Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens group, a spacer element group and a lens barrel. The lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from an object side to an image side along an optical axis. The spacer element group comprises a third spacer element arranged on the image side of the third lens, a fourth spacer element arranged on the image side of the fourth lens and a fifth spacer element arranged on the image side of the fifth lens. The lens group and the spacer element group are accommodated in the lens barrel. The center thickness CT4 of the fourth lens on the optical axis, the interval EP34 of the third spacer element and the fourth spacer element along the optical axis, the inner diameter d5s of the object side surface of the fifth spacer element, the outer diameter D5s of the object side surface of the fifth spacer element and the effective focal length f5 of the fifth lens satisfy the following conditions: 1.2 < CT4 / EP34 < 1.7, and |(D5s-d5s) / f5|≤0.3.

Description

Technical Field

[0001] This application relates to the field of optical devices, and particularly to a six-piece optical imaging lens. Background Art

[0002] With the rapid development of optoelectronic technology, the application fields of optical imaging lenses are becoming more and more extensive, gradually penetrating from traditional electronic product fields such as mobile phones and tablet computers to fields such as security video surveillance and wearable display devices. With the diversification of application scenarios, higher requirements are put forward for the structural stability and optical performance of optical imaging lenses in many application fields. In view of different application scenarios, it is particularly important to ensure the stability of the internal structure of the optical imaging lens while ensuring good performance of the optical imaging lens.

[0003] For a six-piece optical imaging lens, when the central thickness of the fourth lens is greater than the distance between the object-side spacer element and the image-side spacer element of the fourth lens, the fourth lens may be deformed due to insufficient support force in the optical axis direction, which is not conducive to the structural stability of the lens, and further affects the imaging clarity of the lens, resulting in failure to meet the requirements for optical imaging lenses in diverse application scenarios. Summary of the Invention

[0004] This application provides an optical imaging lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] On the one hand, this application provides an optical imaging lens, which includes a lens group, a spacer element group, and a lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The spacer element group includes a third spacer element disposed on the image side of the third lens, a fourth spacer element disposed on the image side of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens. The lens group and the spacer element group are accommodated in the lens barrel. Among them, the central thickness CT4 of the fourth lens on the optical axis, the interval EP34 between the third spacer element and the fourth spacer element along the optical axis, the inner diameter d5s of the object side surface of the fifth spacer element, the outer diameter D5s of the object side surface of the fifth spacer element, and the effective focal length f5 of the fifth lens satisfy: 1.2 < CT4 / EP34 < 1.7, and |(D5s - d5s) / f5| ≤ 0.3.

[0006] For a six-element optical imaging lens where the center thickness of the fourth lens is greater than the distance between the third and fourth spacers along the optical axis, configuring the distance between the third and fourth spacers along the optical axis to be slightly smaller than the center thickness of the fourth lens can advantageously improve the support strength of the fourth lens edge in the optical axis direction, avoiding excessive deformation of the fourth lens during reliability testing. Furthermore, considering that the focal length of the fifth lens is typically large, controlling the difference between the inner and outer diameters of the fifth spacer within a reasonable range can minimize the problem of excessive deformation of the fifth spacer caused by high temperature and humidity environments. Therefore, the optical imaging lens provided in this application, by reasonably controlling the relationship between the center thickness CT4 of the fourth lens along the optical axis, the distance EP34 between the third and fourth spacers along the optical axis, the inner diameter d5s of the object-side surface of the fifth spacer, the outer diameter D5s of the object-side surface of the fifth spacer, and the effective focal length f5 of the fifth lens, advantageously controls the deformation of the fourth lens and the fifth spacer within an acceptable range, thereby improving the structural stability of the optical imaging lens.

[0007] This application also provides an optical imaging lens, which includes a lens group, a spacer element group, and a lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. The spacer element group includes a fifth spacer element disposed on the image side of the fifth lens. The lens group and the spacer element group are housed in the lens barrel. The effective focal length f5 of the fifth lens, the outer diameter D0m of the image side end face of the lens barrel, and the inner diameter d5m of the image side face of the fifth spacer element satisfy: 0.5 < |f5| / (D0m-d5m) < 3.0.

[0008] According to another aspect of this application, the optical imaging lens can effectively control the focal length of the fifth lens and the distribution of the aperture of the spacer element on the object side of the fifth lens and the aperture of the lens barrel end face by configuring the ratio coefficient of the effective focal length of the fifth lens to the difference between the outer diameter of the image side end face of the lens barrel and the inner diameter of the image side end face of the fifth spacer element. This makes the structure more stable and can better control the focusing accuracy and the image clarity.

[0009] According to an exemplary embodiment of this application, the spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens. The effective focal length f4 of the fourth lens, the radius of curvature R4 of the image side of the second lens, the inner diameter d4s of the object side of the fourth spacer element, and the outer diameter D4s of the object side of the fourth spacer element satisfy: 1.0 <f4 / D4s+|R4 / d4s|<4.0。

[0010] According to an exemplary embodiment of this application, the spacer element group further includes a second spacer element disposed on the image side of the second lens, wherein the radius of curvature R3 of the object side of the second lens, the center thickness CT2 of the second lens on the optical axis, the inner diameter d2s of the object side of the second spacer element, and the inner diameter d2m of the image side of the second spacer element satisfy the following:

[0011] 3.5 <R3 / d2s+d2m / CT2<4.5。

[0012] According to an exemplary embodiment of this application, the effective focal length f1 of the first lens, the outer diameter D0s of the object-side end face of the lens barrel, and the inner diameter d0s of the object-side end face of the lens barrel satisfy: -10 <f1 / (D0s-d0s)<-2.0。

[0013] According to an exemplary embodiment of this application, the spacer element group further includes a third spacer element disposed on the image side of the third lens, wherein the effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R7 of the object side surface of the fourth lens, and the outer diameter D3s of the object side surface of the third spacer element satisfy: 4 <f1 / R1+R7 / D3s<6.5。

[0014] According to an exemplary embodiment of this application, the spacer element group further includes a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R5 of the object side of the third lens, the radius of curvature R7 of the object side of the fourth lens, the inner diameter d3s of the object side of the third spacer element and the inner diameter d4m of the image side of the fourth spacer element satisfy: 2.5 < |R5 + R7| / (d3s + d4m) < 4.5.

[0015] According to an exemplary embodiment of this application, the spacer element group further includes a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, the outer diameter D4m of the image side of the fourth spacer element, and the inner diameter d3m of the image side of the third spacer element satisfy: 2.0 < (R3-R4) / (D4m-d3m) < 4.0.

[0016] According to an exemplary embodiment of this application, the spacer element group further includes a second spacer element disposed on the image side of the second lens and a third spacer element disposed on the image side of the third lens. The spacing EP23 between the second spacer element and the third spacer element along the optical axis, the radius of curvature R4 of the image side of the second lens and the radius of curvature R5 of the object side of the third lens satisfy: EP23 / |R5-R4|<0.1.

[0017] According to an exemplary embodiment of this application, the spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens. The inner diameter d5s of the object side of the fifth spacer element, the spacing EP45 between the fourth and fifth spacer elements along the optical axis, the inner diameter d5m of the image side of the fifth spacer element, and the maximum thickness CP5 of the fifth spacer element satisfy: 11 <d5s / EP45+d5m / CP5<19。

[0018] According to an exemplary embodiment of this application, both the object-side surface and the image-side surface of the second lens are convex.

[0019] According to an exemplary embodiment of this application, both the object-side surface and the image-side surface of the fourth lens are convex.

[0020] According to an exemplary embodiment of this application, the lens group has the largest absolute value of its focal length.

[0021] The inner diameter d0s of the object-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: (d0m-d0s) / |fmax|<0.2.

[0022] According to an exemplary embodiment of this application, the minimum of the following: the maximum height L of the lens barrel along the optical axis, the sum of the center thicknesses of each lens in the lens group ∑CT along the optical axis, and the absolute value of the focal length of each lens in the lens group, |fmin|, satisfies: 4.0 mm. <L / ∑CT*|fmin|<5.5mm。

[0023] According to an exemplary embodiment of this application, an optical element is provided between the first lens and the second lens. The optical element may be one of a cover glass, a filter assembly, or an autofocus assembly.

[0024] According to an exemplary embodiment of this application, the lens barrel includes a first lens barrel component and a second lens barrel component, a first lens is housed in the first lens barrel component, and optical elements and a second to a sixth lens are housed in the second lens barrel component.

[0025] This application also provides an optical imaging lens, which includes a lens group, a spacer element group, and a lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. The spacer element group includes a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The lens group and the spacer element group are housed in the lens barrel. The radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, the outer diameter D4m of the image side of the fourth spacer element, and the inner diameter d3m of the image side of the third spacer element satisfy: 2.0 < (R3 - R4) / (D4m - d3m) < 4.0.

[0026] According to another aspect of the optical imaging lens provided in this application, by reasonably controlling the ratio of the difference in curvature radius between the object side and the image side of the second lens to the difference between the outer diameter of the image side of the fourth spacer element and the inner diameter of the image side of the third spacer element, the curvature radius R3 of the object side of the second lens, the curvature radius R4 of the image side of the second lens, the outer diameter D4m of the image side of the fourth spacer element, and the inner diameter d3m of the image side of the third spacer element satisfy 2.0 < (R3 - R4) / (D4m - d3m) < 4.0, the shape range of the second lens is effectively controlled, and the stability of the optical distribution is increased. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of an optical imaging lens according to this application is shown;

[0029] Figure 2 A schematic diagram of the structure of an optical imaging lens according to Embodiment 1 of this application is shown;

[0030] Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown;

[0031] Figure 4 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown;

[0032] Figures 5A to 5C The on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves of the optical imaging lenses according to embodiments 1-3 of this application are shown respectively.

[0033] Figure 6 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0034] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0035] Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0036] Figures 9A to 9C The on-axis chromatic aberration curves, astigmatism curves, and magnification chromatic aberration curves of the optical imaging lenses according to embodiments 4-6 of this application are shown respectively.

[0037] Figure 10 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0038] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0039] Figure 12 A schematic diagram of the structure of an optical imaging lens according to Embodiment 9 of this application is shown; and

[0040] Figures 13A to 13C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lenses according to embodiments 7-9 of this application are shown respectively. Detailed Implementation

[0041] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0042] 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.

[0043] 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.

[0044] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0045] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising" as used in this specification indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0046] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] The features, principles and other aspects of this application are described in detail below.

[0049] Figure 1 A structural layout diagram and schematic diagram of some parameters of an optical imaging lens according to an exemplary embodiment of this application are shown. Figure 1 Only a few parameters of the lens barrel and spacer elements of the optical imaging lens of this application are shown as examples to facilitate a better understanding of this application. Figure 1 As shown, d2s represents the inner diameter of the object-side surface of the second spacer element, d2m represents the inner diameter of the image-side surface of the second spacer element, d3s represents the inner diameter of the object-side surface of the third spacer element, d3m represents the inner diameter of the image-side surface of the third spacer element, D3s represents the outer diameter of the object-side surface of the third spacer element, D4s represents the outer diameter of the object-side surface of the fourth spacer element, d4s represents the inner diameter of the object-side surface of the fourth spacer element, D4m represents the outer diameter of the image-side surface of the fourth spacer element, d4m represents the inner diameter of the image-side surface of the fourth spacer element, and d5s represents the fifth spacer element. The inner diameter of the object-side end face of the lens barrel is d5m, which represents the inner diameter of the image-side end face of the fifth spacer element. EP23 represents the spacing between the second and third spacer elements along the optical axis. EP34 represents the spacing between the third and fourth spacer elements along the optical axis. EP45 represents the spacing between the fourth and fifth spacer elements along the optical axis. L represents the length of the lens barrel in the optical axis direction. D0s represents the outer diameter of the object-side end face of the lens barrel. d0s represents the inner diameter of the object-side end face of the lens barrel. D0m represents the outer diameter of the image-side end face of the lens barrel. d0m represents the inner diameter of the image-side end face of the lens barrel.

[0050] like Figures 2 to 4 , Figures 6 to 8 as well as Figures 10 to 12As shown, an optical imaging lens according to an exemplary embodiment of the present application may include a lens group, a spacer element group, and a lens barrel. The lens group is a six-piece lens group, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The spacer element group includes at least one spacer element, which is disposed between adjacent lenses, for example, to support the lenses and block stray light. The lens barrel is used to accommodate the lens group and the spacer element group.

[0051] In an exemplary embodiment, the lens barrel may be a split lens barrel and include a first lens barrel component and a second lens barrel component. As an example, the first lens may be accommodated in the first lens barrel component, while the second lens to the sixth lens may be accommodated in the second lens barrel component. By such an arrangement, it is beneficial to adjust the position of the first lens relative to the second lens to the sixth lens during the lens assembly process. The second lens barrel component has an outer ring surface and an inner ring surface, and the inner ring surface may be stepped.

[0052] In an exemplary embodiment, an optical element may be provided between the first lens and the second lens, and the optical element may be one of a cover glass, a filter assembly, or an autofocus assembly. As an example, the optical element may be disposed in the second lens barrel component of the lens barrel.

[0053] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens, a fourth spacer element disposed on the image side of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens. The central thickness CT4 of the fourth lens on the optical axis, the interval EP34 between the third spacer element and the fourth spacer element along the optical axis, the effective focal length f5 of the fifth lens, the inner diameter d5s of the object side surface of the fifth spacer element, and the outer diameter D5s of the object side surface of the fifth spacer element P5 may satisfy: 1.2 < CT4 / EP34 < 1.7, and |(D5s - d5s) / f5| ≤ 0.3. By reasonably controlling the relationship between CT4, EP34, d5s, D5s, and f5, the deformation of the fourth lens and the fifth spacer element is advantageously controlled within an acceptable range, thereby improving the structural stability of the optical imaging lens.

[0054] In an exemplary embodiment, the spacer element group may include a fifth spacer element disposed on the image side of the fifth lens. The effective focal length f5 of the fifth lens, the outer diameter D0m of the image side end surface of the lens barrel, and the inner diameter d5m of the image side surface of the fifth spacer element may satisfy: 0.5 < |f5| / (D0m - d5m) < 3.0. By configuring the proportional coefficient of the effective focal length of the fifth lens to the difference between the outer diameter of the image side end surface of the lens barrel and the inner diameter of the image side surface of the fifth spacer element, the focal length of the fifth lens and the aperture distribution of the spacer element disposed on the object side surface of the fifth lens and the aperture of the lens barrel end surface can be effectively controlled, making the structure more stable and better controlling the focusing accuracy and image clarity.

[0055] In an exemplary embodiment, the spacer element group may include a fourth spacer element disposed on the image side of the fourth lens. The effective focal length f4 of the fourth lens, the radius of curvature R4 of the image side surface of the second lens, the inner diameter d4s of the object side surface of the fourth spacer element P4, and the outer diameter D4s of the object side surface of the fourth spacer element P4 may satisfy: 1.0 < f4 / D4s + |R4 / d4s| < 4.0. By controlling the sum of the ratio of the effective focal length of the fourth lens to the outer diameter of the object side surface of the fourth spacer element and the ratio of the radius of curvature of the image side surface of the fourth lens to the inner diameter of the image side surface of the fourth spacer element, the shape and sensitivity of the fourth lens can be better controlled, and the rationality of the overall lens group arrangement can be improved.

[0056] In an exemplary embodiment, the spacer element group includes a second spacer element disposed on the image side of the second lens. The radius of curvature R3 of the object side surface of the second lens, the central thickness CT2 of the second lens on the optical axis, the inner diameter d2s of the object side surface of the second spacer element, and the inner diameter d2m of the image side surface of the second spacer element may satisfy: 3.5 < R3 / d2s + d2m / CT2 < 4.5. By controlling the sum of the ratio of the radius of curvature of the object side surface of the second lens to the inner diameter of the object side surface of the second spacer element and the ratio of the inner diameter of the image side surface of the second spacer element to the central thickness of the second lens, the shape and sensitivity of the second lens can be better controlled, and the rationality of the overall lens group arrangement can be improved.

[0057] In an exemplary embodiment, the effective focal length f1 of the first lens, the outer diameter D0s of the object side end surface of the lens barrel, and the inner diameter d0s of the object side end surface of the lens barrel may satisfy: -10 < f1 / (D0s - d0s) < -2.0. By controlling the ratio of the effective focal length of the first lens to the difference between the outer and inner diameters of the object side end surface of the lens barrel, the size of the first lens can be better controlled, and the compactness of the lens can be improved.

[0058] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens. The effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R7 of the object side surface of the fourth lens, and the outer diameter D3s of the object side surface of the third spacer element may satisfy: 4 < f1 / R1 + R7 / D3s < 6.5. By controlling the sum of the ratio of the focal length of the first lens to the radius of curvature of its object side surface and the ratio of the radius of curvature of the object side surface of the fourth lens to the outer diameter of the object side surface of the third spacer element, a more reasonable optical layout can be achieved, and the compactness of the optical imaging lens can be improved.

[0059] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R5 of the object side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, the inner diameter d3s of the object side surface of the third spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element may satisfy: 2.5 < |R5 + R7| / (d3s + d4m) < 4.5. By controlling the ratio of the absolute value of the sum of the radii of curvature of the object side surfaces of the third lens and the fourth lens to the sum of the inner diameter of the object side surface of the third spacer element and the inner diameter of the image side surface of the fourth spacer element, the compactness between the third lens and the fourth lens is improved, and the stability of the lens is increased.

[0060] In an exemplary embodiment, the spacer element group may include a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d3m of the image side surface of the third spacer element may satisfy: 2.0 < (R3 - R4) / (D4m - d3m) < 4.0. By controlling the ratio of the difference in the radii of curvature between the object side surface and the image side surface of the second lens to the difference between the outer diameter of the image side surface of the fourth spacer element and the inner diameter of the image side surface of the third spacer element, the shape range of the second lens is controlled, and the stability of the optical distribution is increased.

[0061] In an exemplary embodiment, the spacer element group may include a second spacer element disposed on the image side of the second lens and a third spacer element disposed on the image side of the third lens. The spacing EP23 between the second spacer element and the third spacer element along the optical axis, the radius of curvature R4 of the image side surface of the second lens, and the radius of curvature R5 of the object side surface of the third lens may satisfy: EP23 / |R5 - R4| < 0.1. By controlling the ratio of the difference in the radius of curvature of the object side surface of the third lens and the radius of curvature of the image side surface of the second lens to the distance between the second spacer element and the third spacer element, the rationality and compactness of the optical layout are increased.

[0062] In an exemplary embodiment, the spacer element group may include a fourth spacer element disposed on the image side of the fourth lens and a fifth spacer element disposed on the image side of the fifth lens. The inner diameter d5s of the object side surface of the fifth spacer element, the spacing EP45 between the fourth spacer element and the fifth spacer element along the optical axis, the inner diameter d5m of the image side surface of the fifth spacer element, and the maximum thickness CP5 of the fifth spacer element may satisfy: 11 < d5s / EP45 + d5m / CP5 < 19. By controlling the distance between the fourth spacer element and the fifth spacer element and the inner diameters on the object and image sides of the fifth spacer element, the position distribution of the fourth lens and the fifth lens is controlled, and the stability of the lens structure is improved.

[0063] In an exemplary embodiment, both the object side and the image side of the second lens are convex surfaces. Setting the second lens as a biconvex lens is beneficial for controlling the light path and improving the optical performance of the lens.

[0064] In an exemplary embodiment, both the object side and the image side of the fourth lens are convex surfaces. Setting the fourth lens as a biconvex lens is beneficial for controlling the light path and improving the optical performance of the lens.

[0065] In an exemplary embodiment, the maximum value |fmax| among the absolute values of the focal lengths of the respective lenses of the lens group, the inner diameter d0s of the object-side end face of the lens barrel, and the inner diameter d0m of the image-side end face of the lens barrel may satisfy: (d0m - d0s) / |fmax| < 0.2. By controlling the distribution of the focal lengths and the ratio of the inner diameters on both sides of the lens barrel during the overall optical design, the balance between the optical distribution and the lens barrel structure design can be effectively controlled, improving the stability of the lens. As an example, 0 < (d0m - d0s) / |fmax| < 0.2.

[0066] In an exemplary embodiment, the maximum height L of the lens barrel in the optical axis direction, the sum ∑CT of the central thicknesses of the respective lenses of the lens group on the optical axis, and the minimum value |fmin| among the absolute values of the focal lengths of the respective lenses of the lens group may satisfy: 4.0 mm < L / ∑CT * |fmin| < 5.5 mm. By controlling the ratio of the lens barrel height dimension to the sum of the thicknesses of all the lenses, the rationality of the lens barrel structure and the optical distribution is improved, increasing the stability of the lens.

[0067] The optical imaging lens according to the above embodiments of the present application may employ six lenses and at least one spacer element. Through the reasonable parameter allocation described in the above aspects, on the one hand, the compactness between the lenses of the optical imaging lens can be improved, and on the other hand, the balance between the optical layout and the lens barrel structure design can be controlled, making the overall arrangement of the optical imaging lens more reasonable, thereby improving the stability of the optical imaging lens, making the focusing accuracy of the optical imaging lens higher, and the imaging quality better. However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses and spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0068] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings.

[0069] The following refers to Figures 2 to 5C Describe the optical imaging lens according to Embodiments 1-3 of the present application.

[0070] Example 1

[0071] Figure 2A schematic diagram of the structure of an optical imaging lens 110 according to Embodiment 1 of this application is shown.

[0072] like Figure 2 As shown, the optical imaging lens 110 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a cover glass, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the cover glass and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0073] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0074] The aperture stop STO (not shown) can be set between, for example, the second lens E2 and the third lens E3, as needed.

[0075] Table 1 shows the basic parameters of the lens group in the optical imaging lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0076]

[0077]

[0078] Table 1

[0079] In Example 1, the aperture number Fno of the optical imaging lens is 2.22, and the object-side and image-side surfaces of any one of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are aspherical.

[0080] Table 2 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for each aspherical mirror S1-S12 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 and A 28 .

[0081]

[0082] Table 2

[0083] Table 3 lists some basic parameters of the lens barrel and spacer elements of the optical imaging lens 110 in Example 1, such as d2s, d2m, d3s, d3m, D3s, d4s, d4m, D4s, D4m, d5s, d5m, D5s, d0s, d0m, D0s, D0m, EP23, EP34, EP45, CP5, and L. Some of the basic parameters listed in Table 3 are based on... Figure 1 The measurements were obtained using the annotation method shown, and the units of the basic parameters listed in Table 3 are all millimeters (mm).

[0084] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 1 1.42 1.43 1.38 1.38 2.38 1.74 1.74 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 1 3.04 3.04 2.56 2.82 3.48 2.99 4.42 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 1 3.53 6.57 0.40 0.35 0.56 0.32 5.58

[0085] Table 3

[0086] Example 2

[0087] Figure 3 A schematic diagram of the structure of an optical imaging lens 120 according to Embodiment 2 of this application is shown.

[0088] like Figure 3As shown, the optical imaging lens 120 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a cover glass, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the cover glass and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0089] The optical imaging lens 120 in Embodiment 2 has the same lens group as the optical imaging lens 110 in Embodiment 1. That is, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 120 of this embodiment are the same as those in Tables 1 and 2, respectively. The difference between this embodiment and Embodiment 1 is that the structural dimensions of the included lens barrel and spacer element are different. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 120 in Embodiment 2 are listed in Table 4 below, and the unit of the basic parameters listed in Table 4 is millimeters (mm).

[0090] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 2 1.47 1.43 1.38 1.38 2.51 1.74 1.74 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 2 3.04 3.04 2.56 2.28 3.48 3.09 4.42 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 2 3.53 6.70 0.39 0.34 0.56 0.32 5.58

[0091] Table 4

[0092] Example 3

[0093] Figure 4 A schematic diagram of the structure of an optical imaging lens 130 according to Embodiment 3 of this application is shown.

[0094] like Figure 4As shown, the optical imaging lens 130 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a cover glass, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the cover glass and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0095] The optical imaging lens 130 in Embodiment 3 has the same lens group as the optical imaging lens 110 in Embodiment 1. That is, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 130 of this embodiment are the same as those in Tables 1 and 2, respectively. The difference between this embodiment and Embodiment 1 is that the structural dimensions of the included lens barrel and spacer element are different. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 130 in Embodiment 3 are listed in Table 5 below, and the unit of the basic parameters listed in Table 5 is millimeters (mm).

[0096] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 3 1.42 1.43 1.38 1.38 2.38 1.74 1.74 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 3 3.04 3.04 2.61 2.87 3.48 3.26 4.49 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 3 4.42 6.17 0.40 0.35 0.56 0.32 5.58

[0097] Table 5

[0098] Figure 5A The on-axis chromatic aberration curves of the optical imaging lenses 110, 120, and 130 of Embodiments 1-3 are shown, which indicate the deflection of the focal point of light of different wavelengths through the optical imaging lenses 110, 120, and 130. Figure 9B The astigmatism curves of optical imaging lenses 110, 120, and 130 of Examples 1-3 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 9C The magnification chromatic aberration curves of optical imaging lenses 110, 120, and 130 of Examples 1-3 are shown, representing the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 9A to 9C It can be seen that the optical imaging lenses 110, 120, and 130 given in Examples 1-3 can achieve good imaging quality.

[0099] The following is for reference Figures 6 to 9C The optical imaging lenses according to embodiments 4-6 of this application are described.

[0100] Example 4

[0101] Figure 6 A schematic diagram of the structure of an optical imaging lens 210 according to Embodiment 4 of this application is shown.

[0102] like Figure 6 As shown, the optical imaging lens 210 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a filter element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the filter element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0103] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0104] An aperture stop STO (not shown) can be positioned, for example, between the first lens E1 and the second lens E2, as needed.

[0105] Table 6 shows the basic parameters of the lens group in the optical imaging lens of Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0106]

[0107] Table 6

[0108] In Example 4, the aperture number Fno of the optical imaging lens is 2.22, and the object-side and image-side surfaces of any one of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are aspherical.

[0109] Table 7 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for each aspherical mirror S1-S12 in Example 4. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 and A 26 .

[0110]

[0111]

[0112] Table 7

[0113] Table 8 lists some basic parameters of the lens barrel and spacer elements of the optical imaging lens 210 in Example 4, such as d2s, d2m, d3s, d3m, D3s, d4s, d4m, D4s, D4m, d5s, d5m, D5s, d0s, d0m, D0s, D0m, EP23, EP34, EP45, CP5, and L. Some of the basic parameters listed in Table 8 are based on... Figure 1 The measurements were obtained using the annotation method shown, and the units of the basic parameters listed in Table 8 are all millimeters (mm).

[0114] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 4 1.33 1.33 1.63 1.63 3.10 2.12 2.14 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 4 3.15 3.15 2.97 3.11 3.57 3.13 4.49 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 4 5.07 6.57 0.49 0.44 0.62 0.23 5.16

[0115] Table 8

[0116] Example 5

[0117] Figure 7 A schematic diagram of the structure of an optical imaging lens 220 according to Embodiment 5 of this application is shown.

[0118] like Figure 7As shown, the optical imaging lens 220 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a filter element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the filter element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0119] The optical imaging lens 220 in Embodiment 5 has the same lens group as the optical imaging lens 210 in Embodiment 4. That is, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 220 of this embodiment are the same as those in Tables 6 and 7, respectively. The difference between this embodiment and Embodiment 4 is that the structural dimensions of the included lens barrel and spacer element are different. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 220 in Embodiment 5 are listed in Table 9 below, and the unit of the basic parameters listed in Table 9 is millimeters (mm).

[0120] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 5 1.33 1.33 1.70 1.70 3.10 2.23 2.25 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 5 3.09 3.10 2.94 3.15 3.57 3.13 4.49 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 5 5.06 6.47 0.48 0.44 0.62 0.23 5.26

[0121] Table 9

[0122] Example 6

[0123] Figure 8 A schematic diagram of the structure of an optical imaging lens 230 according to Embodiment 6 of this application is shown.

[0124] like Figure 8As shown, the optical imaging lens 230 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as a filter element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the filter element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0125] The optical imaging lens 230 in Embodiment 6 has the same lens group as the optical imaging lens 210 in Embodiment 4. That is, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 230 of this embodiment are the same as those in Tables 6 and 7, respectively. The difference between this embodiment and Embodiment 4 is that the structural dimensions of the included lens barrel and spacer element are different. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 230 in Embodiment 6 are listed in Table 10 below, and the unit of the basic parameters listed in Table 10 is millimeters (mm).

[0126]

[0127]

[0128] Table 10

[0129] Figure 9A The on-axis chromatic aberration curves of the optical imaging lenses 210, 220 and 230 of Embodiments 4-6 are shown, which indicate the deflection of the focal point after light of different wavelengths passes through the optical imaging lenses 210, 220 and 230. Figure 9B The astigmatism curves of optical imaging lenses 210, 220 and 230 of Examples 4-6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 9C The magnification chromatic aberration curves of the optical imaging lenses 210, 220, and 230 of Examples 4-6 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to Figures 9A to 9C It can be seen that the optical imaging lenses 210, 220 and 230 given in Examples 4-6 can achieve good imaging quality.

[0130] The following is for reference Figures 10 to 13C The optical imaging lens according to embodiments 7-9 of this application is described.

[0131] Example 7

[0132] Figure 10 A schematic diagram of the structure of an optical imaging lens 310 according to Embodiment 7 of this application is shown.

[0133] like Figure 10 As shown, the optical imaging lens 310 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as an autofocus element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the autofocus element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0134] The first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave.

[0135] An aperture stop STO (not shown) can be positioned, for example, between the first lens E1 and the second lens E2, as needed.

[0136] Table 11 shows the basic parameters of the lens group in the optical imaging lens of Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0137]

[0138]

[0139] Table 11

[0140] In Example 7, the aperture number Fno of the optical imaging lens is 2.22, and the object-side and image-side surfaces of any one of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are aspherical.

[0141] Table 12 lists the higher-order coefficients A4, A6, A8, and A12 that can be used for each aspherical mirror S1-S12 in Example 7. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 and A 26 .

[0142] Face number A4 A6 A8 A10 A12 A14 S1 3.44E-01 -5.70E-02 9.86E-03 -1.50E-03 4.86E-04 -9.19E-05 S2 3.53E-01 -1.44E-02 4.06E-03 -2.16E-04 4.69E-04 1.11E-04 S3 1.00E-02 -1.46E-03 -2.68E-04 -4.93E-05 -9.00E-06 -5.15E-06 S4 -2.52E-02 -5.28E-03 -9.01E-04 6.29E-05 -1.15E-04 5.01E-05 S5 -6.11E-02 -3.57E-03 2.60E-04 3.76E-04 -6.50E-05 5.34E-05 S6 -2.27E-02 2.27E-03 7.64E-04 4.08E-04 -1.59E-04 5.04E-06 S7 -6.79E-02 4.08E-03 1.68E-03 7.54E-04 -4.13E-04 -1.84E-04 S8 1.97E-02 7.06E-03 6.47E-03 2.93E-03 -1.58E-04 -2.77E-04 S9 3.37E-02 -2.84E-02 2.78E-03 3.06E-03 -1.66E-03 4.02E-04 S10 1.73E-01 -2.07E-02 -6.16E-03 5.12E-03 -6.22E-03 3.69E-03 S11 -7.65E-01 1.81E-01 -2.03E-02 -5.58E-03 -1.81E-03 2.23E-03 S12 -8.58E-01 9.80E-02 -1.77E-02 8.32E-03 -4.22E-03 4.40E-04 Face number A16 A18 A20 A22 A24 A26 S1 1.64E-05 -2.79E-06 5.79E-07 0.00E+00 0.00E+00 0.00E+00 S2 7.35E-05 2.36E-05 8.38E-06 0.00E+00 0.00E+00 0.00E+00 S3 1.10E-06 -1.51E-06 3.54E-06 0.00E+00 0.00E+00 0.00E+00 S4 -1.97E-05 1.04E-06 -1.15E-05 0.00E+00 0.00E+00 0.00E+00 S5 -2.93E-05 -3.64E-06 -1.18E-05 0.00E+00 0.00E+00 0.00E+00 S6 -1.83E-05 -1.11E-05 -3.32E-06 0.00E+00 0.00E+00 0.00E+00 S7 -3.67E-05 1.57E-05 -6.94E-07 0.00E+00 0.00E+00 0.00E+00 S8 -1.02E-04 -2.92E-05 1.29E-05 0.00E+00 0.00E+00 0.00E+00 S9 -1.38E-04 -8.12E-05 -5.33E-05 -4.05E-05 0.00E+00 0.00E+00 S10 -1.52E-03 1.74E-04 -1.15E-04 8.06E-05 0.00E+00 0.00E+00 S11 3.95E-04 -9.65E-04 1.57E-04 -4.27E-05 8.25E-05 -1.26E-04 S12 -8.26E-05 3.45E-04 1.03E-04 0.00E+00 0.00E+00 0.00E+00

[0143] Table 12

[0144] Table 13 lists some basic parameters of the lens barrel and spacer elements of the optical imaging lens 310 in Embodiment 7, such as d2s, d2m, d3s, d3m, D3s, d4s, d4m, D4s, D4m, d5s, d5m, D5s, d0s, d0m, D0s, D0m, EP23, EP34, EP45, CP5, and L. Some of the basic parameters listed in Table 13 are based on... Figure 1 The measurements were obtained using the annotation method shown, and the units of the basic parameters listed in Table 13 are all millimeters (mm).

[0145] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 7 1.55 1.56 1.54 1.54 3.02 2.21 2.21 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 7 3.21 3.21 2.77 3.15 3.87 3.00 4.77 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 7 4.02 6.70 0.41 0.44 0.75 0.22 5.29

[0146] Table 13

[0147] Example 8

[0148] Figure 11 A schematic diagram of the structure of an optical imaging lens 320 according to Embodiment 8 of this application is shown.

[0149] like Figure 11As shown, the optical imaging lens 310 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as an autofocus element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the autofocus element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0150] The optical imaging lens 320 in Embodiment 8 has the same lens group as the optical imaging lens 310 in Embodiment 7. Specifically, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 320 of this embodiment are the same as those in Tables 11 and 12, respectively. The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the included lens barrel and spacer element. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 320 in Embodiment 8 are as follows:

[0151] The units for all the basic parameters listed in Table 14 are millimeters (mm).

[0152] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 8 1.66 1.60 1.50 1.50 3.13 2.21 2.21 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 8 3.29 3.29 2.77 3.15 3.63 3.00 4.77 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 8 4.00 6.70 0.41 0.44 0.74 0.22 5.29

[0153] Table 14

[0154] Example 9

[0155] Figure 12 A schematic diagram of the structure of an optical imaging lens 330 according to Embodiment 9 of this application is shown.

[0156] like Figure 12As shown, the optical imaging lens 310 includes a lens barrel P0 and a lens group and a spacer element group disposed within the lens barrel P0. The lens group, from the object side to the image side, may sequentially include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An optical element, such as an autofocus element, may be disposed between the first lens E1 and the second lens E2. The spacer element group may include a second spacer element P2 disposed between the second lens E2 and the third lens E3, a third spacer element P3 disposed between the third lens E3 and the fourth lens E4, a fourth spacer element P4 disposed between the fourth lens E4 and the fifth lens E5, and a fifth spacer element P5 disposed between the fifth lens E5 and the sixth lens E6. As an example, the lens barrel P0 may be a segmented lens barrel, including a first lens barrel component and a second lens barrel component, wherein the first lens E1 may be housed within the first lens barrel component of the lens barrel P0, and the autofocus element and the second to sixth lenses E2 may be housed within the second lens barrel component of the lens barrel P0.

[0157] The optical imaging lens 330 in Embodiment 9 has the same lens group as the optical imaging lens 310 in Embodiment 7. Specifically, the basic parameter table and aspherical coefficient table of the lens group in the optical imaging lens 330 of this embodiment are the same as those in Tables 11 and 12, respectively. The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the included lens barrel and spacer element. The structural dimensions of the lens barrel and spacer element of the optical imaging lens 330 in Embodiment 9 are as follows:

[0158] The units for all the basic parameters listed in Table 15 are millimeters (mm).

[0159] Example / Parameters d2s d2m d3s d3m D3s d4s d4m 9 1.68 1.67 1.52 1.52 3.02 2.32 2.42 Example / Parameters D4s D4m d5s d5m D5s d0s d0m 9 3.00 3.08 2.72 3.15 3.42 3.06 4.77 Example / Parameters D0s D0m EP23 EP34 EP45 CP5 L 9 4.34 6.70 0.41 0.43 0.63 0.22 5.29

[0160] Table 15

[0161] Figure 13A The on-axis chromatic aberration curves of the optical imaging lenses 310, 320 and 330 of Embodiments 7-9 are shown, which indicate the deflection of the focal point after light of different wavelengths passes through the optical imaging lenses 310, 320 and 330. Figure 13B The astigmatism curves of optical imaging lenses 310, 320 and 330 of embodiments 7-9 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 13C The magnification chromatic aberration curves of the optical imaging lenses 310, 320, and 330 of Embodiments 7-9 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to Figures 13A to 13C It can be seen that the optical imaging lenses 310, 320 and 330 of Examples 7-9 can achieve good imaging quality.

[0162] Table 16 shows the optical imaging lenses of Examples 1 to 9 and the focal length values ​​of each lens, wherein the unit of focal length is millimeters (mm).

[0163]

[0164]

[0165] Table 16

[0166] Table 17 shows the values ​​of the conditional expressions for each of the embodiments in Examples 1 to 9.

[0167] Conditional Implementation Examples 1 2 3 4 5 6 7 8 9 |(D5s-d5s) / f5| 0.30 0.30 0.29 0.13 0.13 0.14 0.11 0.09 0.07 f4 / D4s+|R4 / d4s| 3.32 3.32 3.32 2.24 2.18 2.07 1.87 1.85 1.85 CT4 / EP34 1.49 1.55 1.49 1.61 1.61 1.68 1.24 1.24 1.27 R3 / d2s+d2m / CT2 4.00 3.96 4.00 4.90 4.90 4.94 4.53 4.53 4.66 (D0s-d0s) / f1 -0.14 -0.11 -0.29 -0.45 -0.45 -0.36 -0.22 -0.22 -0.28 (d0m-d0s) / |fmax| 0.12 0.11 0.10 0.04 0.04 0.04 0.18 0.18 0.17 |f5| / (D0m-d5m) 0.82 0.69 0.93 1.35 1.41 1.64 2.79 2.79 2.79 f1 / R1+R7 / D3s 4.80 4.62 4.80 6.01 6.01 6.01 4.54 4.45 4.54 L / ∑CT*|fmin| 5.08 5.08 5.08 5.06 5.15 5.06 4.26 4.26 4.26 |R5+R7| / (d3s+d4m) 3.63 3.63 3.63 4.14 3.95 4.04 2.94 2.97 2.80 (R3-R4) / (D4m-d3m) 3.82 3.82 3.82 3.46 3.75 3.62 2.75 2.56 2.93 EP23 / |R5-R4| 0.05 0.05 0.05 0.08 0.07 0.07 0.07 0.07 0.07 d5s / EP45+d5m / CP5 13.44 11.74 13.66 18.12 18.26 17.64 17.96 18.02 18.54

[0168] Table 17

[0169] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, include: The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side; The spacer element group includes a third spacer element disposed on the image side of the third lens, a fourth spacer element disposed on the image side of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens. as well as The lens barrel, in which the lens group and the spacer element group are housed; The optical imaging lens contains six lenses with optical power. The first lens has negative optical power and its object side is concave. The second lens has positive optical power, and both its object-side and image-side surfaces are convex. The third lens has negative optical power, and its object side is convex while its image side is concave. The fourth lens has positive optical power, and both its object-side and image-side surfaces are convex. The fifth lens has negative optical power; The sixth lens has optical power, and its object side is convex and its image side is concave. The center thickness CT4 of the fourth lens on the optical axis, the spacing EP34 between the third and fourth spacers along the optical axis, the effective focal length f1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R7 of the object-side surface of the fourth lens, the outer diameter D3s of the object-side surface of the third spacer, the inner diameter d5s of the object-side surface of the fifth spacer, and the outer diameter D5s of the object-side surface of the fifth spacer satisfy the following conditions: 1.2 <CT4 / EP34<1.7, 4.45≤f1 / R1+R7 / D3s≤6.01, and 0.07≤|(D5s-d5s) / f5|≤0.

3.

2. The optical imaging lens according to claim 1, characterized in that, The effective focal length f4 of the fourth lens, the radius of curvature R4 of the image-side surface of the second lens, the inner diameter d4s of the object-side surface of the fourth spacer element, and the outer diameter D4s of the object-side surface of the fourth spacer element satisfy the following: 1.85≤f4 / D4s+|R4 / d4s|≤3.

32.

3. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a second spacer element disposed on the image side of the second lens, wherein the radius of curvature R3 of the object side of the second lens, the center thickness CT2 of the second lens on the optical axis, the inner diameter d2s of the object side of the second spacer element, and the inner diameter d2m of the image side of the second spacer element satisfy the following: 3.96≤R3 / d2s+d2m / CT2≤4.

94.

4. The optical imaging lens according to claim 1, characterized in that, The effective focal length f1 of the first lens, the outer diameter D0s of the object-side end face of the lens barrel, and the inner diameter d0s of the object-side end face of the lens barrel satisfy the following: -10 <f1 / (D0s-d0s)<-2.0。 5. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R5 of the object-side surface of the third lens, the radius of curvature R7 of the object-side surface of the fourth lens, the inner diameter d3s of the object-side surface of the third spacer element, and the inner diameter d4m of the image-side surface of the fourth spacer element satisfy the following: 2.80≤|R5+R7| / (d3s+d4m)≤4.

14.

6. The optical imaging lens according to claim 1, characterized in that, The radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the outer diameter D4m of the image-side surface of the fourth spacer element, and the inner diameter d3m of the image-side surface of the third spacer element satisfy the following: 2.56≤(R3-R4) / (D4m-d3m)≤3.

82.

7. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a second spacer element disposed on the image side of the second lens. The spacing EP23 between the second spacer element and the third spacer element along the optical axis, and the radius of curvature R4 of the image side of the second lens and the radius of curvature R5 of the object side of the third lens satisfy the following: 0.05≤EP23 / |R5-R4|<0.

1.

8. The optical imaging lens according to claim 1, characterized in that, The inner diameter d5s of the object side of the fifth spacer, the spacing EP45 between the fourth and fifth spacers along the optical axis, the inner diameter d5m of the image side of the fifth spacer, and the maximum thickness CP5 of the fifth spacer satisfy the following: 11.74≤d5s / EP45+d5m / CP5≤18.

54.

9. The optical imaging lens according to any one of claims 1 to 8, characterized in that, The maximum absolute value of the focal length of each lens in the lens group, |fmax|, and the inner diameter d0s of the object-side end face of the lens barrel and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following: 0 < (d0m - d0s) / |fmax| < 0.

2.

10. The optical imaging lens according to any one of claims 1 to 8, characterized in that, The minimum of the following: the maximum height L of the lens barrel along the optical axis, the sum of the center thicknesses of each lens in the lens group along the optical axis ∑CT, and the absolute value of the focal length of each lens in the lens group |fmin|, satisfies the following: 4.26 mm≤L / ∑CT |fmin|≤5.15 mm。 11. The optical imaging lens according to any one of claims 1 to 8, characterized in that, An optical element is provided between the first lens and the second lens, and the optical element is one of a cover glass, a filter assembly, or an autofocus assembly.

12. The optical imaging lens according to claim 11, characterized in that, The lens barrel includes a first lens barrel component and a second lens barrel component, the first lens is housed in the first lens barrel component, and the optical element and the second to sixth lenses are housed in the second lens barrel component.

13. An optical imaging lens, characterized in that, include: The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side; The spacer element group includes a third spacer element disposed on the image side of the third lens and a fifth spacer element disposed on the image side of the fifth lens; as well as The lens barrel, in which the lens group and the spacer element group are housed; The optical imaging lens contains six lenses with optical power. The first lens has negative optical power and its object side is concave. The second lens has positive optical power, and both its object-side and image-side surfaces are convex. The third lens has negative optical power, and its object side is convex while its image side is concave. The fourth lens has positive optical power, and both its object-side and image-side surfaces are convex. The fifth lens has negative optical power; The sixth lens has optical power, and its object side is convex and its image side is concave. The effective focal length f1 of the first lens, the radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R7 of the object-side surface of the fourth lens, the outer diameter D3s of the object-side surface of the third spacer element, the inner diameter d5s of the object-side surface of the fifth spacer element, the outer diameter D5s of the object-side surface of the fifth spacer element, the effective focal length f5 of the fifth lens, the outer diameter D0m of the image-side end face of the lens barrel, and the inner diameter d5m of the image-side surface of the fifth spacer element satisfy the following: 4.45≤f1 / R1+R7 / D3s≤6.01 0.07≤|(D5s-d5s) / f5|≤0.3, 0.69≤|f5| / (D0m-d5m)≤2.

79.

14. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens, wherein the effective focal length f4 of the fourth lens, the radius of curvature R4 of the image side of the second lens, the inner diameter d4s of the object side of the fourth spacer element, and the outer diameter D4s of the object side of the fourth spacer element satisfy the following: 1.85≤f4 / D4s+|R4 / d4s|≤3.

32.

15. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a second spacer element disposed on the image side of the second lens, wherein the radius of curvature R3 of the object side of the second lens, the center thickness CT2 of the second lens on the optical axis, the inner diameter d2s of the object side of the second spacer element, and the inner diameter d2m of the image side of the second spacer element satisfy the following: 3.96≤R3 / d2s+d2m / CT2≤4.

94.

16. The optical imaging lens according to claim 13, characterized in that, The effective focal length f1 of the first lens, the outer diameter D0s of the object-side end face of the lens barrel, and the inner diameter d0s of the object-side end face of the lens barrel satisfy the following: -10 <f1 / (D0s-d0s)<-2.0。 17. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R5 of the object side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, the inner diameter d3s of the object side surface of the third spacer element, and the inner diameter d4m of the image side surface of the fourth spacer element satisfy the following: 2.80≤|R5+R7| / (d3s+d4m)≤4.

14.

18. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a third spacer element disposed on the image side of the third lens and a fourth spacer element disposed on the image side of the fourth lens. The radius of curvature R3 of the object side surface of the second lens, the radius of curvature R4 of the image side surface of the second lens, the outer diameter D4m of the image side surface of the fourth spacer element, and the inner diameter d3m of the image side surface of the third spacer element satisfy the following: 2.56≤(R3-R4) / (D4m-d3m)≤3.

82.

19. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a second spacer element disposed on the image side of the second lens and a third spacer element disposed on the image side of the third lens. The spacing EP23 between the second spacer element and the third spacer element along the optical axis, and the radius of curvature R4 of the image side surface of the second lens and the radius of curvature R5 of the object side surface of the third lens satisfy the following: 0.05≤EP23 / |R5-R4|<0.

1.

20. The optical imaging lens according to claim 13, characterized in that, The spacer element group further includes a fourth spacer element disposed on the image side of the fourth lens. The inner diameter d5s of the object side of the fifth spacer element, the spacing EP45 between the fourth and fifth spacer elements along the optical axis, the inner diameter d5m of the image side of the fifth spacer element, and the maximum thickness CP5 of the fifth spacer element satisfy the following: 11.74≤d5s / EP45+d5m / CP5≤18.

54.

21. The optical imaging lens according to any one of claims 13 to 20, characterized in that, The maximum absolute value of the focal length of each lens in the lens group, |fmax|, and the inner diameter d0s of the object-side end face of the lens barrel and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following: 0 < (d0m-d0s) / |fmax| < 0.

2.

22. The optical imaging lens according to any one of claims 13 to 20, characterized in that, The minimum of the following: the maximum height L of the lens barrel along the optical axis, the sum of the center thicknesses of each lens in the lens group along the optical axis ∑CT, and the absolute value of the focal length of each lens in the lens group |fmin|, satisfies the following: 4.26 mm≤L / ∑CT |fmin|≤5.15 mm。 23. The optical imaging lens according to any one of claims 13 to 20, characterized in that, An optical element is provided between the first lens and the second lens, and the optical element is one of a cover glass, a filter assembly, or an autofocus assembly.

24. The optical imaging lens according to claim 23, characterized in that, The lens barrel includes a first lens barrel component and a second lens barrel component, the first lens is housed in the first lens barrel component, and the optical element and the second to sixth lenses are housed in the second lens barrel component.

Images