Optical imaging lens

Abstract

The invention 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, and d0s-D5s is 3.10, 3.10; 3.20 lt, 3.20 lt; eB5 / CT5 * N5lt; 5.10).

Description

Technical Field

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

[0002] With the improvement of living standards and the enhancement of safety awareness, people have higher requirements for home security. Therefore, consumers generally require that surveillance lenses have a large angle, high resolution, and can obtain bright and clear camera images even in dim environments at night.

[0003] Among the numerous optical imaging lenses applied to the surveillance field, the fisheye lens stands out due to its advantage of a large field of view. In order to receive light as much as possible, the aperture of the outermost lens of the fisheye lens is usually set to be large, and it usually shows a large object end and a small image end in terms of the lens shape, which easily leads to the generation of ghost images, resulting in low imaging quality of the existing fisheye lenses. Although the influence of the ghost images can be weakened by gluing some lenses close to the image side, if the size of the lens supporting the lens after gluing is set unreasonably, it is likely to cause a decline in the imaging quality of the lens and cannot meet the needs of consumers. Summary of the Invention

[0004] One advantage of the present application is to provide an optical imaging lens with more stable imaging performance, which can balance the requirements of weakening ghost images and improving imaging quality.

[0005] The optical imaging lens includes a lens barrel and a lens group and a spacer assembly accommodated within the lens barrel;

[0006] The inner diameter of the object side of the lens barrel is greater than the inner diameter of the image side;

[0007] 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, wherein the fifth lens is glued to the fourth lens or the sixth lens, and each lens of the lens group has an effective diameter region for refracting light and a non-effective diameter region surrounding the effective diameter region;

[0008] The spacer assembly 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:

[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 ineffective 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.

[0012] In some embodiments of the present application, the optical imaging lens further 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 angle of the optical imaging lens.

[0015] In some embodiments of the present application, the optical imaging lens further 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 the present application, the optical imaging lens further satisfies:

[0019] 1.40 < D0s / L < 1.70;

[0020] Wherein, 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 the present application, the optical imaging lens further satisfies:

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

[0023] Wherein, EB5 is the maximum thickness of the ineffective 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.

[0024] In some embodiments of the present application, the optical imaging lens further satisfies:

[0025] 1.60 < CT6 / CP5 ≤ 3.75;

[0026] Wherein, CT6 is the central 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] wherein, 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] wherein, 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 adhesively bonded to the object side surface of the fifth lens, and OD6 represents the maximum outer diameter of the sixth lens adhesively bonded 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] wherein, 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] wherein, 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 curvature radius of the object side surface of the fourth lens, R6 is the curvature radius of the image side surface 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 the present application, the optical imaging lens further 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 central 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 the present application increases the light input 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 glued to the fourth lens or the sixth lens. Since the fifth lens is located at the rear end of the lens barrel (the end close to the image side) and has a large radial step difference with the object side of the lens barrel, the influence of the overall shape of the fifth lens (including the effective diameter region and the non-effective diameter region) on the front and rear air gaps 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, the present application optimizes the shape of the fifth lens by controlling the central thickness CT5 of the fifth lens, the maximum thickness EB5 of the non-effective diameter region of the fifth lens, and the refractive index N5 of the fifth lens. In this way, the fifth lens is stably connected at the bearing position with the lens barrel and is not easily displaced, so that the change amount of the field curvature of the outer field of the 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 glued body and the lens in front or behind the glued body during assembly, thereby improving the problem of peak drop in the outer field of the optical imaging lens during assembly and enhancing the optical performance of the lens. Description of the Drawings

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

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

[0048] Figure 3A is a schematic diagram of an optical imaging lens under working condition 1-1 in the first embodiment of the present application;

[0049] Figure 3BIt is a schematic structural diagram of an optical imaging lens under working conditions 1-2 in Embodiment 1 of the present application;

[0050] Figure 3C It is a schematic structural diagram of an optical imaging lens under working conditions 1-3 in Embodiment 1 of the present application;

[0051] Figure 4A It shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions in Embodiment 1 of the present application;

[0052] Figure 4B It shows a schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions in Embodiment 1 of the present application;

[0053] Figure 4C It shows a schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions in Embodiment 1 of the present application;

[0054] Figure 5A It is a schematic structural diagram of an optical imaging lens under working conditions 2-1 in Embodiment 2 of the present application;

[0055] Figure 5B It is a schematic structural diagram of an optical imaging lens under working conditions 2-2 in Embodiment 2 of the present application;

[0056] Figure 5C It is a schematic structural diagram of an optical imaging lens under working conditions 2-3 in Embodiment 2 of the present application;

[0057] Figure 6A It shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions in Embodiment 2 of the present application;

[0058] Figure 6B It shows a schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions in Embodiment 2 of the present application;

[0059] Figure 6C It shows a schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions in Embodiment 2 of the present application;

[0060] Figure 7A It is a schematic structural diagram of an optical imaging lens under working conditions 3-1 in Embodiment 3 of the present application;

[0061] Figure 7B It is a schematic structural diagram of an optical imaging lens under working conditions 3-2 in Embodiment 3 of the present application;

[0062] Figure 7C It is a schematic structural diagram of an optical imaging lens under working conditions 3-3 in Embodiment 3 of the present application;

[0063] Figure 8A Shows the schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions according to the third embodiment of the present application;

[0064] Figure 8B Shows the schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions according to the third embodiment of the present application;

[0065] Figure 8C Shows the schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions according to the third embodiment of the present application;

[0066] Figure 9A Respectively show the diffraction MTF curve diagrams of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5*N5 = 2.2;

[0067] Figure 9B Respectively show the diffraction MTF curve diagrams of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5*N5 = 5.0;

[0068] Figure 9C Respectively show the diffraction MTF curve diagrams of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5*N5 = 7.0.

[0069] Reference numerals

[0070] E1, the first lens; E2, the second lens; E3, the third lens; E4, the fourth lens; E5, the fifth lens; E6, the sixth lens; P0, the lens barrel; P2, the second spacer element; P3, the third spacer element; P4, the fourth spacer element; P5, the fifth spacer element. Detailed implementation manners

[0071] To better understand the present application, more detailed descriptions of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of the exemplary embodiments of the present application and do not limit the scope of the present 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 expressions such as the first, the second, and the third are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0073] In the drawings, for the sake of clarity, the thickness, dimensions and shape of the lenses are slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0074] As used herein, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface profile in the paraxial region can be made according to the general methods in the art, for example, the concavity or convexity can be determined by the sign of the R value (where R refers to the radius of curvature in the paraxial region). As used herein, the surface of each lens closest to the object being photographed is called the object side surface of the lens, and the surface of each lens closest to the imaging surface 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 "comprises", "comprising", "has", "including" and / or "containing", when used in this specification, denote the presence of the stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when an expression such as "at least one of..." appears after a list of listed features, it modifies the entire list of listed features, rather than modifying a single element in the list. In addition, when describing the embodiments of the present application, the use of "may" means "one or more embodiments of the present application". And the term "exemplary" is intended to refer to an example or illustration.

[0076] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formalized sense unless expressly so defined herein.

[0077] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but should not be construed as a limitation on the patent scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, and these belong to the protection scope of the present application. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0078] As Figure 1 and Figure 2 shown, the present application provides an optical imaging lens, which may include a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the inner diameter of the object side of the lens barrel P0 is greater 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 in sequence from the object side to the image side along the optical axis of the optical imaging lens. The fifth lens E5 is glued to the fourth lens E4 or the sixth lens E6. Each lens of 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 spacer assembly includes a second spacer element P2 placed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a third spacer element P3 placed 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 spacer element P5 placed 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 central 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 glued 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 the center 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 satisfy 3.20 < EB5 / CT5 * N5 < 5.10. In this way, the fifth lens E5 is stably connected to the lens barrel P0 at the bearing position and is not easily displaced, so that the change in 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 in the air gap between the glued body and the lens in front of or behind the glued body during assembly, thereby improving the problem of peak drop in the outer field of view of this optical imaging lens during assembly and enhancing the optical performance of the lens.

[0085] Exemplarily, Figure 9A Respectively show the diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 2.2, Figure 9B Respectively show the diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 5.0, Figure 9C Respectively show the diffraction MTF curve graphs of the optical imaging lens when (d0s - D5s) / d0m = 3.0 and EB5 / CT5 * N5 = 7.0. It can be easily seen from the figure that 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 both 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, the front and rear spacer elements of the fifth lens E5 become thicker, affecting the air gap before and after the glued body, resulting in the right shift of the field curvature of the outer field of view and peak drop; as Figure 9CAs shown, when the relational expression EB5 / CT5*N5 is 7.0, the non-effective diameter region of the fifth lens E5 thickens, the spacer elements before and after the fifth lens E5 adaptively thin, the field curvature of the outer field of the MTF curve slightly shifts to the left, and the peak 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 the present application, the optical imaging lens further 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 angle of the optical imaging lens.

[0089] This helps to 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 head of the optical lens, and the inner diameter d0m of the image side of the lens barrel P0 determines the maximum field of view angle of the optical imaging lens; through the constraint of this conditional expression, a reasonable fit between the object side and the front end face of the lens barrel P0, the image side and the rear end face and the lens group can be achieved, avoiding large misalignments on the assembly bearing surfaces, and thus 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 the present application, the optical imaging lens further satisfies: -4.65 < d0s / (f1 / N1) < -3.75;

[0092] Wherein, d0s is the inner diameter of the object side 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 to 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 to improve the molding processability of the first lens E1, improve the assembly stability, and control the overall size 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, and enhance the imaging quality of the lens.

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

[0095] According to some embodiments of the present application, the optical imaging lens further 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 can expand the usage scenarios of the optical imaging lens. Specifically, since the inner diameter d0s of the object side of the lens barrel P0 can determine the head size of the lens group, 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, which is beneficial to expanding the application scenarios of the lens and enabling the optical imaging lens to be used in more types of electronic devices and devices with strict space limitations.

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

[0099] According to some embodiments of the present application, the optical imaging lens further 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 central thickness of the fifth lens E5, and CT6 is the central thickness of the sixth lens E6.

[0101] This is beneficial to reducing the field curvature variation of the outer field of view after high temperature and high humidity. Specifically, by controlling the relationship between the thickness of the non-effective diameter region of the fifth lens E5, the central thickness of the fifth lens E5, and the central thickness of the sixth lens E6 within a reasonable range, the optimal bearing position can be adopted for the fifth lens E5, thereby improving the assembly stability and being beneficial to reducing the field curvature variation of the outer field of view after high temperature and high humidity.

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

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

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

[0105] This can further reduce the change in field curvature 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 change in field curvature 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] Wherein, 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 also it can affect its cooperation mode and cooperation size 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 the two are in contact with each other along the optical axis direction. The cooperation size 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 curvature radius of the object side surface of the fifth lens E5, R10 is the curvature radius 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 adhesively bonded to the object side surface of the fifth lens E5, and OD6 is the maximum outer diameter of the sixth lens E6 adhesively bonded to the image side surface of the fifth lens E5.

[0112] This can improve the structural strength of the adhesive body in the optical imaging lens. Specifically, by controlling the relationship between the curvature radius of the object side surface, the curvature radius of the image side, the refractive index, the maximum outer diameter of the fifth lens E5, and the maximum outer diameter of the lens adhesively bonded to the object side surface or the image side surface of the fifth lens E5 within a reasonable range, the curvature radii on both sides of the fifth lens E5 can be controlled to be conducive to adhesively bonding with the fourth lens E4 or the sixth lens E6, further restricting 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 restricting the length of the structural region of the fourth lens E4 or the sixth lens E6, which is conducive to ensuring that the bonding surface of the adhesive body is large enough, facilitating adhesively bonding and improving the strength of the adhesive body at the bonding surface.

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

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

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

[0116] This is conducive to improving the assembly stability of the optical imaging lens. Since the curvature radius R11 of the object side surface of the sixth lens E6 can determine the thickness of the fifth spacer element P5, and the curvature radius R12 of the image side surface of the sixth lens E6 can determine the inner diameter of the image side surface of the lens barrel P0, the interval 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, together with the curvature radius of the sixth lens E6, jointly affects the molding difficulty and assembly stability of the lens. When the above conditional formula is satisfied, the smaller the curvature radius R11 of the object side surface 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 the present application, the optical imaging lens further satisfies: 0.45 < (D3s - d3m) / CP3 < 3.05;

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

[0120] In this way, the imaging quality of the optical imaging lens can be improved by reducing stray light. Specifically, the incident light converges between the second lens E2 and the third lens E3, and then diverges and is transmitted to the image side through the fourth lens E4, the fifth lens E5, and the sixth lens E6. By reasonably controlling the outer diameter of the third spacer element P3 near the object side surface and the inner diameter of the third spacer element P3 near the image side surface, the third spacer element P3 can effectively block the stray light in the optical path without affecting the chief ray in the incident light; by reasonably controlling the central thickness of the third lens E3 on the optical axis, it can ensure that the chief ray in the incident light is transmitted along a predetermined path within the third lens E3. The third lens E3 plays a connecting role in the optical path and is crucial for the imaging of the optical imaging lens. By reasonably controlling the surface shape of the third lens E3, the imaging quality of the optical imaging lens can be improved.

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

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

[0123] Wherein, R7 is the curvature radius of the object side surface of the fourth lens E4, R6 is the curvature radius of the image side surface 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 is beneficial to improving the overall stray light quality of the optical imaging lens. The curvature radius R7 of the object side surface of the fourth lens E4 can determine the thickness of the third spacer element P3. Through the constraint of this conditional formula, it helps 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, and the greater the space for improving stray light, which is beneficial to improving 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 the present application, the optical imaging lens further 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 central 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 surface of the fifth spacer element P5, d5m is the inner diameter of the image side surface of the fifth spacer element P5, and CP5 is the maximum thickness of the fifth spacer element P5.

[0128] This is beneficial to reducing the risk of stray light. Specifically, by controlling the central thickness, the thickness of the structural region of the fifth lens E5, and the length of the contact with the lens barrel P0, the stability of the fifth lens E5 in contact is facilitated. Further, by combining and restricting the inner and outer diameters and the thickness of the fifth spacer element P5, the excess light at the edge after passing through the fifth lens E5 can be blocked, 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 solution claimed in the present application, the number of spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification, and the present application does not make specific limitations thereto. For example, according to needs, the optical imaging lens may also include other numbers of spacer elements different from those described in the above embodiments.

[0131] Some specific but non-limiting embodiments of the above-described embodiments of the present application will be described in more detail with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object surface of the optical imaging lens, STO represents the surface of the aperture stop, S1 represents the object side surface of the first lens E1, S2 represents the image side surface of the first lens E1, S3 represents the object side surface of the second lens E2, S4 represents the image side surface of the second lens E2, S5 represents the object side surface of the third lens E3, S6 represents the image side surface of the third lens E3, S7 represents the object side surface of the fourth lens E4, S8 represents the image side surface of the fourth lens E4, S9 represents the object side surface of the fifth lens E5, S10 represents the image side surface of the fifth lens E5, S11 represents the object side surface of the sixth lens E6, S12 represents the image side surface of the sixth lens E6, S13 represents the object side surface of the filter in the photosensitive component behind the lens, S14 represents the image side surface of the filter in the photosensitive component behind the lens, and S15 represents the light receiving surface of the photosensitive chip in the photosensitive component behind the lens. In addition, Aj represents the j-th order aspheric coefficient, where j = 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30.

[0132] Embodiment 1

[0133] As Figure 1 And Figures 3A to 3C shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated within the lens barrel P0; the inner diameter of the object side surface of the lens barrel P0 is greater than the inner diameter of the image side surface; the lens group includes, arranged in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6, where the sixth lens E6 is glued to the fifth lens E5, a radially extending stop step is provided on the image side of the lens barrel P0, and the image side surface of the sixth lens E6 abuts against this stop step in the optical axis direction; the spacer assembly includes a second spacer element P2 placed on the image side of the second lens E2 and in contact with the image side surface S4 of the second lens E2, a third spacer element P3 placed on the image side of the third lens E3 and in contact with the image side surface S6 of the third lens E3, a fourth spacer element P4 placed on the image side of the fourth lens E4 and in contact with the image side surface S8 of the fourth lens E4, and a fifth spacer element P5 placed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5, and the image side surface of this fifth spacer element P5 also contacts the stop step on the lens barrel P0 to form a support for the fifth lens E5.

[0134] In this embodiment, the first lens E1 has a 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 a 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 a 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 a 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 a 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 a 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 should be noted that in this embodiment, the basic optical parameters (surface type, curvature radius, thickness, material, and conic coefficient of the lens) of the optical imaging lens under three working conditions are the same. The differences lie in some structural data, such as the intervals between the non-effective diameter regions of the lenses, the shapes of the spacer elements, the arrangements of the spacer elements, etc. Specifically, the parameters include: 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. Among them, the units of the curvature radius, the central thickness / distance, and the effective radius are all millimeters (mm).

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

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

[0139] It should be noted that the materials in Table 1 include the refractive index and the Abbe number. For example, the materials 1.772 and 49.61 of S1 in Table 1 represent 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 the image side surface of any one of the second lens E2 to the sixth lens E6 are aspherical surfaces. The surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0141]

[0142] Wherein, x is the sagitta, which is the distance from the vertex of the aspheric surface to the position along the optical axis at a height of h; c is the paraxial curvature of the aspheric 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 constant; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 for each aspheric mirror surface S2 to S12 in the first embodiment. In subsequent embodiments, the surface profile of the aspheric lens of the optical imaging lens also satisfies the limitation of the above formula.

[0143] Table 2: Aspheric Coefficient Table of the Optical Imaging Lens in the First Embodiment

[0144] Surface 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 Surface 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] As Figures 4A to 4C shown, Figure 4A shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions according to the above-mentioned first embodiment of the present application, Figure 4B shows a schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions according to the above-mentioned first embodiment of the present application, Figure 4C shows a schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions according to the above-mentioned first embodiment of the present application. According to Figures 4A to 4C it can be seen that the optical imaging lens in the three working conditions of the first embodiment has good imaging quality.

[0146] Second Embodiment

[0147] As Figure 1 and Figures 5A to 5C shown, the optical imaging lens in the second embodiment and the first embodiment has the same number of lenses, the same number of spacer elements, and the same positive and negative distribution of the optical power. However, there are differences in the surface profiles of the lenses in the second embodiment and the first embodiment.

[0148] In Embodiment 2, the first lens E1 has a 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 a 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 a 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 a 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 a 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 a 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 Embodiment 2, the fifth lens E5 is also cemented to the sixth lens E6.

[0150] It should be noted that in this embodiment, the basic optical parameters (surface type, radius of curvature, thickness, material, and conic coefficient of the lens) of the optical imaging lens under three working conditions are the same. The differences lie in some structural data, such as the intervals between the non-effective diameter regions of the lenses, the shapes of the spacer elements, the arrangements of the spacer elements, etc. Specifically, the parameters include: 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. Among them, the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0152] Table 3 Optical Parameter Table of the Optical Imaging Lens of Embodiment 2

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

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

[0155] The following Table 4 gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical mirror surface S2 to S12 in Embodiment 2.

[0156] Table 4 Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment 2

[0157]

[0158]

[0159] As Figures 6A to 6C shown Figure 6A shown is a schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions according to the second embodiment of the present application. Figure 6B shown is a schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions according to the second embodiment of the present application. Figure 6C shown is a schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions according to the second embodiment of the present application. According to Figures 6A to 6C it can be seen that the optical imaging lens in the three working conditions of the second embodiment has good imaging quality.

[0160] Embodiment Three

[0161] As Figure 2 well as Figures 7A to 7C shown, the optical imaging lens in Embodiment Three has the same number of lenses and the same power distribution as that in Embodiment One or Embodiment Two, but there are differences in the surface shape of the lenses in Embodiment Three from those in Embodiment One or Embodiment Two.

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

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

[0164] In addition, in this embodiment, the object side of the fifth lens E5 contacts the image side of the third spacer element P3, the object side of the sixth lens E6 contacts the fifth spacer element P5, and the fifth spacer element P5 is spaced from 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 should be noted that in this embodiment, the basic optical parameters (surface shape, radius of curvature, thickness, material, and conic coefficient of the lens) of the optical imaging lens under the three working conditions are the same. The differences lie in some structural data, such as the interval between the non-effective diameter regions of the lens, the shape of the spacer element, the arrangement of the spacer element, etc. Specifically, the parameters include: 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, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0167] Table 5 Optical Parameter Table of the Optical Imaging Lens of Embodiment 3

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

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

[0170] The following Table 6 gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspherical mirror surface S2 to S12 in Embodiment 3.

[0171] Table 6 Aspherical Coefficient Table of the Optical Imaging Lens of Embodiment 3

[0172] Surface 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 Surface 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] As Figures 8A to 8C shown, Figure 8A shows a schematic diagram of the axial chromatic aberration curve of the optical imaging lens under three working conditions according to Embodiment 3 of the present application. Figure 8B shows a schematic diagram of the astigmatism curve of the optical imaging lens under three working conditions according to the above Embodiment 3 of the present application. Figure 8C shows a schematic diagram of the relative illumination curve of the optical imaging lens under three working conditions according to the above Embodiment 3 of the present application. According to Figures 8A to 8C it can be seen that the optical imaging lens in the three working conditions of Embodiment 3 has good imaging quality.

[0174] The optical parameters of Embodiment 1 to Embodiment 3 are shown in Table 7. Semi-FOV is half of the maximum field of view angle 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 when the fourth lens and the fifth lens are cemented, and f56 is the combined focal length when the fifth lens and the sixth lens are cemented:

[0175] Table 7 Optical Parameters of Embodiment 1 to Embodiment 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] Partial structural data of Embodiment 1 to Embodiment 3 are shown in Table 8 (the unit of each parameter in the table is mm):

[0178] Table 8 Structural Parameter Data Sheet Corresponding to Each Working Condition of Embodiment 1 to Embodiment 3

[0179]

[0180]

[0181] The data of Embodiment 1 to Embodiment 3 satisfy the following relationships:

[0182] Table 9 Relationship Formula Table Satisfied by the Optical Imaging Lens

[0183] Condition formula / 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 arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification.

[0185] The above embodiments only express several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to 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 greater 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; 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 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, wherein: The optical imaging lens further satisfies: 4.60 < d0s / d0m*tan(Semi-FOV / 2) < 5.50; 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 angle of the optical imaging lens.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens further satisfies: -4.65 < d0s / (f1 / N1) < -3.75; 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.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens further satisfies: 1.40 < D0s / L < 1.70; Wherein, 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, wherein: The optical imaging lens further satisfies: 0.45 < EB5 / (CT5 + CT6) < 0.85; Wherein, 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, wherein: The optical imaging lens further satisfies: 1.60 < CT6 / CP5 ≤ 3.75; Wherein, 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, wherein: The optical imaging lens further satisfies: 4.28 ≤ L / (f / EPD) ≤ 4.56; Wherein, 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, wherein: The optical imaging lens further satisfies: 1.95 < (|R9| + |R10|) / N5 < 5.50, 1.10 < OD5 / ODi < 1.60, i = 4 or 6; Among them, 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.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens also meets the following requirements: -1.90<(R11+R12) / D0m<-0.45; Among them, 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.

10. The optical imaging lens according to claim 1, wherein: The optical imaging lens also meets the following requirements: 0.45<(D3s-d3m) / CP3<3.05; Wherein, D3s is the outer diameter of the object side of the third spacing element, d3m is the inner diameter of the image side of the third spacing element, and CP3 is the maximum thickness of the third spacing element.

11. The optical imaging lens according to claim 10, wherein: The optical imaging lens also meets the following requirements: 3.05<|R7 / R6|+CP3 / T34<6.45; Among them, R7 is the curvature radius of the object side of the fourth lens, R6 is the curvature radius of the image side of the third lens, CP3 is the maximum thickness of the third spacing 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, wherein: The optical imaging lens also meets the following requirements: 0.95<(EB5-CT5) / SP5<2.60, 0.55<(D5s-d5m) / CP5<3.06; Among them, EB5 is the maximum thickness of the non-effective diameter area 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 spacing element, d5m is the inner diameter of the image side of the fifth spacing element, and CP5 is the maximum thickness of the fifth spacing element.

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