Optical imaging lens

Abstract

The application discloses an optical imaging lens, which comprises a lens barrel assembly, an imaging lens group and a spacer group. The imaging lens group comprises a first lens group and a second lens group. The first lens group comprises a first lens, a second lens and a third lens. The second lens group comprises a fourth lens, a fifth lens and a sixth lens. The spacer group comprises a fourth spacer in contact with the image side surface of the fourth lens and a fifth spacer in contact with the image side surface of the fifth lens. The lens barrel assembly comprises a first lens barrel for accommodating the first lens group and a second lens barrel for accommodating the second lens group. The F number FNO of the optical imaging lens satisfies FNO<1.6. The distance L between the object side end surface of the first lens barrel and the image side end surface of the second lens barrel in the direction of the optical axis and the total effective focal length f of the optical imaging lens satisfy 1.4<L / f<1.7. The inner diameter d4m of the image side surface of the fourth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the refractive index N4 of the fourth lens and the refractive index N5 of the fifth lens satisfy 14.5<(d5m / d4m) / (N5-N4)<55.2.

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 popularization of portable electronic products such as mobile phones and tablet computers, more new requirements have been put forward for the imaging functions of portable electronic products. For example, the imaging lenses of portable electronic products need to meet the characteristics of large aperture and long focal length.

[0003] In order to enable a six-piece imaging lens to simultaneously achieve the characteristics of large aperture and long focal length, the volume of the lens group close to the image side of the imaging lens is smaller than that of the lens group close to the image side of the imaging lens, and there are problems such as the aperture of the lens in the lens group close to the image side being small and the deflection angle of the lens for light being large. This will cause the effective light rays at the edge to be easily refracted to the non-effective parts of these lenses, resulting in stray light and seriously affecting the imaging quality of the imaging lens. 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] One aspect of this application provides such an optical imaging lens, which includes a lens barrel assembly, an imaging lens group and a spacer group disposed in the lens barrel assembly. The imaging lens group includes a first lens group and a second lens group arranged in sequence from the object side to the image side along the optical axis. The first lens group includes a first lens, a second lens, and a third lens arranged in sequence from the object side to the image side along the optical axis. The second lens group includes 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 refractive index of the fifth lens is greater than that of any one of the fourth lens and the sixth lens; the spacer group includes a fourth spacer disposed on the image side surface of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer disposed on the image side surface of the fifth lens and in contact with the image side surface of the fifth lens; the lens barrel assembly includes a first lens barrel and a second lens barrel. The first lens barrel houses the first lens group, and the second lens barrel houses the second lens group; wherein, the aperture number FNO of the optical imaging lens satisfies: FNO < 1.6; the distance L between the object side end face of the first lens barrel and the image side end face of the second lens barrel in the direction of the optical axis and the total effective focal length f of the optical imaging lens satisfy: 1.4 < L / f < 1.7; the inner diameter d4m of the image side surface of the fourth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy: 14.5 < (d5m / d4m) / (N5 - N4) < 55.2.

[0006] According to an exemplary embodiment of this application, the distance L between the object-side end face of the first lens barrel and the image-side end face of the second lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 5.5mm <L / f×T34<6.1mm。

[0007] According to an exemplary embodiment of this application, the maximum effective half-aperture DT51 of the object-side surface of the fifth lens, the inner diameter d4s of the object-side surface of the fourth spacer, and the inner diameter d5s of the object-side surface of the fifth spacer satisfy: -13.0 <DT51 / (d4s-d5s)<-4.5。

[0008] According to an exemplary embodiment of this application, the center thickness CT5 of the fifth lens on the optical axis, the spacing EP45 of the fourth and fifth spacers along the optical axis, and the refractive index N5 of the fifth lens satisfy: 2.2 <CT5 / EP45×N5<3.0。

[0009] According to an exemplary embodiment of this application, the inner diameter d4s of the object side of the fourth spacer, the outer diameter D4s of the object side of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis and the maximum thickness CP4 of the fourth spacer satisfy: 5.0 < (D4s-d4s) / (T45-CP4) < 8.0.

[0010] According to an exemplary embodiment of this application, the inner diameter d5s of the object side of the fifth spacer, the outer diameter D5s of the object side of the fifth spacer, the air gap T56 between the fifth lens and the sixth lens on the optical axis and the maximum thickness CP5 of the fifth spacer satisfy: 5.2 < (D5s-d5s) / (T56-CP5) < 7.0.

[0011] According to an exemplary embodiment of this application, the effective focal length F2 of the second lens group, the effective focal length f5 of the fifth lens, and the spacing EP45 between the fourth and fifth spacers along the optical axis satisfy: -1.5mm. <F2 / f5×EP45<0mm。

[0012] According to an exemplary embodiment of this application, the inner diameter d4m of the image-side surface of the fourth spacer, the radius of curvature R8 of the image-side surface of the fourth lens, and the radius of curvature R9 of the object-side surface of the fifth lens satisfy: -10.5 <d4m / (R8-R9)<9.0。

[0013] According to an exemplary embodiment of this application, the inner diameter d5m of the image-side surface of the fifth spacer, the radius of curvature R10 of the image-side surface of the fifth lens, and the radius of curvature R11 of the object-side surface of the sixth lens satisfy: -1.5 <d5m / (R10-R11)<0.1。

[0014] According to an exemplary embodiment of the present application, the outer diameter D4m of the image side of the fourth spacer, the outer diameter D5s of the object side of the fifth spacer, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens satisfy: -5.5 < D4m / R9 + R10 / D5s < 6.5.

[0015] According to an exemplary embodiment of the present application, the effective focal length F1 of the first lens group and the length L1 of the first lens barrel in the direction of the optical axis satisfy: 1.0 < F1 / L1 < 1.3, and the effective focal length F2 of the second lens group and the length L2 of the second lens barrel in the direction of the optical axis satisfy: -3.0 < F2 / L2 < -2.5.

[0016] According to an exemplary embodiment of the present application, the inner diameter d02s of the object-side end face of the second lens barrel, the effective focal length f4 of the fourth lens, and the refractive index N4 of the fourth lens satisfy: -1.8 < d02s / (f4 / N4) < -1.0.

[0017] According to an exemplary embodiment of the present application, the inner diameter d01m of the image-side end face of the first lens barrel, the inner diameter d02s of the object-side end face of the second lens barrel, the maximum effective semi-aperture DT32 of the image side of the third lens, and the maximum effective semi-aperture DT41 of the object side of the fourth lens satisfy: 1.8 < (d01m - d02s) / (DT32 - DT41) < 3.3.

[0018] According to an exemplary embodiment of the present application, the spacer group further includes a first spacer disposed on the image side of the first lens and in contact with the image side of the first lens, and a first auxiliary spacer disposed on the image side of the first spacer and in contact with the image side of the first spacer. The effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens, the maximum thickness CP1b of the first auxiliary spacer, and the maximum thickness CP4 of the fourth spacer satisfy: -34.0 < f4 / CP4 / (f1 / CP1b) < -6.9.

[0019] According to an exemplary embodiment of the present application, the air gap between the third lens and the fourth lens on the optical axis is variable, and the variable is less than 3 mm.

[0020] The optical imaging lens provided by the present application includes two lens barrels. By reasonably allocating each lens and reasonably setting the refractive index of the fifth lens, the characteristics of large aperture and long focal length of the optical imaging lens can be achieved. For example, FNO < 1.6 and 1.4 < L / f < 1.7. In this case, due to the limitation of the lens barrel volume, there will be more stray light generated by the spacer, and the volume of the second lens group is smaller than that of the first lens group. The refractive index of the fifth lens in the second lens group is greater than that of the adjacent lens, and the deflection angle of light at the fifth lens is larger. The apertures of the fourth lens and the fifth lens are smaller than those of the lenses in the first lens group, and they are closer to the effective light at the edge. Therefore, by reasonably configuring the refractive indices of the fourth lens and the fifth lens and the inner diameters of the image sides of the fourth spacer and the fifth spacer, the refraction path of light passing through the fourth lens and the fifth lens can be adjusted. Without affecting the optical performance, it can ensure that the refraction focal length of light will not be too large, and at the same time, the spacer can be used to block the excess light at the edge position, reducing the stray light generated by the light hitting the lens mechanism part. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 apparent, wherein:

[0022] Figure 1 FIG. shows the parameter schematic diagram of the optical imaging lens according to the present application;

[0023] Figure 2 FIG. shows the stray light spot diagram of the optical imaging lens when FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 13.0;

[0024] Figure 3 FIG. shows the stray light spot diagram of the optical imaging lens when FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 20.0;

[0025] Figure 4 [[ID=二十一]]FIG. shows the stray light spot diagram of the optical imaging lens when FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 57.0; [[ID=二十二]] [[ID=二十三]]

[0026] [[ID=二十四]] Figure 5 [[ID=二十五]]FIG. shows the structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application; [[ID=二十六]] [[ID=二十七]]

[0027] [[ID=二十八]]<000009... [[ID=二十九]]FIG. shows the structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application; [[ID=三十]] [[ID=三十一]]

[0028] [[ID=三十二]] Figure 7 [[ID=三十三]]FIG. shows the structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application; [[ID=三十四]] [[ID=三十五]]

[0029] Figures 8A to 8C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 1, 2, or 3 of this application are shown respectively.

[0030] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0031] Figure 10 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0032] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0033] Figures 12A to 12C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 4, 5, or 6 of this application are shown respectively.

[0034] Figure 13 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0035] Figure 14 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0036] Figure 15 A schematic diagram of the structure of an optical imaging lens according to Embodiment 9 of this application is shown; and

[0037] Figures 16A to 16C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 7, 8, or 9 of this application are shown respectively. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The features, principles and other aspects of this application are described in detail below.

[0046] Figure 1 This is a structural layout diagram and a schematic diagram of some parameters of an optical imaging lens according to an exemplary embodiment of this application. (Reference) Figure 1d4s represents the inner diameter of the object side of the fourth spacer, D4s represents the outer diameter of the object side of the fourth spacer, d4m represents the inner diameter of the image side of the fourth spacer, D4m represents the outer diameter of the image side of the fourth spacer, d5s represents the inner diameter of the object side of the fifth spacer, D5s represents the outer diameter of the object side of the fifth spacer, d5m represents the inner diameter of the image side of the fifth spacer, d01m represents the inner diameter of the image side end face of the first lens tube, d02s represents the inner diameter of the object side end face of the second lens tube, CP4 represents the maximum thickness of the fourth spacer, EP45 represents the spacing between the fourth and fifth spacers along the optical axis, CP5 represents the maximum thickness of the fifth spacer, CP1b represents the maximum thickness of the first auxiliary spacer, L represents the distance between the object side end face of the first lens tube and the image side end face of the second lens tube in the direction of the optical axis, L1 represents the length of the first lens tube in the direction of the optical axis, and L2 represents the length of the second lens tube in the direction of the optical axis.

[0047] refer to Figures 5 to 7 , Figures 9 to 11 as well as Figures 13 to 15 The first aspect of this application provides an optical imaging lens that may include an imaging lens group. The imaging lens group may include a first lens group and a second lens group arranged sequentially along the optical axis from the object side to the image side. The first lens group includes a first lens, a second lens, and a third lens arranged sequentially along the optical axis from the object side to the image side. The second lens group includes a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side. An air gap may exist between any two adjacent lenses in the first to sixth lenses. As an example, the first, third, and fifth lenses may have positive optical power, while the second, fourth, and sixth lenses may have negative optical power. As an example, the air gap between the third and fourth lenses along the optical axis is variable, and the variable is less than 3 mm. By changing the spacing between the first and second lens groups, zoom of the optical imaging lens can be achieved, thereby allowing the optical imaging lens to obtain a wider field of view compared to a fixed-focus lens, making it suitable for shooting in more scenarios.

[0048] In an exemplary embodiment, the optical imaging lens may further include a spacer group, which may include one or more of a first spacer, a first auxiliary spacer, a second spacer, a fourth spacer, and a fifth spacer. The first spacer is disposed on the image side surface of the first lens and at least partially contacts the image side surface of the first lens. The first auxiliary spacer is disposed on the image side surface of the first spacer and at least partially contacts the image side surface of the first spacer. The second spacer is disposed on the image side surface of the second lens and at least partially contacts the image side surface of the second lens. The fourth spacer is disposed on the image side surface of the fourth lens and at least partially contacts the image side surface of the fourth lens. The fifth spacer is disposed on the image side surface of the fifth lens and at least partially contacts the image side surface of the fifth lens. Reasonable use of spacers can effectively avoid the risk of stray light, reduce the interference to the image quality, and thus improve the imaging quality of the optical imaging lens.

[0049] In an exemplary embodiment, the optical imaging lens may further include a barrel assembly, and the imaging lens group and the spacer group are disposed within the barrel assembly. The barrel assembly may include a first barrel and a second barrel. The first barrel houses the first lens group. The second barrel houses the second lens group.

[0050] In an exemplary embodiment, the refractive index of the fifth lens is greater than that of any one of the fourth lens and the sixth lens. The aperture number FNO of the optical imaging lens may satisfy: FNO < 1.6. The distance L between the object-side end surface of the first barrel and the image-side end surface of the second barrel in the direction of the optical axis and the total effective focal length f of the optical imaging lens may satisfy: 1.4 < L / f < 1.7. The inner diameter d4m of the image side surface of the fourth spacer, the inner diameter d5m of the image side surface of the fifth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens may satisfy: 14.5 < (d5m / d4m) / (N5 - N4) < 55.2. By reasonably allocating each lens and reasonably setting the refractive index of the fifth lens, the optical imaging lens provided in the present application can achieve the characteristics of a large aperture and a long focal length of the optical imaging lens. For example, FNO < 1.6, 1.4 < L / f < 1.7. In this case, due to the limitation of the barrel volume, there will be more stray light generated by the spacers. Moreover, the volume of the second lens group is smaller than that of the first lens group, the refractive index of the fifth lens in the second lens group is greater than that of the adjacent lens, the deflection angle of the light at the fifth lens is larger, the apertures of the fourth lens and the fifth lens are smaller than those of the lenses in the first lens group, and they are closer to the effective light at the edge. Therefore, by reasonably configuring the refractive indices of the fourth lens and the fifth lens and the inner diameters of the image side surfaces of the fourth spacer and the fifth spacer, the refraction path of the light passing through the fourth lens and the fifth lens can be adjusted. Without affecting the optical performance, it can ensure that the refraction focal length of the light is not too large. At the same time, the spacers can also block the excess light at the edge position, reducing the stray light generated by the light hitting the lens mechanism part (i.e., the non-effective diameter part).

[0051] Figure 2 It is the stray light spot diagram when the optical imaging lens is at FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 13.0. Figure 3 It is the stray light spot diagram when the optical imaging lens is at FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 20.0. Figure 4 It is the stray light spot diagram when the optical imaging lens is at FNO = 1.4 and (d5m / d4m) / (N5 - N4) = 57.0. From Figure 2 、 Figure 3 and Figure 4 it can be seen that when (d5m / d4m) / (N5 - N4) = 13.0 or (d5m / d4m) / (N5 - N4) = 57.0, the optical imaging lens has strong stray light, while when (d5m / d4m) / (N5 - N4) = 20.0, the stray light phenomenon of the optical imaging lens is significantly improved. It can be seen that by making (d5m / d4m) / (N5 - N4) within the range of 14.5 to 55.2, the stray light phenomenon of the optical imaging lens can be effectively improved.

[0052] In an exemplary embodiment, the distance L between the object - side end face of the first lens barrel and the image - side end face of the second lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens, and the air gap T34 between the third lens and the fourth lens on the optical axis can satisfy: 5.5mm < L / f×T34 < 6.1mm. Reasonably controlling the mutual relationship among the distance between the object - side end face of the first lens barrel and the image - side end face of the second lens barrel in the direction of the optical axis, the total effective focal length of the optical imaging lens, and the air gap between the third lens and the fourth lens on the optical axis can increase the rationality of the spacing arrangement between lens groups, reduce the gap sensitivity of the optical imaging lens, and improve the performance of the optical imaging lens.

[0053] In an exemplary embodiment, the maximum effective semi - aperture DT51 of the object - side surface of the fifth lens, the inner diameter d4s of the object - side surface of the fourth spacer, and the inner diameter d5s of the object - side surface of the fifth spacer can satisfy: - 13.0 < DT51 / (d4s - d5s) < - 4.5. Reasonably controlling the mutual relationship among the maximum effective semi - aperture of the object - side surface of the fifth lens and the inner diameters of the object - side surfaces of the fourth and fifth spacers can use the fourth and fifth spacers to block excess stray light and avoid light leakage problems in the optical imaging lens.

[0054] In an exemplary embodiment, the central thickness CT5 of the fifth lens on the optical axis, the spacing EP45 between the fourth spacer and the fifth spacer along the optical axis, and the refractive index N5 of the fifth lens may satisfy: 2.2 < CT5 / EP45 × N5 < 3.0. By reasonably controlling the relationship among the central thickness of the fifth lens on the optical axis, the spacing between the fourth spacer and the fifth spacer along the optical axis, and the refractive index of the fifth lens, the central thickness and the edge thickness of the fifth lens can be respectively constrained within a reasonable range, improving the processability and assembly stability of the fifth lens and reducing the influence of the later deformation of the fifth lens on the performance of the optical imaging lens.

[0055] In an exemplary embodiment, the inner diameter d4s of the object side surface of the fourth spacer, the outer diameter D4s of the object side surface of the fourth spacer, the air spacing T45 between the fourth lens and the fifth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer may satisfy: 5.0 < (D4s - d4s) / (T45 - CP4) < 8.0. By reasonably controlling the relationship among the inner and outer diameters of the object side surface of the fourth spacer, the air spacing between the fourth lens and the fifth lens on the optical axis, and the maximum thickness of the fourth spacer, the outer diameter of the object side surface of the fourth spacer can be reduced while ensuring the assembly stability, thereby reducing the outer diameter and cost of the lens barrel assembly and improving the market competitiveness of the optical imaging lens.

[0056] In an exemplary embodiment, 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, the air spacing T56 between the fifth lens and the sixth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer may satisfy: 5.2 < (D5s - d5s) / (T56 - CP5) < 7.0. By reasonably controlling the relationship among the inner and outer diameters of the object side surface of the fifth spacer, the air spacing between the fifth lens and the sixth lens on the optical axis, and the maximum thickness of the fifth spacer, the gradient of the increase in the outer diameter of the fifth spacer can be reduced while ensuring the assembly stability, thereby reducing the outer diameter and cost of the lens barrel assembly and improving the market competitiveness of the optical imaging lens.

[0057] In an exemplary embodiment, the effective focal length F2 of the second lens group, the effective focal length f5 of the fifth lens, and the spacing EP45 between the fourth spacer and the fifth spacer along the optical axis may satisfy: -1.5 mm < F2 / f5 × EP45 < 0 mm. By reasonably controlling the relationship among the effective focal length of the second lens group, the effective focal length of the fifth lens, and the spacing between the fourth spacer and the fifth spacer along the optical axis, the thickness of the mechanical part (i.e., the non-effective diameter part) of the fifth lens can be constrained within a certain range, ensuring the strength and assembly stability of the fifth lens.

[0058] In an exemplary embodiment, the inner diameter d4m of the image side of the fourth spacer, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R9 of the object side of the fifth lens may satisfy: -10.5 < d4m / (R8 - R9) < 9.0. By reasonably controlling the mutual relationship among the inner diameter of the image side of the fourth spacer, the radius of curvature of the image side of the fourth lens, and the radius of curvature of the object side of the fifth lens, it is possible to block excessive stray light using the fourth spacer without affecting the marginal rays of the system, thereby improving the imaging quality of the optical imaging lens.

[0059] In an exemplary embodiment, the inner diameter d5m of the image side of the fifth spacer, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens may satisfy: -1.5 < d5m / (R10 - R11) < 0.1. By reasonably controlling the mutual relationship among the inner diameter of the image side of the fifth spacer, the radius of curvature of the image side of the fifth lens, and the radius of curvature of the object side of the sixth lens, it is possible to block excessive stray light using the fifth spacer without affecting the marginal rays of the system, thereby improving the imaging quality of the optical imaging lens.

[0060] In an exemplary embodiment, the outer diameter D4m of the image side of the fourth spacer, the outer diameter D5s of the object side of the fifth spacer, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens may satisfy: -5.5 < D4m / R9 + R10 / D5s < 6.5. By reasonably controlling the mutual relationship among the outer diameter of the image side of the fourth spacer, the outer diameter of the object side of the fifth spacer, and the radii of curvature of the object side and image side of the fifth lens, it is possible to ensure the rationality of the outer diameters of the fourth and fifth spacers, avoid deformation of the spacers due to excessive outer diameters in a high-temperature and high-humidity environment, and thus avoid field curvature variation of the optical imaging lens caused by spacer deformation, improving the reliability of the optical imaging lens.

[0061] In an exemplary embodiment, the effective focal length F1 of the first lens group and the length L1 of the first lens barrel in the direction of the optical axis may satisfy: 1.0 < F1 / L1 < 1.3, and the effective focal length F2 of the second lens group and the length L2 of the second lens barrel in the direction of the optical axis may satisfy: -3.0 < F2 / L2 < -2.5. By respectively constraining the ratio of the effective focal length of the first lens group to the length of the first lens barrel in the direction of the optical axis and the ratio of the effective focal length of the second lens group to the length of the second lens barrel in the direction of the optical axis within reasonable ranges, it is possible to reasonably distribute the optical power of the optical imaging lens, effectively reduce the sensitivity of the optical imaging lens while ensuring good imaging quality of the optical imaging lens, and improve the optical performance and assembly yield of the optical imaging lens.

[0062] In an exemplary embodiment, the inner diameter d02s of the object-side end face of the second lens barrel, the effective focal length f4 of the fourth lens, and the refractive index N4 of the fourth lens may satisfy: -1.8 < d02s / (f4 / N4) < -1.0. By reasonably controlling the relationship among the inner diameter of the object-side end face of the second lens barrel, the effective focal length of the fourth lens, and the refractive index of the fourth lens, it is possible to ensure the distance between the sharp corner of the lens barrel assembly and the light system, so that the light can be well refracted at the position of the fourth lens after entering the fourth lens from the object-side end face of the second lens barrel, which is beneficial to the large-aperture characteristic of the optical imaging lens.

[0063] In an exemplary embodiment, the inner diameter d01m of the image-side end face of the first lens barrel, the inner diameter d02s of the object-side end face of the second lens barrel, the maximum effective semi-aperture DT32 of the image-side surface of the third lens, and the maximum effective semi-aperture DT41 of the object-side surface of the fourth lens may satisfy: 1.8 < (d01m - d02s) / (DT32 - DT41) < 3.3. The air gap between the third lens and the fourth lens is the transition gap between the two lens groups. When the radial step difference of the lenses is large, it is difficult to adjust the light system. By reasonably controlling the maximum effective semi-aperture of the image-side surface of the third lens and the maximum effective semi-aperture of the object-side surface of the fourth lens, the smoothness of light transmission can be ensured. At the same time, by controlling the inner diameter of the image-side end face of the first lens barrel and the inner diameter of the object-side end face of the second lens barrel, a certain amount of stray light can be blocked when guiding the light into the second lens group, and redundant stray light can be avoided from entering the second lens group.

[0064] In an exemplary embodiment, the effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens, the maximum thickness CP1b of the first auxiliary spacer, and the maximum thickness CP4 of the fourth spacer may satisfy: -34.0 < f4 / CP4 / (f1 / CP1b) < -6.9. The first lens and the fourth lens are the first lenses of the first lens group and the second lens group respectively. By reasonably controlling the relationship among the effective focal length of the first lens, the effective focal length of the fourth lens, the maximum thickness of the first auxiliary spacer, and the maximum thickness of the fourth spacer, the sensitivity of the optical imaging lens can be reduced, the strength stability of the optical imaging lens can be ensured, and the production yield of the optical imaging lens can be improved.

[0065] In an exemplary embodiment, the optical imaging lens further includes an aperture stop, which can be disposed between the object side and the first lens according to actual needs.

[0066] The optical imaging lens according to the above embodiments of this application can employ six lenses and at least one spacer. By rationally allocating the parameters of each lens and spacer, the characteristics of a large aperture and long focal length of the optical imaging lens can be achieved, improving stray light phenomena, assembly stability, and image quality. The optical imaging lens provided by this application further reduces the lens space while satisfying the characteristics of a large aperture and long focal length, making the structure more compact.

[0067] In embodiments of this application, at least one of the surfaces of the first to sixth lenses is an aspherical surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, both the object-side and image-side surfaces of the first to sixth lenses are aspherical surfaces.

[0068] A second aspect of this application provides an optical imaging lens that may include a lens barrel assembly and an imaging lens group. The imaging lens group may include a first lens group and a second lens group arranged sequentially along the optical axis from the object side to the image side. The first lens group includes a first lens, a second lens, and a third lens arranged sequentially along the optical axis from the object side to the image side. The second lens group includes 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 refractive index of the fifth lens is greater than the refractive index of any one of the fourth and sixth lenses. The lens barrel assembly may include a first lens barrel and a second lens barrel, the first lens barrel housing the first lens group and the second lens barrel housing the second lens group.

[0069] The F-number FNO of the optical imaging lens can satisfy: FNO < 1.6. The distance L between the object-side end face of the first lens barrel and the image-side end face of the second lens barrel in the direction of the optical axis and the total effective focal length f of the optical imaging lens can satisfy: 1.4 < L / f < 1.7. The inner diameter d01m of the image-side end face of the first lens barrel, the inner diameter d02s of the object-side end face of the second lens barrel, the maximum effective semi-aperture DT32 of the image-side surface of the third lens, and the maximum effective semi-aperture DT41 of the object-side surface of the fourth lens can satisfy: 1.8 < (d01m - d02s) / (DT32 - DT41) < 3.3. The optical imaging lens provided in this application can achieve the characteristics of a large aperture and a long focal length by reasonably allocating each lens and reasonably setting the refractive index of the fifth lens. For example, FNO < 1.6, 1.4 < L / f < 1.7. The air gap between the third lens and the fourth lens is the transition gap between the two lens groups. When the radial step difference of the lenses is large, it will be difficult to adjust the light system. Therefore, reasonably controlling the maximum effective semi-aperture of the image-side surface of the third lens and the maximum effective semi-aperture of the object-side surface of the fourth lens can ensure the smoothness of light transmission. At the same time, controlling the inner diameter of the image-side end face of the first lens barrel and the inner diameter of the object-side end face of the second lens barrel can block certain stray light when guiding light into the second lens group and avoid unnecessary stray light from entering the second lens group.

[0070] However, those skilled in the art should 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.

[0071] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the drawings.

[0072] Example 1

[0073] The following refers to Figure 5 Describe the optical imaging lens according to Embodiment 1 of this application.

[0074] As Figure 5As shown, the optical imaging lens 100 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0075] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. 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 negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. The filter has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0076] Table 1 shows the basic parameters of the optical imaging lens of Example 1, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0077]

[0078] Table 1

[0079] In this embodiment, the total effective focal length f of the optical imaging lens is 9.75 mm, the entrance pupil diameter EPD of the optical imaging lens is 7.04 mm, the maximum field of view (FOV) of the optical imaging lens is 25.20°, the effective focal length F1 of the first lens group is 8.82 mm, the effective focal length F2 of the second lens group is -9.12 mm, the maximum effective half-aperture (DT32) of the image side of the third lens is 3.14 mm, the maximum effective half-aperture (DT41) of the object side of the fourth lens is 2.38 mm, and the maximum effective half-aperture (DT51) of the object side of the fifth lens is 2.20 mm.

[0080] 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, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0081]

[0082] Where x is the distance vector from the vertex of the aspherical surface at a height of 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, A12 that can be used for each aspherical surface S1-S12 in Example 1. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0083]

[0084]

[0085] Table 2

[0086] Example 2

[0087] The following is for reference Figure 6 Describes an optical imaging lens according to Embodiment 2 of this application.

[0088] like Figure 6As shown, the optical imaging lens 200 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0089] The lens structure in this embodiment is the same as that in Embodiment 1. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0090] Example 3

[0091] The following is for reference Figure 7 Describes an optical imaging lens according to Embodiment 3 of this application.

[0092] like Figure 7As shown, the optical imaging lens 300 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0093] The lens structure in this embodiment is the same as that in Embodiment 1. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 1, and the aspherical coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0094] Figure 8A The on-axis chromatic aberration curves of the optical imaging lenses of Examples 1, 2, and 3 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the optical imaging lenses. Figure 8B The astigmatism curves of the optical imaging lenses of Examples 1, 2, and 3 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different field of view angles. Figure 8C The distortion curves of the optical imaging lenses in Examples 1, 2, and 3 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. According to... Figures 8A to 8C It can be seen that the optical imaging lenses given in Examples 1, 2, and 3 can achieve good imaging quality.

[0095] Example 4

[0096] The following is for reference Figure 9 The optical imaging lens according to Embodiment 4 of this application is described.

[0097] like Figure 9As shown, the optical imaging lens 400 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0098] The first lens E1 has positive 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 convex and its image-side surface S4 being concave. 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 negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive 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. The filter has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0099] Table 3 shows the basic parameters of the optical imaging lens of Example 4, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0100]

[0101] Table 3

[0102] In this embodiment, the total effective focal length f of the optical imaging lens is 9.68 mm, the entrance pupil diameter EPD of the optical imaging lens is 7.09 mm, the maximum field of view (FOV) of the optical imaging lens is 26.00°, the effective focal length F1 of the first lens group is 8.75 mm, the effective focal length F2 of the second lens group is -9.59 mm, the maximum effective half-aperture (DT32) of the image side of the third lens is 3.21 mm, the maximum effective half-aperture (DT41) of the object side of the fourth lens is 2.43 mm, and the maximum effective half-aperture (DT51) of the object side of the fifth lens is 2.22 mm.

[0103] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 4 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical surfaces S1-S12 in Embodiment 4. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0104]

[0105]

[0106] Table 4

[0107] Example 5

[0108] The following is for reference Figure 10 Describes an optical imaging lens according to Embodiment 5 of this application.

[0109] like Figure 10 As shown, the optical imaging lens 500 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0110] The lens structure in this embodiment is the same as that in Embodiment 4. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0111] Example 6

[0112] The following is for reference Figure 11 Describes an optical imaging lens according to Embodiment 6 of this application.

[0113] like Figure 11 As shown, the optical imaging lens 600 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0114] The lens structure in this embodiment is the same as that in Embodiment 4. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 3, and the aspherical coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0115] Figure 12A The on-axis chromatic aberration curves of the optical imaging lenses of Examples 4, 5, and 6 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the optical imaging lenses. Figure 12BThe astigmatism curves of the optical imaging lenses of Examples 4, 5, and 6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different field of view angles. Figure 12C The distortion curves of the optical imaging lenses in Examples 4, 5, and 6 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. According to... Figures 12A to 12C It can be seen that the optical imaging lenses given in Examples 4, 5, and 6 can achieve good imaging quality.

[0116] Example 7

[0117] The following is for reference Figure 13 Describes an optical imaging lens according to Embodiment 7 of this application.

[0118] like Figure 13 As shown, the optical imaging lens 700 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is located within the first lens barrel P01, and the second lens group is located within the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0119] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. 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 negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. The filter has an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged on the imaging surface S15.

[0120] Table 5 shows the basic parameters of the optical imaging lens of Example 7, where the units for radius of curvature, thickness / distance, and focal length are all millimeters (mm).

[0121]

[0122] Table 5

[0123] In this embodiment, the total effective focal length f of the optical imaging lens is 9.97 mm, the entrance pupil diameter EPD of the optical imaging lens is 7.22 mm, the maximum field of view (FOV) of the optical imaging lens is 25.58°, the effective focal length F1 of the first lens group is 8.83 mm, the effective focal length F2 of the second lens group is -9.88 mm, the maximum effective half-aperture (DT32) of the image side of the third lens is 3.22 mm, the maximum effective half-aperture (DT41) of the object side of the fourth lens is 2.44 mm, and the maximum effective half-aperture (DT51) of the object side of the fifth lens is 2.19 mm.

[0124] In this embodiment, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the sixth lens E6, are aspherical. Table 6 shows the higher-order coefficients A4, A6, A8, and A6 that can be used for the aspherical surfaces S1-S12 in Embodiment 7. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0125]

[0126]

[0127] Table 6

[0128] Example 8

[0129] The following is for reference Figure 14 Describes an optical imaging lens according to Embodiment 8 of this application.

[0130] like Figure 14As shown, the optical imaging lens 800 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is placed inside the first lens barrel P01, and the second lens group is placed inside the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better support the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0131] The lens structure in this embodiment is the same as that in Embodiment 7. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0132] Example 9

[0133] The following is for reference Figure 15 Describes an optical imaging lens according to Embodiment 9 of this application.

[0134] like Figure 15As shown, the optical imaging lens 900 includes a lens barrel assembly, an imaging lens group, and a spacer group. The lens barrel assembly includes a first lens barrel P01 and a second lens barrel P02. The imaging lens group, from the object side to the image side, includes, in sequence: 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 can be disposed between the object side and the first lens E1. The first lens E1, the second lens E2, and the third lens E3 form the first lens group, and the fourth lens E4, the fifth lens E5, and the sixth lens E6 form the second lens group. The first lens group is located within the first lens barrel P01, and the second lens group is located within the second lens barrel P02. The spacer group includes a first spacer P1, a first auxiliary spacer P1b, a second spacer P2, a fourth spacer P4, and a fifth spacer P5. The spacers can block excess light during the imaging process from entering the next lens, while also allowing the lens to better contact the lens barrel assembly, thus enhancing the structural stability of the optical imaging lens.

[0135] The lens structure in this embodiment is the same as that in Embodiment 7. Specifically, the basic parameter table of the optical imaging lens in this embodiment is the same as Table 5, and the aspherical coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 lies in the structural dimensions of the first lens barrel P01, the second lens barrel P02, the first auxiliary spacer P1b, the fourth spacer P4, and the fifth spacer P5. For example, parameters such as d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 are different.

[0136] Figure 16A The on-axis chromatic aberration curves of the optical imaging lenses of embodiments 7, 8, and 9 are shown, which represent the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 16B The astigmatism curves of the optical imaging lenses of Examples 7, 8, and 9 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different field of view angles. Figure 16C The distortion curves of the optical imaging lenses in Examples 7, 8, and 9 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. According to... Figures 16A to 16C It can be seen that the optical imaging lenses given in Examples 7, 8, and 9 can achieve good imaging quality.

[0137] Table 7 shows the values ​​of parameters d4s, D4s, d4m, D4m, d5s, D5s, d5m, d01m, d02s, CP4, EP45, CP5, CP1b, L, L1, and L2 for each embodiment in Examples 1 to 9. These parameters can be calculated according to... Figure 1 The measurements were obtained using the annotation method shown, and the units of the parameters listed in Table 7 are all in mm.

[0138] Parameters / Examples 1 2 3 4 5 6 7 8 9 d4s 4.336 4.443 4.233 4.363 4.479 4.285 4.262 4.315 4.101 d4m 4.336 4.443 4.233 4.363 4.479 4.285 4.262 4.315 4.101 D4s 7.295 7.295 7.295 7.300 7.300 7.300 7.300 7.300 7.300 D4m 7.295 7.295 7.295 7.300 7.300 7.300 7.300 7.300 7.300 d5s 4.795 4.837 4.662 4.650 4.650 4.582 4.636 4.744 4.462 d5m 4.795 4.837 4.662 4.650 4.650 4.582 4.636 4.744 4.462 D5s 7.495 7.495 7.495 7.500 7.500 7.500 7.500 7.500 7.500 d01m 7.211 7.032 7.032 7.289 7.289 7.289 7.280 7.279 7.441 d02s 4.923 5.085 5.483 5.354 5.354 5.354 5.354 5.077 5.074 CP4 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 EP45 0.846 0.846 0.846 0.542 0.542 0.542 0.551 0.551 0.551 CP5 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 CP1b 1.16 1.16 1.16 1.35 1.35 1.35 1.70 1.70 1.70 L 15.017 15.017 15.017 15.229 15.229 15.229 14.762 14.762 14.762 L1 7.8773 7.8773 7.8773 7.980 7.980 7.980 7.425 7.425 7.425 L2 3.430 3.430 3.430 3.430 3.430 3.430 3.430 3.430 3.430

[0139] Table 7

[0140] Table 8 shows the values ​​of the conditional expressions for each of the embodiments in Examples 1 to 9.

[0141] Conditional / Example 1 2 3 4 5 6 7 8 9 FNO 1.38 1.38 1.38 1.37 1.37 1.37 1.38 1.38 1.38 L / f 1.54 1.54 1.54 1.57 1.57 1.57 1.48 1.48 1.48 (d5m / d4m) / (N5-N4) 36.86 36.29 36.71 15.23 14.83 15.27 54.39 54.97 54.40 L / f×T34 5.94 5.94 5.94 6.03 6.03 6.03 5.74 5.74 5.74 DT51 / (d4s-d5s) -4.79 -5.58 -5.13 -7.72 -12.97 -7.48 -5.86 -5.11 -6.08 CT5 / EP45×N5 2.74 2.74 2.74 2.57 2.57 2.57 2.86 2.86 2.86 (D4s-d4s) / (T45-CP4) 5.56 5.36 5.75 5.34 5.13 5.48 7.44 7.31 7.84 (D5s-d5s) / (T56-CP5) 5.62 5.53 5.89 6.16 6.16 6.31 6.13 5.90 6.50 F2 / f5×EP45 -1.14 -1.14 -1.14 -0.62 -0.62 -0.62 -1.01 -1.01 -1.01 d4m / (R8-R9) -10.02 -10.26 -9.78 -4.91 -5.04 -4.82 8.56 8.67 8.24 d5m / (R10-R11) 0.02 0.02 0.02 -1.38 -1.38 -1.36 -0.09 -0.09 -0.09 D4m / R9+R10 / D5s -0.24 -0.24 -0.24 6.18 6.18 6.18 -5.14 -5.14 -5.14 F1 / L1 1.12 1.12 1.12 1.10 1.10 1.10 1.19 1.19 1.19 F2 / L2 -2.66 -2.66 -2.66 -2.80 -2.80 -2.80 -2.88 -2.88 -2.88 d02s / (f4 / N4) -1.09 -1.13 -1.21 -1.22 -1.22 -1.22 -1.60 -1.52 -1.51 (d01m-d02s) / (DT32-DT41) 3.05 2.60 2.06 2.46 2.46 2.46 2.46 2.82 3.03 f4 / CP4 / (f1 / CP1b) -12.02 -12.02 -12.02 -7.13 -7.13 -7.13 -33.81 -33.81 -33.81

[0142] Table 8

[0143] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0144] 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 imaging lens group, along the optical axis from the object side to the image side, includes the following in sequence: The first lens group includes a first lens with positive optical power, a second lens with negative optical power, and a third lens with positive optical power arranged sequentially along the optical axis from the object side to the image side; the object side of the first lens is convex; the object side of the second lens is convex and the image side is concave; both the object side and the image side of the third lens are convex. The second lens group includes a fourth lens with negative optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power arranged sequentially along the optical axis from the object side to the image side. The refractive index of the fifth lens is greater than that of either the fourth lens or the sixth lens. The image side of the fourth lens is concave, and the object side of the fifth lens is convex. A spacer assembly includes a fourth spacer disposed on and in contact with the image-side surface of the fourth lens, and a fifth spacer disposed on and in contact with the image-side surface of the fifth lens; and A lens barrel assembly includes a first lens barrel and a second lens barrel, wherein the first lens barrel houses the first lens group and the second lens barrel houses the second lens group; The optical imaging lens contains six lenses with optical power. The aperture number FNO of the optical imaging lens satisfies: 1.37 ≤ FNO < 1.6; The distance L between the object-side end face of the first lens barrel and the image-side end face of the second lens barrel in the direction of the optical axis satisfies the following condition with respect to the total effective focal length f of the optical imaging lens: 1.48 ≤ L / f ≤ 1.57; The inner diameter d4m of the image side of the fourth spacer, the inner diameter d5m of the image side of the fifth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy: 14.83≤(d5m / d4m) / (N5-N4)≤54.

97.

2. The optical imaging lens according to claim 1, characterized in that, The distance L between the object-side end face of the first lens barrel and the image-side end face of the second lens barrel in the direction of the optical axis, the total effective focal length f of the optical imaging lens and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 5.74mm≤L / f×T34≤6.03mm.

3. The optical imaging lens according to claim 1, characterized in that, The maximum effective half-aperture DT51 of the object side of the fifth lens, the inner diameter d4s of the object side of the fourth spacer, and the inner diameter d5s of the object side of the fifth spacer satisfy: -13.0 < DT51 / (d4s-d5s) ≤ -4.

79.

4. The optical imaging lens according to claim 1, characterized in that, The center thickness CT5 of the fifth lens on the optical axis, the spacing EP45 of the fourth spacer and the fifth spacer along the optical axis, and the refractive index N5 of the fifth lens satisfy the following: 2.57≤CT5 / EP45×N5≤2.

86.

5. The optical imaging lens according to claim 1, characterized in that, The inner diameter d4s of the object side of the fourth spacer, the outer diameter D4s of the object side of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis, and the maximum thickness CP4 of the fourth spacer satisfy: 5.13≤(D4s-d4s) / (T45-CP4)≤7.

84.

6. The optical imaging lens according to claim 1, characterized in that, The inner diameter d5s of the object side of the fifth spacer, the outer diameter D5s of the object side of the fifth spacer, the air gap T56 between the fifth lens and the sixth lens on the optical axis, and the maximum thickness CP5 of the fifth spacer satisfy the following: 5.53≤(D5s-d5s) / (T56-CP5)≤6.

50.

7. The optical imaging lens according to claim 1, characterized in that, The effective focal length F2 of the second lens group, the effective focal length f5 of the fifth lens, and the spacing EP45 of the fourth and fifth spacers along the optical axis satisfy: -1.14mm≤F2 / f5×EP45≤-0.62mm.

8. The optical imaging lens according to any one of claims 1-7, characterized in that, The inner diameter d4m of the image side of the fourth spacer, the radius of curvature R8 of the image side of the fourth lens, and the radius of curvature R9 of the object side of the fifth lens satisfy: -10.26≤d4m / (R8-R9)≤8.

67.

9. The optical imaging lens according to any one of claims 1-7, characterized in that, The inner diameter d5m of the image side of the fifth spacer, the radius of curvature R10 of the image side of the fifth lens, and the radius of curvature R11 of the object side of the sixth lens satisfy: -1.38≤d5m / (R10-R11)≤0.

02.

10. The optical imaging lens according to any one of claims 1-7, characterized in that, The outer diameter D4m of the image side of the fourth spacer, the outer diameter D5s of the object side of the fifth spacer, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens satisfy: -5.14≤D4m / R9+R10 / D5s≤6.

18.

11. The optical imaging lens according to any one of claims 1-7, characterized in that, The effective focal length F1 of the first lens group and the length L1 of the first lens barrel in the direction of the optical axis satisfy: 1.10≤F1 / L1≤1.19, and the effective focal length F2 of the second lens group and the length L2 of the second lens barrel in the direction of the optical axis satisfy: -2.88≤F2 / L2≤-2.

66.

12. The optical imaging lens according to any one of claims 1-7, characterized in that, The inner diameter d02s of the object-side end face of the second lens tube, the effective focal length f4 of the fourth lens, and the refractive index N4 of the fourth lens satisfy: -1.60≤d02s / (f4 / N4)≤-1.

09.

13. The optical imaging lens according to any one of claims 1-7, characterized in that, The inner diameter d01m of the image-side end face of the first lens barrel, the inner diameter d02s of the object-side end face of the second lens barrel, the maximum effective half-aperture DT32 of the image-side face of the third lens, and the maximum effective half-aperture DT41 of the object-side face of the fourth lens satisfy: 2.06≤(d01m-d02s) / (DT32-DT41)≤3.

05.

14. The optical imaging lens according to any one of claims 1-7, characterized in that, The spacer assembly further includes a first spacer disposed on and in contact with the image-side surface of the first lens, and a first auxiliary spacer disposed on and in contact with the image-side surface of the first spacer. Wherein, the effective focal length f1 of the first lens, the effective focal length f4 of the fourth lens, the maximum thickness CP1b of the first auxiliary spacer and the maximum thickness CP4 of the fourth spacer satisfy: -33.81≤f4 / CP4 / (f1 / CP1b)≤-7.

13.

15. The optical imaging lens according to any one of claims 1-7, characterized in that, The air gap between the third lens and the fourth lens on the optical axis is variable, and the variable is less than 3 mm.

Images