Optical imaging lens

Abstract

The present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical focal power; an aperture; a second lens with optical focal power, whose image side surface is convex; a third lens with negative optical focal power; a fourth lens with optical focal power; and a fifth lens with optical focal power; wherein, a distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the vertex of the effective radius of the image side surface of the third lens on the optical axis and a distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens on the optical axis satisfy the following conditions: 0.5<SAG32 / SAG11<2.5.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical imaging lens. Background Art

[0002] Endoscopes are commonly used medical devices that can enter the human body through natural orifices or surgical incisions and are used to examine hard-to-reach tissue structures inside the body. Endoscopes include capsule endoscopes. Because capsule endoscopes need to be swallowed to enter the body, they are usually small and disposable. In addition, compared with traditional endoscopes, disposable capsule endoscopes can avoid the risk of cross-infection. At the same time, capsule endoscopes with a rounded shape and small size can reduce the pain caused to patients during examinations. However, existing capsule endoscope lenses have technical problems such as a small field of view, poor imaging quality, and low relative illumination.

[0003] Therefore, there is an urgent need in the market to provide an optical imaging lens for capsule endoscope that can at least partially solve the above technical problems. Summary of the Invention

[0004] The present application provides an optical imaging lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical focal power; an aperture; a second lens with optical focal power, whose image side surface is convex; a third lens with negative optical focal power; a fourth lens with optical focal power; and a fifth lens with optical focal power; wherein, the distance SAG32 from the intersection of the image side surface of the third lens and the optical axis to the effective radius vertex of the image side surface of the third lens on the optical axis and the distance SAG11 from the intersection of the object side surface of the first lens and the optical axis to the effective radius vertex of the object side surface of the first lens on the optical axis satisfy: 0.5<SAG32 / SAG11<2.5; and at least one mirror surface from the object side surface of the first lens to the image side surface of the fifth lens is an aspherical surface.

[0005] In some embodiments, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 1.5<(R3-R4) / (R3+R4)<2.5.

[0006] In some embodiments, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 2.0<f / EPD≤2.5.

[0007] In some embodiments, the effective focal length f3 of the third lens and the curvature radius R6 of the image-side surface of the third lens may satisfy: -2.5≤f3 / R6≤-1.5.

[0008] In some embodiments, a curvature radius R9 of the object-side surface of the fifth lens element and a curvature radius R8 of the image-side surface of the fourth lens element may satisfy: 6.0<(R9-R8) / (R9+R8)<19.5.

[0009] In some embodiments, the effective focal length f5 of the fifth lens element and the curvature radius R10 of the image-side surface of the fifth lens element may satisfy: -5.5<f5 / R10<-4.0.

[0010] In some embodiments, a center thickness CT4 of the fourth lens on the optical axis and a spacing distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.0<CT4 / T45<2.0.

[0011] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.0<f1 / f2<-1.0.

[0012] In some embodiments, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 2.0<CT4 / ET4<2.5.

[0013] In some embodiments, a distance SAG42 from an intersection of the image-side surface of the fourth lens and the optical axis to a vertex of an effective radius of the image-side surface of the fourth lens on the optical axis may satisfy: -4.5<1 / SAG42<-3.0.

[0014] In some embodiments, half of the maximum field of view (Semi-FOV) of the optical imaging lens may satisfy: Semi-FOV>50.0°.

[0015] In some embodiments, the relative brightness RI corresponding to the maximum field angle of the optical imaging lens may satisfy: RI>40%.

[0016] In some embodiments, the Abbe number V2 of the second lens element and the Abbe number V3 of the third lens element may satisfy: V2-V3>30.

[0017] In some embodiments, a distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens on the optical axis and a distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis may satisfy: 2.0<SAG41 / SAG21<4.0.

[0018] In some embodiments, a mirror aperture including a hole region is provided on the object side of the optical imaging lens, wherein a radius D of the hole region may satisfy the following: 0.5 mm < D < 1.0 mm.

[0019] The present application also provides an optical imaging lens, which includes, in order from the object side to the two sides along the optical axis: a first lens with negative optical focal power; an aperture; a second lens with optical focal power, whose image side surface is convex; a third lens with negative optical focal power; a fourth lens with optical focal power; and a fifth lens with optical focal power; wherein, the distance SAG42 from the intersection of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens on the optical axis satisfies: -4.5<1 / SAG42<-3.0; and at least one mirror surface from the object side surface of the first lens to the image side surface of the fifth lens is an aspherical surface.

[0020] In some embodiments, a curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens may satisfy: 1.5<(R3-R4) / (R3+R4)<2.5.

[0021] In some embodiments, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: 2.0<f / EPD≤2.5.

[0022] In some embodiments, the effective focal length f3 of the third lens and the curvature radius R6 of the image-side surface of the third lens may satisfy: -2.5≤f3 / R6≤-1.5.

[0023] In some embodiments, a curvature radius R9 of the object-side surface of the fifth lens element and a curvature radius R8 of the image-side surface of the fourth lens element may satisfy: 6.0<(R9-R8) / (R9+R8)<19.5.

[0024] In some embodiments, the effective focal length f5 of the fifth lens element and the curvature radius R10 of the image-side surface of the fifth lens element may satisfy: -5.5<f5 / R10<-4.0.

[0025] In some embodiments, a center thickness CT4 of the fourth lens on the optical axis and a spacing distance T45 between the fourth lens and the fifth lens on the optical axis may satisfy: 1.0<CT4 / T45<2.0.

[0026] In some embodiments, the effective focal length f1 of the first lens and the effective focal length f2 of the second lens may satisfy: -2.0<f1 / f2<-1.0.

[0027] In some embodiments, a center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens may satisfy: 2.0<CT4 / ET4<2.5.

[0028] In some embodiments, half of the maximum field of view (Semi-FOV) of the optical imaging lens may satisfy: Semi-FOV>50.0°.

[0029] In some embodiments, the relative brightness RI corresponding to the maximum field angle of the optical imaging lens may satisfy: RI>40%.

[0030] In some embodiments, the Abbe number V2 of the second lens element and the Abbe number V3 of the third lens element may satisfy: V2-V3>30.

[0031] In some embodiments, a distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object side surface of the fourth lens on the optical axis and a distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the vertex of the effective radius of the object side surface of the second lens on the optical axis may satisfy: 2.0<SAG41 / SAG21<4.0.

[0032] In some embodiments, a mirror aperture including a hole region is provided on the object side of the optical imaging lens, wherein a radius D of the hole region may satisfy the following: 0.5 mm < D < 1.0 mm.

[0033] The present application adopts a five-piece optical imaging lens architecture. By rationally allocating the optical power, surface shape, center thickness of each lens, and on-axis spacing between lenses, the optical imaging lens has at least one beneficial effect such as good imaging quality, a large field of view, and good processing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0035] Figure 1 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0036] Figure 2 shows a light trend diagram of the optical imaging lens according to Example 1 of the present application;

[0037] Figures 3A to 3D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 1 are shown respectively;

[0038] Figure 4 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0039] 5A to 5D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 2 are shown respectively;

[0040] Figure 6 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0041] 7A to 7D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 3 are shown respectively;

[0042] Figure 8 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0043] 9A to 9D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 4 are shown respectively;

[0044] Figure 10 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0045] 11A to 11D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 5 are shown respectively;

[0046] Figure 12 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0047] 13A to 13D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 6 are shown respectively;

[0048] Figure 14 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application; and

[0049] 15A to 15D The axial chromatic aberration curve, astigmatism curve, magnification chromatic aberration curve, and relative illumination curve of the optical imaging lens of Example 7 are respectively shown. DETAILED DESCRIPTION

[0050] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0051] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0052] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0053] In this article, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0054] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0055] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0056] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] The features, principles and other aspects of the present application are described in detail below.

[0058] An optical imaging lens according to an exemplary embodiment of the present application may include, for example, five lenses having optical power: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. These five lenses are arranged sequentially along the optical axis from the object side to the image side. Among the first through fifth lenses, any two adjacent lenses may have an air gap between them.

[0059] In an exemplary embodiment, the optical imaging lens may further include at least one aperture stop, which may be disposed at an appropriate position as needed, for example, between the object side and the second lens and the third lens.

[0060] In an exemplary embodiment, the first lens may have negative optical power; the second lens may have positive optical power or negative optical power, and its image-side surface may be convex; the third lens may have negative optical power; the fourth lens may have positive optical power or negative optical power; and the fifth lens may have positive optical power or negative optical power.

[0061] In an exemplary embodiment, one of the first through fifth lenses may be a glass lens. Glass has a low coefficient of thermal expansion and is less affected by ambient temperature. By properly combining the materials of the various lenses, the optical imaging lens can maintain high resolution over a wide temperature range.

[0062] In an exemplary embodiment, the optical imaging lens may satisfy 0.5 < SAG32 / SAG11 < 2.5, where SAG32 is the distance on the optical axis from the intersection of the image-side surface of the third lens and the optical axis to the vertex of the effective radius of the image-side surface of the third lens, and SAG11 is the distance on the optical axis from the intersection of the object-side surface of the first lens and the optical axis to the vertex of the effective radius of the object-side surface of the first lens. The optical imaging lens satisfies the following conditions: 0.5 < SAG32 / SAG11 < 2.5, which is beneficial for lens molding processing, and is beneficial for imaging quality of the optical imaging lens and increasing the maximum field of view. More specifically, SAG32 and SAG11 may satisfy the following conditions: 0.8 < SAG32 / SAG11 < 2.2.

[0063] In an exemplary embodiment, the optical imaging lens may satisfy 1.5 < (R3 - R4) / (R3 + R4) < 2.5, where R3 is the radius of curvature of the object-side surface of the second lens element, and R4 is the radius of curvature of the image-side surface of the second lens element. This optical imaging lens satisfies the following conditions: 1.5 < (R3 - R4) / (R3 + R4) < 2.5, which facilitates lens molding and reduces the risk of weld marks. More specifically, R3 and R4 may satisfy the following conditions: 1.8 < (R3 - R4) / (R3 + R4) < 2.3.

[0064] In an exemplary embodiment, the optical imaging lens may satisfy the following relationship: 2.0 < f / EPD ≤ 2.5, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. This relationship may improve brightness and image quality. More specifically, f and EPD may satisfy the following relationship: 2.3 < f / EPD ≤ 2.5.

[0065] In an exemplary embodiment, the optical imaging lens may satisfy -2.5 ≤ f3 / R6 ≤ -1.5, where f3 is the effective focal length of the third lens element, and R6 is the radius of curvature of the image-side surface of the third lens element. This condition helps ensure lens sensitivity and reduces assembly difficulty.

[0066] In an exemplary embodiment, the optical imaging lens may satisfy -2.0 < f4 / R8 < -1.5, where f4 is the effective focal length of the fourth lens element, and R8 is the radius of curvature of the image-side surface of the fourth lens element. This optical imaging lens satisfies the following conditions: -2.0 < f4 / R8 < -1.5, which helps ensure lens sensitivity and reduces assembly difficulty. More specifically, f4 and R8 may satisfy the following conditions: -1.9 < f4 / R8 < -1.5.

[0067] In an exemplary embodiment, the optical imaging lens may satisfy 6.0 < (R9 - R8) / (R9 + R8) < 19.5, where R9 is the radius of curvature of the object-side surface of the fifth lens element, and R8 is the radius of curvature of the image-side surface of the fourth lens element. This 6.0 < (R9 - R8) / (R9 + R8) < 19.5 ratio facilitates lens molding and reduces the risk of weld marks. More specifically, R9 and R8 may satisfy 6.3 < (R9 - R8) / (R9 + R8) < 19.5.

[0068] In an exemplary embodiment, the optical imaging lens may satisfy -5.5 < f5 / R10 < -4.0, where f5 is the effective focal length of the fifth lens element, and R10 is the radius of curvature of the image-side surface of the fifth lens element. This optical imaging lens satisfies the following conditions: -5.5 < f5 / R10 < -4.0, which helps ensure lens sensitivity and reduces assembly difficulty. More specifically, f5 and R10 may satisfy the following conditions: -5.2 < f5 / R10 < -4.2.

[0069] In an exemplary embodiment, the optical imaging lens may satisfy the relationship 1.0 < CT4 / T45 < 2.0, where CT4 is the center thickness of the fourth lens element on the optical axis, and T45 is the distance between the fourth and fifth lenses on the optical axis. The optical imaging lens satisfies the relationship 1.0 < CT4 / T45 < 2.0, which helps ensure uniform thickness distribution. More specifically, CT4 and T45 may satisfy the relationship 1.1 < CT4 / T45 < 1.7.

[0070] In an exemplary embodiment, the optical imaging lens may satisfy -2.0 < f1 / f2 < -1.0, where f1 is the effective focal length of the first lens element and f2 is the effective focal length of the second lens element. This requirement of -2.0 < f1 / f2 < -1.0 facilitates achieving both high imaging quality and good manufacturability. More specifically, f1 and f2 may satisfy -1.8 < f1 / f2 < -1.4.

[0071] In an exemplary embodiment, the optical imaging lens may satisfy the relationship 2.0 < CT4 / ET4 < 2.5, where CT4 is the center thickness of the fourth lens element along the optical axis, and ET4 is the edge thickness of the fourth lens element. This relationship facilitates correction of monochromatic aberrations to improve imaging quality and facilitates assembly and manufacturability. More specifically, CT4 and ET4 may satisfy the relationship 2.1 < CT4 / ET4 < 2.5.

[0072] In an exemplary embodiment, the optical imaging lens may satisfy -4.5 < 1 / SAG42 < -3.0, where SAG42 is the distance from the intersection of the image-side surface of the fourth lens element and the optical axis to the vertex of the effective radius of the image-side surface of the fourth lens element on the optical axis. This optical imaging lens satisfies the following conditions: -4.5 < 1 / SAG42 < -3.0, which effectively reduces the manufacturing difficulty of the optical imaging lens and facilitates molding processing. More specifically, SAG42 may satisfy the following conditions: -4.5 < 1 / SAG42 < -3.2.

[0073] In an exemplary embodiment, the optical imaging lens may satisfy Semi-FOV>50.0°, where Semi-FOV is half of the maximum field of view of the optical imaging lens. The optical imaging lens satisfies: Semi-FOV>50.0°, ensuring that sufficient light rays carrying content are incident on the imaging surface. More specifically, Semi-FOV may satisfy: Semi-FOV>54°.

[0074] In an exemplary embodiment, the optical imaging lens may satisfy RI>40%, where RI is the relative brightness (RI) corresponding to the maximum field of view of the optical imaging lens. When the optical imaging lens satisfies RI>40%, it can ensure that a relatively bright image is obtained under certain lighting conditions.

[0075] In an exemplary embodiment, the optical imaging lens may satisfy V2 - V3 > 30, where V2 is the Abbe number V2 of the second lens element, and V3 is the Abbe number V3 of the third lens element. This helps correct aberrations in the optical imaging lens. More specifically, V2 and V3 may satisfy V2 - V3 > 33.

[0076] In an exemplary embodiment, the optical imaging lens may satisfy 2.0 < SAG41 / SAG21 < 4.0, where SAG41 is the distance on the optical axis from the intersection of the object-side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fourth lens, and SAG21 is the distance on the optical axis from the intersection of the object-side surface of the second lens and the optical axis to the vertex of the effective radius of the object-side surface of the second lens. The optical imaging lens satisfies the following conditions: 2.0 < SAG41 / SAG21 < 4.0, which facilitates lens molding processing, improves imaging quality, and increases the maximum field of view of the optical imaging lens. More specifically, SAG41 and SAG21 may satisfy the following conditions: 2.1 < SAG41 / SAG21 < 3.9.

[0077] In an exemplary embodiment, the optical imaging lens may satisfy the requirement of 0.5 mm < D < 1.0 mm, where D is the radius of the aperture area of ​​the mirror aperture, and the mirror aperture is located on the object side of the optical imaging lens. The optical imaging lens satisfies the requirement of 0.5 mm < D < 1.0 mm, allowing some light to pass through the aperture area and enter the rear optical lens, while another portion is reflected from the reflective area surrounding the aperture and enter the rear optical lens, thereby increasing the detectable volume of the optical imaging lens. More specifically, D may satisfy the requirement of 0.6 mm < D < 1.0 mm.

[0078] In an exemplary embodiment, the optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0079] The optical imaging lens according to the above-mentioned embodiment of the present application can use multiple lenses, such as the five lenses described above. By rationally allocating the optical power, surface shape, center thickness of each lens, and the on-axis spacing between each lens, the volume of the optical imaging lens can be effectively reduced, the sensitivity of the optical imaging lens can be reduced, and the processability of the optical imaging lens can be improved, making the optical imaging lens more conducive to production and processing and applicable to portable electronic products. The optical imaging lens according to the embodiment of the present application also has at least one beneficial effect of good imaging quality, large field of view, and good processability. In addition, when used in a capsule endoscope, the optical imaging lens can meet the requirements of a front field of view of 60° and a rear field of view of 60° to 125°.

[0080] In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side surface and the image side surface of each lens in the first lens to the fifth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each lens in the first lens to the fifth lens are both aspherical mirror surfaces.

[0081] However, those skilled in the art will appreciate that the number of lenses comprising the optical imaging lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe five lenses as an example, the optical imaging lens is not limited to including five lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0082] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following reference Figures 1 to 3D The optical imaging lens according to Example 1 of the present application is described. Figure 1 A schematic structural diagram of an optical imaging lens according to Example 1 of the present application is shown.

[0085] like Figure 1 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0086] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0087] Figure 2 FIG1 shows a light trend diagram of the optical imaging lens according to Example 1 of the present application. Figure 2 As shown, the optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region and enters the rear optical lens, while another portion is reflected from the reflective region and enters the rear optical lens.

[0088] Table 1 shows the basic parameters of the optical imaging lens of Example 1, wherein the units of curvature radius, thickness and focal length are all millimeters (mm).

[0089]

[0090] Table 1

[0091] In Example 1, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.95 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 66.7°.

[0092] In Example 1, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces, and the surface shape of each aspherical lens is The following aspheric formulas can be used for definition, but are not limited to:

[0093] (1)

[0094] in, Aspheric surface along the optical axis at a height of h When the position is , the distance from the vertex of the aspherical surface is high; c is the paraxial curvature of the aspheric surface, c =1 / R (i.e., paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai Aspheric i Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical mirror surfaces S1 to S10 in Example 1.

[0095]

[0096] Table 2

[0097] Figure 3A The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 3B The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 3C The chromatic aberration curve of the optical imaging lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 3D The relative illumination curve of the optical imaging lens of Example 1 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. Figures 3A to 3D It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0098] Example 2

[0099] The following reference Figures 4 to 5D The optical imaging lens according to Example 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Example 1 will be omitted. Figure 4 A schematic structural diagram of an optical imaging lens according to Example 2 of the present application is shown.

[0100] like Figure 4 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0101] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive optical power, with its object-side surface S3 being 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0102] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0103] In Example 2, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.75 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 54.5°.

[0104] Table 3 shows the basic parameters of the optical imaging lens of Example 2, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 4 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 2, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0105]

[0106] Table 3

[0107]

[0108] Table 4

[0109] Figure 5A The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 5B The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 5C The chromatic aberration curve of the optical imaging lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 5D The relative illumination curve of the optical imaging lens of Example 2 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 5A to 5D It can be seen that the optical imaging lens provided in Example 2 can achieve good imaging quality.

[0110] Example 3

[0111] The following reference Figures 6 to 7D The optical imaging lens according to Example 3 of the present application is described. Figure 6 A schematic structural diagram of an optical imaging lens according to Example 3 of the present application is shown.

[0112] like Figure 6 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0113] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0114] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0115] In Example 3, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.95 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 66.7°.

[0116] Table 5 shows the basic parameters of the optical imaging lens of Example 3, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 6 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 3, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0117]

[0118] Table 5

[0119]

[0120] Table 6

[0121] Figure 7A The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 7B The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 7C The chromatic aberration curve of the optical imaging lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 7DThe relative illumination curve of the optical imaging lens of Example 3 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 7A to 7D It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0122] Example 4

[0123] The following reference Figures 8 to 9D An optical imaging lens according to Example 4 of the present application is described. Figure 8 A schematic structural diagram of an optical imaging lens according to Example 4 of the present application is shown.

[0124] like Figure 8 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0125] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0126] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0127] In Example 4, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.95 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 66.7°.

[0128] Table 7 shows the basic parameters of the optical imaging lens of Example 4, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 8 shows the high-order coefficients of the various aspheric mirror surfaces that can be used in Example 4, where the surface shapes of the various aspheric surfaces can be defined by formula (1) given in Example 1 above.

[0129]

[0130] Table 7

[0131]

[0132] Table 8

[0133] Figure 9A The axial chromatic aberration curve of the optical imaging lens of Example 4 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 9B The astigmatism curve of the optical imaging lens of Example 4 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 9C The chromatic aberration curve of the optical imaging lens of Example 4 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 9D The relative illumination curve of the optical imaging lens of Example 4 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 9A to 9D It can be seen that the optical imaging lens provided in Example 4 can achieve good imaging quality.

[0134] Example 5

[0135] The following reference Figures 10 to 11D The optical imaging lens according to Example 5 of the present application is described. Figure 10 A schematic structural diagram of an optical imaging lens according to Example 5 of the present application is shown.

[0136] like Figure 10 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0137] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0138] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0139] In Example 5, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.95 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 66.7°.

[0140] Table 9 shows the basic parameters of the optical imaging lens of Example 5, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 10 shows the high-order coefficients of each aspherical mirror surface that can be used in Example 5, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0141]

[0142] Table 9

[0143]

[0144] Table 10

[0145] Figure 11A The axial chromatic aberration curve of the optical imaging lens of Example 5 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 11B The astigmatism curve of the optical imaging lens of Example 5 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 11C The chromatic aberration curve of the optical imaging lens of Example 5 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 11D The relative illumination curve of the optical imaging lens of Example 5 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 11A to 11D It can be seen that the optical imaging lens provided in Example 5 can achieve good imaging quality.

[0146] Example 6

[0147] The following reference Figures 12 to 13D The optical imaging lens according to Example 6 of the present application is described. Figure 12 A schematic structural diagram of an optical imaging lens according to Example 6 of the present application is shown.

[0148] like Figure 12As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0149] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0150] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0151] In Example 6, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 1.95 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 66.9°.

[0152] Table 11 shows the basic parameters of the optical imaging lens of Example 6, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 12 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 6, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0153]

[0154] Table 11

[0155]

[0156] Table 12

[0157] Figure 13A The axial chromatic aberration curve of the optical imaging lens of Example 6 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 13BThe astigmatism curve of the optical imaging lens of Example 6 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 13C The chromatic aberration curve of the optical imaging lens of Example 6 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 13D The relative illumination curve of the optical imaging lens of Example 6 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 13A to 13D It can be seen that the optical imaging lens provided in Example 6 can achieve good imaging quality.

[0158] Example 7

[0159] The following reference Figures 14 to 15D An optical imaging lens according to Example 7 of the present application is described. Figure 14 A schematic structural diagram of an optical imaging lens according to Example 7 of the present application is shown.

[0160] like Figure 14 As shown, the optical imaging lens comprises, in order from the object side to the image side along the optical axis: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a filter E6.

[0161] The first lens E1 has negative optical power, with its object-side surface S1 being concave 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 positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The filter E6 has an object-side surface S11 and an image-side surface S12. The optical imaging lens has an imaging surface S13, and light from an object sequentially passes through each surface S1 to S12 and is ultimately imaged on the imaging surface S13.

[0162] The optical imaging lens also includes a mirror aperture located on its object side. The mirror aperture has an aperture region with a radius D located near the optical axis and a reflective region surrounding the aperture region. Some light is transmitted through the aperture region into the rear optical lens, while another portion is reflected from the reflective region into the rear optical lens.

[0163] In Example 7, the total effective focal length f of the optical imaging lens is 1.66 mm, the distance TTL on the optical axis from the object-side surface S1 of the first lens element E1 to the imaging surface S13 is 4.05 mm, half the diagonal length of the effective pixel area on the imaging surface S13 ImgH is 2.00 mm, and half the maximum field of view Semi-FOV of the optical imaging lens is 70.8°.

[0164] Table 13 shows the basic parameters of the optical imaging lens of Example 7, where the units of curvature radius, thickness, and focal length are all in millimeters (mm). Table 14 shows the high-order coefficients of the various aspherical mirror surfaces that can be used in Example 7, where the surface shape of each aspherical surface can be defined by formula (1) given in Example 1 above.

[0165]

[0166] Table 13

[0167]

[0168] Table 14

[0169] Figure 15A The axial chromatic aberration curve of the optical imaging lens of Example 7 is shown, which indicates the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 15B The astigmatism curve of the optical imaging lens of Example 7 is shown, which represents the meridional field curvature and the sagittal field curvature. Figure 15C The chromatic aberration curve of the optical imaging lens of Example 7 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. Figure 15D The relative illumination curve of the optical imaging lens of Example 7 is shown, which represents the relative illumination corresponding to different image heights on the imaging surface. 15A to 15D It can be seen that the optical imaging lens provided in Example 7 can achieve good imaging quality.

[0170] In summary, Examples 1 to 7 respectively satisfy the relationships shown in Table 15.

[0171]

[0172] Table 15

[0173] This application also provides an imaging device, whose electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into an electronic device such as a capsule endoscope. The imaging device is equipped with the optical imaging lens described above.

[0174] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of protection provided by this application is not limited to technical solutions formed by a specific combination of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the scope of this application. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Along the optical axis from the object side to the image side, they include: a first lens having negative optical power and a concave image-side surface; Aperture; a second lens having positive refractive power, its object-side surface being convex and its image-side surface being convex; a third lens element having negative optical power and a concave image-side surface; a fourth lens element having positive refractive power and a convex image-side surface; a fifth lens element having negative optical power, whose object-side surface is convex and whose image-side surface is concave; The optical imaging lens has five lenses with optical power. A distance SAG32 from the intersection of the image-side surface of the third lens and the optical axis to the vertex of the effective radius of the image-side surface of the third lens on the optical axis and a distance SAG11 from the intersection of the object-side surface of the first lens and the optical axis to the vertex of the effective radius of the object-side surface of the first lens on the optical axis satisfy the following conditions: 0.91≤SAG32 / SAG11≤2.13; The curvature radius R9 of the object-side surface of the fifth lens and the curvature radius R8 of the image-side surface of the fourth lens satisfy: 6.39≤(R9-R8) / (R9+R8)≤19.41; The effective focal length f1 of the first lens and the effective focal length f2 of the second lens satisfy the following: -1.8<f1 / f2≤-1.45; and At least one of the mirror surfaces from the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical surface.

2. The optical imaging lens according to claim 1, wherein: A curvature radius R3 of the object-side surface of the second lens and a curvature radius R4 of the image-side surface of the second lens satisfy: 1.94≤(R3-R4) / (R3+R4)≤2.

25.

3. The optical imaging lens according to claim 1, wherein: The total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy the following: 2.3<f / EPD≤2.

5.

4. The optical imaging lens according to claim 1, wherein: The effective focal length f3 of the third lens and the curvature radius R6 of the image-side surface of the third lens satisfy: -2.5≤f3 / R6≤-1.

5.

5. The optical imaging lens according to claim 1, wherein: The effective focal length f5 of the fifth lens and the curvature radius R10 of the image-side surface of the fifth lens satisfy the following relationship: -5.2<f5 / R10≤-4.

25.

6. The optical imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis and a distance T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: 1.20≤CT4 / T45≤1.

62.

7. The optical imaging lens according to claim 1, wherein: A center thickness CT4 of the fourth lens on the optical axis and an edge thickness ET4 of the fourth lens satisfy the following: 2.19≤CT4 / ET4<2.

5.

8. The optical imaging lens according to claim 1, wherein: A distance SAG42 from an intersection of the image side surface of the fourth lens and the optical axis to a vertex of an effective radius of the image side surface of the fourth lens on the optical axis satisfies: -4.5<1 / SAG42<-3.

2.

9. The optical imaging lens according to claim 1, wherein: Half of the maximum field of view (Semi-FOV) of the optical imaging lens satisfies the following: 54.5°≤Semi-FOV≤70.8°.

10. The optical imaging lens according to claim 1, wherein: The relative brightness RI corresponding to the maximum field angle of the optical imaging lens satisfies: RI>40%.

11. The optical imaging lens according to claim 1, wherein: The Abbe number V2 of the second lens and the Abbe number V3 of the third lens satisfy: 33<V2-V3≤33.

2.

12. The optical imaging lens according to claim 1, wherein: The distance SAG41 from the intersection of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens on the optical axis and the distance SAG21 from the intersection of the object side surface of the second lens and the optical axis to the effective radius vertex of the object side surface of the second lens on the optical axis satisfy: 2.1<SAG41 / SAG21≤3.

81.

13. The optical imaging lens according to any one of claims 1 to 12, wherein: A mirror hole including a hole area is provided on the object side of the optical imaging lens, wherein a radius D of the hole area satisfies: 0.65 mm≤D≤0.95 mm.

14. The optical imaging lens according to claim 1, wherein: The effective focal length f4 of the fourth lens and the curvature radius R8 of the image-side surface of the fourth lens satisfy: -1.87≤f4 / R8≤-1.59.

Images