Optical imaging lens

Abstract

The present invention provides an optical imaging lens. The optical imaging lens includes a lens barrel, a lens group and a spacer group disposed within the lens barrel, the lens group including first to sixth lenses, the spacer group including at least a first spacer, the first spacer being located between the first lens and the second lens and partially contacting the image-side surface of the first lens; the effective focal length f of the optical imaging lens and half of the maximum field of view (HFOV) of the optical imaging lens satisfy the following conditions: 9.14 mm ≤ f × tan(HFOV) < 13.05 mm; and the inner diameter d1s of the object-side surface of the first spacer, the radius of curvature R1 of the object-side surface of the first lens, and the Abbe number V1 of the first lens satisfy the following conditions: 13.65 ≤ d1s / R1 × V1 ≤ 15.25. The present invention solves the problem of severe stray light in optical imaging lenses in the prior art, which results from the need to meet the requirements of a wide field of view.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical imaging lens. Background Art

[0002] With the development of electronic devices, the application scenarios of the camera function of electronic devices in daily life are gradually increasing, and users' requirements for shooting quality are gradually increasing. For example, due to the advantages of wide-angle lenses and ultra-wide-angle lenses with wide field of view and large field of view, the demand for them in daily life is gradually increasing.

[0003] However, an optical imaging lens with a wide field of view has a relatively large object-side port diameter, and many light rays enter the lens from different angles. Some of these large-angle light rays are deflected by the first lens element and directed toward the inner diameter of the first spacer element, where they are reflected by the inner diameter of the first spacer element, forming stray light. Furthermore, some of these light rays branch off at the edge of the first lens element's optically effective diameter, forming stray light. This stray light can significantly impact the image, causing, for example, image distortion and localized blurring.

[0004] That is to say, in the prior art, the optical imaging lens has a serious problem of stray light caused by the need to meet the large field of view. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of severe stray light caused by the optical imaging lens in the prior art in order to meet the requirement of a large field of view.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an optical imaging lens, comprising a lens barrel, a lens group and a spacer group disposed within the lens barrel, wherein the lens group comprises six lenses, the lens group comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis, the first lens having negative focal power, the object-side surface of the first lens being convex, and the image-side surface of the first lens being concave, the third lens having positive focal power, the object-side surface of the third lens being convex, and the image-side surface of the third lens being convex, the fourth lens having negative focal power, the image-side surface of the fourth lens being concave, the fifth lens having positive focal power, the image-side surface of the fifth lens being convex, and the sixth lens having negative focal power; the spacer group comprising at least a first spacer, the first spacer being located between the first lens and the second lens and partially contacting the image-side surface of the first lens; the effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14mm≤f×tan(HFOV)<13.05mm; the inner diameter d1s of the object-side surface of the first spacer element, the curvature radius R1 of the object-side surface of the first lens, and the Abbe number V1 of the first lens satisfy the following conditions: 13.65≤d1s / R1×V1≤15.25.

[0007] According to another aspect of the present invention, an optical imaging lens is provided, comprising a lens barrel and a lens group and a spacer element group disposed within the lens barrel, wherein the lens group comprises six lenses, the lens group comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis, the first lens having negative optical power, the object side surface of the first lens being convex, the image side surface of the first lens being concave, and the sixth lens having negative optical power; the spacer element group comprises at least a first spacer element and a second spacer element, the first spacer element being located between the first lens and the image side surface. The second spacer element is located between the second lens and the third lens and is in contact with the image side surface of the first lens. The inner diameter d1s of the object side surface of the first spacer element and the inner diameter d2m of the image side surface of the second spacer element satisfy the following: 2.60<d1s / d2m≤3.55; the spacing distance EP12 between the first spacer element and the second spacer element on the optical axis, the center thickness CT2 of the second lens, and the combined focal length f12 of the first lens and the second lens satisfy the following: 0.69≤(CT2+EP12) / |f12|<3.05.

[0008] Furthermore, the inner diameter d0s of the object-side end surface of the lens barrel, the inner diameter d1s of the object-side surface of the first spacer element, and the effective focal length f1 of the first lens satisfy the following relationship: -2.40≤(d0s-d1s) / f1<-1.25.

[0009] Furthermore, the effective focal length f1 of the first lens, and the spacing distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacing element on the optical axis satisfy: -2.70≤f1 / EP01<-1.80.

[0010] Furthermore, the spacing distance EP01 between the object-side end face of the lens barrel and the object-side face of the first spacer element on the optical axis, the center thickness CT1 of the first lens on the optical axis, the air spacing T12 between the first lens and the second lens on the optical axis, and the refractive index N1 of the first lens satisfy the following conditions: 1.95<(CT1+T12) / EP01×N1≤2.71.

[0011] Furthermore, an outer diameter D1s of the object-side surface of the first spacer element, an inner diameter d1s of the object-side surface of the first spacer element, and an air gap T12 between the first lens and the second lens on the optical axis satisfy: 4.60<(D1s-d1s) / T12≤6.55.

[0012] Furthermore, the distance L from the object-side end surface of the lens barrel to the image-side end surface of the lens barrel, the center thickness CT2 of the second lens on the optical axis, and the refractive index N2 of the second lens satisfy the following relationship: 5.19≤L / CT2×N2≤5.90.

[0013] Furthermore, the distance L from the object side end surface of the lens barrel to the image side end surface of the lens barrel and the center distance Tr5r10 between the object side surface of the third lens and the image side surface of the fifth lens on the optical axis satisfy: 5.25<L / Tr5r10<9.10.

[0014] Furthermore, the inner diameter d0m of the image-side end surface of the lens barrel and the curvature radius R12 of the image-side surface of the sixth lens satisfy the following relationship: 0.70<d0m / |R12|≤2.66.

[0015] Furthermore, a distance L from the object-side end surface of the lens barrel to the image-side end surface of the lens barrel and an air gap T56 between the fifth lens and the sixth lens on the optical axis satisfy 3.78≤L / T56≤7.11.

[0016] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens, and the spacing distance EP01 between the object side end face of the lens barrel and the object side face of the first spacer element on the optical axis, and the spacing distance EP12 between the first spacer element and the second spacer element on the optical axis satisfy: 1.50<EP12 / EP01<2.33.

[0017] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The spacing distance EP12 between the first spacer element and the second spacer element on the optical axis and the combined focal length f12 of the first lens and the second lens satisfy: 0.25<EP12 / |f12|≤1.56.

[0018] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The outer diameter D1s of the object side surface of the first spacer element, the outer diameter D2s of the object side surface of the second spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element on the optical axis satisfy the following conditions: 0.04≤(D1s-D2s) / EP12<1.50.

[0019] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens, and the inner diameter d2s of the object side of the second spacer element, the center thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy the following: 0.35≤d2s / (CT2+CP2)<0.85.

[0020] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens, and the center thickness CT2 of the second lens on the optical axis and the outer diameter D2s of the object side of the second spacer element satisfy: 0.30<CT2 / D2s<0.85.

[0021] Furthermore, the spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The outer diameter D2m of the image side surface of the second spacer element, the inner diameter d2m of the image side surface of the second spacer element, and the curvature radius R5 of the object side surface of the third lens satisfy: 0.78≤(D2m-d2m) / R5<3.60.

[0022] Furthermore, the spacer element group also includes a second spacer element and a third spacer element, the second spacer element is located between the second lens and the third lens, the third spacer element is located between the third lens and the fourth lens and is in contact with the image side surface of the third lens, and the inner diameter d2m of the image side surface of the second spacer element, the inner diameter d3s of the object side surface of the third spacer element, and the combined focal length f23 of the second lens and the third lens satisfy: -2.40<(d2m-d3s) / f23×10<-0.7.

[0023] Furthermore, the spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the object side surface of the fourth lens. The inner diameter d4s of the object side surface of the fourth spacer element, the curvature radius R8 of the image side surface of the fourth lens, and the refractive index N4 of the fourth lens satisfy: 1.20<d4s / R8×N4<2.05.

[0024] According to the technical solution of the present invention, an optical imaging lens comprises a lens barrel and a lens group and a spacer element group arranged in the lens barrel, wherein the lens group comprises six lenses, and 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 the object side to the image side along the optical axis, wherein the first lens has negative focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave, the third lens has positive focal power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex, the fourth lens has negative focal power, the image side surface of the fourth lens is concave, the fifth lens has positive focal power, and the sixth lens has a negative focal power. The image-side surface of the fifth lens is convex, and the sixth lens has negative optical power; the spacer element group includes at least a first spacer element, which is located between the first lens and the second lens and partially contacts the image-side surface of the first lens; the effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14mm≤f×tan(HFOV)<13.05mm; the inner diameter d1s of the object-side surface of the first spacer element, the curvature radius R1 of the object-side surface of the first lens, and the Abbe number V1 of the first lens satisfy the following conditions: 13.65≤d1s / R1×V1≤15.25.

[0025] The optical imaging lens of the present application includes a lens barrel, six lenses and at least one spacer element. When the effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14mm≤f×tan(HFOV)<13.05mm, the field of view of the optical imaging lens is an ultra-wide-angle lens in the range of 152° to 160°. In the design of ultra-wide-angle lenses, stray light is a common problem. In order to ensure that the optical imaging lens meets the ultra-wide-angle requirement while reducing the generation of stray light, the present application constrains d1s / R1×V1 within a reasonable range. By controlling the curvature radius of the object side of the first lens and the material of the first lens, the deflection effect of the first lens on light can be controlled. At the same time, the inner diameter of the first spacer element is controlled to control the transmission path of light, reducing the light deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light, and at the same time ensuring that light converges and reduces scattering, further reducing the generation of stray light, and ensuring the imaging quality of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 A dimensioned diagram showing an optical imaging lens according to an optional embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of an optical imaging lens according to embodiment 1-1 of the present invention is shown;

[0029] Figure 3 A schematic structural diagram of an optical imaging lens according to Embodiment 1-2 of the present invention is shown;

[0030] Figure 4 Schematic diagrams showing the structures of optical imaging lenses according to embodiments 1-3 of the present invention are shown;

[0031] Figures 5 to 8 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to the first embodiment of the present invention are respectively shown;

[0032] Figure 9 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-1 of the present invention is shown;

[0033] Figure 10 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-2 of the present invention is shown;

[0034] Figure 11 A schematic structural diagram of an optical imaging lens according to Embodiment 2-3 of the present invention is shown;

[0035] Figures 12 to 15 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to the second embodiment of the present invention are respectively shown;

[0036] Figure 16 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-1 of the present invention is shown;

[0037] Figure 17 2. A schematic structural diagram of an optical imaging lens according to embodiment 2-2 of the present invention is shown;

[0038] Figure 18 A schematic structural diagram of an optical imaging lens according to Embodiment 2-3 of the present invention is shown;

[0039] Figures 19 to 22 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical imaging lens according to the second embodiment of the present invention are respectively shown;

[0040] Figure 23 A light path diagram of an optical imaging lens according to an optional embodiment of the present invention is shown;

[0041] Figure 24 Shown Figure 23 Stray light spot diagram of the optical imaging lens;

[0042] Figure 25 shows a light path diagram of an optical imaging lens according to another optional embodiment of the present invention;

[0043] Figure 26 Out Figure 25 Stray light spot diagram of the optical imaging lens;

[0044] Figure 27 An optical path diagram of an example optical imaging lens is shown;

[0045] Figure 28 Out Figure 27 Stray light spot diagram of the optical imaging lens;

[0046] Figure 29 shows a light path diagram of another example optical imaging lens;

[0047] Figure 30 Out Figure 29 Stray light spot diagram of the optical imaging lens.

[0048] The above drawings include the following reference numerals:

[0049] P0, lens barrel; E1, first lens; P1, first spacer; E2, second lens; P2, second spacer; P2b, second auxiliary spacer; E3, third lens; P3, third spacer; P3b, third auxiliary spacer; E4, fourth lens; P4, fourth spacer; E5, fifth lens; P5, fifth spacer; P5b, fifth auxiliary spacer; E6, sixth lens; S1, object-side surface of the first lens; S2, image-side surface of the first lens; S3, object-side surface of the second lens; S4, image-side surface of the second lens; S5, object-side surface of the third lens; S6, image-side surface of the third lens; S7, object-side surface of the fourth lens; S8, image-side surface of the fourth lens; S9, object-side surface of the fifth lens; S10, image-side surface of the fifth lens; S11, object-side surface of the sixth lens; S12, image-side surface of the sixth lens. DETAILED DESCRIPTION

[0050] 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 invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0052] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0053] 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.

[0054] 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.

[0055] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is undefined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is undefined, it means that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to the judgment method of ordinary knowledge in this field, using the positive and negative R value (R refers to the radius of curvature of the paraxial region, usually refers to the R value in the lens database (lens data) in optical software) to determine the convexity and concavity. For the object side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave. For the image side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. In this application, the left side is the object side and the right side is the image side.

[0056] In order to solve the problem of serious stray light caused by the optical imaging lens in the prior art in order to meet the requirement of a large field of view, the present invention provides an optical imaging lens.

[0057] like Figures 1 to 22 As shown, the optical imaging lens includes a lens barrel and a lens group and a spacer element group arranged in the lens barrel, the lens group consists of six lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis, the first lens has negative focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave, the third lens has positive focal power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex, the fourth lens has negative focal power, the image side surface of the fourth lens is concave, the fifth lens has positive focal power, and the The image-side surface is convex, and the sixth lens has negative optical power; the spacer element group includes at least a first spacer element, which is located between the first lens and the second lens and partially contacts the image-side surface of the first lens; the effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14mm≤f×tan(HFOV)<13.05mm; the inner diameter d1s of the object-side surface of the first spacer element, the curvature radius R1 of the object-side surface of the first lens, and the Abbe number V1 of the first lens satisfy the following conditions: 13.65≤d1s / R1×V1≤15.25.

[0058] The optical imaging lens of the present application includes a lens barrel, six lenses and at least one spacer element. When the effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14mm≤f×tan(HFOV)<13.05mm, the field of view of the optical imaging lens is an ultra-wide-angle lens in the range of 152° to 160°. In the design of ultra-wide-angle lenses, stray light is a common problem. In order to ensure that the optical imaging lens meets the ultra-wide-angle requirement while reducing the generation of stray light, the present application constrains d1s / R1×V1 within a reasonable range. By controlling the curvature radius of the object side of the first lens and the material of the first lens, the deflection effect of the first lens on light can be controlled. At the same time, the inner diameter of the first spacer element is controlled to control the transmission path of light, reducing the light deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light, and at the same time ensuring that light converges and reduces scattering, further reducing the generation of stray light, and ensuring the imaging quality of the optical imaging lens.

[0059] In an exemplary embodiment, the lens barrel, lens group, and spacer element group of the optical imaging lens are configured as described above, and by setting the above conditional expression d1s / R1×V1 to satisfy different numerical ranges, the following four optical imaging lens solutions are provided.

[0060] In the optical imaging lens of the first solution, d1s / R1×V1=14. In the optical imaging lens of the first solution, d1s / R1×V1 is in the range of 13.65 to 15.25, and the optical path diagram and stray light spot diagram of the optical imaging lens of this solution are respectively as follows: Figure 23 and Figure 24 As shown, the light emitted from the first lens passes through the first spacer element smoothly, does not bifurcate at the edge of the effective diameter, and is not deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light, reducing stray light spots, and achieving clear imaging.

[0061] In the optical imaging lens of the second solution, d1s / R1×V1=15. In the optical imaging lens of the second solution, d1s / R1×V1 is in the range of 13.65 to 15.25, and the optical path diagram and stray light spot diagram of the optical imaging lens of this solution are respectively as follows: Figure 25 and Figure 26 As shown, the light emitted from the first lens passes through the first spacer element smoothly, does not bifurcate at the edge of the effective diameter, and is not deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light, reducing stray light spots, and achieving clear imaging.

[0062] In the third optical imaging lens, d1s / R1×V1=12. In the third optical imaging lens, d1s / R1×V1 is less than the lower limit value defined by 13.65≤d1s / R1×V1≤15.25, and the optical path diagram and stray light spot diagram of the optical imaging lens of this solution are respectively as follows: Figure 27 and Figure 28 As shown, the imaging light is deflected to the inner diameter of the first spacing element, and the light is reflected at the inner diameter position of the first spacing element to form stray light and generate a stray light spot with higher energy.

[0063] In the fourth optical imaging lens, d1s / R1×V1=16. In the fourth optical imaging lens, d1s / R1×V1 is greater than the upper limit value defined by 13.65≤d1s / R1×V1≤15.25, and the optical path diagram and stray light spot diagram of the optical imaging lens of this solution are respectively as follows: Figure 29 and Figure 30 As shown, the imaging light is bifurcated at the edge of the effective path to form stray light, generating a stray light spot with higher energy.

[0064] From the optical imaging lenses of the above four schemes, it can be seen that when d1s / R1×V1 is in the range of 13.65 to 15.25, less stray light is generated and the image quality is high, while when d1s / R1×V1 is less than 13.65 or greater than 15.26, severe stray light will occur.

[0065] exist Figure 24 、 Figure 26 、 Figure 28 and Figure 30 In the stray light spot diagram, below the X-axis is a cross cursor X-axis energy display box. And to the right of the Y-axis is a cross cursor Y-axis energy display box. In the stray light spot diagram, the stray light with high energy is displayed.

[0066] It should be noted that this application limits d1s / R1×V1 to a reasonable range, which can control the deflection effect of the first lens on light to solve the problem of stray light in ultra-wide-angle lenses. When d1s / R1×V1 meets the above range, the risk of stray light can be reduced, and it does not depend on the optical power and surface shape of other lenses. The optical power and surface shape of other lenses are further optimization of the optical imaging lens on this basis. The other lenses can be positive or negative according to the actual design requirements of the optical system, and the surface shape of each lens can also be convex or concave according to the design requirements of the optical system. When the optical system meets the following requirements: 9.14mm≤f×tan(HFOV)<13.05mm; 13.65≤d1s / R1×V1≤15.25, the optical imaging lens can meet the requirements of a large field of view while reducing stray light.

[0067] For example, in some optional embodiments, the first lens has negative optical power, which can appropriately diverge the light entering the first lens, thereby ensuring a wide field of view for the optical imaging lens. For another example, in some optional embodiments, the third lens has positive optical power, which can appropriately converge the light, allowing it to smoothly transition to the rear, while also balancing the aberrations introduced by the negative lens in front, thereby improving image quality. For another example, in some optional embodiments, the fourth lens has negative optical power, which can further diverge the light, allowing it to smoothly transition to the rear. For another example, in some optional embodiments, the fifth lens has positive optical power, which can balance the aberrations introduced by the negative lens in front, thereby improving image quality. For another example, in some optional embodiments, the sixth lens has negative optical power, which can appropriately diverge the light, thereby ensuring a wide field of view for the optical imaging lens. For another example, in some optional embodiments, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave. For another example, in some optional embodiments, the object-side surface of the third lens is convex, and the image-side surface of the third lens is convex. For example, in some optional embodiments, the image side surface of the fourth lens is concave, and the image side surface of the fifth lens is convex. By properly constraining the surface shape of each lens, it is helpful to properly constrain the light path, ensure a smooth transition of light, and correct aberrations.

[0068] In some optional embodiments, the relationship between the inner diameter d0s of the object-side end surface of the lens barrel, the inner diameter d1s of the object-side surface of the first spacer element, and the effective focal length f1 of the first lens satisfies the following: -2.40 ≤ (d0s - d1s) / f1 < -1.25. By constraining the relationship between the inner diameter d0s of the object-side end surface of the lens barrel, the inner diameter d1s of the object-side surface of the first spacer element, and the effective focal length f1 of the first lens, light can be transmitted along a predetermined path, while ensuring the amount of light entering the optical imaging lens and the relative illumination of the optical imaging lens. Furthermore, the flange width of the first lens can be controlled, ensuring assembly stability.

[0069] In some optional embodiments, the effective focal length f1 of the first lens and the separation distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacer element on the optical axis satisfy the following relationship: -2.70 ≤ f1 / EP01 < -1.80. By constraining f1 / EP01 within a reasonable range, the edge thickness of the first lens and the adhesive dispensing space can be constrained, ensuring that a sufficient amount of adhesive can be accommodated at the edge of the first lens. This, in turn, ensures the assembly stability of the first lens and the optical imaging lens meets the push-off force requirements. Furthermore, the optical performance changes of the optical imaging lens before and after high-temperature and high-humidity reliability testing meet the requirements, thereby improving the reliability of the optical imaging lens. Furthermore, constraining the effective focal length of the first lens ensures the deflection angle of light rays at the edge of the first lens's field of view, reducing the sensitivity of optical performance.

[0070] In some optional embodiments, the optical axis spacing distance EP01 between the object-side end face of the lens barrel and the object-side face of the first spacer element, the optical axis center thickness CT1 of the first lens, the optical axis air gap T12 between the first lens and the second lens, and the refractive index N1 of the first lens satisfy the following conditions: 1.95 < (CT1 + T12) / EP01 × N1 ≤ 2.71. By constraining (CT1 + T12) / EP01 × N1 within a reasonable range, the shape of the first lens can be constrained, improving its manufacturing feasibility, while also ensuring its relative position and enhancing assembly stability. By constraining the material of the first lens and the optical path length of light traveling through the first lens, the spot energy of optical ghost images generated by the first lens at the effective diameter can be effectively reduced, thereby ensuring the imaging quality of the optical imaging lens.

[0071] In some optional embodiments, the outer diameter D1s of the object-side surface of the first spacer element, the inner diameter d1s of the object-side surface of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following relationship: 4.60 < (D1s - d1s) / T12 ≤ 6.55. By constraining (D1s - d1s) / T12 within a reasonable range, stray light generated by the flange portion of the image-side surface of the first lens can be intercepted by the first spacer element. This also prevents the first lens from floating after baking due to an excessive gap between the first and second lenses, effectively ensuring the stability of the first lens assembly and thereby improving the imaging quality of the optical imaging lens.

[0072] In some optional embodiments, the distance L from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the center thickness CT2 of the second lens on the optical axis, and the refractive index N2 of the second lens satisfy the following relationship: 5.19 ≤ L / CT2 × N2 ≤ 5.90. By constraining L / CT2 × N2 within a reasonable range, the proportion of the center thickness of the second lens to the lens barrel length can be constrained, which facilitates distinguishing differences in the outer profile of the entire lens barrel structure, effectively controlling the fit between the optical imaging lens and the module, and rationally arranging the position of the spacer elements, thereby facilitating the miniaturization of the optical imaging lens as a whole. Furthermore, suitable materials can ensure that the center thickness and surface shape of the second lens are minimized before and after high-temperature and high-humidity reliability testing, thereby ensuring stable optical performance.

[0073] In some optional embodiments, the distance L between the object-side end face of the lens barrel and the image-side end face of the lens barrel, and the center-to-center distance Tr5r10 between the object-side surface of the third lens element and the image-side surface of the fifth lens element on the optical axis satisfy the following relationship: 5.25 < L / Tr5r10 < 9.10. By constraining L / Tr5r10 within a reasonable range, the distance between the object-side surface of the third lens element and the image-side surface of the fifth lens element can be constrained, ensuring a reasonable arrangement of the optical elements in the middle section of the optical imaging lens. This improves the resolution of the optical imaging lens while achieving miniaturization, thus achieving a balance between high image quality and miniaturization.

[0074] In some optional embodiments, the inner diameter d0m of the image-side end surface of the lens barrel and the radius of curvature R12 of the image-side surface of the sixth lens element satisfy the following relationship: 0.70 < d0m / |R12| ≤ 2.66. By constraining d0m / |R12| within a reasonable range, the deflection angle of light at the image-side surface of the sixth lens element can be controlled, reducing the amount of light directed toward the inner wall of the lens barrel. This allows imaging light to smoothly pass through the image-side end surface of the lens barrel toward the imaging surface, reducing the generation of stray light. At the same time, constraining the inner diameter of the image-side end surface of the lens barrel ensures that stray light generated by the inclined surface of the inner wall of the lens barrel near the image side does not reach the imaging surface, thereby ensuring the imaging quality of the optical imaging lens and further improving the clarity of the image formed by the optical imaging lens.

[0075] In some optional embodiments, the distance L between the object-side end face of the lens barrel and the image-side end face of the lens barrel, and the air spacing T56 between the fifth and sixth lenses on the optical axis satisfy the following relationship: 3.78≤L / T56≤7.11. By constraining L / T56 within a reasonable range, the degree of post-baking floating of the sixth lens can be limited, which helps ensure the stability of the optical imaging lens. It also reduces sensitivity issues caused by an unreasonable air spacing between the two lenses, and reduces the lens' sensitivity to high-temperature and high-humidity gases, thereby ensuring the stability of the optical imaging lens's static back field curvature performance during baking.

[0076] In some optional embodiments, the spacer assembly further includes a second spacer positioned between the second lens and the third lens. The distance EP01 between the object-side end face of the lens barrel and the object-side face of the first spacer, and the distance EP12 between the first spacer and the second spacer, along the optical axis, satisfy the following relationship: 1.50 < EP12 / EP01 < 2.33. By constraining EP12 / EP01 within a reasonable range, the ratio of the edge thickness of the first lens to the edge thickness of the second lens can be indirectly constrained, ensuring that the edge thicknesses of the first and second lenses are close, thus preventing significant stress concentration during assembly. Furthermore, the relative positions of the first and second lenses can be controlled while maintaining the dimensions of the lens barrel, thereby improving assembly stability.

[0077] In some optional embodiments, the spacer element assembly further includes a second spacer element positioned between the second lens and the third lens. The separation distance EP12 between the first and second spacer elements on the optical axis and the combined focal length f12 of the first and second lenses satisfy the following relationship: 0.25 < EP12 / |f12| ≤ 1.56. By constraining EP12 / |f12| within a reasonable range, light converging at the aperture after passing through the first and second lenses is ensured, reducing stray light and improving the imaging quality of the optical imaging lens. This also allows more light to enter the rear optical system, ensuring image brightness and further enhancing the visual comfort of the image.

[0078] In some optional embodiments, the spacer element assembly further includes a second spacer element positioned between the second lens and the third lens. The outer diameter D1s of the object-side surface of the first spacer element, the outer diameter D2s of the object-side surface of the second spacer element, and the separation distance EP12 between the first and second spacer elements on the optical axis satisfy the following conditions: 0.04 ≤ (D1s - D2s) / EP12 < 1.50. By constraining (D1s - D2s) / EP12 within a reasonable range, the outer diameters of the first and second lenses can be kept similar, while the edge thickness of the second lens is maintained, thereby ensuring the structural strength of the second lens. This helps reduce the maximum stress on the second lens when subjected to axial stress during the assembly process of the optical imaging lens, thereby reducing the risk of deformation of the second lens, improving assembly stability, and ensuring imaging quality.

[0079] In some optional embodiments, the spacer assembly further includes a second spacer positioned between the second lens and the third lens. The inner diameter d2s of the object-side surface of the second spacer, the center thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer satisfy the following relationship: 0.35 ≤ d2s / (CT2 + CP2) < 0.85. By constraining d2s / (CT2 + CP2) within a reasonable range, the impact of manufacturing tolerances on the center thickness and flange surface flatness of the second lens on the optical back focus of the optical imaging lens can be reduced. This effectively prevents the optical back focus from exceeding tolerances due to large lens tolerances during assembly. Furthermore, it helps to intercept edge stray light generated by the flange surface of the second lens, thereby ensuring the imaging quality of the optical imaging lens.

[0080] In some optional embodiments, the spacer assembly further includes a second spacer positioned between the second lens and the third lens. The center thickness CT2 of the second lens on the optical axis and the outer diameter D2s of the object-side surface of the second spacer satisfy the following relationship: 0.30 < CT2 / D2s < 0.85. By constraining CT2 / D2s within a reasonable range, the outer diameter range and center thickness of the second lens can be effectively limited, ensuring that the structure of the second lens meets molding requirements. This helps further improve the manufacturing accuracy of the second lens' surface profile, thereby reducing manufacturing tolerances for the second lens and ensuring the stability of the second lens' optical performance.

[0081] In some optional embodiments, the spacer element group further includes a second spacer element, which is located between the second lens and the third lens, and the outer diameter D2m of the image side surface of the second spacer element, the inner diameter d2m of the image side surface of the second spacer element, and the curvature radius R5 of the object side surface of the third lens satisfy the following: 0.78≤(D2m-d2m) / R5<3.60. By constraining (D2m-d2m) / R5 within a reasonable range, the flange surface width of the third lens is indirectly constrained, which is beneficial to improving the assembly stability of the optical elements in the middle section of the optical imaging lens. At the same time, the deflection angle of the light on the object side surface of the third lens is constrained, ensuring the transmission path of the light, reducing multiple reflections of the light at the flange position of the third lens, and thus reducing the energy of stray light. Among them, the optical elements include lenses, spacers and other structures.

[0082] In some optional embodiments, the spacer element group further includes a second spacer element and a third spacer element. The second spacer element is positioned between the second lens and the third lens, and the third spacer element is positioned between the third lens and the fourth lens and partially contacts the image-side surface of the third lens. The inner diameter d2m of the image-side surface of the second spacer element, the inner diameter d3s of the object-side surface of the third spacer element, and the combined focal length f23 of the second and third lenses satisfy the following relationship: -2.40 < (d2m - d3s) / f23 × 10 < -0.7. By constraining (d2m - d3s) / f23 × 10 within a reasonable range, stray light entering the third lens can be blocked by the second spacer element. At the same time, stray light generated by the edge of the effective diameter of the third lens is intercepted by the third spacer element. This controls the refraction and scattering of light at the second and third lenses, thereby improving imaging quality.

[0083] In some optional embodiments, the spacer element group further includes a fourth spacer element, which is positioned between the fourth lens and the fifth lens and partially contacts the object-side surface of the fourth lens. The inner diameter d4s of the object-side surface of the fourth spacer element, the radius of curvature R8 of the image-side surface of the fourth lens, and the refractive index N4 of the fourth lens satisfy the following relationship: 1.20 < d4s / R8 × N4 < 2.05. By limiting the refractive index of the fourth lens and the radius of curvature of the image-side surface of the fourth lens using the above expression, the curvature degree of the fourth lens and the processability of the fourth lens can be guaranteed while meeting optical requirements. Furthermore, limiting the inner diameter of the object-side surface of the fourth spacer element ensures that imaging light emitted by the fourth lens passes smoothly through the fourth spacer element, and that the fourth spacer element blocks stray light generated by the fourth lens, thereby improving the imaging quality of the optical imaging lens.

[0084] In another embodiment, the optical imaging lens includes a lens barrel and a lens group and a spacer element group disposed in the lens barrel, the lens group consisting of six lenses, the lens group including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis, the first lens having negative optical power, the object side surface of the first lens being convex, the image side surface of the first lens being concave, and the sixth lens having negative optical power; the spacer element group includes at least a first spacer element and a second spacer element, the first spacer element being located between the first lens and the second lens The first lens is located between the second lens and the third lens and is in contact with the image side surface of the first lens. The second spacer element is located between the second lens and the third lens. The inner diameter d1s of the object side surface of the first spacer element and the inner diameter d2m of the image side surface of the second spacer element satisfy the following relationship: 2.60<d1s / d2m≤3.55. The spacing distance EP12 between the first spacer element and the second spacer element on the optical axis, the center thickness CT2 of the second lens, and the combined focal length f12 of the first lens and the second lens satisfy the following relationship: 0.69≤(CT2+EP12) / |f12|<3.05.

[0085] The optical imaging lens of the present application includes a lens barrel, six lenses, and at least two spacer elements. When the inner diameter d1s of the object-side surface of the first spacer element and the inner diameter d2m of the image-side surface of the second spacer element satisfy the following relationship: 2.60<d1s / d2m≤3.55, the inner diameter d1s of the object-side surface of the first spacer element is larger than the inner diameter d2m of the image-side surface of the second spacer element. This makes it easy for light to be blocked by the second spacer element during transmission to the rear optical system, affecting the amount of light passing through. However, by constraining (CT2+EP12) / |f12| within a reasonable range, the present application can constrain the degree of light deflection when passing through the first and second lenses, as well as the optical path length when passing through the second lens. This ensures the convergence of light after passing through the first and second lenses, facilitating the entry of more light into the rear optical system, and ensuring the image brightness and image quality of the optical imaging lens.

[0086] Of course, this embodiment may also include other parameter formulas in the above embodiment, which will not be described one by one here.

[0087] Optionally, the optical imaging lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0088] It should be noted that each lens consists of an optically effective diameter region located at the center and an optically structured region located at the edge. The optically structured region is located outside the optically effective diameter region and is arranged circumferentially around the optically effective diameter region. The optically effective diameter region is used for the passage of imaging light, while the optically structured region is not used for the passage of imaging light. The optically structured region is used for contact with the lens barrel, adjacent lenses, or adjacent spacer elements. The optically structured region is also called the non-effective diameter region.

[0089] The optical imaging lens in this application may utilize multiple lenses, such as the six lenses described above. In this application, at least one of the lens surfaces is an aspheric surface. Aspheric lenses are characterized by a continuously varying curvature from the center to the periphery. Unlike spherical lenses, which have a constant curvature from the center to the periphery, aspheric lenses have a better curvature radius characteristic, with the advantages of improving distortion and astigmatism. The use of aspheric lenses can minimize aberrations that occur during imaging, thereby improving image quality.

[0090] 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 an optical imaging lens using six lenses as an example, the optical imaging lens is not limited to six lenses. If desired, the optical imaging lens may also include other numbers of lenses.

[0091] Figure 1 A schematic diagram of the dimensions of an optical imaging lens of the present application is shown. Figure 1 Parameters such as d1s, D1s, d2s, d2m, D2s, D2m, d3s, d4s, EP01, EP12, CP2, d0s, d0m, and L are labeled to provide a clear and intuitive understanding of their meaning. To facilitate the description of the optical imaging lens and specific lens surface shapes, these parameters will not be reflected in the drawings when describing specific embodiments.

[0092] The following further describes examples of specific surface shapes and parameters of the optical imaging lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0093] It should be noted that in the following Example 1, there are Examples 1-1, 1-2, and 1-3; in Example 2, there are Examples 2-1, 2-2, and 2-3; and in Example 3, there are Examples 3-1, 3-2, and 3-3. While the parameters such as the radius of curvature, center thickness, and spacing between lenses, as well as the high-order coefficients, of the optical imaging lenses of the three embodiments within the same embodiment are identical, the parameters such as the lens barrel, the thickness, inner diameter, and outer diameter of the first, second, and third spacers, as well as the shapes of some lenses, are different. In other words, the primary imaging structures are the same, while the auxiliary imaging structures are different.

[0094] It should be noted that any of the following embodiments 1 to 3 are applicable to all implementation methods of the present application.

[0095] Example 1

[0096] like Figures 2 to 8 As shown, the optical imaging lens of embodiment 1 is described. Figure 2 1-1 shows a schematic structural diagram of the optical imaging lens of Example 1-1. Figure 3 Schematic diagram of the structure of the optical imaging lens of Example 1-2 is shown. Figure 4 Schematic diagrams of the structures of the optical imaging lenses of Examples 1-3 are shown.

[0097] like Figures 2 to 4 As shown, the optical imaging lens includes a lens barrel P0, six lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, and a sixth lens E6, which are arranged in sequence from the object side to the image side.

[0098] like Figure 21-1. The optical imaging lens system of Example 1-1 is shown in FIG. In this embodiment, the optical imaging lens system further includes a second auxiliary spacer element P2b. The object-side surface S1 of the first lens element is spaced apart from the lens barrel. The object-side surface and image-side surface of the first spacer element partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively. The object-side surface and image-side surface of the second spacer element partially contact the image-side surface S4 of the second lens element and the object-side surface of the second auxiliary spacer element, respectively. The image-side surface of the second auxiliary spacer element partially contacts the object-side surface S5 of the third lens element. The object-side surface and image-side surface of the third spacer element partially contact the image-side surface S6 of the third lens element and the object-side surface S7 of the fourth lens element, respectively. The object-side surface and image-side surface of the fourth spacer element partially contact the image-side surface S8 of the fourth lens element and the object-side surface S9 of the fifth lens element, respectively. The image-side surface S10 of the fifth lens element partially contacts the lens barrel. The object-side surface of the fifth spacer element partially contacts the lens barrel. The image-side surface of the fifth spacer element partially contacts the object-side surface S11 of the sixth lens element. The image-side surface S12 of the sixth lens element is spaced apart from the lens barrel.

[0099] like Figure 3 Figure 2 is a schematic structural diagram of the optical imaging lens of Example 1-2. In this embodiment, the image-side surface S10 of the fifth lens element contacts the object-side surface of the fifth spacer element, the image-side surface of the fifth spacer element contacts the lens barrel portion, and the object-side surface S11 of the sixth lens element contacts the lens barrel portion. The optical imaging lens also includes a second auxiliary spacer element P2b. The abutment and supporting mechanism of the second auxiliary spacer element P2b and the other spacer elements is the same as that of Example 1-1. The relevant description of Example 1-1 can be referred to and will not be repeated here.

[0100] like Figure 4 , which is a schematic structural diagram of the optical imaging lens of Example 1-3. In this embodiment, the optical imaging lens further includes a fifth auxiliary spacer element P5b. The image-side surface of the second lens element partially contacts the lens barrel, the object-side surface of the second spacer element partially contacts the lens barrel, and the image-side surface of the second spacer element partially contacts the object-side surface S5 of the third lens element. The fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens element E6. The object-side surface of the fifth spacer element partially contacts the image-side surface S10 of the fifth lens element. The object-side and image-side surfaces of the fifth auxiliary spacer element partially contact the image-side surface S11 of the sixth lens element, respectively. The abutment and supporting methods of the other spacer elements are the same as those of Example 1-1. Reference may be made to the relevant description of Example 1-1 and will not be repeated here.

[0101] In summary, the structural parameters of the optical imaging lens of Example 1 in Example 1-1, Example 1-2, and Example 1-3 are shown in Table 8.

[0102] In Example 1, the first lens E1 has negative focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is convex. The third lens E3 has positive focal power, the object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The fourth lens E4 has negative focal power, the object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The sixth lens E6 has negative focal power, the object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is concave. In Table 1 below, OBJ (not shown) represents the object plane of the optical imaging lens, S13 (not shown) and S14 (not shown) may be the object-side and image-side surfaces of a filter or protective glass, respectively. S15 (not shown) represents the imaging plane of the optical imaging lens, and STO (not shown) represents the aperture stop, located between the second and third lens elements. Light rays originating from the object plane sequentially pass through S1 through S14 before arriving at S15 (the imaging plane).

[0103] Table 1 shows the basic structural parameters of the optical imaging lens of Example 1, wherein the units of curvature radius and thickness are both millimeters.

[0104] Table 1

[0105]

[0106] In Example 1, the object-side surface and the image-side surface of the first lens E1 to the sixth lens E6 are all aspherical surfaces. The surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0107] Formula (1)

[0108] Where x is the distance vector from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R, i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; and Ai is the correction coefficient for the i-th order of the aspheric surface. Table 3 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspheric mirror surface S1-S12 in Example 1.

[0109] Table 2

[0110]

[0111] Figure 5The axial chromatic aberration curve of the optical imaging lens of Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 6 The astigmatism curve of the optical imaging lens of Example 1 is shown, which represents the degree of meridional image curvature and sagittal image curvature. Figure 7 The distortion curve of the optical imaging lens of Example 1 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 8 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.

[0112] according to Figures 5 to 8 It can be seen that the optical imaging lens provided in Example 1 can achieve good imaging quality.

[0113] Example 2

[0114] like Figures 9 to 15 As shown, the optical imaging lens of the second embodiment is described. Figure 9 FIG2 shows a schematic structural diagram of the optical imaging lens of Example 2-1. Figure 10 FIG2 shows a schematic structural diagram of the optical imaging lens of Example 2-2. Figure 11 A schematic structural diagram of the optical imaging lens of Example 2-3 is shown.

[0115] like Figures 9 to 11 As shown, the optical imaging lens includes a lens barrel P0, six lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, and a sixth lens E6, which are arranged in sequence from the object side to the image side.

[0116] like Figure 9 2-1 is a schematic structural diagram of the optical imaging lens system of Example 2-1. In this embodiment, the object-side surface S1 of the first lens element is spaced apart from the lens barrel. The object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively. The object-side surface and image-side surface of the second spacer element partially contact the image-side surface S4 of the second lens element and the object-side surface S5 of the third lens element, respectively. The object-side surface and image-side surface of the third spacer element partially contact the image-side surface S6 of the third lens element and the object-side surface S7 of the fourth lens element, respectively. The object-side surface and image-side surface of the fourth spacer element partially contact the image-side surface S8 of the fourth lens element and the object-side surface S9 of the fifth lens element, respectively. The object-side surface of the fifth spacer element partially contacts the image-side surface S10 of the fifth lens element, and the image-side surface of the fifth spacer element partially contacts the lens barrel. The object-side surface S11 of the sixth lens element partially contacts the lens barrel, and the image-side surface S12 of the sixth lens element is spaced apart from the lens barrel.

[0117] like Figure 10 FIG2 is a schematic diagram of the structure of the optical imaging lens of Example 2-2. In this embodiment, the image-side surface S10 of the fifth lens element partially contacts the lens barrel, the object-side surface of the fifth spacer element partially contacts the lens barrel, and the image-side surface of the fifth spacer element partially contacts the object-side surface S11 of the sixth lens element. The abutment and supporting structure of the other spacer elements is the same as that of Example 2-1. Please refer to the relevant description of Example 2-1 and will not be repeated here.

[0118] like Figure 11 FIG2 is a schematic diagram of the structure of the optical imaging lens of Example 2-3. In this embodiment, the image-side surface S10 of the fifth lens element contacts the lens barrel, the object-side surface of the fifth spacer element contacts the lens barrel, and the image-side surface of the fifth spacer element contacts the object-side surface S11 of the sixth lens element. The abutment and supporting structure of the other spacer elements is the same as that of Example 2-1. Please refer to the relevant description of Example 2-1 and will not be repeated here.

[0119] In summary, the structural parameters of the optical imaging lens of Example 2 in Example 2-1, Example 2-2, and Example 2-3 are shown in Table 8.

[0120] In Example 2, the first lens E1 has negative focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is convex. The third lens E3 has positive focal power, the object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The fourth lens E4 has negative focal power, the object-side surface S7 of the fourth lens is concave, and the image-side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is convex. The sixth lens E6 has negative focal power, the object-side surface S11 of the sixth lens is concave, and the image-side surface S12 of the sixth lens is convex. In Table 3 below, OBJ (not shown) represents the object plane of the optical imaging lens, S13 (not shown) and S14 (not shown) may be the object-side and image-side surfaces of a filter or protective glass, respectively. S15 (not shown) represents the imaging plane of the optical imaging lens, and STO (not shown) represents the aperture stop, located between the second and third lens elements. Light rays originating from the object plane sequentially pass through S1 through S14 before arriving at S15 (the imaging plane).

[0121] Table 3 shows the basic structural parameters of the optical imaging lens of Example 2, where the units of curvature radius and thickness are both millimeters.

[0122] Table 3

[0123]

[0124] Table 4 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric mirror surfaces S1-S12 in Example 2. The surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0125] Table 4

[0126]

[0127] Figure 12 The axial chromatic aberration curve of the optical imaging lens of Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 13 The astigmatism curve of the optical imaging lens of Example 2 is shown, which represents the degree of meridional image curvature and sagittal image curvature. Figure 14 The distortion curve of the optical imaging lens of Example 2 is shown, which represents the distortion values corresponding to different field angles. Figure 15 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.

[0128] according to Figures 12 to 15 It can be seen that the optical imaging lens provided in the second embodiment can achieve good imaging quality.

[0129] Example 3

[0130] like Figures 16 to 22 As shown, the optical imaging lens of Example 3 is described. Figure 16 FIG3 shows a schematic structural diagram of the optical imaging lens of Example 3-1. Figure 17 FIG3 shows a schematic structural diagram of the optical imaging lens of Example 3-2. Figure 18 A schematic structural diagram of the optical imaging lens of Example 3-3 is shown.

[0131] like Figures 16 to 18 As shown, the optical imaging lens includes a lens barrel P0, six lenses and multiple spacer elements. The lens barrel includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, and a sixth lens E6, which are arranged in sequence from the object side to the image side.

[0132] like Figure 162 is a schematic structural diagram of an optical imaging lens according to Example 3-1. In this embodiment, the optical imaging lens further includes a third auxiliary spacer element P3b, which is positioned between the third spacer element P3 and the fourth lens element E4. The object-side surface S1 of the first lens element is spaced apart from the lens barrel. The object-side surface and image-side surface of the first spacer element partially contact the image-side surface S2 of the first lens element and the object-side surface S3 of the second lens element, respectively. The object-side surface and image-side surface of the second spacer element partially contact the image-side surface S4 of the second lens element and the object-side surface S5 of the third lens element, respectively. The object side surface and image side surface of the third spacer element are in partial contact with the image side surface S6 of the third lens and the object side surface of the third auxiliary spacer element respectively, the image side surface of the third auxiliary spacer element is partially in contact with the object side surface S7 of the fourth lens, the object side surface and image side surface of the fourth spacer element are partially in contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively, the image side surface S10 of the fifth lens is in partial contact with the lens barrel, the object side surface of the fifth spacer element is in partial contact with the lens barrel, the image side surface of the fifth spacer element is in partial contact with the object side surface S11 of the sixth lens, and the image side surface S12 of the sixth lens is spaced apart from the lens barrel.

[0133] like Figure 17 FIG3 is a schematic structural diagram of the optical imaging lens of Example 3-2. In this embodiment, the object-side and image-side surfaces of the third spacer element partially contact the image-side surface S6 of the third lens element and the object-side surface S7 of the fourth lens element, respectively. The image-side surface S10 of the fifth lens element partially contacts the object-side surface of the fifth spacer element. The image-side surface of the fifth spacer element partially contacts the lens barrel, and the object-side surface S11 of the sixth lens element partially contacts the lens barrel. The abutment and supporting structure of each spacer element is the same as that of Example 3-1. Please refer to the relevant description of Example 3-1 and will not be repeated here.

[0134] like Figure 18 FIG2 is a schematic structural diagram of an optical imaging lens according to Example 3-3. In this embodiment, the optical imaging lens further includes a third auxiliary spacer element P3b, which is located between the third spacer element P3 and the fourth lens element E4. The abutment and support mechanism of each spacer element is the same as that of Example 3-1. For details, please refer to the relevant description of Example 3-1 and will not be repeated here.

[0135] In summary, the structural parameters of the optical imaging lens of Example 3 in Example 3-1, Example 3-2, and Example 3-3 are shown in Table 8.

[0136] In Example 3, the first lens E1 has negative focal power, the object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The second lens E2 has negative focal power, the object-side surface S3 of the second lens is convex, and the image-side surface S4 of the second lens is concave. The third lens E3 has positive focal power, the object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The fourth lens E4 has negative focal power, the object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object-side surface S9 of the fifth lens is concave, and the image-side surface S10 of the fifth lens is convex. The sixth lens E6 has negative focal power, the object-side surface S11 of the sixth lens is convex, and the image-side surface S12 of the sixth lens is concave. In Table 5 below, OBJ (not shown) represents the object plane of the optical imaging lens, S13 (not shown) and S14 (not shown) may be the object-side and image-side surfaces of a filter or protective glass, respectively. S15 (not shown) represents the imaging plane of the optical imaging lens, and STO (not shown) represents the aperture stop, located between the second and third lens elements. Light rays originating from the object plane sequentially pass through S1 through S14 before arriving at S15 (the imaging plane).

[0137] Table 5 shows the basic structural parameters of the optical imaging lens of Example 3, where the units of curvature radius and thickness are both millimeters.

[0138] Table 5

[0139]

[0140] Table 6 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric mirror surfaces S1-S12 in Example 3. The surface shape of each aspheric surface can be defined by formula (1) given in Example 1 above.

[0141] Table 6

[0142]

[0143] Figure 19 The axial chromatic aberration curve of the optical imaging lens of Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical imaging lens. Figure 20 The astigmatism curve of the optical imaging lens of Example 3 is shown, which represents the degree of meridional image curvature and sagittal image curvature. Figure 21 The distortion curve of the optical imaging lens of Example 3 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 22 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.

[0144] according to Figures 19 to 22 It can be seen that the optical imaging lens provided in Example 3 can achieve good imaging quality.

[0145] In summary, the optical imaging lenses of Examples 1 to 3 respectively satisfy the relationships shown in Table 7.

[0146] Table 7

[0147]

[0148] Table 8 shows some parameters of the optical imaging lenses of Examples 1 to 3 (unit: mm).

[0149] Table 8

[0150]

[0151] 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 a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0152] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0153] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0154] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0155] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical imaging lens, characterized in that: The lens barrel comprises a lens group and a spacer element group arranged in the lens barrel. The lens group is composed of six lenses, and the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis, the first lens having negative focal power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave, the third lens having positive focal power, the object side surface of the third lens being convex, and the image side surface of the third lens being convex, the fourth lens having negative focal power, and the image side surface of the fourth lens being concave, the fifth lens having positive focal power, and the image side surface of the fifth lens being convex, and the sixth lens having negative focal power; The spacer element group includes at least a first spacer element, the first spacer element is located between the first lens and the second lens and is in contact with the image-side surface of the first lens; The effective focal length f of the optical imaging lens and half of the maximum field of view HFOV of the optical imaging lens satisfy the following conditions: 9.14 mm ≤ f × tan (HFOV) < 13.05 mm; The inner diameter d1s of the object-side surface of the first spacer element, the curvature radius R1 of the object-side surface of the first lens, and the Abbe number V1 of the first lens satisfy the following relationship: 13.65≤d1s / R1×V1≤15.

25.

2. The optical imaging lens according to claim 1, wherein: The inner diameter d0s of the object-side end surface of the lens barrel, the inner diameter d1s of the object-side surface of the first spacer element, and the effective focal length f1 of the first lens satisfy the following: -2.40≤(d0s-d1s) / f1<-1.

25.

3. The optical imaging lens according to claim 1, wherein: The effective focal length f1 of the first lens, the spacing distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacing element on the optical axis satisfy the following: -2.70≤f1 / EP01<-1.

80.

4. The optical imaging lens according to claim 1, wherein: The spacing distance EP01 between the object side end face of the lens barrel and the object side face of the first spacer element on the optical axis, the center thickness CT1 of the first lens on the optical axis, the air spacing T12 between the first lens and the second lens on the optical axis, and the refractive index N1 of the first lens satisfy the following: 1.95<(CT1+T12) / EP01×N1≤2.

71.

5. The optical imaging lens according to claim 1, wherein: The outer diameter D1s of the object-side surface of the first spacer element, the inner diameter d1s of the object-side surface of the first spacer element, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following relationship: 4.60<(D1s-d1s) / T12≤6.

55.

6. The optical imaging lens according to claim 1, wherein: A distance L from the object-side end surface of the lens barrel to the image-side end surface of the lens barrel, a center thickness CT2 of the second lens on the optical axis, and a refractive index N2 of the second lens satisfy the following: 5.19≤L / CT2×N2≤5.

90.

7. The optical imaging lens according to claim 1, wherein: A distance L from the object side end face of the lens barrel to the image side end face of the lens barrel, and a center distance Tr5r10 between the object side face of the third lens and the image side face of the fifth lens on the optical axis satisfy the following: 5.25<L / Tr5r10<9.

10.

8. The optical imaging lens according to claim 1, wherein: The inner diameter d0m of the image-side end surface of the lens barrel and the curvature radius R12 of the image-side surface of the sixth lens satisfy the following relationship: 0.70<d0m / |R12|≤2.

66.

9. The optical imaging lens according to claim 1, wherein: A distance L between the object-side end surface of the lens barrel and the image-side end surface of the lens barrel and an air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy 3.78≤L / T56≤7.

11.

10. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The distance EP01 between the object-side end face of the lens barrel and the object-side face of the first spacer element on the optical axis, and the distance EP12 between the first spacer element and the second spacer element on the optical axis satisfy the following: 1.50<EP12 / EP01<2.

33.

11. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The spacing distance EP12 between the first spacer element and the second spacer element on the optical axis and the combined focal length f12 of the first lens and the second lens satisfy the following: 0.25<EP12 / |f12|≤1.

56.

12. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The outer diameter D1s of the object side surface of the first spacer element, the outer diameter D2s of the object side surface of the second spacer element, and the spacing distance EP12 between the first spacer element and the second spacer element on the optical axis satisfy the following: 0.04≤(D1s-D2s) / EP12<1.

50.

13. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The inner diameter d2s of the object side of the second spacer element, the center thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy the following: 0.35≤d2s / (CT2+CP2)<0.

85.

14. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The center thickness CT2 of the second lens on the optical axis and the outer diameter D2s of the object side of the second spacer element satisfy the following: 0.30<CT2 / D2s<0.

85.

15. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. The outer diameter D2m of the image side surface of the second spacer element, the inner diameter d2m of the image side surface of the second spacer element, and the curvature radius R5 of the object side surface of the third lens satisfy the following: 0.78≤(D2m-d2m) / R5<3.

60.

16. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a second spacer element and a third spacer element. The second spacer element is located between the second lens and the third lens. The third spacer element is located between the third lens and the fourth lens and is in contact with the image side surface of the third lens. The inner diameter d2m of the image side surface of the second spacer element, the inner diameter d3s of the object side surface of the third spacer element, and the combined focal length f23 of the second lens and the third lens satisfy: -2.40<(d2m-d3s) / f23×10<-0.

7.

17. The optical imaging lens according to any one of claims 1 to 9, wherein: The spacer element group also includes a fourth spacer element, which is located between the fourth lens and the fifth lens and partially contacts the object side surface of the fourth lens. The inner diameter d4s of the object side surface of the fourth spacer element, the curvature radius R8 of the image side surface of the fourth lens, and the refractive index N4 of the fourth lens satisfy the following relationship: 1.20<d4s / R8×N4<2.05.

Images