Optical imaging lens

Abstract

The present application discloses an optical imaging lens. The optical imaging lens includes a lens barrel, a lens group, and a support member group disposed within the lens barrel. Among them, the lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power. The support member group includes a second support member and a fourth support member; the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy 0.9 < f / tan(Semi-FOV) < 1.5; the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the maximum height L of the lens barrel along the optical axis direction satisfy 2.6 < L / (CT1 + CT2 + CT3) < 3.0; the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D2s of the object-side face of the second support member, and the refractive index N1 of the first lens satisfy 2.2 < d0s / D2s × N1 < 2.8.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical imaging lens. Background Technology

[0002] With the development of the VR / AR industry, optical lenses are widely used in scenarios such as photography, spatial recognition, and positioning. As consumer electronics products such as mobile phones, tablets, and drones continue to innovate and upgrade their functions, people have increasingly higher requirements for the function and imaging quality of lenses.

[0003] For ultra-wide-angle lenses, the radial dimension of the first lens element is usually large, and the front lens element occupies most of the space inside the lens barrel. This causes the pressure to be concentrated at the rear of the lens after assembly, thus affecting the assembly stability. Therefore, how to improve the assembly stability of ultra-wide-angle lenses by rationally designing the distribution of lens elements and supporting components while ensuring image quality has always been one of the research directions that those skilled in the art are striving for. Summary of the Invention

[0004] The first aspect of the present application provides an optical imaging lens, which includes: a lens barrel, a lens group, and a support member group disposed within the lens barrel. Among them, the lens group sequentially includes, from the object side to the image side along the optical axis: a first lens with a negative optical power, a second lens with a positive optical power, a third lens with a positive optical power, a fourth lens with a positive optical power, a fifth lens with a negative optical power, a sixth lens with a positive optical power, and a seventh lens with a negative optical power. The first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, and the effective semi-aperture of its object side is greater than the effective semi-apertures of other lenses within the lens group; the object side of the third lens is concave and the image side is convex; the object side of the fourth lens is convex and the image side is convex; the object side of the fifth lens is concave and the image side is concave; the object side of the sixth lens is convex and the image side is convex; and the object side of the seventh lens is convex and the image side is concave; the support member group includes: a second support member disposed on the image side of the second lens and at least partially contacting the image side of the second lens, and a fourth support member disposed on the image side of the fourth lens and at least partially contacting the image side of the fourth lens; the effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: 0.9 < f / tan(Semi-FOV) < 1.5; the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the maximum height L of the lens barrel along the optical axis direction satisfy: 2.6 < L / (CT1 + CT2 + CT3) < 3.0; and the inner diameter d0s of the object side end face of the lens barrel, the outer diameter D2s of the object side of the second support member, and the refractive index N1 of the first lens satisfy: 2.2 < d0s / D2s × N1 < 2.8.

[0005] A second aspect of this application provides an optical imaging lens comprising: a lens barrel and a lens group and a support assembly disposed within the lens barrel, wherein the lens group comprises, sequentially from the object side to the image side along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein the first lens is a meniscus lens facing the image side with negative optical power; the second lens has positive optical power; the third lens has positive optical power, with its object side being concave and its image side being convex; the fourth lens has positive optical power, with its object side being convex and its image side being convex; the fifth lens has negative optical power, with its object side being concave and its image side being concave; and the sixth lens... The first lens has positive optical power, with a convex object side and a convex image side, and the seventh lens has negative optical power, with a convex object side and a concave image side. The support assembly includes a fourth support member placed on the image side of the fourth lens and in at least partial contact with the image side of the fourth lens. The effective half-aperture of the object side of the fourth lens is smaller than the effective half-aperture of the other lenses in the lens assembly. The inner diameter d0s of the object side end face of the lens barrel, the outer diameter D4m of the image side of the fourth support member, the effective half-aperture DT11 of the object side of the first lens, and the effective half-aperture DT41 of the object side of the fourth lens satisfy: 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1.

[0006] In one embodiment, the outer diameter D2m of the image side of the second support member, the outer diameter D4s of the object side of the fourth support member, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.9 < (D2m - D4s) / CT4 < 2.1.

[0007] In one embodiment, the effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT21 of the object side of the second lens satisfy: 2.5mm <DT11-DT21<5mm。

[0008] In one embodiment, the center thickness CT3 of the third lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the maximum thickness CP2 of the second support member along the optical axis satisfy: 32.0 <CT3 / CT2+T23 / CP2<34.0。

[0009] In one embodiment, the radius of curvature R2 of the image-side surface of the first lens, the center thickness CT1 of the first lens along the optical axis, and the refractive index N1 of the first lens satisfy: 1.9 < (R2 / CT1) / N1 < 2.7; and the inner diameter d2s of the object-side surface of the second support member, the maximum thickness CP2 of the second support member along the optical axis, and the Abbe number V2 of the second lens satisfy: 10.0. <d2s / CP2 / V2<15.5。

[0010] In one embodiment, the support assembly further includes a fifth support member disposed on the image side of the fifth lens and in at least partial contact with the image side of the fifth lens; the radius of curvature R9 of the object side of the fifth lens, the radius of curvature R10 of the image side of the fifth lens, the inner diameter d4s of the object side of the fourth support member and the inner diameter d5s of the object side of the fifth support member satisfy: -7.2<(R9+R10) / (d5s-d4s)<-2.8.

[0011] In one embodiment, the effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4m of the image-side surface of the fourth support member satisfy: 0.6 <f4 / N4 / d4m<1.0。

[0012] In one embodiment, the optical imaging lens further includes a sixth support member disposed on the image side of the sixth lens and in at least partial contact with the image side of the sixth lens; the inner diameter d6m of the image side of the sixth support member, the inner diameter d6s of the object side of the sixth support member, the effective focal length f6 of the sixth lens and the radius of curvature R12 of the image side of the sixth lens satisfy: 0.6<(d6m-d6s) / (f6 / R12)<1.0.

[0013] In one embodiment, the effective half-aperture of the object side of the fourth lens is smaller than the effective half-aperture of the other lenses in the lens group; and the inner diameter d0s of the object side end face of the lens barrel, the outer diameter D4m of the image side of the fourth support member, the effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT41 of the object side of the fourth lens satisfy: 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1.

[0014] In one embodiment, the maximum thickness CP6 of the sixth support member along the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy: 1.0≤CP6 / CT6<1.5.

[0015] In one embodiment, the distance TD between the object-side surface of the first lens and the image-side surface of the seventh lens on the optical axis, the inner diameter d0m of the image-side end face of the lens barrel, and the inner diameter d0s of the object-side end face of the lens barrel satisfy: -3.2 <TD / (d0m-d0s)<-2.5。

[0016] In one embodiment, the distance TD between the object-side surface of the first lens and the image-side surface of the seventh lens along the optical axis, and the distance EP24 between the image-side surface of the second support member and the object-side surface of the fourth support member along the optical axis, satisfy: 2.0 <TD / EP24<3.1。

[0017] In one embodiment, the seventh lens has at least one inflection point on its object-side or image-side surface; the inner diameter d0m of the image-side end face of the lens barrel, the effective focal length f7 of the seventh lens, the radius of curvature R13 of the object-side surface of the seventh lens, and the radius of curvature R14 of the image-side surface of the seventh lens satisfy: -3.8 <d0m / (f7 / (R13+R14))<-1.5。

[0018] In one embodiment, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2s of the object side of the second support member, and the inner diameter d2s of the object side of the second support member satisfy: 0.8 < (f2 / f3) / (D2s / d2s) < 3.5.

[0019] In one embodiment, the maximum thickness CP6 of the sixth support member along the optical axis, the maximum thickness CP5 of the fifth support member along the optical axis, the air gap T67 between the sixth and seventh lenses on the optical axis, and the air gap T56 between the fifth and sixth lenses on the optical axis satisfy: 69.5 < (CP6 / CP5) + (T67 / T56) < 80.

[0020] In one embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1 mm.

[0021] In one embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third and fourth lenses.

[0022] The present application provides a seven-piece ultra-wide-angle lens. Through a reasonable combination of positive and negative optical powers and surface shapes, it is beneficial to control the light path, achieve the characteristics of ultra-wide angle and high resolution, better meet the requirements of industrial applications, and satisfy 0.9 < f / tan(Semi-FOV) < 1.5. The first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, the radial size of the first lens is larger than that of other lenses, and the first, second, and third lenses occupy most of the space inside the lens barrel. This is conducive to better realizing the ultra-wide-angle characteristics and shortening the overall lens size. However, it will cause a relatively large volume of the front-end lens, a relatively large displacement of the lens assembly under pressure, and a serious pressure on the rear end of the lens, thus affecting the assembly stability. By controlling 2.6 < L / (CT1 + CT2 + CT3) < 3.0 and 2.2 < d0s / D2s × N1 < 2.8 within the specified range, the volume and spatial distribution of the front three lenses can be ensured, without causing the lens center of gravity to shift. At the same time, by restricting the ratio of the inner diameter of the object side end of the lens barrel to the outer diameter of the object side surface of the second supporting member and the refractive index of the first lens, while ensuring the required hardness of the first lens, the radial step difference between the first lens and the second lens can be controlled within a reasonable range, which is beneficial to distributing the pressure positions of the lenses, reducing the pressure of the front-end lens on the rear-end lens, increasing the stability of the first, second, and third lenses, and improving the overall assembly stability of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 Shows a structural layout diagram of an optical imaging lens and a schematic diagram of some parameters according to the present application;

[0025] Figures 2A to 2C Shows a schematic diagram of the pressure-induced deformation displacement of the optical imaging lens according to the present application in three cases;

[0026] Figure 3A Shows a structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application;

[0027] Figure 3B Shows a structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application;

[0028] Figures 4A to 4C Respectively show the axial chromatic aberration curve, astigmatism curve, and longitudinal chromatic aberration curve of the optical imaging lens according to Embodiment 1 and Embodiment 2 of the present application;

[0029] Figure 5A Shows a structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application;

[0030] Figure 5B A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0031] Figures 6A to 6C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lens according to Embodiments 3 and 4 of this application are shown respectively.

[0032] Figure 7A A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0033] Figure 7B A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown; and

[0034] Figures 8A to 8C The on-axis chromatic aberration curve, astigmatism curve, and magnification chromatic aberration curve of the optical imaging lenses according to Embodiments 5 and 6 of this application are shown respectively. Detailed Implementation

[0035] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] 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 or third lens.

[0037] 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.

[0038] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0039] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0040] 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.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. For example, the lens group, lens barrel, and support member in the various embodiments of this application can be arbitrarily combined, and it is not limited to the lens group in one embodiment being combined only with the lens barrel, support member, etc. of that embodiment.

[0042] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Figure 1 This diagram illustrates the structural layout and schematic diagram of some parameters of an optical imaging lens according to this application. Those skilled in the art will understand that some parameters commonly used in the art (e.g., the center thickness CT1 of the first lens on the optical axis) are not shown in the diagram. Figure 1 As shown in the figure, Figure 1 The following are merely illustrative examples of partial parameters of the lens barrel and support member of an optical imaging lens according to this application, to facilitate a better understanding of the invention. Figure 1As shown, CP2 represents the maximum thickness of the second support member along the optical axis, CP5 represents the maximum thickness of the fifth support member along the optical axis, CP6 represents the maximum thickness of the sixth support member along the optical axis, EP24 represents the distance from the image side of the second support member to the object side of the fourth support member along the optical axis, d0smin represents the minimum aperture of the lens barrel in the direction perpendicular to the optical axis, d2s represents the inner diameter of the object side of the second support member, D2s represents the outer diameter of the object side of the second support member, D2m represents the outer diameter of the image side of the second support member, d0s represents the inner diameter of the object side end face of the lens barrel, d4s represents the inner diameter of the object side of the fourth support member, d5s represents the inner diameter of the object side of the fifth support member, d6s represents the inner diameter of the object side of the sixth support member, D4m represents the outer diameter of the image side of the fourth support member, d6m represents the inner diameter of the image side of the sixth support member, and d0m represents the inner diameter of the image side end face of the lens barrel.

[0043] An optical imaging lens according to an exemplary embodiment of this application includes a lens barrel and a lens assembly and a support assembly disposed within the lens barrel. The lens assembly, along the optical axis from the object side to the image side, sequentially includes: a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. The first lens is a meniscus-shaped lens facing the image side; the third lens has a concave object side and a convex image side; the fourth lens has a convex object side and a convex image side; the fifth lens has a concave object side and a concave image side; the sixth lens has a convex object side and a convex image side; and the seventh lens has a convex object side and a concave image side. This application, through a reasonable combination of positive and negative optical powers and surface shapes, facilitates the control of light trajectory, achieving ultra-wide-angle, large image area, and high resolution characteristics, and can better meet the needs of industry applications. In an exemplary embodiment, the first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, and the effective half-aperture of its object side is greater than the effective half-aperture of the other lenses in the lens group.

[0044] In an exemplary embodiment, the support member group of the optical imaging lens may include at least one of a first support member, a second support member, a third support member, a fourth support member, a fifth support member, and a sixth support member. The first support member is disposed on the image side of the first lens and at least partially contacts the image side surface of the first lens. The second support member is disposed on the image side of the second lens and at least partially contacts the image side surface of the second lens. The third support member is disposed on the image side of the third lens and at least partially contacts the image side surface of the third lens. The fourth support member is disposed on the image side of the fourth lens and at least partially contacts the image side surface of the fourth lens. The fifth support member is disposed on the image side of the fifth lens and at least partially contacts the image side surface of the fifth lens. The sixth support member is disposed on the image side of the sixth lens and at least partially contacts the image side surface of the sixth lens. It should be understood that the present application does not specifically limit the number of support members. Any number of support members may be included between any two lenses, and the entire optical imaging lens may also include any number of support members. The support members help the optical imaging lens intercept redundant refracted and reflected light paths, reducing the generation of stray light and ghost images. Adding auxiliary supports between the support members and the lens barrel is beneficial to improving problems such as poor assembly stability and low performance yield caused by large step differences between the lenses.

[0045] In an exemplary embodiment, the support member group may include a second support member, a fourth support member, a fifth support member, and a sixth support member.

[0046] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.9 < f / tan(Semi-FOV) < 1.5, where f is the effective focal length of the optical imaging lens, and Semi-FOV is the maximum half field angle of the optical imaging lens.

[0047] In an exemplary embodiment, the maximum half field angle Semi-FOV of the optical imaging lens according to the present application may be in the range of 70° to 75°.

[0048] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.6 < L / (CT1 + CT2 + CT3) < 3.0, where CT1 is the central thickness of the first lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, CT3 is the central thickness of the third lens on the optical axis, and L is the maximum height of the lens barrel along the optical axis direction.

[0049] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.2 < d0s / D2s × N1 < 2.8, where d0s is the inner diameter of the object side end face of the lens barrel, D2s is the outer diameter of the object side surface of the second support member, and N1 is the refractive index of the first lens.

[0050] The optical imaging lens according to the exemplary embodiment of the present application is a seven-piece ultra-wide-angle lens. By reasonably matching the positive and negative optical powers and surface shapes, it is beneficial to control the light path, achieve the characteristics of ultra-wide angle and high resolution, and better meet the industry application requirements. The effective focal length f of the optical imaging lens and the maximum semi-field angle Semi-FOV of the optical imaging lens satisfy: 0.9 < f / tan(Semi-FOV) < 1.5; the first lens is a meniscus lens facing the image side, the refractive index N1 of the first lens is less than 1.55, and the effective semi-aperture of its object side is greater than the effective semi-apertures of other lenses in the lens group. The first lens, the second lens, and the third lens occupy most of the space inside the lens barrel, which is beneficial to better achieve the ultra-wide angle characteristic and shorten the overall lens size. However, it will cause a relatively large front-end lens volume, a relatively large displacement of the lens assembly under pressure, and a serious pressure on the rear end of the lens, thus affecting the assembly stability. In the exemplary embodiment, in order to ensure the hardness of the first lens, the first lens can be made of glass. Since the weight of the glass lens is higher than that of the plastic lens, this will increase the displacement of the lens assembly under pressure and the severity of the pressure on the rear end of the lens. By controlling 2.6 < L / (CT1 + CT2 + CT3) < 3.0 and 2.2 < d0s / D2s × N1 < 2.8 within the said range, the volume and spatial distribution of the first three lenses can be ensured, and the center of gravity of the lens will not shift. At the same time, by restricting the ratio of the inner diameter of the object side end of the lens barrel to the outer diameter of the object side of the second bearing member and the refractive index of the first lens, while ensuring the required hardness of the first lens, the radial step difference between the first lens and the second lens can be controlled within a reasonable range, which is beneficial to distributing the pressure position of the lenses, reducing the pressure of the front-end lens on the rear-end lens, increasing the stability of the first lens, the second lens, and the third lens, and improving the overall assembly stability of the lens.

[0051] By controlling 2.6 < L / (CT1 + CT2 + CT3) < 3.0 and 2.2 < d0s / D2s × N1 < 2.8 within the said range, the optical imaging lens provided by the present application has good assembly stability while having the technical advantages of ultra-wide angle and large image plane, and can better meet the industry application requirements.

[0052] The following combines Figures 2A to 2C , and further illustrates the role of the technical solution of the present application in improving the overall assembly stability of the lens. Figures 2A to 2C The schematic diagrams of the deformation displacement under pressure in three cases of the optical imaging lens according to the present application when Semi-FOV = 72° are shown, which can intuitively display the deformation displacement that may occur after the lens assembly is under pressure. Among them, positive values represent moving in the object side direction, negative values represent moving in the image side direction, and the darker the color, the greater the displacement of the lens and the greater the deformation pressure it bears.

[0053] Figure 2AThis is a schematic diagram of the deformation displacement of an optical imaging lens when d0s / D2s×N1=1.5 and (D2m-D4s) / CT4=0.5. Figure 2A The first to sixth lenses are lighter in color, while the seventh lens is darker. This indicates that when the values ​​of d0s / D2s×N1 and (D2m-D4s) / CT4 are both less than the control range of this application, the displacement of the seventh lens is significantly greater than that of the other lenses. In other words, the pressure is concentrated on the seventh lens at the rear of the lens, which will result in poor overall assembly stability.

[0054] Figure 2B This is a schematic diagram of the deformation displacement of an optical imaging lens when d0s / D2s×N1=2.5 and (D2m-D4s) / CT4=1.5. Figure 2B The colors of the lenses are relatively light and uniform, which indicates that when the values ​​of d0s / D2s×N1 and (D2m-D4s) / CT4 are within the control range of this application, the relative displacement of each lens is small and the pressure distribution is relatively uniform. By controlling the front and middle positions of the lens, the pressure on the rear of the lens is reduced, the bearing stability of the first, second and third lenses is increased, and the overall assembly stability of the lens is improved.

[0055] Figure 2C This is a schematic diagram of the deformation displacement of an optical imaging lens when d0s / D2s×N1=3.0 and (D2m-D4s) / CT4=3.0. Figure 2C The color distribution of each lens is uneven, with the first and second lenses being darker. This indicates that when the values ​​of d0s / D2s×N1 and (D2m-D4s) / CT4 are both greater than the control range of this application, the first and second lenses experience greater compressive deformation displacement, resulting in concentrated pressure at the front of the lens and poor overall assembly stability.

[0056] According to an exemplary embodiment of this application, the optical imaging lens is a seven-element ultra-wide-angle large-image-plane lens. The optical imaging lens includes: a lens barrel and a lens group and a support assembly disposed within the lens barrel. The lens group, along the optical axis from the object side to the image side, sequentially includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens is a meniscus lens with negative optical power facing the image side; the second lens has positive optical power; the third lens has positive optical power; and its object side is... The fourth lens has positive optical power, with its object side and image side both being convex; the fifth lens has negative optical power, with its object side and image side both being concave; the sixth lens has positive optical power, with its object side and image side both being convex; and the seventh lens has negative optical power, with its object side and image side both being convex; the supporting member assembly includes: a fourth supporting member disposed on the image side of the fourth lens and at least partially in contact with the image side of the fourth lens; wherein, the effective half of the object side of the fourth lens... The aperture is smaller than the effective half-aperture of the other lenses in the lens group; the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D4m of the image-side face of the fourth support member, the effective half-aperture DT11 of the object-side face of the first lens, and the effective half-aperture DT41 of the object-side face of the fourth lens satisfy: 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1. Through reasonable matching of positive and negative focal lengths and surface shapes, and the large radial dimension of the first lens, it is beneficial to achieve ultra-wide-angle characteristics. However, if the effective half-aperture of the object-side face of the first lens is too large, it will affect the support between lenses and the lens forming. This application controls the ratio of the difference between the inner diameter of the object-side face of the lens barrel and the outer diameter of the image-side face of the fourth support member to the difference between the effective half-apertures of the first and fourth lenses within a reasonable range. This can effectively control the largest radial segment difference of the lens, reasonably allocate the overall radial dimension of other lenses, and avoid the problem that the lens structure area is too short and affects the effective diameter area, or that the other lens structure areas are too long in order to match the height of the first lens, resulting in greater difficulty in lens forming.

[0057] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 0.9 < (D2m - D4s) / CT4 < 2.1, where D2m is the outer diameter of the image-side surface of the second support member, D4s is the outer diameter of the object-side surface of the fourth support member, and CT4 is the center thickness of the fourth lens on the optical axis. Satisfying 0.9 < (D2m - D4s) / CT4 < 2.1 ensures that the radial step difference between the second and fourth lenses is within a reasonable range and guarantees the center strength of the fourth lens. Controlling the position of the front and middle parts of the lens can reduce the pressure on the rear part of the lens, increase the support stability of the first, second, and third lenses, improve the overall assembly stability of the lens, and ensure that the center of gravity of the lens structure does not shift.

[0058] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.5 mm < DT11 - DT21 < 5 mm, where DT11 is the effective semi-aperture of the object side surface of the first lens, and DT21 is the effective semi-aperture of the object side surface of the second lens. Since this lens is an ultra-wide-angle lens, in order to shorten the overall length of the system, the radial dimensions of the first lens and the second lens are relatively large. The effective semi-apertures of the first lens and the second lens satisfy 2.5 mm < DT11 - DT21 < 5 mm, which can ensure that the center of gravity of the lens will not shift due to the excessive radial dimension of the object side surface of the first lens, and large-angle refraction will not occur to the light rays in the full field of view after passing through the first lens. As a result, when the light rays enter the second lens, the angles tend to be gentle, ultimately ensuring the rationality and stability of this ultra-wide-angle lens under the requirements of the specified external dimensions.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 32.0 < CT3 / CT2 + T23 / CP2 < 34.0, where CT3 is the central thickness of the third lens on the optical axis, CT2 is the central thickness of the second lens on the optical axis, T23 is the air gap between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second support member along the optical axis direction. When the central thickness, gap of the third lens and the second lens, and the second support member satisfy 32.0 < CT3 / CT2 + T23 / CP2 < 34. to reduce the sensitivity of the gap between the second lens and the third lens and improve the MTF yield.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.9 < (R2 / CT1) / N1 < 2.7 and 10.0 < d2s / CP2 / V2 < 15.5, where R2 is the radius of curvature of the image side surface of the first lens, CT1 is the central thickness of the first lens on the optical axis, N1 is the refractive index of the first lens, d2s is the inner diameter of the object side surface of the second support member, CP2 is the maximum thickness of the second support member along the optical axis direction, and V2 is the Abbe number of the second lens. Satisfying 1.9 < (R2 / CT1) / N1 < 2.7 and 10.0 < d2s / CP2 / V, by controlling the refractive index, central thickness and surface shape of the first lens, the Abbe number of the second lens, the maximum thickness of the second support member and the inner diameter of the object side surface, the processing formability of the first lens and the aperture range of the second support member are ensured, which can effectively prevent excess light from entering the third lens and effectively reduce the occurrence of stray light.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -7.2 < (R9 + R10) / (d5s - d4s) < -2.8, where 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, d4s is the inner diameter of the object side surface of the fourth support member, and d5s is the inner diameter of the object side surface of the fifth support member. By controlling the radii of curvature of the object side surface and the image side surface of the fifth lens and the inner diameters of the fourth and fifth support members within the range of the conditional formula -7.2 < (R9 + R10) / (d5s - d4s) < -2.8, it is beneficial to control the refraction angle of light when passing through the fifth lens. At the same time, the fourth and fifth support members can effectively reduce the generation of internal stray light of the fourth lens.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.6 < f4 / N4 / d4m < 1.0, where f4 is the effective focal length of the fourth lens, N4 is the refractive index of the fourth lens, and d4m is the inner diameter of the image side surface of the fourth support member. When controlling the changes in the focal length, refractive index of the fourth lens, and the aperture of the fourth support member to satisfy 0.6 < f4 / N4 / d4m < 1.0, it can ensure that the overall surface shape and the center thickness dimension of the fourth lens are within a range conducive to molding. At the same time, the inner diameter of the fourth support member plays a further role in blocking light for the subsequent light path within the optical imaging lens, isolating the emission of excess stray light rays.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 0.6 < (d6m - d6s) / (f6 / R12) < 1.0, where d6m is the inner diameter of the image side surface of the sixth support member, d6s is the inner diameter of the object side surface of the sixth support member, f6 is the effective focal length of the sixth lens, and R12 is the radius of curvature of the image side surface of the sixth lens. Satisfying 0.6 < (d6m - d6s) / (f6 / R12) < 1.0 and controlling the aperture of the sixth support member, the focal length of the sixth lens, and the radius of curvature of the image side surface within a suitable range can control the refraction of light by the sixth lens. Combining with the settings of the inner diameters of the object side surface and the image side surface of the sixth support member, it is beneficial to the assembly stability of the front and rear lenses in this space and effectively block the light at the edge, reducing the influence of stray light.

[0064] In an exemplary embodiment, the effective semi-aperture of the object side of the fourth lens of the optical imaging lens according to the present application is smaller than the effective semi-apertures of the other lenses within the lens group, and can satisfy: 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1, where d0s is the inner diameter of the object-side end face of the lens barrel, D4m is the outer diameter of the image side face of the fourth bearing member, DT11 is the effective semi-aperture of the object side face of the first lens, and DT41 is the effective semi-aperture of the object side face of the fourth lens. Satisfying 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1, controlling the ratio of the difference between the inner diameter of the object side face of the lens barrel and the outer diameter of the image side face of the fourth bearing member to the difference between the effective semi-apertures of the first lens and the fourth lens within a reasonable range can effectively control the largest radial segment difference of the lens, reasonably distribute the overall radial dimensions of the other lenses, and avoid the problem that the lens structure area is too short and affects the effective diameter area, or the problem that the lens structure area of the other lenses is too long in order to match the height of the first lens, resulting in greater difficulty in lens molding.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 1.0 ≤ CP6 / CT6 < 1.5, where CP6 is the maximum thickness of the sixth bearing member along the optical axis direction, and CT6 is the central thickness of the sixth lens on the optical axis. Satisfying 1.0 ≤ CP6 / CT6 < 1.5, by controlling the ratio of the thickness of the sixth bearing member to the central thickness of the sixth lens within this range, when the segment difference between the sixth lens and the seventh lens is large, the assembly stability of the last two lenses can be effectively ensured through the setting of the bearing member.

[0066] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: -3.2 < TD / (d0m - d0s) < -2.5, where TD is the distance on the optical axis from the object side face of the first lens to the image side face of the seventh lens, d0m is the inner diameter of the image-side end face of the lens barrel, and d0s is the inner diameter of the object-side end face of the lens barrel. Satisfying -3.2 < TD / (d0m - d0s) < -2.5 can effectively control the overall height of the lens barrel. Since this lens has a "three-piece plus four-piece two-end assembly" structure, this conditional expression can also control the inner diameters of the object-side end face and the image-side end face of the lens barrel, enabling effective light to pass through and ensuring that the overall size of the lens is not too large.

[0067] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.0 < TD / EP24 < 3.1, where TD is the distance on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens, and EP24 is the distance in the optical axis direction from the image side surface of the second support member to the object side surface of the fourth support member. Satisfying 2.0 < TD / EP24 < 3.1 is beneficial to reasonably allocate the internal space of the lens barrel while controlling the total length of the optical imaging lens by controlling the total length of the optical imaging lens and the distance from the image side surface of the second support member to the object side surface of the fourth support member.

[0068] In an exemplary embodiment, there is at least one inflection point on the object side surface or the image side surface of the seventh lens of the optical imaging lens according to the present application, and it may satisfy: -3.8 < d0m / (f7 / (R13 + R14)) < -1.5, where d0m is the inner diameter of the image side end surface of the lens barrel, f7 is the effective focal length of the seventh lens, R13 is the curvature radius of the object side surface of the seventh lens, and R14 is the curvature radius of the image side surface of the seventh lens. Satisfying -3.8 < d0m / (f7 / (R13 + R14)) < -1.5 can effectively ensure the optical aperture of the seventh lens by controlling the ratio of the inner diameter of the image side surface of the lens barrel to the curvature radius of the seventh lens; at the same time, the curvature radii of both sides of the seventh lens are controlled, ensuring the rationality of the lens surface shape, which is beneficial to the mold processing type and forming stability of the seventh lens.

[0069] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.8 < (f2 / f3) / (D2s / d2s) < 3.5, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, D2s is the outer diameter of the object side surface of the second support member, and d2s is the inner diameter of the object side surface of the second support member. Satisfying 0.8 < (f2 / f3) / (D2s / d2s) < 3.5 can control the effective focal lengths of the second lens and the third lens within a reasonable range, thereby ultimately imposing a certain limiting effect on the surface curvature of the second lens and the third lens, ensuring the rationality of mold processing. At the same time, the outer diameter and inner diameter of the second support member can be reasonably controlled, ensuring the possibility of eliminating internal stray light penetrating the second lens and the third lens by the second support member.

[0070] In an exemplary embodiment, the optical imaging lens according to this application satisfies: 69.5 < (CP6 / CP5) + (T67 / T56) < 80, where CP6 is the maximum thickness of the sixth support member along the optical axis, CP5 is the maximum thickness of the fifth support member along the optical axis, T67 is the air gap between the sixth and seventh lenses on the optical axis, and T56 is the air gap between the fifth and sixth lenses on the optical axis. Satisfying 69.5 < (CP6 / CP5) + (T67 / T56) < 80 ensures the thickness of the fifth and sixth support members, indirectly guaranteeing the range of the edge thickness of the sixth lens, which is beneficial to the manufacturability of the sixth lens. Simultaneously, controlling the air gap and the thickness of the support members improves the formability of the support members and ensures the stability of the overall rear lens assembly structure.

[0071] In an exemplary embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1 mm. This setting is beneficial for constraining the aperture size of this ultra-wide-angle lens, which can have a decisive influence on the overall shape of the optical system to a certain extent, and also affects the minimum forming size of the lens barrel.

[0072] In an exemplary embodiment, the minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third and fourth lens elements; that is, the aperture of the portion of the inner wall of the lens barrel located between the third and fourth lens elements is the smallest. The aperture stop is placed between the third and fourth lens elements, ensuring the required imaging magnification and reasonably guaranteeing the image height range across the entire field of view, thus improving the imaging quality at off-axis points.

[0073] In embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, at least one mirror surface from the object-side surface of the first lens to the image-side surface of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that its curvature changes continuously from the center to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspherical lenses have better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, the object-side and image-side surfaces of all lenses from the first to the seventh lens are aspherical mirror surfaces.

[0074] In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0075] The optical imaging lens according to the above embodiments of this application can employ multiple lens elements, such as the seven elements mentioned above. By rationally allocating the optical power, surface shape, and arrangement of the supporting components of each lens element, the range of each stop in the lens-tube fit is made more uniform, enhancing the light-gathering ability and improving the imaging quality of the ultra-wide-angle, large-image-plane optical imaging lens. However, those skilled in the art should understand that the number of lens elements constituting the optical imaging lens can be changed without departing from the technical solution claimed in this application to obtain the various results and advantages described in this specification. For example, although seven lens elements are described as an example in the embodiments, the optical imaging lens is not limited to including seven lens elements. If necessary, the optical imaging lens may also include other numbers of lens elements.

[0076] Specific embodiments of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. Specifically, refer to... Figures 3A to 4C Description of optical imaging lenses 1001 and 1002 according to embodiments 1 and 2 of this application; see reference Figures 5A to 6C Description of optical imaging lenses 2001 and 2002 according to embodiments 3 and 4 of this application; see reference Figures 7A to 8C The optical imaging lenses 3001 and 3002 according to embodiments 5 and 6 of this application are described.

[0077] Example 1

[0078] Figure 3A A schematic diagram of the structure of an optical imaging lens 1001 according to Embodiment 1 of this application is shown. Figure 3A As shown, the optical imaging lens 1001 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 1001 also includes an aperture stop STO (not shown) disposed between the third and fourth lens elements.

[0079] like Figure 3A As shown, the lens group of the optical imaging lens 1001, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The sixth lens E6 has an object-side surface S11 and an image-side surface S12. The seventh lens E7 has an object-side surface S13 and an image-side surface S14. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17 (not shown).

[0080] Table 1 shows the basic parameters of the lens group of the optical imaging lens 1001 in Embodiment 1, wherein the units of radius of curvature, thickness and effective focal length are all millimeters (mm).

[0081]

[0082] Table 1

[0083] In Example 1, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0084]

[0085] 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, A14 that can be used for each aspherical mirror S1-S14 in Example 1. 10 A 12 A 14 and A 16 .

[0086]

[0087]

[0088] Table 2

[0089] Table 3 shows the values ​​of the effective focal length f and the maximum semi-FOV of the optical imaging lens 1001.

[0090] parameter f(mm) Semi-FOV (°) numerical values 3.88 71.24

[0091] Table 3

[0092] like Figure 3AAs shown, the optical imaging lens 1001 also includes four supporting members: a second supporting member P2, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6. The second supporting member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth supporting member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth supporting member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth supporting member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 4 shows the basic parameters of the supporting members of the optical imaging lens 1001, where all parameters are in millimeters (mm). These supporting members can block excess external light from entering, allowing the lens and lens barrel to better support each other, and enhancing the structural stability of the optical imaging lens 1001.

[0093] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 5.530 9.329 9.329 3.920 6.334 4.874 5.363 6.950 16.290 10.538 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 6.696 0.018 1.176 2.967 6.76 3.49 3.36 2.78 1.50 parameter DT42 L D4s d4m numerical values 1.98 14.881 6.334 3.9198

[0094] Table 4

[0095] Example 2

[0096] Figure 3B A schematic diagram of the optical imaging lens 1002 according to Embodiment 2 of this application is shown. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments.

[0097] like Figure 3B As shown, the optical imaging lens 1002 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 1002 also includes an aperture stop STO (not shown) disposed between the third and fourth lens groups. The lens groups of the optical imaging lens 1002 are exactly the same as those of the optical imaging lens 1001 in Embodiment 1, and their basic parameters are detailed in Tables 1 to 3, and will not be repeated here.

[0098] like Figure 3B As shown, the optical imaging lens 1002 also includes four supporting members: a second supporting member P2, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6. The second supporting member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth supporting member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth supporting member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth supporting member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 5 shows the basic parameters of the supporting members of the optical imaging lens 1002, where all parameters are in millimeters (mm). These supporting members can block excess external light from entering, allowing the lens and lens barrel to better support each other, and enhancing the structural stability of the optical imaging lens 1002.

[0099] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 5.607 9.629 9.629 3.920 6.950 4.934 5.423 6.950 16.332 10.838 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 6.696 0.018 1.176 2.967 6.76 3.49 3.36 2.78 1.50 parameter DT42 L D4s d4m numerical values 1.98 14.881 6.950 3.9198

[0100] Table 5

[0101] Figure 4A The on-axis chromatic aberration curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 4B The astigmatism curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The magnification chromatic aberration curves of the optical imaging lens 1001 of Embodiment 1 and the optical imaging lens 1002 of Embodiment 2 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 4A to 4C It can be seen that the optical imaging lens 1001 and optical imaging lens 1002 given in Embodiments 1 and 2 can achieve good imaging quality.

[0102] Example 3

[0103] Figure 5A A schematic diagram of the structure of an optical imaging lens 2001 according to Embodiment 3 of this application is shown. Figure 5A As shown, the optical imaging lens 2001 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 2001 also includes an aperture stop STO (not shown) disposed between the third and fourth lens elements.

[0104] like Figure 5A As shown, the lens group of the optical imaging lens 2001, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The sixth lens E6 has an object-side surface S11 and an image-side surface S12. The seventh lens E7 has an object-side surface S13 and an image-side surface S14. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17 (not shown).

[0105] Table 6 shows the basic parameters of the lens group of the optical imaging lens 2001 in Embodiment 3, wherein the units of radius of curvature, thickness and effective focal length are millimeters (mm). Table 7 shows the higher-order coefficients that can be used for each aspherical mirror in Embodiment 3, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0106]

[0107]

[0108] Table 6

[0109] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.61E-04 9.53E-05 -6.63E-06 2.75E-07 -6.76E-09 9.20E-11 -5.30E-13 S2 -4.01E-03 9.44E-04 -2.65E-04 5.38E-05 -6.83E-06 4.67E-07 -1.32E-08 S3 7.76E-03 -1.29E-03 1.87E-04 -3.04E-05 2.40E-06 -6.47E-08 0.00E+00 S4 1.61E-02 -2.50E-03 5.29E-04 -9.28E-05 2.34E-06 1.20E-06 -1.03E-07 S5 2.62E-03 -2.67E-03 8.23E-04 -2.43E-04 4.54E-05 -4.51E-06 1.81E-07 S6 -1.69E-02 1.40E-02 -7.93E-03 3.26E-03 -8.49E-04 1.25E-04 -7.69E-06 S7 -1.34E-02 1.70E-02 -1.36E-02 9.11E-03 -4.04E-03 1.02E-03 -1.09E-04 S8 1.14E-03 -3.28E-03 5.91E-03 -4.29E-03 2.14E-03 -5.81E-04 6.73E-05 S9 -9.35E-03 -1.24E-02 9.88E-03 -4.88E-03 1.83E-03 -4.33E-04 4.57E-05 S10 -9.89E-03 -1.51E-03 8.82E-04 8.99E-05 -1.27E-04 2.76E-05 -1.99E-06 S11 -1.87E-02 1.00E-02 -4.96E-03 1.74E-03 -3.84E-04 4.74E-05 -2.57E-06 S12 -1.93E-02 5.48E-03 -1.14E-03 2.00E-04 -1.61E-05 0.00E+00 0.00E+00 S13 -4.05E-02 2.40E-03 -3.00E-04 6.33E-05 -9.14E-06 7.34E-07 -2.30E-08 S14 -3.59E-02 4.11E-03 -3.61E-04 2.11E-05 -7.62E-07 1.26E-08 7.93E-12

[0110] Table 7

[0111] Table 8 shows the effective focal length f and the maximum semi-FOV of the optical imaging lens 2001.

[0112] parameter f(mm) Semi-FOV (°) numerical values 3.89 71.23

[0113] Table 8

[0114] like Figure 5A As shown, the optical imaging lens 2001 also includes four supporting members: a second supporting member P2, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6. The second supporting member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth supporting member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth supporting member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth supporting member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 9 shows the basic parameters of the supporting members of the optical imaging lens 2001, where all parameters are in millimeters (mm). These supporting members can block excess external light from entering, allowing for better support between the lens and the lens barrel, and enhancing the structural stability of the optical imaging lens 2001.

[0115] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 4.674 9.329 9.329 3.381 6.247 4.397 5.323 6.972 15.098 10.594 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 4.691 0.018 1.117 2.888 6.14 3.22 3.15 2.46 1.46 parameter DT42 L D4s d4m numerical values 1.66 13.459 6.247 3.3813

[0116] Table 9

[0117] Example 4

[0118] Figure 5B A schematic diagram of the optical imaging lens 2002 according to Embodiment 4 of this application is shown. For the sake of brevity, descriptions similar to those in Embodiment 3 will be omitted in this embodiment and the following embodiments.

[0119] like Figure 5BAs shown, the optical imaging lens 2002 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 2002 also includes an aperture stop STO (not shown) disposed between the third and fourth lens groups. The lens groups of the optical imaging lens 2002 are exactly the same as those of the optical imaging lens 2001 in Embodiment 3, and their basic parameters are detailed in Tables 6 to 8, and will not be repeated here.

[0120] like Figure 5B As shown, the optical imaging lens 2002 also includes four support members: a second support member P2, a fourth support member P4, a fifth support member P5, and a sixth support member P6. The second support member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth support member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth support member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth support member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 10 shows the basic parameters of the support members of the optical imaging lens 2002, where all parameters are in millimeters (mm). These support members can block excess external light from entering, allowing for better support between the lens and the lens barrel, and enhancing the structural stability of the optical imaging lens 2002.

[0121] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 4.774 9.569 9.569 3.476 6.447 4.497 5.423 6.972 15.098 10.594 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 4.691 0.018 1.087 2.988 6.14 3.22 3.15 2.46 1.46 parameter DT42 L D4s d4m numerical values 1.66 13.459 6.447 3.4756

[0122] Table 10

[0123] Figure 6A The on-axis chromatic aberration curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 6B The astigmatism curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The magnification chromatic aberration curves of the optical imaging lens 2001 of Embodiment 3 and the optical imaging lens 2002 of Embodiment 4 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to Figures 6A to 6C It can be seen that the optical imaging lens 2001 and optical imaging lens 2002 given in Embodiments 3 and 4 can achieve good imaging quality.

[0124] Example 5

[0125] Figure 7A A schematic diagram of the structure of an optical imaging lens 3001 according to Embodiment 5 of this application is shown. Figure 7AAs shown, the optical imaging lens 3001 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 3001 also includes an aperture stop STO (not shown) disposed between the third and fourth lens elements.

[0126] like Figure 7A As shown, the lens group of the optical imaging lens 3001, from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a seventh lens E7. The first lens E1 has an object-side surface S1 and an image-side surface S2. The second lens E2 has an object-side surface S3 and an image-side surface S4. The third lens E3 has an object-side surface S5 and an image-side surface S6. The fourth lens E4 has an object-side surface S7 and an image-side surface S8. The fifth lens E5 has an object-side surface S9 and an image-side surface S10. The sixth lens E6 has an object-side surface S11 and an image-side surface S12. The seventh lens E7 has an object-side surface S13 and an image-side surface S14. The filter E8 has an object-side surface S15 and an image-side surface S16. Light from the object passes sequentially through each surface S1 to S16 and is finally imaged onto the imaging surface S17 (not shown).

[0127] Table 11 shows the basic parameters of the lens group of the optical imaging lens 3001 in Embodiment 5, wherein the units of radius of curvature, thickness and effective focal length are millimeters (mm). Table 12 shows the higher-order coefficients that can be used for each aspherical mirror in Embodiment 5, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0128]

[0129] Table 11

[0130]

[0131]

[0132] Table 12

[0133] Table 13 shows the values ​​of the effective focal length f and the maximum semi-FOV of the optical imaging lens 3001.

[0134] parameter f(mm) Semi-FOV (°) numerical values 3.89 74.97

[0135] Table 13

[0136] like Figure 7AAs shown, the optical imaging lens 3001 also includes four supporting members: a second supporting member P2, a fourth supporting member P4, a fifth supporting member P5, and a sixth supporting member P6. The second supporting member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth supporting member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth supporting member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth supporting member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 14 shows the basic parameters of the supporting members of the optical imaging lens 3001, where all parameters are in millimeters (mm). These supporting members can block excess external light from entering, allowing for better support between the lens and the lens barrel, and enhancing the structural stability of the optical imaging lens 3001.

[0137] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 4.874 9.329 9.329 3.312 6.247 4.324 5.278 6.862 15.404 10.606 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 4.544 0.018 1.228 2.879 6.16 3.22 3.15 2.46 1.46 parameter DT42 L D4s d4m numerical values 1.65 13.459 6.247 3.3119

[0138] Table 14

[0139] Example 6

[0140] Figure 7B A schematic diagram of the optical imaging lens 3002 according to Embodiment 6 of this application is shown. For the sake of brevity, descriptions similar to those in Embodiment 7 will be omitted in this embodiment and the following embodiments.

[0141] like Figure 7B As shown, the optical imaging lens 3002 includes a lens barrel P0, lens groups E1 to E7, and a support assembly. The optical imaging lens 3002 also includes an aperture stop STO (not shown) disposed between the third and fourth lens groups. The lens groups of the optical imaging lens 3002 are exactly the same as those of the optical imaging lens 3001 in Embodiment 5, and their basic parameters are detailed in Tables 11 to 13, and will not be repeated here.

[0142] like Figure 7B As shown, the optical imaging lens 3002 also includes four support members: a second support member P2, a fourth support member P4, a fifth support member P5, and a sixth support member P6. The second support member P2 is positioned on the image side of the second lens and at least partially contacts the image side of the second lens; the fourth support member P4 is positioned on the image side of the fourth lens and at least partially contacts the image side of the fourth lens; the fifth support member P5 is positioned on the image side of the fifth lens and at least partially contacts the image side of the fifth lens; and the sixth support member P6 is positioned on the image side of the sixth lens and at least partially contacts the image side of the sixth lens. Table 15 shows the basic parameters of the support members of the optical imaging lens 3002, where all parameters are in millimeters (mm). These support members can block excess external light from entering, allowing for better support between the lens and the lens barrel, and enhancing the structural stability of the optical imaging lens 3002.

[0143] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m numerical values 4.934 9.629 9.629 3.369 6.547 4.384 5.338 6.862 15.404 10.906 parameter CP2 EP24 CP5 CP6 d0min DT11 DT12 DT21 DT22 DT41 numerical values 0.018 4.544 0.018 1.228 2.879 6.16 3.22 3.15 2.46 1.46 parameter DT42 L D4s d4m numerical values 1.65 13.459 6.547 3.3693

[0144] Table 15

[0145] Figure 8A The on-axis chromatic aberration curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, which indicate the deviation of the focal point of light of different wavelengths after passing through the lens. Figure 8B The astigmatism curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, which represent the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The magnification chromatic aberration curves of the optical imaging lens 3001 of Embodiment 5 and the optical imaging lens 3002 of Embodiment 6 are shown, representing the deviations in image height at different points on the imaging plane after light passes through the lens. According to... Figures 8A to 8C It can be seen that the optical imaging lens 3001 and optical imaging lens 3002 given in Embodiments 5 and 6 can achieve good imaging quality.

[0146] In summary, the optical imaging lenses of Examples 1 to 6 satisfy the relationships shown in Table 16.

[0147]

[0148]

[0149] Table 16

[0150] 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.

[0151] 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 lens barrel and the lens assembly and support assembly placed inside the lens barrel, wherein, The lens group comprises, along the optical axis from the object side to the image side, a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power. The first lens is a meniscus lens with its concave surface facing the image side. The refractive index N1 of the first lens is less than 1.55, and the effective half-aperture of its object side is larger than the effective half-aperture of all other lenses in the lens group. The object side of the third lens is concave, and the image side is convex. The object side of the fourth lens is convex, and the image side is convex. The object side of the fifth lens is concave, and the image side is concave. The object side of the sixth lens is convex, and the image side is convex. The object side of the seventh lens is convex, and the image side is concave. The optical imaging lens has seven lenses with optical power. The support assembly includes: a second support member disposed on the image side of the second lens and in at least partial contact with the image side surface of the second lens, and a fourth support member disposed on the image side of the fourth lens and in at least partial contact with the image side surface of the fourth lens; The effective focal length f of the optical imaging lens and the maximum semi-field of view (Semi-FOV) of the optical imaging lens satisfy the following: 1.04mm ≤ f / tan(Semi-FOV) ≤ 1.32mm; The center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the center thickness CT3 of the third lens on the optical axis, and the maximum height L of the lens barrel along the optical axis satisfy: 2.73 ≤ L / (CT1+CT2+CT3) ≤ 2.80; and The inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D2s of the object-side side face of the second support member, and the refractive index N1 of the first lens satisfy the following condition: 2.39≤d0s / D2s×N1≤2.

65.

2. The optical imaging lens according to claim 1, characterized in that, The outer diameter D2m of the image side of the second support member, the outer diameter D4s of the object side of the fourth support member, and the center thickness CT4 of the fourth lens on the optical axis satisfy: 1.09≤(D2m-D4s) / CT4≤1.

94.

3. The optical imaging lens according to claim 1, characterized in that, The effective half-aperture DT11 of the object side of the first lens and the effective half-aperture DT21 of the object side of the second lens satisfy the following condition: 2.99mm≤DT11-DT21≤3.40mm.

4. The optical imaging lens according to claim 1, characterized in that, The center thickness CT3 of the third lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second and third lenses on the optical axis, and the maximum thickness CP2 of the second support member along the optical axis satisfy the following: 32.46≤CT3 / CT2+T23 / CP2≤33.

92.

5. The optical imaging lens according to claim 3, characterized in that, The radius of curvature R2 of the image-side surface of the first lens, the center thickness CT1 of the first lens on the optical axis, and the refractive index N1 of the first lens satisfy: 2.08 ≤ (R2 / CT1) / N1 ≤ 2.56; and The inner diameter d2s of the object side of the second support member, the maximum thickness CP2 of the second support member along the optical axis, and the Abbe number V2 of the second lens satisfy: 10.45≤d2s / CP2 / V2≤15.

26.

6. The optical imaging lens according to claim 1, characterized in that, The support assembly further includes a fifth support member disposed on the image side of the fifth lens and in at least partial contact with the image side surface of the fifth lens; The radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the inner diameter d4s of the object side surface of the fourth support member, and the inner diameter d5s of the object side surface of the fifth support member satisfy the following: -7.41≤(R9+R10) / (d5s-d4s)≤-3.

07.

7. The optical imaging lens according to claim 1, characterized in that, The effective focal length f4 of the fourth lens, the refractive index N4 of the fourth lens, and the inner diameter d4m of the image side of the fourth support member satisfy the following condition: 0.85≤f4 / N4 / d4m≤0.

94.

8. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens further includes a sixth support member disposed on the image side of the sixth lens and in at least partial contact with the image side of the sixth lens.

9. The optical imaging lens according to claim 7, characterized in that, The effective half-aperture of the object side of the fourth lens is smaller than the effective half-aperture of all other lenses in the lens group; and The inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D4m of the image-side face of the fourth support member, the effective half-aperture DT11 of the object-side face of the first lens, and the effective half-aperture DT41 of the object-side face of the fourth lens satisfy the following: 1.78≤(d0s-D4m) / (DT11-DT41)≤1.

95.

10. The optical imaging lens according to claim 8, characterized in that, The maximum thickness CP6 of the sixth bearing member along the optical axis and the center thickness CT6 of the sixth lens on the optical axis satisfy the following condition: 1.06≤CP6 / CT6≤1.

34.

11. The optical imaging lens according to claim 1, characterized in that, The distance TD between the object side of the first lens and the image side of the seventh lens on the optical axis, the inner diameter d0m of the image side end face of the lens barrel and the inner diameter d0s of the object side end face of the lens barrel satisfy: -3.02≤TD / (d0m-d0s)≤-2.

73.

12. The optical imaging lens according to claim 1, characterized in that, The distance TD from the object side of the first lens to the image side of the seventh lens along the optical axis, and the distance EP24 from the image side of the second support member to the object side of the fourth support member along the optical axis, satisfy: 2.34≤TD / EP24≤2.

96.

13. The optical imaging lens according to claim 1, characterized in that, The seventh lens has at least one inflection point on its object side or image side; The inner diameter d0m of the image-side end face of the lens barrel, the effective focal length f7 of the seventh lens, the radius of curvature R13 of the object-side surface of the seventh lens, and the radius of curvature R14 of the image-side surface of the seventh lens satisfy the following: -3.54mm≤d0m / (f7 / (R13+R14))≤-1.14mm.

14. The optical imaging lens according to claim 1, characterized in that, The effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the outer diameter D2s of the object side of the second support member and the inner diameter d2s of the object side of the second support member satisfy: 1.07≤(f2 / f3) / (D2s / d2s)≤3.

15.

15. The optical imaging lens according to claim 1, characterized in that, The optical imaging lens further includes a fifth support member disposed on the image side of the fifth lens and in at least partial contact with the image side surface of the fifth lens, and a sixth support member disposed on the image side of the sixth lens and in at least partial contact with the image side surface of the sixth lens; as well as The maximum thickness CP6 of the sixth support member along the optical axis, the maximum thickness CP5 of the fifth support member along the optical axis, the air gap T67 between the sixth lens and the seventh lens on the optical axis, and the air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy: 70.05≤(CP6 / CP5)+(T67 / T56)≤79.

11.

16. The optical imaging lens according to any one of claims 1-15, characterized in that, The minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is less than 3.1 mm.

17. The optical imaging lens according to any one of claims 1-15, characterized in that, The minimum aperture d0smin of the lens barrel in the direction perpendicular to the optical axis is located between the third lens and the fourth lens.

Images