Optical imaging lens

Abstract

The application discloses an optical imaging lens, comprising: a lens barrel and a lens group and a spacer element group assembled in the lens barrel; the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from an object side to an image side along an optical axis, wherein the first lens, the second lens and the fifth lens have positive refractive power, and the third lens, the fourth lens and the sixth lens have negative refractive power; the spacer element group comprises a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens, and an object side surface of the fifth spacer element is partially in contact with the fifth lens; wherein an outer diameter D0m of an image side end surface of the lens barrel, an outer diameter D0s of an object side end surface of the lens barrel, a maximum field of view FOV of the optical imaging lens and an inner diameter d5m of an image side surface of the fifth spacer element satisfy: 6<(D0m+D0s) / (Tan(FOV / 4)*d5m)<11.

Description

Technical Field

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

[0002] With the rapid development of portable electronic products such as smartphones, higher requirements have been placed on optical imaging lenses used in these products. For example, optical imaging lenses need to meet both imaging quality and small-size assembly stability requirements.

[0003] Existing optical imaging lenses used in portable electronic products such as smartphones typically consist of multiple lens elements, such as six elements. Size limitations increase the difficulty of designing these lenses. When the lens elements and barrel design are not properly optimized, problems such as poor optical transmission and insufficient mounting surface for assembling with portable electronic products can easily occur, thus affecting the final image quality and assembly stability of the optical imaging lens. Summary of the Invention

[0004] This application provides an optical imaging lens, comprising: a lens group including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side, wherein the first lens, the second lens, and the fifth lens have positive optical power, and the third lens, the fourth lens, and the sixth lens have negative optical power; a spacer element group including a fifth spacer element located between the fifth lens and the sixth lens, and the object side surface of the fifth spacer element partially abutting against the fifth lens; and a lens barrel, wherein the lens group and the spacer element group are assembled in the lens barrel; wherein the outer diameter D0m of the image side end face of the lens barrel, the outer diameter D0s of the object side end face of the lens barrel, the maximum field of view FOV of the optical imaging lens, and the inner diameter d5m of the image side surface of the fifth spacer element satisfy: 6 < (D0m + D0s) / (Tan(FOV / 4) * d5m) < 11.

[0005] In one embodiment, the effective focal length f6 of the sixth lens, the maximum thickness CP5 of the fifth spacer element along the optical axis, the center thickness CT6 of the sixth lens on the optical axis, the air gap T56 between the fifth and sixth lenses on the optical axis, and the outer diameter D5m of the image-side surface of the fifth spacer element satisfy: -22mm <f6 / (CP5+CT6-T56)*D5m<-8mm。

[0006] In one embodiment, the spacer group further includes a fourth spacer element located between the fourth lens and the fifth lens, and the object-side surface of the fourth spacer element partially abuts against the fourth lens; wherein the outer diameter D4m of the image-side surface of the fourth spacer element, the outer diameter D5s of the object-side surface of the fifth spacer element, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: -6<(D4m+D5s) / (R9+R10)<0.

[0007] In one embodiment, the inner diameter d0m of the image-side end face of the lens barrel, the inner diameter d5s of the object-side end face of the fifth spacer element, the entrance pupil diameter EPD of the optical imaging lens, and the effective focal length f of the optical imaging lens satisfy: 2<(d0m-d5s) / EPD*(d0m / f)<7.

[0008] In one embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, and the spacing EP45 between the fourth and fifth spacers along the optical axis satisfy: -10<(f4+f5) / (V4+V5) / EP45<0.

[0009] In one embodiment, the spacer group further includes a third spacer element located between the third lens and the fourth lens, and the object side of the third spacer element abuts against the third lens portion; wherein the effective focal length f3 of the third lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, and the spacing EP34 between the third spacer element and the fourth spacer element along the optical axis satisfy: -47 < f3*(N3+N4) / EP34 < -22.

[0010] In one embodiment, the outer diameter D3m of the image side of the third spacer element, the radius of curvature R5 of the object side of the third lens, the radius of curvature R7 of the object side of the fourth lens, and the outer diameter D4s of the object side of the fourth spacer element satisfy: -7<(D3m*R5) / (D4s*R7)<3.

[0011] In one embodiment, the inner diameter d3m of the image side of the third spacer element, the outer diameter D3s of the object side of the third spacer element, the air gap T34 between the third lens and the fourth lens on the optical axis, and the radius of curvature R8 of the image side of the fourth lens satisfy: -4<(d3m*D3s) / (T34*R8)<14.

[0012] In one embodiment, the spacer group further includes a second spacer element located between the second lens and the third lens, and the object side of the second spacer element abuts against the second lens portion; wherein the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the maximum thickness CP2 of the second spacer element along the optical axis, the spacing EP23 between the second spacer element and the third spacer element along the optical axis, and the maximum thickness CP3 of the third spacer element along the optical axis satisfy: -4 < (f2 + f3) / (CP2 + EP23 + CP3) < 0.

[0013] In one embodiment, the radius of curvature R3 of the object side of the second lens, the radius of curvature R4 of the image side of the second lens, the inner diameter d3s of the object side of the third spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy: 0 < (R3 + R4) / (d3s - d2s) < 8.

[0014] In one embodiment, the spacer element group further includes a first spacer element located between the first lens and the second lens, and the object-side surface of the first spacer element abuts against the first lens portion; wherein, the effective focal length f of the optical imaging lens, the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, and the distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer element along the optical axis satisfy: 30 <f*(d0s+D0s) / EP01<43。

[0015] In one embodiment, the radius of curvature R3 of the object-side surface of the second lens, the inner diameter d2s of the object-side surface of the second spacer element, the inner diameter d1m of the image-side surface of the first spacer element, and the distance EP12 between the first spacer element and the second spacer element along the optical axis satisfy: 0mm <R3*(d2s-d1m) / EP12<5mm。

[0016] In one embodiment, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R6 of the image-side surface of the third lens, the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, the distance EP12 between the first spacer element and the second spacer element along the optical axis, and the distance EP23 between the second spacer element and the third spacer element along the optical axis satisfy: 18 < (R2 + R6) * (V1 - V3) / (EP12 + EP23) < 37.

[0017] In one embodiment, the radius of curvature R1 of the object side of the first lens, the radius of curvature R2 of the image side of the first lens, the outer diameter D1s of the object side of the first spacer element, and the inner diameter d1s of the object side of the first spacer element satisfy: 5 < (R1*R2) / (D1s*d1s) < 12.

[0018] In one embodiment, the outer diameter D5m of the image-side surface of the fifth spacer element, the edge thickness ET6 at the maximum effective half-aperture of the sixth lens, and the center thickness CT6 of the sixth lens on the optical axis satisfy: 1mm <D5m / (ET6 / CT6)<5mm。

[0019] The optical imaging lens of this application, through the reasonable configuration of the optical power of each lens, allows light to be refracted and converged sequentially by each lens before finally converging on the imaging surface to form an image. By setting a fifth spacer element and controlling the relationship between the outer diameter of the image-side end face of the lens barrel, the outer diameter of the object-side end face of the lens barrel, the maximum field of view of the optical imaging lens, and the inner diameter of the image-side side of the fifth spacer element, it is ensured that 6 < (D0m + D0s) / (Tan(FOV / 4) * d5m) < 11. This ensures that the outer diameter of the object-side end face of the lens barrel meets the assembly requirements and that the aperture sharp corner of the lens barrel does not block light. This also ensures that the width of the annular plane of the object-side end face of the lens barrel is not too small. The fifth spacer element can reasonably control the inner and outer diameters and the step height of the object-side end face and the image-side end face of the lens barrel, thereby effectively ensuring the final imaging quality and assembly stability of the optical imaging lens. Attached Figure Description

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

[0021] Figure 1 A schematic diagram of the structure of an optical imaging lens according to an exemplary embodiment of this application is shown;

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

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

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

[0025] Figures 5A to 5G The on-axis chromatic aberration curves, distortion curves, astigmatism curves, and magnification chromatic aberration curves of the optical imaging lenses of Examples 1-3 are shown respectively in the visible light band and the infrared band.

[0026] Figure 6 A schematic diagram of the structure of an optical imaging lens according to Embodiment 4 of this application is shown;

[0027] Figure 7 A schematic diagram of the structure of an optical imaging lens according to Embodiment 5 of this application is shown;

[0028] Figure 8 A schematic diagram of the structure of an optical imaging lens according to Embodiment 6 of this application is shown;

[0029] Figures 9A to 9G The on-axis chromatic aberration curves, distortion curves, astigmatism curves, and magnification chromatic aberration curves of the optical imaging lenses of Examples 4-6 are shown respectively in the visible light band and the infrared band.

[0030] Figure 10 A schematic diagram of the structure of an optical imaging lens according to Embodiment 7 of this application is shown;

[0031] Figure 11 A schematic diagram of the structure of an optical imaging lens according to Embodiment 8 of this application is shown;

[0032] Figure 12 A schematic diagram of the structure of an optical imaging lens according to Embodiment 9 of this application is shown;

[0033] Figures 13A to 13G The on-axis chromatic aberration curves, distortion curves, astigmatism curves, and magnification chromatic aberration curves of the optical imaging lenses of Examples 7-9 are shown respectively in the visible light band and the infrared band.

[0034] Figures 14 to 16 An equivalent force diagram of an optical imaging lens is shown. Detailed Implementation

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

[0036] It should be noted that in this specification, the terms "first," "second," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first optical system discussed below may also be referred to as the second optical system, and the second optical system may also be referred to as the first optical system.

[0037] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.

[0038] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region.

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

[0040] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] The features, principles and other aspects of this application are described in detail below.

[0043] A first aspect of the present application provides an optical imaging lens, which may include a lens barrel and a six-piece lens group assembled in the lens barrel. The six-piece lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the six lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens, the second lens, and the fifth lens have positive optical powers, and the third lens, the fourth lens, and the sixth lens have negative optical powers. The optical imaging lens may further include a spacer element group assembled in the lens barrel. The spacer element group at least includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens, and the object side surface of the fifth spacer element partially abuts against the fifth lens.

[0044] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 6 < (D0m + D0s) / (Tan(FOV / 4) * d5m) < 11, where D0m is the outer diameter of the image-side end surface of the lens barrel, D0s is the outer diameter of the object-side end surface of the lens barrel, FOV is the maximum field angle of the optical imaging lens, and d5m is the inner diameter of the image-side surface of the fifth spacer element. By reasonably configuring the optical power of each lens, the light rays pass through the refraction and cross-convergence of each lens in sequence and finally converge and form an image on the imaging surface. By setting the fifth spacer element and controlling the relationship between the outer diameter of the image-side end surface of the lens barrel, the outer diameter of the object-side end surface of the lens barrel, the maximum field angle of the optical imaging lens, and the inner diameter of the image-side surface of the fifth spacer element to satisfy 6 < (D0m + D0s) / (Tan(FOV / 4) * d5m) < 11, it can not only make the outer diameter of the object-side end surface of the lens barrel meet the assembly requirements, but also ensure that the light is not intercepted by the light-stop sharp corners of the lens barrel, thereby ensuring that the width of the annular plane of the object-side end surface of the lens barrel is not too small. The fifth spacer element can reasonably control the inner and outer diameters and the step height between the object-side end surface and the image-side end surface of the lens barrel, thereby effectively ensuring the final imaging quality and assembly stability of the optical imaging lens.

[0045] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula -22mm < f6 / (CP5 + CT6 - T56) * D5m < -8mm, where f6 is the effective focal length of the sixth lens, CP5 is the maximum thickness of the fifth spacer element along the optical axis, CT6 is the central thickness of the sixth lens on the optical axis, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, and D5m is the outer diameter of the image-side surface of the fifth spacer element. By reasonably controlling the central thickness of the sixth lens, it can ensure that the lens has good processing feasibility. By adding a fifth spacer element between the fifth lens and the sixth lens, it can effectively intercept the stray light on both sides of the fifth lens and the sixth lens, effectively ensure the accuracy of the abutting position between the lenses after assembly, and make the optical parameters of the lens meet the design requirements, thereby ensuring the imaging quality of the lens.

[0046] In an exemplary embodiment, the spacer element group of the optical imaging lens of this application may further include a fourth spacer element, which is located between the fourth lens and the fifth lens, and the object-side surface of the fourth spacer element abuts against the fourth lens. The optical imaging lens of this application can satisfy the condition -6<(D4m+D5s) / (R9+R10)<0, where D4m is the outer diameter of the image-side surface of the fourth spacer element, D5s is the outer diameter of the object-side surface of the fifth spacer element, R9 is the radius of curvature of the object-side surface of the fifth lens, and R10 is the radius of curvature of the image-side surface of the fifth lens. By connecting the fourth lens and the fifth lens through the fourth spacer element, excess light can be blocked. By controlling the thickness of the spacer element to control the field curvature of the optical imaging lens, problems such as stray light and light leakage can be prevented, which is beneficial to improving image quality and ensuring better imaging effect. The radius of curvature of the fifth lens can effectively control the surface shape of the object-side and image-side surfaces of the lens, reduce the sensitivity of the lens, and improve the performance of the lens and the stray light state.

[0047] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition 2 < (d0m - d5s) / EPD * (d0m / f) < 7, where d0m is the inner diameter of the image-side surface of the lens barrel, d5s is the inner diameter of the object-side surface of the fifth spacer element, EPD is the entrance pupil diameter of the optical imaging lens, and f is the effective focal length of the optical imaging lens. Controlling this condition within a reasonable range helps to compress the overall length of the lens, achieving lens miniaturization. Simultaneously, it avoids the problem of increased lens tolerance sensitivity caused by excessive concentration of optical power. By controlling the inner diameter of the object-side surface of the fifth spacer element, excess light from the edge of the field of view can be intercepted, preventing stray light, light leakage, and other problems, thereby improving image quality.

[0048] In an exemplary embodiment, the optical imaging lens of this application satisfies the condition -10 < (f4 + f5) / (V4 + V5) / EP45 < 0, where f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, V4 is the Abbe number of the fourth lens, V5 is the Abbe number of the fifth lens, and EP45 is the distance between the fourth and fifth spacer elements along the optical axis. By controlling the combination of lenses with different Abbe number materials, it is beneficial to balance chromatic aberration and improve image quality. By reasonably controlling the distance between the fourth and fifth spacer elements, it is beneficial to control the convergence of light, making it perfectly matched with the receiver. At the same time, it can make the edge thickness of the lens more uniform, meeting the lens forming and strength requirements.

[0049] In an exemplary embodiment, the spacer element group of the optical imaging lens of this application may further include a third spacer element, which is located between the third lens and the fourth lens, and the object-side surface of the third spacer element abuts against the third lens portion. The optical imaging lens of this application can satisfy the condition -47 < f3 * (N3 + N4) / EP34 < -22, where f3 is the effective focal length of the third lens, N3 is the refractive index of the third lens, N4 is the refractive index of the fourth lens, and EP34 is the spacing between the third spacer element and the fourth spacer element along the optical axis. By controlling the position of the inner diameter of the image-side surface of the third spacer element and the object-side surface of the fourth spacer element along the path of light, the interception of light emitted from the third lens by the third spacer element can be controlled. Under the condition of ensuring lens illumination, the more light is intercepted, the higher the image quality of the lens. At the same time, the air gap between the third lens and the fourth lens on the optical axis is beneficial to controlling the thickness of the fourth lens, ensuring the lens forming requirements.

[0050] In an exemplary embodiment, the optical imaging lens of this application satisfies the condition -7 < (D3m*R5) / (D4s*R7) < 3, where D3m is the outer diameter of the image side of the third spacer element, R5 is the radius of curvature of the object side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, and D4s is the outer diameter of the object side of the fourth spacer element. By reasonably allocating the radii of curvature of the third and fourth lenses, the chromatic aberration of the lens can be effectively balanced, and the sensitivity of the two lenses can be reduced. In addition, by reasonably allocating the radii of curvature, it is also beneficial to avoid the problem of surface shaping difficulties in actual processing caused by excessive tilt angle. By reasonably controlling the outer diameters of the third and fourth spacer elements, it is beneficial to block stray light and avoid stray light risks.

[0051] In an exemplary embodiment, the optical imaging lens of this application can satisfy the condition -4 < (d3m * D3s) / (T34 * R8) < 14, where d3m is the inner diameter of the image-side surface of the third spacer element, D3s is the outer diameter of the object-side surface of the third spacer element, T34 is the air gap between the third lens and the fourth lens on the optical axis, and R8 is the radius of curvature of the image-side surface of the fourth lens. By reasonably controlling the radius of curvature of the fourth lens and the inner diameters of the front and rear spacer elements, it is helpful to control the shape of the spacer elements and improve the effect of stray light, improve the stability of lens assembly, reduce the transmission of some non-imaging light caused by penetrating light between lenses, and help improve the stray light of the lens and improve the imaging quality of the lens.

[0052] In an exemplary embodiment, the spacer element group of the optical imaging lens of the present application may further include a second spacer element located between the second lens and the third lens, and the object side surface of the second spacer element partially abuts against the second lens. The optical imaging lens of the present application may satisfy the conditional formula -4 < (f2 + f3) / (CP2 + EP23 + CP3) < 0, where f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, CP2 is the maximum thickness of the second spacer element along the optical axis, EP23 is the interval between the second spacer element and the third spacer element along the optical axis, and CP3 is the maximum thickness of the third spacer element along the optical axis. By reasonably regulating the focal lengths of the second lens and the third lens and the thickness of the spacer element, the deflection angle of light rays in the second lens and the third lens can be effectively reduced, the ghost image energy between the two lenses can be reduced, and the optical distortion can be preferably reduced, and the field curvature of the lens can be balanced. At the same time, the thickness of the second spacer element can reasonably distribute the edge thicknesses of the second lens and the third lens, facilitating meeting the requirements of lens processing and shaping, and making its surface shape smoother.

[0053] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional formula 0 < (R3 + R4) / (d3s - d2s) < 8, where R3 is the curvature radius of the object side surface of the second lens, R4 is the curvature radius of the image side surface of the second lens, d3s is the inner diameter of the object side surface of the third spacer element, and d2s is the inner diameter of the object side surface of the second spacer element. By reasonably controlling the curvature radius of the second lens, the edge thickness of the lens can be controlled, ensuring good processing feasibility of the lens, and effectively ensuring the accuracy of the abutting position between the lenses after assembly, so that the optical parameters of the lens meet the design requirements. The second spacer element and the third spacer element can effectively intercept the stray light on both side surfaces of the second lens, ensuring the imaging quality of the lens.

[0054] In an exemplary embodiment, the spacer element group of the optical imaging lens of the present application may further include a first spacer element located between the first lens and the second lens, and the object side surface of the first spacer element partially abuts against the first lens. The optical imaging lens of the present application may satisfy the conditional formula 30 < f * (d0s + D0s) / EP01 < 43, where f is the effective focal length of the optical imaging lens, d0s is the inner diameter of the object side end face of the lens barrel, D0s is the outer diameter of the object side end face of the lens barrel, and EP01 is the interval between the object side end face of the lens barrel and the object side surface of the first spacer element along the optical axis. By reasonably controlling the inner and outer diameter dimensions of the object side end face of the lens barrel, the stability of lens assembly abutment can be effectively ensured. The outer diameter of the object side end face of the lens barrel is mainly controlled by the size of the module window and the assembly abutment area. These dimensions jointly affect the overall appearance style of the lens. Under the condition that the effective aperture of the lens is fixed, the better the thickness uniformity of the lens barrel wall, the more stable the reliability of the lens.

[0055] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 0mm < R3*(d2s - d1m) / EP12 < 5mm, where R3 is the radius of curvature of the object side of the second lens, d2s is the inner diameter of the object side of the second spacer element, d1m is the inner diameter of the image side of the first spacer element, and EP12 is the spacing between the first spacer element and the second spacer element along the optical axis. By reasonably controlling the inner diameter of the image side of the first spacer element and the inner diameter of the object side of the second spacer element, it helps to improve stray light, reduce the transmission of some non-imaging light caused by penetrating light between lenses, and improve the imaging quality of the lens. By controlling this conditional formula within a reasonable range, it helps to ensure that the inner diameter of the object side of the second spacer element is close to the optical outer diameter of the image side of the first lens, and the inner diameter of the image side of the first spacer element is close to the optical outer diameter of the object side of the second lens, thereby improving the effect of intercepting light at this position.

[0056] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 18 < (R2 + R6)*(V1 - V3) / (EP12 + EP23) < 37, where R2 is the radius of curvature of the image side of the first lens, R6 is the radius of curvature of the image side of the third lens, V1 is the Abbe number of the first lens, V3 is the Abbe number of the third lens, EP12 is the spacing between the first spacer element and the second spacer element along the optical axis, and EP23 is the spacing between the second spacer element and the third spacer element along the optical axis. By reasonably controlling the radius of curvature of the image side of the first lens and the radius of curvature of the image side of the third lens within a certain range, the aberrations generated by the optical imaging lens in the first lens, second lens, and third lens can be effectively controlled. By controlling the combination of lenses made of materials with different Abbe numbers, it is beneficial to balance chromatic aberration and improve imaging quality. By controlling the distances between the first spacer element, the second spacer element, and the third spacer element, it is beneficial to control the convergence of light and improve the imaging quality of the lens.

[0057] In an exemplary embodiment, the optical imaging lens of the present application can satisfy the conditional formula 5 < (R1*R2) / (D1s*d1s) < 12, where R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, D1s is the outer diameter of the object side of the first spacer element, and d1s is the inner diameter of the object side of the first spacer element. By controlling the radius of curvature of the object side and the image side of the first lens, the light angle of the edge field of view can be within a reasonable range, effectively reducing the sensitivity of the lens. By controlling the inner and outer diameters of the first spacer element, the entry of excess stray light can be reduced, improving the stray light phenomenon of the optical imaging lens. In addition, the edge thickness of the lens can be controlled to suppress the increase of the internal reflection path in the lens, which is beneficial to improving and enhancing the shooting effect of the lens.

[0058] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition 1 mm < D5m / (ET6 / CT6) < 5 mm, where D5m is the outer diameter of the image side surface of the fifth spacer element, ET6 is the edge thickness at the maximum effective semi-aperture of the sixth lens, and CT6 is the central thickness of the sixth lens on the optical axis. By controlling this condition within a reasonable range, it helps to improve the strength of the sixth lens, increase the lens dispensing area, improve the stability of the assembly of the sixth lens and the fifth spacer element, and improve the problem of low yield caused by the fitting amount among the fifth lens, the sixth lens and the fifth spacer element. By controlling the edge thickness and the central thickness on the optical axis of the sixth lens, it helps to improve the stray light effect of the fifth spacer element, thereby improving the imaging quality of the lens.

[0059] In an exemplary embodiment, the optical imaging lens may further include an aperture stop, which can be set at an appropriate position according to actual needs. For example, the aperture stop may be located between the first lens and the second lens. The aperture stop can restrict the light path and control the light intensity.

[0060] According to the optical imaging lens of the above embodiment of the present application, by reasonably allocating the parameters of each lens and spacer element, the outer diameter of the object-side end face of the lens barrel can meet the assembly requirements, and the light aperture sharp corners of the lens barrel can be ensured not to intercept light, so as to ensure that the width of the annular plane of the object-side end face of the lens barrel is not too small. The fifth spacer element can reasonably control the inner and outer diameters and the step height between the object-side end face and the image-side end face of the lens barrel, thereby effectively ensuring the final imaging quality and assembly stability of the optical imaging lens.

[0061] In an embodiment of the present application, at least one of the lens surfaces of the first lens to the sixth lens is an aspherical lens surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0062] Those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses and spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0063] A second aspect of the present application provides an optical imaging lens, which may include a lens barrel and a six-lens group assembled in the lens barrel. The six-lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, and the six lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens, the second lens and the fifth lens have positive optical powers, and the third lens, the fourth lens and the sixth lens have negative optical powers. The optical imaging lens may further include a spacer element group assembled in the lens barrel. The spacer element group at least includes a first spacer element. The first spacer element is located between the first lens and the second lens, and the object side surface of the first spacer element partially abuts against the first lens.

[0064] In an exemplary embodiment, the optical imaging lens of the present application may satisfy the condition 30 < f*(d0s + D0s) / EP01 < 43, where f is the effective focal length of the optical imaging lens, d0s is the inner diameter of the object side end face of the lens barrel, D0s is the outer diameter of the object side end face of the lens barrel, and EP01 is the distance along the optical axis between the object side end face of the lens barrel and the object side surface of the first spacer element. By reasonably configuring the optical powers of each lens, the light rays pass through the refraction and cross-convergence of each lens in sequence and finally converge to form an image on the imaging surface. By setting the first spacer element and controlling the relationship among the effective focal length of the optical imaging lens, the inner diameter of the object side end face of the lens barrel, the outer diameter of the object side end face of the lens barrel, and the distance along the optical axis between the object side end face of the lens barrel and the object side surface of the first spacer element, so that it satisfies 30 < f*(d0s + D0s) / EP01 < 43, the size of the window opening and the assembly abutting area of the lens can meet the requirements, ensuring the overall appearance style of the lens. Under the condition that the effective aperture of the lens is fixed, the wall thickness of the lens barrel has better uniformity, thereby effectively ensuring the final imaging quality and assembly stability of the optical imaging lens.

[0065] A third aspect of the present application provides an optical imaging lens, which may include a lens barrel and a six-lens group assembled in the lens barrel. The six-lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, and the six lenses are arranged in sequence from the object side to the image side along the optical axis. Among them, the first lens, the second lens and the fifth lens have positive optical powers, and the third lens, the fourth lens and the sixth lens have negative optical powers. The optical imaging lens may further include a spacer element group assembled in the lens barrel. The spacer element group at least includes a third spacer element. The third spacer element is located between the third lens and the fourth lens, and the object side surface of the third spacer element partially abuts against the third lens.

[0066] In an exemplary embodiment, the optical imaging lens of this application satisfies the condition -4 < (d3m * D3s) / (T34 * R8) < 14, where d3m is the inner diameter of the image-side surface of the third spacer element, D3s is the outer diameter of the object-side surface of the third spacer element, T34 is the air gap between the third lens and the fourth lens on the optical axis, and R8 is the radius of curvature of the image-side surface of the fourth lens. By reasonably configuring the optical power of each lens, the light rays are refracted and converged sequentially through each lens before finally converging at the imaging plane to form an image. By setting the third spacer element and controlling the inner diameter of the image side of the third spacer element, the outer diameter of the object side of the third spacer element, the air gap between the third lens and the fourth lens on the optical axis, and the radius of curvature of the image side of the fourth lens, so that they satisfy -4<(d3m*D3s) / (T34*R8)<14, it helps to control the shape of the spacer element and improve the effect of stray light, improve the stability of lens assembly, reduce the transmission of some non-imaging light caused by the transmission of light between lenses, and help improve the stray light of the lens and improve the imaging quality of the lens.

[0067] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical imaging lens applicable to the above-described embodiments.

[0068] Example 1

[0069] The following is for reference Figure 2 Example 1 of the optical imaging lens according to this application is described. Figure 2 A schematic diagram of the structure of an optical imaging lens 110 according to Embodiment 1 of this application is shown.

[0070] like Figure 2 As shown, the optical imaging lens 110 includes a lens barrel P0 and a six-element lens group and a spacer element group assembled in the lens barrel P0. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The aperture stop STO can be set between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0071] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0072] In this embodiment, the first spacer element P1 is located between the first lens E1 and the second lens E2, and its object-side surface partially abuts against the first lens E1. The second spacer element P2 is located between the second lens E2 and the third lens E3, and its object-side surface partially abuts against the second lens E2. The third spacer element P3 is located between the third lens E3 and the fourth lens E4, and its object-side surface partially abuts against the third lens E3. The fourth spacer element P4 is located between the fourth lens E4 and the fifth lens E5, and its object-side surface partially abuts against the fourth lens E4. The fifth spacer element P5 is located between the fifth lens E5 and the sixth lens E6, and its object-side surface partially abuts against the fifth lens E5. The spacer elements can block excess external light from entering, allowing the lens and lens barrel P0 to better abut against each other, thus enhancing the structural stability of the optical imaging lens 110.

[0073] Table 1 shows the basic parameters of the optical imaging lens 110 of Embodiment 1, where the units for radius of curvature and thickness are millimeters (mm).

[0074]

[0075]

[0076] Table 1

[0077] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the sixth lens E6 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0078]

[0079] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 2-1 and 2-2 below give the higher-order coefficients A4, A6, A8, A1, A2, A3, A4, A5, A6, A8, A1 ...10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 .

[0080] Number of surfaces and coefficients A4 A6 A8 A10 A12 A14 A16 S1 -1.1004E-01 1.0662E-02 1.1221E-03 -4.9350E-05 -6.3074E-05 5.1348E-05 2.6461E-06 S2 -9.4114E-02 1.6522E-02 6.0615E-04 3.1729E-04 1.2530E-04 6.2114E-05 2.9516E-05 S3 -6.2322E-02 1.3484E-02 -2.4399E-04 2.4160E-04 3.4523E-05 -3.7408E-06 -4.5322E-05 S4 4.7522E-03 -1.2742E-02 7.9015E-03 -1.0949E-03 1.1255E-03 -2.2282E-04 1.9363E-04 S5 -9.3177E-02 -1.1011E-02 6.4228E-03 -1.9393E-03 6.2313E-04 -4.6595E-04 1.3895E-04 S6 -2.0453E-01 9.6663E-03 -2.7701E-03 -1.1997E-04 -6.3051E-04 -5.0673E-05 -1.0293E-04 S7 -3.0123E-01 5.1163E-02 -4.9936E-04 2.2916E-03 -1.7455E-03 -5.0118E-05 -2.1121E-04 S8 -4.5264E-01 5.1548E-02 -2.9503E-03 5.7797E-03 -6.9866E-04 5.4827E-04 -8.0023E-04 S9 -6.4716E-02 6.3582E-02 -4.6299E-03 -3.6495E-03 -9.3225E-04 1.0547E-03 -1.1435E-03 S10 1.1912E+00 -1.1240E-01 9.6673E-02 -4.2258E-02 7.8721E-03 -4.9520E-03 3.7127E-03 S11 6.7690E-01 -1.7452E-01 1.7719E-01 -6.4882E-02 2.6220E-02 -2.9702E-02 1.2151E-02 S12 -4.9276E+00 8.3532E-01 -2.7555E-01 1.2622E-01 -4.0761E-02 2.1972E-02 -1.0058E-02

[0081] Table 2-1

[0082] Number of surfaces and coefficients A18 A20 A22 A24 A26 A28 A30 S1 -1.6676E-06 -9.6106E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 7.0182E-06 1.0653E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.4694E-05 -3.1340E-05 -1.0285E-05 -9.7830E-06 0.0000E+00 0.0000E+00 0.0000E+00 S4 -5.8226E-05 4.6367E-05 -2.6967E-05 2.1841E-06 -7.5471E-06 0.0000E+00 0.0000E+00 S5 -8.7852E-05 5.1266E-05 -2.4156E-05 1.4423E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.1089E-05 -1.7790E-05 -1.4015E-06 6.3663E-06 8.6199E-06 0.0000E+00 0.0000E+00 S7 1.9675E-04 -6.7622E-05 1.3063E-05 -5.6819E-05 4.1431E-06 -1.1742E-05 1.1967E-05 S8 1.3897E-04 9.9101E-06 1.8624E-04 -3.0685E-05 1.9396E-05 -3.6443E-05 4.7633E-06 S9 6.7700E-05 1.0038E-04 1.7820E-04 -1.6121E-04 1.6196E-05 -1.1295E-05 1.3543E-05 S10 -1.6089E-03 2.8355E-04 -8.6228E-05 1.8676E-04 -4.8081E-06 -7.3086E-05 2.3259E-05 S11 -6.6999E-03 3.4362E-03 -4.3648E-03 5.7152E-04 -1.2821E-03 4.1135E-04 -4.8615E-04 S12 5.0171E-03 -2.5701E-03 9.2113E-04 -1.0789E-03 -4.5334E-05 -2.6740E-04 -6.0515E-05

[0083] Table 2-2

[0084] Figure 5A The on-axis chromatic aberration curve of the optical imaging lens 110 of Embodiment 1 is shown, which represents the deflection of the convergence focal point after light of different wavelengths passes through the optical imaging lens 110. Figure 5B The astigmatism curve of the optical imaging lens 110 of Embodiment 1 in the visible light band is shown. Figure 5D The astigmatism curve of the optical imaging lens 110 of Embodiment 1 in the infrared band is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 5C The distortion curve of the optical imaging lens 110 of Embodiment 1 in the visible light band is shown. Figure 5E The distortion curve of the optical imaging lens 110 of Embodiment 1 in the infrared band is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 5F The magnification chromatic aberration curve of the optical imaging lens 110 of Embodiment 1 in the visible light band is shown. Figure 5G The magnification chromatic aberration curve of the optical imaging lens 110 of Embodiment 1 in the infrared band is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 5A to 5G It can be seen that the optical imaging lens 110 of Embodiment 1 can achieve good imaging quality.

[0085] Example 2

[0086] The following is for reference Figure 3 Embodiment 2 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, parts similar to those in Embodiment 1 are omitted. Figure 3 A schematic diagram of the structure of an optical imaging lens 120 according to Embodiment 2 of this application is shown.

[0087] like Figure 3As shown, the optical imaging lens 120 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0088] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 1. The basic parameters of the optical imaging lens 120 can be referred to Table 1 of Embodiment 1, and the higher-order coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to Tables 2-1 and 2-2 of Embodiment 1.

[0089] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 120 in Example 2 can be referenced from Example 1. Figures 5A to 5G .according to Figures 5A to 5C It can be seen that the optical imaging lens 120 of Embodiment 2 can achieve good imaging quality.

[0090] Example 3

[0091] The following is for reference Figure 4 Embodiment 3 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, descriptions similar to those in Embodiment 1 are omitted. Figure 4 A schematic diagram of the structure of an optical imaging lens 130 according to Embodiment 3 of this application is shown.

[0092] like Figure 4 As shown, the optical imaging lens 130 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0093] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 1. The basic parameters of the optical imaging lens 130 can be referred to Table 1 of Embodiment 1, and the higher-order term coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to Tables 2-1 and 2-2 of Embodiment 1.

[0094] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 130 in Example 3 can be referenced from Example 1. Figures 5A to 5G .according to Figures 5A to 5C It can be seen that the optical imaging lens 130 of Embodiment 3 can achieve good imaging quality.

[0095] Example 4

[0096] The following is for reference Figure 6 Description of Embodiment 4 of the optical imaging lens according to this application. Figure 6 A schematic diagram of the structure of an optical imaging lens 140 according to Embodiment 4 of this application is shown.

[0097] like Figure 6 As shown, the optical imaging lens 140 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0098] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0099] In this embodiment, the first spacer element P1 is located between the first lens E1 and the second lens E2, and its object-side surface partially abuts against the first lens E1. The second spacer element P2 is located between the second lens E2 and the third lens E3, and its object-side surface partially abuts against the second lens E2. The third spacer element P3 is located between the third lens E3 and the fourth lens E4, and its object-side surface partially abuts against the third lens E3. The fourth spacer element P4 is located between the fourth lens E4 and the fifth lens E5, and its object-side surface partially abuts against the fourth lens E4. The fifth spacer element P5 is located between the fifth lens E5 and the sixth lens E6, and its object-side surface partially abuts against the fifth lens E5. The spacer elements can block excess external light from entering, allowing the lens and lens barrel P0 to better abut against each other, thus enhancing the structural stability of the optical imaging lens 120.

[0100] Table 3 shows the basic parameters of the optical imaging lens 140 of Embodiment 4, where the units for radius of curvature and thickness are millimeters (mm). In this embodiment, the object-side and image-side surfaces of any one of the first lens E1 to the sixth lens E6 are aspherical. Tables 4-1 and 4-2 show the higher-order coefficients A4, A6, A8, and A6 that can be used for each aspherical mirror S1-S12 in Embodiment 4. 10 A 12 A 14 A 16 A 18 A 20 A 22 A 24 A 26 A 28 and A 30 Each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0101]

[0102]

[0103] Table 3

[0104] Number of surfaces and coefficients A4 A6 A8 A10 A12 A14 A16 S1 -9.9307E-02 8.4253E-03 1.5467E-03 -7.3180E-05 -1.0537E-04 -8.3382E-06 1.9009E-05 S2 -8.7278E-02 1.4132E-02 7.2193E-04 2.2613E-04 8.5981E-05 1.7481E-05 2.2589E-05 S3 -6.3930E-02 1.3902E-02 -3.6212E-04 1.9418E-04 1.0213E-04 -1.2774E-05 -1.9662E-05 S4 1.7802E-02 -1.8795E-02 9.4115E-03 -1.5305E-03 1.6862E-03 -3.5978E-04 3.1650E-04 S5 -7.4792E-02 -1.5381E-02 7.3478E-03 -2.2603E-03 9.4092E-04 -5.9611E-04 3.0942E-04 S6 -2.1886E-01 5.9709E-03 -7.2354E-03 -1.0370E-03 -1.4816E-03 -2.9314E-04 -1.4644E-04 S7 -3.3499E-01 5.8380E-02 -2.4408E-03 2.6142E-03 -2.5182E-03 -4.3554E-04 -5.3658E-04 S8 -4.9990E-01 6.4509E-02 3.4761E-03 7.6593E-03 -1.9457E-03 -3.5537E-04 -8.7068E-04 S9 -8.0362E-02 7.5323E-02 -1.7174E-05 -7.1371E-03 -3.2486E-03 6.4864E-05 -8.1247E-04 S10 1.2463E+00 -9.8021E-02 9.3884E-02 -4.6392E-02 7.1877E-03 -4.3144E-03 3.5980E-03 S11 6.9841E-01 -1.5480E-01 1.8948E-01 -6.7323E-02 2.7627E-02 -2.5837E-02 1.4960E-02 S12 -4.8564E+00 8.4209E-01 -2.7617E-01 1.1279E-01 -4.1365E-02 2.2425E-02 -7.9959E-03

[0105] Table 4-1

[0106] Number of surfaces and coefficients A18 A20 A22 A24 A26 A28 A30 S1 -9.1980E-06 -1.0818E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.2670E-06 1.3014E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.5351E-05 -3.0834E-05 -2.3384E-05 -1.6070E-05 0.0000E+00 0.0000E+00 0.0000E+00 S4 -9.3229E-05 6.4416E-05 -7.0295E-05 -6.2761E-06 -3.5767E-05 0.0000E+00 0.0000E+00 S5 -5.2114E-05 8.2999E-05 -3.6626E-05 1.8471E-05 0.0000E+00 0.0000E+00 0.0000E+00 S6 -9.4395E-06 -9.7083E-06 3.4089E-05 2.2703E-05 2.1774E-05 0.0000E+00 0.0000E+00 S7 -5.3334E-07 -1.9441E-04 -5.5465E-05 -8.9378E-05 -1.1290E-05 -8.2796E-06 1.5084E-05 S8 1.8367E-04 -8.8738E-05 2.6882E-05 -1.0850E-04 1.9849E-05 -1.1006E-05 1.8570E-05 S9 -7.4899E-05 -1.4600E-04 9.5928E-06 -1.6446E-04 4.1799E-05 3.4620E-05 2.5931E-05 S10 -1.6013E-03 3.0355E-04 9.4465E-05 1.9570E-04 -1.2306E-05 -8.3677E-05 1.1765E-06 S11 -5.7425E-03 4.7893E-03 -3.3460E-03 1.2672E-03 -8.6477E-04 6.7403E-04 -2.0183E-04 S12 4.3710E-03 -1.6636E-03 1.0449E-03 -2.6025E-04 -3.9329E-05 2.7156E-04 2.7678E-05

[0107] Table 4-2

[0108] Figure 9A The on-axis chromatic aberration curve of the optical imaging lens 140 of Embodiment 4 is shown, which represents the deflection of the convergence focal point after light of different wavelengths passes through the optical imaging lens 140. Figure 9BThe astigmatism curve of the optical imaging lens 140 in the visible light band of Embodiment 4 is shown. Figure 9D The astigmatism curve of the optical imaging lens 140 of Embodiment 4 in the infrared band is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 9C The distortion curve of the optical imaging lens 140 in the visible light band of Embodiment 4 is shown. Figure 9E The distortion curve of the optical imaging lens 140 of Embodiment 4 in the infrared band is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 9F The magnification chromatic aberration curve of the optical imaging lens 140 in the visible light band of Embodiment 4 is shown. Figure 9G The magnification chromatic aberration curve of the optical imaging lens 140 of Embodiment 4 in the infrared band is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 9A to 9G It can be seen that the optical imaging lens 140 of Embodiment 4 can achieve good imaging quality.

[0109] Example 5

[0110] The following is for reference Figure 7 Embodiment 5 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, parts similar to those in Embodiment 4 are omitted. Figure 7 A schematic diagram of the structure of an optical imaging lens 150 according to Embodiment 5 of this application is shown.

[0111] like Figure 7 As shown, the optical imaging lens 150 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group includes, in sequence along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0112] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 4. The basic parameters of the optical imaging lens 150 can be referred to Table 3 of Embodiment 4, and the higher-order coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to Tables 4-1 and 4-2 of Embodiment 4.

[0113] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 150 in Example 5 can be referenced from Example 4. Figures 9A to 9G .according to Figures 9A to 9C It can be seen that the optical imaging lens 150 of Embodiment 5 can achieve good imaging quality.

[0114] Example 6

[0115] The following is for reference Figure 8 Embodiment 6 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, parts similar to those in Embodiment 4 are omitted. Figure 8 A schematic diagram of the structure of an optical imaging lens 160 according to Embodiment 6 of this application is shown.

[0116] like Figure 8 As shown, the optical imaging lens 160 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0117] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 4. The basic parameters of the optical imaging lens 160 can be referred to in Table 3 of Embodiment 4, and the higher-order term coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to in Tables 4-1 and 4-2 of Embodiment 4.

[0118] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 160 of Example 6 can be referenced from Example 4. Figures 9A to 9G .according to Figures 9A to 9C It can be seen that the optical imaging lens 160 of Embodiment 6 can achieve good imaging quality.

[0119] Example 7

[0120] The following is for reference Figure 10 Embodiment 7 of the optical imaging lens according to this application is described. Figure 10 A schematic diagram of the structure of an optical imaging lens 170 according to Embodiment 7 of this application is shown.

[0121] like Figure 10 As shown, the optical imaging lens 170 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0122] In this embodiment, the first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being concave and its image-side surface S12 being concave.

[0123] In this embodiment, the first spacer element P1 is located between the first lens E1 and the second lens E2, and its object-side surface partially abuts against the first lens E1. The second spacer element P2 is located between the second lens E2 and the third lens E3, and its object-side surface partially abuts against the second lens E2. The third spacer element P3 is located between the third lens E3 and the fourth lens E4, and its object-side surface partially abuts against the third lens E3. The fourth spacer element P4 is located between the fourth lens E4 and the fifth lens E5, and its object-side surface partially abuts against the fourth lens E4. The fifth spacer element P5 is located between the fifth lens E5 and the sixth lens E6, and its object-side surface partially abuts against the fifth lens E5. The spacer elements can block excess external light from entering, allowing the lens and lens barrel P0 to better abut against each other, thus enhancing the structural stability of the optical imaging lens 130.

[0124] Table 5 shows the basic parameters of the optical imaging lens 170 of Embodiment 7, wherein the units of radius of curvature and thickness are millimeters (mm). In this embodiment, the object-side and image-side surfaces of any one of the first lens E1 to the sixth lens E6 are aspherical. Tables 6-1 and 6-2 show the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28 and A30 that can be used for each aspherical mirror S1-S12 in Embodiment 7, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[0125]

[0126] Table 5

[0127]

[0128]

[0129] Table 6-1

[0130] Number of surfaces and coefficients A18 A20 A22 A24 A26 A28 A30 S1 -2.1162E-05 -2.3387E-05 -7.4084E-06 -6.9941E-06 -1.9752E-06 6.3189E-07 6.2190E-06 S2 -2.8647E-05 -2.0475E-05 -2.9428E-05 -1.7588E-05 -1.4985E-05 -2.2307E-06 -3.2487E-06 S3 4.4259E-06 -9.6492E-06 -5.8899E-06 -7.6793E-06 1.3316E-06 -6.7169E-07 -6.5261E-07 S4 -7.1740E-05 4.4645E-05 -1.7384E-05 1.1535E-05 -1.2845E-06 3.7361E-06 -1.9432E-06 S5 -9.4457E-05 3.9509E-05 -2.0296E-05 1.0021E-05 -2.0306E-06 9.4845E-07 -3.5786E-07 S6 -6.8892E-05 -1.0564E-05 -1.4745E-05 3.3493E-06 -1.6046E-06 1.1879E-07 9.9346E-07 S7 -1.7040E-04 -1.3409E-04 -9.0655E-05 -3.1856E-05 6.4196E-06 1.6002E-05 8.6133E-06 S8 1.8376E-04 6.8395E-05 8.1680E-05 -3.1056E-05 7.4665E-07 -2.9461E-05 1.8975E-06 S9 3.8245E-04 -1.4949E-04 1.6394E-04 -6.3375E-05 4.5252E-05 -2.8558E-05 1.1648E-05 S10 -1.0449E-03 5.2241E-04 -3.6009E-05 8.1441E-05 1.0585E-06 -1.2409E-05 1.2568E-06 S11 -8.2724E-03 2.0513E-03 -3.0515E-03 3.9819E-04 -1.0656E-03 8.3783E-05 -3.7035E-04 S12 4.3580E-03 -2.1981E-03 9.3820E-04 -3.3180E-04 2.2374E-04 -1.6285E-04 4.7774E-05

[0131] Table 6-2

[0132] Figure 13A The on-axis chromatic aberration curve of the optical imaging lens 170 of Embodiment 7 is shown, which represents the deflection of the convergence focal point after light of different wavelengths passes through the optical imaging lens 170. Figure 13B The astigmatism curve of the optical imaging lens 170 of Embodiment 7 in the visible light band is shown. Figure 13D The astigmatism curve of the optical imaging lens 170 of Embodiment 7 in the infrared band is shown, which represents the meridional image plane curvature and sagittal image plane curvature corresponding to different image heights. Figure 13C The distortion curve of the optical imaging lens 170 in the visible light band of Embodiment 7 is shown. Figure 13E The distortion curve of the optical imaging lens 170 of Embodiment 7 in the infrared band is shown, which represents the distortion magnitude value corresponding to different image heights. Figure 13F The magnification chromatic aberration curve of the optical imaging lens 170 in the visible light band of Embodiment 7 is shown. Figure 13G The magnification chromatic aberration curve of the optical imaging lens 170 of Embodiment 7 in the infrared band is shown, which represents the deviation of different image heights on the imaging plane after light passes through the lens. According to Figures 13A to 13G It can be seen that the optical imaging lens 170 of Embodiment 7 can achieve good imaging quality.

[0133] Example 8

[0134] The following is for reference Figure 11Embodiment 8 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, parts similar to those in Embodiment 7 are omitted. Figure 11 A schematic diagram of the structure of an optical imaging lens 180 according to Embodiment 8 of this application is shown.

[0135] like Figure 11 As shown, the optical imaging lens 180 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0136] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 7. The basic parameters of the optical imaging lens 180 can be referred to in Table 5 of Embodiment 7, and the higher-order term coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to in Tables 6-1 and 6-2 of Embodiment 7.

[0137] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 180 of Example 8 can be referenced from Example 7. Figures 13A to 13G .according to Figures 13A to 13C It can be seen that the optical imaging lens 180 of Embodiment 8 can achieve good imaging quality.

[0138] Example 9

[0139] The following is for reference Figure 12 Embodiment 9 of the optical imaging lens according to this application is described. In this embodiment, for the sake of brevity, parts similar to those in Embodiment 7 are omitted. Figure 12 A schematic diagram of the structure of an optical imaging lens 190 according to Embodiment 9 of this application is shown.

[0140] like Figure 12As shown, the optical imaging lens 190 includes a lens barrel P0 and a six-element lens group and a spacer element group mounted in the lens barrel P0. The six-element lens group, arranged sequentially along the optical axis from the object side to the image side, includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. An aperture stop STO can be positioned between the first lens E1 and the second lens E2 as needed. The spacer element group includes: a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5.

[0141] In this embodiment, the optical power and surface shape of the first lens E1 to the sixth lens E6, and the positions and contact relationships of the first spacer element P1 to the fifth spacer element P5 with the lenses, can be referred to in Embodiment 7. The basic parameters of the optical imaging lens 190 can be referred to in Table 5 of Embodiment 7, and the higher-order coefficients of each aspherical mirror surface S1-S12 in the first lens E1 to the sixth lens E6 can be referred to in Tables 6-1 and 6-2 of Embodiment 7.

[0142] The on-axis chromatic aberration curve, astigmatism curve in the visible light band, distortion curve in the visible light band, astigmatism curve in the infrared light band, distortion curve in the infrared light band, magnification chromatic aberration curve in the visible light band, and magnification chromatic aberration curve in the infrared light band of the optical imaging lens 190 of Example 9 can be referenced from Example 7. Figures 13A to 13G .according to Figures 13A to 13C It can be seen that the optical imaging lens 190 of Embodiment 9 can achieve good imaging quality.

[0143] Tables 7 and 8 provide some optical parameters of the optical imaging lenses in each of Examples 1 to 9. The optical parameters listed in Table 7, such as FOV, EPD, f, f1, f2, f3, f4, f5, and f6, are the same for Examples 1 to 3, Examples 4 to 6, and Examples 7 to 9. The optical parameters listed in Table 8, such as d1s, D1m, D1s, d2s, d3s, d3m, D3m, D4s, D4m, d5s, d5m, d0s, d0m, D0s, D0m, EP01, EP12, CP2, EP23, CP3, EP34, EP45, and CP5, are... Figure 1 The measurements were obtained using the annotation method shown, and the units for the optical parameters listed in Table 8 are all millimeters (mm).

[0144] Basic Data / Example 1 to 3 4 to 6 7 to 9 FOV 95.2644 95.4550 95.3760 EPD 1.6632 1.6746 1.5451 f(mm) 3.3751 3.3981 3.3956 f1(mm) 166.6667 27.2034 56.1515 f2 (mm) 2.5759 2.3378 2.3650 f3 (mm) -3.8488 -2.7545 -3.6847 f4 (mm) -27.0360 -291.4231 -39.2978 f5 (mm) 1.2406 1.2397 1.2859 f6 (mm) -1.2608 -1.2341 -1.2631

[0145] Table 7

[0146]

[0147]

[0148] Table 8

[0149] The conditional expressions of the optical imaging lenses in each of the embodiments in Examples 1 to 9 satisfy the conditions shown in Table 9.

[0150]

[0151] Table 9

[0152] Figures 14 to 16 The equivalent stress diagram of the optical imaging lens is shown. Among them, Figure 14 This is the equivalent stress diagram of an optical imaging lens under the condition 6 < (D0m + D0s) / (Tan(FOV / 4) * d5m) < 11. Figure 15 This is the equivalent stress diagram of an optical imaging lens under the condition (D0m+D0s) / (Tan(FOV / 4)*d5m)<6. Figure 16 This is the equivalent stress diagram of an optical imaging lens under the condition (D0m+D0s) / (Tan(FOV / 4)*d5m)>11. According to... Figures 14 to 16 It is understood that the optical imaging lens of this application has the characteristic of stable assembly.

[0153] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0154] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of protection involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the concept of this application. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that, include: A lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along the optical axis from the object side to the image side, wherein the first lens, the second lens, and the fifth lens have positive optical power, and the third lens, the fourth lens, and the sixth lens have negative optical power; The object-side surface of the first lens is convex, and the image-side surface is concave. The object-side surface of the second lens is convex, and the image-side surface is also convex. The image-side surface of the third lens is concave; The object-side surface of the fifth lens is concave, and the image-side surface is convex. The object-side surface of the sixth lens is concave, and the image-side surface is also concave. A group of spacer elements includes a first spacer element, a second spacer element, a third spacer element, and a fifth spacer element. The first spacer element is located between a first lens and a second lens, and its object-side surface abuts against a portion of the first lens. The second spacer element is located between the second lens and the third lens, and its object-side surface abuts against a portion of the second lens. The third spacer element is located between the third lens and a fourth lens, and its object-side surface abuts against a portion of the third lens. The fifth spacer element is located between the fifth lens and a sixth lens, and its object-side surface abuts against a portion of the fifth lens. A lens barrel, in which the lens group and the spacer element group are assembled; The optical imaging lens has six lenses with optical power. Wherein, the outer diameter D0m of the image-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, the maximum field of view FOV of the optical imaging lens and the inner diameter d5m of the image-side surface of the fifth spacer element, the radius of curvature R2 of the image-side surface of the first lens, the radius of curvature R6 of the image-side surface of the third lens, the Abbe number V1 of the first lens, the Abbe number V3 of the third lens, the spacing EP12 between the first spacer element and the second spacer element along the optical axis, and the spacing EP23 between the second spacer element and the third spacer element along the optical axis satisfy the following: 7.4149≤(D0m+D0s) / (Tan(FOV / 4) (d5m) ≤ 9.5561; 20.5191≤(R2+R6) (V1-V3) / (EP12+EP23)≤34.9366。 2. The optical imaging lens according to claim 1, characterized in that, The effective focal length f6 of the sixth lens, the maximum thickness CP5 of the fifth spacer element along the optical axis, the center thickness CT6 of the sixth lens on the optical axis, the air gap T56 between the fifth and sixth lenses on the optical axis, and the outer diameter D5m of the image-side surface of the fifth spacer element satisfy the following: -20.2136mm≤f6 / (CP5+CT6-T56) D5m≤-9.1317mm。 3. The optical imaging lens according to claim 1, characterized in that, The spacer element group further includes a fourth spacer element, which is located between the fourth lens and the fifth lens, and the object side of the fourth spacer element abuts against the fourth lens portion; Wherein, the outer diameter D4m of the image side of the fourth spacer element, the outer diameter D5s of the object side of the fifth spacer element, the radius of curvature R9 of the object side of the fifth lens, and the radius of curvature R10 of the image side of the fifth lens satisfy the following: -3.4859≤(D4m+D5s) / (R9+R10)≤-1.5974.

4. The optical imaging lens according to claim 1, characterized in that, The inner diameter d0m of the image-side end face of the lens barrel, the inner diameter d5s of the object-side end face of the fifth spacer element, the entrance pupil diameter EPD of the optical imaging lens, and the effective focal length f of the optical imaging lens satisfy the following: 4.2045≤(d0m-d5s) / EPD (d0m / f)≤5.1979.

5. The optical imaging lens according to claim 3, characterized in that, The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the Abbe number V4 of the fourth lens, the Abbe number V5 of the fifth lens, and the spacing EP45 between the fourth and fifth spacers along the optical axis satisfy the following: -8.6470≤(f4+f5) / (V4+V5) / EP45≤-0.5321.

6. The optical imaging lens according to claim 3, characterized in that, The effective focal length f3 of the third lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, and the spacing EP34 between the third and fourth spacers along the optical axis satisfy the following: -43.5172≤f3 (N3+N4) / EP34≤-26.0920。 7. The optical imaging lens according to claim 6, characterized in that, The outer diameter D3m of the image side of the third spacer element, the radius of curvature R5 of the object side of the third lens, the radius of curvature R7 of the object side of the fourth lens, and the outer diameter D4s of the object side of the fourth spacer element satisfy the following: -5.5638≤(D3m R5) / (D4s R7)≤1.7898.

8. The optical imaging lens according to claim 6, characterized in that, The inner diameter d3m of the image-side surface of the third spacer element, the outer diameter D3s of the object-side surface of the third spacer element, the air gap T34 between the third lens and the fourth lens on the optical axis, and the radius of curvature R8 of the image-side surface of the fourth lens satisfy the following: -1.1816≤(d3m D3s) / (T34 R8)≤12.2695。 9. The optical imaging lens according to claim 6, characterized in that, The effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the maximum thickness CP2 of the second spacer element along the optical axis, the spacing EP23 between the second and third spacers along the optical axis, and the maximum thickness CP3 of the third spacer element along the optical axis satisfy the following: -2.8571≤(f2+f3) / (CP2+EP23+CP3)≤-0.5419.

10. The optical imaging lens according to claim 9, characterized in that, The radius of curvature R3 of the object-side surface of the second lens, the radius of curvature R4 of the image-side surface of the second lens, the inner diameter d3s of the object-side surface of the third spacer element, and the inner diameter d2s of the object-side surface of the second spacer element satisfy the following: 1.3554≤(R3+R4) / (d3s-d2s)≤6.3986.

11. The optical imaging lens according to claim 9, characterized in that, The effective focal length f of the optical imaging lens, the inner diameter d0s of the object-side end face of the lens barrel, the outer diameter D0s of the object-side end face of the lens barrel, and the distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer element along the optical axis satisfy the following: 32.2609mm≤f (d0s+D0s) / EP01≤41.1494mm.

12. The optical imaging lens according to claim 11, characterized in that, The radius of curvature R3 of the object-side surface of the second lens, the inner diameter d2s of the object-side surface of the second spacer element, the inner diameter d1m of the image-side surface of the first spacer element, and the distance EP12 between the first spacer element and the second spacer element along the optical axis satisfy the following: 1.0078mm≤R3 (d2s-d1m) / EP12≤3.7993mm。 13. The optical imaging lens according to claim 11, characterized in that, The radius of curvature R1 of the object-side surface of the first lens, the radius of curvature R2 of the image-side surface of the first lens, the outer diameter D1s of the object-side surface of the first spacer element, and the inner diameter d1s of the object-side surface of the first spacer element satisfy the following: 6.0623≤(R1 R2) / (D1s d1s)≤9.8194.

14. The optical imaging lens according to claim 1, characterized in that, The outer diameter D5m of the image side of the fifth spacer element, the edge thickness ET6 at the maximum effective half-aperture of the sixth lens, and the center thickness CT6 of the sixth lens on the optical axis satisfy the following: 2.7679mm ≤ D5m / (ET6 / CT6) ≤ 3.2641mm.

Images