Optical imaging lens

Abstract

The utility model discloses an optical imaging lens, which comprises a lens group and a spacing element group, and is characterized in that the lens group is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image side along an optical axis, the center thickness of the third lens on the optical axis is larger than the center thickness of any lens in the lens group except the third lens on the optical axis. The spacing element group comprises a second spacing element and a third spacing element; the optical imaging lens satisfies the following conditions: 2.08 lt; cP3 / T34lt; 6.54, 0.84 lt, 6.54, and 0.84 lt; d2m / CT3lt; 1.50, 1.50; wherein CP3 is the maximum thickness of the third spacing element in the optical axis direction, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, d2m is the inner diameter of the image side face of the second spacing element, and CT3 is the center thickness of the third lens on the optical axis.

Description

Technical Field

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

[0002] In recent years, with the increasing changes in consumer demands, the requirements for optical imaging lenses have gradually become more complex and diverse. In different application scenarios, the performance of optical imaging lenses varies.

[0003] Six-piece optical imaging lenses are widely used in fields such as mobile phones, VR head-mounted devices, smart watches, smart glasses, and drones. However, there are still some deficiencies in the imaging quality and processability of existing six-piece optical imaging lenses. For example, the unreasonable setting of the spacer elements between adjacent lenses will affect the assembly stability of the lens and the transmission of light, thereby affecting the imaging quality of the lens. Therefore, how to reasonably arrange the spatial layout and related parameters of the lenses and spacer elements to continuously improve the performance requirements of the lens and continuously innovate and seek breakthroughs in the structure has become a development direction for many lens manufacturers to enhance their competitiveness. Summary of the Utility Model

[0004] This application provides an optical imaging lens, which includes a lens barrel and a lens group and a spacer element group accommodated in the lens barrel. The lens group is composed of 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. Among them, the central thickness of the third lens on the optical axis is greater than the central thickness of any other lens in the lens group except the third lens on the optical axis; the spacer element group includes a second spacer element and a third spacer element. The second spacer element is placed between the second lens and the third lens and contacts the image side surface of the second lens, and the third spacer element is placed between the third lens and the fourth lens and contacts the image side surface of the third lens; the optical imaging lens satisfies: 2.08 < CP3 / T34 < 6.54 and 0.84 < d2m / CT3 < 1.50; where CP3 is the maximum thickness of the third spacer element along the optical axis direction, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, d2m is the inner diameter of the image side surface of the second spacer element, and CT3 is the central thickness of the third lens on the optical axis.

[0005] According to an exemplary embodiment of the present application, the spacer element group further includes a fifth spacer element. The fifth spacer element is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 2.67 < f6 / (CP5 + CT6) < 4.64 and -4.34 < f5 / CP5 < -2.12, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, CP5 is the maximum thickness of the fifth spacer element along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis.

[0006] According to an exemplary embodiment of the present application, the spacer element group further includes a fifth spacer element, which is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 17.28 < T56 / T45 < 20.75 and 16.21 < CP5 / T45 < 33.68, where T45 is the axial distance between the fourth lens and the fifth lens, T56 is the axial distance between the fifth lens and the sixth lens, and CP5 is the maximum thickness of the fifth spacer element along the optical axis direction.

[0007] According to an exemplary embodiment of the present application, the spacer element group further includes a fifth spacer element, which is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 1.43 < (D5s - d5s) / T56 < 3.13, where D5s is the outer diameter of the object side surface of the fifth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, and T56 is the axial distance between the fifth lens and the sixth lens on the optical axis.

[0008] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: -3.76 < D1m / R3 < -1.96 and 5.46 < f2 / R4 < 7.56, where D1m is the outer diameter of the image side surface of the first spacer element, R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, and f2 is the effective focal length of the second lens.

[0009] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 0.42 < (D1s - d1s) / (D2s - d2s) < 1.56, where D1s is the outer diameter of the object side surface of the first spacer element, d1s is the inner diameter of the object side surface of the first spacer element, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

[0010] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 1.51 < SAG12 / (CT1 + CP1) < 2.05, where SAG12 is the axial distance between the intersection point of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens, CT1 is the central thickness of the first lens on the optical axis, and CP1 is the maximum thickness of the first spacer element along the optical axis direction.

[0011] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element and a fifth spacer element. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens, and the fifth spacer element is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 2.06 < EP45 / CT5 < 2.74, where EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis.

[0012] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 30.13 < CT4 / T45 < 44.70 and 2.26 < d3m / CT4 < 3.11, where CT4 is the central thickness of the fourth lens on the optical axis, T45 is the distance between the fourth lens and the fifth lens on the optical axis, and d3m is the inner diameter of the image side surface of the third spacer element.

[0013] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: -10.40 < f2 / (D2s - d2s) < -4.60, where f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element.

[0014] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 4.99 < (CT2 + CP2) / T23 < 34.52, where CT2 is the central thickness of the second lens on the optical axis, CP2 is the maximum thickness of the second spacer element along the optical axis direction, and T23 is the distance between the second lens and the third lens on the optical axis.

[0015] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.04 < d0m / d0s < 1.44, where d0m is the inner diameter of the image side end surface of the lens barrel, and d0s is the inner diameter of the object side end surface of the lens barrel.

[0016] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.24 < f3 / (CT3 - CP3) < 16.94, where f3 is the effective focal length of the third lens.

[0017] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.13 < R5 / d2m < 2.10 and 0.75 < SAG31 / T23 < 7.15, where R5 is the curvature radius of the object side surface of the third lens, SAG31 is the axial distance between the intersection of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and T23 is the distance between the second lens and the third lens on the optical axis.

[0018] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.09 < D3m / f4 < 1.70, where D3m is the outer diameter of the image side of the third spacer element, and f4 is the effective focal length of the fourth lens.

[0019] The optical imaging lens provided by the present application includes six lenses. Among them, the third lens has the largest thickness, and the combination of the third lens and its front and rear spacer elements has a greater impact on the final imaging quality. In the present application, a second spacer element and a third spacer element are respectively provided on the image sides of the second lens and the third lens, and by controlling the ratios of the conditional CP3 / T34 and d2m / CT3 within a certain range, it is beneficial to control the bending degrees of the third lens and the fourth lens within a reasonable range, ensure the transmission of light, ensure the thickness of the third spacer element and its processability, and at the same time, the clear aperture of the third lens can be limited within a reasonable range, improving the imaging brightness, and further improving the imaging quality of the optical imaging lens. Description of the Drawings

[0020] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more obvious. Among them:

[0021] Figure 1 It shows a schematic diagram of the structural arrangement and some parameters of an optical imaging lens of the present application;

[0022] Figure 2 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 1 of the present application;

[0023] Figure 3 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 2 of the present application;

[0024] Figure 4 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 3 of the present application;

[0025] Figure 5 It shows the axial chromatic aberration curve (A1), astigmatism curve (B1), and longitudinal chromatic aberration curve (C1) of the optical imaging lens of Embodiments 1 to 3 of the present application;

[0026] Figure 6 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 4 of the present application;

[0027] Figure 7 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 5 of the present application;

[0028] Figure 8 It shows a schematic diagram of the structure of the optical imaging lens of Embodiment 6 of the present application;

[0029] Figure 9 The on-axis chromatic aberration curve (A2), astigmatism curve (B2), and magnification chromatic aberration curve (C2) of the optical imaging lenses of Embodiments 4 to 6 of this application are shown.

[0030] Figure 10 A schematic diagram of the structure of the optical imaging lens of Embodiment 7 of this application is shown;

[0031] Figure 11 A schematic diagram of the structure of the optical imaging lens of Embodiment 8 of this application is shown;

[0032] Figure 12 A schematic diagram of the structure of the optical imaging lens of Embodiment 9 of this application is shown;

[0033] Figure 13 The on-axis chromatic aberration curve (A3), astigmatism curve (B3), and magnification chromatic aberration curve (C3) of the optical imaging lenses of Embodiments 7 to 9 of this application are shown.

[0034] Figure 14 The defocus curve of the optical imaging lens of this application is shown when CP3 / T34 = 3.28 and d2m / CT3 = 0.01.

[0035] Figure 15 The defocus curve of the optical imaging lens of this application is shown when CP3 / T34 = 3.28 and d2m / CT3 = 1.28 are satisfied;

[0036] Figure 16 The defocus curve of the optical imaging lens of this application is shown when CP3 / T34 = 3.28 and d2m / CT3 = 16. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In this text, if a lens surface is convex and its location is not defined, it means that the lens surface is convex at least in the paraxial region; if a lens surface is concave and its location is not defined, it means that the lens surface is concave at least in the paraxial region. The paraxial region refers to the region near the optical axis. 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 image plane is called the image-side surface of the lens.

[0041] It should also be understood that the terms "comprising" and / or "having," when 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.

[0042] 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.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. For example, the lens group, lens barrel, and spacer element group in the various embodiments of this application can be arbitrarily combined, and it is not limited to the lens group in one embodiment being combined only with the lens barrel, spacer element group, etc. of that embodiment.

[0044] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Figure 1 A schematic diagram illustrating the structural arrangement and some parameters of an optical imaging lens according to this application is provided to facilitate a better understanding of this application. Figure 1 As shown, CP2 is the maximum thickness of the second spacer element along the optical axis direction, CP3 is the maximum thickness of the third spacer element along the optical axis direction, CP5 is the maximum thickness of the fifth spacer element along the optical axis direction, D2s is the outer diameter of the object side surface of the second spacer element, D5s is the outer diameter of the object side surface of the fifth spacer element, D1s is the outer diameter of the object side surface of the first spacer element, d0s is the inner diameter of the object side end surface of the lens barrel, d5s is the inner diameter of the object side surface of the fifth spacer element, d1s is the inner diameter of the object side surface of the first spacer element, d2s is the inner diameter of the object side surface of the second spacer element, d2m is the inner diameter of the image side surface of the second spacer element, d3m is the inner diameter of the image side surface of the third spacer element, D3m is the outer diameter of the image side surface of the third spacer element, D1m is the outer diameter of the image side surface of the first spacer element, d0m is the inner diameter of the image side end surface of the lens barrel, and EP45 is the distance along the optical axis between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element.

[0046] Reference Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 、 Figure 11 and Figure 12 According to references

[0047] In the optical imaging lens provided by this application, the third lens has the greatest thickness. The combination of the third lens and its front and rear spacers has a significant impact on the final image quality. This application sets the second spacer and the third spacer on the image side of the second lens and the third lens respectively, and controls the ratio of the conditional expression CP3 / T34 within a certain range. This helps to control the curvature of the third lens and the fourth lens within a reasonable range, ensuring the transmission of light, while ensuring the thickness and manufacturability of the third spacer. Furthermore, by controlling the ratio of the conditional expression d2m / CT3 within a certain range, the light transmission aperture of the third lens can be limited within a reasonable range, improving the imaging brightness and thus improving the imaging quality of the optical imaging lens.

[0048] Figure 14 The defocus curve of the optical imaging lens is shown when CP3 / T34 = 3.28 and d2m / CT3 = 0.01. Figure 14 The conditional formula CP3 / T34 of the optical imaging lens meets the scope defined in this application, which is beneficial for controlling the curvature of the third and fourth lenses within a reasonable range, ensuring light transmission, and simultaneously ensuring the thickness and manufacturability of the third spacer element; however, the conditional formula d2m / CT3 is less than the lower limit of the scope defined in this application, and d2m is too small, resulting in an excessively small aperture of the third lens, reducing the imaging brightness. Figure 14 As can be seen, the peak positions of the defocus curve are relatively dispersed, and the focus shift is large, which affects the imaging quality of the optical imaging lens.

[0049] Figure 15 The defocus curve of the optical imaging lens of this application is shown when CP3 / T34 = 3.28 and d2m / CT3 = 1.28. Figure 15 The conditional formulas CP3 / T34 and d2m / CT3 of the optical imaging lens both meet the limitations of this application, which is beneficial for controlling the curvature of the third and fourth lenses within a reasonable range, ensuring light transmission, and simultaneously ensuring the thickness and manufacturability of the third spacer element. This allows for limiting the aperture of the third lens within a reasonable range, improving imaging brightness. Figure 15 As can be seen, the peak positions of the defocus curve are relatively concentrated, the focus is well converged, and good image quality can be obtained in each field of view.

[0050] Figure 16 The defocus curve of the optical imaging lens is shown when CP3 / T34 = 3.28 and d2m / CT3 = 16. Figure 16The conditional formula CP3 / T34 of the optical imaging lens meets the limitations of this application, which is beneficial for controlling the curvature of the third and fourth lenses within a reasonable range, ensuring light transmission, and simultaneously ensuring the thickness and manufacturability of the third spacer element; however, the conditional formula d2m / CT3 exceeds the upper limit of the limitations of this application, and d2m is too large, so the second spacer element fails to effectively block excess light from the external field of view. Figure 16 As can be seen, the peak positions of the defocus curve are relatively dispersed, and the focus shift is quite serious, which affects the imaging quality of the optical imaging lens.

[0051] In an exemplary embodiment, each lens has at least one object-side surface facing the subject and one image-side surface facing the imaging plane. Each lens has an effective diameter region capable of transmitting light and a non-effective diameter region surrounding the effective diameter region that cannot transmit light. In the first to sixth lenses, any two adjacent lenses may have a gap on the optical axis, which may be an air gap.

[0052] In an exemplary embodiment, the spacer group may include at least one spacer element. It should be understood that this application does not specifically limit the number of spacer elements; at least one spacer element may be provided between any two adjacent lenses, and the entire optical imaging lens may include any number of spacer elements. Spacer elements help the optical imaging lens intercept excess reflective light paths, reduce stray light and ghosting, and improve image quality.

[0053] In an exemplary embodiment, the optical imaging lens further includes a lens barrel. Lens groups and spacer element groups are disposed within the lens barrel. The lens barrel includes an object-side end face, an image-side end face, an outer annular surface, and an inner annular surface, wherein the end face of the lens barrel closest to the object side is the object-side end face of the lens barrel, and the end face of the lens barrel closest to the image side is the image-side end face of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel furthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface.

[0054] In an exemplary embodiment, the optical imaging lens may further include an aperture stop for limiting the light beam. It should be noted that the aperture stop can be positioned between or to one side of any lens, depending on actual needs. Exemplarily, the aperture stop is positioned between the second lens and the third lens.

[0055] In an exemplary embodiment, the spacer element group further includes a fifth spacer element disposed between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the optical imaging lens satisfies: 2.67 < f6 / (CP5 + CT6) < 4.64 and -4.34 < f5 / CP5 < -2.12, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, CP5 is the maximum thickness of the fifth spacer element along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis. By controlling the effective focal lengths of the fifth lens and the sixth lens, it is possible to ensure that the fifth lens and the sixth lens converge light rays. At the same time, by restricting the thickness of the fifth spacer element, it is beneficial to the improvement of stray light and the imaging quality of the optical imaging lens is improved.

[0056] In an exemplary embodiment, the spacer element group further includes a fifth spacer element disposed between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the optical imaging lens satisfies: 17.28 < T56 / T45 < 20.75 and 16.21 < CP5 / T45 < 33.68, where T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis, and CP5 is the maximum thickness of the fifth spacer element along the optical axis direction. By controlling the above conditions, the spacing distances between the fourth lens, the fifth lens, and the sixth lens on the optical axis are ensured to be within a reasonable range, and the decrease in the imaging quality of the lens caused by large fluctuations in the spacing distance can be effectively reduced during the lens production process.

[0057] In an exemplary embodiment, the spacer element group further includes a fifth spacer element disposed between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the optical imaging lens satisfies: 1.43 < (D5s - d5s) / T56 < 3.13, where D5s is the outer diameter of the object side surface of the fifth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, and T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis. By controlling the above conditions, the bearing range of the fifth spacer element on the object side surface is ensured, and the stability of lens assembly is guaranteed; by controlling the spacing distance between the fifth lens and the sixth lens on the optical axis, it is helpful for the sixth lens to converge light rays and ensure the imaging clarity of the lens.

[0058] In an exemplary embodiment, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: -3.76 < D1m / R3 < -1.96 and 5.46 < f2 / R4 < 7.56, where D1m is the outer diameter of the image side surface of the first spacer element, R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, and f2 is the effective focal length of the second lens. By controlling the above conditions, it is beneficial to control the converging trend of light rays after passing through the first lens and the second lens, effectively improving the brightness of the lens, and at the same time enabling the field angle of the lens to be controlled within a reasonable range.

[0059] In an exemplary embodiment, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 0.42 < (D1s - d1s) / (D2s - d2s) < 1.56, where D1s is the outer diameter of the object side surface of the first spacer element, d1s is the inner diameter of the object side surface of the first spacer element, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element. By controlling the inner diameters of the object side surfaces of the first spacer element and the second spacer element, the generation of stray light can be effectively suppressed, ensuring the clarity of imaging. At the same time, by controlling the outer diameters of the object side surfaces of the first spacer element and the second spacer element, the width of the flange surface of the second lens is ensured, and thus the bearing area of the second lens is ensured.

[0060] In an exemplary embodiment, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 1.51 < SAG12 / (CT1 + CP1) < 2.05, where SAG12 is the axial distance between the intersection point of the image side surface of the first lens and the optical axis and the vertex of the effective radius of the image side surface of the first lens, CT1 is the central thickness of the first lens on the optical axis, and CP1 is the maximum thickness of the first spacer element along the optical axis direction. By controlling the above conditions, the bending degree of the first lens is restricted, which is beneficial to the processing and shaping of the first lens. At the same time, the field angle of the lens is increased, ensuring the imaging area of the lens.

[0061] In an exemplary embodiment, the optical imaging lens satisfies: 30.13 < CT4 / T45 < 44.70 and 2.26 < d3m / CT4 < 3.11, where CT4 is the central thickness of the fourth lens on the optical axis, T45 is the distance between the fourth lens and the fifth lens on the optical axis, and d3m is the inner diameter of the image side surface of the third spacer element. By controlling the ratio of the conditional CT4 / T45 within a certain range, the central thickness of the fourth lens can be restricted, preventing the risk of welding marks due to an excessive ratio of the thickness to the thinness of the fourth lens; at the same time, by restricting the distance between the fourth lens and the fifth lens on the optical axis, it is beneficial to ensure the resolving power of the lens; by restricting d3m / CT4, the bearing position of the fourth lens is ensured, preventing the fourth lens from being unstable in bearing and improving the assembly stability of the lens.

[0062] In an exemplary embodiment, the optical imaging lens satisfies: -10.40 < f2 / (D2s - d2s) < -4.60, where f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side surface of the second spacer element, and d2s is the inner diameter of the object side surface of the second spacer element. By controlling the above conditions, the curvature of the second lens is controlled, ensuring the transmission of light, and by restricting the inner diameter and outer diameter of the second spacer element, it is beneficial to improve the stray light at the edges of the first lens and the second lens and improve the imaging quality.

[0063] In an exemplary embodiment, the optical imaging lens satisfies: 4.99 < (CT2 + CP2) / T23 < 34.52, where CT2 is the central thickness of the second lens on the optical axis, CP2 is the maximum thickness of the second spacer element along the optical axis, and T23 is the distance between the second lens and the third lens on the optical axis. By controlling the above conditions, the thickness of the second spacer element is controlled within a reasonable range, which helps to play the role of blocking light of the second spacer element and improve the stray light of the lens; by controlling the central thickness of the second lens on the optical axis and the distance between the second lens and the third lens on the optical axis, it is beneficial to improve the assembly stability of the second lens and the third lens.

[0064] In an exemplary embodiment, the optical imaging lens satisfies: 1.04 < d0m / d0s < 1.44, where d0m is the inner diameter of the image side end face of the lens barrel, and d0s is the inner diameter of the object side end face of the lens barrel. By controlling the above conditions, the sizes of the object side end face and the image side end face of the lens barrel can be restricted to be closer to each other, making the step difference of the lens smaller and ensuring the stability of the lens assembly.

[0065] In an exemplary embodiment, the optical imaging lens satisfies: 1.24 < f3 / (CT3 - CP3) < 16.94, where f3 is the effective focal length of the third lens, CP3 is the maximum thickness of the third spacer element along the optical axis direction, and CT3 is the central thickness of the third lens on the optical axis. By controlling the above conditions, it is beneficial to control the curvature of the third lens, which is conducive to the molding process of the third lens. At the same time, by controlling the thickness of the third spacer element, a larger stray light improvement space is ensured, which is beneficial to improving the imaging quality of the lens.

[0066] In an exemplary embodiment, the optical imaging lens satisfies: 1.13 < R5 / d2m < 2.10 and 0.75 < SAG31 / T23 < 7.15, where R5 is the curvature radius of the object side surface of the third lens, d2m is the inner diameter of the image side surface of the second spacer element, SAG31 is the axial distance between the intersection point of the object side surface of the third lens and the optical axis and the vertex of the effective radius of the object side surface of the third lens, and T23 is the spacing distance between the second lens and the third lens on the optical axis. By controlling R5 / d2m to further control the minimum distance between the second spacer element and the third lens in the direction perpendicular to the optical axis, that is, by controlling the inner diameter of the image side surface of the second spacer element, it is beneficial for the second spacer element to block stray light. At the same time, the machinability of the second spacer element is ensured, preventing the inner diameter of the image side surface of the second spacer element from being too small, causing the second spacer element to bend and deflect, resulting in a decrease in the brightness of the lens, or preventing the inner diameter of the image side surface of the second spacer element from being too large, causing the second spacer element to fail to play the role of blocking stray light. By controlling SAG31 / T23 within a certain range, the curvature of the third lens and the molding process of the third lens are ensured. At the same time, by controlling the spacing distance between the second lens and the third lens on the optical axis, the imaging quality of the lens is ensured.

[0067] In an exemplary embodiment, the optical imaging lens satisfies: 1.09 < D3m / f4 < 1.70, where D3m is the outer diameter of the image side surface of the third spacer element, and f4 is the effective focal length of the fourth lens. By controlling the above conditions, it helps to control the bearing area of the fourth lens, prevent large steps from occurring in the lens, and at the same time control the effective focal length of the fourth lens, which is beneficial to ensuring the light transmission path.

[0068] In an exemplary embodiment, the spacer element group further includes a fourth spacer element and a fifth spacer element. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens, and the fifth spacer element is disposed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; the optical imaging lens satisfies: 2.06 < EP45 / CT5 < 2.74, where EP45 is the distance between the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, and CT5 is the central thickness of the fifth lens on the optical axis. By controlling the edge thickness and the central thickness of the fifth lens, the thickness ratio of the fifth lens can be within an effective molding range, preventing the risk of weld marks on the fifth lens.

[0069] In an exemplary embodiment, the spacer element group further includes a second auxiliary spacer element, a third auxiliary spacer element, and a fifth auxiliary spacer element. The second auxiliary spacer element is disposed on the image side of the second spacer element and at least partially contacts the image side surface of the second spacer element, the third auxiliary spacer element is disposed on the image side of the third spacer element and at least partially contacts the image side surface of the third spacer element, and the fifth auxiliary spacer element is disposed on the image side of the fifth spacer element and at least partially contacts the image side surface of the fifth spacer element, which can improve the stability of lens installation.

[0070] The second aspect of the present application provides an optical imaging lens, which includes a lens barrel and a lens group and a spacer element group accommodated in the lens barrel. The lens group is composed of 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. Among them, the central thickness of the third lens on the optical axis is greater than the central thickness of any one of the lenses in the lens group other than the third lens; the spacer element group includes a first spacer element, and the first spacer element is disposed between the first lens and the second lens and contacts the image side surface of the first lens; the optical imaging lens satisfies: 1.24 < f3 / (CT3 - CP3) < 16.94, where f3 is the effective focal length of the third lens, CP3 is the maximum thickness of the third spacer element along the optical axis direction, and CT3 is the central thickness of the third lens on the optical axis. By controlling the above conditions, it is beneficial to control the bending degree of the third lens, which is conducive to the molding process of the third lens. At the same time, by controlling the thickness of the third spacer element, a larger stray light improvement space is ensured, which is beneficial to improving the imaging quality of the lens.

[0071] It should be understood that this application focuses on performance optimization of a six-element lens. Specifically, this application focuses on how to rationally design light transmission before and after the third lens, or issues such as assembly stability, while maximizing the thickness of the third lens. The specific power distribution and surface configuration of the six lenses are not the focus of this application; these settings can be adjusted as needed. In other words, although several specific power distributions and surface configurations for the imaging lens group are shown in the embodiments of this application, it should be understood that these embodiments are merely exemplary, and the imaging lens group in this application should not be limited to the specific situations shown in the embodiments.

[0072] Those skilled in the art will understand that, without departing from the technical solutions claimed in this application, the number of lenses and spacers constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0073] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0074] Example 1

[0075] Figure 2 A schematic diagram of the optical imaging lens of Embodiment 1 of this application is shown. Figure 2 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0076] 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 negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. 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.

[0077] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a fifth spacer P5. The first spacer P1 is positioned between a first lens E1 and a second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. The fifth spacer P5 is positioned between the fifth lens E5 and the sixth lens E6, with its object-side surface at least partially contacting the image-side surface S10 of the fifth lens E5.

[0078] In the example, light from the object passes sequentially through surfaces S1 to S12 and is eventually imaged onto the imaging surface (not shown).

[0079] Table 1 shows the basic parameters of the lens group of the optical imaging lens of Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0080] Table 1

[0081]

[0082] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0083]

[0084] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical surfaces S1 to S12 in Example 1.

[0085] Table 2

[0086] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 5.2906E-02 -2.5580E-02 1.0199E-02 -3.2805E-03 7.6923E-04 -1.2277E-04 1.2516E-05 -7.3111E-07 1.8550E-08 S2 6.6250E-02 -1.8702E-02 -1.2490E-02 3.0512E-02 -2.9366E-02 1.6095E-02 -5.1821E-03 9.1214E-04 -6.7794E-05 S3 8.3798E-03 -5.0206E-03 9.5557E-04 1.0551E-03 -1.0013E-03 3.9495E-04 -7.3731E-05 4.7322E-06 0.0000E+00 S4 8.8790E-03 -2.5009E-02 4.4190E-02 -4.6939E-02 3.2857E-02 -1.4818E-02 4.1477E-03 -6.5576E-04 4.4817E-05 S5 5.5523E-03 -2.4053E-02 4.0246E-02 -4.3016E-02 3.0884E-02 -1.4535E-02 4.2772E-03 -7.1136E-04 5.0930E-05 S6 -1.4679E-02 3.0812E-03 1.2730E-03 -1.7386E-03 9.8176E-04 -3.2466E-04 6.4074E-05 -6.9440E-06 3.1807E-07 S7 5.9808E-03 -6.1668E-03 3.9903E-03 -1.3884E-03 2.7515E-04 -2.3136E-05 -1.6960E-06 5.1165E-07 -3.0554E-08 S8 2.4050E-02 -6.2040E-02 6.6350E-02 -3.9971E-02 1.4537E-02 -3.2472E-03 4.3677E-04 -3.2491E-05 1.0278E-06 S9 1.1183E-02 -4.5720E-02 5.2625E-02 -3.3200E-02 1.2303E-02 -2.7649E-03 3.7209E-04 -2.7618E-05 8.6977E-07 S10 -1.7773E-02 1.3891E-02 -4.8508E-03 8.0834E-04 1.1513E-05 -3.2871E-05 6.5373E-06 -5.8263E-07 2.0572E-08 S11 -1.7756E-02 4.5789E-03 -1.0550E-03 1.8514E-04 -2.0480E-05 9.9790E-07 3.4791E-08 -6.2467E-09 2.0137E-10 S12 -8.3050E-03 -7.4975E-04 7.4730E-04 -2.2847E-04 4.1109E-05 -4.6881E-06 3.3100E-07 -1.3140E-08 2.2290E-10

[0087] Example 2

[0088] Figure 3 A schematic diagram of the optical imaging lens of Embodiment 2 of this application is shown. Figure 3 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0089] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, and a second auxiliary spacer P2b. The first spacer P1 is positioned between a first lens E1 and a second lens E2, with its object-side surface at least partially in contact with the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially in contact with the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially in contact with the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially in contact with the image-side surface S8 of the fourth lens E4. The fifth spacer P5 is positioned between the fifth lens E5 and the sixth lens E6, with its object-side surface at least partially in contact with the image-side surface S10 of the fifth lens E5. The second auxiliary spacer element P2b is placed on the image side of the second spacer element P2 and is at least partially in contact with the image side surface of the second spacer element P2.

[0090] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in Embodiment 1. Its basic parameters are detailed in Tables 1 and 2, and will not be repeated here.

[0091] The difference between this embodiment and Embodiment 1 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0092] Example 3

[0093] Figure 4 A schematic diagram of the optical imaging lens of Embodiment 3 of this application is shown. Figure 4 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0094] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, a third auxiliary spacer P3b, and a fifth auxiliary spacer P5b. The first spacer P1 is positioned between the first lens E1 and the second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. The fifth spacer element P5 is positioned between the fifth lens E5 and the sixth lens E6, and the object-side surface of the fifth spacer element P5 is at least partially in contact with the image-side surface S10 of the fifth lens E5. The third auxiliary spacer element P3b is positioned on the image-side of the third spacer element P3 and is at least partially in contact with the image-side surface of the third spacer element P3. The fifth auxiliary spacer element P5b is positioned on the image-side of the fifth spacer element P5 and is at least partially in contact with the image-side surface of the fifth spacer element P5.

[0095] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in Embodiment 1. Its basic parameters are detailed in Tables 1 and 2, and will not be repeated here.

[0096] The difference between this embodiment and Embodiment 1 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0097] Figure 5 (A1) shows the on-axis chromatic aberration curves of the optical imaging lenses of Examples 1 to 3, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 5 (B1) shows the astigmatism curves of the optical imaging lenses of Examples 1 to 3, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 5 (C1) shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 1 to 3, which represent the deviation of different image heights on the imaging plane after light passes through the lens. According to Figure 5 It can be seen that the optical imaging lenses provided in Examples 1 to 3 can achieve good imaging quality.

[0098] Example 4

[0099] Figure 6 A schematic diagram of the optical imaging lens of Embodiment 4 of this application is shown. Figure 6As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0100] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. 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.

[0101] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, a third auxiliary spacer P3b, and a fifth auxiliary spacer P5b. The first spacer P1 is positioned between the first lens E1 and the second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. The fifth spacer element P5 is positioned between the fifth lens E5 and the sixth lens E6, and the object-side surface of the fifth spacer element P5 is at least partially in contact with the image-side surface S10 of the fifth lens E5. The third auxiliary spacer element P3b is positioned on the image-side of the third spacer element P3 and is at least partially in contact with the image-side surface of the third spacer element P3. The fifth auxiliary spacer element P5b is positioned on the image-side of the fifth spacer element P5 and is at least partially in contact with the image-side surface of the fifth spacer element P5.

[0102] In the example, light from the object passes sequentially through surfaces S1 to S12 and is eventually imaged onto the imaging surface (not shown).

[0103] Table 3 shows the basic parameters of the lens group of the optical imaging lens in Example 4, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0104] Table 3

[0105]

[0106] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 4 shows the higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical surface S1 to S12 in Embodiment 4.

[0107] Table 4

[0108]

[0109]

[0110] Example 5

[0111] Figure 7 A schematic diagram of the optical imaging lens of Embodiment 5 of this application is shown. Figure 7 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0112] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, a second auxiliary spacer P2b, a third auxiliary spacer P3b, and a fifth auxiliary spacer P5b. The first spacer P1 is positioned between the first lens E1 and the second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. A fifth spacer element P5 is positioned between a fifth lens E5 and a sixth lens E6, with the object-side surface of the fifth spacer element P5 at least partially in contact with the image-side surface S10 of the fifth lens E5. A second auxiliary spacer element P2b is positioned on the image-side of the second spacer element P2 and at least partially in contact with the image-side surface of the second spacer element P2. A third auxiliary spacer element P3b is positioned on the image-side of the third spacer element P3 and at least partially in contact with the image-side surface of the third spacer element P3. A fifth auxiliary spacer element P5b is positioned on the image-side of the fifth spacer element P5 and at least partially in contact with the image-side surface of the fifth spacer element P5.

[0113] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in embodiment 4. Its basic parameters are detailed in Tables 3 and 4, and will not be repeated here.

[0114] The difference between this embodiment and embodiment 4 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0115] Example 6

[0116] Figure 8 A schematic diagram of the optical imaging lens of Embodiment 6 of this application is shown. Figure 8 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0117] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, a second auxiliary spacer P2b, and a fifth auxiliary spacer P5b. The first spacer P1 is positioned between the first lens E1 and the second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. The fifth spacer element P5 is positioned between the fifth lens E5 and the sixth lens E6, with the object-side surface of the fifth spacer element P5 at least partially in contact with the image-side surface S10 of the fifth lens E5. The second auxiliary spacer element P2b is positioned on the image-side of the second spacer element P2 and at least partially in contact with the image-side surface of the second spacer element P2. The fifth auxiliary spacer element P5b is positioned on the image-side of the fifth spacer element P5 and at least partially in contact with the image-side surface of the fifth spacer element P5.

[0118] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in embodiment 4. Its basic parameters are detailed in Tables 3 and 4, and will not be repeated here.

[0119] The difference between this embodiment and embodiment 4 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0120] Figure 9 (A2) shows the on-axis chromatic aberration curves of the optical imaging lenses of Examples 4 to 6, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 9 (B2) shows the astigmatism curves of the optical imaging lenses of Examples 4 to 6, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 9 (C2) shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 4 to 6, which represent the deviation of different image heights on the imaging plane after light passes through the lens. According to Figure 9 It can be seen that the optical imaging lenses provided in Examples 4 to 6 can achieve good imaging quality.

[0121] Example 7

[0122] Figure 10 A schematic diagram of the optical imaging lens of Embodiment 7 of this application is shown. Figure 10As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3.

[0123] 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 negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. 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.

[0124] The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a fifth spacer P5, a third auxiliary spacer P3b, and a fifth auxiliary spacer P5b. The first spacer P1 is positioned between the first lens E1 and the second lens E2, with its object-side surface at least partially contacting the image-side surface S2 of the first lens E1. The second spacer P2 is positioned between the second lens E2 and the third lens E3, with its object-side surface at least partially contacting the image-side surface S4 of the second lens E2. The third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with its object-side surface at least partially contacting the image-side surface S6 of the third lens E3. The fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with its object-side surface at least partially contacting the image-side surface S8 of the fourth lens E4. The fifth spacer element P5 is positioned between the fifth lens E5 and the sixth lens E6, and the object-side surface of the fifth spacer element P5 is at least partially in contact with the image-side surface S10 of the fifth lens E5. The third auxiliary spacer element P3b is positioned on the image-side of the third spacer element P3 and is at least partially in contact with the image-side surface of the third spacer element P3. The fifth auxiliary spacer element P5b is positioned on the image-side of the fifth spacer element P5 and is at least partially in contact with the image-side surface of the fifth spacer element P5.

[0125] In the example, light from the object passes sequentially through surfaces S1 to S12 and is eventually imaged onto the imaging surface (not shown).

[0126] Table 5 shows the basic parameters of the lens group of the optical imaging lens in Example 7, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0127] Table 5

[0128]

[0129] In this embodiment, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 6 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical surface S1 to S12 in Embodiment 7.

[0130] Table 6

[0131]

[0132]

[0133] Example 8

[0134] Figure 11 A schematic diagram of the optical imaging lens of Embodiment 8 of this application is shown. Figure 11 As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3. The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a third auxiliary spacer element P3b, and a fifth auxiliary spacer element P5b.

[0135] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in embodiment 7. Its basic parameters are detailed in Tables 5 and 6, and will not be repeated here.

[0136] The difference between this embodiment and embodiment 7 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0137] Example 9

[0138] Figure 12 A schematic diagram of the optical imaging lens of Embodiment 9 of this application is shown. Figure 12As shown, the optical imaging lens includes a lens barrel, a six-element lens group disposed within the lens barrel, and a spacer element group. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: 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 aperture stop STO (not shown) is disposed between the second lens E2 and the third lens E3. The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a fifth spacer element P5, a third auxiliary spacer element P3b, and a fifth auxiliary spacer element P5b.

[0139] The six-element lens group of the optical imaging lens in this embodiment has the same structure as the six-element lens group of the optical imaging lens in embodiment 7. Its basic parameters are detailed in Tables 5 and 6, and will not be repeated here.

[0140] The difference between this embodiment and embodiment 7 is that at least some of the components in the lens barrel and spacer element group have different structural dimensions.

[0141] Figure 13 (A3) shows the on-axis chromatic aberration curves of the optical imaging lenses of Examples 7 to 9, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 13 (B3) shows the astigmatism curves of the optical imaging lenses of Examples 7 to 9, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 13 (C3) shows the magnification chromatic aberration curves of the optical imaging lenses of Examples 7 to 9, which represent the deviation of different image heights on the imaging plane after light passes through the lens. According to Figure 13 It can be seen that the optical imaging lenses provided in Examples 7 to 9 can achieve good imaging quality.

[0142] Table 7 provides the parameter values ​​for f, f1, f2, f3, f4, f5, f6, SAG31, and SAG12 for each of Examples 1 to 9. All parameters listed in Table 7 are in millimeters (mm).

[0143] Table 7

[0144]

[0145] Table 8 provides the parameter values ​​for at least some of the elements in the lens barrel and spacer element group of each embodiment from Embodiment 1 to Embodiment 9. Some of these parameters can be determined according to... Figure 1 The measurements were obtained using the annotation method shown, and the units of the parameters listed in Table 8 are all millimeters (mm).

[0146] Table 8

[0147] Parameters / Examples 1 2 3 4 5 6 7 8 9 d1s 3.4315 3.5020 3.4762 4.1324 4.1094 4.1107 3.5529 3.5770 3.5800 D1s 7.6000 7.4494 7.3959 7.4287 7.4547 8.2480 6.9414 5.3488 8.0177 D1m 7.6000 7.4494 7.3959 7.4287 7.4547 8.2480 6.9414 5.3488 8.0177 d2s 3.1827 4.5650 3.1597 4.5270 4.7787 4.6795 3.4109 3.4086 3.4004 d2m 3.1827 3.7370 3.1997 3.1206 3.1674 3.2714 3.4109 3.4086 3.4004 D2s 7.7000 7.1071 7.5874 6.9614 6.9359 7.5610 7.0414 7.5865 8.1177 d3m 5.3781 5.6132 5.4005 4.9421 4.9045 5.0396 5.6244 6.3291 5.1479 D3m 6.9887 7.0796 7.1910 7.2930 7.2870 8.2724 6.7181 7.6561 7.6262 d5s 5.8329 5.6577 5.6110 6.0057 5.4914 5.3523 6.2433 5.6815 6.3705 D5s 7.6637 8.0902 8.4883 7.3464 7.8468 8.0620 8.8130 8.9810 8.0256 d0s 7.1459 7.2453 7.3997 7.7843 8.3709 8.8905 8.4369 9.0039 10.4980 d0m 10.2460 10.0646 9.8169 9.8023 9.4365 9.8092 10.2302 10.4085 10.9464 CP2 0.0220 0.5274 0.0220 1.0044 1.0037 1.1002 0.0210 0.0220 0.0200 CP3 1.9000 1.9124 1.8394 1.1018 0.5841 1.1641 2.2299 2.1276 2.2289 EP45 2.2065 2.1893 / / / 2.2073 1.7477 2.1094 / CP5 1.3335 1.3010 1.2306 1.1681 0.8743 0.8799 1.7854 1.2124 1.8360 CP1 0.022 0.018 0.022 0.016 0.016 0.022 0.022 0.016 0.022

[0148] In summary, the optical imaging lenses in Examples 1 to 9 satisfy the relationships shown in Table 9.

[0149] Table 9

[0150] Conditional / Example 1 2 3 4 5 6 7 8 9 CP3 / T34 2.4079 2.4237 2.3312 6.1825 3.2778 6.5322 2.1836 2.0834 2.1826 d2m / CT3 1.2695 1.4906 1.2763 0.8450 0.8576 0.8858 1.3452 1.3443 1.3410 CT4 / T45 44.6945 44.6945 44.6945 30.1349 30.1349 30.1349 41.7405 41.7405 41.7405 d3m / CT4 2.4690 2.5769 2.4793 3.0425 3.0193 3.1025 2.4712 2.7808 2.2618 f6 / (CP5+CT6) 2.8931 2.9237 2.9923 4.1222 4.6320 4.6211 2.7181 3.2471 2.6795 f2 / (D2s-d2s) -4.6028 -8.1791 -4.6959 -9.2104 -10.3940 -7.7813 -6.0857 -5.2883 -4.6836 T56 / T45 20.7454 20.7454 20.7454 17.2857 17.2857 17.2857 19.3798 19.3798 19.3798 CP5 / T45 27.3605 26.6950 25.2500 21.6705 16.2200 16.3237 32.7431 22.2346 33.6711 D1m / R3 -2.8903 -2.8330 -2.8127 -3.3803 -3.3922 -3.7532 -2.5453 -1.9613 -2.9400 f2 / R4 5.4631 5.4631 5.4631 7.5573 7.5573 7.5573 5.7480 5.7480 5.7480 (D1s-d1s) / (D2s-d2s) 0.9228 1.5528 0.8853 1.3541 1.5508 1.4358 0.9333 0.4241 0.9407 (CT2+CP2) / T23 14.6887 21.3263 14.6887 4.9991 4.9971 5.2647 34.4774 34.5107 34.4441 (T56+CP5) / T45 48.0898 47.4244 45.9793 38.9558 33.5053 33.6090 52.1139 41.6055 53.0419 d0m / d0s 1.4338 1.3891 1.3267 1.2592 1.1273 1.1033 1.2126 1.1560 1.0427 f3 / (CT3-CP3) 8.0875 8.2568 7.3538 1.4889 1.2410 1.5256 16.9358 12.6899 16.8806 D3m / f4 1.4930 1.5124 1.5362 1.0934 1.0925 1.2402 1.4903 1.6984 1.6918 f5 / CP5 -2.8418 -2.9127 -3.0793 -3.2433 -4.3331 -4.3056 -2.1868 -3.2203 -2.1265 R5 / d2m 1.8970 1.6156 1.8869 1.1931 1.1754 1.1381 1.9942 1.9956 2.0004 SAG31 / T23 2.6973 2.6973 2.6973 0.7520 0.7520 0.7520 7.1481 7.1481 7.1481 EP45 / CT5 2.5031 2.4836 / / / 2.7363 2.0696 2.4979 / (D5s-d5s) / T56 1.8122 2.4077 2.8480 1.4390 2.5279 2.9082 2.4329 3.1238 1.5670 SAG12 / (CT1+CP1) 1.5140 1.5140 1.5140 2.0101 2.0101 2.0101 1.5854 1.5854 1.5854

[0151] This application also provides an electronic device equipped with the optical imaging lens described above. The electronic device can be a wearable device such as a VR headset, smartwatch, or smart glasses; a standalone imaging device such as a digital camera; or a mobile electronic device such as a mobile phone or tablet.

[0152] 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, Comprising: A lens group, which is composed of 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. Among them, the central thickness of the third lens on the optical axis is greater than the central thickness of any one of the lenses in the lens group except the third lens on the optical axis; An interval element group, including a second interval element and a third interval element. The second interval element is placed between the second lens and the third lens and contacts the image side surface of the second lens. The third interval element is placed between the third lens and the fourth lens and contacts the image side surface of the third lens; and A lens barrel, which houses the lens group and the interval element group; The optical imaging lens satisfies: 2.08 < CP3 / T34 < 6.54 and 0.84 < d2m / CT3 < 1.50; Where, CP3 is the maximum thickness of the third interval element along the optical axis direction, T34 is the interval distance between the third lens and the fourth lens on the optical axis, d2m is the inner diameter of the image side surface of the second interval element, and CT3 is the central thickness of the third lens on the optical axis.

2. The optical imaging lens according to claim 1, characterized in that, The interval element group further includes a fifth interval element, which is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 2.67 < f6 / (CP5+CT6) < 4.64 and -4.34 < f5 / CP5 < -2.12, where f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, CP5 is the maximum thickness of the fifth interval element along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis.

3. The optical imaging lens according to claim 1, characterized in that, The interval element group further includes a fifth interval element, which is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 17.28 < T56 / T45 < 20.75 and 16.21 < CP5 / T45 < 33.68, where T45 is the interval distance between the fourth lens and the fifth lens on the optical axis, T56 is the interval distance between the fifth lens and the sixth lens on the optical axis, and CP5 is the maximum thickness of the fifth interval element along the optical axis direction.

4. The optical imaging lens according to claim 1, characterized in that, The interval element group further includes a fifth interval element, which is placed between the fifth lens and the sixth lens and contacts the image side surface of the fifth lens; The optical imaging lens satisfies: 1.43 < (D5s-d5s) / T56 < 3.13, where D5s is the outer diameter of the object side surface of the fifth interval element, d5s is the inner diameter of the object side surface of the fifth interval element, and T56 is the interval distance between the fifth lens and the sixth lens on the optical axis.

5. The optical imaging lens according to claim 1, characterized in that, The interval element group further includes a first interval element, which is placed between the first lens and the second lens and contacts the image side surface of the first lens; The optical imaging lens satisfies: -3.76 < D1m / R3 < -1.96 and 5.46 < f2 / R4 < 7.56, where D1m is the outer diameter of the image side of the first spacer element, R3 is the curvature radius of the object side of the second lens, R4 is the curvature radius of the image side of the second lens, and f2 is the effective focal length of the second lens.

6. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; The optical imaging lens satisfies: 0.42 < (D1s - d1s) / (D2s - d2s) < 1.56, where D1s is the outer diameter of the object side of the first spacer element, d1s is the inner diameter of the object side of the first spacer element, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

7. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; The optical imaging lens satisfies: 1.51 < SAG12 / (CT1 + CP1) < 2.05, where SAG12 is the axial distance between the intersection of the image side of the first lens and the optical axis and the vertex of the effective radius of the image side of the first lens, CT1 is the central thickness of the first lens on the optical axis, and CP1 is the maximum thickness of the first spacer element along the optical axis direction.

8. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element and a fifth spacer element. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image side of the fourth lens, and the fifth spacer element is disposed between the fifth lens and the sixth lens and contacts the image side of the fifth lens; The optical imaging lens satisfies: 2.06 < EP45 / CT5 < 2.74, where EP45 is the distance along the optical axis between the image side of the fourth spacer element and the object side of the fifth spacer element, and CT5 is the central thickness of the fifth lens on the optical axis.

9. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 30.13 < CT4 / T45 < 44.70 and 2.26 < d3m / CT4 < 3.11, where CT4 is the central thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and d3m is the inner diameter of the image side of the third spacer element.

10. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: -10.40 < f2 / (D2s - d2s) < -4.60, where f2 is the effective focal length of the second lens, D2s is the outer diameter of the object side of the second spacer element, and d2s is the inner diameter of the object side of the second spacer element.

11. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 4.99 < (CT2 + CP2) / T23 < 34.52, where CT2 is the central thickness of the second lens on the optical axis, CP2 is the maximum thickness of the second spacer element along the optical axis direction, and T23 is the spacing distance between the second lens and the third lens on the optical axis.

12. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 1.04 < d0m / d0s < 1.44, where d0m is the inner diameter of the image-side end face of the lens barrel, and d0s is the inner diameter of the object-side end face of the lens barrel.

13. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 1.24 < f3 / (CT3 - CP3) < 16.94, where f3 is the effective focal length of the third lens.

14. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 1.13 < R5 / d2m < 2.10 and 0.75 < SAG31 / T23 < 7.15, where R5 is the curvature radius of the object-side surface of the third lens, SAG31 is the axial distance between the intersection of the object-side surface of the third lens and the optical axis and the vertex of the effective radius of the object-side surface of the third lens, and T23 is the spacing distance between the second lens and the third lens on the optical axis.

15. The optical imaging lens according to any one of claims 1-8, characterized in that, The optical imaging lens satisfies: 1.09 < D3m / f4 < 1.70, where D3m is the outer diameter of the image-side surface of the third spacer element, and f4 is the effective focal length of the fourth lens.

Images