Optical imaging lens

Abstract

The invention discloses an optical imaging lens. The optical imaging lens comprises an imaging lens group and a spacing element group which are arranged in a lens barrel, the imaging lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from the object side to the image side along the optical axis; the spacing element group comprises a fifth spacing element arranged on the image side of the fifth lens; the optical imaging lens satisfies the following conditions: 68.00 degree lt; the Semi-FOV is less than or equal to 74.24 degrees, (R12 + R9) / (R12-R9) is more than or equal to 0.76 and less than or equal to 2.46, and (D5s-d5s) / CP5 is more than or equal to 0.94 and less than or equal to 2.73; the Semi-FOV is the maximum half field angle of the optical imaging lens, the R9 is the curvature radius of the object side surface of the fifth lens, the R12 is the curvature radius of the image side surface of the sixth lens, the D5s is the outer diameter of the object side surface of the fifth spacing element, the d5s is the inner diameter of the object side surface of the fifth spacing element, and the CP5 is the maximum thickness of the fifth spacing element.

Description

Technical Field

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

[0002] In recent years, with the ever-changing consumer demands, the requirements for optical imaging lenses have gradually become more complex and diverse. In different application scenarios, the performance of optical imaging lenses varies. For a six-piece wide-angle lens, it is usually necessary to reasonably distribute the surface shapes of the last two lenses (i.e., the fifth lens and the sixth lens) so that light can smoothly transition to the photosensitive chip behind the lens, thereby ensuring that the lens achieves good wide-angle characteristics.

[0003] However, when ensuring the wide-angle characteristics and adjusting the object side of the fifth lens and the image side of the sixth lens to an extent that allows light to smoothly transition to the rear, the contact area between the fifth spacer between the fifth lens and the sixth lens and the fifth lens and the sixth lens will be too large, resulting in a large misalignment prone to occur on the assembly bearing surface.

[0004] In addition, simply reducing the contact area between the fifth spacer and the fifth lens and the sixth lens by expanding the inner diameter of the fifth spacer will allow steep marginal light to enter the rear optical system, thereby affecting the sensitivity of the lens. Summary of the Invention

[0005] One aspect of this application provides such an optical imaging lens, which includes a lens barrel and an imaging lens group and a spacer element group disposed within the lens barrel. The imaging lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The spacer element group includes a fifth spacer element, and the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. Among them, the number of lenses with optical power in the optical imaging lens is six. This optical imaging lens satisfies: 68.00° < Semi-FOV ≤ 74.24°, 0.76 ≤ (R12 + R9) / (R12 - R9) ≤ 2.46, 0.94 ≤ (D5s - d5s) / CP5 ≤ 2.73. Wherein, Semi-FOV is the maximum semi-field angle of the optical imaging lens, R9 is the curvature radius of the object side surface of the fifth lens, R12 is the curvature radius of the image side surface of the sixth lens, D5s is the outer diameter of the object side surface of the fifth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, and CP5 is the maximum thickness of the fifth spacer element along the optical axis direction.

[0006] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.74≤TD*tan(Semi-FOV) / D0m≤2.56. Wherein, TD is the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, D0m is the outer diameter of the image side end surface of the lens barrel, and Semi-FOV is the maximum half field angle of the optical imaging lens.

[0007] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.79≤D0m / d5m≤2.29, wherein D0m is the outer diameter of the image side end surface of the lens barrel, and d5m is the inner diameter of the image side surface of the fifth spacer element.

[0008] According to an exemplary embodiment of the present application, the spacer element group further includes a fifth sub-spacer element, which is disposed on the image side of the fifth spacer element and at least partially in contact with the image side surface of the fifth spacer element. The optical imaging lens satisfies: 0.16≤∑CP5 / (CT5+T56+CT6)≤0.30. Wherein, ∑CP5 is the sum of the maximum thickness of the fifth spacer element and the fifth sub-spacer element along the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

[0009] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element, which is disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens. The optical imaging lens satisfies: -1.97≤R9 / R10≤-1.50, 0.83≤D4m / D5s≤1.14. Wherein, R9 is the radius of curvature of the object side surface of the fifth lens, R10 is the radius of curvature of the image side surface of the fifth lens, D4m is the outer diameter of the image side surface of the fourth spacer element, and D5s is the outer diameter of the object side surface of the fifth spacer element.

[0010] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.84≤CT4 / (T45+CP4)≤3.04, wherein CT4 is the center thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacing element along the optical axis.

[0011] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens. The optical imaging lens satisfies: 2.37≤D0s / d1s≤2.97. Wherein, D0s is the outer diameter of the object side end surface of the lens barrel, and d1s is the inner diameter of the object side surface of the first spacer element.

[0012] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: -7.38≤f1 / EP01≤-5.19, wherein f1 is the effective focal length of the first lens, and EP01 is the distance from the object side end surface of the lens barrel to the object side surface of the first spacing element along a direction parallel to the optical axis.

[0013] According to an exemplary embodiment of the present application, the spacer element group further includes a third spacer element, which is disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The optical imaging lens satisfies: -1.23≤R6 / d3s≤-0.72. R6 is the radius of curvature of the image side surface of the third lens, and d3s is the inner diameter of the object side surface of the third spacer element.

[0014] According to an exemplary embodiment of the present application, the spacer element group further includes a second spacer element, which is disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens. The optical imaging lens satisfies: -0.34≤(d3s-d2m) / EP23≤1.94. Wherein, d3s is the inner diameter of the object side surface of the third spacer element, d2m is the inner diameter of the image side surface of the second spacer element, and EP23 is the spacing distance from the second spacer element to the third spacer element along the direction parallel to the optical axis.

[0015] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56. Wherein, EP23 is the spacing distance between the second spacing element and the third spacing element along the direction parallel to the optical axis, CT3 is the center thickness of the third lens on the optical axis, and N3 is the refractive index of the third lens.

[0016] According to an exemplary embodiment of the present application, the spacer element group further includes a fourth spacer element and a sixth spacer element, the fourth spacer element is arranged on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens, and the sixth spacer element is arranged on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. The optical imaging lens satisfies: 0.07≤(EP45+EP56) / f56≤0.27. Among them, EP45 is the spacing distance from the fourth spacer element to the fifth spacer element along the direction parallel to the optical axis, EP56 is the spacing distance from the fifth spacer element to the sixth spacer element along the direction parallel to the optical axis, and f56 is the combined focal length of the fifth lens and the sixth lens.

[0017] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.87≤(L-∑EP) / ∑AT≤1.49. Wherein, L is the maximum height of the lens barrel along the optical axis, ∑EP is the sum of the spacing distances between any two adjacent spacing elements in the spacing element group along the direction parallel to the optical axis, and ∑AT is the sum of the spacing distances between any two adjacent lenses in the imaging lens group on the optical axis.

[0018] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 5.67≤L / (CT1+T12)≤6.04, wherein L is the maximum height of the lens barrel along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and T12 is the spacing distance between the first lens and the second lens on the optical axis.

[0019] The optical imaging lens provided in the present application adopts six lenses, and by limiting the maximum half field angle within a certain range, the optical imaging lens has a large field angle, and by adjusting the curvature radius of the object side of the fifth lens and the curvature radius of the image side of the sixth lens, the light can pass through the fifth lens and the sixth lens smoothly, ensuring that the optical imaging lens achieves good wide-angle characteristics. And under the state of ensuring that the lens achieves wide-angle characteristics, by reasonably designing the fifth spacing element, the proportional relationship between the inner and outer diameter difference of the fifth spacing element and the maximum thickness of the fifth spacing element along the optical axis direction is controlled within a certain range, which can avoid the problem of large misalignment of the assembly bearing surface caused by the excessive contact area between the fifth spacing element and the fifth lens and the sixth lens, and can also avoid the inner diameter of the fifth spacing element being too large to affect the sensitivity of the lens. The optical imaging lens satisfies 0.94≤(D5s-d5s) / CP5≤2.73 to ensure the assembly sensitivity of the optical imaging lens and improve the assembly stability of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0021] Figure 1 A parameter annotation diagram of an optical imaging lens according to an embodiment of the present application is shown;

[0022] Figure 2 A schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application is shown;

[0023] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application is shown;

[0024] Figure 4 A schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown;

[0025] Figure 5 , Figure 6 , Figure 7 , Figure 8 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens according to Embodiment 1, 2 or 3 of the present application are respectively shown;

[0026] Fig. 9 A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0027] Fig.10 A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0028] Fig.11 A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown;

[0029] Fig.12 , Fig.13 , Fig.14 , Fig.15 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens according to Embodiment 4, 5 or 6 of the present application are respectively shown;

[0030] Fig.16 A schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application is shown;

[0031] Fig.17 A schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application is shown;

[0032] Fig.18 A schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application is shown;

[0033] Fig.19 , Fig. 20 , Fig.21 , Fig. 22 The magnification chromatic aberration curve, the axial chromatic aberration curve, the astigmatism curve and the distortion curve of the optical imaging lens according to Embodiment 7, 8 or 9 of the present application are respectively shown;

[0034] Fig.23 The defocus curve when the optical imaging lens satisfies Semi-FOV=71°, (R12+R9) / (R12-R9)=1.5 and (D5s-d5s) / CP5=1.78 is shown;

[0035] Fig.24 The defocus curve when the optical imaging lens satisfies Semi-FOV=71°, (R12+R9) / (R12-R9)=1.5 and (D5s-d5s) / CP5=2.51 is shown;

[0036] Fig.25 The defocus curve when the optical imaging lens satisfies Semi-FOV=71°, (R12+R9) / (R12-R9)=1.5 and (D5s-d5s) / CP5=0.75 is shown;

[0037] Fig.26 The defocus curve of the optical imaging lens when Semi-FOV=71°, (R12+R9) / (R12-R9)=1.5 and (D5s-d5s) / CP5=3.02 is shown. DETAILED DESCRIPTION

[0038] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0039] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] In the 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 shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0041] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the 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 surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the image plane is called the image side of the lens.

[0042] The optical imaging lens of the exemplary embodiment of the present application can be simulated by software and / or tools such as ZEMAX and CODEV. Alternatively, the optical imaging lens can be simulated by CODEV software. In the process of simulation using the above software and / or tools, the surface shape of each lens can be appropriately adjusted according to the surface shape model of the software and / or tool used.

[0043] It should also be understood that the terms "including" and / or "having", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when describing the embodiments of the present application, the term "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0044] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] For a six-piece wide-angle lens, it is usually necessary to reasonably distribute the surface shapes of the last two lenses so that the light can smoothly transition to the photosensitive chip behind the lens. In other words, for a six-piece wide-angle lens, it is usually necessary to adjust the curvature radius of the fifth lens and the curvature radius of the sixth lens so that the light can smoothly pass through the fifth lens and the sixth lens, thereby ensuring that the lens achieves good wide-angle characteristics. However, when the object side of the fifth lens and the image side of the sixth lens are adjusted to a degree that allows the light to smoothly transition to the rear while ensuring the wide-angle characteristics, the contact area between the fifth spacer between the fifth lens and the sixth lens and the fifth lens and the sixth lens will be too large, causing the assembly bearing surface to be easily misaligned. In addition, blindly reducing the contact area between the fifth spacer and the fifth lens and the sixth lens by expanding the inner diameter of the fifth spacer will allow steep edge light to enter the rear optical system, thereby affecting the sensitivity of the lens.

[0047] The first aspect of the present application provides an optical imaging lens, which may include an imaging lens group, a spacer element group, and a lens barrel. Among them, the imaging lens group and the spacer element group are disposed in the lens barrel. The imaging lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis. The optical imaging lens satisfies: 68.00° < Semi-FOV ≤ 74.24° and 0.76 ≤ (R12 + R9) / (R12 - R9) ≤ 2.46. The optical imaging lens according to the present application has a large field of view angle. By adjusting the curvature radius of the object side surface of the fifth lens and the curvature radius of the image side surface of the sixth lens, the light can pass through the fifth lens and the sixth lens smoothly, ensuring that the lens achieves good wide-angle characteristics.

[0048] In one embodiment, the spacer element group may include a fifth spacer element, which is disposed on the image side of the fifth lens and is at least partially in contact with the image side surface of the fifth lens. The optical imaging lens may satisfy: 0.94 ≤ (D5s - d5s) / CP5 ≤ 2.73, where D5s is the outer diameter of the object side surface of the fifth spacer element, d5s is the inner diameter of the object side surface of the fifth spacer element, and CP5 is the maximum thickness of the fifth spacer element along the optical axis direction. By reasonably designing the fifth spacer element and controlling the ratio of the difference between the outer and inner diameters of the fifth spacer element to the maximum thickness of the fifth spacer element along the optical axis direction within a certain range, it can not only avoid the problem that the contact area between the fifth spacer element and the fifth lens and the sixth lens is too large, resulting in large misalignment on the assembly bearing surface, but also avoid the inner diameter of the fifth spacer element being too large and affecting the sensitivity of the lens. Satisfying 0.94 ≤ (D5s - d5s) / CP5 ≤ 2.73 can ensure the assembly sensitivity of the lens group and improve the assembly stability of the lens.

[0049] Fig.23 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 1.78 is shown. Fig.24 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 2.51 is shown. Fig.25 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 0.75 is shown. Fig.26 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 3.02 is shown.

[0050] Combined with Fig.23 、 Fig.24 、 Fig.25 and Fig.26It can be seen that when the optical imaging lens satisfies (D5s-d5s) / CP5=1.78, the defocus curve performs better, and when the optical imaging lens satisfies (D5s-d5s) / CP5=2.51, the defocus curve performs better. When the optical imaging lens satisfies (D5s-d5s) / CP5=0.75, the bearing stability of the lens decreases, resulting in increased defocus in the external field of view. When the optical imaging lens satisfies (D5s-d5s) / CP5=3.02, the light refraction is steep and the external field of view peak decreases. Therefore, when the optical imaging lens satisfies 0.94≤(D5s-d5s) / CP5≤2.73, the assembly sensitivity of the optical imaging lens can be guaranteed and the assembly stability of the optical imaging lens can be improved.

[0051] In an exemplary embodiment, the optical imaging lens may further include a stop. The stop may be disposed between the second lens and the third lens.

[0052] In an exemplary embodiment, the spacer element group may include one or more of a first spacer element, a second spacer element, a third spacer element, a fourth spacer element, a fifth spacer element, and a sixth spacer element. Proper use of the spacer elements can effectively avoid stray light risks, reduce interference with image quality, and thus improve the imaging quality of the optical imaging lens.

[0053] In an exemplary embodiment, the lens barrel may include an object-side end face, an image-side end face, an outer annular surface, and an inner annular surface, wherein the end face of the lens barrel closest to the object side is the object-side end face of the lens barrel, and the end face of the lens barrel closest to the image side is the image-side end face of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel farthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface.

[0054] In an exemplary embodiment, the optical imaging lens satisfies: 1.74≤TD*tan(Semi-FOV) / D0m≤2.56. Wherein, TD is the distance on the optical axis from the object side of the first lens to the image side of the sixth lens, D0m is the outer diameter of the image side end face of the lens barrel, and Semi-FOV is the maximum half field angle of the optical imaging lens. By controlling the above conditional formula while ensuring that the lens achieves wide-angle characteristics, the overall length of the lens barrel can be effectively controlled, thereby avoiding the problem of the image edge becoming dark due to the overall length of the lens barrel being too long, thereby affecting the image brightness of the lens. The optical imaging lens satisfies 1.74≤TD*tan(Semi-FOV) / D0m≤2.56, which can increase the amount of light entering the lens and ensure the imaging performance and imaging brightness of the lens.

[0055] In an exemplary embodiment, the spacer element group may further include a first spacer element, wherein the first spacer element may be disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The optical imaging lens satisfies: 2.37≤D0s / d1s≤2.97, wherein D0s is the outer diameter of the object side end surface of the lens barrel, and d1s is the inner diameter of the object side surface of the first spacer element. By controlling the above conditional expression, the proportional relationship between the outer diameter of the object side end surface of the lens barrel and the inner diameter of the object side surface of the first spacer element is controlled within a certain range, which is conducive to optimizing the cooperation between the lens barrel and the first spacer element, ensuring that the lens barrel and the first spacer element can be tightly and stably connected together, thereby maintaining the overall structural stability of the optical imaging lens. At the same time, the optical imaging lens satisfies 2.37≤D0s / d1s≤2.97, which ensures the requirements of the production process of the optical imaging lens for the dispensing width, and can prevent the internal reflection stray light generated by the first lens, thereby reducing the influence of stray light on imaging.

[0056] In an exemplary embodiment, the spacer element group may further include a first spacer element, wherein the first spacer element may be disposed on the image side of the first lens and at least partially in contact with the image side surface of the first lens. The optical imaging lens satisfies: -7.38≤f1 / EP01≤-5.19, wherein f1 is the effective focal length of the first lens, and EP01 is the distance from the object side end surface of the lens barrel to the object side surface of the first spacer element along the direction parallel to the optical axis. By controlling the proportional relationship between the effective focal length of the first lens and the distance from the object side end surface of the lens barrel to the object side surface of the first spacer element along the direction parallel to the optical axis within a certain range, the ability of the first lens to collect light can be effectively and fully utilized, ensuring that the optical imaging lens achieves good wide-angle characteristics. At the same time, the optical imaging lens satisfies -7.38≤f1 / EP01≤-5.19, which can improve the assembly stability of the optical imaging lens.

[0057] In an exemplary embodiment, the spacer element group may further include a second spacer element and a third spacer element, wherein the second spacer element may be disposed on the image side of the second lens and at least partially contact the image side surface of the second lens, and the third spacer element may be disposed on the image side of the third lens and at least partially contact the image side surface of the third lens. The optical imaging lens satisfies: -0.34≤(d3s-d2m) / EP23≤1.94, wherein d3s is the inner diameter of the object side surface of the third spacer element, d2m is the inner diameter of the image side surface of the second spacer element, and EP23 is the spacing distance from the second spacer element to the third spacer element along the direction parallel to the optical axis. Through the above conditional formula, the proportional relationship between the difference between the inner diameter of the object side surface of the third spacer element and the inner diameter of the image side surface of the second spacer element and the spacing distance from the second spacer element to the third spacer element along the direction parallel to the optical axis is controlled within a certain range, which can effectively intercept stray light rays, and ensure the space required for setting the second spacer element and the third spacer element, thereby ensuring the assembly stability of the optical imaging lens.

[0058] In an exemplary embodiment, the spacer element group may further include a second spacer element and a third spacer element, wherein the second spacer element may be disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens, and the third spacer element may be disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56. Wherein, EP23 is the spacing distance from the second spacer element to the third spacer element along a direction parallel to the optical axis, CT3 is the center thickness of the third lens on the optical axis, and N3 is the refractive index of the third lens. By making the optical imaging lens satisfy 0.32≤EP23 / (CT3*N3)≤0.56, the molding processing of the third lens can be effectively guaranteed, and the assembly stability of the optical imaging lens can be further guaranteed.

[0059] In an exemplary embodiment, the spacer element group may further include a third spacer element, wherein the third spacer element may be disposed on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The optical imaging lens satisfies: -1.23≤R6 / d3s≤-0.72, wherein R6 is the radius of curvature of the image side surface of the third lens, and d3s is the inner diameter of the object side surface of the third spacer element. Through the above conditional formula, the proportional relationship between the radius of curvature of the image side surface of the third lens and the inner diameter of the object side surface of the third spacer element is controlled within a certain range, and the light passing through the third lens can be controlled to be transmitted along the desired path, thereby ensuring the transmission of light within the optical imaging lens. At the same time, the optical imaging lens satisfies -1.23≤R6 / d3s≤-0.72, and can effectively block stray light without affecting the main light.

[0060] In an exemplary embodiment, the spacer element group may further include a fourth spacer element and a fifth spacer element, wherein the fourth spacer element may be disposed on the image side of the fourth lens and at least partially contact the image side surface of the fourth lens, and the fifth spacer element may be disposed on the image side of the fifth lens and at least partially contact the image side surface of the fifth lens. The optical imaging lens satisfies: -1.97≤R9 / R10≤-1.50, 0.83≤D4m / D5s≤1.14. Wherein, R9 is the radius of curvature of the object side surface of the fifth lens, R10 is the radius of curvature of the image side surface of the fifth lens, D4m is the outer diameter of the image side surface of the fourth spacer element, and D5s is the outer diameter of the object side surface of the fifth spacer element. In the optical imaging lens, the radius of curvature on both sides of the fifth lens controls the shape of the lens. Therefore, by controlling the above conditional formula, the ratio of the outer diameter of the image side surface of the fourth spacer element to the outer diameter of the object side surface of the fifth spacer element is controlled within a reasonable range, which can reduce the processing difficulty of the fifth lens, so that the fifth lens can be better processed and formed. In addition, by controlling the ratio of the outer diameter of the image side surface of the fourth spacer element to the outer diameter of the object side surface of the fifth spacer element within a reasonable range, stray light that directly passes through the edge of the fifth lens can be effectively blocked, thereby improving the imaging quality of the optical imaging lens.

[0061] In an exemplary embodiment, the spacer element group may further include a fourth spacer element, wherein the fourth spacer element may be placed on the image side of the fourth lens and at least partially contact the image side surface of the fourth lens. The optical imaging lens satisfies: 0.84≤CT4 / (T45+CP4)≤3.04, wherein CT4 is the center thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis. Through the above conditional formula, the proportional relationship between the center thickness of the fourth lens on the optical axis and the spacing distance between the fourth lens and the fifth lens on the optical axis and the maximum thickness of the fourth spacer element along the optical axis is controlled within a certain range, avoiding the occurrence of molding problems such as welding marks during the processing and molding of the fourth lens and the fifth lens, so that the fourth lens and the fifth lens can be better processed and molded, and the influence of molding problems such as welding marks during the molding of the fourth lens and the fifth lens on the lens strength can also be avoided.

[0062] In an exemplary embodiment, the spacer element group may further include a fourth spacer element, a fifth spacer element and a sixth spacer element, wherein the fourth spacer element may be disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens, the fifth spacer element may be disposed on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens, and the sixth spacer element may be disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens. The optical imaging lens satisfies: 0.07≤(EP45+EP56) / f56≤0.27, wherein EP45 is the spacing distance from the fourth spacer element to the fifth spacer element along the direction parallel to the optical axis, EP56 is the spacing distance from the fifth spacer element to the sixth spacer element along the direction parallel to the optical axis, and f56 is the combined focal length of the fifth lens and the sixth lens. Through the above conditional formula, the proportional relationship between the spacing distance from the fourth spacer element to the sixth spacer element along the direction parallel to the optical axis and the combined focal length of the fifth lens and the sixth lens is controlled within a certain range, which can effectively balance the spatial allocation of the fifth lens and the sixth lens and improve the assembly stability of the optical imaging lens.

[0063] In an exemplary embodiment, the spacer element group may further include a fifth spacer element, wherein the fifth spacer element may be placed on the image side of the fifth lens and at least partially contact the image side surface of the fifth lens. The optical imaging lens satisfies: 1.79≤D0m / d5m≤2.29, wherein D0m is the outer diameter of the image side end surface of the lens barrel, and d5m is the inner diameter of the image side surface of the fifth spacer element. Through the above conditional formula, the proportional relationship between the outer diameter of the image side end surface of the lens barrel and the inner diameter of the image side surface of the fifth spacer element is controlled within a certain range, which can better control the maximum shape of the lens barrel and ensure the assembly stability of the optical imaging lens. In addition, the optical imaging lens satisfies 1.79≤D0m / d5m≤2.29, which is conducive to reducing stray light in the optical imaging lens.

[0064] In an exemplary embodiment, the spacer element group may further include a fifth spacer element and a fifth sub-spacer element, wherein the fifth spacer element may be disposed on the image side of the fifth lens and at least partially contact the image side surface of the fifth lens, and the fifth sub-spacer element is disposed on the image side of the fifth spacer element and at least partially contact the image side surface of the fifth spacer element. The optical imaging lens satisfies: 0.16≤∑CP5 / (CT5+T56+CT6)≤0.30, wherein ∑CP5 is the sum of the maximum thickness of the fifth spacer element and the fifth sub-spacer element along the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. By controlling the above conditional expression, it is beneficial to process and shape the fifth lens and the sixth lens, and it is ensured that when the spacing between the fifth lens and the sixth lens is too large, the fifth lens and the sixth lens can still be connected together through the fifth spacer element and the fifth sub-spacer element, while ensuring the assembly stability of the fifth lens and the sixth lens.

[0065] In an exemplary embodiment, the optical imaging lens satisfies: 0.87≤(L-∑EP) / ∑AT≤1.49. Wherein, L is the maximum height of the lens barrel along the optical axis, ∑EP is the sum of the spacing distances between any two adjacent spacing elements in the spacing element group along the direction parallel to the optical axis, and ∑AT is the sum of the spacing distances between any two adjacent lenses in the imaging lens group on the optical axis. By controlling the ratio of (L-∑EP) to ∑AT within a certain range through the above conditional formula, the reasonable distribution of the positions of the spacing elements and the lenses in the lens barrel is ensured, and the assembly stability of the optical imaging lens is ensured.

[0066] In an exemplary embodiment, the optical imaging lens satisfies: 5.67≤L / (CT1+T12)≤6.04, where L is the maximum height of the lens barrel along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and T12 is the spacing distance between the first lens and the second lens on the optical axis. By controlling the above conditional expression, the ratio of the maximum height of the lens barrel to the sum of the center thickness of the first lens on the optical axis and the spacing distance between the first lens and the second lens on the optical axis is controlled within a certain range, which can avoid the influence of the thick center thickness of the first lens on the optical axis on the molding of the optical imaging lens.

[0067] The optical imaging lens according to the above embodiment of the present application may use six lenses. By reasonably allocating the parameters of each lens, it can be ensured that the optical imaging lens has a wide-angle feature.

[0068] It should be understood that the present application focuses on optimizing the performance of a six-piece wide-angle lens. Specifically, the present application focuses on how to overcome problems such as the large misalignment that is likely to occur on the assembly bearing surface caused by the excessive contact area between the fifth spacer and the fifth and sixth lenses due to the realization of the wide-angle characteristic, or the problem that the overall length of the lens barrel is likely to be too long and cause the imaging edge to become dark when the wide angle is satisfied, or problems such as assembly stability. The specific optical power distribution of the six lenses and the surface shape settings of each lens are not the key concerns of the present application, and these settings can be adjusted accordingly as needed. That is to say, although several specific optical power distributions and surface shape settings are shown for the imaging lens group in the embodiments of the present application, it should be understood that these embodiments are merely exemplary, and the imaging lens group in the present application should not be limited to the several specific situations shown in the embodiments, but should be widely understood as a six-piece imaging lens group with a large field of view angle and controlling the curvature radii of the object side surface of the fifth lens and the image side surface of the sixth lens, that is, a six-piece imaging lens group that satisfies 68.00° < Semi-FOV ≤ 74.24° and 0.76 ≤ (R12 + R9) / (R12 - R9) ≤ 2.46.

[0069] In an embodiment of the present application, at least one of the surfaces of each of the first lens to the sixth lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Optionally, both the object side surface and the image side surface of each of the first lens to the sixth lens are aspherical surfaces.

[0070] A second aspect of the present application provides such an optical imaging lens. The optical imaging lens may include an imaging lens group, a spacer element group, and a lens barrel, wherein the imaging lens group and the spacer element group are disposed in the lens barrel. The imaging lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence along the optical axis from the object side to the image side. The optical imaging lens satisfies: 68.00° < Semi-FOV ≤ 74.24° and 0.76 ≤ (R12 + R9) / (R12 - R9) ≤ 2.46. The optical imaging lens according to the present application has a large field of view angle. By adjusting the curvature radius of the object side surface of the fifth lens and the curvature radius of the image side surface of the sixth lens, the light can pass through the fifth lens and the sixth lens smoothly, ensuring that the lens realizes good wide-angle characteristics.

[0071] In one embodiment, the spacer element group may include a fifth spacer element and a fifth sub-spacer element, wherein the fifth spacer element may be disposed on the image side of the fifth lens and at least partially contact the image side surface of the fifth lens, and the fifth sub-spacer element is disposed on the image side of the fifth spacer element and at least partially contact the image side surface of the fifth spacer element. The optical imaging lens satisfies: 0.16≤∑CP5 / (CT5+T56+CT6)≤0.30, wherein ∑CP5 is the sum of the maximum thickness of the fifth spacer element and the fifth sub-spacer element along the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis. By controlling the above conditional expression, it is beneficial to process and shape the fifth lens and the sixth lens, and it is ensured that when the spacing between the fifth lens and the sixth lens is too large, the fifth lens and the sixth lens can still be connected together through the fifth spacer element and the fifth sub-spacer element, while ensuring the assembly stability of the fifth lens and the sixth lens.

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

[0073] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0074] Example 1

[0075] The following reference Figure 2 An optical imaging lens according to Embodiment 1 of the present application is described.

[0076] like Figure 2 As shown, the optical imaging lens may include a lens barrel, an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3.

[0077] The first lens E1 has negative optical power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative optical power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive optical power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative optical power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is concave, and its image side surface S12 is concave. In the example, the image side of the sixth lens E6 may also be provided with an optical element, and the optical element may be, for example, a filter, and the optical element has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15 (not shown).

[0078] The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 and a second sub-spacer element P2b disposed between the second lens and the third lens, a third spacer element P3 and a third sub-spacer element P3b disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, and a fifth spacer element P5 and a fifth sub-spacer element P5b disposed between the fifth lens and the sixth lens. The spacer elements may block excess light in the imaging process from entering the next lens, while allowing the lens and the lens barrel to better support each other, thereby enhancing the structural stability of the optical imaging lens.

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

[0080] Table 1

[0081]

[0082] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape of each aspherical surface can be defined by but not limited to the following aspherical surface formula:

[0083]

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

[0085] Table 2

[0086]

[0087] Example 2

[0088] The following reference Figure 3 An optical imaging lens according to Embodiment 2 of the present application is described.

[0089] like Figure 3 As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter. The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 disposed between the fifth lens and the sixth lens, and a fifth sub-spacer element P5b.

[0090] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 1, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structure dimensions of at least part of the elements in the lens barrel and the spacer element group are different, and the number of spacer elements included in the spacer element group is different.

[0091] Example 3

[0092] The following reference Figure 4 An optical imaging lens according to Embodiment 3 of the present application is described.

[0093] like Figure 4As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter, and the optical element has an object side surface S13 (not shown) and an image side surface S14 (not shown). Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on an imaging surface S15 (not shown). The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 disposed between the fifth lens and the sixth lens, and a fifth sub-spacer element P5b.

[0094] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 1, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The difference between this embodiment and Embodiment 1 is that the structure dimensions of at least part of the elements in the lens barrel and the spacer element group are different, and the number of spacer elements included in the spacer element group is different.

[0095] Figure 5 The magnification chromatic aberration curve of the optical imaging lens of Example 1, 2 or 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 6 The axial chromatic aberration curve of the optical imaging lens of Example 1, 2 or 3 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical imaging lens. Figure 7 The astigmatism curve of the optical imaging lens of Example 1, 2 or 3 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Figure 8 The distortion curve of the optical imaging lens of Example 1, 2 or 3 is shown, which indicates the distortion magnitude value corresponding to different image heights. Figure 5 , Figure 6 , Figure 7 and Figure 8 It can be seen that the optical imaging lens of Example 1, 2 or 3 can achieve good imaging quality.

[0096] Example 4

[0097] The following reference Fig. 9 An optical imaging lens according to Embodiment 4 of the present application is described.

[0098] like Fig. 9 As shown, the optical imaging lens may include a lens barrel, an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3.

[0099] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative power, and its object side surface S11 is concave, and its image side surface S12 is concave. In the example, the image side of the sixth lens E6 may also be provided with an optical element, and the optical element may be, for example, a filter, and the optical element has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15 (not shown).

[0100] The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 disposed between the second lens and the third lens, a third spacer element P3 and a third sub-spacer element P3b disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, and a fifth spacer element P5 disposed between the fifth lens and the sixth lens. The spacer elements can block excess light in the imaging process from entering the next lens, while allowing the lens and the lens barrel to better support each other, thereby enhancing the structural stability of the optical imaging lens.

[0101] Table 3 shows the basic parameters of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness / distance, and effective radius are all millimeters (mm).

[0102] Table 3

[0103]

[0104] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 4 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical surface S1-S12 in Example 4.

[0105] Table 4

[0106]

[0107]

[0108] Example 5

[0109] The following reference Fig.10 An optical imaging lens according to Embodiment 5 of the present application is described.

[0110] like Fig.10 As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter. The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 disposed between the second lens and the third lens, a third spacer element P3 and a third sub-spacer element P3b disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 disposed between the fifth lens and the sixth lens, and a sixth spacer element P6 disposed on the image side of the sixth lens.

[0111] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 4, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structure dimensions of at least part of the elements in the lens barrel and the spacer element group are different, and the number of spacer elements included in the spacer element group is different.

[0112] Example 6

[0113] The following reference Fig.11 An optical imaging lens according to Example 6 of the present application is described.

[0114] like Fig.11As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter. The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 disposed between the fifth lens and the sixth lens, and a sixth spacer element P6 disposed on the image side of the sixth lens.

[0115] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 4, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some elements in the lens barrel and the spacer element group are different.

[0116] Fig.12 The magnification chromatic aberration curve of the optical imaging lens of Example 4, 5 or 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Fig.13 The axial chromatic aberration curve of the optical imaging lens of Example 4, 5 or 6 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.14 The astigmatism curve of the optical imaging lens of Example 4, 5 or 6 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Fig.15 The distortion curves of the optical imaging lenses of Embodiments 4, 5 or 6 are shown, which represent the distortion magnitude values ​​corresponding to different image heights. Fig.12 , Fig.13 , Fig.14 and Fig.15 It can be seen that the optical imaging lens of Example 4, 5 or 6 can achieve good imaging quality.

[0117] Example 7

[0118] The following reference Fig.16 An optical imaging lens according to Embodiment 7 of the present application is described.

[0119] like Fig.16As shown, the optical imaging lens may include a lens barrel, an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in order from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3.

[0120] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has negative power, and its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative power, and its object side surface S11 is concave, and its image side surface S12 is convex. In the example, the image side of the sixth lens E6 may also be provided with an optical element, and the optical element may be, for example, a filter, and the optical element has an object side surface S13 (not shown) and an image side surface S14 (not shown). The light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15 (not shown).

[0121] The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 and a second sub-spacer element P2b disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 and a fifth sub-spacer element P5b disposed between the fifth lens and the sixth lens. The spacer elements may block excess light in the imaging process from entering the next lens, while allowing the lens and the lens barrel to better support each other, thereby enhancing the structural stability of the optical imaging lens.

[0122] Table 5 shows the basic parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance, and effective radius are all millimeters (mm).

[0123] Table 5

[0124]

[0125] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are aspherical surfaces. Table 6 shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical surface S1-S12 in Example 7.

[0126] Table 6

[0127]

[0128]

[0129] Example 8

[0130] The following reference Fig.17 An optical imaging lens according to Example 8 of the present application is described.

[0131] like Fig.17 As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter. The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 and a second sub-spacer element P2b disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 and a fifth sub-spacer element P5b disposed between the fifth lens and the sixth lens.

[0132] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 7, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some elements in the lens barrel and the spacer element group are different.

[0133] Example 9

[0134] The following reference Fig.18 An optical imaging lens according to Example 9 of the present application is described.

[0135] like Fig.18As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed in the lens barrel. The imaging lens group may include a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6 in sequence from the object side to the image side along the optical axis. A stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element may also be disposed on the image side of the sixth lens E6, and the optical element may be, for example, a filter. The spacer element group may include a first spacer element P1 disposed between the first lens and the second lens, a second spacer element P2 and a second sub-spacer element P2b disposed between the second lens and the third lens, a third spacer element P3 disposed between the third lens and the fourth lens, a fourth spacer element P4 disposed between the fourth lens and the fifth lens, a fifth spacer element P5 and a fifth sub-spacer element P5b disposed between the fifth lens and the sixth lens.

[0136] The structure of the imaging lens group of this embodiment is the same as that of the imaging lens group of Embodiment 7, that is, the basic parameter table of the optical imaging lens of this embodiment is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some elements in the lens barrel and the spacer element group are different.

[0137] Fig.19 The magnification chromatic aberration curve of the optical imaging lens of Example 7, 8 or 9 is shown, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. Fig. 20 The axial chromatic aberration curve of the optical imaging lens of Example 7, 8 or 9 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Fig.21 The astigmatism curve of the optical imaging lens of Example 7, 8 or 9 is shown, which represents the meridional image curvature and sagittal image curvature corresponding to different image heights. Fig. 22 The distortion curves of the optical imaging lenses of Examples 7, 8 or 9 are shown, which represent the distortion values ​​corresponding to different image heights. Fig.19 , Fig. 20 , Fig.21 and Fig. 22 It can be seen that the optical imaging lens of Example 7, 8 or 9 can achieve good imaging quality.

[0138] Table 7 shows the values ​​of parameters such as Semi-FOV, f, f1, f2, f3, f4, f5, f6 and f56 of each of Examples 1 to 9.

[0139] Table 7

[0140] Basic data / Example 1-3 4-6 7-9 Semi-FOV(°) 68.04 74.24 71.44 f(mm) 2.32 2.32 2.30 f1(mm) -4.14 -4.27 -3.91 f2(mm) -72.24 38.52 -255.52 f3(mm) 2.42 2.47 2.51 f4(mm) -5.86 -4.64 -4.76 f5(mm) 2.46 2.35 2.34 f6(mm) -2.36 -2.34 -3.11 f56(mm) 4.65 4.22 3.32

[0141] Table 8 shows the values ​​of parameters such as d1s, d2m, d3s, D4m, d5s, d5m, D5s, D0s, D0m, EP01, EP23, EP45, EP56, CP4, CP5, L, ∑AT, ∑EP and ∑CP5 in each of Examples 1 to 9. The above parameters d1s, d2m, d3s, D4m, d5s, d5m, D5s, D0s, D0m, EP01, EP23, EP45, CP4, CP5, L can be calculated according to Figure 1 The units of the parameters listed in Table 8 are all mm.

[0142] Table 8

[0143]

[0144] Table 9 shows the values ​​of the conditional expressions of each of Examples 1 to 9.

[0145] Table 9

[0146] Conditional / Example 1 2 3 4 5 6 7 8 9 Semi-FOV 68.04 68.04 68.04 74.24 74.24 74.24 71.44 71.44 71.44 (R12+R9) / (R12-R9) 1.66 1.66 1.66 2.46 2.46 2.46 0.76 0.76 0.76 (D5s-d5s) / CP5 2.27 2.06 1.23 2.73 2.34 2.34 2.01 0.94 1.21 R9 / R10 -1.58 -1.58 -1.58 -1.50 -1.50 -1.50 -1.97 -1.97 -1.97 D4m / D5s 1.03 1.03 1.09 0.96 0.83 0.83 1.09 1.14 1.11 (L-∑EP) / ∑AT 1.31 1.22 1.19 1.49 0.87 0.97 1.14 1.22 1.19 (D0s / d1s) 2.59 2.62 2.62 2.97 2.81 2.81 2.62 2.38 2.37 (d3s-d2m) / EP23 -0.02 1.94 1.75 1.02 1.75 -0.09 -0.16 -0.34 -0.14 (EP45+EP56) / f56 0.08 0.08 0.08 0.07 0.27 0.27 0.11 0.11 0.11 CT4 / (T45+CP4) 1.40 1.40 1.40 0.84 2.04 2.23 3.04 3.04 3.04 f1 / EP01 -6.37 -7.26 -7.26 -6.09 -7.38 -7.38 -5.19 -5.70 -5.19 EP23 / (CT3*N3) 0.39 0.56 0.38 0.32 0.40 0.37 0.50 0.41 0.50 L / (CT1+T12) 5.76 5.67 5.67 5.72 5.67 5.67 5.92 5.75 6.04 ∑CP5 / (CT5+T56+CT6) 0.17 0.17 0.24 0.22 0.22 0.22 0.16 0.30 0.30 D0m / d5m 1.82 2.11 2.18 2.15 2.23 2.29 1.79 1.89 2.05 TD*tan(Semi-FOV) / D0m 1.92 1.74 1.74 2.56 2.47 2.40 2.55 2.20 2.02 R6 / d3s -0.89 -0.72 -0.88 -0.89 -0.83 -0.78 -1.20 -1.23 -1.19

[0147] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0148] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: include: An imaging lens group, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis; a spacer element group, comprising a fifth spacer element, wherein the fifth spacer element is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens; as well as a lens barrel, in which the imaging lens group and the spacer element group are arranged; Wherein, the number of lenses having optical power of the optical imaging lens is six; The optical imaging lens meets the following requirements: 68.00° <Semi-FOV≤74.24°,0.76≤(R12+R9) / (R12-R9)≤2.46,0.94≤(D5s-d5s) / CP5≤2.73; Among them, Semi-FOV is the maximum half field of view angle of the optical imaging lens, R9 is the curvature radius of the object side of the fifth lens, R12 is the curvature radius of the image side of the sixth lens, D5s is the outer diameter of the object side of the fifth spacer element, d5s is the inner diameter of the object side of the fifth spacer element, and CP5 is the maximum thickness of the fifth spacer element along the optical axis.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 1.74≤TD*tan(Semi-FOV) / D0m≤2.56; Wherein, TD is the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis, and D0m is the outer diameter of the image side end surface of the lens barrel.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies: 1.79≤D0m / d5m≤2.29; Wherein, D0m is the outer diameter of the image side end surface of the lens barrel, and d5m is the inner diameter of the image side surface of the fifth spacing element.

4. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a fifth sub-spacer element, the fifth sub-spacer element being disposed on the image side of the fifth spacer element and at least partially in contact with the image side surface of the fifth spacer element; Wherein, the optical imaging lens satisfies: 0.16≤∑CP5 / (CT5+T56+CT6)≤0.30; ∑CP5 is the sum of the maximum thicknesses of the fifth spacer element and the fifth sub-spacer element along the optical axis, CT5 is the center thickness of the fifth lens on the optical axis, T56 is the spacing distance between the fifth lens and the sixth lens on the optical axis, and CT6 is the center thickness of the sixth lens on the optical axis.

5. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a fourth spacer element, the fourth spacer element is disposed on the image side of the fourth lens and is in at least partial contact with the image side surface of the fourth lens; Wherein, the optical imaging lens satisfies: -1.97≤R9 / R10≤-1.50, 0.83≤D4m / D5s≤1.14; 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, D4m is the outer diameter of the image side surface of the fourth spacing element, and D5s is the outer diameter of the object side surface of the fifth spacing element.

6. The optical imaging lens according to claim 5, characterized in that: The optical imaging lens meets the following requirements: 0.84≤CT4 / (T45+CP4)≤3.04; Wherein, CT4 is the center thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, and CP4 is the maximum thickness of the fourth spacing element along the optical axis.

7. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a first spacer element, the first spacer element is disposed on the image side of the first lens and is in at least partial contact with the image side surface of the first lens; Wherein, the optical imaging lens satisfies: 2.37≤D0s / d1s≤2.97; Wherein, D0s is the outer diameter of the object side end surface of the lens barrel, and d1s is the inner diameter of the object side surface of the first spacing element.

8. The optical imaging lens according to claim 7, wherein: The optical imaging lens satisfies: -7.38≤f1 / EP01≤-5.19; Wherein, f1 is the effective focal length of the first lens, and EP01 is the distance from the object side end surface of the lens barrel to the object side surface of the first spacing element along the direction parallel to the optical axis.

9. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a third spacer element, the third spacer element is disposed on the image side of the third lens and is in at least partial contact with the image side surface of the third lens; Wherein, the optical imaging lens satisfies: -1.23≤R6 / d3s≤-0.72; Wherein, R6 is the curvature radius of the image side surface of the third lens, and d3s is the inner diameter of the object side surface of the third spacing element.

10. The optical imaging lens according to claim 9, characterized in that: The spacer element group further includes a second spacer element, the second spacer element is disposed on the image side of the second lens and is in at least partial contact with the image side surface of the second lens; Wherein, the optical imaging lens satisfies: -0.34≤(d3s-d2m) / EP23≤1.94; Among them, d3s is the inner diameter of the object side of the third spacing element, d2m is the inner diameter of the image side of the second spacing element, and EP23 is the spacing distance from the second spacing element to the third spacing element along the direction parallel to the optical axis.

11. The optical imaging lens according to claim 10, wherein: The optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56; Wherein, EP23 is the spacing distance from the second spacing element to the third spacing element along the direction parallel to the optical axis, CT3 is the center thickness of the third lens on the optical axis, and N3 is the refractive index of the third lens.

12. The optical imaging lens according to claim 1, wherein: The spacer element group further includes a fourth spacer element and a sixth spacer element; The fourth spacer element is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens; The sixth spacer element is disposed on the image side of the sixth lens and is in at least partial contact with the image side surface of the sixth lens; Wherein, the optical imaging lens satisfies: 0.07≤(EP45+EP56) / f56≤0.27; Among them, EP45 is the spacing distance from the fourth spacing element to the fifth spacing element along the direction parallel to the optical axis, EP56 is the spacing distance from the fifth spacing element to the sixth spacing element along the direction parallel to the optical axis, and f56 is the combined focal length of the fifth lens and the sixth lens.

13. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The optical imaging lens satisfies: 0.87≤(L-∑EP) / ∑AT≤1.49; Wherein, L is the maximum height of the lens barrel along the optical axis, ∑EP is the sum of the spacing distances between any two adjacent spacing elements in the spacing element group along the direction parallel to the optical axis, and ∑AT is the sum of the spacing distances between any two adjacent lenses in the imaging lens group on the optical axis.

14. The optical imaging lens according to any one of claims 1 to 12, characterized in that: The optical imaging lens satisfies: 5.67≤L / (CT1+T12)≤6.04; Wherein, L is the maximum height of the lens barrel along the optical axis, CT1 is the center thickness of the first lens on the optical axis, and T12 is the spacing distance between the first lens and the second lens on the optical axis.

Images