.628 CP5 0.290 0.268 0.239 0.216 0.290 0.279 0.290 0.240 D4bs 7.997 7.997 7.997 7.997 7.997 7.997 7.997 7.997 CP4b 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 D5bs 9.511 9.491 9.511 9.511 9.511 9.511 9.511 9.511 L 5.638 5.638 5.638 5.638 5.638 5.638 5.638 5.638 d0smin 3.137 3.199 2.117 2.117 3.096 3.096 2.137 2.137

[0140] Table 10

[0141] It should be noted that in Tables 9 and 10, 1-1 represents the imaging lens in Example 1 in the first state, 1-2 represents the imaging lens in Example 1 in the second state, 2-1 represents the imaging lens in Example 2 in the first state, 2-2 represents the imaging lens in Example 2 in the second state, 3-1 represents the imaging lens in Example 3 in the first state, 3-2 represents the imaging lens in Example 3 in the second state, 4-1 represents the imaging lens in Example 4 in the first state, and 4-2 represents the imaging lens in Example 4 in the second state.

[0142] Table 11 gives the effective focal lengths f1 to f6 of the first to sixth lenses of the imaging lenses in Examples 1 to 4, as well as the effective focal length f, half of the maximum field of view (Semi-FOV), and aperture number FNO of the imaging lenses.

[0143]

[0144]

[0145] Table 11

[0146] 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 imaging lens described above.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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 imaging lens, characterized in that, The imaging lens has six lenses with optical power, comprising: Six lenses sequentially comprising a first lens to a sixth lens from an object side to an image side of the imaging lens, the fourth lens having at least one inflection point on an object side face and an image side face respectively, the sixth lens having at least one inflection point on an object side face and an image side face respectively, an average of Abbe numbers of the fourth lens and the fifth lens being less than 32, the first lens having positive optical power, the object side face of the first lens being convex, the image side face of the first lens being concave, the second lens having negative optical power, the object side face of the second lens being convex, the image side face of the second lens being concave, the third lens having positive optical power, the fourth lens having negative optical power, the object side face of the fourth lens being convex, the image side face of the fourth lens being concave, the fifth lens having positive optical power, the image side face of the fifth lens being convex, the sixth lens having negative optical power, the object side face of the sixth lens being convex, the image side face of the sixth lens being concave; A plurality of abutting members, the fourth abutting member being located on the image side of the fourth lens and at least partially in contact with the image side face of the fourth lens, the fifth abutting member being located on the image side of the fifth lens and at least partially in contact with the image side face of the fifth lens; A lens barrel for accommodating the lenses and the abutting members; Wherein the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the interval EP45 of the fourth abutting member and the fifth abutting member along the optical axis direction of the imaging lens satisfy: 1.04mm≤(N4+N5) / 2*EP45≤1.21 mm; The combined focal length f45 of the fourth lens and the fifth lens, the maximum thickness CP4 of the fourth abutting member along the optical axis direction, and the maximum thickness CP5 of the fifth abutting member along the optical axis direction satisfy: 18.66≤f45 / (CP4+CP5)≤29.70; The inner diameter d5m of the image side face of the fifth abutting member, the curvature radius R10 of the image side face of the fifth lens, and the curvature radius R11 of the object side face of the sixth lens satisfy: -19.33≤d5m / (R10+R11)≤-5.75; The curvature radius R8 of the image side face of the fourth lens, the curvature radius R7 of the object side face of the fourth lens, and the inner diameter d4s of the object side face of the fourth abutting member satisfy: 3.65≤(R8+R7) / d4s≤7.

74.

2. The imaging lens according to claim 1, characterized in that, The maximum thickness of the fourth abutting member along the optical axis direction and the maximum thickness of the fifth abutting member along the optical axis direction are both greater than 0.05mm.

3. The imaging lens according to claim 1, characterized in that, The inner diameter d4s of the object side face of the fourth abutting member, the maximum thickness CP4 of the fourth abutting member along the optical axis direction, the curvature radius R8 of the image side face of the fourth lens, and the curvature radius R7 of the object side face of the fourth lens satisfy: 11.14≤(d4s / CP4) / (R7 / R8)≤20,81.

4. The imaging lens according to claim 1, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

5. The imaging lens according to claim 1, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

6. The imaging lens according to claim 1, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

7. The imaging lens according to claim 1, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

8. The imaging lens according to claim 7, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

9. The imaging lens according to claim 7, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

10. The imaging lens according to any one of claims 1 to 9, characterized in that, An Abbe number V5 of the fifth lens, an Abbe number V4 of the fourth lens, an effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, and a distance EP45 between the fourth support member and the fifth support member in the direction of the optical axis satisfy: -1.35 ≤ (V5-V4) / (f4+f5)*EP45 ≤ -0.

96.

11. The imaging lens according to any one of claims 1 to 9, characterized in that, At least one of the plurality of the abutting members comprises a first abutting member located on the image side of the first lens and at least partially in contact with the image side surface of the first lens, and the inner diameter d1s of the object side surface of the first abutting member, the central thickness CT1 of the first lens, and the refractive index N1 of the first lens satisfy the following relationship: 4.41≤d1s / CT1*N1≤5.

10.

12. The imaging lens according to any one of claims 1 to 9, characterized in that, The maximum height L of the lens barrel along the optical axis direction, the sum ∑CT of the central thicknesses of all the lenses, and the F-number FNO of the imaging lens satisfy the following relationship: 2.96≤L / ∑CT*FNO≤3.

78.

13. The imaging lens according to any one of claims 1 to 9, characterized in that, The outer diameter D0m of the image-side end surface of the lens barrel, the inner diameter d0m of the image-side end surface of the lens barrel satisfy: 23.96 mm 2 ≤ π * (D0m 2 - d0m 2 ) ≤ 31.35 mm 2 .

14. The imaging lens according to any one of claims 1 to 9, characterized in that, The inner diameter d5s of the object side surface of the fifth abutting member, the distance Yc62 from the optical axis to the inflection point on the image side surface of the sixth lens closest to the optical axis, and the distance Yc61 from the optical axis to the inflection point on the object side surface of the sixth lens closest to the optical axis satisfy the following relationship: 6.80≤d5s / (Yc62-Yc61)≤7.

56.

15. The imaging lens according to any one of claims 1 to 9, characterized in that, The inner diameter d5s of the object side surface of the fifth abutting member, the radius of curvature R10 of the image side surface of the fifth lens, and the radius of curvature R11 of the object side surface of the sixth lens satisfy the following relationship: -16.07≤d5s / (R10+R11)≤-4.83.

Images