Optical lens

Abstract

The invention provides an optical lens. The optical lens comprises a lens barrel and first to sixth lenses arranged in the lens barrel, the first lens has negative focal 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 spacing element group at least comprises a first spacing element; the first spacing element is positioned between the first lens and the second lens and is at least partially contacted with the image side surface of the first lens; the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens meet the condition of 5.10 lt; r1 / R2 < = 13.00; the outer diameter D1s of the object side surface of the first spacing element and the maximum effective radius DT11 of the object side surface of the first lens meet the following conditions: 2.50 lt; d1s / DT11lt, D1s / DT11lt; and 3.70. According to the invention, the problem that the optical lens in the prior art easily causes the deformation of the first lens while meeting the imaging requirement in a dark environment is solved.

Description

Technical Field

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

[0002] With the development of technology, more and more electronic products have a camera function, and the optical lens essential for realizing the camera function is also gradually developing. It is required that the optical lens can still form clear images in a variety of scenarios. Especially, the applications in scenarios such as at night, in the evening, and in the early morning are gradually increasing, and the demand for the optical lens to image in a dark environment is gradually increasing. Usually, in order to meet the imaging requirements of the optical lens in a dark environment, the curvature of the object side of the first lens is increased to collect large-angle light. However, this easily causes the bending degrees on both sides of the first lens to be different, and the stress on the optical structure area of the first lens is relatively large during the assembly process, which is likely to affect the surface shape of the first lens. For example, problems such as slight edge breakage, chipping in the optical structure area of the first lens, and bending deformation of the first lens may occur.

[0003] That is to say, in the prior art, the optical lens has the problem that while meeting the imaging requirements in a dark environment, it is easy to cause deformation of the first lens. Summary of the Invention

[0004] The main object of the present invention is to provide an optical lens to solve the problem in the prior art that the optical lens is easy to cause deformation of the first lens while meeting the imaging requirements in a dark environment.

[0005] To achieve the above object, according to one aspect of the present invention, there is provided an optical lens, including a lens barrel, a lens group, and a spacer element group disposed 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 focal power. The object side of the first lens is a convex surface, and the image side of the first lens is a concave surface. 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 at least partially contacts the image side of the first lens. The following relationships are satisfied between the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens: 5.10 < R1 / R2 ≤ 13.00. The following relationship is satisfied between the outer diameter D1s of the object side of the first spacer element and the maximum effective radius DT11 of the object side of the first lens: 2.50 < D1s / DT11 < 3.70.

[0006] According to another aspect of the present invention, there is provided an optical lens, including 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 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 direction. The first lens has a negative focal power, the second lens has a positive focal power, the third lens has a positive focal power, the fourth lens has a negative focal power, the fifth lens has a positive focal power, and the sixth lens has a 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 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 at least partially in contact with the image side surface of the first lens; the following relationship is satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00; the following relationship is satisfied between 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 effective focal length f of the optical lens: 1.25 < (D1s - d1s) / f < 2.65.

[0007] According to another aspect of the present invention, there is provided an optical lens, including 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 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 direction. The first lens has a 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 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 at least partially in contact with the image side surface of the first lens; the following relationship is satisfied between the outer diameter D0s of the object side end surface of the lens barrel and the inner diameter d1s of the object side surface of the first spacer element: 2.75 < D0s / d1s < 4.59, and the following relationship is satisfied between the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element: 2.55 < R1×N1 / (D1s - d1s) < 8.35.

[0008] The following relationship is satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00; the following relationship is satisfied between 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 effective focal length f of the optical lens: 1.25 < (D1s - d1s) / f < 2.65.

[0009] Furthermore, the following relationship is satisfied between the outer diameter D1s of the object side surface of the first spacer element and the effective focal length f1 of the first lens: -3.38 < D1s / f1 < -2.03.

[0010] Furthermore, the distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer element in the optical axis direction, and the axial distance SAG11 between the intersection of the object-side surface of the first lens and the optical axis and the vertex of the effective radius of the object-side surface of the first lens satisfy: 4.50 < EP01 / SAG11 < 9.35.

[0011] Furthermore, 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 effective focal length f of the optical lens satisfy: 1.25 < (D1s - d1s) / f < 2.65.

[0012] Furthermore, the spacer element group further includes a second spacer element. The second spacer element is located between the second lens and the third lens and at least partially contacts the image-side surface of the second lens. The combined focal length f12 of the first lens and the second lens, the radius of curvature R4 of the image-side surface of the second lens, the air gap T12 between the first lens and the second lens on the optical axis, and the distance EP12 between the first spacer element and the second spacer element in the optical axis direction satisfy: -10.15 < f12 / R4 × (EP12 / T12) < -4.95.

[0013] Furthermore, the spacer element group further includes a second spacer element. The second spacer element is located between the second lens and the third lens and at least partially contacts the image-side surface of the second lens. The distance EP12 between the first spacer element and the second spacer element in the optical axis direction and the central thickness CT2 of the second lens satisfy: 0.90 < EP12 / CT2 < 1.25.

[0014] Furthermore, the second lens has a positive optical power. The spacer element group further includes a second spacer element. The second spacer element is located between the second lens and the third lens and at least partially contacts the image-side surface of the second lens. The inner diameter d2s of the object-side surface of the second spacer element, the outer diameter D2s of the object-side surface of the second spacer element, the effective focal length f2 of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: -4.55 < f2 / R4 × (D2s / d2s) < -2.96.

[0015] Furthermore, 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 at least partially contacts the image-side surface of the second lens. The third spacer element is located between the third lens and the fourth lens and at least partially contacts the image-side surface of the third lens. The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the central thickness CT3 of the third lens, and the distance EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy: 1.35 < (T23 + CT3 + T34) / EP23 < 1.75.

[0016] Further, the fourth lens has a negative optical power, the spacer element group further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and at least partially contacts the image side surface of the third lens, and the following is satisfied among the outer diameter D3m of the image side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, and the effective focal length f4 of the fourth lens: -2.00 < (D3m - d3m) / f4 < -1.60.

[0017] Further, the spacer element group further includes a third spacer element and a fourth spacer element, the third spacer element is located between the third lens and the fourth lens and at least partially contacts the image side surface of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and at least partially contacts the image side surface of the fourth lens, and the following is satisfied among the inner diameter d4s of the object side surface of the fourth spacer element, the inner diameter d3s of the object side surface of the third spacer element, and the center thickness CT4 of the fourth lens: 1.16 < (d4s - d3s) / CT4 < 2.10.

[0018] Further, the spacer element group further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and at least partially contacts the image side surface of the fifth lens, and the following is satisfied among the inner diameter d0m of the image side end surface of the lens barrel, the fifth spacer element d5m, and the combined focal length f45 of the fourth lens and the fifth lens: -1.34 < (d0m - d5m) / f45 < -0.61.

[0019] Further, the fifth lens has a positive optical power, the spacer element group further includes a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and at least partially contacts the image side surface of the fifth lens, and the following is satisfied among the inner diameter d5m of the image side surface of the fifth spacer element and the effective focal length f5 of the fifth lens: 2.31 < f5 / d5m < 2.80.

[0020] Further, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex; the sixth lens has a negative optical power, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave.

[0021] Further, the object side surface of the second lens is convex; 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 object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave.

[0022] Applying the technical solution of the present invention, an optical 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. 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 direction. The first lens has a 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 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 at least partially in contact with the image side surface of the first lens. The following conditions are satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00. The following conditions are satisfied between the outer diameter D1s of the object side surface of the first spacer element and the maximum effective radius DT11 of the object side surface of the first lens: 2.50 < D1s / DT11 < 3.70.

[0023] The optical lens of the present application is composed of a lens barrel, six lenses and at least one spacer element. The object side surface of the first lens is convex, and the image side surface of the first lens is concave. When the following conditions are satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00, the difference in the bending degree between the object side surface and the image side surface of the first lens is large. The image side surface of the first lens has a large bending degree, which easily causes the stress borne by the first lens to be concentrated in the optical structure area of the first lens, and then easily leads to deformation of the first lens, and slight edge breakage, cracks, etc. are generated in the optical structure area of the first lens, affecting the appearance of the optical lens. It may also cause cracks to extend to the optical effective area and affect the optical performance. In order to reduce the problem of deformation of the first lens, the present application constrains D1s / DT11 within a reasonable range, which can constrain the bearing range between the first lens and the first spacer element, disperse the stress in the first lens while ensuring the assembly stability, and reduce the risk of deformation of the first lens. If D1s / DT11 is less than 2.50, the bearing position between the first lens and the first spacer element is short, resulting in a limited adsorption space during the assembly of the first lens, causing stress concentration and affecting the surface shape of the lens. At the same time, the ratio of D1s / DT11 is small, and the effective lens positions of the first lens and the second lens far from the optical axis are close to the first spacer element. Stress concentration easily affects the optical performance of the lens and easily affects the field curvature or distortion of the optical lens. If D1s / DT11 is less than 3.70, the outer diameter of the first lens is large, and the step difference between the outer diameter of the first lens and the outer diameter of the second lens is large, resulting in stress concentration at the position where the first lens and the second lens are opposite to each other, still increasing the risk of bending deformation of the first lens. Description of the Drawings

[0024] The accompanying drawings of the specification, which form a part of this application, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 Shows the dimension marking diagram of the optical imaging lens of an alternative embodiment of the present invention;

[0026] Figure 2 Shows the schematic structural diagram of the optical imaging lens of Embodiment 1-1 of the present invention;

[0027] Figure 3 Shows the schematic structural diagram of the optical imaging lens of Embodiment 1-2 of the present invention;

[0028] Figure 4 Shows the schematic structural diagram of the optical imaging lens of Embodiment 1-3 of the present invention;

[0029] Figures 5 to 7 Respectively show the axial chromatic aberration, astigmatism curve and lateral chromatic aberration curve of the optical imaging lens of Embodiment 1 of the present invention;

[0030] Figure 8 Shows the schematic structural diagram of the optical imaging lens of Embodiment 2-1 of the present invention;

[0031] Figure 9 Shows the schematic structural diagram of the optical imaging lens of Embodiment 2-2 of the present invention;

[0032] Figure 10 Shows the schematic structural diagram of the optical imaging lens of Embodiment 2-3 of the present invention;

[0033] Figures 11 to 13 Respectively show the axial chromatic aberration, astigmatism curve and lateral chromatic aberration curve of the optical imaging lens of Embodiment 2 of the present invention;

[0034] Figure 14 Shows the schematic structural diagram of the optical imaging lens of Embodiment 3-1 of the present invention;

[0035] Figure 15 Shows the schematic structural diagram of the optical imaging lens of Embodiment 3-2 of the present invention;

[0036] Figure 16 Shows the schematic structural diagram of the optical imaging lens of Embodiment 3-3 of the present invention;

[0037] Figures 17 to 19 Respectively show the axial chromatic aberration, astigmatism curve and lateral chromatic aberration curve of the optical imaging lens of Embodiment 3 of the present invention;

[0038] Figure 20Shows the force diagram of an optical lens according to an alternative embodiment of the present invention;

[0039] Figure 21 Shows the force diagram of an optical lens in an example;

[0040] Figure 22 Shows the force diagram of an optical lens in an example.

[0041] Among them, the above-mentioned drawings include the following reference numerals:

[0042] E1, the first lens; P1, the first spacer element; E2, the second lens; P2, the second spacer element; E3, the third lens; P3, the third spacer element; E4, the fourth lens; P4, the fourth spacer element; E5, the fifth lens; P5, the fifth spacer element; E6, the sixth lens; S1, the object side of the first lens; S2, the image side of the first lens; S3, the object side of the second lens; S4, the image side of the second lens; S5, the object side of the third lens; S6, the image side of the third lens; S7, the object side of the fourth lens; S8, the image side of the fourth lens; S9, the object side of the fifth lens; S10, the image side of the fifth lens; S11, the object side of the sixth lens; S12, the image side of the sixth lens. Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0044] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0045] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present invention.

[0046] It should be noted that, in this specification, the expressions such as the first, second, and third are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0047] In the accompanying drawings, for the sake of clarity, the thickness, dimensions, and shape of the lens have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are presented by way of example. That is, the spherical or aspherical shapes are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to an exact scale.

[0048] 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 determination of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in the field, using the R value (R refers to the radius of curvature in the paraxial region, usually the R value in the lens database of optical software). The sign of the R value is used to determine whether it is convex or concave. 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.

[0049] To solve the problem in the prior art that an optical lens is prone to deformation of the first lens while meeting the imaging requirements in a dark environment, the present invention provides an optical lens.

[0050] As Figures 1 to 19 shown, the optical 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, and the image side surface of the first lens is concave. 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 at least partially in contact with the image side surface of the first lens. The following relationships are satisfied between the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00. The following relationship is satisfied between the outer diameter D1s of the object side surface of the first spacer element and the maximum effective radius DT11 of the object side surface of the first lens: 2.50 < D1s / DT11 < 3.70.

[0051] The optical lens of the present application consists of a lens barrel, six lenses and at least one spacer element. The object side of the first lens is convex, and the image side of the first lens is concave. When the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: 5.10 < R1 / R2 ≤ 13.00, the difference in the bending degree between the object side and the image side of the first lens is large, and the bending degree of the image side of the first lens is large, which easily causes the stress borne by the first lens to concentrate in the optical structure area of the first lens, and then easily causes the first lens to deform, and slight edge breakage, cracks, etc. occur in the optical structure area of the first lens, affecting the appearance of the optical lens, and may also cause cracks to extend to the optical effective area, affecting the optical performance. In order to reduce the problem of deformation of the first lens, the present application confines D1s / DT11 within a reasonable range, which can confine the bearing range between the first lens and the first spacer element, disperse the stress in the first lens while ensuring the assembly stability, and reduce the risk of deformation of the first lens. If D1s / DT11 is less than 2.50, the bearing position between the first lens and the first spacer element is short, resulting in limited adsorption space during the assembly of the first lens, causing stress concentration and affecting the surface shape of the lens. At the same time, the ratio of D1s / DT11 is small, and the effective lens positions of the first lens and the second lens far from the optical axis are close to the first spacer element, and the stress concentration is likely to affect the optical performance of the lens and is likely to affect the field curvature or distortion of the optical lens. If D1s / DT11 is less than 3.70, the outer diameter of the first lens is large, and the step difference between the outer diameter of the first lens and the second lens is large, resulting in stress concentration at the position where the first lens and the second lens are opposite to each other, still increasing the risk of bending deformation of the first lens.

[0052] In addition, referring to Table 1 below and Figures 20 to 22 shown, Figure 20 shows the force diagram of the optical lens when R1 / R2 = 8 and D1s / DT11 = 3. Figure 21 shows the force diagram of the optical lens when R1 / R2 = 8 and D1s / DT11 = 2. Figure 22 shows the force diagram of the optical lens when R1 / R2 = 8 and D1s / DT11 = 4.

[0053] By Figures 20 to 22As can be seen, when the optical imaging lens satisfies R1 / R2 = 8 and D1s / DT11 = 3, the force on the first lens is relatively uniform. Only a certain point in the optical structure area is subjected to a large force, but only a certain point in the structure area on the image side of the first lens is subjected to a large force, while the force on other positions is small, ensuring the uniformity of the force on the first lens. When the optical lens satisfies R1 / R2 = 8 and D1s / DT11 = 2, the optical structure area on the image side of the first lens is subjected to a large force, and the force on the optical effective area of the first lens also increases significantly, which easily increases the sensitivity of the first lens and causes the first lens to bend easily. When the optical lens satisfies R1 / R2 = 8 and D1s / DT11 = 4, the optical structure area on the image side of the first lens is subjected to a large force, and the positions with large force almost cover the entire optical structure area, which easily increases the risk of bending deformation of the first lens. Therefore, by restricting 2.50 < D1s / DT11 < 3.70 in this application, the bearing range between the first lens and the first spacer element can be controlled, the stress in the first lens can be dispersed while ensuring the assembly stability, and the risk of deformation of the first lens can be reduced.

[0054]

[0055]

[0056] Table 1

[0057] It should be noted that in this application, D1s / DT11 is restricted within a reasonable range, the relationship between the first lens and the first spacer element is restricted, the bearing range between the first lens and the first spacer element is controlled, and the aperture of the first lens is controlled. While ensuring the assembly stability, the stress in the first lens is dispersed, and the risk of deformation of the first lens is reduced, solving the problem of deformation of the first lens caused when 5.10 < R1 / R2 ≤ 13.00 is within the range of 5.10 to 13.0. When D1s / DT11 satisfies the above range, the risk of deformation of the first lens 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 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 be convex or concave according to the design requirements of the optical system. When the optical system satisfies 5.10 < R1 / R2 ≤ 13.00; 2.50 < D1s / DT11 < 3.70, the optical imaging lens can improve the assembly stability.

[0058] For example, in some alternative embodiments, the second lens has a positive optical power, which can balance the aberration brought by the first lens and improve the imaging quality. For another example, in some alternative embodiments, the third lens has a positive optical power, which appropriately converges the light rays to make the light rays smoothly transition to the rear. For another example, in some alternative embodiments, the fourth lens has a negative optical power, which balances the aberration brought by the front lens and improves the imaging quality. At the same time, the fourth lens appropriately diverges the light rays, which is beneficial to the smooth transition of the light rays to the rear optical system. For another example, in some alternative embodiments, the fifth lens has a positive optical power, which can appropriately converge the light rays to avoid serious light diffusion and mismatch with the chip. For another example, in some alternative embodiments, the sixth lens has a negative optical power, which can balance the aberration brought by the front positive lens and improve the imaging quality, and at the same time matches with the chip. 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. The object side surface of the second lens is convex, and the image side surface of the second lens is convex. The object side surface of the third lens is convex, and the image side surface of the third lens is convex. The object side surface of the fourth lens is convex, and the image side surface of the fourth lens is concave. The object side surface of the fifth lens is convex, and the image side surface of the fifth lens is convex. The object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave. By reasonably constraining the surface types of each lens, it is beneficial to reasonably constrain the light ray trend, ensure the smooth transition of the light rays, and is beneficial to correcting the aberration. The optical imaging lens can be simulated through software and / or tools such as ZEMAX, CODEV, etc. Preferably, the optical imaging lens can be simulated through ZEMAX. During the simulation using the software and / or tools such as those described above, the surface types of the surfaces of each lens can be simulated according to the built-in surface types of the used software and / or the used tools and appropriately adjusted.

[0059] In some alternative embodiments, the outer diameter D1s of the object side surface of the first spacer element and the effective focal length f1 of the first lens satisfy: -3.38 < D1s / f1 < -2.03. By constraining D1s / f1 within a reasonable range, the outer diameter of the first lens can be constrained, the adsorption space between the first lens and the first spacer element can be ensured, and a large step difference between the outer diameter of the first lens and the outer diameter of the second lens can be prevented, which is beneficial to improving the assembly stability. At the same time, the degree of deflection of the light rays in the first lens can be controlled so that the imaging light rays exiting from the first lens can smoothly pass through the first spacer element, which is beneficial to ensuring the optical performance of the optical lens.

[0060] In some alternative embodiments, the distance EP01 between the object-side end face of the lens barrel and the object-side face of the first spacer element in the optical axis direction, and the axial distance SAG11 between the intersection of the object-side face of the first lens and the optical axis and the vertex of the effective radius of the object-side face of the first lens satisfy: 4.50 < EP01 / SAG11 < 9.35. By constraining EP01 / SAG11 within a reasonable range, the relationship between the space between the object-side end face of the lens barrel and the first spacer element and the bending degree of the object-side face of the first lens can be constrained, so as to prevent the object-side face of the first lens from protruding out of the lens barrel, reduce the risk of appearance defects in the production process of the optical lens, and improve the production yield of the optical lens.

[0061] In some alternative embodiments, 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 effective focal length f of the optical lens satisfy: 1.25 < (D1s - d1s) / f < 2.65. By constraining (D1s - d1s) / f within a reasonable range, the bearing range between the first spacer element and the first lens can be ensured. While ensuring the bearing stability of the first lens, the stray light at the optical structure area position between the first lens and the second lens can be absorbed, which is beneficial to improving the imaging quality of the optical lens. At the same time, the relationship between the size of the first spacer element and the effective focal length of the optical lens is constrained, which is beneficial to constraining the size of the lens barrel, avoiding the mismatch between the size of the lens barrel and the focal length of the optical system, and is beneficial to improving the assembly stability of the optical lens.

[0062] In some alternative embodiments, the outer diameter D0s of the object-side end face of the lens barrel and the inner diameter d1s of the object-side face of the first spacer element satisfy: 2.75 < D0s / d1s < 4.59. By constraining D0s / d1s within a reasonable range, the thickness of the lens barrel can be ensured to be within a reasonable range to ensure the structural strength of the lens barrel, thereby ensuring the assembly stability of the optical lens and the whole machine. At the same time, the shading range of the first spacer element on the first lens can also be constrained to reduce the reflected stray light at the flange position of the image-side face of the first lens and improve the imaging quality of the optical lens.

[0063] In some alternative embodiments, the spacer element group further includes a second spacer element, which is located between the second lens and the third lens and at least partially contacts the image side surface of the second lens. The combined focal length f12 of the first lens and the second lens, the radius of curvature R4 of the image side surface of the second lens, the air gap T12 between the first lens and the second lens on the optical axis, and the spacer distance EP12 between the first spacer element and the second spacer element in the optical axis direction satisfy: -10.15 < f12 / R4 × (EP12 / T12) < -4.95. By constraining f12 / R4 × (EP12 / T12) within a reasonable range, the overall path of light transmission in the first lens and the second lens can be constrained, and at the same time, the exit angle of light from the second lens can be controlled to ensure that the light smoothly passes through the second spacer element and enters the rear optical system, so as to ensure the stability of the lens optical performance. At the same time, the risk of baking deformation caused by too large an air gap between the lenses can be avoided, further ensuring the stability of the optical performance.

[0064] In some alternative embodiments, the spacer element group further includes a second spacer element, which is located between the second lens and the third lens and at least partially contacts the image side surface of the second lens. The spacer distance EP12 between the first spacer element and the second spacer element in the optical axis direction and the central thickness CT2 of the second lens satisfy: 0.90 < EP12 / CT2 < 1.25. By restricting EP12 / CT2 within a reasonable range, the relationship between the edge thickness and the central thickness of the second lens can be constrained, ensuring that the difference between the edge thickness and the central thickness of the second lens is small, which is beneficial to ensuring the consistency of the overall wall thickness of the second lens, preventing the occurrence of forming appearance problems in the effective diameter area of the lens, thereby affecting the performance of the optical lens, and preventing the problem of forming stray light.

[0065] In some alternative embodiments, the second lens has a positive optical power. The spacer element group further includes a second spacer element, which is located between the second lens and the third lens and at least partially contacts the image side surface of the second lens. The inner diameter d2s of the object side surface of the second spacer element, the outer diameter D2s of the object side surface of the second spacer element, the effective focal length f2 of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: -4.55 < f2 / R4 × (D2s / d2s) < -2.96. By constraining f2 / R4 × (D2s / d2s) within a reasonable range, the relationship between the inner and outer diameter dimensions of the second spacer element and the radius of curvature of the image side surface of the second lens can be constrained to ensure the bearing range between the second lens and the second spacer element, avoiding the situation where the free part of the second spacer element has too long a cantilever and the second spacer element deflects after the lens is baked, ensuring the imaging performance of the lens, and at the same time controlling the deflection angle of light when passing through the second lens, ensuring accurate light transmission while reducing the sensitivity of the optical performance of the second lens.

[0066] 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 at least partially contacts the image side surface of the second lens. The third spacer element is located between the third lens and the fourth lens and at least partially contacts the image side surface of the third lens. The air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the fourth lens on the optical axis, the central thickness CT3 of the third lens, and the spacer distance EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy: 1.35 < (T23 + CT3 + T34) / EP23 < 1.75. By constraining (T23 + CT3 + T34) / EP23 within a reasonable range, the distance between the second lens and the fourth lens can be constrained, and further, the ratio of the edge thickness to the central thickness of the third lens can be constrained, avoiding the problem that it is difficult to process and form due to the excessive difference between the edge thickness and the central thickness of the third lens, ensuring the processability of the third lens, and further avoiding the problem of affecting the appearance of the third lens during the demolding process, improving the production yield of the third lens. At the same time, the air gaps in the second lens to the fourth lens are constrained, reducing the influence of the air gaps on the back focal sensitivity.

[0067] In some alternative embodiments, the fourth lens has a negative optical power. The spacer element group further includes a third spacer element. The third spacer element is located between the third lens and the fourth lens and at least partially contacts the image side surface of the third lens. The outer diameter D3m of the image side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, and the effective focal length f4 of the fourth lens satisfy: -2.00 < (D3m - d3m) / f4 < -1.60. By constraining (D3m - d3m) / f4 within a reasonable range, the width of the third spacer element can be constrained, ensuring the contact area between the third spacer element and the fourth lens to ensure the stability of the fourth lens assembly. At the same time, by ensuring the width of the third spacer element, the third spacer element can absorb stray light and weaken the energy of the stray light. By constraining the relationship between the width of the third spacer element and the focal length of the fourth lens, the deflection angle of the light in the fourth lens can be controlled, so that some of the light is reflected to the third spacer element for absorption after passing through the fourth lens, reducing the risk of stray light generated by the light passing through the fourth lens.

[0068] In some alternative embodiments, the spacer element group further includes a third spacer element and a fourth spacer element. The third spacer element is located between the third lens and the fourth lens and is at least partially in contact with the image side surface of the third lens. The fourth spacer element is located between the fourth lens and the fifth lens and is at least partially in contact with the image side surface of the fourth lens. The inner diameter d4s of the object side surface of the fourth spacer element, the inner diameter d3s of the object side surface of the third spacer element, and the central thickness CT4 of the fourth lens satisfy: 1.16 < (d4s - d3s) / CT4 < 2.10. By constraining (d4s - d3s) / CT4 within a reasonable range, the inner diameters of the third spacer element and the fourth spacer element can be constrained, so as to constrain the beam range of the imaging light before entering the fourth lens and after exiting the fourth lens, and the deflection angle of the light when passing through the fourth lens can be constrained, reducing the optical sensitivity of the fourth lens. At the same time, limiting the central thickness of the fourth lens ensures that the change in the resolution power of the optical lens before and after the high-temperature and high-humidity reliability test meets the test requirements.

[0069] In some alternative embodiments, the spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is at least partially in contact with the image side surface of the fifth lens. The inner diameter d0m of the image side end surface of the lens barrel, the fifth spacer element d5m, and the combined focal length f45 of the fourth lens and the fifth lens satisfy: -1.34 < (d0m - d5m) / f45 < -0.61. By constraining (d0m - d5m) / f45 within a reasonable range, it helps to improve the back-end stray light reflection of the lens barrel, ensure the adaptability of the chip image plane size to the lens, and at the same time limiting f45 helps to improve the axial dimensions of the fourth lens and the fifth lens, ensuring the light transmission path.

[0070] In some alternative embodiments, the fifth lens has a positive optical power. The spacer element group further includes a fifth spacer element. The fifth spacer element is located between the fifth lens and the sixth lens and is at least partially in contact with the image side surface of the fifth lens. The inner diameter d5m of the image side surface of the fifth spacer element and the effective focal length f5 of the fifth lens satisfy: 2.31 < f5 / d5m < 2.80. By constraining f5 / d5m within a reasonable range, by constraining the relationship between the inner diameter of the fifth spacer element and the effective focal length of the fifth lens, the fifth spacer element intercepts the stray light generated at the flange position of the fourth lens, preventing the generation of a stray light path with relatively high energy. At the same time, limiting the effective focal length of the fifth lens can ensure the convergence of light on the imaging plane, thereby ensuring the clarity of the lens imaging.

[0071] According to another aspect of the present invention, there is provided an optical lens, comprising a lens barrel, a lens group and a spacer element group disposed 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 direction. 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 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 at least partially in contact with the image side surface of the first lens; the following relationship is satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00; the following relationship is satisfied between 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 effective focal length f of the optical lens: 1.25 < (D1s - d1s) / f < 2.65.

[0072] The optical lens of the present application is composed of a lens barrel, six lenses and at least one spacer element. When the object side surface of the first lens is convex, the image side surface of the first lens is concave, and the following relationship is satisfied between the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens: 5.10 < R1 / R2 ≤ 13.00, the bending degree difference between the object side surface and the image side surface of the first lens is large, and the bending degree of the image side surface of the first lens is large, which easily causes the stress borne by the first lens to be concentrated in the optical structure area of the first lens, and then easily causes the first lens to be deformed, and slight edge breakage, cracks, etc. are generated in the optical structure area of the first lens, affecting the appearance of the optical lens, and may also cause the crack to extend to the optical effective area, affecting the optical performance. In order to reduce the problem of deformation of the first lens, the present application can ensure the width of the first spacer element by restricting (D1s - d1s) / f within a reasonable range, and then ensure the bearing range between the first spacer element and the first lens, while ensuring the assembly stability, disperse the bearing stress between the first lens and the first spacer element, and reduce the risk of deformation of the first lens caused by stress concentration. While ensuring the bearing stability of the first lens, it can absorb the stray light at the position of the optical structure area between the first lens and the second lens, which is beneficial to improving the imaging quality of the optical lens. At the same time, restricting the relationship between the size of the first spacer element and the effective focal length of the optical lens is beneficial to restricting the size of the lens barrel, avoiding the mismatch between the size of the lens barrel and the focal length of the optical system, and is beneficial to improving the assembly stability of the optical lens.

[0073] According to another aspect of the present invention, an optical lens is provided, which 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 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 direction. 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 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 at least partially in contact with the image side surface of the first lens; the outer diameter D0s of the object side end surface of the lens barrel and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.75 < D0s / d1s < 4.59, and the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.55 < R1×N1 / (D1s - d1s) < 8.35.

[0074] The optical lens of the present application is composed of a lens barrel, six lenses and at least one spacer element. The outer diameter D0s of the object side end surface of the lens barrel and the inner diameter d1s of the object side surface of the first spacer element satisfy: 2.75 < D0s / d1s < 4.59, which makes the difference between the object side opening of the lens barrel and the light passing aperture of the first spacer element relatively large. When marginal rays enter the optical system, they need to be quickly converged to enter the optical system. When the marginal rays enter the first lens, the angle between them and the optical axis is relatively large, which easily causes some large-angle rays to deflect to the optical structure area of the first lens and form stray light, affecting the imaging quality. In order to reduce this part of the stray light, the present application constrains R1×N1 / (D1s - d1s) within a reasonable range, which can constrain the deflection angle of the rays entering the object side surface of the first lens, so as to facilitate the rapid convergence of the rays through the inner diameter of the first spacer element. At the same time, the width of the first spacer element is constrained to absorb the large-angle deflected rays, further reducing the generation of stray light. If R1×N1 / (D1s - d1s) is less than 2.55, it will cause the bending degree of the object side surface of the first lens to be relatively large, which is not conducive to the convergence of large-angle rays, and the large-angle rays are easily deflected to the optical structure area, affecting the imaging quality. If R1×N1 / (D1s - d1s) is greater than 8.35, it will cause the bending degree of the object side surface of the first lens to be relatively small, and the convergence range of the rays is relatively small, resulting in some rays being absorbed by the first spacer element, resulting in a decrease in the light flux and affecting the imaging quality.

[0075] Of course, other parametric expressions in the above embodiments may also be included in this embodiment, which will not be elaborated here one by one.

[0076] Optionally, the above optical lens may further include a filter located on the object side of the imaging surface.

[0077] Optionally, the above optical lens may further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0078] It should be noted that each lens is composed of an optically effective diameter region located at the center and a structural region located at the edge. The structural region is located on the outer peripheral side of the optically effective 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 structural region is not used for the passage of imaging light and is used to abut against the lens barrel, adjacent lens, or adjacent spacer element. The structural region is also referred to as the non-effective diameter region.

[0079] The optical lens in the present application can 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 continuously changes from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality.

[0080] 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 lens can be changed to obtain the various results and advantages described in this specification. For example, although the six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may further include other numbers of lenses.

[0081] Figure 1 Fig. shows a schematic diagram of the dimension marking of an optical lens of the present application. Figure 1 Parameters such as d1s, D1s, d2s, D2s, d3s, d3m, D2m, d4s, d5m, d0m, D0s, EP01, EP12, EP23, etc. are marked in it to clearly and intuitively understand the meaning of the parameters. For the convenience of describing the surface shape of the optical lens and specific lenses, these parameters will no longer be shown in the drawings when specific embodiments are described later.

[0082] Next, with reference to the accompanying drawings, specific examples of the surface shape and parameters of the optical lens applicable to the above embodiments will be further described.

[0083] It should be noted that in the following First Embodiment, there are Embodiment 1-1, Embodiment 1-2, and Embodiment 1-3; in the Second Embodiment, there are Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3; and in the Third Embodiment, there are Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3. The parameters such as the radius of curvature and the central thickness of the first lens to the sixth lens of the optical lens, the spacing distance between the lenses, and the high-order term coefficients are the same under the three embodiments in the same embodiment. However, 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.

[0084] It should be noted that any of the following First Embodiment to Third Embodiment is applicable to all embodiments of the present application.

[0085] First Embodiment

[0086] As Figures 2 to 7 shown, the optical lens of the First Embodiment is described. Figure 2 FIG. shows the structural schematic diagram of the optical lens of Embodiment 1-1, Figure 3 FIG. shows the structural schematic diagram of the optical lens of Embodiment 1-2, Figure 4 FIG. shows the structural schematic diagram of the optical lens of Embodiment 1-3.

[0087] As Figures 2 to 4 shown, the optical lens includes a lens barrel, 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.

[0088] As Figure 2 shown, it is the structural schematic diagram of the optical lens of Embodiment 1-1. In this example, 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 and the image side surface of the fifth spacer element are in partial contact with the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens respectively. The image side surface S12 of the sixth lens is in partial contact with the lens barrel.

[0089] As Figure 3 shown, it is a schematic structural diagram of the optical lens of Embodiment 1-2. In this example, the abutting and contacting manners of each spacer element are the same as those in Embodiment 1-1, and the relevant descriptions in Embodiment 1-1 can be referred to, which will not be elaborated here.

[0090] As Figure 4 shown, it is a schematic structural diagram of the optical lens of Embodiment 1-3. In this example, the object side S1 of the first lens contacts the lens barrel part, and the image side S12 of the sixth lens is spaced from the lens barrel. The abutting and contacting manners of the other spacer elements are the same as those in Embodiment 1-1, and the relevant descriptions in Embodiment 1-1 can be referred to, which will not be elaborated here.

[0091] In summary, the structural parameters of the optical lens of Embodiment 1 under Embodiments 1-1, 1-2, and 1-3 are shown in Table 9.

[0092] 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 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 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. In Table 2 below, OBJ is the object surface of the optical lens, and STO is the aperture stop, and the aperture stop is located between the second lens and the third lens.

[0093] Table 2 shows the basic structural parameter table of the optical lens of Embodiment 1, where the units of the radius of curvature and the thickness / distance are both millimeters (mm).

[0094]

[0095] Table 2

[0096] In Embodiment 1, the object sides and image sides of the first lens E1 to the sixth lens E6 are all aspherical surfaces, and the surface profiles of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0097]

[0098] Wherein, x is the sagitta, which is the distance from the vertex of the aspherical surface to the position along the optical axis at 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 constant; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16 for each of the aspherical mirrors S1 - S12 in Example 1.

[0099]

[0100]

[0101] Table 3

[0102] Figure 5 shows the axial chromatic aberration curve of the optical lens in Example 1, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical lens. Figure 6 shows the astigmatism curve of the optical lens in Example 1, which represents the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 7 shows the longitudinal chromatic aberration curve of the optical lens in Example 1, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0103] According to Figures 5 to 7 it can be seen that the optical lens given in Example 1 can achieve good imaging quality.

[0104] Example 2

[0105] As Figures 8 to 13 shown, the optical lens of Example 2 is described. Figure 8 shows the structural schematic diagram of the optical lens of Example 2 - 1, Figure 9 shows the structural schematic diagram of the optical lens of Example 2 - 2, Figure 10 shows the structural schematic diagram of the optical lens of Example 2 - 3.

[0106] As Figures 8 to 10 shown, the optical lens includes a lens barrel, 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.

[0107] As Figure 8As shown in the figure, it is a schematic structural diagram of the optical lens of Embodiment 2-1. In this example, 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 P1 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 S5 of the third lens respectively. 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 object side and the image side of the fifth spacer element are in partial contact with the image side S10 of the fifth lens and the object side S11 of the sixth lens respectively. The image side S12 of the sixth lens is in partial contact with the lens barrel.

[0108] As Figure 9 shown in the figure, it is a schematic structural diagram of the optical lens of Embodiment 2-2. In this example, the abutting and contacting methods of each spacer element are the same as those in Embodiment 2-1. For relevant descriptions, reference can be made to those in Embodiment 2-1, and details will not be elaborated here.

[0109] As Figure 10 shown in the figure, it is a schematic structural diagram of the optical lens of Embodiment 2-3. In this example, the object side S1 of the first lens is in partial contact with the lens barrel, and the image side S12 of the sixth lens is spaced from the lens barrel. The abutting and contacting methods of the other spacer elements are the same as those in Embodiment 2-1. For relevant descriptions, reference can be made to those in Embodiment 2-1, and details will not be elaborated here.

[0110] In summary, the structural parameters of the optical lens in Embodiment 2 under Embodiment 2-1, Embodiment 2-2, and Embodiment 2-3 are shown in Table 9.

[0111] 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 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. In Table 4 below, OBJ is the object surface of the optical lens, and STO is the aperture stop. The aperture stop is located between the second lens and the third lens.

[0112] Table 4 shows the basic structural parameter table of the optical lens in Embodiment 2, where the unit of the radius of curvature and the thickness / distance is millimeter (mm).

[0113]

[0114] Table 4

[0115] The following Table 5 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 for each aspherical mirror surface S1 - S12 in Embodiment 2. Among them, each aspherical surface type can be defined by the formula (1) given in the above Embodiment 1.

[0116] Surface profile A4 A6 A8 A10 A12 A14 A16 S3 2.2130E-03 -8.5836E-03 1.2561E-03 1.8685E-04 -2.4495E-04 7.8872E-05 -7.3726E-06 S4 -1.2823E-02 -2.5274E-03 2.1765E-02 -2.6387E-02 1.8288E-02 -6.6017E-03 1.0025E-03 S5 -2.2190E-02 -1.1461E-02 2.3248E-02 -3.8908E-02 3.3623E-02 -1.5506E-02 2.7139E-03 S6 1.2591E-02 -2.3162E-01 4.1106E-01 -4.1093E-01 2.4570E-01 -8.2042E-02 1.1680E-02 S7 -3.0062E-02 -1.4697E-01 2.6241E-01 -2.3337E-01 1.2175E-01 -3.6439E-02 4.9257E-03 S8 1.9853E-02 -2.2191E-02 2.6152E-02 -8.8171E-03 -2.0187E-03 1.8384E-03 -2.7164E-04 S9 -4.4593E-02 4.0109E-02 -2.7932E-02 1.2576E-02 -2.9239E-03 1.2323E-04 2.9692E-05 S10 -2.7866E-02 2.0653E-02 -9.6624E-03 4.7083E-03 -1.8271E-03 4.6840E-04 -5.7363E-05 S11 -7.8684E-02 1.0690E-02 -1.4902E-03 2.9454E-04 -9.2899E-05 2.1881E-05 -1.8319E-06 S12 -6.3513E-02 1.3769E-02 -2.4544E-03 3.0271E-04 -2.4002E-05 1.0800E-06 -2.0867E-08

[0117] Table 5

[0118] Figure 11 shows the axial chromatic aberration curve of the optical lens in Embodiment 2, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical lens. Figure 12 shows the astigmatism curve of the optical lens in Embodiment 2, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 13 shows the longitudinal chromatic aberration curve of the optical lens in Embodiment 2, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0119] According to Figures 11 to 13 it can be known that the optical lens given in Embodiment 2 can achieve good imaging quality.

[0120] Embodiment 3

[0121] As Figures 14 to 19 shown, the optical lens in Embodiment 3 is described. Figure 14 shows the structural schematic diagram of the optical lens in Embodiment 3 - 1, Figure 15 shows the structural schematic diagram of the optical lens in Embodiment 3 - 2, Figure 16 shows the structural schematic diagram of the optical lens in Embodiment 3 - 3.

[0122] As Figures 14 to 16 shown, the optical lens includes a lens barrel, 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.

[0123] As Figure 14As shown, it is a schematic structural diagram of the optical lens of Embodiment 3-1. In this example, 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 P1 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 S5 of the third lens, respectively. 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 object side and the image side of the fifth spacer element are in partial contact with the image side S10 of the fifth lens and the object side S11 of the sixth lens, respectively. The image side S12 of the sixth lens is in partial contact with the lens barrel.

[0124] As Figure 15 shown, it is a schematic structural diagram of the optical lens of Embodiment 3-2. In this example, the bearing and abutting manners of each spacer element are the same as those in Embodiment 3-1, and reference can be made to the relevant descriptions in Embodiment 3-1, which will not be elaborated here.

[0125] As Figure 16 shown, it is a schematic structural diagram of the optical lens of Embodiment 3-3. In this example, the object side S1 of the first lens is in partial contact with the lens barrel, and the image side S12 of the sixth lens is spaced from the lens barrel. The bearing and abutting manners of the other spacer elements are the same as those in Embodiment 3-1, and reference can be made to the relevant descriptions in Embodiment 3-1, which will not be elaborated here.

[0126] In summary, the structural parameters of the optical lens in Embodiment 3 under Embodiment 3-1, Embodiment 3-2, and Embodiment 3-3 are shown in Table 9.

[0127] 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 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 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. OBJ in Table 6 below is the object surface of the optical lens, and STO is the aperture stop, and the aperture stop is located between the second lens and the third lens.

[0128] Table 6 shows the basic structural parameter table of the optical lens of Embodiment 3, where the unit of the radius of curvature and the thickness / distance is millimeter (mm).

[0129]

[0130] Table 6

[0131] The following Table 7 gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 for each aspherical mirror surface S1 - S12 in Embodiment 3. Among them, each aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.

[0132] Surface profile A4 A6 A8 A10 A12 A14 A16 S3 -2.6313E-03 -1.1283E-03 -1.9882E-03 1.8437E-03 -8.3948E-04 2.0146E-04 -1.9610E-05 S4 1.9127E-03 -3.0235E-02 8.8286E-02 -1.3604E-01 1.2274E-01 -5.8139E-02 1.1024E-02 S5 -3.7970E-03 -4.4936E-02 1.0242E-01 -1.8770E-01 1.9676E-01 -1.1349E-01 2.5334E-02 S6 3.1751E-02 -2.6639E-01 4.6340E-01 -5.0039E-01 3.0856E-01 -9.3929E-02 8.5671E-03 S7 -2.4325E-02 -1.1231E-01 1.4993E-01 -6.4474E-02 -6.3886E-02 7.9298E-02 -2.3179E-02 S8 -7.5437E-03 7.1491E-02 -1.3220E-01 1.6653E-01 -1.2797E-01 5.2910E-02 -8.7414E-03 S9 -4.0608E-02 4.8887E-02 -6.1452E-02 6.2186E-02 -3.8095E-02 1.2619E-02 -1.9202E-03 S10 -2.8294E-02 1.5220E-02 4.2963E-03 -1.2251E-02 9.4389E-03 -2.9167E-03 2.9894E-04 S11 -9.9469E-02 1.7285E-02 -8.8644E-03 6.3957E-03 -3.0296E-03 7.1608E-04 -6.2175E-05 S12 -7.4520E-02 1.9119E-02 -3.9407E-03 5.5841E-04 -5.1677E-05 2.7648E-06 -6.3830E-08

[0133] Table 7

[0134] Figure 17 shows the axial chromatic aberration curve of the optical lens of Embodiment 3, which represents the deviation of the convergence points of light rays with different wavelengths after passing through the optical lens. Figure 18 shows the astigmatism curve of the optical lens of Embodiment 3, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 19 shows the longitudinal chromatic aberration curve of the optical lens of Embodiment 3, which represents the deviation of different image heights of light rays on the imaging plane after passing through the lens.

[0135] According to Figures 17 to 19 it can be known that the optical lens given in Embodiment 3 can achieve good imaging quality.

[0136] In summary, the optical lenses of Embodiments 1 to 3 respectively satisfy the relationships shown in Table 8.

[0137] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 R1 / R2 13.00 13.00 13.00 5.60 5.60 5.60 5.13 5.13 5.13 D1s / DT11 3.30 3.65 2.53 3.49 2.95 2.72 2.87 2.54 2.73 D1s / f1 -2.72 -3.00 -2.08 -3.33 -2.83 -2.60 -2.49 -2.20 -2.37 f12 / R4×(EP12 / T12) -8.68 -8.68 -8.65 -9.93 -10.09 -9.92 -6.23 -5.00 -5.58 EP01 / SAG11 8.12 9.30 5.83 5.65 5.48 5.05 4.52 4.80 5.11 (D3m - d3m) / f4 -1.80 -1.69 -1.62 -1.88 -1.65 -1.91 -1.81 -1.71 -1.96 f2 / R4×(D2s / d2s) -4.49 -4.28 -3.99 -3.83 -3.45 -3.77 -3.16 -3.01 -3.25 (T23 + CT3 + T34) / EP23 1.45 1.46 1.48 1.73 1.72 1.71 1.44 1.41 1.39 EP12 / CT2 1.10 1.10 1.09 1.20 1.22 1.20 1.19 0.95 1.06 f5 / d5m 2.76 2.36 2.76 2.42 2.65 2.36 2.56 2.60 2.48 (D1s - d1s) / f 2.26 2.60 1.48 2.48 1.93 1.70 1.74 1.27 1.69 (d0m - d5m) / f45 -0.74 -0.68 -0.93 -0.73 -0.69 -1.06 -0.71 -0.76 -1.29 (d4s - d3s) / CT4 2.06 1.97 1.99 1.23 1.21 1.27 1.44 1.38 1.51 D0s / d1s 3.94 4.54 2.95 4.25 3.77 3.35 3.21 3.12 2.80

[0138] Table 8 Table 9 shows some parameters (unit: mm) of the optical lenses of Embodiments 1 to 3.

[0139]

[0140]

[0141] Table 9

[0142] This application also provides an imaging device, and its electronic photosensitive element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor 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 lens described above.

[0143] Obviously, the embodiments described above are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0144] It should be noted that the terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and / or combinations thereof.

[0145] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings 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.

[0146] 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 changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical 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 a 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 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 at least partial contact with the image side surface of the first lens; The curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 5.10 <R1 / R2≤13.00; The outer diameter D1s of the object side surface of the first spacer element and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 2.50 <D1s / DT11<3.70。 2. The optical lens according to claim 1, characterized in that: The outer diameter D1s of the object side of the first spacer element satisfies the effective focal length f1 of the first lens: -3.38 <D1s / f1<-2.03。 3. The optical lens according to claim 1, characterized in that: The spacing distance EP01 between the object side end face of the lens barrel and the object side face of the first spacing element in the direction of the optical axis, and the on-axis distance SAG11 between the intersection of the object side face of the first lens and the optical axis to the effective radius vertex of the object side face of the first lens satisfy: 4.50 <EP01 / SAG11<9.35。 4. The optical lens according to claim 1, characterized in that: An outer diameter D1s of the object side surface of the first spacing element, an inner diameter d1s of the object side surface of the first spacing element, and an effective focal length f of the optical lens satisfy the following: 1.25<(D1s-d1s) / f<2.

65.

5. The optical lens according to claim 1, characterized in that: The outer diameter D0s of the object side end surface of the lens barrel and the inner diameter d1s of the object side surface of the first spacing element satisfy the following relationship: 2.75 <D0s / d1s<4.59。 6. The optical lens according to claim 1, characterized in that: The image side surface of the second lens is a convex surface, the spacer element group further includes a second spacer element, the second spacer element is located between the second lens and the third lens and is in at least partial contact with the image side surface of the second lens, and the combined focal length f12 of the first lens and the second lens, the curvature radius R4 of the image side surface of the second lens, the air gap T12 between the first lens and the second lens on the optical axis, and the spacing distance EP12 between the first spacer element and the second spacer element in the optical axis direction satisfy: -10.15 <f12 / R4×(EP12 / T12)<-4.95。 7. The optical lens according to claim 1, characterized in that: The spacer element group further includes a second spacer element, which is located between the second lens and the third lens and at least partially contacts the image side surface of the second lens, and the spacing distance EP12 between the first spacer element and the second spacer element in the optical axis direction and the center thickness CT2 of the second lens satisfy: 0.90 <EP12 / CT2<1.25。 8. The optical lens according to claim 1, characterized in that: The second lens has positive focal power, the image side surface of the second lens is a convex surface, the spacer element group further includes a second spacer element, the second spacer element is located between the second lens and the third lens and is in at least partial contact with the image side surface of the second lens, and the inner diameter d2s of the object side surface of the second spacer element, the outer diameter D2s of the object side surface of the second spacer element, the effective focal length f2 of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: -4.55 <f2 / R4×(D2s / d2s)<-2.96。 9. The optical lens according to any one of claims 1 to 8, 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 and is at least partially in contact with the image side surface of the second lens, the third spacer element is located between the third lens and the fourth lens and is at least partially in contact with the image side surface of the third lens, and the air gap T23 between the second lens and the third lens on the optical axis, the air gap T34 between the third lens and the third lens on the optical axis, the center thickness CT3 of the third lens, and the spacing distance EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy the following: 1.35<(T23+CT3+T34) / EP23<1.

75.

10. The optical lens according to any one of claims 1 to 8, characterized in that: The fourth lens has negative optical power, and the spacer element group also includes a third spacer element, which is located between the third lens and the fourth lens and is at least partially in contact with the image side surface of the third lens, and the outer diameter D3m of the image side surface of the third spacer element, the inner diameter d3m of the image side surface of the third spacer element, and the effective focal length f4 of the fourth lens satisfy: -2.00<(D3m-d3m) / f4<-1.60.

Images