Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises lenses 1 to 7, a plurality of spacing elements and a lens barrel, the inner diameter d0s of the object side end face of the lens barrel and the inner diameter d0m of the image side end face of the lens barrel meet the following conditions: 1lt; d0s / d0mlt; 2; the maximum half field angle Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens meet the following conditions:-3lt; the method is characterized in that tan (Semi-FOV) / FNOlt; -2; the inner diameter d1s of the object side surface of the first spacing element, the effective focal length f1 of the first lens, the inner diameter d6s of the object side surface of the sixth spacing element and the effective focal length f7 of the seventh lens meet the following formula:-2lt; d1s / f1 + d6s / f7lt; 0. The problem of serious stray light of an optical imaging lens in the prior art is solved.

Description

Technical Field

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

[0002] With the rapid development of technology, small and portable video electronic devices have become increasingly popular. At the same time, the market's requirements for the imaging performance and quality of such products are also getting higher and higher. Especially for the ultra-wide-angle optical imaging lenses equipped, in order to meet the requirements of high image quality, a large number of lens elements are used. More light entering from the large front aperture is likely to generate stray light in the barrel and the structural parts of the lenses. At the same time, the size limitation at the rear end of the lens makes the light easily incident on the structural parts of the lenses, and finally a large amount of stray light reaches the imaging surface. Therefore, how to control the thickness of the lenses of the optical imaging lens and the distance between the spacer elements and the barrel, and reduce the stray light and improve the image quality while ensuring the ultra-wide angle is a very important issue. Summary of the Invention

[0003] The main object of the present invention is to provide an optical imaging lens to solve the problem of serious stray light in the optical imaging lens in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens, including: a lens group, the lens group sequentially includes lens one to lens seven arranged at intervals from the object side to the image side of the optical imaging lens, the optical powers of lens one, lens two, and lens seven are negative, and the optical powers of lens three, lens five, and lens six are positive; a plurality of spacer elements, the plurality of spacer elements at least include spacer element one located on the image side of lens one and at least partially in contact with the image side surface of lens one, and spacer element six located on the image side of lens six and at least partially in contact with lens six; a barrel, the barrel is used to accommodate the lens group and the plurality of spacer elements; wherein, the inner diameter d0s of the object side end face of the barrel and the inner diameter d0m of the image side end face of the barrel satisfy: 1 < d0s / d0m < 2; the maximum half field of view Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d1s of the object side surface of spacer element one, the effective focal length f1 of lens one, the inner diameter d6s of the object side surface of spacer element six, and the effective focal length f7 of lens seven satisfy: -2 < d1s / f1 + d6s / f7 < 0.

[0005] According to another aspect of the present invention, there is provided an optical imaging lens, comprising: a lens group, which sequentially includes lens one to lens seven arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens one, lens two, and lens seven are negative, and the optical powers of lens three, lens five, and lens six are positive; a plurality of spacer elements, which at least include spacer element one located on the image side of lens one and at least partially in contact with the image side surface of lens one, spacer element two located on the image side of lens two and at least partially in contact with the image side surface of lens two, spacer element three located on the image side of lens three and at least partially in contact with the image side surface of lens three, and spacer element six located on the image side of lens six and at least partially in contact with lens six; a lens barrel for accommodating the lens group and the plurality of spacer elements; wherein, the inner diameter d0s of the object-side end face of the lens barrel and the inner diameter d0m of the image-side end face of the lens barrel satisfy: 1 < d0s / d0m < 2; the maximum semi-field angle Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d2s of the object-side surface of spacer element two, the inner diameter d3s of the object-side surface of spacer element three, the effective focal length f2 of lens two, and the effective focal length f3 of lens three satisfy: -3 < (d2s + d3s) / (f2 + f3) < 8. The present application provides a seven-piece optical imaging lens. On the premise of 1 < d0s / d0m < 2 and -3 < tan(Semi-FOV) / FNO < -2, the optical imaging lens has the characteristic of ultra-wide angle. The inner diameter of the object-side end face of the lens barrel is one to two times that of the image-side end face of the lens barrel, which can ensure ultra-wide angle imaging. However, a large amount of light entering the front end of the optical imaging lens at this time is likely to generate stray light, affecting the imaging effect. By controlling the effective focal lengths of lens two and lens three and the inner diameter sizes of spacer element two and spacer element three, the inner diameters of the object-side end face and the image-side end face of the lens barrel are mutually restricted, which can effectively avoid the generation of crab foot or feather-like stray light at the diaphragm position. At the same time, the inner diameters of spacer element two and spacer element three are used to intercept unnecessary light, avoiding the light from the front-end system from entering the non-effective diameter part of the lens, and reducing the stray light formed by the reflection of light by internal components. It is also beneficial for the smooth transition between the structural parts of lens two and lens three and the effective diameter.

[0006] According to another aspect of the present invention, an optical imaging lens is provided, comprising: a lens group, which sequentially includes lens one to lens seven arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens one, lens two, and lens seven are negative, and the optical powers of lens three, lens five, and lens six are positive; a plurality of spacer elements, which at least include spacer element one located on the image side of lens one and at least partially in contact with the image side surface of lens one, and spacer element six located on the image side of lens six and at least partially in contact with lens six; a lens barrel for accommodating the lens group and the plurality of spacer elements; wherein, the inner diameter d0s of the object side end face of the lens barrel and the inner diameter d0m of the image side end face of the lens barrel satisfy: 1 < d0s / d0m < 2; the maximum half field of view Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d6s of the object side surface of spacer element six, the effective focal length f6 of lens six, and the effective focal length f7 of lens seven satisfy: -4 < d6s / (f6 + f7) < 0. This application provides a seven-piece optical imaging lens. On the premise of 1 < d0s / d0m < 2 and -3 < tan(Semi-FOV) / FNO < -2, the optical imaging lens has the characteristic of an ultra-wide angle. The inner diameter of the object side end face of the lens barrel is one to two times the inner diameter of the image side end face of the lens barrel, which can ensure ultra-wide angle imaging. However, since the light at the rear end of the optical imaging lens is easily incident on the structural part of the lens to generate stray light, which affects the imaging effect. By controlling the effective focal lengths of lens six and lens seven and the inner diameter size of spacer element six, the mutual constraint between the inner diameters of the object side end face and the image side end face of the lens barrel can effectively avoid the generation of crab foot or feather-like stray light at the aperture position. At the same time, spacer element six can intercept unnecessary light from lens six to lens seven and the stray light reflected back by the rear filter, preventing the light from transmitting and reflecting in the structural part of the lens to generate more stray light. Combined with the constraint on the effective focal lengths of lens six and lens seven, it helps the front and rear lens optical systems to connect, making the imaging quality higher and reducing imaging distortion.

[0007] Further, the plurality of spacer elements further includes spacer element three located on the image side of lens three and at least partially in contact with the image side surface of lens three. The inner diameter of spacer element three is the smallest among the inner diameters of all the spacer elements of the plurality of spacer elements. The outer diameter D3m of the image side surface of spacer element three, the inner diameter d3m of the image side surface of spacer element three, the effective focal length f3 of lens three, and the effective focal length f4 of lens four satisfy: -1 < (D3m - d3m) / (f3 - f4) < 0.1.

[0008] Further, the first lens is a meniscus lens, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D1s of the object side surface of the first spacer element, the curvature radius R1 of the object side surface of the first lens, and the curvature radius R2 of the image side surface of the first lens satisfy: 0 < (d0s - D1s) / (R1 - R2) < 0.7.

[0009] Further, the on-axis distance T12 between the first lens and the second lens, the central thickness CT1 of the first lens, and the central thickness CT2 of the second lens satisfy: 1.5 < T12 / (CT1 + CT2) < 3. The outer diameter D1s of the object side surface of the first spacer element, the curvature radius R2 of the image side surface of the first lens, and the curvature radius R3 of the object side surface of the second lens satisfy: -1 < D1s / (R2 - R3) < 2.

[0010] Further, the plurality of spacer elements further include a second spacer element located 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 third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The inner diameter d2s of the object side surface of the second spacer element, the inner diameter d3s of the object side surface of the third spacer element, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: -3 < (d2s + d3s) / (f2 + f3) < 8.

[0011] Further, the plurality of spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The outer diameter D3m of the image side surface of the third spacer element and the inner diameter d3m of the image side surface of the third spacer element satisfy: 4 mm < D3m - d3m < 8 mm. The inner diameter d3s of the object side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: 0 < d3s / f3 + d3m / f4 < 1.

[0012] Further, the plurality of spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens. The distance EP34 along the optical axis direction from the image side surface of the third spacer element to the object side surface of the fourth spacer element and the central thickness CT4 of the fourth lens satisfy: 1 < EP34 / CT4 < 2. The outer diameter D3m of the object side surface of the third spacer element, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the outer diameter D4s of the object side surface of the fourth spacer element satisfy: -1 < D3m / R7 - D4s / R8 < 1.

[0013] Further, the multiple spacer elements further include a spacer element four located on the image side of the lens four and at least partially in contact with the image side surface of the lens four, and a spacer element five located on the image side of the lens five and at least partially in contact with the image side surface of the lens five. The distance EP56 along the optical axis from the image side surface of the spacer element five to the object side surface of the spacer element six, the central thickness CT6 of the lens six, the distance EP45 along the optical axis from the image side surface of the spacer element four to the object side surface of the spacer element five, and the central thickness CT5 of the lens five satisfy: 0.5 < EP56 / CT6 - EP45 / CT5 < 1.5.

[0014] Further, the multiple spacer elements further include a spacer element five located on the image side of the lens five and at least partially in contact with the image side surface of the lens five. The outer diameter D5s of the object side surface of the spacer element five, the inner diameter d5s of the object side surface of the spacer element five, the radius of curvature R10 of the image side surface of the lens five, and the radius of curvature R11 of the object side surface of the lens six satisfy: -5 < (D5s - d5s) / (R10 + R11) < 20.

[0015] Further, the inner diameter d6s of the object side surface of the spacer element six, the effective focal length f6 of the lens six, and the effective focal length f7 of the lens seven satisfy: -4 < d6s / (f6 + f7) < 0.

[0016] Further, the outer diameter D6m of the image side surface of the spacer element six, the inner diameter d6m of the image side surface of the spacer element six, and the central thickness CT7 of the lens seven satisfy: 2 < (D6m - d6m) / CT7 < 10.

[0017] Further, the multiple spacer elements further include a spacer element A located on the object side of the lens one and at least partially in contact with the object side surface of the lens one. The inner diameter dAs of the object side surface of the spacer element A, the inner diameter dAm of the image side surface of the spacer element A, and the effective focal length f of the optical imaging lens satisfy: -0.5 < (dAs - dAm) / f < 1.5.

[0018] Further, the multiple spacer elements further include a spacer element A located on the object side of the lens one and at least partially in contact with the object side surface of the lens one. The maximum thickness of the spacer element A is the largest among the maximum thicknesses of all the spacer elements of the multiple spacer elements.

[0019] Further, the inner wall surface of the lens barrel has a bearing portion protruding towards the optical axis, and the object side surface of the bearing portion is at least partially in contact with the image side surface of the lens seven.

[0020] Further, the distance TD on the optical axis from the object side surface of the lens one to the image side surface of the lens seven, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 5 < TD / EPD < 7. The height L of the lens barrel and the sum ∑CP of the maximum thicknesses of all the spacer elements of the multiple spacer elements satisfy: 7 < L / ∑CP < 9.

[0021] Further, the plurality of spacer elements further include a second spacer element located on the image side of the second lens and at least partially in contact with the image side surface of the second lens, a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens, and a fifth spacer element located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The inner diameter d1s of the object side surface of the first spacer element, the inner diameter d2s of the object side surface of the second spacer element, and the inner diameter d3s of the object side surface of the third spacer element satisfy: d1s > d2s > d3s. The inner diameter d4s of the object side surface of the fourth spacer element, the inner diameter d5s of the object side surface of the fifth spacer element, and the inner diameter d6s of the object side surface of the sixth spacer element satisfy: d4s < d5s < d6s.

[0022] Further, the distance EP60 from the image side surface of the sixth spacer element to the image side end surface of the lens barrel along the optical axis direction of the optical imaging lens, the central thickness CT7 of the seventh lens, the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element along the optical axis direction, and the central thickness CT1 of the first lens satisfy: -6 < EP60 / CT7 - EP01 / CT1 < 0.

[0023] Applying the technical solution of the present invention, the optical imaging lens includes a lens group, a plurality of spacer elements, and a lens barrel. The lens group sequentially includes the first lens to the seventh lens arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of the first lens, the second lens, and the seventh lens are negative, and the optical powers of the third lens, the fifth lens, and the sixth lens are positive. The plurality of spacer elements at least include a first spacer element located on the image side of the first lens and at least partially in contact with the image side surface of the first lens, and a sixth spacer element located on the image side of the sixth lens and at least partially in contact with the sixth lens. The lens barrel is used to accommodate the lens group and the plurality of spacer elements. Among them, the inner diameter d0s of the object side end surface of the lens barrel and the inner diameter d0m of the image side end surface of the lens barrel satisfy: 1 < d0s / d0m < 2. The maximum half field of view Semi - FOV of the optical imaging lens and the F - number FNO of the optical imaging lens satisfy: -3 < tan(Semi - FOV) / FNO < -2. The inner diameter d1s of the object side surface of the first spacer element, the effective focal length f1 of the first lens, the inner diameter d6s of the object side surface of the sixth spacer element, and the effective focal length f7 of the seventh lens satisfy: -2 < d1s / f1 + d6s / f7 < 0.

[0024] The present application provides a seven-piece optical imaging lens. On the premise that 1 < d0s / d0m < 2 and -3 < tan(Semi-FOV) / FNO < -2, the optical imaging lens has the characteristics of an ultra-wide angle. The inner diameter of the object-side end face of the lens barrel is one to two times that of the image-side end face of the lens barrel, which can ensure ultra-wide angle imaging. However, at this time, the optical imaging lens is prone to stray light at the object-side end and the image-side end of the lens barrel, affecting the imaging effect. By controlling the effective focal lengths of lens one and lens seven and the inner diameter dimensions of spacer one and spacer six, the present application can make the inner diameters of spacer one and spacer six restrict each other, effectively avoiding crab foot or feather-like stray light at the aperture position, and is also beneficial to the light reception of the front and rear optical systems. It is beneficial to avoid the light of the front-end system from entering the non-effective diameter part of the lens, and prevent the light from being reflected by the internal components to form stray light and reach the image plane to generate image noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 It shows a partial parameter schematic diagram of the optical imaging lens according to an optional embodiment of the present invention;

[0027] Figure 2 It shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present invention;

[0028] Figure 3 and Figure 4 respectively show the axial chromatic aberration curve and the astigmatism curve of Embodiment 1 of the present invention;

[0029] Figure 5 It shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present invention;

[0030] Figure 6 It shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present invention;

[0031] Figure 7 It shows a schematic structural diagram of the optical imaging lens according to Embodiment 4 of the present invention;

[0032] Figure 8 and Figure 9 respectively show the axial chromatic aberration curve and the astigmatism curve of Embodiment 4 of the present invention;

[0033] Figure 10 It shows a schematic structural diagram of the optical imaging lens according to Embodiment 5 of the present invention;

[0034] Figure 11Shows a schematic structural diagram of the optical imaging lens according to the sixth embodiment of the present invention;

[0035] Figure 12 Shows a schematic structural diagram of the optical imaging lens according to the seventh embodiment of the present invention;

[0036] Figure 13 and Figure 14 respectively show the axial chromatic aberration curve and astigmatism curve of the optical imaging lens according to the seventh embodiment of the present invention;

[0037] Figure 15 Shows a schematic structural diagram of the optical imaging lens according to the eighth embodiment of the present invention;

[0038] Figure 16 Shows a schematic structural diagram of the optical imaging lens according to the ninth embodiment of the present invention;

[0039] Figure 17 Shows the stray light diagram of the optical imaging lens according to an alternative embodiment of the present invention under the conditions of d0s / d0m = 1.2, tan(Semi - FOV) / FNO = - 2.58, and d1s / f1 + d6s / f7 = - 0.86;

[0040] Figure 18 Shows the stray light diagram of the optical imaging lens according to an alternative embodiment of the present invention under the conditions of d0s / d0m = 1.2, tan(Semi - FOV) / FNO = - 2.58, and d1s / f1 + d6s / f7 = - 0.85;

[0041] Figure 19 Shows the stray light diagram of the optical imaging lens in the prior art under the conditions of d0s / d0m = 1.2, tan(Semi - FOV) / FNO = - 2.58, and d1s / f1 + d6s / f7 = - 10;

[0042] Figure 20 Shows the stray light diagram of the optical imaging lens in the prior art under the conditions of d0s / d0m = 1.2, tan(Semi - FOV) / FNO = - 2.58, and d1s / f1 + d6s / f7 = 5.

[0043] Among them, the above - mentioned drawings include the following reference numerals:

[0044] P0, lens barrel; PA, spacer element A; E1, first lens; S1, object side of the first lens; S2, image side of the first lens; P1, first spacer element; E2, second lens; S3, object side of the second lens; S4, image side of the second lens; P2, second spacer element; E3, third lens; S5, object side of the third lens; S6, image side of the third lens; P3, third spacer element; E4, fourth lens; S7, object side of the fourth lens; S8, image side of the fourth lens; P4, fourth spacer element; E5, fifth lens; S9, object side of the fifth lens; S10, image side of the fifth lens; P5, fifth spacer element; E6, sixth lens; S11, object side of the sixth lens;

[0045] S12, image side of the sixth lens; P6, sixth spacer element; E7, seventh lens; S13, object side of the seventh lens; S14, image side of the seventh lens. Detailed implementation mode

[0046] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0047] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0048] In the present invention, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the vertical, perpendicular or gravitational direction of the component itself; similarly, for the sake of easy understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present invention.

[0049] It should be noted that in this specification, the expressions such as "first, second, third, etc." are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0050] In the drawings, for the sake of easy explanation, the thickness, size and shape of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only for illustration and are not drawn to an exact scale.

[0051] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closer to the object side is the object side surface of the lens, and the surface of each lens closer to the image side is called the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the positive or negative of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software) is used to judge the convexity and concavity. Taking the object side surface as an example, when the R value is positive, it is judged as convex, and when the R value is negative, it is judged as concave; taking the image side surface as an example, when the R value is positive, it is judged as concave, and when the R value is negative, it is judged as convex.

[0052] In order to solve the problem of serious stray light in the optical imaging lens in the prior art, the present invention provides an optical imaging lens.

[0053] The first embodiment

[0054] As Figures 1 to 18 shown, the optical imaging lens includes a lens group, a plurality of spacer elements, and a lens barrel. The lens group sequentially includes lens one to lens seven arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens one, lens two, and lens seven are negative, and the optical powers of lens three, lens five, and lens six are positive; the plurality of spacer elements at least include spacer element one located on the image side of lens one and at least partially in contact with the image side surface of lens one, and spacer element six located on the image side of lens six and at least partially in contact with lens six; the lens barrel is used to accommodate the lens group and the plurality of spacer elements; wherein, the inner diameter d0s of the object side end face of the lens barrel and the inner diameter d0m of the image side end face of the lens barrel satisfy: 1 < d0s / d0m < 2; the maximum semi-field angle Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d1s of the object side surface of spacer element one, the effective focal length f1 of lens one, the inner diameter d6s of the object side surface of spacer element six, and the effective focal length f7 of lens seven satisfy: -2 < d1s / f1 + d6s / f7 < 0.

[0055] The present application provides a seven-element optical imaging lens. <d0s / d0m<2、-3<tan(Semi-FOV) / FNO<-2的前提下,光学成像镜头具有超广角的特性,镜筒的物侧端面的内径是镜筒的像侧端面的内径的一到两倍,可以保证超广角的成像,但此时的光学成像镜头容易在镜筒的物侧端以及像侧端产生杂光,影响成像效果。本申请通过控制透镜一、透镜七的有效焦距以及间隔元件一、间隔元件六的内径尺寸,可以使间隔元件一、间隔元件六的内径相互约束,有效规避光阑位置产生蟹脚或羽毛类杂光,还有利于光学前后系统光线承接,有利于规避前端系统的光线入射到透镜的非有效径部分,避免光线经内部部品反射形成杂光到达像面产生像噪。

[0056] Preferably, 1.0 <d0s / d0m<1.9。

[0057] Preferably, -2.8 <tan(Semi-FOV) / FNO<-2.3。

[0058] Preferably, -1.5 <d1s / f1+d6s / f7<-0.2。

[0059] Table 1 below shows a comparison between the optical imaging lens of the prior art and the optical imaging lens of the present application.

[0060]

[0061] Table 1

[0062] As shown in Table 1 and Figure 19 As shown, in the prior art, under the conditions of d0s / d0m=1.2 and tan(Semi-FOV) / FNO=-2.58, the optical imaging lens satisfies d1s / f1+d6s / f7=-10, and the stray light energy is relatively large. Figure 20 As shown, in the prior art, the optical imaging lens satisfies d1s / f1+d6s / f7=5 under the conditions of d0s / d0m=1.2 and tan(Semi-FOV) / FNO=-2.58, and also has strong stray light energy.

[0063] As shown in Table 1 and Figure 17 As shown, the optical imaging lens of an optional embodiment of the present application satisfies d1s / f1+d6s / f7=-0.86 under the conditions of d0s / d0m=1.2 and tan(Semi-FOV) / FNO=-2.58, and the stray light energy is relatively weak. As shown in Table 1 and Figure 18As shown, under the conditions of d0s / d0m=1.2 and tan(Semi-FOV) / FNO=-2.58, the optical imaging lens of an optional embodiment of the present application satisfies d1s / f1+d6s / f7=-0.85, and the stray light is significantly less. Figure 19 and Figure 20 Compared with the optical imaging lens in the prior art shown, the optical imaging lens of the present application can achieve a good stray light elimination effect.

[0064] In this embodiment, the plurality of spacer elements further include a spacer element three located on the image side of lens three and at least partially in contact with the image side surface of lens three, the inner diameter of spacer element three is the smallest among the inner diameters of all spacer elements of the plurality of spacer elements, and the outer diameter D3m of the image side surface of spacer element three, the inner diameter d3m of the image side surface of spacer element three, the effective focal length f3 of lens three, and the effective focal length f4 of lens four satisfy: -1<(D3m-d3m) / (f3-f4)<0.1. By limiting (D3m-d3m) / (f3-f4) within a reasonable range, the relationship between the image side annular band width of spacer element three and the effective focal lengths of lenses three and four is constrained, which is beneficial to the connection of the two optical systems before and after the optical aperture of the wide-angle optical imaging lens and the design and arrangement of the lenses. The annular band constraint on the image side of spacer element three is beneficial to the support design and assembly of lenses three and four, and improves the assembly stability of the optical imaging lens. Preferably, -0.8<(D3m-d3m) / (f3-f4)<0.5.

[0065] In this embodiment, the lens 1 is a meniscus lens, the object side surface of the lens 1 is a convex surface, the image side surface of the lens 1 is a concave surface, and the inner diameter d0s of the object side end surface of the lens barrel, the outer diameter D1s of the object side surface of the spacer element 1, the curvature radius R1 of the object side surface of the lens 1, and the curvature radius R2 of the image side surface of the lens 1 satisfy: 0<(d0s-D1s) / (R1-R2)<0.7. By limiting (d0s-D1s) / (R1-R2) within a reasonable range, the inner and outer diameter difference of the front end of the lens barrel and the curvature radius of the object side surface and the image side surface of the lens 1 are constrained, which is conducive to avoiding the curvature of the object side surface of the lens 1 being too small to cause the front end of the lens to bulge, avoiding damage to the object side surface of the lens 1, and also significantly improving the adaptability of the lens 1 to the entire lens component. Preferably, 0<(d0s-D1s) / (R1-R2)<0.6.

[0066] In this embodiment, the on-axis distance T12 between the first lens and the second lens, the central thickness CT1 of the first lens, and the central thickness CT2 of the second lens satisfy: 1.5 < T12 / (CT1 + CT2) < 3. The outer diameter D1s of the object side surface of the first spacer element, the curvature radius R2 of the image side surface of the first lens, and the curvature radius R3 of the object side surface of the second lens satisfy: -1 < D1s / (R2 - R3) < 2. By restricting T12 / (CT1 + CT2) and D1s / (R2 - R3) within reasonable ranges, it is beneficial to reduce the risk of the image side surface of the first lens being too close to the object side surface of the second lens and interference. At the same time, the constraint on the curvature radii of the adjacent surfaces of the first lens and the second lens gives a reasonable layout space for the first spacer element, which is beneficial to intercepting unnecessary light rays from reaching the image surface through the first spacer element, further ensuring the imaging quality of the optical imaging lens. Preferably, 1.55 < T12 / (CT1 + CT2) < 2.90, -0.8 < D1s / (R2 - R3) < 1.8.

[0067] In this embodiment, the multiple spacer elements further include a second spacer element located 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 third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The inner diameter d2s of the object side surface of the second spacer element, the inner diameter d3s of the object side surface of the third spacer element, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens satisfy: -3 < (d2s + d3s) / (f2 + f3) < 8. By restricting (d2s + d3s) / (f2 + f3) within a reasonable range, it is beneficial for the thickness design of the spacer elements and intercepting unnecessary light rays through the spacer elements, reducing the stray light of the lens. It is also possible to control the smooth transition between the structural parts and the effective diameter of the second lens and the third lens. Preferably, -2.8 < (d2s + d3s) / (f2 + f3) < 7.5.

[0068] In this embodiment, the multiple spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The outer diameter D3m of the image side surface of the third spacer element and the inner diameter d3m of the image side surface of the third spacer element satisfy: 4 mm < D3m - d3m < 8 mm. The inner diameter d3s of the object side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens satisfy: 0 < d3s / f3 + d3m / f4 < 1. By restricting D3m - d3m and d3s / f3 + d3m / f4 within reasonable ranges, it is beneficial for the design and layout of the third spacer element, the third lens, and the fourth lens. At the same time, the annular zone control of the third spacer element is beneficial for the processing and manufacturing of the spacer element. Preferably, 4.5 mm < D3m - d3m < 7.8 mm, 0.1 < d3s / f3 + d3m / f4 < 0.9.

[0069] In this embodiment, the plurality of spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens. The distance EP34 along the optical axis direction from the image side surface of the third spacer element to the object side surface of the fourth spacer element and the central thickness CT4 of the fourth lens satisfy: 1 < EP34 / CT4 < 2. The outer diameter D3m of the object side surface of the third spacer element, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the outer diameter D4s of the object side surface of the fourth spacer element satisfy: -1 < D3m / R7 - D4s / R8 < 1. By limiting EP34 / CT4 and D3m / R7 - D4s / R8 within reasonable ranges, it is beneficial to avoid interference in the effective diameter regions of the third lens and the fourth lens, and controlling the outer diameters of the third spacer element and the fourth spacer element is conducive to ensuring the processability and aesthetics of the entire lens barrel. Preferably, 1.05 < EP34 / CT4 < 1.85, -0.80 < D3m / R7 - D4s / R8 < 0.98.

[0070] In this embodiment, the plurality of spacer elements further include a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens, and a fifth spacer element located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The distance EP56 along the optical axis direction from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element, the central thickness CT6 of the sixth lens, the distance EP45 along the optical axis direction from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, and the central thickness CT5 of the fifth lens satisfy: 0.5 < EP56 / CT6 - EP45 / CT5 < 1.5. By limiting EP56 / CT6 - EP45 / CT5 within a reasonable range, it is beneficial to control the edge thickness ratio of the lens, improve processability, and it is also beneficial for the bearing of the structural part of the lens and the spacer element to be in a "one" form, minimizing the assembly difficulty and risk. Preferably, 0.7 < EP56 / CT6 - EP45 / CT5 < 1.5.

[0071] In this embodiment, the plurality of spacer elements further includes a spacer element five located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The following relationship is satisfied among the outer diameter D5s of the object side surface of the spacer element five, the inner diameter d5s of the object side surface of the spacer element five, the radius of curvature R10 of the image side surface of the fifth lens, and the radius of curvature R11 of the object side surface of the sixth lens: -5 < (D5s - d5s) / (R10 + R11) < 20. By restricting (D5s - d5s) / (R10 + R11) within a reasonable range, while ensuring sufficient bearing area, it is beneficial to the processing of the spacer element five. The reasonable inner diameter constraint on the spacer element five can effectively intercept unnecessary light from passing through the lens, and the control of the radius of curvature of the fifth lens is beneficial to reducing the risk of interference between the assembled lens and the spacer element. Preferably, -4 < (D5s - d5s) / (R10 + R11) < 17.

[0072] In this embodiment, the following relationship is satisfied among the inner diameter d6s of the object side surface of the spacer element six, the effective focal length f6 of the sixth lens, and the effective focal length f7 of the seventh lens: -4 < d6s / (f6 + f7) < 0. By restricting d6s / (f6 + f7) within a reasonable range, it is beneficial to intercept unnecessary light from the sixth lens to the seventh lens, avoid generating too much stray light that affects the imaging effect. At the same time, the constraint on the effective focal lengths of the sixth lens and the seventh lens helps the front and rear lens optical systems to connect, making the imaging quality higher and reducing imaging distortion. Preferably, -3.9 < d6s / (f6 + f7) < -0.1.

[0073] In this embodiment, the following relationship is satisfied among the outer diameter D6m of the image side surface of the spacer element six, the inner diameter d6m of the image side surface of the spacer element six, and the central thickness CT7 of the seventh lens: 2 < (D6m - d6m) / CT7 < 10. By restricting (D6m - d6m) / CT7 within a reasonable range, it is beneficial to constrain the central thickness of the seventh lens, prevent its central thickness from being too large, reduce the risk of interference between the effective diameter area and the inner diameter of the spacer element, and avoid abnormal relative illuminance of the image plane. At the same time, the bandwidth constraint on the spacer element six is beneficial to the assembly and processing of the spacer element six. Preferably, 2.5 < (D6m - d6m) / CT7 < 9.8.

[0074] In this embodiment, the plurality of spacer elements further includes a spacer element A located on the object side of the first lens and at least partially in contact with the object side surface of the first lens. The inner diameter dAs of the object side surface of the spacer element A, the inner diameter dAm of the image side surface of the spacer element A, and the effective focal length f of the optical imaging lens satisfy: -0.5 < (dAs - dAm) / f < 1.5. Since the spacer element A serves as the light entrance aperture of the front lens and the fixing member of the lens, by restricting (dAs - dAm) / f within a reasonable range, it helps to avoid an excessive aspect ratio of the spacer element A when controlling the total amount of light in the entire optical system, which is beneficial to the molding of the spacer element A; at the same time, combined with the control of the effective focal length of the optical imaging lens, it can reduce the risk of the lens showing a large size at one end and a small size at the other end. Preferably, -0.3 < (dAs - dAm) / f < 1.4.

[0075] In this embodiment, the plurality of spacer elements further includes a spacer element A located on the object side of the first lens and at least partially in contact with the object side surface of the first lens. The maximum thickness of the spacer element A is the largest among the maximum thicknesses of all the spacer elements of the plurality of spacer elements. The spacer element A serves as the light entrance aperture of the front lens and the fixing member of the lens. Controlling the maximum thickness of the spacer element A to be the largest among all the spacer elements helps to fix the lenses inside the lens; at the same time, it helps to improve the reliability of destructive experiments such as lens drop and mechanical shock.

[0076] In this embodiment, the inner wall surface of the lens barrel has a bearing portion protruding towards the optical axis, and the object side surface of the bearing portion is at least partially in contact with the image side surface of the seventh lens. By providing the bearing portion, it helps with the demolding of the lens barrel after molding. It reduces the risks of deformation of the inner diameter of the lens barrel, poor performance after lens assembly, and low yield rate caused by a large demolding force of the lens barrel.

[0077] In this embodiment, the distance TD on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens, and the entrance pupil diameter EPD of the optical imaging lens satisfy: 5 < TD / EPD < 7. The height L of the lens barrel and the sum ∑CP of the maximum thicknesses of all the spacer elements of the plurality of spacer elements satisfy: 7 < L / ∑CP < 9. By restricting TD / EPD and L / ∑CP within a reasonable range, it helps with the design and arrangement of the lenses inside the lens barrel and tends to be in a "one" shape, improving the assembly stability and the overall aesthetics of the lens. Preferably, 5.5 < TD / EPD < 6.5, 6.8 < L / ∑CP < 8.9.

[0078] In this embodiment, the plurality of spacer elements further include a second spacer element located on the image side of the second lens and at least partially in contact with the image side surface of the second lens, a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens, and a fifth spacer element located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The inner diameters d1s of the object side surface of the first spacer element, d2s of the object side surface of the second spacer element, and d3s of the object side surface of the third spacer element satisfy: d1s > d2s > d3s. The inner diameters d4s of the object side surface of the fourth spacer element, d5s of the object side surface of the fifth spacer element, and d6s of the object side surface of the sixth spacer element satisfy: d4s < d5s < d6s. By controlling d1s > d2s > d3s and d4s < d5s < d6s, it is helpful for the design of the spacer elements and internal lenses inside the wide-angle optical imaging lens. When presenting high-quality images, the noise of the image is less or even non-existent.

[0079] In this embodiment, the distance EP60 from the image side surface of the sixth spacer element to the image side end surface of the lens barrel along the optical axis direction of the optical imaging lens, the central thickness CT7 of the seventh lens, the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element along the optical axis direction, and the central thickness CT1 of the first lens satisfy: -6 < EP60 / CT7 - EP01 / CT1 < 0. By restricting EP60 / CT7 - EP01 / CT1 within a reasonable range, the inner diameters of the object side end surface and the image side end surface of the lens barrel are mutually restricted, which can effectively avoid the occurrence of crab legs or feather-like stray light at the aperture position, and is also beneficial for the light reception of the front and rear optical systems. It is beneficial to avoid the light of the front-end system from entering the non-effective diameter part of the lens, and prevent the light from being reflected by the internal components to form stray light and reach the image surface to generate image noise.

[0080] Second Embodiment

[0081] As Figures 1 to 18As shown in the figure, the optical imaging lens includes a lens group, a plurality of spacer elements, and a lens barrel. The lens group sequentially includes lens 1 to lens 7 arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens 1, lens 2, and lens 7 are negative, and the optical powers of lens 3, lens 5, and lens 6 are positive. The plurality of spacer elements at least include spacer element 1 located on the image side of lens 1 and at least partially in contact with the image side surface of lens 1, spacer element 2 located on the image side of lens 2 and at least partially in contact with the image side surface of lens 2, spacer element 3 located on the image side of lens 3 and at least partially in contact with the image side surface of lens 3, and spacer element 6 located on the image side of lens 6 and at least partially in contact with lens 6. The lens barrel is used to accommodate the lens group and the plurality of spacer elements. Among them, the inner diameter d0s of the object-side end face of the lens barrel and the inner diameter d0m of the image-side end face of the lens barrel satisfy: 1 < d0s / d0m < 2; the maximum half field of view Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d2s of the object-side surface of spacer element 2, the inner diameter d3s of the object-side surface of spacer element 3, the effective focal length f2 of lens 2, and the effective focal length f3 of lens 3 satisfy: -3 < (d2s + d3s) / (f2 + f3) < 8.

[0082] The present application provides a seven-piece optical imaging lens. On the premise of 1 < d0s / d0m < 2 and -3 < tan(Semi-FOV) / FNO < -2, the optical imaging lens has the characteristic of an ultra-wide angle. The inner diameter of the object-side end face of the lens barrel is one to two times the inner diameter of the image-side end face of the lens barrel, which can ensure ultra-wide angle imaging. However, a large amount of light entering the front end of the optical imaging lens at this time is likely to generate stray light, affecting the imaging effect. By controlling the effective focal lengths of lens 2 and lens 3 and the inner diameter sizes of spacer element 2 and spacer element 3, the mutual restraint of the inner diameters of the object-side end face and the image-side end face of the lens barrel can effectively avoid the generation of crab foot or feather-like stray light at the aperture position. At the same time, the unnecessary light is intercepted by the inner diameters of spacer element 2 and spacer element 3, avoiding the light of the front-end system from entering the non-effective diameter part of the lens, and reducing the stray light formed by the reflection of light by internal components. It is also beneficial to the smooth transition of the structural part of lens 2 and lens 3 to the effective diameter.

[0083] Preferably, 1.0 < d0s / d0m < 1.9.

[0084] Preferably, -2.8 < tan(Semi-FOV) / FNO < -2.3.

[0085] Preferably, -2.8 < (d2s + d3s) / (f2 + f3) < 7.5.

[0086] This embodiment may also include other conditional expressions in the first embodiment, which will not be elaborated here one by one.

[0087] Third Embodiment

[0088] As shown Figures 1 to 18 in the figure, the optical imaging lens includes a lens group, a plurality of spacer elements, and a lens barrel. The lens group sequentially includes lens 1 to lens 7 arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens 1, lens 2, and lens 7 are negative, and the optical powers of lens 3, lens 5, and lens 6 are positive. The plurality of spacer elements at least include spacer element 1 located on the image side of lens 1 and at least partially in contact with the image side surface of lens 1, and spacer element 6 located on the image side of lens 6 and at least partially in contact with lens 6. The lens barrel is used to accommodate the lens group and the plurality of spacer elements. Among them, the inner diameter d0s of the object-side end surface of the lens barrel and the inner diameter d0m of the image-side end surface of the lens barrel satisfy: 1 < d0s / d0m < 2; the maximum half field of view Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; the inner diameter d6s of the object-side surface of spacer element 6, the effective focal length f6 of lens 6, and the effective focal length f7 of lens 7 satisfy: -4 < d6s / (f6 + f7) < 0.

[0089] This application provides a seven-piece optical imaging lens. On the premise of 1 < d0s / d0m < 2 and -3 < tan(Semi-FOV) / FNO < -2, the optical imaging lens has the characteristics of an ultra-wide angle. The inner diameter of the object-side end surface of the lens barrel is one to two times that of the image-side end surface of the lens barrel, which can ensure ultra-wide angle imaging. However, since light at the rear end of the optical imaging lens is easily incident on the structural part of the lens to generate stray light, affecting the imaging effect. In this application, by controlling the effective focal lengths of lens 6 and lens 7 and the inner diameter size of spacer element 6, the mutual restraint of the inner diameters of the object-side end surface and the image-side end surface of the lens barrel can effectively avoid the generation of crab leg or feather-like stray light at the diaphragm position. At the same time, spacer element 6 can intercept unnecessary light from lens 6 to lens 7 and the stray light reflected back by the rear filter, preventing more stray light from being generated during the transmission and reflection of light in the structural part of the lens. Combined with the constraint on the effective focal lengths of lens 6 and lens 7, it helps the front and rear lens optical systems to connect, resulting in higher imaging quality and reduced imaging distortion.

[0090] Preferably, 1.0 < d0s / d0m < 1.9.

[0091] Preferably, -2.8 < tan(Semi-FOV) / FNO < -2.3.

[0092] Preferably, -3.9 < d6s / (f6 + f7) < -0.1.

[0093] This embodiment may also include other conditional expressions in the first embodiment, which will not be elaborated here one by one.

[0094] Optionally, the above 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. The optical imaging lens in the present application may employ multiple lenses, such as the above seven lenses. By reasonably allocating the effective focal lengths, surface shapes, central thicknesses of the respective lenses, and the on-axis distances between the respective lenses, etc., the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the optical imaging lens more conducive to production and applicable to portable electronic devices such as smart phones.

[0095] Figure 1 A schematic structural diagram of an optical imaging lens of the present application is shown. Figure 1 Parameters such as d2s, d6m, D3m, etc. are also marked therein to clearly and intuitively understand the meaning of the parameters. For the convenience of demonstrating the structure of the optical imaging lens and the specific surface shape, these parameters will no longer be shown in the drawings when specific embodiments are described subsequently.

[0096] Among them, Dis refers to the outer diameter of the object side surface of the spacer element i, dis refers to the inner diameter of the object side surface of the spacer element i, Dim refers to the outer diameter of the image side surface of the spacer element i, dim refers to the inner diameter of the image side surface of the spacer element i, CPi refers to the maximum thickness of the spacer element i, that is, the maximum distance along the optical axis direction from the object side surface to the image side surface of the spacer element i, EPij refers to the distance along the optical axis direction between the image side surface of the spacer element i and the object side surface of the spacer element j, where i and j are positive integers both greater than or equal to 1. And d0s is the inner diameter of the object side end face of the lens barrel, D0m is the outer diameter of the image side end face of the lens barrel. The maximum height L of the lens barrel P0 refers to the maximum distance along the optical axis direction from the object side end face of the lens barrel P0 to the image side end face of the lens barrel P0.

[0097] The following further describes, with reference to the drawings, examples of the specific surface shapes and parameters of the optical imaging lens applicable to the above embodiments.

[0098] It should be noted that any one of the following Embodiment 1 to Embodiment 9 is applicable to all embodiments of the present application.

[0099] Embodiment 1

[0100] As Figures 2 to 4 shown, the optical imaging lens of Embodiment 1 of the present application is described.

[0101] As Figure 2As shown, the optical imaging lens sequentially includes a spacer element APA, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7 from the object side to the image side. Among them, on the inner wall surface of the lens barrel, there is a supporting portion extending towards the optical axis, and at least part of the supporting portion supports on the image side surface of the seventh lens.

[0102] As Figure 2 shown, the object side surface of the first lens is S1, the image side surface of the first lens is S2, the object side surface of the second lens is S3, the image side surface of the second lens is S4, the object side surface of the third lens is S5, the image side surface of the third lens is S6, the object side surface of the fourth lens is S7, the image side surface of the fourth lens is S8, the object side surface of the fifth lens is S9, the image side surface of the fifth lens is S10, the object side surface of the sixth lens is S11, the image side surface of the sixth lens is S12, the object side surface of the seventh lens is S13, and the image side surface of the seventh lens is S14.

[0103] Table 2 shows the basic structural parameter table of the optical imaging lens in the first embodiment. Among them, the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0104]

[0105]

[0106] Table 2

[0107] In Table 2, the object side surface S15 of the filter, the image side surface S16 of the filter, and the imaging surface S17 are also given.

[0108] In this embodiment, the second lens to the seventh lens are all aspherical lenses. The surface profiles of the respective aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0109]

[0110] Among them, x is the sagitta, the distance from the vertex of the aspherical surface at the position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic constant; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the higher-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the respective aspherical mirror surfaces in this embodiment.

[0111]

[0112]

[0113] Table 3

[0114] Figure 3 shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical imaging lens. Figure 4 shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0115] According to Figure 3 and Figure 4 it can be known that the optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0116] Embodiment 2

[0117] The difference from Embodiment 1 is that the parameters of the lens barrel P0 and the spacer elements are different.

[0118] As Figure 5 shown, the optical imaging lens of Embodiment 2 of the present application is described. For the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0119] The curvature radii, central thicknesses and other parameters of Lenses 1 to 7 of the optical imaging lens in Embodiment 2 and the distances between the lenses are the same as those shown in Table 2 and Table 3, but at least some of the parameters such as the thickness of the lens barrel P0, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as Figure 3 and Figure 4 shown.

[0120] Embodiment 3

[0121] The difference from Embodiment 1 is that the parameters of the lens barrel P0 and the spacer elements are different.

[0122] As Figure 6 shown, the optical imaging lens of Embodiment 3 of the present application is described. For the sake of brevity, some descriptions similar to those in Embodiment 1 will be omitted.

[0123] The curvature radii, central thicknesses and other parameters of Lenses 1 to 7 of the optical imaging lens in Embodiment 3 and the distances between the lenses are the same as those shown in Table 2 and Table 3, but at least some of the parameters such as the thickness of the lens barrel P0, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distance between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as Figure 3 and Figure 4 shown.

[0124] Embodiment 4

[0125] The difference from the first embodiment is that the parameters of the lens barrel P0, the spacer element, and the lens are different.

[0126] As Figures 7 to 9 shown, an optical imaging lens according to the fourth embodiment of the present application is described.

[0127] As Figure 7 shown, the optical imaging lens sequentially includes a spacer element APA, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a sixth lens E6, a sixth spacer P6, and a seventh lens E7 from the object side to the image side. Among them, a bearing portion extending toward the optical axis is provided on the inner wall surface of the lens barrel, and the bearing portion at least partially bears on the image side surface of the seventh lens. The first lens and the sixth lens are sequentially snap-fitted, the spacer element is disposed inside the snap-fitted structure, and the structural portions between adjacent lenses outside the snap-fitted structure bear on each other.

[0128] As Figure 7 shown, the object side surface of the first lens is S1, the image side surface of the first lens is S2, the object side surface of the second lens is S3, the image side surface of the second lens is S4, the object side surface of the third lens is S5, the image side surface of the third lens is S6, the object side surface of the fourth lens is S7, the image side surface of the fourth lens is S8, the object side surface of the fifth lens is S9, the image side surface of the fifth lens is S10, the object side surface of the sixth lens is S11, the image side surface of the sixth lens is S12, the object side surface of the seventh lens is S13, and the image side surface of the seventh lens is S14.

[0129] Table 4 shows the basic structural parameter table of the optical imaging lens according to the fourth embodiment, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm).

[0130] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Effective radius OBJ Spherical surface Infinity Infinity S1 Spherical surface 11.3595 0.2200 1.49 81.56 4.1755 S2 Spherical surface 3.5025 1.2138 2.7391 S3 Aspherical surface -2.4944 0.2200 1.54 56.11 2.5883 S4 Aspherical surface -5.3301 0.1942 1.8630 S5 Aspherical surface 3.5806 0.5646 1.67 19.24 1.7179 S6 Aspherical surface 16.1040 0.4251 1.5097 STO Spherical surface Infinity 0.1326 0.6755 S7 Aspherical surface -24.1363 0.3448 1.56 37.32 0.7674 S8 Aspherical surface -24.7866 0.1000 0.9730 S9 Aspherical surface 2.9581 1.3405 1.54 56.11 1.4006 S10 Aspherical surface -3.3285 0.0922 1.5585 S11 Aspherical surface 3.6357 0.8286 1.66 20.37 1.6920 S12 Aspherical surface -16656.5556 0.6921 2.2412 S13 Aspherical surface -1.2657 0.3577 1.64 23.53 2.3494 S14 Aspherical surface -1.9918 0.1237 2.5932 S15 Spherical surface Infinity 0.2100 1.52 64.20 6.0000 S16 Spherical surface Infinity 0.4400 6.0000 S17 Spherical surface Infinity 0.0000

[0131] Table 4

[0132] In Table 4, the object side surface S15 of the filter, the image side surface S16 of the filter, and the imaging surface S17 are also given.

[0133] In this embodiment, the second lens to the seventh lens are all aspherical lenses, and the surface profiles of the respective aspherical lenses can be defined by, but not limited to, the formula (1) in the first embodiment. Table 5 below gives the higher-order term coefficients of the respective aspherical mirror surfaces that can be used in this embodiment.

[0134]

[0135]

[0136] Table 5

[0137] Figure 8 Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical imaging lens. Figure 9 Shows the astigmatism curve of the optical imaging lens of Embodiment 4, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane.

[0138] According to Figure 8 and Figure 9 it can be known that the optical imaging lens given in Embodiment 4 can achieve good imaging quality.

[0139] Embodiment 5

[0140] The difference from Embodiment 4 is that the parameters of the lens barrel P0 and the spacer elements are different.

[0141] As Figure 10 shown, the optical imaging lens of Embodiment 5 of the present application is described. For the sake of brevity, some descriptions similar to those in Embodiment 4 will be omitted.

[0142] The curvature radii, central thicknesses and other parameters of the first to seventh lenses of the optical imaging lens in Embodiment 5 and the distances between the lenses are the same as those in Embodiment 4, as shown in Tables 4 and 5, but at least some of the parameters such as the thickness of the lens barrel P0, the thickness of the spacer element, the inner diameter and the outer diameter of the spacer element, and the distance between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as Figure 8 and Figure 9 shown.

[0143] As Figure 10 shown, each adjacent pair of lenses directly abuts against the spacer element, and the molding yield of the lens and the spacer element is higher, and the assembly is simpler.

[0144] Embodiment 6

[0145] The difference from Embodiment 4 is that the parameters of the lens barrel P0 and the spacer elements are different.

[0146] As Figure 11 shown, the optical imaging lens of Embodiment 6 of the present application is described. For the sake of brevity, some descriptions similar to those in Embodiment 4 will be omitted.

[0147] The curvature radii, central thicknesses and other parameters of the first to seventh lenses of the optical imaging lens in Embodiment 6 and the distances between the lenses are the same as those in Embodiment 4, as shown in Tables 4 and 5, but at least some of the parameters such as the thickness of the lens barrel P0, the thickness of the spacer element, the inner diameter and the outer diameter of the spacer element, and the distance between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as Figure 8 and Figure 9As shown

[0148] As Figure 11 shown, between every two adjacent lenses among the first six lenses, there is direct abutment with a spacer element, resulting in a higher molding yield for the lenses and the spacer element and a simpler assembly

[0149] Embodiment Seven

[0150] The difference from Embodiment One is that the parameters of the lens barrel P0, the spacer element, and the lenses are different

[0151] As Figures 12 to 14 shown, an optical imaging lens according to Embodiment Seven of the present application is described

[0152] As Figure 12 shown, the optical imaging lens sequentially includes, from the object side to the image side, a spacer element APA, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a sixth lens E6, a sixth spacer element P6, and a seventh lens E7. Among them, on the inner wall surface of the lens barrel, there is a abutting portion protruding towards the optical axis, and the abutting portion at least partially abuts on the image side surface of the seventh lens

[0153] As Figure 12 shown, the object side surface of the first lens is S1, the image side surface of the first lens is S2, the object side surface of the second lens is S3, the image side surface of the second lens is S4, the object side surface of the third lens is S5, the image side surface of the third lens is S6, the object side surface of the fourth lens is S7, the image side surface of the fourth lens is S8, the object side surface of the fifth lens is S9, the image side surface of the fifth lens is S10, the object side surface of the sixth lens is S11, the image side surface of the sixth lens is S12, the object side surface of the seventh lens is S13, and the image side surface of the seventh lens is S14

[0154] Table 6 shows the basic structural parameter table of the optical imaging lens of Embodiment Seven, where the units of the radius of curvature, thickness / distance, and effective radius are all millimeters (mm)

[0155]

[0156]

[0157] Table 6

[0158] In Table 6, the object side surface S15 of the filter, the image side surface S16 of the filter, and the imaging surface S17 are also given

[0159] In this embodiment, the second lens to the seventh lens are all aspherical lenses, and the surface profiles of the respective aspherical lenses can be defined by, but not limited to, formula (1) in Embodiment One. Table 7 below gives the higher-order term coefficients that can be used for the respective aspherical lens surfaces in this embodiment

[0160] Surface number A4 A6 A8 A10 A12 A14 A16 S3 -1.8895E-02 3.9864E-02 -2.0895E-02 6.3490E-03 -1.2223E-03 1.4977E-04 -1.1218E-05 S4 -1.3033E-01 4.6085E-01 -1.9896E+00 6.6548E+00 -1.5043E+01 2.3482E+01 -2.5915E+01 S5 -8.0166E-02 7.1594E-02 -2.0712E-02 -1.0717E-02 8.7249E-03 6.1334E-03 -8.1736E-03 S6 -3.2418E-02 1.2582E-01 -1.8440E-01 -1.5217E-01 1.6522E+00 -4.6153E+00 7.7671E+00 S7 -9.2276E-02 -5.6701E-01 7.8388E+00 -6.2915E+01 2.8876E+02 -7.9008E+02 1.2703E+03 S8 -2.4008E-01 4.0804E-01 -2.4746E+00 9.7523E+00 -2.5183E+01 4.0421E+01 -3.7154E+01 S9 -1.1328E-01 1.8754E-01 -5.1941E-01 1.0788E+00 -1.6666E+00 1.9028E+00 -1.5593E+00 S10 -3.5422E-01 9.5376E-01 -2.3110E+00 4.1161E+00 -5.4020E+00 4.7762E+00 -2.4171E+00 S11 -3.3548E-01 1.3023E+00 -5.7049E+00 1.9107E+01 -4.6319E+01 8.0186E+01 -9.9833E+01 S12 1.5946E-01 -4.1829E-01 6.0100E-01 -5.3889E-01 3.3406E-01 -1.5270E-01 5.3092E-02 S13 1.1056E+00 -2.1909E+00 2.1108E+00 -1.1549E+00 3.8494E-01 -7.7944E-02 8.5390E-03 S14 1.3434E+00 -2.2778E+00 2.2935E+00 -1.5612E+00 7.4706E-01 -2.5486E-01 6.2218E-02 Surface number A18 A20 A22 A24 A26 A28 A30 S3 4.5797E-07 -7.0736E-09 -1.7481E-11 -2.6864E-12 6.3234E-14 0.0000E+00 0.0000E+00 S4 2.0498E+01 -1.1656E+01 4.7227E+00 -1.3300E+00 2.4734E-01 -2.7313E-02 1.3564E-03 S5 2.9338E-03 -3.3944E-04 -1.2847E-05 2.8678E-06 0.0000E+00 0.0000E+00 0.0000E+00 S6 -8.9382E+00 7.2938E+00 -4.2297E+00 1.7062E+00 -4.5528E-01 7.2246E-02 -5.1633E-03 S7 -1.1065E+03 4.0231E+02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 1.5425E+01 6.9858E-01 -1.8782E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 8.9751E-01 -3.5441E-01 9.1798E-02 -1.4307E-02 1.2707E-03 -1.4134E-04 2.2735E-05 S10 2.0326E-01 6.5582E-01 -5.3547E-01 2.2613E-01 -5.8422E-02 8.8525E-03 -6.0905E-04 S11 8.9766E+01 -5.8140E+01 2.6810E+01 -8.5774E+00 1.8088E+00 -2.2610E-01 1.2693E-02 S12 -1.4169E-02 2.8902E-03 -4.4351E-04 4.9562E-05 -3.7962E-06 1.7714E-07 -3.7658E-09 S13 -2.1191E-04 -5.2351E-05 2.7312E-06 6.4226E-07 -9.8164E-08 6.0141E-09 -1.6884E-10 S14 -1.0817E-02 1.3201E-03 -1.1034E-04 6.1520E-06 -2.3300E-07 6.9423E-09 -1.5240E-10

[0161] Table 7

[0162] Figure 13 Fig. shows the axial chromatic aberration curve of the optical imaging lens of Embodiment VII, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical imaging lens. Figure 14 Fig. shows the astigmatism curve of the optical imaging lens of Embodiment VII, which represents the meridional image plane curvature and the sagittal image plane curvature.

[0163] According to Figure 13 and Figure 14 it can be seen that the optical imaging lens given in Embodiment VII can achieve good imaging quality.

[0164] Embodiment VIII

[0165] The difference from Embodiment VII is that the parameters of the lens barrel P0 and the spacer elements are different.

[0166] As Figure 15 shown, the optical imaging lens of Embodiment VIII of the present application is described. For the sake of brevity, some descriptions similar to those of Embodiment VII will be omitted.

[0167] The curvature radii, central thicknesses and other parameters of Lenses 1 to 7 of the optical imaging lens in Embodiment VIII and the distances between the lenses are the same as those in Embodiment VII, as shown in Table 6 and Table 7, but at least some of the parameters such as the thickness of the lens barrel P0, the thickness of the spacer elements, the inner diameter of the spacer elements, the outer diameter of the spacer elements and the distances between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens of this embodiment is as Figure 13 and Figure 14 shown.

[0168] As Figure 15 shown, two adjacent lenses are both snap-fitted, the spacer elements are arranged inside the snap-fitting structure, and the structural parts of the adjacent lenses outside the snap-fitting structure are directly abutted.

[0169] Embodiment IX

[0170] The difference from Embodiment VII is that the parameters of the lens barrel P0 and the spacer elements are different.

[0171] As Figure 16 shown, the optical imaging lens of Embodiment IX of the present application is described. For the sake of brevity, some descriptions similar to those of Embodiment VII will be omitted.

[0172] In Embodiment 9, the curvature radii, central thicknesses, and other parameters of Lenses 1 to 7 of the optical imaging lens are the same as those in Embodiment 7, and the distances between the lenses are also the same, as shown in Tables 6 and 7. However, at least some of the parameters such as the barrel P0, the thickness of the spacer element, the inner diameter of the spacer element, the outer diameter of the spacer element, and the distances between the spacer elements are different. Therefore, the imaging quality of the optical imaging lens in this embodiment is as Figure 13 and Figure 14 shown.

[0173] As Figure 16 shown, except between Lens 2 and Lens 3, the other lenses are snap-fitted together. The spacer element is arranged inside the snap-fitting structure, and the structural parts of the adjacent lenses outside the snap-fitting structure are directly abutted.

[0174] In summary, Embodiments 1 to 9 respectively satisfy the relationships shown in Table 8.

[0175]

[0176]

[0177] Table 8

[0178] Table 9 gives some parameters of the optical imaging lenses of Embodiments 1 to 9.

[0179] Parameter (mm) / Example 1 2 3 4 5 6 7 8 9 d0s 12.00 12.00 12.00 10.36 10.36 10.36 10.36 10.36 10.46 d0m 9.89 6.47 10.03 9.98 6.77 9.84 8.14 9.39 6.26 D1s 8.83 8.83 8.83 7.83 9.96 9.96 9.96 8.31 8.31 d2s 3.37 3.40 3.37 3.58 3.66 3.58 3.32 3.41 3.32 d3s 2.17 2.48 2.34 1.51 1.59 1.69 1.50 1.58 1.50 d3m 2.17 2.48 2.34 1.51 1.59 1.69 1.50 1.58 1.50 D3m 8.03 7.79 8.03 6.66 9.16 9.16 9.16 6.27 6.24 D4s 7.79 7.79 7.79 6.30 8.76 8.76 8.76 6.27 6.27 d5s 3.05 3.17 3.05 3.30 3.47 3.49 3.06 3.08 3.06 D5s 7.79 7.79 7.79 6.02 8.56 8.56 8.56 6.27 6.27 d6s 4.75 4.77 4.75 4.67 4.68 4.67 4.79 4.81 4.79 d6m 4.75 4.77 4.75 4.67 4.68 4.67 4.79 4.81 4.79 D6m 7.51 7.51 7.51 8.16 8.16 6.09 8.16 6.27 6.27 dAs 10.44 10.19 10.36 9.85 9.85 9.19 9.85 9.85 9.71 dAm 8.06 7.83 8.06 9.40 9.40 9.40 9.40 9.31 9.35 L 8.35 7.32 7.83 7.64 7.03 7.68 7.63 7.31 7.03 EP01 1.53 1.53 1.53 1.86 1.86 1.86 1.50 1.50 1.50 EP34 0.70 0.70 0.70 0.39 0.39 0.39 0.45 0.45 0.45 EP45 0.84 0.84 0.84 0.81 0.81 0.81 0.58 0.58 0.58 EP56 1.43 1.43 1.43 1.73 1.73 1.73 1.99 1.99 1.99 EP60 2.00 0.97 1.48 1.51 0.91 1.55 1.50 1.17 0.89 CP1 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CP2 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CP3 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CP4 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CP5 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CP6 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 CPA 1.01 1.01 1.01 0.75 0.75 0.75 0.75 0.75 0.75

[0180] Table 9

[0181] Table 10 gives some optical parameters of Lenses 1 to 7 of the optical imaging lenses of Embodiments 1 to 9.

[0182]

[0183]

[0184] Table 10

[0185] This application also provides an imaging device, and its electronic photosensitive element can be a charge-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 on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0186] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0187] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0188] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0189] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that, Including: A lens group, which sequentially includes lens 1 to lens 7 arranged at intervals from the object side to the image side of the optical imaging lens. The optical powers of lens 1, lens 2, and lens 7 are negative, and the optical powers of lens 3, lens 5, and lens 6 are positive; A plurality of spacer elements, which at least include spacer element 1 located on the image side of lens 1 and at least partially in contact with the image side surface of lens 1, and spacer element 6 located on the image side of lens 6 and at least partially in contact with lens 6; A lens barrel for accommodating the lens group and the plurality of spacer elements; Wherein, the inner diameter d0s of the object-side end face of the lens barrel and the inner diameter d0m of the image-side end face of the lens barrel satisfy: 1 < d0s / d0m < 2; The maximum half field of view Semi-FOV of the optical imaging lens and the F number FNO of the optical imaging lens satisfy: -3 < tan(Semi-FOV) / FNO < -2; The inner diameter d1s of the object-side surface of spacer element 1, the effective focal length f1 of lens 1, the inner diameter d6s of the object-side surface of spacer element 6, and the effective focal length f7 of lens 7 satisfy: -2 < d1s / f1 + d6s / f7 < 0; 2. The optical imaging lens according to claim 1, characterized in that, The plurality of spacer elements further include spacer element 3 located on the image side of lens 3 and at least partially in contact with the image side surface of lens 3. The inner diameter of spacer element 3 is the smallest among the inner diameters of all the spacer elements of the plurality of spacer elements. The outer diameter D3m of the image-side surface of spacer element 3, the inner diameter d3m of the image-side surface of spacer element 3, the effective focal length f3 of lens 3, and the effective focal length f4 of lens 4 satisfy: -1 < (D3m - d3m) / (f3 - f4) < 0.1; 3. The optical imaging lens according to claim 1, characterized in that, Lens 1 is a meniscus lens. The object-side surface of lens 1 is convex, and the image-side surface of lens 1 is concave. The inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D1s of the object-side surface of spacer element 1, the curvature radius R1 of the object-side surface of lens 1, and the curvature radius R2 of the image-side surface of lens 1 satisfy: 0 < (d0s - D1s) / (R1 - R2) < 0.7; 4. The optical imaging lens according to claim 1, characterized in that, The on-axis distance T12 between lens 1 and lens 2, the central thickness CT1 of lens 1, and the central thickness CT2 of lens 2 satisfy: 1.5 < T12 / (CT1 + CT2) < 3. The outer diameter D1s of the object-side surface of spacer element 1, the curvature radius R2 of the image-side surface of lens 1, and the curvature radius R3 of the object-side surface of lens 2 satisfy: -1 < D1s / (R2 - R3) < 2; 5. The optical imaging lens according to claim 1, characterized in that, The multiple spacer elements further include a second spacer element located 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 third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The following relationship is satisfied among the inner diameter d2s of the object side surface of the second spacer element, the inner diameter d3s of the object side surface of the third spacer element, the effective focal length f2 of the second lens, and the effective focal length f3 of the third lens: -3 < (d2s + d3s) / (f2 + f3) < 8.

6. The optical imaging lens according to claim 1, characterized in that, The multiple spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens. The following relationship is satisfied between the outer diameter D3m and the inner diameter d3m of the image side surface of the third spacer element: 4 mm < D3m - d3m < 8 mm. The following relationship is satisfied among the inner diameter d3s of the object side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, the effective focal length f3 of the third lens, and the effective focal length f4 of the fourth lens: 0 < d3s / f3 + d3m / f4 < 1.

7. The optical imaging lens according to claim 1, characterized in that, The multiple spacer elements further include a third spacer element located on the image side of the third lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens. The following relationship is satisfied between the distance EP34 along the optical axis direction from the image side surface of the third spacer element to the object side surface of the fourth spacer element and the central thickness CT4 of the fourth lens: 1 < EP34 / CT4 < 2. The following relationship is satisfied among the outer diameter D3m of the object side surface of the third spacer element, the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, and the outer diameter D4s of the object side surface of the fourth spacer element: -1 < D3m / R7 - D4s / R8 < 1.

8. The optical imaging lens according to claim 1, characterized in that, The multiple spacer elements further include a fourth spacer element located on the image side of the fourth lens and at least partially in contact with the image side surface of the fourth lens, and a fifth spacer element located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The following relationship is satisfied among the distance EP56 along the optical axis direction from the image side surface of the fifth spacer element to the object side surface of the sixth lens, the central thickness CT6 of the sixth lens, the distance EP45 along the optical axis direction from the image side surface of the fourth spacer element to the object side surface of the fifth lens, and the central thickness CT5 of the fifth lens: 0.5 < EP56 / CT6 - EP45 / CT5 < 1.

5.

9. The optical imaging lens according to claim 1, characterized in that, The multiple spacer elements further include a fifth spacer element located on the image side of the fifth lens and at least partially in contact with the image side surface of the fifth lens. The following relationship is satisfied among the outer diameter D5s and the inner diameter d5s of the object side surface of the fifth spacer element, the curvature radius R10 of the image side surface of the fifth lens, and the curvature radius R11 of the object side surface of the sixth lens: -5 < (D5s - d5s) / (R10 + R11) < 20.

10. The optical imaging lens according to claim 1, characterized in that, The inner diameter d6s of the object side surface of the spacer element six, the effective focal length f6 of the lens six, and the effective focal length f7 of the lens seven satisfy: -4 < d6s / (f6 + f7) < 0.

Images