Optical imaging lens

Abstract

The invention discloses an optical imaging lens, which comprises a lens cone, and a lens group and a bearing piece group which are arranged in the lens cone, the lens group comprises 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 has negative focal power, the second lens has positive focal power, and the bearing piece group is arranged in the lens cone. The third lens has positive focal power, the fourth lens has positive focal power, the fifth lens has negative focal power, the sixth lens has positive focal power, and the seventh lens has negative focal power; the bearing piece set comprises a fourth bearing piece and a fifth bearing piece. The effective semi-aperture of the object side surface of the fourth lens is smaller than the effective semi-apertures of 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 bearing piece, 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 meet the following conditions: 1.6 lt; (d0s-D4m) / (DT11-DT41) lt; 2.1); 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.

Description

[0001] Divisional Application Statement

[0002] This application is a divisional application of the Chinese invention patent application filed on November 7, 2023 with the invention name “Optical Imaging Lens” and application number 202311471506.6. Technical Field

[0003] The present application relates to the field of optical elements, and in particular, to an optical imaging lens. Background Art

[0004] With the development of today's VR / AR industry, optical lenses are widely used in scenes such as video recording, space recognition and positioning; and with the continuous innovation of technology and upgrading of functions of consumer electronic products such as mobile phones / tablets / drones, people's requirements for lens functions and imaging quality are getting higher and higher.

[0005] For ultra-wide-angle lenses, the radial dimension of the first lens is usually large, and the front lens occupies most of the space inside the entire lens barrel, which will cause the pressure on the lens to be concentrated at the rear end after assembly, thereby affecting the assembly stability. Therefore, how to reasonably design the distribution of lenses and supporting parts while ensuring the imaging quality of ultra-wide-angle lenses and improve the assembly stability of ultra-wide-angle lenses has always been one of the research directions of current technicians in this field. Summary of the invention

[0006] The first aspect of the present application provides an optical imaging lens, which includes: a lens barrel, and 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. Among them, 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 surface is greater than the effective semi-apertures of the other lenses within the lens group; the object side surface of the third lens is concave, and the image side surface is convex; the object side surface of the fourth lens is convex, and the image side surface is convex; the object side surface of the fifth lens is concave, and the image side surface is concave; the object side surface of the sixth lens is convex, and the image side surface is convex; and the object side surface of the seventh lens is convex, and the image side surface is concave; the support member group includes: a second support member disposed on the image side of the second lens and at least partially in contact with the image side surface of the second lens, and a fourth support member disposed on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens; the 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; and the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D2s of the object side surface of the second support member and the refractive index N1 of the first lens satisfy: 2.2 < d0s / D2s × N1 < 2.8.

[0007] The second aspect of the present application provides an optical imaging lens, which includes: a lens barrel, and a lens group and a supporting member group placed in the lens barrel, wherein the lens group includes, in order 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 with negative optical power facing the image side, the second lens has positive optical power, the third lens has positive optical power, the object side surface thereof is concave, and the image side surface is convex, the fourth lens has positive optical power, the object side surface thereof is convex, and the image side surface is convex, the fifth lens has negative optical power, the object side surface thereof is concave, and the image side surface is concave, and the sixth lens has negative optical power, the object side surface thereof is concave, and the image side surface is concave, and the The lens has positive optical power, its object side surface is convex, and its image side surface is convex, and the seventh lens has negative optical power, its object side surface is convex, and its image side surface is concave; the supporting member group includes: a fourth supporting member placed on the image side of the fourth lens and in at least partial contact with the image side surface of the fourth lens; wherein the effective semi-diameter of the object side surface of the fourth lens is smaller than the effective semi-diameter of each other lens in the lens group; the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth supporting member, the effective semi-diameter DT11 of the object side surface of the first lens and the effective semi-diameter DT41 of the object side surface of the fourth lens satisfy: 1.6<(d0s-D4m) / (DT11-DT41)<2.1.

[0008] In one embodiment, the outer diameter D2m of the image side surface of the second supporting member, the outer diameter D4s of the object side surface of the fourth supporting member and the center thickness CT4 of the fourth lens on the optical axis satisfy: 0.9<(D2m-D4s) / CT4<2.1.

[0009] In one embodiment, the effective half-diameter DT11 of the object side surface of the first lens and the effective half-diameter DT21 of the object side surface of the second lens satisfy: 2.5 mm <DT11-DT21<5mm。

[0010] 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 lens and the third lens on the optical axis, and the maximum thickness CP2 of the second supporting member along the optical axis satisfy: 32.0 <CT3 / CT2+T23 / CP2<34.0。

[0011] 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 on 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 supporting member, the maximum thickness CP2 of the second supporting member along the optical axis, and the Abbe number V2 of the second lens satisfy: 10.0 <d2s / CP2 / V2<15.5。

[0012] In one embodiment, the supporting member group also includes a fifth supporting member placed on the image side of the fifth lens and in at least partial contact with the image side surface of the fifth lens; the curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the inner diameter d4s of the object side surface of the fourth supporting member and the inner diameter d5s of the object side surface of the fifth supporting member satisfy: -7.2<(R9+R10) / (d5s-d4s)<-2.8.

[0013] 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 supporting member satisfy: 0.6 <f4 / N4 / d4m<1.0。

[0014] In one embodiment, the optical imaging lens further includes a sixth supporting 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; the inner diameter d6m of the image side surface of the sixth supporting member, the inner diameter d6s of the object side surface of the sixth supporting member, the effective focal length f6 of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy: 0.6<(d6m-d6s) / (f6 / R12)<1.0.

[0015] In one embodiment, the effective semi-aperture of the object side surface of the fourth lens is smaller than the effective semi-aperture of each other lens in the lens group; and the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth supporting member, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 1.6<(d0s-D4m) / (DT11-DT41)<2.1.

[0016] In one embodiment, the maximum thickness CP6 of the sixth supporting 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.

[0017] In one embodiment, the distance TD from the object side of the first lens to the image side of the seventh lens on the optical axis, the inner diameter d0m of the image side end surface of the lens barrel, and the inner diameter d0s of the object side end surface of the lens barrel satisfy: -3.2 <TD / (d0m-d0s)<-2.5。

[0018] In one embodiment, the distance TD from the object side of the first lens to the image side of the seventh lens on the optical axis, and the distance EP24 from the image side of the second supporting member to the object side of the fourth supporting member along the optical axis direction satisfy: 2.0 <TD / EP24<3.1。

[0019] In one embodiment, the object side surface or the image side surface of the seventh lens has at least one inflection point; the inner diameter d0m of the image side end surface of the lens barrel, the effective focal length f7 of the seventh lens, the curvature radius R13 of the object side surface of the seventh lens, and the curvature radius R14 of the image side surface of the seventh lens satisfy: -3.8 <d0m / (f7 / (R13+R14))<-1.5。

[0020] 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 supporting member, and the inner diameter d2s of the object side of the second supporting member satisfy: 0.8<(f2 / f3) / (D2s / d2s)<3.5.

[0021] In one embodiment, the maximum thickness CP6 of the sixth supporting member along the optical axis, the maximum thickness CP5 of the fifth supporting 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: 69.5<(CP6 / CP5)+(T67 / T56)<80.

[0022] In one embodiment, the minimum aperture d0smin of the lens barrel in a direction perpendicular to the optical axis is less than 3.1 mm.

[0023] In one embodiment, the minimum aperture d0smin of the lens barrel in a direction perpendicular to the optical axis is located between the third lens and the fourth lens.

[0024] The present application provides a seven-piece ultra-wide-angle lens. Through a reasonable combination of positive and negative optical powers and surface profiles, it is beneficial to control the light path, achieving the characteristics of ultra-wide angle and high resolution, better meeting the requirements of industrial applications, and satisfying 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 beneficial for better realizing the ultra-wide-angle characteristic and shortening 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, thereby 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, preventing the lens center of gravity from shifting. 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 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 for 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

[0025] Other features, objects, and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 Shows the structural layout diagram and schematic diagram of some parameters of an optical imaging lens according to the present application;

[0027] FIG. 2A to FIG. 2C Shows the schematic diagram of the deformation displacement under pressure of the optical imaging lens according to the present application in three cases;

[0028] Figure 3A Shows the structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application;

[0029] Figure 3B Shows the structural schematic diagram of the optical imaging lens according to Embodiment 2 of the present application;

[0030] FIG. 4A to FIG. 4C Respectively show the axial chromatic aberration curve, astigmatism curve, and lateral chromatic aberration curve of the optical imaging lens according to Embodiment 1 and Embodiment 2 of the present application;

[0031] Figure 5A Shows the structural schematic diagram of the optical imaging lens according to Embodiment 3 of the present application;

[0032] Figure 5B A schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application is shown;

[0033] FIG. 6A to FIG. 6C The axial chromatic aberration curve, the astigmatism curve, and the magnification chromatic aberration curve of the optical imaging lens according to Example 3 and Example 4 of the present application are respectively shown;

[0034] Fig. 7A A schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application is shown;

[0035] Figure 7B A schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application is shown; and

[0036] FIG. 8A to FIG. 8C The axial chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve of the optical imaging lens according to Example 5 and Example 6 of the present application are respectively shown. DETAILED DESCRIPTION

[0037] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0039] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0040] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the object is called the object side of the lens, and the surface of each lens close to the imaging surface is called the image side of the lens.

[0041] It should also be understood that the terms "comprises", "including", "having", "includes" 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0042] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. For example, the lens group, lens barrel and supporting member in each embodiment of the present application can be combined arbitrarily, and are not limited to the lens group in one embodiment can only be combined with the lens barrel, supporting member, etc. of the embodiment.

[0044] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Figure 1 The structure arrangement diagram of an optical imaging lens according to the present application and a schematic diagram of some parameters are shown. Those skilled in the art should understand that some parameters of lenses commonly used in the art (such as the center thickness CT1 of the first lens on the optical axis) are not shown in the figure. Figure 1 It is shown in Figure 1 Only some parameters of the lens barrel and the supporting member of an optical imaging lens of the present application are shown as examples to facilitate a better understanding of the present invention. Figure 1As shown, CP2 is the maximum thickness of the second supporting member along the optical axis, CP5 is the maximum thickness of the fifth supporting member along the optical axis, CP6 is the maximum thickness of the sixth supporting member along the optical axis, EP24 is the distance from the image side surface of the second supporting member to the object side surface of the fourth supporting member along the optical axis, d0smin is the minimum aperture of the lens barrel in the direction perpendicular to the optical axis, d2s is the inner diameter of the object side surface of the second supporting member, D2s is the outer diameter of the object side surface of the second supporting member, D2m is the outer diameter of the image side surface of the second supporting member, d0s is the inner diameter of the object side end surface of the lens barrel, d4s is the inner diameter of the object side surface of the fourth supporting member, d5s is the inner diameter of the object side surface of the fifth supporting member, d6s is the inner diameter of the object side surface of the sixth supporting member, D4m is the outer diameter of the image side surface of the fourth supporting member, d6m is the inner diameter of the image side surface of the sixth supporting member, and d0m is the inner diameter of the image side end surface of the lens barrel.

[0045] The optical imaging lens according to the exemplary embodiment of the present application includes a lens barrel and a lens group and a supporting member group arranged in the lens barrel. The lens group 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 in order from the object side to the image side along the optical axis. The first lens is a meniscus lens facing the image side, 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 present application is conducive to controlling the trend of light through reasonable matching of positive and negative optical focus and surface shape, realizing the characteristics of ultra-wide angle, large image surface and high resolution, and can better meet the application needs of the industry. 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 semi-diameter of the object side surface thereof is larger than the effective semi-diameter of other lenses in the lens group.

[0046] 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.

[0047] 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.

[0048] 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 semi - field angle of the optical imaging lens.

[0049] In an exemplary embodiment, the maximum semi - field angle Semi - FOV of the optical imaging lens according to the present application may be in the range of 70° to 75°.

[0050] 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.

[0051] 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.

[0052] 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 can 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 larger than the effective semi-apertures of the 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 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, thereby 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 in the present application, the volume and spatial distribution of the front 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 positions 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.

[0053] By controlling 2.6 < L / (CT1 + CT2 + CT3) < 3.0 and 2.2 < d0s / D2s × N1 < 2.8 within the said range in the present application, 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.

[0054] The following combines FIG. 2A to FIG. 2C , and further illustrates the role of the technical solution of the present application in improving the overall assembly stability of the lens. FIG. 2A to FIG. 2C FIG. shows the schematic diagrams of the deformation displacement under pressure of the optical imaging lens according to the present application in three cases when Semi-FOV = 72°, which can intuitively show the possible deformation displacement of the lens assembly 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 larger the displacement of the lens and the greater the deformation pressure it bears.

[0055] Figure 2AThis is a diagram of deformation displacement when the optical imaging lens satisfies d0s / D2s×N1=1.5 and (D2m-D4s) / CT4=0.5. Figure 2A The colors of the first to sixth lenses are lighter, and the color of the seventh lens is darker. This means that when the values ​​of d0s / D2s×N1 and (D2m-D4s) / CT4 are both smaller than the control range of the present application, the displacement of the seventh lens is significantly greater than that of other lenses. In other words, the pressure is concentrated on the seventh lens at the rear end of the lens, which will result in poor overall assembly stability.

[0056] Figure 2B This is a diagram of deformation displacement when the optical imaging lens satisfies d0s / D2s×N1=2.5 and (D2m-D4s) / CT4=1.5. Figure 2B The color of each lens is lighter and more uniform, which means 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 smaller and the pressure distribution is more 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 lens, the second lens, and the third lens is increased, and the overall assembly stability of the lens is improved.

[0057] Figure 2C This is a diagram of deformation displacement when the optical imaging lens satisfies d0s / D2s×N1=3.0 and (D2m-D4s) / CT4=3.0. Figure 2C The color distribution of each lens is uneven, and the colors of the first lens and the second lens are darker. This indicates that when the values ​​of d0s / D2s×N1 and (D2m-D4s) / CT4 are greater than the control range of this application, the compressive deformation displacement of the first lens and the second lens is large, the pressure on the front of the lens is concentrated, and the overall assembly stability is poor.

[0058] The optical imaging lens according to the exemplary embodiment of the present application is a seven-piece ultra-wide-angle large-image-surface lens, and the optical imaging lens comprises: a lens barrel, and a lens group and a supporting member group disposed in the lens barrel, wherein the lens group comprises, in order 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 with negative optical power facing the image side, the second lens has positive optical power, and the third lens has positive optical power, and its object side is The fourth lens has a positive focal power, its object side is convex, and its image side is convex, the fifth lens has a negative focal power, its object side is concave, and its image side is concave, the sixth lens has a positive focal power, its object side is convex, and its image side is convex, and the seventh lens has a negative focal power, its object side is convex, and its image side is concave; the supporting member group includes: a fourth supporting member disposed on the image side of the fourth lens and in at least partial contact with the image side of the fourth lens; wherein the effective half of the object side of the fourth lens is The aperture is smaller than the effective semi-aperture of 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 supporting member, the effective semi-aperture DT11 of the object side face of the first lens and the effective semi-aperture DT41 of the object side face of the fourth lens satisfy: 1.6<(d0s-D4m) / (DT11-DT41)<2.1. Through the reasonable combination of positive and negative focal lengths and surface shapes and the large radial size of the first lens, it is beneficial to achieve the characteristics of ultra-wide angles. However, if the effective semi-aperture of the object side face of the first lens is too large, it will affect the support between lenses and the molding of the lenses. In the present application, 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 supporting member to the difference between the effective semi-apertures of the first lens and the fourth lens is controlled within a reasonable range, which can effectively control the maximum radial segment difference of the lens, reasonably allocate the overall radial size of other lenses, avoid the problem that the lens structure area is too short to affect the effective diameter area, or the structure areas of other lenses are too long in order to match the height of the first lens, resulting in greater difficulty in lens molding.

[0059] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.9<(D2m-D4s) / CT4<2.1, wherein D2m is the outer diameter of the image side surface of the second supporting member, D4s is the outer diameter of the object side surface of the fourth supporting member, and CT4 is the center thickness of the fourth lens on the optical axis. Satisfying 0.9<(D2m-D4s) / CT4<2.1 can ensure that the radial step difference from the second lens to the fourth lens is within a reasonable range and the center strength of the fourth lens is ensured. Control of the front and middle positions of the lens can reduce the pressure on the rear of the lens, increase the supporting stability of the first lens, the second lens, and the third lens, improve the overall assembly stability of the lens, and ensure that the center of gravity of the lens structure will not shift.

[0060] In an exemplary embodiment, the optical imaging lens according to the present application can satisfy: 2.5 mm < DT11 - DT21 < 5 mm, where DT11 is the effective semi-aperture of the object side of the first lens, and DT21 is the effective semi-aperture of the object side 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 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.

[0061] In an exemplary embodiment, the optical imaging lens according to the present application can 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 < 34.0, it is beneficial to reduce the sensitivity of the second lens and the third lens to the gap and improve the MTF yield.

[0062] In an exemplary embodiment, the optical imaging lens according to the present application can 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 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 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 / V2 < 15.5, 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, the processing formability of the first lens and the aperture range of the second support member are ensured, which can effectively prevent excessive light rays from entering the third lens and effectively reduce the occurrence of stray light.

[0063] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -7.2 < (R9 + R10) / (d5s - d4s) < -2.8, where 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, d4s is the inner diameter of the object side of the fourth support member, and d5s is the inner diameter of the object side of the fifth support member. By controlling the radii of curvature of the object side and the image side 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.

[0064] In an exemplary embodiment, the optical imaging lens according to the present application may 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 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 is possible to 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 path of light within the optical imaging lens, isolating the emission of excess stray light rays.

[0065] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.6 < (d6m - d6s) / (f6 / R12) < 1.0, where d6m is the inner diameter of the image side of the sixth support member, d6s is the inner diameter of the object side 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 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 within a suitable range can control the refraction of light by the sixth lens. Combining the settings of the inner diameters of the object side and the image side of the sixth support member is beneficial to the assembly stability of the front and rear lenses in this space and effectively blocks the light at the edge, reducing the influence of stray light.

[0066] In an exemplary embodiment, the effective semi-aperture of the object side surface 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 surface of the lens barrel, D4m is the outer diameter of the image side surface of the fourth bearing member, DT11 is the effective semi-aperture of the object side surface of the first lens, and DT41 is the effective semi-aperture of the object side surface of the fourth lens. Satisfying 1.6 < (d0s - D4m) / (DT11 - DT41) < 2.1 and controlling the ratio of the difference between the inner diameter of the object side surface of the lens barrel and the outer diameter of the image side surface 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.

[0067] 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 and controlling the ratio of the thickness of the sixth bearing member to the central thickness of the sixth lens within this range can effectively ensure the assembly stability of the last two lenses when the segment difference between the sixth lens and the seventh lens is large through the setting of the bearing member.

[0068] 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 surface of the first lens to the image side surface of the seventh lens, d0m is the inner diameter of the image side end surface of the lens barrel, and d0s is the inner diameter of the object side end surface 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 installation" structure, this conditional formula can also control the inner diameters of the object side end surface and the image side end surface of the lens barrel, enable effective light to pass through, and ensure that the overall size of the lens is not too large.

[0069] 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 bearing member to the object side surface of the fourth bearing member. Satisfying 2.0 < TD / EP24 < 3.1 is conducive to reasonably allocating the internal space of the lens barrel while controlling the total length of the optical imaging lens by controlling the ratio of the total length of the optical imaging lens to the distance from the image side surface of the second bearing member to the object side surface of the fourth bearing member.

[0070] In an exemplary embodiment, at least one inflection point is provided 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 to ensure the rationality of the lens surface shape, which is conducive to the mold processing type and forming stability of the seventh lens.

[0071] 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 bearing member, and d2s is the inner diameter of the object side surface of the second bearing 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 curvatures 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 bearing member can be reasonably controlled to ensure the possibility of eliminating internal stray light penetrating the second lens and the third lens by the second bearing member.

[0072] In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 69.5<(CP6 / CP5)+(T67 / T56)<80, wherein CP6 is the maximum thickness of the sixth supporting member along the optical axis, CP5 is the maximum thickness of the fifth supporting member along the optical axis, T67 is the air gap between the sixth lens and the seventh lens on the optical axis, and T56 is the air gap between the fifth lens and the sixth lens on the optical axis. Satisfying 69.5<(CP6 / CP5)+(T67 / T56)<80 ensures the thickness of the fifth supporting member and the sixth supporting member, indirectly ensures the range of the edge thickness of the sixth lens, is beneficial to the processing technology of the sixth lens, and at the same time controls the thickness of the air gap and the supporting member, is beneficial to the formability of the supporting member and ensures the stability of the overall rear end lens group structure.

[0073] In an exemplary embodiment, the minimum aperture d0smin of the lens barrel in a direction perpendicular to the optical axis is less than 3.1 mm. This setting is beneficial for constraining the aperture size of the diaphragm of such an ultra-wide-angle lens, which can have a decisive influence on the structural shape of the overall optical system to a certain extent, while affecting the minimum molding size of the lens barrel.

[0074] In an exemplary embodiment, the minimum aperture d0smin of the lens barrel in a direction perpendicular to the optical axis is located between the third lens and the fourth lens, that is, the aperture of the portion of the inner wall of the lens barrel between the third lens and the fourth lens is the smallest. The aperture is placed between the third lens and the fourth lens, which ensures the required imaging magnification, reasonably ensures the image height range of the full field of view, and improves the imaging quality of the off-axis point.

[0075] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side and image side of all lenses from the first lens to the seventh lens are aspherical mirror surfaces.

[0076] In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0077] The optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the optical power, surface shape and arrangement of each supporting member of each lens, the span of each gear of the lens and the lens barrel is made more uniform, the ability of light convergence is enhanced, and the imaging quality of the ultra-wide-angle and large-image optical imaging lens is improved. However, it should be understood by those skilled in the art that the number of lenses constituting the optical imaging lens can be changed without departing from the technical solution claimed for protection in the present application to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the optical imaging lens is not limited to including seven lenses. If necessary, the optical imaging lens may also include other numbers of lenses.

[0078] The following further describes specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings. FIG. 3A to FIG. 4C Describe the optical imaging lenses 1001 and 1002 according to Embodiments 1 and 2 of the present application; refer to FIG. 5A to FIG. 6C Describe the optical imaging lenses 2001 and 2002 according to Embodiments 3 and 4 of the present application; refer to 7A to 8C Optical imaging lenses 3001 and 3002 according to Embodiments 5 and 6 of the present application are described.

[0079] Example 1

[0080] Figure 3A FIG. 1 shows a schematic structural diagram of an optical imaging lens 1001 according to Embodiment 1 of the present application. Figure 3A As shown, the optical imaging lens 1001 includes a lens barrel P0, lens groups E1-E7 and a supporting member group. The optical imaging lens 1001 also includes a stop STO (not shown) disposed between the third lens and the fourth lens.

[0081] like Figure 3A As shown, the lens group of the optical imaging lens 1001 includes, 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, 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 through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0082] Table 1 shows a basic parameter table of the lens group of the optical imaging lens 1001 of Example 1, wherein the units of the curvature radius, thickness and effective focal length are all millimeters (mm).

[0083]

[0084] Table 1

[0085] In Example 1, the object side surface and the image side surface of any one of the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0086]

[0087] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the high-order coefficients A of the aspheric mirror surfaces S1-S14 that can be used in Example 1 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 .

[0088]

[0089]

[0090] Table 2

[0091] Table 3 shows the values ​​of the effective focal length f and the maximum half field of view Semi-FOV of the optical imaging lens 1001.

[0092] parameter f(mm) Semi-FOV(°) Numeric 3.88 71.24

[0093] Table 3

[0094] like Figure 3AAs shown, the optical imaging lens 1001 also includes four supporting members, namely the second supporting member P2, the fourth supporting member P4, the fifth supporting member P5 and the sixth supporting member P6. The second supporting member P2 is placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 4 shows a basic parameter table of the supporting members of the optical imaging lens 1001, and the units of each parameter in Table 4 are millimeters (mm). The above-mentioned supporting members can block the entry of extra external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1001 is enhanced.

[0095] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.98 14.881 6.334 3.9198

[0096] Table 4

[0097] Example 2

[0098] Figure 3B The structure diagram of the optical imaging lens 1002 according to Embodiment 2 of the present application is shown. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0099] like Figure 3B As shown, the optical imaging lens 1002 includes a lens barrel P0, lens groups E1 to E7, and a supporting member group. The optical imaging lens 1002 also includes an aperture STO (not shown) disposed between the third lens and the fourth lens. The lens group of the optical imaging lens 1002 is completely the same as the lens group of the optical imaging lens 1001 of Example 1. The basic parameters thereof are detailed in Tables 1 to 3, and will not be described in detail.

[0100] like Figure 3B As shown, the optical imaging lens 1002 also includes four supporting members, namely, 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 placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 5 shows a basic parameter table of the supporting members of the optical imaging lens 1002, and the units of each parameter in Table 5 are millimeters (mm). The above-mentioned supporting members can block the entry of excess external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 1002 is enhanced.

[0101] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.98 14.881 6.950 3.9198

[0102] Table 5

[0103] Figure 4A The axial chromatic aberration curves of the optical imaging lens 1001 of Example 1 and the optical imaging lens 1002 of Example 2 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 4B Astigmatism curves of the optical imaging lens 1001 of Example 1 and the optical imaging lens 1002 of Example 2 are shown, which represent meridional image curvature and sagittal image curvature. Figure 4C The magnification chromatic aberration curves of the optical imaging lens 1001 of Example 1 and the optical imaging lens 1002 of Example 2 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 4A to FIG. 4C It can be seen that the optical imaging lens 1001 and the optical imaging lens 1002 provided in Embodiment 1 and Embodiment 2 can achieve good imaging quality.

[0104] Example 3

[0105] Figure 5A FIG. 2 shows a schematic structural diagram of an optical imaging lens 2001 according to Embodiment 3 of the present application. Figure 5A As shown, the optical imaging lens 2001 includes a lens barrel P0, lens groups E1-E7 and a supporting member group. The optical imaging lens 2001 also includes a stop STO (not shown) disposed between the third lens and the fourth lens.

[0106] like Figure 5A As shown, the lens group of the optical imaging lens 2001 includes, 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, 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 through the surfaces S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0107] Table 6 shows the basic parameters of the lens group of the optical imaging lens 2001 of Example 3, wherein the units of the radius of curvature, thickness and effective focal length are all in millimeters (mm). Table 7 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0108]

[0109]

[0110] Table 6

[0111] 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

[0112] Table 7

[0113] Table 8 shows the values ​​of the effective focal length f and the maximum half field of view Semi-FOV of the optical imaging lens 2001.

[0114] parameter f(mm) Semi-FOV(°) Numeric 3.89 71.23

[0115] Table 8

[0116] like Figure 5A As shown, the optical imaging lens 2001 also includes four supporting members, namely the second supporting member P2, the fourth supporting member P4, the fifth supporting member P5 and the sixth supporting member P6. The second supporting member P2 is placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 9 shows a basic parameter table of the supporting members of the optical imaging lens 2001, and the units of each parameter in Table 9 are millimeters (mm). The above-mentioned supporting members can block the entry of extra external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2001 is enhanced.

[0117] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.66 13.459 6.247 3.3813

[0118] Table 9

[0119] Example 4

[0120] Figure 5B The structure diagram of the optical imaging lens 2002 according to Embodiment 4 of the present application is shown. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 3 will be omitted.

[0121] like Figure 5BAs shown, the optical imaging lens 2002 includes a lens barrel P0, lens groups E1 to E7, and a supporting member group. The optical imaging lens 2002 also includes a stop STO (not shown) disposed between the third lens and the fourth lens. The lens group of the optical imaging lens 2002 is completely the same as the lens group of the optical imaging lens 2001 of Example 3. The basic parameters thereof are detailed in Tables 6 to 8, and will not be described in detail.

[0122] like Figure 5B As shown, the optical imaging lens 2002 also includes four supporting members, namely the second supporting member P2, the fourth supporting member P4, the fifth supporting member P5 and the sixth supporting member P6. The second supporting member P2 is placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 10 shows a basic parameter table of the supporting members of the optical imaging lens 2002, and the units of each parameter in Table 10 are all millimeters (mm). The above-mentioned supporting members can block the entry of extra external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 2002 is enhanced.

[0123] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.66 13.459 6.447 3.4756

[0124] Table 10

[0125] Fig. 6A The axial chromatic aberration curves of the optical imaging lens 2001 of Example 3 and the optical imaging lens 2002 of Example 4 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 6B Astigmatism curves of the optical imaging lens 2001 of Example 3 and the optical imaging lens 2002 of Example 4 are shown, which represent meridional image curvature and sagittal image curvature. Figure 6C The magnification chromatic aberration curves of the optical imaging lens 2001 of Example 3 and the optical imaging lens 2002 of Example 4 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6C It can be seen that the optical imaging lens 2001 and the optical imaging lens 2002 provided in Example 3 and Example 4 can achieve good imaging quality.

[0126] Example 5

[0127] Fig. 7A FIG. 3 shows a schematic structural diagram of an optical imaging lens 3001 according to Embodiment 5 of the present application. Fig. 7AAs shown, the optical imaging lens 3001 includes a lens barrel P0, lens groups E1-E7 and a supporting member group. The optical imaging lens 3001 also includes a stop STO (not shown) disposed between the third lens and the fourth lens.

[0128] like Fig. 7A As shown, the lens group of the optical imaging lens 3001 includes, 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, 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 through each surface S1 to S16 in sequence and is finally imaged on an imaging surface S17 (not shown).

[0129] Table 11 shows the basic parameters of the lens group of the optical imaging lens 3001 of Example 5, wherein the units of the radius of curvature, thickness and effective focal length are all in millimeters (mm). Table 12 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the above Example 1.

[0130]

[0131]

[0132] Table 11

[0133] Face number A4 A6 A8 A10 A12 A14 A16 S1 -6.06E-04 1.24E-04 -8.36E-06 3.38E-07 -8.15E-09 1.09E-10 -6.21E-13 S2 -4.59E-03 9.06E-04 -2.68E-04 5.62E-05 -7.24E-06 4.96E-07 -1.40E-08 S3 8.14E-03 -1.52E-03 2.23E-04 -3.36E-05 2.57E-06 -6.88E-08 0.00E+00 S4 1.49E-02 -2.39E-03 5.11E-04 -8.29E-05 4.02E-07 1.24E-06 -9.26E-08 S5 2.03E-03 -2.44E-03 7.56E-04 -2.21E-04 4.02E-05 -3.79E-06 1.44E-07 S6 -1.59E-02 1.19E-02 -6.10E-03 2.37E-03 -5.87E-04 8.19E-05 -4.61E-06 S7 -1.23E-02 1.49E-02 -1.16E-02 8.09E-03 -3.71E-03 9.61E-04 -1.05E-04 S8 8.51E-04 -4.14E-03 6.41E-03 -4.38E-03 2.12E-03 -5.65E-04 6.54E-05 S9 -7.67E-03 -1.58E-02 1.20E-02 -5.57E-03 1.89E-03 -4.07E-04 4.03E-05 S10 -8.33E-03 -4.65E-03 3.25E-03 -9.27E-04 1.25E-04 -6.11E-06 -1.31E-07 S11 -1.85E-02 9.01E-03 -4.33E-03 1.53E-03 -3.50E-04 4.47E-05 -2.52E-06 S12 -1.82E-02 4.99E-03 -1.02E-03 1.84E-04 -1.55E-05 0.00E+00 0.00E+00 S13 -4.24E-02 2.61E-03 -3.12E-04 6.31E-05 -9.04E-06 7.23E-07 -2.26E-08 S14 -3.86E-02 4.64E-03 -4.32E-04 2.76E-05 -1.14E-06 2.54E-08 -1.77E-10

[0134] Table 12

[0135] Table 13 shows the values ​​of the effective focal length f and the maximum half field of view Semi-FOV of the optical imaging lens 3001.

[0136] parameter f(mm) Semi-FOV(°) Numeric 3.89 74.97

[0137] Table 13

[0138] like Fig. 7AAs shown, the optical imaging lens 3001 also includes four supporting members, namely the second supporting member P2, the fourth supporting member P4, the fifth supporting member P5 and the sixth supporting member P6. The second supporting member P2 is placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 14 shows a basic parameter table of the supporting members of the optical imaging lens 3001, and the units of each parameter in Table 14 are all millimeters (mm). The above-mentioned supporting members can block the entry of extra external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3001 is enhanced.

[0139] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.65 13.459 6.247 3.3119

[0140] Table 14

[0141] Example 6

[0142] Figure 7B The structure diagram of the optical imaging lens 3002 according to Embodiment 6 of the present application is shown. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 7 will be omitted.

[0143] like Figure 7B As shown, the optical imaging lens 3002 includes a lens barrel P0, lens groups E1 to E7, and a supporting member group. The optical imaging lens 3002 also includes a stop STO (not shown) disposed between the third lens and the fourth lens. The lens group of the optical imaging lens 3002 is completely the same as the lens group of the optical imaging lens 3001 of Example 5. The basic parameters thereof are detailed in Tables 11 to 13, and will not be described in detail.

[0144] like Figure 7B As shown, the optical imaging lens 3002 also includes four supporting members, namely the second supporting member P2, the fourth supporting member P4, the fifth supporting member P5 and the sixth supporting member P6. The second supporting member P2 is placed on the image side of the second lens and is in at least partial contact with the image side of the second lens; the fourth supporting member P4 is placed on the image side of the fourth lens and is in at least partial contact with the image side of the fourth lens; the fifth supporting member P5 is placed on the image side of the fifth lens and is in at least partial contact with the image side of the fifth lens; the sixth supporting member P6 is placed on the image side of the sixth lens and is in at least partial contact with the image side of the sixth lens. Table 15 shows a basic parameter table of the supporting members of the optical imaging lens 3002, and the units of each parameter in Table 15 are millimeters (mm). The above-mentioned supporting members can block the entry of extra external light, so that the lens and the lens barrel can be better supported, and the structural stability of the optical imaging lens 3002 is enhanced.

[0145] parameter d2s D2s D2m d4s D4m d5s d6s d6m d0s d0m Numeric 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 Numeric 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 Numeric 1.65 13.459 6.547 3.3693

[0146] Table 15

[0147] Fig. 8A The axial chromatic aberration curves of the optical imaging lens 3001 of Example 5 and the optical imaging lens 3002 of Example 6 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 8B Astigmatism curves of the optical imaging lens 3001 of Example 5 and the optical imaging lens 3002 of Example 6 are shown, which represent meridional image curvature and sagittal image curvature. Figure 8C The magnification chromatic aberration curves of the optical imaging lens 3001 of Example 5 and the optical imaging lens 3002 of Example 6 are shown, which represent the deviations of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8C It can be seen that the optical imaging lens 3001 and the optical imaging lens 3002 provided in Example 5 and Example 6 can achieve good imaging quality.

[0148] In summary, the optical imaging lenses of Examples 1 to 6 satisfy the relationship shown in Table 16.

[0149]

[0150]

[0151] Table 16

[0152] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0153] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical imaging lens, characterized in that: include: A lens barrel and a lens group and a supporting member group placed in the lens barrel, wherein: The lens group includes, in order 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 with negative power, the object side surface is convex, and the image side surface is concave, the second lens has positive power, the third lens has positive power, the object side surface is concave, and the image side surface is convex, the fourth lens has positive power, the object side surface is convex, and the image side surface is convex, the fifth lens has negative power, the object side surface is concave, and the image side surface is concave, the sixth lens has positive power, the object side surface is convex, and the image side surface is convex, and the seventh lens has negative power, the object side surface is convex, and the image side surface is concave; The supporting member group comprises: 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; The effective semi-diameter of the object side of the fourth lens is smaller than the effective semi-diameter of each of the other lenses in the lens group; The inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D4m of the image side surface of the fourth supporting member, the effective semi-aperture DT11 of the object side surface of the first lens and the effective semi-aperture DT41 of the object side surface of the fourth lens satisfy: 1.6<(d0s-D4m) / (DT11-DT41)<2.1; The minimum aperture d0smin of the lens barrel in a direction perpendicular to the optical axis is located between the third lens and the fourth lens.

2. The optical imaging lens according to claim 1, wherein: The support member group further includes a second support member disposed on the image side of the second lens and in at least partial contact with the image side of the second lens; An outer diameter D2m of the image side surface of the second supporting member, an outer diameter D4s of the object side surface of the fourth supporting member, and a center thickness CT4 of the fourth lens on the optical axis satisfy: 0.9<(D2m-D4s) / CT4<2.

1.

3. The optical imaging lens according to claim 1, wherein: The effective half-diameter DT11 of the object side of the first lens and the effective half-diameter DT21 of the object side of the second lens meet the following conditions: 2.5 mm <DT11-DT21<5mm。 4. The optical imaging lens according to claim 1, wherein: The support member group further includes a second support member disposed on the image side of the second lens and in at least partial contact with the image side of the second lens; 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 lens and the third lens on the optical axis, and the maximum thickness CP2 of the second supporting member along the optical axis satisfy: 32.0 <CT3 / CT2+T23 / CP2<34.0。 5. The optical imaging lens according to claim 3, wherein: The support member group further includes a second support member disposed on the image side of the second lens and in at least partial contact with the image side of the second lens; The curvature radius 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: 1.9<(R2 / CT1) / N1<2.7; and The inner diameter d2s of the object side of the second supporting member, the maximum thickness CP2 of the second supporting member along the optical axis and the Abbe number V2 of the second lens satisfy: 10.0 <d2s / CP2 / V2<15.5。 6. The optical imaging lens according to claim 1, wherein: The supporting member group further includes a fifth supporting 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 curvature radius R9 of the object side surface of the fifth lens, the curvature radius R10 of the image side surface of the fifth lens, the inner diameter d4s of the object side surface of the fourth supporting member, and the inner diameter d5s of the object side surface of the fifth supporting member satisfy: -7.2<(R9+R10) / (d5s-d4s)<-2.

8.

7. The optical imaging lens according to claim 1, wherein: 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 supporting member satisfy: 0.6 <f4 / N4 / d4m<1.0。 8. The optical imaging lens according to claim 1, wherein: The optical imaging lens further includes a sixth supporting member disposed on the image side of the sixth lens and at least partially in contact with the image side surface of the sixth lens; The inner diameter d6m of the image side surface of the sixth supporting member, the inner diameter d6s of the object side surface of the sixth supporting member, the effective focal length f6 of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy: 0.6<(d6m-d6s) / (f6 / R12)<1.

0.

9. The optical imaging lens according to claim 7, wherein: The support member group further includes a second support member disposed on the image side of the second lens and in at least partial contact with the image side of the second lens; The inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D2s of the object side surface of the second supporting member and the refractive index N1 of the first lens satisfy: 2.2 <d0s / D2s×N1<2.8。 10. The optical imaging lens according to claim 8, wherein: The maximum thickness CP6 of the sixth supporting member along the optical axis direction and the center thickness CT6 of the sixth lens on the optical axis satisfy: 1.0≤CP6 / CT6<1.5.

Images