Optical imaging lens

Abstract

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel and a lens group and a spacing element group which are arranged in the lens barrel, the lens group comprises a first lens to a sixth lens, the spacing element group at least comprises a first spacing element, and the first spacing element is located between the first lens and a second lens and makes contact with the image side face part of the first lens; the effective focal length f of the optical imaging lens and the half HFOV of the maximum field angle of the optical imaging lens meet the condition that f * tan (HFOV) is greater than or equal to 9.14 mm and less than 13.05 mm; the inner diameter d1s of the object side surface of the first spacing 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 condition: 13.65 < = d1s / R1 * V1 < = 15.25. The problem that in the prior art, stray light is serious in order to meet the requirement of a large view field through an optical imaging lens is solved.

Description

Technical Field

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

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

[0003] However, the object-side aperture diameter of the optical imaging lens with a large field of view is large, and there is a lot of light entering the optical imaging lens from different angles. Part of the large-angle light is refracted by the first lens and then shoots towards the inner diameter of the first spacer element, and is reflected by the inner diameter of the first spacer element to form stray light. There is also part of the light that bifurcates at the edge position of the optical effective diameter of the first lens to form stray light. This part of the stray light has a great impact on the picture, such as causing picture distortion and local image blurring.

[0004] That is to say, in the prior art, there is a problem that the stray light is serious in the optical imaging lens in order to meet the demand of a large field of view. Summary of the Invention

[0005] The main object of the present invention is to provide an optical imaging lens to solve the problem that the stray light is serious in the optical imaging lens in the prior art in order to meet the demand 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, including a lens barrel and a lens group and a spacer element group disposed 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 has a negative optical 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 a positive optical 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 a negative optical power, the image side surface of the fourth lens is concave. The fifth lens has a positive optical power, the image side surface of the fifth lens is convex. The sixth lens has a negative optical power; the spacer element group includes at least a first spacer element, and the first spacer element is located between the first lens and the second lens and is in partial 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 angle HFOV of the optical imaging lens satisfy: 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: 13.65 ≤ d1s / R1×V1 ≤ 15.25.

[0007] According to another aspect of the present invention, there is provided an optical imaging lens, comprising a lens barrel and a lens group and a spacer element group disposed within 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 has a negative optical power, the object side surface of the first lens is convex, the image side surface of the first lens is concave, and the sixth lens has a negative optical power; the spacer element group includes at least a first spacer element and a second spacer element. The first spacer element is located between the first lens and the second lens and is in partial 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: 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 central thickness CT2 of the second lens, and the combined focal length f12 of the first lens and the second lens satisfy: 0.69 ≤ (CT2 + EP12) / |f12| < 3.05.

[0008] Further, 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: -2.40 ≤ (d0s - d1s) / f1 < -1.25.

[0009] Further, 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 spacer element on the optical axis satisfy: -2.70 ≤ f1 / EP01 < -1.80.

[0010] Further, the spacing 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, the central thickness CT1 of the first lens on the optical axis, the air gap T12 between the first lens and the second lens on the optical axis, and the refractive index N1 of the first lens satisfy: 1.95 < (CT1 + T12) / EP01 × N1 ≤ 2.71.

[0011] Further, 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: 4.60 < (D1s - d1s) / T12 ≤ 6.55.

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

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

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

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

[0016] Further, the spacer element group further includes a second spacer element located between the second lens and the third lens. The spacer distance EP01 on the optical axis between the object-side end face of the lens barrel and the object-side surface of the first spacer element and the spacer distance EP12 on the optical axis between the first spacer element and the second spacer element satisfy: 1.50 < EP12 / EP01 < 2.33.

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

[0018] Further, the spacer element group further includes a second spacer element 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 spacer distance EP12 on the optical axis between the first spacer element and the second spacer element satisfy: 0.04 ≤ (D1s - D2s) / EP12 < 1.50.

[0019] Further, the spacer element group further includes a second spacer element located between the second lens and the third lens. The inner diameter d2s of the object-side surface of the second spacer element, the central thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy: 0.35 ≤ d2s / (CT2 + CP2) < 0.85.

[0020] Further, the spacer element group further includes a second spacer element located between the second lens and the third lens. The central thickness CT2 of the second lens on the optical axis and the outer diameter D2s of the object-side surface of the second spacer element satisfy: 0.30 < CT2 / D2s < 0.85.

[0021] Further, the spacer element group further includes a second spacer element located between the second lens and the third lens. The following relationship is satisfied among 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: 0.78 ≤ (D2m - d2m) / R5 < 3.60.

[0022] Further, the spacer element group further includes a second spacer element and a third spacer element. The second spacer element is located between the second lens and the third lens, and the third spacer element is located between the third lens and the fourth lens and is in partial contact with the image side surface of the third lens. The following relationship is satisfied among 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: -2.40 < (d2m - d3s) / f23 × 10 < -0.7.

[0023] Further, the spacer element group further includes a fourth spacer element located between the fourth lens and the fifth lens and in partial contact with the object side surface of the fourth lens. The following relationship is satisfied among 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: 1.20 < d4s / R8 × N4 < 2.05.

[0024] Applying the technical solution of the present invention, the optical imaging lens includes a lens barrel, a lens group, and a spacer element group disposed in the lens barrel. The lens group is composed of six lenses and 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 a negative optical power, the object side surface of the first lens is convex, the image side surface of the first lens is concave, the third lens has a positive optical power, the object side surface of the third lens is convex, the image side surface of the third lens is convex, the fourth lens has a negative optical power, the image side surface of the fourth lens is concave, the fifth lens has a positive optical power, the image side surface of the fifth lens is convex, and the sixth lens has a negative optical power. The spacer element group at least includes a first spacer element located between the first lens and the second lens and in partial contact with the image side surface of the first lens. The following relationship is satisfied between the effective focal length f of the optical imaging lens and half of the maximum field of view angle HFOV of the optical imaging lens: 9.14 mm ≤ f × tan(HFOV) < 13.05 mm. The following relationship is satisfied among 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: 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 angle HFOV of the optical imaging lens satisfy: 9.14 mm ≤ f × tan(HFOV) < 13.05 mm, the field of view angle of the optical imaging lens is an ultra-wide-angle lens within 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 reduces the generation of stray light while meeting the ultra-wide-angle requirements, the present application confines 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 light transmission path, reducing the light deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light. At the same time, it ensures that the light converges and the scattering is reduced, 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 forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 The dimension marking diagram of the optical imaging lens of an alternative embodiment of the present invention is shown;

[0028] Figure 2 The schematic structural diagram of the optical imaging lens of Embodiment 1-1 of the present invention is shown;

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

[0030] Figure 4 The schematic structural diagram of the optical imaging lens of Embodiment 1-3 of the present invention is shown;

[0031] Figures 5 to 8 The axial chromatic aberration curve, astigmatism curve, distortion curve and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1 of the present invention are respectively shown;

[0032] Figure 9 The schematic structural diagram of the optical imaging lens of Embodiment 2-1 of the present invention is shown;

[0033] Figure 10 The schematic structural diagram of the optical imaging lens of Embodiment 2-2 of the present invention is shown;

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

[0035] Figures 12 to 15 respectively show the 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;

[0036] Figure 16 show a schematic structural diagram of the optical imaging lens according to Embodiment 2-1 of the present invention;

[0037] Figure 17 show a schematic structural diagram of the optical imaging lens according to Embodiment 2-2 of the present invention;

[0038] Figure 18 show a schematic structural diagram of the optical imaging lens according to Embodiment 2-3 of the present invention;

[0039] Figures 19 to 22 respectively show the 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;

[0040] Figure 23 show an optical path diagram of the optical imaging lens according to an alternative embodiment of the present invention;

[0041] Figure 24 show Figure 23 the stray light spot diagram of the optical imaging lens in

[0042] Figure 25 show an optical path diagram of the optical imaging lens according to another alternative embodiment of the present invention;

[0043] Figure 26 show Figure 25 the stray light spot diagram of the optical imaging lens in

[0044] Figure 27 show an optical path diagram of an exemplary optical imaging lens;

[0045] Figure 28 show Figure 27 the stray light spot diagram of the optical imaging lens in

[0046] Figure 29 show an optical path diagram of another exemplary optical imaging lens;

[0047] Figure 30 show Figure 29 the stray light spot diagram of the optical imaging lens in

[0048] Among them, the above-mentioned drawings include the following reference numerals:

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

[0050] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

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

[0052] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for ease of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms do not limit the present invention.

[0053] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below can also be referred to as the second lens or the third lens.

[0054] In the drawings, for ease of illustration, the thickness, size and shape of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0055] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive or negative value of the R value (R refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). Taking the object side surface as an example, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; taking the image side surface as an example, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface. 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 that in the prior art, the optical imaging lens has serious stray light in order to meet the requirements of a large field of view, the present invention provides an optical imaging lens.

[0057] As Figures 1 to 22 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 is composed of six lenses. 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 a negative optical 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 a positive optical 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 a negative optical power. The image side surface of the fourth lens is concave. The fifth lens has a positive optical power. The image side surface of the fifth lens is convex. The sixth lens has a negative optical 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 partial 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 angle HFOV of the optical imaging lens satisfy: 9.14 mm ≤ f × tan(HFOV) < 13.05 mm; the inner diameter d1s of the object side surface of the first spacer element, the radius of curvature R1 of the object side surface of the first lens, and the Abbe number V1 of the first lens satisfy: 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 angle HFOV of the optical imaging lens satisfy: 9.14 mm ≤ f × tan(HFOV) < 13.05 mm, the field of view angle of the optical imaging lens is an ultra-wide-angle lens within the range of 152° to 160°. In the design of ultra-wide-angle lenses, stray light is a common problem. To ensure that the optical imaging lens reduces the generation of stray light while meeting the ultra-wide-angle requirements, the present application confines d1s / R1 × V1 within a reasonable range. By controlling the curvature radius of the object side surface 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 light transmission path, reduce the light deflected to the inner diameter of the first spacer element, thereby reducing the generation of stray light. At the same time, it ensures that the 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. At the same time, by setting the above conditional formula d1s / R1 × V1 to satisfy different numerical ranges respectively, four optical imaging lens solutions are provided as follows.

[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 within 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 Figure 23 and Figure 24 shown. The light emitted from the first lens passes through the first spacer element smoothly, does not bifurcate at the edge position of the effective diameter, and is not deflected to the inner diameter of the first spacer element, reducing the generation of stray light, reducing the 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 within 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 Figure 25 and Figure 26 shown. The light emitted from the first lens passes through the first spacer element smoothly, does not bifurcate at the edge position of the effective diameter, and is not deflected to the inner diameter of the first spacer element, reducing the generation of stray light, reducing the stray light spots, and achieving clear imaging.

[0062] In the optical imaging lens of the third solution, d1s / R1×V1 = 12. In the optical imaging lens of the third solution, 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 Figure 27 and Figure 28 shown. The imaging light is deflected to the inner diameter of the first spacer element, and the light is reflected at the inner diameter position of the first spacer element to form stray light, generating a stray light spot with relatively high energy.

[0063] In the optical imaging lens of the fourth solution, d1s / R1×V1 = 16. In the optical imaging lens of the fourth solution, 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 Figure 29 and Figure 30 shown. The imaging light bifurcates at the edge position of the effective diameter to form stray light, generating a stray light spot with relatively high energy.

[0064] It can be seen from the optical imaging lenses of the above four solutions 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. When d1s / R1×V1 is less than 13.65 or greater than 15.26, serious stray light will be caused.

[0065] In Figure 24 , Figure 26 , Figure 28 and Figure 30 's stray light spot diagrams, the display box for the energy level in the X-axis direction of the crosshair cursor is below the X-axis. And the display box for the energy level in the Y-axis direction of the crosshair cursor is on the right side of the Y-axis. In the stray light spot diagram, the stray light with high energy is displayed.

[0066] It should be noted that in this application, by restricting d1s / R1×V1 within a reasonable range, the deflection effect of the first lens on light can be controlled to solve the problem of stray light in the ultra-wide-angle lens. When d1s / R1×V1 satisfies 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 optimizations of the optical imaging lens on this basis. The optical power of each of the other lenses can be positive or negative according to the design requirements of the actual 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 satisfies: 9.14mm ≤ f×tan(HFOV) < 13.05mm; 13.65 ≤ d1s / R1×V1 ≤ 15.25, the optical imaging lens can meet the large field of view angle while reducing stray light.

[0067] For example, in some alternative embodiments, the first lens has a negative optical power, which can appropriately diverge the light rays entering the first lens, so that the optical imaging lens has a large field of view angle. For another example, in some alternative embodiments, the third lens has a positive optical power, which can appropriately converge the light rays, enabling the light rays to smoothly transition to the rear, while balancing the aberration brought by the front negative lens and improving the imaging quality. For another example, in some alternative embodiments, the fourth lens has a negative optical power, which can further diverge the light rays, enabling the light rays to smoothly transition to the rear. For another example, in some alternative embodiments, the fifth lens has a positive optical power, which can balance the aberration brought by the front negative lens and contribute to improving the imaging quality. For another example, in some alternative embodiments, the sixth lens has a negative optical power, which can appropriately diverge the light rays to ensure the field of view angle of the optical imaging lens. For another example, in some alternative 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 alternative embodiments, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. For another example, in some alternative embodiments, the image side surface of the fourth lens is concave, and the image side surface of the fifth lens is convex. By reasonably constraining the surface types of each lens, it is beneficial to reasonably constrain the light ray trend, ensure the smooth transition of light rays, and is beneficial to correcting aberration.

[0068] In some alternative embodiments, 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: -2.40 ≤ (d0s - d1s) / f1 < -1.25. By constraining the relationship among 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, it is possible to ensure that the light rays are transmitted along a preset path, while ensuring the light input amount of the optical imaging lens, ensuring the relative illumination of the optical imaging lens, and at the same time controlling the flange width of the first lens to ensure the stability of the assembly.

[0069] In some alternative embodiments, the effective focal length f1 of the first lens, and the interval distance EP01 on the optical axis between the object side end surface of the lens barrel and the object side surface of the first spacer element satisfy: -2.70 ≤ f1 / EP01 < -1.80. By constraining f1 / EP01 within a reasonable range, it is possible to constrain the edge thickness of the first lens and the potting space, ensure that the first lens can accommodate sufficient glue amount at the edge position, thereby ensuring the assembly stability of the first lens, ensuring that the optical imaging lens meets the requirements of the push-off force, and at the same time enabling the change in optical performance of the optical imaging lens before and after the high-temperature and high-humidity type reliability test to meet the requirements, improving the reliability of the optical imaging lens, and at the same time constraining the effective focal length of the first lens to ensure the deflection angle of the light rays in the edge field of view of the first lens and reducing the sensitivity of the optical performance.

[0070] In some alternative embodiments, the following relationships are satisfied among the spacing distance EP01 on the optical axis between the object-side end face of the lens barrel and the object-side face of the first spacer element, the central 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: 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 to improve the processing feasibility of the first lens. At the same time, the relative position of the first lens can be ensured to improve the assembly stability. By constraining the material of the first lens and the optical path of light transmitted through the first lens, the spot energy of the optical ghost image generated at the effective diameter position of the first lens can be effectively reduced, ensuring the imaging effect of the optical imaging lens.

[0071] In some alternative embodiments, the following relationship is satisfied among the outer diameter D1s of the object-side face of the first spacer element, the inner diameter d1s of the object-side face of the first spacer element, and the air spacing T12 between the first lens and the second lens on the optical axis: 4.60 < (D1s - d1s) / T12 ≤ 6.55. By constraining (D1s - d1s) / T12 within a reasonable range, it can be ensured that the stray light generated at the flange position of the image-side face of the first lens is intercepted by the first spacer element. At the same time, it can prevent the situation where the spacing between the first lens and the second lens is too large, resulting in the first lens floating up after baking, effectively ensuring the stability of the first lens assembly, and thus improving the imaging quality of the optical imaging lens.

[0072] In some alternative embodiments, the following relationship is satisfied among the distance L from the object-side end face of the lens barrel to the image-side end face of the lens barrel, the central thickness CT2 of the second lens on the optical axis, and the refractive index N2 of the second lens: 5.19 ≤ L / CT2 × N2 ≤ 5.90. By constraining L / CT2 × N2 within a reasonable range, the proportion of the central thickness of the second lens in the length of the lens barrel can be constrained, which is beneficial to distinguishing the outer contour differences of the entire lens barrel structure, effectively controlling the cooperation between the optical imaging lens and the module, reasonably arranging the positions of the spacer elements, facilitating the miniaturization of the overall optical imaging lens. At the same time, suitable materials can ensure that the central thickness and surface shape change of the second lens are reduced before and after the reliability test under high temperature and high humidity conditions, which is beneficial to ensuring the stability of the optical performance.

[0073] In some alternative embodiments, the distance L from the object-side end face of the lens barrel to the image-side end face of the lens barrel and the central distance Tr5r10 on the optical axis between the object-side surface of the third lens and the image-side surface of the fifth lens satisfy: 5.25 < L / Tr5r10 < 9.10. By constraining L / Tr5r10 within a reasonable range, the distance from the object-side surface of the third lens to the image-side surface of the fifth lens can be constrained, ensuring the reasonable arrangement of each optical element in the middle section of the optical imaging lens. While ensuring the improvement of the resolution of the optical imaging lens, miniaturization is achieved, enabling the optical imaging lens to take into account both high image quality and miniaturization.

[0074] In some alternative embodiments, the inner diameter d0m of the image-side end face of the lens barrel and the radius of curvature R12 of the image-side surface of the sixth lens satisfy: 0.70 < d0m / |R12| ≤ 2.66. By constraining d0m / |R12| within a reasonable range, the deflection angle of the light rays on the image-side surface of the sixth lens can be controlled, reducing the light rays incident on the inner wall surface of the lens barrel, so that the imaging light rays can smoothly pass through the image-side end face of the lens barrel and shoot towards the imaging surface, reducing the generation of stray light. At the same time, the inner diameter of the image-side end face of the lens barrel is constrained to ensure that the stray light generated at the inclined surface position near the image side of the inner wall of the lens barrel cannot reach the imaging surface, ensuring the imaging quality of the optical imaging lens and further improving the clarity of the imaging of the optical imaging lens.

[0075] In some alternative embodiments, the distance L from the object-side end face of the lens barrel to the image-side end face of the lens barrel and the air gap T56 on the optical axis between the fifth lens and the sixth lens satisfy 3.78 ≤ L / T56 ≤ 7.11. By constraining L / T56 within a reasonable range, the degree of floating of the sixth lens after baking can be restricted, which is beneficial to ensuring the stability of the optical imaging lens. At the same time, the sensitivity problem caused by the unreasonable air gap between the two lenses can be reduced, and the sensitivity of the lens to high-temperature and high-humidity gases can be reduced, ensuring the stability of the field curvature performance of the optical imaging lens after baking and standing still.

[0076] In some alternative embodiments, the spacer element group further includes a second spacer element located between the second lens and the third lens. The spacer distance EP01 on the optical axis between the object-side end face of the lens barrel and the object-side surface of the first spacer element and the spacer distance EP12 on the optical axis between the first spacer element and the second spacer element satisfy: 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 lens and the second lens are relatively close, preventing the problem of large stress concentration during assembly. At the same time, the relative positions of the first lens and the second lens can be controlled while ensuring the size of the lens barrel, improving the stability of the assembly.

[0077] In some alternative embodiments, the spacer element group further includes a second spacer element 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. By restricting EP12 / |f12| within a reasonable range, the converging effect of light passing through the first lens and the second lens at the aperture is ensured, stray light is reduced, the imaging quality of the optical imaging lens is improved, and at the same time, more light is facilitated to enter the rear optical system, ensuring the imaging brightness of the optical imaging lens and further enhancing the comfort of the image.

[0078] In some alternative embodiments, the spacer element group further includes a second spacer element 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: 0.04 ≤ (D1s - D2s) / EP12 < 1.50. By restricting (D1s - D2s) / EP12 within a reasonable range, it can be ensured that the outer diameters of the first lens and the second lens are similar, and at the same time, the edge thickness of the second lens is ensured to guarantee the structural strength of the second lens. When the optical imaging lens is being assembled and subjected to axial stress, it is beneficial to reduce the maximum stress borne by the second lens, thereby reducing the risk of deformation of the second lens, improving the assembly stability, and ensuring the imaging quality.

[0079] In some alternative embodiments, the spacer element group further includes a second spacer element located between the second lens and the third lens. The inner diameter d2s of the object side surface of the second spacer element, the central thickness CT2 of the second lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy: 0.35 ≤ d2s / (CT2 + CP2) < 0.85. By restricting d2s / (CT2 + CP2) within a reasonable range, the influence of the central thickness of the second lens and the manufacturing tolerance of the flatness of the flange surface on the optical back focus of the optical imaging lens can be reduced, effectively avoiding the situation where the optical back focus exceeds the tolerance due to large lens tolerances during assembly. At the same time, it helps to intercept the edge stray light generated by the position of the flange surface of the second lens, ensuring the imaging quality of the optical imaging lens.

[0080] In some alternative embodiments, the spacer element group further includes a second spacer element 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 surface of the second spacer element satisfy: 0.30 < CT2 / D2s < 0.85. By restricting CT2 / D2s within a reasonable range, the outer diameter range of the second lens and the center thickness of the second lens can be effectively limited, ensuring that the structure of the second lens meets the molding requirements, contributing to further improvement of the manufacturing accuracy of the surface shape of the second lens, thereby reducing the manufacturing tolerance of the second lens and ensuring the stability of the optical performance of the second lens.

[0081] In some alternative embodiments, the spacer element group further includes a second spacer element located between the second lens and the third lens. The outer diameter D2m of the image side surface, the inner diameter d2m of the image side surface, and the curvature radius R5 of the object side surface of the third lens of the second spacer element satisfy: 0.78 ≤ (D2m - d2m) / R5 < 3.60. By restricting (D2m - d2m) / R5 within a reasonable range, the flange width of the third lens is indirectly restricted, 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 rays on the object side surface of the third lens is restricted, ensuring the transmission path of the light rays and reducing the multiple reflections of the light rays at the flange position of the third lens, thereby weakening the energy of the stray light. Among them, the optical elements include structures such as lenses and spacer elements.

[0082] In some alternative embodiments, the spacer element group further includes a second spacer element and a third spacer element. The second spacer element is located between the second lens and the third lens, and the third spacer element is located between the third lens and the fourth lens and is in partial 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. By restricting (d2m - d3s) / f23 × 10 within a reasonable range, the stray light entering the third lens can be blocked by the second spacer element, and at the same time, the stray light generated at the edge position of the effective diameter of the third lens can be intercepted by the third spacer element, controlling the refraction and scattering of the light rays at the second lens and the third lens, which is beneficial to improving the imaging quality.

[0083] In some alternative embodiments, the spacer element group further includes a fourth spacer element, which is located between the fourth lens and the fifth lens and is in partial contact with the object side surface of the fourth lens. The following relationship is satisfied among 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: 1.20 < d4s / R8 × N4 < 2.05. By restricting the refractive index of the fourth lens and the curvature radius of the image side surface of the fourth lens through the above expression, it is possible to ensure the bending degree of the fourth lens, ensure the processability of the fourth lens while meeting the optical requirements, and at the same time restrict the inner diameter of the object side surface of the fourth spacer element to ensure that the imaging light rays emerging from the fourth lens can smoothly pass through the fourth spacer element, and at the same time ensure that the fourth spacer element blocks the stray light generated by the fourth lens, which is beneficial to 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 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 has a negative optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The sixth lens has a negative optical power. The spacer element group includes at least a first spacer element and a second spacer element. The first spacer element is located between the first lens and the second lens and is in partial 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 following relationship is satisfied between 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: 2.60 < d1s / d2m ≤ 3.55. The following relationship is satisfied among the spacing distance EP12 between the first spacer element and the second spacer element on the optical axis, the central thickness CT2 of the second lens, and the combined focal length f12 of the first lens and the second lens: 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 2.60 < d1s / d2m ≤ 3.55 is satisfied between 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, 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. During the transmission of light to the rear system, the light is easily blocked by the second spacer element, affecting the light transmittance. However, in the present application, by restricting (CT2 + EP12) / |f12| within a reasonable range, it is possible to restrict the deflection degree of the light when passing through the first lens and the second lens and the optical path when passing through the second lens, ensuring the converging effect of the light after passing through the first lens and the second lens, facilitating more light to enter the rear optical system, ensuring the imaging brightness of the optical imaging lens, and ensuring the imaging quality of the optical imaging lens.

[0086] Of course, other parameters in the above embodiments may also be included in this embodiment, which will not be elaborated one by one here.

[0087] Optionally, the above 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 is composed of an optical effective diameter region located at the center and an optical structure region located at the edge. The optical structure region is located on the outer peripheral side of the optical effective diameter region and is arranged circumferentially around the optical effective diameter region. The optical effective diameter region is used for the passage of imaging light, while the optical structure region is not used for the passage of imaging light. The optical structure region is used to abut against the lens barrel or adjacent lenses or adjacent spacer elements. The optical structure region is also called the non-effective diameter region.

[0089] The optical imaging lens in the present application may employ multiple lenses, such as the six lenses described above. In the present application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate as much aberration as possible during imaging, thereby improving the imaging quality.

[0090] However, those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may further include other numbers of lenses.

[0091] Figure 1 Fig. shows a schematic diagram of the dimension marking of an optical imaging lens of the present application. Figure 1 Parameters such as d1s, D1s, d2s, d2m, D2s, D2m, d3s, d4s, EP01, EP12, CP2, d0s, d0m, L, etc. are marked in it to clearly and intuitively understand the meaning of these parameters. For the convenience of describing the surface shape of the optical imaging lens and specific lenses, these parameters will no longer be shown in the drawings in the subsequent description of specific embodiments.

[0092] Next, with reference to the drawings, specific examples of the surface shape and parameters of the optical imaging lens applicable to the above embodiments will be further described.

[0093] It should be noted that in the following Embodiment 1, there are Embodiment 1-1, Embodiment 1-2, and Embodiment 1-3; in Embodiment 2, there are Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3; in Embodiment 3, there are Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3. The parameters such as the curvature radius and central thickness of the first lens to the sixth lens of the optical imaging lens under the three embodiments in the same embodiment, the spacing distance between the lenses, and the high-order term coefficients are the same, but the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel, the first spacer element, the second spacer element, and the third spacer element, as well as the shapes of some lenses are different. Or rather, the main structures for imaging are the same, while the auxiliary structures for imaging are different.

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

[0095] Embodiment 1

[0096] As Figures 2 to 8 shown, the optical imaging lens of Embodiment 1 is described. Figure 2 The structural schematic diagram of the optical imaging lens of Embodiment 1-1 is shown, Figure 3 The structural schematic diagram of the optical imaging lens of Embodiment 1-2 is shown, Figure 4 The structural schematic diagram of the optical imaging lens of Embodiment 1-3 is shown.

[0097] As Figures 2 to 4 shown, the optical imaging lens includes a lens barrel P0, six lenses, and a plurality of 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 arranged in sequence from the object side to the image side.

[0098] As Figure 2As shown in the figure, it is a schematic structural diagram of the optical imaging lens of Embodiment 1-1. In this embodiment, the optical imaging lens further includes a second auxiliary spacer element P2b, and the object side S1 of the first lens is spaced from the lens barrel. The object side and the image side of the first spacer element are in partial contact with the image side S2 of the first lens and the object side S3 of the second lens, respectively. The object side and the image side of the second spacer element are in partial contact with the image side S4 of the second lens and the object side of the second auxiliary spacer element, respectively. The image side of the second auxiliary spacer element and the object side S5 of the third lens are in partial contact. The object side and the image side of the third spacer element are in partial contact with the image side S6 of the third lens and the object side S7 of the fourth lens, respectively. The object side and the image side of the fourth spacer element are in partial contact with the image side S8 of the fourth lens and the object side S9 of the fifth lens, respectively. The image side S10 of the fifth lens is in partial contact with the lens barrel. The object side of the fifth spacer element is in partial contact with the lens barrel. The image side of the fifth spacer element is in partial contact with the object side S11 of the sixth lens. The image side S12 of the sixth lens is spaced from the lens barrel.

[0099] As Figure 3 shown in the figure, it is a schematic structural diagram of the optical imaging lens of Embodiment 1-2. In this embodiment, the image side S10 of the fifth lens is in partial contact with the object side of the fifth spacer element. The image side of the fifth spacer element is in partial contact with the lens barrel. The object side S11 of the sixth lens is in partial contact with the lens barrel. The optical imaging lens also includes a second auxiliary spacer element P2b. The abutting and contacting manners of the second auxiliary spacer element P2b and other spacer elements are the same as those in Embodiment 1-1. For relevant descriptions, reference can be made to Embodiment 1-1, and details are not described here.

[0100] As Figure 4 shown in the figure, it is a schematic structural diagram of the optical imaging lens of Embodiment 1-3. In this embodiment, the optical imaging lens further includes a fifth auxiliary spacer element P5b. The image side of the second lens is in partial contact with the lens barrel. The object side of the second spacer element is in partial contact with the lens barrel. The image side of the second spacer element is in partial contact with the object side S5 of the third lens. The fifth auxiliary spacer element P5b is located between the fifth spacer element P5 and the sixth lens E6. The object side of the fifth spacer element is in partial contact with the image side S10 of the fifth lens. The object side and the image side of the fifth auxiliary spacer element are in partial contact with the image side of the fifth spacer element and the object side S11 of the sixth lens, respectively. The abutting and contacting manners of other spacer elements are the same as those in Embodiment 1-1. For relevant descriptions, reference can be made to Embodiment 1-1, and details are not described here.

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

[0102] In Embodiment 1, the first lens E1 has a negative optical power. The object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has a positive optical power. The object side S3 of the second lens is concave, and the image side S4 of the second lens is convex. The third lens E3 has a positive optical power. The object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens E4 has a negative optical power. The object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens E5 has a positive optical power. The object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has a negative optical power. The object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. Among them, OBJ (not shown in the figure) in Table 1 below is the object surface of the optical imaging lens, S13 (not shown in the figure) and S14 (not shown in the figure) can be the object side and the image side of the filter or the protective glass, S15 (not shown in the figure) is the imaging surface of the optical imaging lens, and STO (not shown in the figure) is the aperture stop, and the aperture stop is located between the second lens and the third lens. The light rays from the object surface pass through S1 to S14 in sequence and reach S15 (imaging surface).

[0103] Table 1 shows the basic structural parameter table of the optical imaging lens in Embodiment 1. Among them, the units of the radius of curvature and the thickness are both millimeters (mm).

[0104] Table 1

[0105]

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

[0107] Formula (1)

[0108] Among them, x is the sagitta, the distance from the vertex of the aspherical surface when the aspherical surface is along the optical axis direction at a position with a height of h; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 that can be used for the aspherical surfaces S1 - S12 in Embodiment 1.

[0109] Table 2

[0110]

[0111] Figure 5Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of the focusing points of light rays of different wavelengths after passing through the optical imaging lens. Figure 6 Shows the astigmatism curve of the optical imaging lens of Embodiment 1, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 7 Shows the distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude values corresponding to different field angles. Figure 8 Shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights on the imaging plane after the light rays pass through the lens.

[0112] According to Figures 5 to 8 it can be known that the optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0113] Embodiment 2

[0114] As Figures 9 to 15 shown, the optical imaging lens of Embodiment 2 is described. Figure 9 Shows the structural schematic diagram of the optical imaging lens of Embodiment 2-1, Figure 10 Shows the structural schematic diagram of the optical imaging lens of Embodiment 2-2, Figure 11 Shows the structural schematic diagram of the optical imaging lens of Embodiment 2-3.

[0115] As Figures 9 to 11 shown, the optical imaging lens includes a lens barrel P0, six lenses and a plurality of 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 arranged in sequence from the object side to the image side.

[0116] As Figure 9 shown, it is the structural schematic diagram of the optical imaging lens of Embodiment 2-1. In this embodiment, the object side surface S1 of the first lens is spaced from the lens barrel. The object side surface and the image side surface of the first spacer element P1 are in partial contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens respectively. The object side surface and the image side surface of the second spacer element are in partial contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens respectively. The object side surface and the 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 S7 of the fourth lens respectively. The object side surface and the image side surface of the fourth spacer element are in partial contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens respectively. The object side surface of the fifth spacer element is in partial contact with the image side surface S10 of the fifth lens. The image side surface of the fifth spacer element is in partial contact with the lens barrel. The object side surface S11 of the sixth lens is in partial contact with the lens barrel. The image side surface S12 of the sixth lens is spaced from the lens barrel.

[0117] As Figure 10 shown, it is a schematic structural diagram of the optical imaging lens of Embodiment 2-2. In this embodiment, the image side S10 of the fifth lens contacts the barrel part, the object side of the fifth spacer element contacts the barrel part, the image side of the fifth spacer element partially contacts the object side S11 of the sixth lens, and the bearing and abutting manners of the other spacer elements are the same as those in Embodiment 2-1. For the relevant descriptions in Embodiment 2-1, reference can be made, and details will not be elaborated here.

[0118] As Figure 11 shown, it is a schematic structural diagram of the optical imaging lens of Embodiment 2-3. In this embodiment, the image side S10 of the fifth lens contacts the barrel part, the object side of the fifth spacer element contacts the barrel part, the image side of the fifth spacer element partially contacts the object side S11 of the sixth lens, and the bearing and abutting manners of the other spacer elements are the same as those in Embodiment 2-1. For the relevant descriptions in Embodiment 2-1, reference can be made, and details will not be elaborated here.

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

[0120] In Embodiment 2, the first lens E1 has a negative optical power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has a positive optical power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is convex. The third lens E3 has a positive optical power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens E4 has a negative optical power, the object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is concave. The fifth lens E5 has a positive optical power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is convex. The sixth lens E6 has a negative optical power, the object side S11 of the sixth lens is concave, and the image side S12 of the sixth lens is convex. Among them, OBJ (not shown in the figure) in Table 3 below is the object surface of the optical imaging lens, S13 (not shown in the figure) and S14 (not shown in the figure) can be the object side and image side of the filter or protective glass, S15 (not shown in the figure) is the imaging surface of the optical imaging lens, and STO (not shown in the figure) is the aperture stop, and the aperture stop is located between the second lens and the third lens. The light rays from the object surface pass through S1 to S14 in sequence and reach S15 (imaging surface).

[0121] Table 3 shows the basic structural parameter table of the optical imaging lens in Embodiment 2, where the units of the radius of curvature and thickness are both millimeters (mm).

[0122] Table 3

[0123]

[0124] Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 for each aspherical mirror surface S1 - S12 in Example 2. Among them, each aspherical surface type 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 in Example 2 is shown, which represents the deviation of the focusing points of light rays with different wavelengths after passing through the optical imaging lens. Figure 13 The astigmatism curve of the optical imaging lens in Example 2 is shown, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 14 The distortion curve of the optical imaging lens in Example 2 is shown, which represents the distortion magnitude values corresponding to different field angles. Figure 15 The lateral chromatic aberration curve of the optical imaging lens in Example 2 is shown, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0128] According to Figures 12 to 15 it can be seen that the optical imaging lens given in Example 2 can achieve good imaging quality.

[0129] Example 3

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

[0131] As Figures 16 to 18 shown, the optical imaging lens includes a lens barrel P0, six lenses and a plurality of 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 arranged in sequence from the object side to the image side.

[0132] As Figure 16As shown, it is a schematic structural diagram of the optical imaging lens of Embodiment 3-1. In this embodiment, the optical imaging lens further includes a third auxiliary spacer element P3b. The third auxiliary spacer element P3b is located between the third spacer element P3 and the fourth lens E4. The object side surface S1 of the first lens is spaced from the lens barrel. The object side surface and the image side surface of the first spacer element are respectively in partial contact with the image side surface S2 of the first lens and the object side surface S3 of the second lens. The object side surface and the image side surface of the second spacer element are respectively in partial contact with the image side surface S4 of the second lens and the object side surface S5 of the third lens. The object side surface and the image side surface of the third spacer element are respectively in partial contact with the image side surface S6 of the third lens and the object side surface of the third auxiliary spacer element. The image side surface of the third auxiliary spacer element is in partial contact with the object side surface S7 of the fourth lens. The object side surface and the image side surface of the fourth spacer element are respectively in partial contact with the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens. 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. The image side surface S12 of the sixth lens is spaced from the lens barrel.

[0133] As Figure 17 shown, it is a schematic structural diagram of the optical imaging lens of Embodiment 3-2. In this embodiment, the object side surface and the image side surface of the third spacer element are respectively in partial contact with the image side surface S6 of the third lens and the object side surface S7 of the fourth lens. The image side surface S10 of the fifth lens is in partial contact with the object side surface of the fifth spacer element. The image side surface of the fifth spacer element is in partial contact with the lens barrel. The object side surface S11 of the sixth lens is in partial contact with the lens barrel. The bearing and abutting manners of each spacer element are the same as those in Embodiment 3-1. For the relevant descriptions, reference can be made to Embodiment 3-1, and details will not be elaborated here.

[0134] As Figure 18 shown, it is a schematic structural diagram of the optical imaging lens of Embodiment 3-3. In this embodiment, the optical imaging lens further includes a third auxiliary spacer element P3b. The third auxiliary spacer element P3b is located between the third spacer element P3 and the fourth lens E4. The bearing and abutting manners of each spacer element are the same as those in Embodiment 3-1. For the relevant descriptions, reference can be made to Embodiment 3-1, and details will not be elaborated here.

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

[0136] In Embodiment 3, the first lens E1 has a negative optical power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has a negative optical power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens E3 has a positive optical power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens E4 has a negative optical power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens E5 has a positive optical power, the object side S9 of the fifth lens is concave, and the image side S10 of the fifth lens is convex. The sixth lens E6 has a negative optical power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. Among them, OBJ (not shown in the figure) in Table 5 below is the object surface of the optical imaging lens, S13 (not shown in the figure) and S14 (not shown in the figure) can be the object side and the image side of the filter or the protective glass, S15 (not shown in the figure) is the imaging surface of the optical imaging lens, and STO (not shown in the figure) is the aperture stop, and the aperture stop is located between the second lens and the third lens. The light rays from the object surface sequentially pass through S1 to S14 and reach S15 (imaging surface).

[0137] Table 5 shows the basic structural parameter table of the optical imaging lens of Embodiment 3, where the units of the radius of curvature and the thickness are both millimeters (mm).

[0138] Table 5

[0139]

[0140] The following Table 6 gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 of the aspherical mirror surfaces S1 - S12 that can be used in Embodiment 3. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0141] Table 6

[0142]

[0143] Figure 19 Shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the convergence points of light rays of different wavelengths after passing through the optical imaging lens. Figure 20 Shows the astigmatism curve of the optical imaging lens of Embodiment 3, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 21 Shows the distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different field angles. Figure 22 Shows the longitudinal chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging surface after passing through the lens.

[0144] According to Figures 19 to 22 it can be seen that the optical imaging lens given in the third embodiment can achieve good imaging quality.

[0145] In summary, the optical imaging lenses of the first to third embodiments respectively satisfy the relationships shown in Table 7.

[0146] Table 7

[0147]

[0148] Table 8 shows some parameters (unit: mm) of the optical imaging lenses of the first to third embodiments.

[0149] Table 8

[0150]

[0151] The present application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

[0152] Obviously, the above-described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0153] It should be noted that the terms used herein are only for describing specific embodiments, rather than intending 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 specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0154] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0155] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical imaging lens, characterized in that: The invention comprises a lens barrel and 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 has negative optical power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface, the third lens has positive optical power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface, the fourth lens has negative optical power, and the image side surface of the fourth lens is a concave surface, the fifth lens has positive optical power, and the image side surface of the fifth lens is a convex surface, and the sixth lens has negative optical 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 portion 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: 9.14 mm ≤ f × ​​tan (HFOV) < 13.05 mm; An inner diameter d1s of the object side surface of the first spacer element, a curvature radius R1 of the object side surface of the first lens, and an 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 spacing 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: 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 the following: 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 surface of the lens barrel to the image side end surface of the lens barrel, and a 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 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 from the object-side end surface of the lens barrel to 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, characterized in that: The spacer element group also includes a second spacer element, which is located between the second lens and the third lens. 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 the following: 1.50<EP12 / EP01<2.

33.

11. The optical imaging lens according to any one of claims 1 to 9, characterized in that: 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.

12. The optical imaging lens according to any one of claims 1 to 9, characterized in that: 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 of the first spacer element, the outer diameter D2s of the object side 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: 0.04≤(D1s-D2s) / EP12<1.

50.

13. The optical imaging lens according to any one of claims 1 to 9, characterized in that: 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, characterized in that: 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: 0.30<CT2 / D2s<0.

85.

15. The optical imaging lens according to any one of claims 1 to 9, characterized in that: 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.

16. The optical imaging lens according to any one of claims 1 to 9, characterized in that: 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 portion 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, characterized in that: 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.

Images