Optical imaging lens

Abstract

The utility model provides an optical imaging lens. The optical imaging lens comprises a lens barrel, a lens group and a spacing assembly, wherein the lens group and the spacing assembly are accommodated in the lens barrel; the lens group comprises first to sixth lenses which are sequentially arranged from the object side to the image side along the optical axis, and the fifth lens is glued with the fourth lens or the sixth lens; the spacing assembly comprises a third spacing element which is arranged on the image side of the third lens and is in contact with the image side surface of the third lens; the fourth spacing element is arranged on the image side of the fourth lens and is in contact with the image side surface of the fourth lens; the fifth spacing element is arranged on the image side of the fifth lens and is in contact with the image side surface of the fifth lens; the optical imaging lens satisfies the following conditions: 2.35 lt; (d0s-D5s) / d0mlt, (d0s-D5s 3.10, 3.10; 3.20 lt, 3.20 lt; eB5 / CT5 * N5lt; 5.10).

Description

Technical Field

[0001] This application relates to the field of optical device technology, and in particular to an optical imaging lens. Background Technology

[0002] With the improvement of living standards and the enhancement of security awareness, people have higher requirements for home security. Therefore, consumers generally require surveillance cameras to have a wide angle, high resolution, and be able to obtain bright and clear video images even in dim environments at night.

[0003] Among the many optical imaging lenses used in surveillance, fisheye lenses stand out due to their wide field of view. To maximize light reception, the outermost lens of a fisheye lens typically has a large aperture, resulting in a large object end and a small image end. This can easily lead to ghosting, resulting in poor image quality in existing fisheye lenses. Although the ghosting effect can be mitigated by cementing the lenses closer to the image side, improperly sized lenses after cementation can further degrade image quality, failing to meet consumer needs. Utility Model Content

[0004] One advantage of this application is that it provides an optical imaging lens with more stable imaging performance, which can meet the needs of reducing ghosting and improving image quality.

[0005] An optical imaging lens, including a lens barrel and a lens group and a spacer assembly housed within the lens barrel;

[0006] The inner diameter of the object side of the lens tube is larger than the inner diameter of the image side.

[0007] The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side along the optical axis of the optical imaging lens, wherein the fifth lens is cemented with the fourth lens or the sixth lens, and each lens in the lens group has an effective diameter region for refracting light and a non-effective diameter region surrounding the effective diameter region.

[0008] The spacing assembly includes a second spacing element positioned on the image side of the second lens and in contact with the image side surface of the second lens, a third spacing element positioned on the image side of the third lens and in contact with the image side surface of the third lens, and a fifth spacing element positioned on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the optical imaging lens satisfies:

[0009] 2.35 < (d0s - D5s) / d0m < 3.10;

[0010] 3.20 <EB5 / CT5*N5<5.10;

[0011] Wherein, d0s is the inner diameter of the object side of the lens barrel, D5s is the outer diameter of the object side of the fifth spacer element, d0m is the inner diameter of the image side of the lens barrel, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the center thickness of the fifth lens, and N5 is the refractive index of the fifth lens.

[0012] In some embodiments of this application, the optical imaging lens also satisfies:

[0013] 4.60 <d0s / d0m*tan(Semi-FOV / 2)<5.50;

[0014] Wherein, d0s is the inner diameter of the object side of the lens barrel, d0m is the inner diameter of the image side of the lens barrel, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0015] In some embodiments of this application, the optical imaging lens also satisfies:

[0016] -4.65 <d0s / (f1 / N1)<-3.75;

[0017] Wherein, d0s is the inner diameter of the object side of the lens barrel, f1 is the effective focal length of the first lens, and N1 is the refractive index of the first lens.

[0018] In some embodiments of this application, the optical imaging lens also satisfies:

[0019] 1.40 <D0s / L<1.70;

[0020] Where D0s is the outer diameter of the object side of the lens barrel, and L is the maximum height of the lens barrel.

[0021] In some embodiments of this application, the optical imaging lens also satisfies:

[0022] 0.45 <EB5 / (CT5+CT6)<0.85;

[0023] Wherein, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the center thickness of the fifth lens, and CT6 is the center thickness of the sixth lens.

[0024] In some embodiments of this application, the optical imaging lens also satisfies:

[0025] 1.60 <CT6 / CP5≤3.75;

[0026] Wherein, CT6 is the center thickness of the sixth lens, and CP5 is the maximum thickness of the fifth spacer element.

[0027] In some embodiments of the present application, the optical imaging lens further satisfies:

[0028] 4.28 ≤ L / (f / EPD) ≤ 4.56;

[0029] Where, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0030] In some embodiments of the present application, the optical imaging lens further satisfies:

[0031] 1.95 < (|R9| + |R10|) / N5 < 5.50, 1.10 < OD5 / ODi < 1.60, i = 4 or 6;

[0032] Where, R9 is the curvature radius of the object side surface of the fifth lens, R10 is the curvature radius of the image side surface of the fifth lens, N5 is the refractive index of the fifth lens, OD5 is the maximum outer diameter of the fifth lens, OD4 is the maximum outer diameter of the fourth lens glued to the object side surface of the fifth lens, and OD6 represents the maximum outer diameter of the sixth lens glued to the image side surface of the fifth lens.

[0033] In some embodiments of the present application, the optical imaging lens further satisfies:

[0034] -1.90 < (R11 + R12) / D0m < -0.45;

[0035] Where, R11 is the curvature radius of the object side surface of the sixth lens, R12 is the curvature radius of the image side surface of the sixth lens, and D0m is the outer diameter of the image side surface of the lens barrel.

[0036] In some embodiments of the present application, the optical imaging lens further satisfies:

[0037] 0.45 < (D3s - d3m) / CP3 < 3.05;

[0038] Where, D3s is the outer diameter of the object side surface of the third spacer element, d3m is the inner diameter of the image side surface of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

[0039] In some embodiments of the present application, the optical imaging lens further satisfies:

[0040] 3.05 < |R7 / R6| + CP3 / T34 < 6.45;

[0041] Wherein, R7 is the object-side radius of curvature of the fourth lens, R6 is the image-side radius of curvature of the third lens, CP3 is the maximum thickness of the third spacer element, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

[0042] In some embodiments of this application, the optical imaging lens also satisfies:

[0043] 0.95<(EB5-CT5) / SP5<2.60, 0.55<(D5s-d5m) / CP5<3.06;

[0044] Wherein, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the center thickness of the fifth lens, SP5 is the length of the outer peripheral surface of the fifth lens parallel to the optical axis in contact with the lens barrel, D5s is the outer diameter of the object side of the fifth spacer element, d5m is the inner diameter of the image side of the fifth spacer element, and CP5 is the maximum thickness of the fifth spacer element.

[0045] In summary, the optical imaging lens provided in this application increases the amount of light entering the lens by setting the shape of the lens barrel to have a large aperture on the object side and a small aperture on the image side. The fifth lens is cemented with the fourth or sixth lens. Since the fifth lens is located at the rear end of the lens barrel (closer to the image side) and has a large radial step difference with the object side of the lens barrel, the overall shape of the fifth lens (including the effective diameter region and the ineffective diameter region) affects the front and rear air gaps, which can cause MTF field curvature shift or peak drop, resulting in the image quality or optical performance failing to meet consumer-grade requirements. Based on this, this application controls the center thickness CT5 of the fifth lens and the fifth lens... The maximum thickness EB5 of the non-effective diameter region of the lens and the refractive index N5 of the fifth lens are optimized to improve the shape of the fifth lens. This ensures a stable connection between the fifth lens and the lens barrel at the bearing point, preventing misalignment. This prevents significant changes in the field curvature of the external field of view of the optical imaging lens after high temperature and humidity. At the same time, constraining the thickness of the non-effective diameter region of the fifth lens limits the maximum thickness of the fifth spacer element and reduces the change in air gap between the cemented body and the lenses in front of or behind the cemented body during assembly. This improves the problem of the peak value of the external field of view of the optical imaging lens dropping during assembly and enhances the optical performance of the lens. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structural parameters of an optical imaging lens according to one embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the structural parameters of an optical imaging lens at the fourth and fifth lenses according to one embodiment of this application;

[0048] Figure 3AThis is a schematic diagram of the structure of the optical imaging lens in working condition 1-1 according to Embodiment 1 of this application;

[0049] Figure 3B This is a schematic diagram of the structure of the optical imaging lens in working conditions 1-2 of Embodiment 1 of this application;

[0050] Figure 3C This is a schematic diagram of the structure of the optical imaging lens in working conditions 1-3 of Embodiment 1 of this application;

[0051] Figure 4A The diagram shows the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to the above embodiment 1 of this application.

[0052] Figure 4B A schematic diagram of the astigmatism curves of the optical imaging lens under three operating conditions according to the above embodiment 1 of this application is shown.

[0053] Figure 4C The diagram shows the relative illumination curves of the optical imaging lens under three operating conditions according to the above embodiment 1 of this application.

[0054] Figure 5A This is a schematic diagram of the structure of the optical imaging lens in working condition 2-1 of Embodiment 2 of this application;

[0055] Figure 5B This is a schematic diagram of the structure of the optical imaging lens in working condition 2-2 according to Embodiment 2 of this application;

[0056] Figure 5C This is a schematic diagram of the structure of the optical imaging lens in working conditions 2-3 of Embodiment 2 of this application;

[0057] Figure 6A The diagram shows the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to the above-described embodiment 2 of this application.

[0058] Figure 6B A schematic diagram of the astigmatism curves of the optical imaging lens under three operating conditions according to the above embodiment 2 of this application is shown.

[0059] Figure 6C A schematic diagram of the relative illumination curves of the optical imaging lens under three working conditions according to the above embodiment 2 of this application is shown.

[0060] Figure 7A This is a schematic diagram of the structure of the optical imaging lens in working condition 3-1 of Embodiment 3 of this application;

[0061] Figure 7B This is a schematic diagram of the structure of the optical imaging lens in working condition 3-2 of Embodiment 3 of this application;

[0062] Figure 7C This is a schematic diagram of the optical imaging lens in working condition 3-3 of Embodiment 3 of this application;

[0063] Figure 8A The diagram shows the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to the above-described embodiment 3 of this application.

[0064] Figure 8B The diagram shows the astigmatism curves of the optical imaging lens under three operating conditions according to the above-described embodiment 3 of this application.

[0065] Figure 8C The diagram shows the relative illumination curves of the optical imaging lens under three working conditions according to the above-described embodiment three of this application.

[0066] Figure 9A The diffraction MTF curves of the optical imaging lens are shown respectively when (d0s-D5s) / d0m=3.0 and EB5 / CT5*N5=2.2;

[0067] Figure 9B The diffraction MTF curves of the optical imaging lens are shown respectively when (d0s-D5s) / d0m=3.0 and EB5 / CT5*N5=5.0;

[0068] Figure 9C The diffraction MTF curves of the optical imaging lens are shown respectively when (d0s-D5s) / d0m=3.0 and EB5 / CT5*N5=7.0.

[0069] Figure Labels

[0070] E1, First lens; E2, Second lens; E3, Third lens; E4, Fourth lens; E5, Fifth lens; E6, Sixth lens; P0, Lens tube; P2, Second spacer element; P3, Third spacer element; P4, Fourth spacer element; P5, Fifth spacer element. Detailed Implementation

[0071] 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. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0072] 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.

[0073] 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 strictly to scale.

[0074] In this paper, 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 shape in the paraxial region can be determined according to methods commonly used in the art, such as using the sign of the R value (R refers to the radius of curvature of the paraxial region) to determine concavity or convexity. In this paper, 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. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0075] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," 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 expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, 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.

[0076] 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 a 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.

[0077] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. The following embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this application. It should be pointed out that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these fall within the protection scope of this application. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0078] like Figure 1 and Figure 2 As shown, this application proposes an optical imaging lens, which may include a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the inner diameter of the object side of the lens barrel P0 is larger than the inner diameter of the image side.

[0079] The lens group 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 arranged sequentially from the object side to the image side along the optical axis of the optical imaging lens. The fifth lens E5 is cemented to either the fourth lens E4 or the sixth lens E6. Each lens in the lens group has an effective diameter region for refracting light and a non-effective diameter region surrounding the effective diameter region. The non-effective diameter region of the lens is also the structural region, which is mainly used to contact the lens barrel P0 or other lenses to support the lens.

[0080] The spacing assembly includes a second spacing element P2 positioned on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacing element P3 positioned on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, and a fifth spacing element P5 positioned on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5; the optical imaging lens satisfies:

[0081] 2.35 < (d0s - D5s) / d0m < 3.10;

[0082] 3.20 <EB5 / CT5*N5<5.10;

[0083] Wherein, d0s is the inner diameter of the object side of the lens barrel P0, D5s is the outer diameter of the object side of the fifth spacer element P5, d0m is the inner diameter of the image side of the lens barrel P0, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens E5, CT5 is the center thickness of the fifth lens E5, and N5 is the refractive index of the fifth lens E5.

[0084] The optical imaging lens provided by this application is mainly used for ultra-wide-angle imaging, that is, in fisheye imaging. The inner diameter of the object side of the lens barrel P0 is larger than that of the image side, and the object side of the first lens E1 is convex to capture light as much as possible to achieve ultra-wide-angle imaging. Among them, for the ghost image problem in ultra-wide-angle imaging, this application glues the fifth lens E5 located at the rear end (the end close to the image side) to the fourth lens E4 or the sixth lens E6, and avoids multiple reflections of light at the narrow gap by eliminating the gap between the lenses, thereby reducing ghost images. However, since the fifth lens E5 is part of the cemented body and the fifth lens E5 is located at the rear end, the influence of the overall shape of the fifth lens E5 on the air gap will cause MTF field curvature deviation or peak drop, resulting in the imaging quality or optical performance not meeting the requirements of the consumer level. Based on this, this application optimizes the shape of the fifth lens E5 by controlling that 3.20 < EB5 / CT5 * N5 < 5.10 is satisfied among the central thickness CT5 of the fifth lens E5, the maximum thickness EB5 of the non-effective diameter region of the fifth lens E5, and the refractive index N5 of the fifth lens E5. In this way, the fifth lens E5 and the lens barrel P0 are stably connected at the bearing position and are not easily displaced, so that the change amount of the field curvature of the outer field of this optical imaging lens will not change greatly after high temperature and high humidity. At the same time, restricting the thickness of the non-effective diameter region of the fifth lens can limit the maximum thickness of the fifth spacer element and also reduce the change amount of the air gap between the cemented body and the lens in front of or behind the cemented body during assembly, thereby improving the problem of peak drop in the outer field of this optical imaging lens during assembly and enhancing the optical performance of the lens.

[0085] Exemplarily, Figure 9A The diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 2.2 are respectively shown. Figure 9B The diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 5.0 are respectively shown. Figure 9C The diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 7.0 are respectively shown. As can be easily seen from the figure: As Figure 9B shown, when the optical imaging lens satisfies (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 5.0, the overall field curvature and peak of the optical imaging lens meet the assessment range, and the optical performance is good; while as Figure 9A shown, when the relational expression EB5 / CT5 * N5 is 2.2, the non-effective diameter region of the fifth lens E5 becomes thinner, and the front and rear spacer elements of the fifth lens E5 become thicker, affecting the air gap before and after the cemented body, resulting in the right shift of the field curvature of the outer field and peak drop; as Figure 9CAs shown, when the relationship EB5 / CT5*N5 is 7.0, the non-effective diameter region of the fifth lens E5 becomes thicker, the spacer elements before and after the fifth lens E5 are adaptively thinned, the field curvature of the MTF curve outside the field of view shifts slightly to the left, and the peak value drops.

[0086] Preferably, the optical imaging lens satisfies: 2.37≤(d0s-D5s) / d0m≤3.08; 3.21≤EB5 / CT5*N5≤5.09.

[0087] According to some embodiments of this application, the optical imaging lens also satisfies: 4.60 <d0s / d0m*tan(Semi-FOV / 2)<5.50;

[0088] Wherein, d0s is the inner diameter of the object side of the lens barrel P0, d0m is the inner diameter of the image side of the lens barrel P0, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0089] This helps increase the assembly stability of the lens group in the optical imaging lens. Specifically, since the inner diameter d0s of the object side of the lens barrel P0 determines the size of the lens head, and the inner diameter d0m of the image side of the lens barrel P0 determines the maximum field of view of the optical imaging lens; through the constraint of this conditional formula, a reasonable fit can be achieved between the object side and front face, image side and rear face of the lens barrel P0 and the lens group, avoiding large misalignment of the assembly bearing surfaces, thereby helping to improve the assembly stability of the entire lens group.

[0090] Preferably, the optical imaging lens satisfies: 4.63≤d0s / d0m*tan(Semi-FOV / 2)≤5.47.

[0091] According to some embodiments of this application, the optical imaging lens also satisfies: -4.65 <d0s / (f1 / N1)<-3.75;

[0092] Wherein, d0s is the inner diameter of the object side surface of the lens barrel P0, f1 is the effective focal length of the first lens E1, and N1 is the refractive index of the first lens E1.

[0093] This helps improve the stability of lens assembly and reduce stray light in the lens. Specifically, by controlling the relationship between the inner diameter of the object side of the lens barrel P0, the effective focal length of the first lens E1, and the refractive index within a reasonable range, it helps improve the manufacturability of the first lens E1, enhances assembly stability, and controls the overall dimensions of the lens barrel P0; at the same time, it helps to improve the problems of transmitted stray light and internal reflection stray light related to the first lens E1, thereby improving the image quality of the lens.

[0094] Preferably, the optical imaging lens satisfies: -4.61≤d0s / (f1 / N1)≤-3.77.

[0095] According to some embodiments of this application, the optical imaging lens also satisfies: 1.40 <D0s / L<1.70;

[0096] Wherein, D0s is the outer diameter of the object side of the lens barrel P0, and L is the maximum height of the lens barrel P0.

[0097] This expands the application scenarios of the optical imaging lens. Specifically, since the inner diameter d0s of the object side of the lens barrel P0 determines the head size of the lens assembly, and the maximum height of the lens barrel P0 is generally determined by the aperture size of the first lens E1 or the last lens, by controlling the relationship between the outer diameter of the object side of the lens barrel P0 and the maximum height of the lens barrel P0 within a reasonable range, the height of the lens can be effectively reduced, and the head size of the lens can be effectively reduced. This is beneficial for expanding the application scenarios of the lens, allowing the optical imaging lens to be used in more electronic devices and devices with strict space constraints.

[0098] Preferably, the optical imaging lens satisfies: 1.44≤D0s / L≤1.66.

[0099] According to some embodiments of this application, the optical imaging lens also satisfies: 0.45 <EB5 / (CT5+CT6)<0.85;

[0100] Wherein, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens E5, CT5 is the center thickness of the fifth lens E5, and CT6 is the center thickness of the sixth lens E6.

[0101] This helps reduce the field curvature change in the external field of view after exposure to high temperature and humidity. Specifically, by controlling the relationship between the thickness of the non-effective diameter region of the fifth lens E5, the center thickness of the fifth lens E5, and the center thickness of the sixth lens E6 within a reasonable range, the optimal bearing position can be adopted for the fifth lens E5, thereby improving assembly stability and helping to reduce the field curvature change in the external field of view after exposure to high temperature and humidity.

[0102] Preferably, the optical imaging lens satisfies: 0.49≤EB5 / (CT5+CT6)≤0.82.

[0103] According to some embodiments of this application, the optical imaging lens also satisfies: 1.60 <CT6 / CP5≤3.75;

[0104] Wherein, CT6 is the center thickness of the sixth lens E6, and CP5 is the maximum thickness of the fifth spacer element P5.

[0105] This can further reduce the field curvature variation of the outer field of view after high temperature and high humidity. Specifically, since the thickness of the fifth spacer element P5 is affected by the thickness and surface shape of the sixth lens E6, by controlling the relationship between the central thickness of the sixth lens E6 and the maximum thickness of the fifth spacer element P5 within a reasonable range, an optimal bearing position can be adopted for the fifth lens E5 to improve the assembly stability and reduce the field curvature variation of the outer field of view after high temperature and high humidity.

[0106] Preferably, the optical imaging lens satisfies: 1.62 ≤ CT6 / CP5 ≤ 3.75.

[0107] According to some embodiments of the present application, the optical imaging lens further satisfies: 4.28 ≤ L / (f / EPD) ≤ 4.56;

[0108] where, L is the maximum height of the lens barrel P0, f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

[0109] This can ensure the stability of the assembly between the lenses. Specifically, the ratio of the effective focal length of the optical lens to the entrance pupil diameter is the F-number (i.e., the aperture number), which can determine the application scenario of the lens; therefore, through the above conditional formula, not only can the ratio between the aperture size of the lens group and the maximum height of the lens barrel P0 along the optical axis direction be effectively controlled, thereby ensuring the assembly stability of each lens, but it can also affect its cooperation mode and cooperation dimensions with several lens barrels P0. Specifically, the inner wall of the lens barrel is provided with a step matching the size of the lens to ensure the position stability of each lens. The cooperation mode between the lens and the step can be that the two are in contact with each other along the radial direction of the lens barrel or that the two are in contact with each other along the optical axis direction. The cooperation dimension is the size of the contact surface between the lens and the step. Through the constraint of this conditional formula, when one cooperation mode cannot meet the requirements of optical performance, another cooperation mode can be adopted, that is, the contact direction and the size of the contact area between the lens and the lens barrel are changed, and at the same time, spacer elements of different sizes are adaptively replaced to ensure that the optical imaging lens can still meet the requirements of optical performance within the current limited adjustment space.

[0110] According to some embodiments of the present application, the optical imaging lens further satisfies: 1.95 < (|R9| + |R10|) / N5 < 5.50, 1.10 < OD5 / ODi < 1.60, i = 4 or 6;

[0111] Wherein, R9 is the radius of curvature of the object side surface of the fifth lens E5, R10 is the radius of curvature of the image side surface of the fifth lens E5, N5 is the refractive index of the fifth lens E5, OD5 is the maximum outer diameter of the fifth lens E5, OD4 is the maximum outer diameter of the fourth lens E4 cemented to the object side surface of the fifth lens E5, and OD6 is the maximum outer diameter of the sixth lens E6 cemented to the image side surface of the fifth lens E5.

[0112] This enhances the structural strength of the cemented body in the optical imaging lens. Specifically, by controlling the relationship between the object-side radius of curvature, image-side radius of curvature, refractive index, maximum outer diameter of the fifth lens E5, and the maximum outer diameter of the lens cemented with the object-side or image-side of the fifth lens E5 within a reasonable range, the curvature radii on both sides of the fifth lens E5 can be controlled to facilitate cementing with the fourth lens E4 or the sixth lens E6. Furthermore, by constraining the ratio of the outer diameter of the fifth lens E5 to the outer diameter of the fourth lens E4 or the sixth lens E6, and constraining the length of the structural region of the fourth lens E4 or the sixth lens E6, it is beneficial to ensure that the bonding surface of the cemented body is large enough, facilitating cementing and improving the strength of the cemented body at the bonding surface.

[0113] Preferably, the optical imaging lens satisfies: 2≤(|R9|+|R10|) / N5≤5.46, 1.14≤OD5 / ODi≤1.56, i=4 or 6.

[0114] According to some embodiments of this application, the optical imaging lens also satisfies: -1.90 < (R11 + R12) / D0m < -0.45;

[0115] Wherein, R11 is the object-side radius of curvature of the sixth lens E6, R12 is the image-side radius of curvature of the sixth lens E6, and D0m is the image-side outer diameter of the lens barrel P0.

[0116] This is beneficial for improving the assembly stability of the optical imaging lens. Since the radius of curvature R11 of the object side of the sixth lens E6 determines the thickness of the fifth spacer element P5, and the radius of curvature R12 of the image side of the sixth lens E6 determines the inner diameter of the image side of the lens barrel P0, the distance between the fifth spacer element P5 and the lens barrel P0 along the optical axis determines the edge thickness of the sixth lens E6. This edge thickness, along with the radius of curvature of the sixth lens E6, jointly affects the ease of lens forming and assembly stability. Under the condition described above, the smaller the radius of curvature R11 of the object side of the sixth lens E6, the better the assembly stability.

[0117] Preferably, the optical imaging lens satisfies: -1.81≤(R11+R12) / D0m≤-0.46.

[0118] According to some embodiments of this application, the optical imaging lens also satisfies: 0.45 < (D3s - d3m) / CP3 < 3.05;

[0119] Wherein, D3s is the outer diameter of the object side of the third spacer element P3, d3m is the inner diameter of the image side of the third spacer element P3, and CP3 is the maximum thickness of the third spacer element P3.

[0120] This approach improves the imaging quality of the optical imaging lens by reducing stray light. Specifically, the incident light converges between the second lens E2 and the third lens E3, then diverges and is transmitted to the image side via the fourth lens E4, the fifth lens E5, and the sixth lens E6. By properly controlling the outer diameter of the third spacer element P3 near the object side and the inner diameter of the third spacer element P3 near the image side, stray light in the optical path can be effectively blocked without affecting the principal ray in the incident light. By properly controlling the center thickness of the third lens E3 on the optical axis, the principal ray in the incident light can be ensured to be transmitted along a predetermined path within the third lens E3. The third lens E3 plays a crucial role in the optical path and is essential for the imaging of the optical imaging lens. Properly controlling the surface shape of the third lens E3 can improve the imaging quality of the optical imaging lens.

[0121] Preferably, the optical imaging lens satisfies: 0.46≤(D3s-d3m) / CP3≤3.04.

[0122] According to some embodiments of this application, the optical imaging lens also satisfies: 3.05 < |R7 / R6| + CP3 / T34 < 6.45;

[0123] Wherein, R7 is the object-side radius of curvature of the fourth lens E4, R6 is the image-side radius of curvature of the third lens E3, CP3 is the maximum thickness of the third spacer element P3, and T34 is the air gap between the third lens E3 and the fourth lens E4 on the optical axis.

[0124] This helps improve the overall stray light quality of the optical imaging lens. The radius of curvature R7 of the object side of the fourth lens E4 can determine the thickness of the third spacer element P3. Through the constraint of this condition, it is helpful to control the thickness of the fourth lens E4 and the air gap between the third lens E3 and the fourth lens E4. The larger the gap, the more types of spacer elements can be selected, the greater the space for stray light improvement, and the better the overall stray light quality of the lens.

[0125] Preferably, the optical imaging lens satisfies: 3.08≤|R7 / R6|+CP3 / T34≤6.43.

[0126] According to some embodiments of this application, the optical imaging lens also satisfies: 0.95 < (EB5-CT5) / SP5 < 2.60, 0.55 < (D5s-d5m) / CP5 < 3.06;

[0127] Wherein, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens E5, CT5 is the center thickness of the fifth lens E5, SP5 is the length of the outer peripheral surface of the fifth lens E5 parallel to the optical axis in contact with the lens barrel P0, D5s is the outer diameter of the object side of the fifth spacer element P5, d5m is the inner diameter of the image side of the fifth spacer element P5, and CP5 is the maximum thickness of the fifth spacer element P5.

[0128] This helps reduce the risk of stray light. Specifically, by controlling the center thickness, structural area thickness, and length of contact with the lens barrel P0 of the fifth lens E5, the stability of the fifth lens E5 is improved. Furthermore, by constraining the inner and outer diameters and thickness of the fifth spacer element P5, excess light rays at the edge after passing through the fifth lens E5 can be blocked, thus reducing the risk of stray light.

[0129] Preferably, the optical imaging lens satisfies: 0.98≤(EB5-CT5) / SP5≤2.58, 0.56≤(D5s-d5m) / CP5≤3.05.

[0130] It should be noted that those skilled in the art should understand that, without departing from the technical solutions claimed in this application, the number of spacers constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and this application does not specifically limit this. For example, as needed, the optical imaging lens may also include other numbers of spacers than those described in the above embodiments.

[0131] The following describes in more detail, with reference to the accompanying drawings, some specific, but not limiting, embodiments of the above-described embodiments of this application. For ease of description, in the following embodiments, OBJ represents the object plane of the optical imaging lens, STO represents the surface of the aperture stop, S1 represents the object-side plane of the first lens E1, S2 represents the image-side plane of the first lens E1, S3 represents the object-side plane of the second lens E2, S4 represents the image-side plane of the second lens E2, S5 represents the object-side plane of the third lens E3, S6 represents the image-side plane of the third lens E3, S7 represents the object-side plane of the fourth lens E4, S8 represents the image-side plane of the fourth lens E4, S9 represents the object-side plane of the fifth lens E5, S10 represents the image-side plane of the fifth lens E5, S11 represents the object-side plane of the sixth lens E6, S12 represents the image-side plane of the sixth lens E6, S13 represents the object-side plane of the filter in the photosensitive assembly behind the lens, S14 represents the image-side plane of the filter in the photosensitive assembly behind the lens, and S15 represents the light-receiving surface of the photosensitive chip in the photosensitive assembly behind the lens. Furthermore, let Aj denote the j-th order aspherical coefficient, j = 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30.

[0132] Example 1

[0133] like Figure 1 and Figures 3A to 3C As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the inner diameter of the object-side surface of the lens barrel P0 is larger than the inner diameter of the image-side surface; the lens group includes, arranged sequentially along the optical axis from the object-side surface to the image-side surface: 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, wherein the sixth lens E6 is cemented to the fifth lens E5; the image-side surface of the lens barrel P0 is provided with a radially extending stop step, and the image-side surface of the sixth lens E6 abuts against the stop step along the optical axis; the spacer assembly includes a... The second spacer element P2 is located on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2; the third spacer element P3 is located on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3; the fourth spacer element P4 is located on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4; and the fifth spacer element P5 is located on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5. The image side surface of the fifth spacer element P5 also contacts the stop step on the lens barrel P0 to form support for the fifth lens E5.

[0134] In this embodiment, the first lens E1 has negative optical power, the object-side surface S1 of the first lens E1 is convex, and the image-side surface S2 of the first lens E1 is concave; the second lens E2 has negative optical power, the object-side surface S3 of the second lens E2 is convex, and the image-side surface S4 of the second lens E2 is concave; the third lens E3 has positive optical power, the object-side surface S5 of the third lens E3 is concave, and the image-side surface S6 of the third lens E3 is convex; the fourth lens E4 has positive optical power, the object-side surface S7 of the fourth lens E4 is convex, and the image-side surface S8 of the fourth lens E4 is convex; the fifth lens E5 has negative optical power, the object-side surface S9 of the fifth lens E5 is concave, and the image-side surface S10 of the fifth lens E5 is concave; the sixth lens E6 has positive optical power, the object-side surface S11 of the sixth lens E6 is convex, and the image-side surface S12 of the sixth lens E6 is convex.

[0135] It is worth noting that in this embodiment, the basic optical parameters (lens shape, radius of curvature, thickness, material and conic coefficient) of the optical imaging lens are the same under the three working conditions. The difference lies in some structural data, such as the spacing between the non-effective diameter regions of the lens, the shape of the spacer element, the arrangement of the spacer element, etc., specifically including parameters: d3m, D3s, d5m, D5s, d0s, d0m, D0s, D0m, CP3, CP5, L, OD6, OD4, EB5, SP5, OD5.

[0136] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Embodiment 1, wherein the units of radius of curvature, center thickness / distance and effective radius are all millimeters (mm).

[0137] Table 1: Basic Optical Parameters of the Optical Imaging Lens in Example 1

[0138] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 1000.0000 S1 Sphere 6.9450 0.6700 1.772，49.61 S2 Sphere 1.8103 0.9432 S3 Asphere 1.4709 0.3000 1.544，56.11 -12.5773 S4 Asphere 0.7174 1.4978 -0.8298 S5 Asphere -1.6673 1.1460 1.64，23.53 -2.9049 S6 Asphere -1.1941 -0.0804 -2.2860 STO Sphere Infinity 0.2094 S7 Asphere 2.3261 0.8550 1.544，56.11 0.8674 S8 Asphere -1.7846 0.0350 -0.4246 S9 Asphere -8.2252 0.4350 1.661，20.37 62.1032 S10 Asphere 0.8501 0.0020 1.52，60.0 -0.7078 S11 Asphere 0.8501 1.0000 1.544，56.11 -0.7078 S12 Asphere -2.9358 0.1439 -17.7552 S13 Sphere Infinity 0.2100 1.517，64.2 S14 Sphere Infinity 0.6348 S15 Sphere Infinity

[0139] It should be noted that the materials in Table 1 include refractive index and Abbe number. For example, in Table 1, the materials 1.772 and 49.61 for S1 indicate that the refractive index of the first lens E1 is 1.772 and the Abbe number is 49.61, respectively.

[0140] In this embodiment, the object-side surface and image-side surface of any one of the second lens E2 to the sixth lens E6 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0141]

[0142] 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 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S2 to S12 in Embodiment 1. In subsequent embodiments, the surface shape of the aspherical lens of the optical imaging lens also satisfies the above formula.

[0143] Table 2: Aspherical coefficients of the optical imaging lens in Example 1

[0144] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.17E-01 -3.88E+00 1.74E+01 -5.37E+01 1.15E+02 -1.74E+02 1.91E+02 S2 -6.38E-01 1.65E+01 -2.48E+02 2.18E+03 -1.23E+04 4.75E+04 -1.29E+05 S3 -1.81E-01 1.74E-01 -1.12E+00 5.32E+00 -1.58E+01 3.17E+01 -4.09E+01 S4 1.42E-02 -2.68E-01 9.56E-01 -2.05E+00 2.82E+00 -2.17E+00 7.34E-01 S5 8.72E-02 -3.02E-01 7.04E-01 -1.12E+00 9.92E-01 -4.39E-01 7.52E-02 S6 2.96E-02 -1.82E+00 1.04E+01 -3.16E+01 6.01E+01 -7.31E+01 5.53E+01 S7 2.22E-01 -2.41E+00 1.11E+01 -3.11E+01 5.61E+01 -6.51E+01 4.68E+01 S8 1.37E+00 -6.42E+00 1.99E+01 -4.45E+01 6.29E+01 -3.47E+01 -3.55E+01 S9 1.37E+00 -6.42E+00 1.99E+01 -4.45E+01 6.29E+01 -3.47E+01 -3.55E+01 S10 8.98E-02 -1.86E+00 1.41E+01 -5.95E+01 1.58E+02 -2.67E+02 2.77E+02 Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.53E+02 8.93E+01 -3.76E+01 1.11E+01 -2.19E+00 2.59E-01 -1.38E-02 S2 2.52E+05 -3.55E+05 3.57E+05 -2.51E+05 1.17E+05 -3.23E+04 4.04E+03 S3 3.04E+01 -9.81E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S5 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 -2.36E+01 4.36E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 -1.88E+01 3.19E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S8 6.71E+01 -3.04E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S9 6.71E+01 -3.04E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S10 -1.61E+02 3.99E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0145] like Figures 4A to 4C As shown, Figure 4A The diagram shows the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to the above-described embodiment 1 of this application. Figure 4B The diagram shows the astigmatism curves of the optical imaging lens under three operating conditions according to the above-described embodiment 1 of this application. Figure 4C A schematic diagram showing the relative illumination curves of the optical imaging lens under three operating conditions according to the above-described embodiment 1 of this application is illustrated. Figures 4A to 4C It can be seen that the optical imaging lens in the three working conditions of Example 1 has good imaging quality.

[0146] Example 2

[0147] like Figure 1 and Figures 5A to 5C As shown, the optical imaging lenses in Embodiment 2 and Embodiment 1 have the same number of lenses, the same number of spacers, and the same positive and negative optical power distribution. However, the surface shape of the lens in Embodiment 2 is different from that of the lens in Embodiment 1.

[0148] In Embodiment 2, the first lens E1 has negative optical power, the object-side surface S1 of the first lens E1 is convex, and the image-side surface S2 of the first lens E1 is concave; the second lens E2 has negative optical power, the object-side surface S3 of the second lens E2 is concave, and the image-side surface S4 of the second lens E2 is concave; the third lens E3 has positive optical power, the object-side surface S5 of the third lens E3 is concave, and the image-side surface S6 of the third lens E3 is convex; the fourth lens E4 has positive optical power, the object-side surface S7 of the fourth lens E4 is convex, and the image-side surface S8 of the fourth lens E4 is convex; the fifth lens E5 has negative optical power, the object-side surface S9 of the fifth lens E5 is convex, and the image-side surface S10 of the fifth lens E5 is concave; the sixth lens E6 has positive optical power, the object-side surface S11 of the sixth lens E6 is convex, and the image-side surface S12 of the sixth lens E6 is convex.

[0149] In Example 2, the fifth lens E5 is also cemented to the sixth lens E6.

[0150] It is worth noting that in this embodiment, the basic optical parameters (lens shape, radius of curvature, thickness, material and conic coefficient) of the optical imaging lens are the same under the three working conditions. The difference lies in some structural data, such as the spacing between the non-effective diameter regions of the lens, the shape of the spacer element, the arrangement of the spacer element, etc., specifically including parameters: d3m, D3s, d5m, D5s, d0s, d0m, D0s, D0m, CP3, CP5, L, OD6, OD4, EB5, SP5, OD5.

[0151] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Embodiment 2, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0152] Table 3 Optical parameters of the optical imaging lens in Example 2

[0153] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 1000.0000 S1 Sphere 7.0000 0.5000 1.772，49.61 S2 Sphere 1.9249 1.0312 S3 Asphere -47.2571 0.3746 1.535，55.65 -55.8052 S4 Asphere 1.1256 1.0377 0.0306 S5 Asphere -2.5174 1.0961 1.64，23.53 -10.3465 S6 Asphere -1.5298 0.5675 -3.8225 STO Sphere Infinity 0.1143 S7 Asphere 3.2756 0.9000 1.544，56.11 -2.3189 S8 Asphere -1.7997 0.0300 2.4858 S9 Asphere 3.0067 0.2920 1.671，19.24 -28.7151 S10 Asphere 0.7070 0.0050 1.52，60.0 -0.8988 S11 Asphere 0.7070 1.0541 1.544，56.11 -0.8988 S12 Asphere -4.1266 0.2964 10.2321 S13 Sphere Infinity 0.2100 1.517，64.2 S14 Sphere Infinity 0.4850 S15 Sphere Infinity

[0154] It should be noted that the materials in Table 3 include refractive index and Abbe number. For example, in Table 3, the materials 1.772 and 49.61 for S1 indicate that the refractive index of the first lens E1 is 1.772 and the Abbe number is 49.61, respectively.

[0155] Table 4 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S2 to S12 in Example 2.

[0156] Table 4. Aspherical coefficients of the optical imaging lens in Example 2

[0157]

[0158]

[0159] like Figures 6A to 6C As shown, Figure 6A The diagram shows the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to the above-described embodiment 2 of this application. Figure 6B The diagram shows the astigmatism curves of the optical imaging lens under three operating conditions according to the above-described embodiment 2 of this application. Figure 6C A schematic diagram showing the relative illumination curves of the optical imaging lens under three operating conditions according to the above-described embodiment 2 of this application is illustrated. Figures 6A to 6C It can be seen that the optical imaging lens in the three working conditions of Example 2 has good imaging quality.

[0160] Example 3

[0161] like Figure 2 and Figures 7A to 7C As shown, the optical imaging lens in Embodiment 3 has the same number of lenses and the same optical power distribution as in Embodiment 1 or Embodiment 2, but the surface shape of the lens in Embodiment 3 is different from that of the lens in Embodiment 1 or Embodiment 2.

[0162] In Embodiment 3, the first lens E1 has negative optical power, the object-side surface S1 of the first lens E1 is convex, and the image-side surface S2 of the first lens E1 is concave; the second lens E2 has negative optical power, the object-side surface S3 of the second lens E2 is convex, and the image-side surface S4 of the second lens E2 is concave; the third lens E3 has positive optical power, the object-side surface S5 of the third lens E3 is convex, and the image-side surface S6 of the third lens E3 is convex; the fourth lens E4 has positive optical power, the object-side surface S7 of the fourth lens E4 is convex, and the image-side surface S8 of the fourth lens E4 is convex; the fifth lens E5 has negative optical power, the object-side surface S9 of the fifth lens E5 is concave, and the image-side surface S10 of the fifth lens E5 is concave; the sixth lens E6 has positive optical power, the object-side surface S11 of the sixth lens E6 is convex, and the image-side surface S12 of the sixth lens E6 is convex.

[0163] In this embodiment, the fifth lens E5 is cemented together with the fourth lens E4.

[0164] Furthermore, in this embodiment, the object side of the fifth lens E5 contacts the image side of the third spacer element P3, and the object side of the sixth lens E6 contacts the fifth spacer element P5. The fifth spacer element P5 is arranged at intervals with the image side stop step of the lens barrel. In other words, the fifth spacer element P5 is located between the fifth lens E5 and the sixth lens E6 and plays a supporting role.

[0165] It is worth noting that in this embodiment, the basic optical parameters (lens shape, radius of curvature, thickness, material and conic coefficient) of the optical imaging lens are the same under the three working conditions. The difference lies in some structural data, such as the spacing between the non-effective diameter regions of the lens, the shape of the spacer element, the arrangement of the spacer element, etc., specifically including parameters: d3m, D3s, d5m, D5s, d0s, d0m, D0s, D0m, CP3, CP5, L, OD6, OD4, EB5, SP5, OD5.

[0166] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Embodiment 3, wherein the units of radius of curvature, thickness / distance and effective radius are all millimeters (mm).

[0167] Table 5 Optical parameters of the optical imaging lens in Example 3

[0168] Face number Face type Radius of curvature Thickness Material Conic constant OBJ Sphere Infinity 1005.0000 S1 Sphere 7.0000 0.5000 1.77，49.6 S2 Sphere 2.0650 1.1988 S3 Asphere 2.6849 0.6013 1.535，55.65 0.7694 S4 Asphere 0.6741 1.2360 -0.6188 S5 Asphere 6.9339 1.0897 1.661，20.37 -35.5515 S6 Asphere -5.3006 0.4285 0.4347 STO Sphere Infinity 0.0010 S7 Asphere 1.0064 0.8548 1.55，55.9 -0.5715 S8 Asphere -1.8549 0.0010 1.52，60.0 2.8792 S9 Asphere -1.8549 0.2400 1.68，19.2 2.8792 S10 Asphere 1.5065 0.1693 -3.3407 S11 Asphere 0.8552 0.6977 1.55，55.9 -1.0140 S12 Asphere -7.51906 0.2952 -56.0530 S13 Sphere Infinity 0.2111 1.517，64.2 S14 Sphere Infinity 0.4874 S15 Sphere Infinity

[0169] It should be noted that the materials in Table 5 include refractive index and Abbe number. For example, in Table 5, the materials 1.772 and 49.61 for S1 indicate that the refractive index of the first lens E1 is 1.772 and the Abbe number is 49.61, respectively.

[0170] Table 6 below shows the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 that can be used for each aspherical mirror S2 to S12 in Example 3.

[0171] Table 6. Aspherical coefficients of the optical imaging lens in Example 3

[0172] Face number A4 A6 A8 A10 A12 A14 A16 S1 -8.84E-02 9.76E-03 -2.78E-02 2.14E-01 -4.14E-01 4.28E-01 -2.76E-01 S2 -7.90E-02 -8.61E-01 5.72E+00 -2.90E+01 1.08E+02 -2.61E+02 3.95E+02 S3 -6.94E-02 -5.50E-01 4.70E+00 -2.63E+01 9.76E+01 -2.42E+02 3.96E+02 S4 -2.92E-01 -1.15E-01 4.79E+00 -3.58E+01 1.65E+02 -5.21E+02 1.17E+03 S5 -2.39E-01 4.24E-01 -2.50E+00 1.29E+01 -4.33E+01 9.23E+01 -1.21E+02 S6 -3.55E+00 2.89E+01 -1.38E+02 4.67E+02 -1.12E+03 1.87E+03 -2.04E+03 S7 -3.55E+00 2.89E+01 -1.38E+02 4.67E+02 -1.12E+03 1.87E+03 -2.04E+03 S8 -1.65E+00 1.02E+01 -4.43E+01 1.43E+02 -3.33E+02 5.36E+02 -5.61E+02 S9 -1.19E+00 4.73E+00 -1.82E+01 5.00E+01 -6.16E+01 -1.24E+02 7.25E+02 S10 3.26E-01 -6.92E+00 7.86E+01 -5.60E+02 2.68E+03 -8.95E+03 2.13E+04 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.18E-01 -3.29E-02 5.85E-03 -5.97E-04 2.67E-05 0.00E+00 0.00E+00 S2 -3.60E+02 1.80E+02 -3.82E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 -4.09E+02 2.41E+02 -6.17E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S4 -1.87E+03 2.14E+03 -1.70E+03 8.95E+02 -2.79E+02 3.90E+01 0.00E+00 S5 9.01E+01 -2.90E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S6 1.34E+03 -4.48E+02 4.83E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S7 1.34E+03 -4.48E+02 4.83E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S8 3.41E+02 -9.09E+01 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S9 -1.55E+03 1.90E+03 -1.39E+03 5.65E+02 -9.88E+01 0.00E+00 0.00E+00 S10 -3.65E+04 4.45E+04 -3.79E+04 2.16E+04 -7.58E+03 1.36E+03 -6.98E+01

[0173] like Figures 8A to 8C As shown, Figure 8A The diagram illustrates the on-axis chromatic aberration curves of the optical imaging lens under three operating conditions according to Embodiment 3 of this application. Figure 8B The diagram shows the astigmatism curves of the optical imaging lens under three operating conditions according to Embodiment 3 of this application. Figure 8C A schematic diagram showing the relative illumination curves of the optical imaging lens under three operating conditions according to Embodiment 3 of this application is illustrated. Figures 8A to 8C It can be seen that the optical imaging lens in the three working conditions of Example 3 has good imaging quality.

[0174] The optical parameters of Examples 1 to 3 are shown in Table 7. Semi-FOV is half of the maximum field of view of the optical imaging lens, EPD is the entrance pupil diameter of the optical imaging lens, f is the effective focal length of the optical imaging lens, f45 is the effective focal length of the fourth and fifth lenses cemented together, and f56 is the combined focal length of the fifth and sixth lenses cemented together.

[0175] Table 7 Optical parameters of Examples 1 to 3

[0176] Optical parameters Example 1 Example 2 Example 3 Semi-FOV (°) 103.50 103.50 103.50 EPD (mm) 0.45 0.41 0.44 f (mm) 0.61 0.56 0.59 f1 (mm) -3.35 -3.58 -3.95 f2 (mm) -2.99 -2.04 -1.87 f3 (mm) 3.35 4.22 4.67 f45 (mm) / / 4.81 f56 (mm) -105.87 5.90 /

[0177] Some structural data from Examples 1 to 3 are shown in Table 8 (all parameters in the table are in mm):

[0178] Table 8. Structural parameter data for each working condition in Examples 1 to 3.

[0179]

[0180]

[0181] The data from Examples 1 to 3 satisfy the following relationship:

[0182] Table 9. Relationships satisfied by optical imaging lenses

[0183] Conditional expression \ data 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 (d0s - d5s) / d0m 2.72 2.41 2.50 2.85 2.48 3.08 2.42 2.37 2.55 EB5 / (CT5 + N5) 4.14 4.28 4.50 4.91 4.75 5.09 4.55 4.34 3.21 d0s / d0m * tan (Semi-FOV / 2) 5.22 4.71 4.74 5.29 4.70 5.47 4.70 4.63 4.76 d0s / (f1 / N1) -4.51 -4.61 -4.48 -4.46 -4.34 -4.51 -3.83 -3.90 -3.77 D0s / L 1.54 1.53 1.44 1.64 1.58 1.66 1.53 1.50 1.55 EB5 / (CT5 + CT6) 0.76 0.78 0.82 0.64 0.62 0.66 0.69 0.66 0.49 CT6 / CP5 3.75 3.75 3.52 3.09 2.95 3.03 2.38 2.15 1.62 (EB5 - CT5) / SP5 2.25 2.38 2.58 1.03 0.98 1.09 1.89 1.74 1.01 (D5s - d5m) / CP5 1.23 1.59 0.81 1.27 1.44 0.56 3.05 2.64 1.45 L / (f / EPD) 4.27 4.36 4.48 4.28 4.30 4.29 4.43 4.58 4.30 |(R9) | + |R10) | / N5 5.46 5.46 5.46 2.22 2.22 2.22 2.00 2.00 2.00 OD5 / ODi (i = 4 or 6) 1.48 1.56 1.45 1.24 1.29 1.14 1.47 1.52 1.41 (R11 + R12) / D0m -0.51 -0.46 -0.51 -0.90 -0.96 -0.92 -1.81 -1.83 -1.87 (D3s - d3m) / CP3 2.17 3.04 2.35 1.90 2.37 1.51 0.56 0.77 0.46 |(R7 / R6) | + CP3 / T34 6.06 5.79 6.43 3.69 3.58 3.71 3.23 3.08 3.36

[0184] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0185] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that: It includes a lens barrel, a lens group and a spacer component accommodated within the lens barrel; The inner diameter of the object side of the lens barrel is larger than the inner diameter of the image side; The lens group includes, arranged in sequence from the object side to the image side along the optical axis of the optical imaging lens: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The fifth lens is cemented to the fourth lens or the sixth lens. Each lens of the lens group has an effective diameter region for refracting light and a non-effective diameter region extending away from the optical axis from the effective diameter region; The spacer component includes a second spacer element placed on the image side of the second lens and in contact with the image side surface of the second lens, a third spacer element placed on the image side of the third lens and in contact with the image side surface of the third lens, and a fifth spacer element placed on the image side of the fifth lens and in contact with the image side surface of the fifth lens. The optical imaging lens satisfies: 2.35 < (d0s - D5s) / d0m < 3.10; 3.20 < EB5 / CT5 * N5 < 5.10; Where, d0s is the inner diameter of the object side of the lens barrel, D5s is the outer diameter of the object side of the fifth spacer element, d0m is the inner diameter of the image side of the lens barrel, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the central thickness of the fifth lens, and N5 is the refractive index of the fifth lens.

2. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 4.60 < d0s / d0m * tan(Semi-FOV / 2) < 5.50; Where, d0s is the inner diameter of the object side of the lens barrel, d0m is the inner diameter of the image side of the lens barrel, and Semi-FOV is half of the maximum field angle of the optical imaging lens.

3. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: -4.65 < d0s / (f1 / N1) < -3.75; Where, d0s is the inner diameter of the object side of the lens barrel, f1 is the effective focal length of the first lens, and N1 is the refractive index of the first lens.

4. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.40 < D0s / L < 1.70; Where, D0s is the outer diameter of the object side of the lens barrel, and L is the maximum height of the lens barrel.

5. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.45 < EB5 / (CT5 + CT6) < 0.85; Where, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

6. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.60 < CT6 / CP5 ≤ 3.75; Where, CT6 is the central thickness of the sixth lens, and CP5 is the maximum thickness of the fifth spacer element.

7. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 4.28 ≤ L / (f / EPD) ≤ 4.56; Where, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging lens, and EPD is the entrance pupil diameter of the optical imaging lens.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 1.95 < (|R9| + |R10|) / N5 < 5.50, 1.10 < OD5 / ODi < 1.60, i = 4 or 6; Wherein, R9 is the radius of curvature of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens, N5 is the refractive index of the fifth lens, OD5 is the maximum outer diameter of the fifth lens, OD4 is the maximum outer diameter of the fourth lens cemented to the object side of the fifth lens, and OD6 represents the maximum outer diameter of the sixth lens cemented to the image side of the fifth lens.

9. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: -1.90 < (R11 + R12) / D0m < -0.45; Wherein, R11 is the object-side radius of curvature of the sixth lens, R12 is the image-side radius of curvature of the sixth lens, and D0m is the image-side outer diameter of the lens barrel.

10. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.45 < (D3s - d3m) / CP3 < 3.05; Wherein, D3s is the outer diameter of the object side of the third spacer element, d3m is the inner diameter of the image side of the third spacer element, and CP3 is the maximum thickness of the third spacer element.

11. The optical imaging lens according to claim 10, characterized in that, The optical imaging lens also satisfies: 3.05 < |R7 / R6| + CP3 / T34 < 6.45; Wherein, R7 is the object-side radius of curvature of the fourth lens, R6 is the image-side radius of curvature of the third lens, CP3 is the maximum thickness of the third spacer element, and T34 is the air gap between the third lens and the fourth lens on the optical axis.

12. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens also satisfies: 0.95<(EB5-CT5) / SP5<2.60, 0.55<(D5s-d5m) / CP5<3.06; Wherein, EB5 is the maximum thickness of the non-effective diameter region of the fifth lens, CT5 is the center thickness of the fifth lens, SP5 is the length of the outer peripheral surface of the fifth lens parallel to the optical axis in contact with the lens barrel, D5s is the outer diameter of the object side of the fifth spacer element, d5m is the inner diameter of the image side of the fifth spacer element, and CP5 is the maximum thickness of the fifth spacer element.

Images