Optical imaging lens

Abstract

The utility model 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

[0006] ,

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

[0002] In recent years, with the increasing changes in consumer demands, the requirements for optical imaging lenses have gradually become more complex and diverse. In different application scenarios, the performance of optical imaging lenses varies. 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, when adjusting the object side surface of the fifth lens and the image side surface of the sixth lens to an extent that allows light to smoothly transition to the rear, it will cause the contact area between the fifth spacer between the fifth lens and the sixth lens and the fifth lens and the sixth lens to be too large, resulting in a large misalignment easily occurring on the assembly bearing surface.

[0004] 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 marginal light to enter the rear optical system, thereby affecting the sensitivity of the lens. Summary of the Utility Model

[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. Here, 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 this application, 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 surface of the first lens to the image-side surface 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-of-view angle of the optical imaging lens.

[0007] According to an exemplary embodiment of this application, the optical imaging lens satisfies: 1.79 ≤ D0m / d5m ≤ 2.29. Wherein, D0m is the outer diameter of the image-side end face 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 this 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 contacts the image side side 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 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.

[0009] According to an exemplary embodiment of this 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 contacts the image side 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 of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens, D4m is the outer diameter of the image side of the fourth spacer element, and D5s is the outer diameter of the object side of the fifth spacer element.

[0010] According to an exemplary embodiment of this 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 between the fourth and fifth lenses on the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis.

[0011] According to an exemplary embodiment of this application, the spacer element group further includes a first spacer element 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 face 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 this 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 face of the lens barrel to the object-side surface of the first spacer element along a direction parallel to the optical axis.

[0013] According to an exemplary embodiment of this 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 contacts 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.

[0014] According to an exemplary embodiment of this application, the spacer element group further includes a second spacer element 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 between the second and third spacer elements along a direction parallel to the optical axis.

[0015] According to an exemplary embodiment of this application, the optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56. Wherein, EP23 is the spacing distance between the second and third spacers 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 this application, 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 of the fourth lens. The sixth spacer element is disposed on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. The optical imaging lens satisfies: 0.07 ≤ (EP45 + EP56) / f56 ≤ 0.27. Wherein, EP45 is the spacing distance between the fourth and fifth spacer elements along a direction parallel to the optical axis, EP56 is the spacing distance between the fifth and sixth spacer elements along a direction parallel to the optical axis, and f56 is the combined focal length of the fifth and sixth lenses.

[0017] According to an exemplary embodiment of this 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 spacers in the spacer 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 along the optical axis.

[0018] According to an exemplary embodiment of this 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 distance between the first lens and the second lens on the optical axis.

[0019] The optical imaging lens provided in this application employs six lenses. By limiting the maximum half-field of view within a certain range, the optical imaging lens achieves a large field of view. Furthermore, by adjusting the curvature radius of the object-side surface of the fifth lens and the image-side surface of the sixth lens, light can pass smoothly through the fifth and sixth lenses, ensuring good wide-angle characteristics. While maintaining wide-angle characteristics, the fifth spacer element is rationally designed, controlling the ratio of its inner and outer diameter difference to its maximum thickness along the optical axis within a certain range. This avoids excessive contact area between the fifth spacer element and the fifth and sixth lenses, which could lead to significant misalignment during assembly, and also prevents excessively large inner diameter of the fifth spacer element from affecting lens sensitivity. The optical imaging lens satisfying 0.94≤(D5s-d5s) / CP5≤2.73 ensures assembly sensitivity and improves assembly stability. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Wherein:

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

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

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

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

[0025] Figure 5 , Figure 6 , Figure 7 , Figure 8 The magnification chromatic aberration curve, on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 1, 2, or 3 of this application are shown respectively.

[0026] Figure 9 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0027] Figure 10 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0028] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0029] Figure 12 , Figure 13 , Figure 14 , Figure 15 The magnification chromatic aberration curve, on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 4, 5, or 6 of this application are shown respectively.

[0030] Figure 16 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0031] Figure 17 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0032] Figure 18 A schematic diagram of the structure of an optical imaging lens according to Embodiment 9 of this application is shown;

[0033] Figure 19 , Figure 20 , Figure 21 , Figure 22 The magnification chromatic aberration curve, on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lens according to Embodiments 7, 8, or 9 of this application are shown respectively.

[0034] Figure 23 The defocus curves of the optical imaging lens are shown when Semi-FOV = 71°, (R12+R9) / (R12-R9) = 1.5 and (D5s-d5s) / CP5 = 1.78.

[0035] Figure 24 The defocus curves of the optical imaging lens are shown when Semi-FOV = 71°, (R12+R9) / (R12-R9) = 1.5 and (D5s-d5s) / CP5 = 2.51.

[0036] Figure 25 The defocus curves of the optical imaging lens are shown when Semi-FOV = 71°, (R12+R9) / (R12-R9) = 1.5 and (D5s-d5s) / CP5 = 0.75.

[0037] Figure 26 The defocus curves are shown when the optical imaging lens satisfies Semi-FOV = 71°, (R12+R9) / (R12-R9) = 1.5 and (D5s-d5s) / CP5 = 3.02. Detailed Implementation

[0038] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

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

[0040] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0041] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the image plane is called the image-side surface of the lens.

[0042] The optical imaging lens of the exemplary embodiments of this application can be simulated using software and / or tools such as ZEMAX and CODEV. Optionally, the optical imaging lens can be simulated using CODEV software. During the simulation process using software and / or tools as described above, the surface profile of each lens can be appropriately adjusted according to the built-in surface profile model of the software and / or tool used.

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

[0044] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] For six-element wide-angle lenses, it's typically necessary to properly allocate the surface shapes of the last two lenses to ensure a smooth transition of light to the sensor at the rear of the lens. In other words, for a six-element wide-angle lens, the curvature radii of the fifth and sixth lenses are usually adjusted to allow light to pass smoothly through them, thus ensuring good wide-angle performance. However, adjusting the object-side surface of the fifth lens and the image-side surface of the sixth lens to allow for a smooth transition of light to the rear while maintaining wide-angle performance can result in an excessively large contact area between the fifth spacer and the fifth and sixth lenses, making it prone to significant misalignment of the assembly surfaces. Furthermore, simply increasing the inner diameter of the fifth spacer to reduce the contact area between the fifth spacer and the fifth and sixth lenses can cause sharp edge light rays to enter the rear optical system, thus affecting the lens's sensitivity.

[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 realizes 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 at least partially contacts 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 proportional relationship between the difference in the inner and outer diameters of the fifth spacer element and 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 of 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] Figure 23 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 1.78 is shown. Figure 24 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 2.51 is shown. Figure 25 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 0.75 is shown. Figure 26 The defocus curve when the optical imaging lens satisfies (D5s - d5s) / CP5 = 3.02 is shown.

[0050] Combined with Figure 23 、 Figure 24 、 Figure 25 and Figure 26It can be seen that the defocus curve performs well when the optical imaging lens satisfies (D5s-d5s) / CP5 = 1.78, and also when it satisfies (D5s-d5s) / CP5 = 2.51. However, when the optical imaging lens satisfies (D5s-d5s) / CP5 = 0.75, the lens stability decreases, leading to increased defocusing in the outer field of view. When the optical imaging lens satisfies (D5s-d5s) / CP5 = 3.02, the light refraction is steep, and the peak value of the outer field of view 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 an aperture stop. The aperture 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 spacer elements can effectively mitigate 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 ring surface, and an inner ring surface, wherein the end face of the lens barrel closest to the object side is the object-side end face of the lens barrel, and the end face of the lens barrel closest to the image side is the image-side end face of the lens barrel; in a direction perpendicular to the optical axis, the surface of the lens barrel furthest from the optical axis is the outer ring surface, and the surface of the lens barrel closest to the optical axis is the inner ring surface.

[0054] In an exemplary embodiment, the optical imaging lens satisfies: 1.74 ≤ TD * tan(Semi-FOV) / D0m ≤ 2.56. Here, TD is the distance along the optical axis from the object-side surface of the first lens to the image-side surface 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-of-view angle of the optical imaging lens. By controlling the above conditional expression while ensuring the lens achieves wide-angle characteristics, the overall length of the lens barrel can be effectively controlled, thus avoiding the problem of excessively long lens barrels causing darkening of the image edges and affecting the brightness of the image. The optical imaging lens satisfying 1.74 ≤ TD * tan(Semi-FOV) / D0m ≤ 2.56 can improve the amount of light entering the lens, ensuring lens imaging performance and image brightness.

[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, where D0s is the outer diameter of the object-side end face of the lens barrel and d1s is the inner diameter of the object-side end face of the first spacer element. By controlling the above conditional expression, the proportional relationship between the outer diameter of the object-side end face of the lens barrel and the inner diameter of the object-side end face of the first spacer element is controlled within a certain range, which is beneficial to optimizing the fit 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, ensuring the requirements of the dispensing width in the manufacturing process of the optical imaging lens, and preventing internal reflection stray light generated by the first lens, thereby reducing the impact 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, where f1 is the effective focal length of the first lens, and EP01 is the distance from the object-side end face of the lens barrel to the object-side surface of the first spacer element along a direction parallel to the optical axis. By controlling the ratio between the effective focal length of the first lens and the distance from the object-side end face of the lens barrel to the object-side surface of the first spacer element along a direction parallel to the optical axis within a certain range, the light-collecting ability of the first lens can be effectively and fully utilized, ensuring that the optical imaging lens achieves good wide-angle characteristics. Simultaneously, satisfying -7.38 ≤ f1 / EP01 ≤ -5.19 improves 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. 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 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 of the third lens. The optical imaging lens satisfies: -0.34≤(d3s-d2m) / EP23≤1.94, where d3s is the inner diameter of the object side of the third spacer element, d2m is the inner diameter of the image side of the second spacer element, and EP23 is the spacing distance between the second and third spacer elements along the direction parallel to the optical axis. By controlling the ratio of the difference between the inner diameter of the object side of the third spacer element and the inner diameter of the image side of the second spacer element to the spacing distance between the second and third spacer elements along the direction parallel to the optical axis within a certain range through the above conditional expression, stray light rays can be effectively intercepted, and the space required for setting the second and third spacer elements can be guaranteed, 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. 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 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 of the third lens. The optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56. Wherein, EP23 is the spacing distance between the second and third spacer elements 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. By ensuring that the optical imaging lens satisfies 0.32≤EP23 / (CT3*N3)≤0.56, the forming and 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 of the third lens. The optical imaging lens satisfies: -1.23≤R6 / d3s≤-0.72, where R6 is the radius of curvature of the image side of the third lens and d3s is the inner diameter of the object side of the third spacer element. By controlling the ratio of the radius of curvature of the image side of the third lens to the inner diameter of the object side of the third spacer element within a certain range through the above condition, the light passing through the third lens can be controlled to transmit along the required 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, which can effectively block stray light without affecting the main ray.

[0060] In an exemplary embodiment, the spacer element group may further include a fourth spacer element and a fifth spacer element. 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 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 of the fifth lens. The optical imaging lens satisfies: -1.97≤R9 / R10≤-1.50, 0.83≤D4m / D5s≤1.14. Here, R9 is the radius of curvature of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens, D4m is the outer diameter of the image side of the fourth spacer element, and D5s is the outer diameter of the object side of the fifth spacer element. In the optical imaging lens, the radii of curvature on both sides of the fifth lens control the shape of the lens. Therefore, by controlling the above conditions, the ratio of the outer diameter of the image side of the fourth spacer element to the outer diameter of the object side of the fifth spacer element is controlled within a reasonable range, which can reduce the processing difficulty of the fifth lens and thus allow for better processing and shaping of the fifth lens. In addition, by controlling the ratio of the outer diameter of the image side of the fourth spacer element to the outer diameter of the object side of the fifth spacer element within a reasonable range, stray light that passes directly 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 in contact with the image side of the fourth lens. The optical imaging lens satisfies: 0.84 ≤ CT4 / (T45+CP4) ≤ 3.04, where CT4 is the center thickness of the fourth lens on the optical axis, T45 is the spacing distance between the fourth and fifth lenses on the optical axis, and CP4 is the maximum thickness of the fourth spacer element along the optical axis. Through the above conditional expression, the proportional relationship between the center thickness of the fourth lens on the optical axis, the spacing distance between the fourth and fifth lenses on the optical axis, and the maximum thickness of the fourth spacer element along the optical axis is controlled within a certain range. This avoids forming problems such as weld lines during the processing of the fourth and fifth lenses, thereby allowing for better processing of the fourth and fifth lenses and preventing the influence of forming problems such as weld lines on the lens strength.

[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. 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 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 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 of the sixth lens. The optical imaging lens satisfies: 0.07 ≤ (EP45 + EP56) / f56 ≤ 0.27, where EP45 is the spacing distance between the fourth and fifth spacer elements along the direction parallel to the optical axis, EP56 is the spacing distance between the fifth and sixth spacer elements along the direction parallel to the optical axis, and f56 is the combined focal length of the fifth and sixth lenses. By controlling the ratio of the spacing distance between the fourth and sixth spacer elements along the direction parallel to the optical axis to the combined focal length of the fifth and sixth lenses within a certain range using the above conditional expression, the spatial allocation of the fifth and sixth lenses can be effectively balanced, improving 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 is positioned on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. The optical imaging lens satisfies: 1.79 ≤ D0m / d5m ≤ 2.29, where D0m is the outer diameter of the image side end face of the lens barrel, and d5m is the inner diameter of the image side surface of the fifth spacer element. By controlling the ratio of the outer diameter of the image side end face of the lens barrel to the inner diameter of the image side surface of the fifth spacer element within a certain range using the above condition, the maximum shape of the lens barrel can be better controlled, ensuring the assembly stability of the optical imaging lens. Furthermore, satisfying 1.79 ≤ D0m / d5m ≤ 2.29 helps reduce stray light within 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. The fifth spacer element is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens. The fifth sub-spacer element is positioned on the image side of the fifth spacer element and at least partially contacts the image side of the fifth spacer element. This optical imaging lens satisfies: 0.16 ≤ ∑CP5 / (CT5+T56+CT6) ≤ 0.30, where ∑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 and sixth lenses 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 and sixth lenses, and ensures that even if the spacing between the fifth and sixth lenses is too large, the fifth and sixth lenses can still be connected together through the fifth spacer element and the fifth sub-spacer element, while also ensuring the assembly stability of the fifth and sixth lenses.

[0065] In an exemplary embodiment, the optical imaging lens satisfies: 0.87 ≤ (L - ∑EP) / ∑AT ≤ 1.49. Where 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 spacers in the spacer 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 along the optical axis. By controlling the ratio of (L - ∑EP) to ∑AT within a certain range using the above conditional expression, the reasonable allocation of the spacers and lenses within the lens barrel is ensured, guaranteeing the assembly stability of the optical imaging lens.

[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 distance between the first and second lenses 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 distance between the first and second lenses on the optical axis is controlled within a certain range, thus avoiding the influence of an excessively thick center thickness of the first lens on the optical axis on the shaping of the optical imaging lens.

[0067] The optical imaging lens according to the above embodiments of this application can employ six lenses. By rationally allocating the parameters of each lens, a wide-angle characteristic of the optical imaging lens can be ensured.

[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 problems such as the overall length of the lens barrel being too long and causing darkening of the imaging edge 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 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 satisfying 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 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 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. The fifth spacer element is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens. The fifth sub-spacer element is positioned on the image side of the fifth spacer element and at least partially contacts the image side of the fifth spacer element. This optical imaging lens satisfies: 0.16 ≤ ∑CP5 / (CT5+T56+CT6) ≤ 0.30, where ∑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 between the fifth and sixth lenses 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 and sixth lenses, and ensures that even if the spacing between the fifth and sixth lenses is too large, the fifth and sixth lenses can still be connected together through the fifth spacer element and the fifth sub-spacer element, while also ensuring the assembly stability of the fifth and sixth lenses.

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

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

[0074] Example 1

[0075] The following is for reference Figure 2 Describes an optical imaging lens according to Embodiment 1 of this application.

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

[0077] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. In this example, the image-side of the sixth lens E6 may also be provided with an optical element, such as a filter, having an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged onto 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 can block excess light from entering the next lens during the imaging process, while also allowing for better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

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

[0080] Table 1

[0081]

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

[0083]

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

[0085] Table 2

[0086] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 8.7016E-02 -8.0773E-02 3.4193E-02 8.2775E-03 -2.1687E-02 1.4913E-02 -5.8290E-03 1.3941E-03 -1.5951E-04 S2 1.7816E-01 -8.8591E-02 1.5953E-01 2.2052E-01 2.7038E+00 8.2048E+00 -1.1983E+01 8.7261E+00 -2.5526E+00 S3 3.6364E-02 -1.4294E-01 1.0657E+00 -5.5889E+00 1.7346E+01 -3.2583E+01 3.6280E+01 -2.1936E+01 5.5351E+00 S4 1.1603E-01 -5.1548E-01 3.0701E+00 -1.3077E+01 3.6283E+01 -6.3269E+01 6.6532E+01 -3.8256E+01 9.1741E+00 S5 5.1401E-02 -2.4029E-01 4.8356E-01 -4.4804E-01 -4.2767E-01 1.8446E+00 -2.4234E+00 1.5872E+00 -4.3625E-01 S6 4.5151E-02 -3.0392E-01 7.9120E-01 -1.2760E+00 1.1537E+00 -2.9148E-01 -4.9926E-01 5.1992E-01 -1.5493E-01 S7 1.1708E-01 -6.6753E-01 1.7885E+00 -3.0607E+00 3.5612E+00 -2.8521E+00 1.5109E+00 -4.7107E-01 6.4381E-02 S8 1.0199E-01 -6.0669E-01 1.4911E+00 -2.2303E+00 2.2417E+00 -1.5527E+00 7.1430E-01 -1.9472E-01 2.3461E-02 S9 2.8934E-02 -1.7627E-01 3.2922E-01 -3.4540E-01 2.3295E-01 -1.0471E-01 3.0490E-02 -5.0989E-03 3.4453E-04 S10 2.0612E-02 -2.5362E-02 5.0868E-02 -7.0916E-02 6.4883E-02 -3.4853E-02 1.0205E-02 -1.2772E-03 8.7040E-06 S11 -1.5031E-01 9.3257E-02 9.8186E-02 -3.4763E-01 4.6283E-01 -3.4069E-01 1.4340E-01 -3.2138E-02 2.9644E-03 S12 -1.8646E-01 1.5250E-01 -1.0828E-01 5.3274E-02 -1.4537E-02 1.3213E-03 2.3666E-04 -4.5766E-05 0.0000E+00

[0087] Example 2

[0088] The following is for reference Figure 3 Describes an optical imaging lens according to Embodiment 2 of this application.

[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 within the lens barrel. The imaging lens group may sequentially 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 along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element, such as a filter, may also be disposed on the image side of the sixth lens E6. 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 in this embodiment is the same as that of the imaging lens group in Embodiment 1. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 1, and the aspherical coefficient table is the same as that in Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some 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 is for reference Figure 4 Describes an optical imaging lens according to Embodiment 3 of this application.

[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 within the lens barrel. The imaging lens group may sequentially 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 along the optical axis from the object side to the image side. An aperture 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, the optical element being, for example, a filter, having an object side surface S13 (not shown) and an image side surface S14 (not shown). Light from the object sequentially passes through each surface S1 to S14 and is finally imaged onto the 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 in this embodiment is the same as that of the imaging lens group in Embodiment 1. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 1, and the aspherical coefficient table is the same as that in Table 2. The difference between this embodiment and Embodiment 1 is that the structural dimensions of at least some 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 curves of the optical imaging lenses of Embodiments 1, 2, or 3 are shown, which represent the deviations in image height at different points on the imaging plane after light passes through the lens. Figure 6 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 1, 2, or 3 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 7 The astigmatism curves of the optical imaging lenses of Embodiments 1, 2 or 3 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 8 The distortion curves of the optical imaging lenses of Embodiments 1, 2, or 3 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 5 , Figure 6 , Figure 7 and Figure 8 It can be seen that the optical imaging lenses of Embodiments 1, 2 or 3 can achieve good imaging quality.

[0096] Example 4

[0097] The following is for reference Figure 9 Describes an optical imaging lens according to Embodiment 4 of this application.

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

[0099] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave. In this example, the image-side of the sixth lens E6 may also be provided with an optical element, such as a filter, having an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged onto 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 from entering the next lens during the imaging process, while also allowing for better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

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

[0102] Table 3

[0103]

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

[0105] Table 4

[0106]

[0107]

[0108] Example 5

[0109] The following is for reference Figure 10 Describes an optical imaging lens according to Embodiment 5 of this application.

[0110] like Figure 10 As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed within the lens barrel. The imaging lens group may include, sequentially from the object side to the image side along the optical axis, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element, such as a filter, may also be disposed on the image side of the sixth lens E6. 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 in this embodiment is the same as that in Embodiment 4. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 3, and the aspherical coefficient table is the same as that in Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some 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 is for reference Figure 11 Describes an optical imaging lens according to Embodiment 6 of this application.

[0114] like Figure 11As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed within the lens barrel. The imaging lens group may sequentially 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 along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element, such as a filter, may also be disposed on the image side of the sixth lens E6. 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 in this embodiment is the same as that in Embodiment 4. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 3, and the aspherical coefficient table is the same as that in Table 4. The difference between this embodiment and Embodiment 4 is that the structural dimensions of at least some of the elements in the lens barrel and spacer element group are different.

[0116] Figure 12 The magnification chromatic aberration curves of the optical imaging lenses of Embodiments 4, 5, or 6 are shown, which represent the deviations in image height at different points on the imaging plane after light passes through the lens. Figure 13 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 4, 5, or 6 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 14 The astigmatism curves of the optical imaging lenses of Embodiments 4, 5, or 6 are shown, which represent the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 15 The distortion curves of the optical imaging lenses of Embodiments 4, 5, or 6 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 12 , Figure 13 , Figure 14 and Figure 15 It can be seen that the optical imaging lenses of embodiments 4, 5 or 6 can achieve good imaging quality.

[0117] Example 7

[0118] The following is for reference Figure 16 Describes an optical imaging lens according to Embodiment 7 of this application.

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

[0120] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being convex. In this example, the image-side of the sixth lens E6 may also be provided with an optical element, such as a filter, having an object-side surface S13 (not shown) and an image-side surface S14 (not shown). Light from the object passes sequentially through each surface S1 to S14 and is finally imaged onto 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, 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 can block excess light from entering the next lens during the imaging process, while also allowing for better contact between the lens and the lens barrel, thus enhancing the structural stability of the optical imaging lens.

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

[0123] Table 5

[0124]

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

[0126] Table 6

[0127]

[0128]

[0129] Example 8

[0130] The following is for reference Figure 17 Describes an optical imaging lens according to Embodiment 8 of this application.

[0131] like Figure 17 As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed within the lens barrel. The imaging lens group may sequentially 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 along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element, such as a filter, may also be disposed on the image side of the sixth lens E6. 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, and 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 in this embodiment is the same as that in Embodiment 7. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 5, and the aspherical coefficient table is the same as that in Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some of the elements in the lens barrel and spacer element group are different.

[0133] Example 9

[0134] The following is for reference Figure 18 Describes an optical imaging lens according to Embodiment 9 of this application.

[0135] like Figure 18As shown, the optical imaging lens may include a lens barrel and an imaging lens group and a spacer element group disposed within the lens barrel. The imaging lens group may sequentially 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 along the optical axis from the object side to the image side. An aperture stop STO (not shown) may be disposed between the second lens E2 and the third lens E3. An optical element, such as a filter, may also be disposed on the image side of the sixth lens E6. 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, and 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 in this embodiment is the same as that in Embodiment 7. That is, the basic parameter table of the optical imaging lens in this embodiment is the same as that in Table 5, and the aspherical coefficient table is the same as that in Table 6. The difference between this embodiment and Embodiment 7 is that the structural dimensions of at least some of the elements in the lens barrel and spacer element group are different.

[0137] Figure 19 The magnification chromatic aberration curves of the optical imaging lenses of Embodiments 7, 8, or 9 are shown, which represent the deviations in image height at different points on the imaging plane after light passes through the lens. Figure 20 The on-axis chromatic aberration curves of the optical imaging lenses of Embodiments 7, 8, or 9 are shown, which represent the deflection of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 21 The astigmatism curves of the optical imaging lenses of Embodiments 7, 8, or 9 are shown, representing the meridional and sagittal image plane curvatures corresponding to different image heights. Figure 22 The distortion curves of the optical imaging lenses of Embodiments 7, 8, or 9 are shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figure 19 , Figure 20 , Figure 21 and Figure 22 It can be seen that the optical imaging lenses of embodiments 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 for each embodiment in 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 d1s, d2m, d3s, D4m, d5s, d5m, D5s, D0s, D0m, EP01, EP23, EP45, EP56, CP4, CP5, L, ∑AT, ∑EP, and ∑CP5 for each embodiment in Examples 1 to 9. The parameters d1s, d2m, d3s, D4m, d5s, d5m, D5s, D0s, D0m, EP01, EP23, EP45, CP4, CP5, and L can be calculated according to... Figure 1 The measurements were obtained using the annotation method shown, and the units for all parameters listed in Table 8 are mm.

[0142] Table 8

[0143] Example parameters 1 2 3 4 5 6 7 8 9 d1s 1.73 1.71 1.71 1.67 1.67 1.67 1.71 1.90 1.90 d2m 2.26 1.57 1.53 1.73 1.46 2.44 2.01 2.01 2.01 d3s 2.25 2.78 2.27 2.10 2.25 2.40 1.94 1.88 1.95 D4m 4.30 4.30 4.30 4.42 3.52 3.52 4.30 4.20 4.30 d5s 3.26 3.35 3.25 3.15 3.00 3.00 3.13 2.97 2.97 d5m 3.57 3.38 3.28 3.20 3.20 3.20 3.17 3.47 3.47 D5s 4.16 4.16 3.95 4.62 4.26 4.26 3.94 3.68 3.89 D0s 4.48 4.50 4.50 4.96 4.70 4.70 4.50 4.51 4.50 D0m 6.49 7.14 7.14 6.88 7.14 7.34 5.67 6.57 7.14 EP01 0.65 0.57 0.57 0.70 0.58 0.58 0.75 0.69 0.75 EP23 0.43 0.62 0.42 0.36 0.45 0.43 0.44 0.36 0.44 EP45 0.35 0.37 0.35 0.30 0.31 0.31 0.36 0.36 0.36 EP56 0.00 0.00 0.00 0.00 0.85 0.85 0.00 0.00 0.00 CP4 0.02 0.02 0.02 0.20 0.03 0.02 0.02 0.02 0.02 CP5 0.40 0.40 0.57 0.54 0.54 0.54 0.40 0.76 0.76 L 5.11 5.03 5.03 5.09 5.03 5.03 5.11 4.96 5.21 ∑AT 2.06 2.06 2.06 1.93 1.93 1.93 2.10 2.10 2.10 ∑EP 2.42 2.53 2.57 2.20 3.34 3.15 2.71 2.40 2.71 ∑CP5 0.41 0.41 0.59 0.54 0.54 0.54 0.40 0.78 0.78

[0144] Table 9 shows the values ​​of the conditional expressions for each of the embodiments in 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] This application also provides an imaging device, wherein the electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0148] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, include: The imaging lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side; A group of spacers includes a fifth spacer element, which 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 The lens barrel, the imaging lens group and the spacer element group are disposed in the lens barrel; The optical imaging lens has six lenses with optical power. The optical imaging lens meets the following requirement: 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 half field of view of the optical imaging lens, R9 is the radius of curvature of the object side of the fifth lens, R12 is the radius of curvature 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, characterized in that, The optical imaging lens satisfies: 1.74≤TD*tan(Semi-FOV) / D0m≤2.56; Wherein, TD is the distance from the object side of the first lens to the image side of the sixth lens on the optical axis, and D0m is the outer diameter of the image side end face of the lens barrel.

3. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens satisfies: 1.79≤D0m / d5m≤2.29; Wherein, D0m is the outer diameter of the image-side end face of the lens tube, and d5m is the inner diameter of the image-side surface of the fifth spacer element.

4. The optical imaging lens according to claim 1, characterized in that, 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 contacts the image side 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 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, characterized in that, The spacer group further includes a fourth spacer element, which is disposed on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; The optical imaging lens satisfies the following conditions: -1.97≤R9 / R10≤-1.50, 0.83≤D4m / D5s≤1.14; Wherein, R9 is the radius of curvature of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens, D4m is the outer diameter of the image side of the fourth spacer element, and D5s is the outer diameter of the object side of the fifth spacer element.

6. The optical imaging lens according to claim 5, characterized in that, 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 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.

7. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a first spacer element, which is disposed on the image side of the first lens and at least partially contacts the image side of the first lens; The optical imaging lens satisfies the following condition: 2.37 ≤ D0s / d1s ≤ 2.97; Wherein, D0s is the outer diameter of the object-side end face of the lens barrel, and d1s is the inner diameter of the object-side side face of the first spacer element.

8. The optical imaging lens according to claim 7, characterized in that, The optical imaging lens satisfies: -7.38≤f1 / EP01≤-5.19; Where f1 is the effective focal length of the first lens, and EP01 is the distance from the object-side end face of the lens barrel to the object-side surface of the first spacer element in a direction parallel to the optical axis.

9. The optical imaging lens according to claim 1, characterized in that, 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 contacts the image side of the third lens; The optical imaging lens satisfies the following condition: -1.23 ≤ R6 / d3s ≤ -0.72; Wherein, R6 is the radius of curvature of the image side of the third lens, and d3s is the inner diameter of the object side of the third spacer element.

10. The optical imaging lens according to claim 9, characterized in that, 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 contacts the image side of the second lens; The optical imaging lens satisfies the following condition: -0.34≤(d3s-d2m) / EP23≤1.94; Wherein, d3s is the inner diameter of the object side of the third spacer element, d2m is the inner diameter of the image side of the second spacer element, and EP23 is the spacing distance between the second spacer element and the third spacer element in a direction parallel to the optical axis.

11. The optical imaging lens according to claim 10, characterized in that, The optical imaging lens satisfies: 0.32≤EP23 / (CT3*N3)≤0.56; Wherein, EP23 is the distance between the second spacer element and 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.

12. The optical imaging lens according to claim 1, characterized in that, 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 is at least partially in contact with the image side surface of the fourth lens; The sixth spacer element is disposed on the image side of the sixth lens and is at least partially in contact with the image side surface of the sixth lens; The optical imaging lens satisfies the following condition: 0.07≤(EP45+EP56) / f56≤0.27; Wherein, EP45 is the spacing distance between the fourth and fifth spacers along a direction parallel to the optical axis, EP56 is the spacing distance between the fifth and sixth spacers along a direction parallel to the optical axis, and f56 is the combined focal length of the fifth and sixth lenses.

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 distance between the first lens and the second lens on the optical axis.

Images