Zoom lens compensation group

Abstract

The utility model provides a zoom lens compensation group, the number of lenses with focal power is five, the zoom lens compensation group comprises a lens group, a spacing element group and a lens barrel, and the lens group and the spacing element group are accommodated in the lens barrel; wherein the air interval T12 between the first lens and the second lens on the optical axis of the zoom lens compensation group and the air interval T23 between the second lens and the third lens on the optical axis meet the condition that T12 / T23 is greater than or equal to 12.10 and less than or equal to 14.81; the effective focal length f2 of the second lens, the interval EP12 between the first spacing element and the second spacing element along the optical axis direction, and the air interval T12 between the first lens and the second lens on the optical axis satisfy the following condition: 5.99 < = f2 / (EP12-T12) < = 6.63. The zoom lens compensation group solves the problem that the assembling stability and high image quality of the zoom lens compensation group in the prior art cannot be considered at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical imaging device technical field, specifically, relate to a zoom lens compensation group. BACKGROUND

[0002] With the continuous improvement of mobile device photography function, the user puts forward higher requirement to the performance of mobile phone lens, and these requirements include but are not limited to long focal length, large aperture and multiple zoom characteristics, to realize the imaging effect of professional camera level.In zoom lens, compensation group is the lens combination in the middle position of zoom lens after fixed group.Compensation group is composed of a group of lenses that can move forward or backward to adjust position, and the main function is to compensate focal length, so that light can be correctly focused on the imaging surface.Through moving the position of compensation group, the focal length of zoom lens can be adjusted, and the close-range or long-distance shooting effect can be realized.However, when the light passes through the front end of zoom lens compensation group, the path is difficult to control, the height variation of light is large, the control difficulty of field curvature and chromatic aberration is increased, and stray light and imaging quality are also caused to decline.At the same time, the interval between front-end lenses is unreasonable, which also makes the stability in the process of assembly poor, and leads to the increase of reliability variation risk.Therefore, how to control the optical parameters of the front-end lens of zoom lens compensation group, reduce aberration and improve image quality under the premise of ensuring assembly stability is a very important problem. SUMMARY

[0003] The main purpose of the utility model is to provide a zoom lens compensation group, to solve the problem that the assembly stability and high image quality of zoom lens compensation group in the prior art cannot be considered.

[0004] In order to achieve the above object, according to one aspect of the present application, a zoom lens compensation group is provided, the number of lenses with optical power of the zoom lens compensation group is five, the zoom lens compensation group comprises: a lens group, the lens group comprises first to fifth lenses arranged in sequence and spaced from each other from the object side to the image side of the zoom lens compensation group; a spacer element group, the spacer element group at least comprises a first spacer element located between the first lens and the second lens and at least partially in contact with the image side of the first lens, a second spacer element located between the second lens and the third lens and at least partially in contact with the image side of the second lens, a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens; a lens barrel, the lens group and the spacer element group are accommodated in the lens barrel; wherein the air gap T12 of the first lens and the second lens on the optical axis of the zoom lens compensation group, and the air gap T23 of the second lens and the third lens on the optical axis satisfy: 12.10<=T12 / T23<=14.81; the effective focal length f2 of the second lens, the interval EP12 of the first spacer element and the second spacer element along the optical axis direction, and the air gap T12 of the first lens and the second lens on the optical axis satisfy: 5.99<=f2 / (EP12-T12)<=6.63.

[0005] According to another aspect of the present application, a zoom lens compensation group is also provided, the number of lenses with optical power of the zoom lens compensation group is five, the zoom lens compensation group comprises: a lens group, the lens group comprises first to fifth lenses arranged in sequence and spaced from each other from the object side to the image side of the zoom lens compensation group; a spacer element group, the spacer element group at least comprises a first spacer element located between the first lens and the second lens and at least partially in contact with the image side of the first lens, a second spacer element located between the second lens and the third lens and at least partially in contact with the image side of the second lens, a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side of the fourth lens; a lens barrel, the lens group and the spacer element group are accommodated in the lens barrel; wherein the effective focal length f3 of the third lens, the center thickness CT3 of the third lens, the refractive index N3 of the third lens, and the interval EP23 of the second spacer element and the third spacer element along the optical axis direction satisfy: -4.94<=(f3*CT3*N3) / EP23<=-4.21; the interval EP34 of the third spacer element and the fourth spacer element along the optical axis direction, the maximum thickness CP4 of the fourth spacer element, and the center thickness CT4 of the fourth lens satisfy: 2.36<=EP34 / (CT4+CP4)<=2.71.

[0006] According to the utility model, the effective focal length f3 of the third lens, the interval EP23 of the second interval element and the third interval element along the optical axis direction, and the air interval T23 of the second lens and the third lens on the optical axis satisfy the following formula: -0.40 <= f3 / (EP23-T23) <= -0.21.

[0007] Further, the outer diameter D0m of the image side end surface of the lens barrel, the inner diameter d0m of the image side end surface of the lens barrel, the outer diameter D0s of the object side end surface of the lens barrel, and the inner diameter d0s of the object side end surface of the lens barrel satisfy the following formula: 3.63 <= (D0m-d0m) / (D0s-d0s) <= 5.99.

[0008] Further, the effective focal length f1 of the first lens, the central thickness CT1 of the first lens, and the interval EP01 of the object side end surface of the lens barrel and the first interval element along the optical axis direction satisfy the following formula: 14.22 <= f1 / CT1+f1 / EP01 <= 22.55.

[0009] Further, the air interval T23 of the second lens and the third lens on the optical axis and the maximum thickness CP2 of the second interval element satisfy the following formula: 8.99 <= T23 / CP2 <= 12.11.

[0010] Further, the effective focal length f3 of the third lens, the central thickness CT3 of the third lens, the refractive index N3 of the third lens, and the interval EP23 of the second interval element and the third interval element along the optical axis direction satisfy the following formula: -4.94 <= (f3*CT3*N3) / EP23 <= -4.21.

[0011] Further, the effective focal length f4 of the fourth lens and the interval EP34 of the third interval element and the fourth interval element along the optical axis direction satisfy the following formula: 3.11 <= f4 / EP34 <= 3.52.

[0012] Further, the interval EP34 of the third and fourth interval elements in the optical axis direction, the maximum thickness CP4 of the fourth interval element, and the central thickness CT4 of the fourth lens satisfy: 2.36 ≤ EP34 / (CT4+CP4) ≤ 2.71.

[0013] Further, the radius of curvature R2 of the image side surface of the first lens, the outer diameter D1s of the object side surface of the first interval element, and the inner diameter d1s of the object side surface of the first interval element satisfy: -47.70 ≤ R2 / (D1s-d1s) ≤ -25.60.

[0014] Further, the radius of curvature R4 of the image side surface of the second lens, the outer diameter D2s of the object side surface of the second interval element, and the inner diameter d2s of the object side surface of the second interval element satisfy: 12.52 ≤ R4 / (D2s-d2s) ≤ 17.05.

[0015] Further, the outer diameter D2m of the image side surface of the second interval element, the outer diameter D3s of the object side surface of the third interval element, and the radius of curvature R5 of the object side surface of the third lens satisfy: -3.84 ≤ R5 / (D2m+D3s) ≤ -2.39.

[0016] Further, the radius of curvature R6 of the image side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D3m of the image side surface of the third interval element, and the inner diameter d3m of the image side surface of the third interval element satisfy: 2.10 ≤ R6*N3 / (D3m-d3m) ≤ 3.06.

[0017] Further, the effective focal length f5 of the fifth lens, the central thickness CT5 of the fifth lens, the outer diameter D0m of the image side end surface of the barrel, and the inner diameter d0m of the image side end surface of the barrel satisfy: -13.97 ≤ (f5 / CT5)*(D0m / d0m) ≤ -12.66.

[0018] Further, the radius of curvature R8 of the image side surface of the fourth lens, the outer diameter D4s of the object side surface of the fourth interval element, and the inner diameter d4s of the object side surface of the fourth interval element satisfy: -5.79 ≤ R8 / (D4s-d4s) ≤ -3.94.

[0019] Further, the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power.

[0020] Further, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a convex surface, the object side surface of the second lens is a convex surface, the image side surface of the second lens is a concave surface, the object side surface of the third lens is a concave surface, the image side surface of the third lens is a concave surface, the object side surface of the fourth lens is a convex surface, the image side surface of the fourth lens is a convex surface; the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a concave surface.

[0021] By applying the technical scheme of the utility model, the zoom lens compensation group has five lenses with optical power, the zoom lens compensation group comprises a lens group, a spacer element group and a lens barrel, the lens group comprises first to fifth lenses arranged in sequence and spaced from each other from the object side to the image side of the zoom lens compensation group; the spacer element group comprises at least a first spacer element located between the first lens and the second lens and at least partially in contact with the image side surface of the first lens, a second spacer element located between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, a third spacer element located between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens; the lens group and the spacer element group are accommodated in the lens barrel; wherein the air gap T12 between the first lens and the second lens on the optical axis of the zoom lens compensation group and the air gap T23 between the second lens and the third lens satisfy the condition: 12.10 <= T12 / T23 <= 14.81; the effective focal length f2 of the second lens, the interval EP12 of the first spacer element and the second spacer element along the optical axis direction, and the air gap T12 of the first lens and the second lens on the optical axis satisfy the condition: 5.99 <= f2 / (EP12-T12) <= 6.63.

[0022] The zoom lens compensation group uses five lenses with optical power, and the first to fifth lenses are arranged in sequence and spaced from each other. By controlling the focal length of the front lens and the interval between different lenses or spacer elements, the height of the light in the zoom lens compensation group is reasonably controlled, the path of the light inside the zoom lens compensation is effectively managed, and it is ensured that the light will not be excessively or insufficiently converged when entering the subsequent lens, thereby reducing the field curvature and chromatic aberration and improving the imaging quality of the zoom lens compensation. While ensuring the optical performance of the zoom lens compensation group, the assembly stability of the lens is also improved, and the reliability variation risk is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application. The use of the same reference numerals in different drawings indicates similar or identical components.

[0024] Figure 1The partial parameter schematic view of the zoom lens compensation group of any optional embodiment of the utility model is shown;

[0025] Figure 2 The structural schematic view of the zoom lens compensation group of embodiment one of the utility model is shown;

[0026] Figure 3 The structural schematic view of the zoom lens compensation group of embodiment two of the utility model is shown;

[0027] Figure 4 The structural schematic view of the zoom lens compensation group of embodiment three of the utility model is shown;

[0028] Figure 5 The structural schematic view of the zoom lens compensation group of embodiment four of the utility model is shown;

[0029] Figure 6 The structural schematic view of the zoom lens compensation group of embodiment five of the utility model is shown;

[0030] Figure 7 The structural schematic view of the zoom lens compensation group of embodiment six of the utility model is shown;

[0031] Figure 8 The structural schematic view of the zoom lens compensation group of embodiment seven of the utility model is shown;

[0032] Figure 9 The structural schematic view of the zoom lens compensation group of embodiment eight of the utility model is shown;

[0033] Figure 10 The structural schematic view of the zoom lens compensation group of embodiment nine of the utility model is shown;

[0034] Figure 11 The structural schematic view of the zoom lens compensation group of embodiment ten of the utility model is shown;

[0035] Figure 12 The structural schematic view of the zoom lens compensation group of embodiment eleven of the utility model is shown;

[0036] Figure 13 The structural schematic view of the zoom lens compensation group of embodiment twelve of the utility model is shown;

[0037] Figure 14 The displacement nephogram before the zoom lens compensation group of any optional embodiment of the utility model is shown;

[0038] Figure 15 The displacement nephogram after the zoom lens compensation group of any optional embodiment of the utility model is shown;

[0039] Figure 16 A stress cloud map of the zoom lens compensation group before being pressed according to any optional embodiment of the utility model is shown;

[0040] Figure 17 A stress cloud map of the zoom lens compensation group after being pressed according to any optional embodiment of the utility model is shown.

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

[0042] P0, lens barrel; E1, first lens; P1, first spacer element; E2, second lens; P2, second spacer element; E3, third lens; P3, third spacer element; E4, fourth lens; P4, fourth spacer element; E5, fifth lens; S1, object side surface of the first lens; S2, image side surface of the first lens; S3, object side surface of the second lens; S4, image side surface of the second lens; S5, object side surface of the third lens; S6, image side surface of the third lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens. DETAILED DESCRIPTION

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

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0045] It should be noted that, in the present specification, the expressions first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0046] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for ease of illustration. Specifically, the shape of the spherical surface or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical surface or aspherical surface is not limited to the shape of the spherical surface or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0047] In this context, the paraxial region refers to a 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 the person skilled in the art, that is, the convexity or concavity is judged by the positive or negative of the R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software). For the object side surface, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the display side surface, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0048] In the utility model, in the case that no opposite statement is made, the orientation words such as ''upper, lower, top, bottom'' used are usually for the direction shown in the drawings or for the component itself in the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, ''inner, outer'' refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0049] In order to solve the problem that the existing technology cannot balance the assembly stability and high image quality of the zoom lens compensation group under the premise of maintaining high performance, the utility model provides a zoom lens compensation group.

[0050] First embodiment

[0051] As shown in Figures 1 to 17 The zoom lens compensation group has five pieces of lenses with optical power, and the zoom lens compensation group includes a lens group, a spacer element group and a lens barrel. From the object side to the image side of the zoom lens compensation group, the lens group includes first to fifth lenses arranged in sequence. The spacer element group includes at least a first spacer element located between the first and second lenses and at least partially contacting the image side of the first lens, a second spacer element located between the second and third lenses and at least partially contacting the image side of the second lens, a third spacer element located between the third and fourth lenses and at least partially contacting the image side of the third lens, and a fourth spacer element located between the fourth and fifth lenses and at least partially contacting the image side of the fourth lens. The lens group and the spacer element group are accommodated in the lens barrel. The air gap T12 between the first and second lenses on the optical axis of the zoom lens compensation group and the air gap T23 between the second and third lenses satisfy the condition: 12.10≤T12 / T23≤14.81. The effective focal length f2 of the second lens, the interval EP12 of the first and second spacer elements along the optical axis, and the air gap T12 between the first and second lenses satisfy the condition: 5.99≤f2 / (EP12-T12)≤6.63.

[0052] The zoom lens compensation group of the present application uses five lenses with optical power, and the first lens to the fifth lens are arranged and spaced in sequence. By controlling the focal length of the front lens and the spacing between different lenses or spacing elements, the height of the light in the zoom lens compensation group is reasonably controlled, the path of the light in the zoom lens compensation group is effectively managed, and it is ensured that the light will not be excessively or insufficiently converged when entering the subsequent lens, thereby reducing the field curvature and chromatic aberration, and improving the imaging quality of the zoom lens compensation. While ensuring the optical performance of the zoom lens compensation group, the assembly stability of the lens is also improved, and the reliability variation risk is greatly reduced.

[0053] The following Table 1 shows the resolution change of an optional embodiment of the present application and the zoom lens compensation group in the prior art after assembly under pressure.

[0054]

[0055] Table 1

[0056] It should be noted that the resolution can be intuitively evaluated by MTF analysis, and the performance of the zoom lens compensation group at different spatial frequencies is investigated. The shape and height of the MTF curve reflect the transmission ability of the zoom lens compensation group to different details, and the MTF absolute value in Table 1 is less than 4% to meet the resolution standard. Under the premise that the value of T12 / T23 is too large, the propagation path of the light between the first lens and the second lens is too long, and the large air gap affects the compactness and stability of the entire zoom lens compensation group. At this time, the value of f2 / (EP12-T12) is too large, which causes the second lens to insufficiently focus the light, and the zoom performance of the zoom lens compensation group is reduced; the value of f2 / (EP12-T12) is too small, and the light is excessively converged after entering the second lens, which further causes the incident angle of the light at the third lens to be too large, affecting the performance of the third lens, i.e., the MTF absolute value of the mirror group 4 and the mirror group 6 does not meet the determination standard. In addition, under the premise that the value of T12 / T23 is too small, the small air gap limits the movement range of the second lens, affecting the zoom performance, and at this time, the MTF absolute value of the mirror group 7 with too large f2 / (EP12-T12) or the mirror group 9 with too small f2 / (EP12-T12) also does not meet the determination standard.

[0057] By limiting at least one of T12 / T23, f2 / (EP12-T12) within a reasonable range, the resolving power can be effectively improved, the performance of the zoom lens compensation group is ensured, the assembly stability of the zoom lens compensation group is improved, the aberration is reduced, the imaging quality is improved, and the performance and reliability of the zoom lens compensation group are realized. For example, the lens group 1 and the lens group 3 satisfy 12.10≤T12 / T23≤14.81, or the lens group 5 and the lens group 8 satisfy 5.99≤f2 / (EP12-T12)≤6.63, and the resolving power standard can also be met. Further, as shown in the lens group 2, the values of T12 / T23 and f2 / (EP12-T12) are limited within the range of the present application.

[0058] As shown in Figures 14 to 17 , Figure 14 and Figure 15 are displacement nephograms of the zoom lens compensation group of an optional embodiment of the present application before and after being stressed, Figure 16 and Figure 17 are stress nephograms of the zoom lens compensation group of an optional embodiment of the present application before and after being stressed. By reasonably setting the range of T12 / T23 and f2 / (EP12-T12), the zoom lens compensation group has good assembly stability, avoids excessive stress concentration on a certain position of the lens or the lens barrel, and effectively controls the stress deformation of the lens and the lens barrel, thereby enhancing the structural stability of the zoom lens compensation group and avoiding the influence on the focal length change performance.

[0059] In the present embodiment, the outer diameter D0m of the image side end surface of the lens barrel, the inner diameter d0m of the image side end surface of the lens barrel, the outer diameter D0s of the object side end surface of the lens barrel, and the inner diameter d0s of the object side end surface of the lens barrel satisfy: 3.63≤(D0m-d0m) / (D0s-d0s)≤5.99. If the value of (D0m-d0m) / (D0s-d0s) is too large, it indicates that the difference between the outer diameter and the inner diameter of the image side end surface of the lens barrel is relatively large with respect to the difference between the outer diameter and the inner diameter of the object side end surface of the lens barrel, which leads to that the inside of the lens barrel is too tight and the light ray angle of the edge field of view cannot be effectively controlled, thereby increasing the manufacturing difficulty and the optical path deviation risk of the zoom lens compensation group. If the value of (D0m-d0m) / (D0s-d0s) is too small, the difference between the outer diameter and the inner diameter of the image side end surface of the lens barrel is small, which leads to that the edge light ray angle is insufficient and the imaging quality of the edge field of view of the zoom lens compensation group is affected, and the tolerance of the zoom lens compensation group to the manufacturing tolerance is reduced. By controlling (D0m-d0m) / (D0s-d0s) within a reasonable range, the light ray angle of the edge field of view can be ensured to be reasonable, the tolerance tolerance of the zoom lens compensation group is improved, and the zoom lens compensation group can maintain high performance, good assembly stability and reliability.

[0060] In the embodiment, the effective focal length f1 of the first lens, the central thickness CT1 of the first lens, and the interval EP01 between the object side end surface of the lens barrel and the first spacer element in the optical axis direction satisfy: 14.22≤f1 / CT1+f1 / EP01≤22.55. If the value of f1 / CT1+f1 / EP01 is too large, the effective focal length of the first lens is too large relative to the central thickness of the first lens and the object side end surface of the lens barrel, resulting in excessive reduction of the thickness of the first lens or the size of the object side end surface of the lens barrel, affecting the structural strength of the zoom lens compensation group and the structural stability of the lens barrel. If the value of f1 / CT1+f1 / EP01 is too small, the effective focal length of the first lens is relatively small, which does not match the central thickness of the first lens and the object side end surface of the lens barrel, resulting in insufficient convergence of light rays in the first lens, reducing the long focal length performance. By controlling f1 / CT1+f1 / EP01 within a reasonable range, the power of the first lens and the size of the object side end surface of the lens barrel can be reasonably controlled, ensuring that the long focal length characteristics are maintained while optimizing the small size advantage of the zoom lens compensation group, thereby improving the imaging quality of the zoom lens compensation group.

[0061] In the embodiment, the air interval T23 of the second lens and the third lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy: 8.99≤T23 / CP2≤12.11. If the value of T23 / CP2 is too large, the relative position of the third lens on the optical axis is difficult to control. If the value of T23 / CP2 is too small, the normal propagation of light rays between the second lens and the third lens is disturbed, affecting the optimization of the optical path. By controlling T23 / CP2 within a reasonable range, the relative position of the third lens on the optical axis can be ensured, and the light rays can be optimized to enter the third lens and the fourth lens along the given optical path, thereby ensuring the imaging quality of the zoom lens compensation group.

[0062] In the embodiment, the effective focal length f3 of the third lens, the central thickness CT3 of the third lens, the refractive index N3 of the third lens, and the interval EP23 between the second spacer element and the third spacer element in the optical axis direction satisfy: -4.94≤(f3*CT3*N3) / EP23≤-4.21. If the value of (f3*CT3*N3) / EP23 is too large, the structure of the third lens is too thick, affecting the propagation efficiency of the light rays in the zoom lens compensation group and increasing the volume of the zoom lens compensation group. If the value of (f3*CT3*N3) / EP23 is too small, the structure of the third lens is too thin, resulting in reduced structural strength of the third lens, and possibly affecting the normal incidence of light rays into the fourth lens, thereby affecting the imaging. By controlling (f3*CT3*N3) / EP23 within a reasonable range, the third lens has sufficient structural strength, thereby improving the assembly stability of the zoom lens compensation group, and the optical path passing through the third lens is planned to ensure that the light rays enter the fourth lens along the given optical path, thereby ensuring the imaging quality of the zoom lens compensation group.

[0063] In the embodiment, the effective focal length f4 of the fourth lens, the interval EP34 of the third spacer element and the fourth spacer element along the optical axis direction satisfy: 3.11≤f4 / EP34≤3.52. If the value of f4 / EP34 is too large, the relative position of the fourth lens on the optical axis is unstable, which affects the imaging quality of the zoom lens compensation group. If the value of f4 / EP34 is too small, the f4 and EP34 are not matched, which results in poor focusing effect of light rays in the fourth lens, and finally the imaging quality is reduced. By controlling f4 / EP34 within a reasonable range, the relative position of the fourth lens on the optical axis can be ensured, the length size of the zoom lens compensation group is controlled, and the imaging quality is optimized.

[0064] In the embodiment, the interval EP34 of the third spacer element and the fourth spacer element along the optical axis direction, the maximum thickness CP4 of the fourth spacer element, and the central thickness CT4 of the fourth lens satisfy: 2.36≤EP34 / (CT4+CP4)≤2.71. If the value of EP34 / (CT4+CP4) is too large, the length of the zoom lens compensation group will increase, and it is difficult to realize small volume design. If the value of EP34 / (CT4+CP4) is too small, the assembly stability of the fourth lens is poor, which results in inaccurate control of the axial size of light rays from the fourth lens to the fifth lens, and affects imaging. By controlling EP34 / (CT4+CP4) within a reasonable range, the assembly stability of the fourth lens can be improved, and then the axial size of the fourth lens to the fifth lens is controlled, and the volume of the zoom lens compensation group is reduced.

[0065] In the embodiment, the radius of curvature R2 of the image side surface of the first lens, the outer diameter D1s of the object side surface of the first spacer element, and the inner diameter d1s of the object side surface of the first spacer element satisfy: -47.70≤R2 / (D1s-d1s)≤-25.60. If the value of R2 / (D1s-d1s) is too large, the light rays are not diffused enough in the first lens, which affects the optimization of the subsequent light path. If the value of R2 / (D1s-d1s) is too small, the radius of curvature of the image side surface of the first lens is not reasonably designed, which results in excessive diffusion of light rays in the first lens, increases stray light, and affects the imaging quality. By controlling R2 / (D1s-d1s) within a reasonable range, the imaging quality of the zoom lens compensation group can be improved, and the assembly stability of the zoom lens compensation group can be improved.

[0066] In the embodiment, the curvature radius R4 of the image side surface of the second lens, the outer diameter D2s of the object side surface of the second spacer element, and the inner diameter d2s of the object side surface of the second spacer element satisfy: 12.52≤R4 / (D2s-d2s)≤17.05. If the value of R4 / (D2s-d2s) is too large, the angle of the exiting light rays is excessively diffused, increasing the size of the zoom lens compensation group and the risk of stray light. If the value of R4 / (D2s-d2s) is too small, the focusing degree of the light rays at the second lens is insufficient, affecting the optimization of the subsequent light path and the imaging quality. By controlling R4 / (D2s-d2s) within a reasonable range, the angle of the light path can be improved, and the optical performance of the zoom lens compensation group can be improved, which can reduce the size of the zoom lens compensation group while controlling the exiting light rays of the second lens.

[0067] In the embodiment, the outer diameter D2m of the image side surface of the second spacer element, the outer diameter D3s of the object side surface of the third spacer element, and the curvature radius R5 of the object side surface of the third lens satisfy: -3.84≤R5 / (D2m+D3s)≤-2.39. If the value of R5 / (D2m+D3s) is too large, the focusing of the light rays at the third lens is insufficient, affecting the incidence of the light rays along the intended light path to the fourth lens, and reducing the structural strength of the third lens. If the value of R5 / (D2m+D3s) is too small, the light rays are excessively focused at the third lens, affecting the optimization of the subsequent light path. By controlling R5 / (D2m+D3s) within a reasonable range, the control of the ghost image of the third lens by the zoom lens compensation group can be optimized, and the number of light rays passing through the zoom lens compensation group is ensured. By controlling it, the performance of the zoom lens compensation group is ensured while optimizing the ghost image.

[0068] In the embodiment, the curvature radius R6 of the image side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D3m of the image side surface of the third spacer element, and the inner diameter d3m of the image side surface of the third spacer element satisfy: 2.10≤R6*N3 / (D3m-d3m)≤3.06. If the value of R6*N3 / (D3m-d3m) is too large, the increase of stray light affects the imaging clarity. If the value of R6*N3 / (D3m-d3m) is too small, the curvature radius of the image side surface of the third lens is designed unreasonably, i.e., does not match the size of the third spacer element, affecting the yield and processability of the third lens, and increasing unnecessary stray light. By controlling R6*N3 / (D3m-d3m) within a reasonable range, the yield and processability of the third lens can be improved, and by optimizing the outer diameter and inner diameter of the image side surface of the third spacer element, the risk of stray light can be effectively reduced, and the imaging quality of the zoom lens compensation group can be improved.

[0069] In the embodiment, the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens, the outer diameter D0m of the image side end surface of the lens barrel, and the inner diameter d0m of the image side end surface of the lens barrel satisfy: -13.97≤(f5 / CT5)*(D0m / d0m)≤-12.66. If the value of (f5 / CT5)*(D0m / d0m) is too large, the light rays are insufficiently converged in the fifth lens, affecting the resolution and overall focal length of the zoom lens compensation group. If the value of (f5 / CT5)*(D0m / d0m) is too small, the effective focal length of the fifth lens, the center thickness of the fifth lens, and the size of the image side end surface of the lens barrel do not match, causing the light rays to be excessively converged in the fifth lens, affecting the imaging quality. By controlling (f5 / CT5)*(D0m / d0m) within a reasonable range, the fifth lens can be ensured to be in the correct position on the optical axis, while the size of the zoom lens compensation group and the number of outgoing light rays are controlled, thereby ensuring the resolution and optical performance of the zoom lens compensation group.

[0070] In the embodiment, the effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens, the outer diameter D0m of the image side end surface of the lens barrel, and the inner diameter d0m of the image side end surface of the lens barrel satisfy: -13.97≤(f5 / CT5)*(D0m / d0m)≤-12.66. If the value of (f5 / CT5)*(D0m / d0m) is too large, the light rays are insufficiently converged in the fifth lens, affecting the resolution and overall focal length of the zoom lens compensation group. If the value of (f5 / CT5)*(D0m / d0m) is too small, the effective focal length of the fifth lens, the center thickness of the fifth lens, and the size of the image side end surface of the lens barrel do not match, causing the light rays to be excessively converged in the fifth lens, affecting the imaging quality. By controlling (f5 / CT5)*(D0m / d0m) within a reasonable range, the fifth lens can be ensured to be in the correct position on the optical axis, while the size of the zoom lens compensation group and the number of outgoing light rays are controlled, thereby ensuring the resolution and optical performance of the zoom lens compensation group.

[0071] In the embodiment, the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power. The first lens, the second lens, and the fourth lens have positive refractive power, and the third lens and the fifth lens have negative refractive power, which can ensure a reasonable order of light rays converging first and then diverging in the lens group, optimize the propagation path of the light beam at different focal lengths, reduce aberrations such as field curvature and chromatic aberration, improve imaging quality, and at the same time meet the requirements of miniaturization and high reliability of the zoom lens compensation group.

[0072] In the embodiment, the object side surface of the first lens is convex, the image side surface of the first lens is convex, the object side surface of the second lens is convex, the image side surface of the second lens is concave, the object side surface of the third lens is concave, the image side surface of the third lens is concave, the object side surface of the fourth lens is convex, the image side surface of the fourth lens is convex; the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The surface type of the lens is set as above, which can ensure that the light passes through reasonable refraction and reflection in the zoom lens compensation group, optimize the focusing and divergence of the light, reduce chromatic aberration and field curvature, and improve the imaging clarity. In addition, the surface type setting of the lens also helps to control the light angle of the edge field of view, which is beneficial to the imaging of the edge field of view by the zoom lens compensation group, while improving the stability of the zoom lens compensation group, reducing the risk of reliability variation, and ensuring that the zoom lens compensation group has high performance, small size and high reliability.

[0073] Optionally, the zoom lens compensation group in the embodiment of the application can be simulated by software and / or tools such as ZEMAX, CODEV, etc. Optionally, the zoom lens compensation group can be simulated by CODEV software. In the process of simulation by software and / or tools such as the above, the surface type of the surface of each lens can be simulated and adjusted appropriately according to the surface type of the surface provided by the software and / or the tools used.

[0074] In the embodiment, each lens can be selected to be a cut-edge lens. The cut-edge lens has a cut-edge structure and a non-cut-edge structure on the outer diameter surface, and the outer diameter of the cut-edge structure is smaller than that of the non-cut-edge structure. The outer diameter of the cut-edge lens generally refers to the outer diameter of the non-cut-edge structure.

[0075] In the embodiment, each spacer element can be selected to be a cut-edge spacer element. The cut-edge spacer element has a cut-edge portion and a non-cut-edge portion on the outer ring surface, and the outer diameter of the cut-edge portion is smaller than that of the non-cut-edge portion. The outer diameter of the cut-edge spacer element generally refers to the maximum outer diameter of the non-cut-edge portion.

[0076] Second embodiment

[0077] According to the utility model discloses another aspect still provides a kind of zoom lens compensation group, the number of lens with refractive power of zoom lens compensation group is five, zoom lens compensation group includes lens group, interval element group and lens barrel, from the object side of zoom lens compensation group to the lens group including sequentially spaced first lens to fifth lens of image side;Interval element group at least includes the first interval element located between first lens and second lens and at least partially contact with the image side of first lens, the second interval element located between second lens and third lens and at least partially contact with the image side of second lens, the third interval element located between third lens and fourth lens and at least partially contact with the image side of third lens, the fourth interval element located between fourth lens and fifth lens and at least partially contact with the image side of fourth lens;Lens group and interval element group are housed in lens barrel;Wherein, the effective focal length f3 of third lens, the center thickness CT3 of third lens, the refractive index N3 of third lens, the interval EP23 between second interval element and third interval element along the direction of optical axis satisfy:-4.94≤(f3*CT3*N3) / EP23≤-4.21;The interval EP34 between third interval element and fourth interval element along the direction of optical axis, the maximum thickness CP4 of fourth interval element, the center thickness CT4 of fourth lens satisfy:2.36≤EP34 / (CT4+CP4)≤2.71.

[0078] The zoom lens compensation group of the application uses five lenses with refractive power, and the first to fifth lenses are arranged and spaced in sequence. By controlling (f3*CT3*N3) / EP23 within a reasonable range, the third lens has sufficient structural strength, avoiding the problem of unstable assembly, and the focusing effect of the third lens on the light beam is optimized, thereby better controlling the field curvature and chromatic aberration, especially during zooming, to ensure the imaging quality of the zoom lens compensation group at different focal lengths. Coordinating the center thickness of the third lens and the interval between the second interval element and the third interval element along the optical axis helps to reduce stray light and image quality degradation caused by lens displacement during zooming, improving the imaging clarity and contrast of the zoom lens compensation group. However, this situation can easily lead to a larger volume of the third lens, thereby increasing the size or weight of the zoom lens compensation group. By controlling EP34 / (CT4+CP4) within a reasonable range, the center thickness, edge thickness of the fourth lens, and the spacing between the fourth and fifth lenses can be reasonably controlled, balanced with the third lens, optimized the overall size and weight of the zoom lens compensation group, and the shape of each lens avoids extreme design, reducing the risk of shaking after assembly, and improving the stability of the zoom lens compensation group.

[0079] The other conditional expressions in the above embodiments are also included in this embodiment, which will not be repeated here.

[0080] Third embodiment

[0081] According to another aspect of the utility model, still provide a kind of zoom lens compensation group, the number of lens with refractive power of zoom lens compensation group is five, and zoom lens compensation group includes lens group, spacer element group and lens barrel, and from the object side of zoom lens compensation group to the lens group including first lens to fifth lens sequentially spaced arrangement on the image side;Spacer element group at least includes the first spacer element located between first lens and second lens and at least partially contacted with the image side of first lens, the second spacer element located between second lens and third lens and at least partially contacted with the image side of second lens, the third spacer element located between third lens and fourth lens and at least partially contacted with the image side of third lens, the fourth spacer element located between fourth lens and fifth lens and at least partially contacted with the image side of fourth lens;Lens group and spacer element group are housed in lens barrel;Wherein, the effective focal length f3 of third lens, the interval EP23 of second spacer element and third spacer element along the optical axis direction, the air interval T23 of second lens and third lens on optical axis satisfy:-0.40≤f3 / (EP23-T23)≤-0.21;The curvature radius R4 of the image side of second lens, the outer diameter D2s of the object side of second spacer element, the inner diameter d2s of the object side of second spacer element satisfy:12.52≤R4 / (D2s-d2s)≤17.05.

[0082] The zoom lens compensation group of the application uses five lenses with refractive power, and the first lens to the fifth lens are arranged and spaced in sequence.By controlling f3 / (EP23-T23) within a certain range, the stable position of the third lens on the optical axis can be ensured, the shaking of the zoom lens compensation group during assembly and zooming is reduced, and the reliability and service life of the zoom lens compensation group are improved.In addition, reasonable setting of f3 / (EP23-T23) helps to control the focusing effect of the third lens on light rays.However, in this case, the internal stray light energy of the zoom lens compensation group is relatively strong, and the imaging quality is reduced.By controlling R4 / (D2s-d2s) within a reasonable range, the light path angle can be improved, the optical performance of the zoom lens compensation group is improved, and the second spacer element intercepts the edge stray light, further reducing the aberration of the zoom lens compensation group.

[0083] It should be noted that the other conditional expressions in the above embodiments are also included in the present embodiment, which will not be repeated here.

[0084] The zoom lens compensation group in the present application can adopt multiple lenses, for example, five lenses as described above. In the present application, at least one of the lens surfaces of each lens is an aspheric lens surface. The aspheric lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspheric lens has better curvature radius characteristics, and has the advantages of improving the distortion aberration and improving the astigmatism aberration. After the aspheric lens is adopted, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0085] However, those skilled in the art should understand that the number of lenses constituting the zoom lens compensation group can be changed without departing from the technical solutions claimed by the present application, to obtain the various results and advantages described in the present specification. For example, although five lenses are described as an example in the embodiments, the zoom lens compensation group is not limited to including five lenses. If necessary, the zoom lens compensation group can also include other numbers of lenses.

[0086] Figure 1 The size annotation diagram of one zoom lens compensation group of the present application is shown, Figure 1 The parameters d1s, D2s, CP2, EP34, etc. are marked in the figure, so that the meaning of the parameters can be clearly and intuitively understood. In order to facilitate the description of the zoom lens compensation group and the surface type of the specific lens, these parameters will not be embodied in the figure when the specific embodiments are described later.

[0087] The specific surface type and parameters of the zoom lens compensation group applicable to the above-described embodiments are further described below with reference to the drawings.

[0088] It should be noted that any one of the following examples one to twelve is applicable to all embodiments of the present application.

[0089] Example one

[0090] As Figure 2 shown, the zoom lens compensation group of the first embodiment of the present application is described. Figure 2 The structural schematic diagram of the zoom lens compensation group of the first embodiment is shown.

[0091] As Figure 2 shown, the zoom lens compensation group includes, in order from the object side to the image side: 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, and a fifth lens E5.

[0092] In the embodiment, two spacer elements are further provided between the first lens E1 and the second lens E2 and abut against the image side of the first spacer element P1, two spacer elements are further provided between the third lens E3 and the fourth lens E4 and abut against the image side of the third spacer element P3, two spacer elements are further provided between the fourth lens E4 and the fifth lens E5 and abut against the image side of the fourth spacer element P4. The thicker spacer elements are used to control the interval between the adjacent lenses to meet the imaging requirements, and the smaller inner diameter of the thinner spacer elements is used to intercept stray light to improve the edge imaging effect. In addition, the image side end of the lens barrel P0 has an abutting section extending towards the optical axis for the image side surface of the fifth lens E5 to abut against. That is, the zoom lens compensation group of the embodiment is sequentially assembled from the fifth lens E5 to the first lens E1.

[0093] In the embodiment, the first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has positive refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave.

[0094] Table 2 shows the basic structural parameters of the zoom lens compensation group of the embodiment, wherein the units of the curvature radius, the thickness / distance, the effective radius and the focal length are all millimeters (mm).

[0095] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Conic constant S1 Asphere 13.8696 1.9000 1.55 56.1 1.1366 S2 Asphere -67.4236 3.2219 99.0000 S3 Asphere 5.1522 1.5566 1.55 56.1 -0.5427 S4 Asphere 44.9545 0.1107 99.0000 STO Sphere Infinity 0.1556 S5 Asphere -44.0358 0.5729 1.68 19.2 -11.6404 S6 Asphere 5.6503 3.2400 0.0677 S7 Asphere 13.9211 1.3125 1.68 19.2 0.1607 S8 Asphere -16.1862 2.3239 7.9067 S9 Asphere 20.7880 1.6500 1.62 25.9 52.7037 S10 Asphere 5.7313 1.6165 0.4469

[0096] Table 2

[0097] In the embodiment, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical surfaces, and the surface type of each aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0098]

[0099] wherein x is the distance from the vertex of the aspherical surface when the aspherical surface is at a position with a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 2 above); k is the conic coefficient; and Ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below shows the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the aspherical surfaces S1-S10 in the embodiment.

[0100] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.7078E-04 1.2684E-05 1.9790E-07 -1.2789E-07 4.4485E-09 8.5942E-10 -1.1623E-10 5.6920E-12 -1.0456E-13 S2 -5.1984E-04 4.1057E-05 3.0212E-06 -1.2898E-06 1.8465E-07 -1.5696E-08 8.0286E-10 -2.2571E-11 2.6254E-13 S3 -9.1806E-04 -2.8577E-04 2.4996E-04 -9.6968E-05 2.2041E-05 -3.0529E-06 2.5160E-07 -1.1300E-08 2.1269E-10 S4 8.4086E-04 -2.6453E-03 2.0496E-03 -8.7157E-04 2.1992E-04 -3.3767E-05 3.0927E-06 -1.5523E-07 3.2850E-09 S5 1.7257E-03 -1.8963E-03 1.3633E-03 -5.8396E-04 1.5174E-04 -2.4101E-05 2.2840E-06 -1.1861E-07 2.5984E-09 S6 -1.5029E-04 -5.9903E-04 5.6037E-04 -2.8802E-04 9.0106E-05 -1.7170E-05 1.9453E-06 -1.2078E-07 3.1737E-09 S7 -1.5649E-03 2.0394E-04 -3.4866E-05 4.7480E-06 -2.9838E-07 -1.7159E-08 4.9628E-09 -4.1309E-10 1.3870E-11 S8 -1.9996E-03 2.7437E-04 -3.6377E-05 2.0110E-06 5.6838E-07 -1.5575E-07 1.7588E-08 -1.0211E-09 2.5515E-11 S9 -5.8935E-03 6.2362E-04 -2.8657E-04 1.5996E-04 -6.0554E-05 1.4167E-05 -1.9909E-06 1.5396E-07 -5.0639E-09 S10 -5.0955E-03 5.0177E-04 -6.1327E-05 5.5554E-06 6.3493E-07 -3.2086E-07 4.8028E-08 -3.3812E-09 9.4892E-11

[0101] Table 3

[0102] Embodiment Two

[0103] As shown in Table 3, the zoom lens compensation group of Embodiment Two of the present application is described, which is different from Embodiment One in that the distance and thickness between each spacer element, lens, barrel P0, etc. are different. Figure 3

[0104] A structural schematic diagram of the zoom lens compensation group of Embodiment Two is shown. For brevity, the description of the parts similar to Embodiment One will be omitted. In this embodiment, the wall thickness of the barrel is relatively uniform, which is conducive to reducing the volume of the zoom lens compensation group. Figure 3 Embodiment Three

[0105] As shown in Table 4, the zoom lens compensation group of Embodiment Three of the present application is described, which is different from Embodiment One in that the distance and thickness between each spacer element, lens, barrel P0, etc. are different.

[0106] Figure 4 A structural schematic diagram of the zoom lens compensation group of Embodiment Three is shown. For brevity, the description of the parts similar to Embodiment One will be omitted. In this embodiment, the length of the structural part of each lens is smaller, the ring width of the spacer element is smaller, and the wall thickness of the barrel is relatively uniform, which is conducive to controlling the miniaturization of the zoom lens compensation group.

[0107] Figure 4 Embodiment Four

[0108] As shown in Table 5, the zoom lens compensation group of Embodiment Four of the present application is described. A structural schematic diagram of the zoom lens compensation group of Embodiment Four is shown.

[0109] Figure 5 As shown in Table 5, the zoom lens compensation group of Embodiment Four of the present application is described. Figure 5 A structural schematic diagram of the zoom lens compensation group of Embodiment Four is shown.

[0110] As shown in Table 5, the zoom lens compensation group of Embodiment Four of the present application is described. Figure 5 As shown in Table 5, the zoom lens compensation group of Embodiment Four of the present application is described.

[0111] ​In the embodiment, two spacer elements are further provided between the first lens E1 and the second lens E2 and abut against the image side of the first spacer element P1, two spacer elements are further provided between the third lens E3 and the fourth lens E4 and abut against the image side of the third spacer element P3, two spacer elements are further provided between the fourth lens E4 and the fifth lens E5 and abut against the image side of the fourth spacer element P4, which not only ensures stable abutment, but also controls the interval between the adjacent lenses by using the spacer elements with relatively large thickness to meet the imaging requirements and intercepts stray light by using the smaller inner diameter of the spacer elements with relatively small thickness to improve the edge imaging effect. In addition, the image side end of the lens barrel P0 has an abutment section protruding towards the optical axis for the image side surface of the fifth lens E5 to abut against, that is, the zoom lens compensation group of the embodiment is sequentially assembled from the fifth lens E5 to the first lens E1.

[0112] In the embodiment, the first lens E1 has positive refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has positive refractive power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative refractive power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive refractive power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative refractive power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave.

[0113] Table 4 shows the basic structural parameters of the zoom lens compensation group of the fourth embodiment, wherein the units of the curvature radius, the thickness / distance, the effective radius and the focal length are millimeters (mm).

[0114] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Conic constant S1 Asphere 13.7853 3.0000 1.55 56.1 0.9232 S2 Asphere -71.4451 2.8263 99.0000 S3 Asphere 5.0944 1.5011 1.55 56.1 -0.5124 S4 Asphere 45.8842 0.123 99.0000 STO Sphere Infinity 0.0954 S5 Asphere -66.9883 0.5682 1.68 19.2 -26.7574 S6 Asphere 5.3185 3.2432 0.1038 S7 Asphere 14.1139 1.2504 1.68 19.2 0.5559 S8 Asphere -15.8121 2.2239 7.9441 S9 Asphere 20.5593 1.8332 1.62 25.9 51.9362 S10 Asphere 5.8460 1.9017 0.3809

[0115] Table 4

[0116] Table 5 shows the high-order term coefficients of the aspherical surfaces that can be used in the embodiment, wherein the surface type of each aspherical surface can be defined by the formula (1) given in the first embodiment. In the embodiment, the object side surface and the image side surface of each of the first lens to the fifth lens are aspherical surfaces.

[0117]

[0118]

[0119] Table 5

[0120] Embodiment Five

[0121] As Figure 6As shown, the zoom lens compensation group of Embodiment 5 of this application is described. The difference between Embodiment 4 and Embodiment 5 is that the distance and thickness between the various spacer elements, lenses, lens barrels P0, etc. are different.

[0122] Figure 6 A schematic diagram of the zoom lens compensation assembly in Embodiment 5 is shown. For simplicity, descriptions similar to those in Embodiment 4 are omitted. In this embodiment, the lens barrel has a relatively uniform wall thickness, which helps to reduce the volume of the zoom lens compensation assembly.

[0123] Example 6

[0124] like Figure 7 As shown, the zoom lens compensation group of Embodiment Six of this application is described. The difference between Embodiment Four and Embodiment Six is ​​that the distance and thickness between the various spacer elements, lenses, lens barrels P0, etc. are different.

[0125] Figure 7 A schematic diagram of the zoom lens compensation assembly of Embodiment Six is ​​shown. For simplicity, descriptions similar to those in Embodiment Four are omitted. In this embodiment, the length of each lens's structural portion is relatively small, the width of the annular band of the spacer element is relatively small, and the wall thickness of the lens barrel is relatively uniform, which is beneficial for miniaturizing the zoom lens compensation assembly.

[0126] Example 7

[0127] like Figure 8 As shown, the zoom lens compensation group of Embodiment Seven of this application is described. Figure 8 A schematic diagram of the zoom lens compensation group in Embodiment 7 is shown.

[0128] like Figure 8 As shown, the zoom lens compensation group includes, in sequence from the object side to the image side: first lens E1, first spacer element P1, second lens E2, second spacer element P2, third lens E3, third spacer element P3, fourth lens E4, fourth spacer element P4, and fifth lens E5.

[0129] In the embodiment, two spacer elements are further provided between the first lens E1 and the second lens E2 and abut against the image side of the first spacer element P1, two spacer elements are further provided between the third lens E3 and the fourth lens E4 and abut against the image side of the third spacer element P3, two spacer elements are further provided between the fourth lens E4 and the fifth lens E5 and abut against the image side of the fourth spacer element P4. The thicker spacer elements are used to control the distance between the adjacent lenses to meet the imaging requirements, and the smaller inner diameter of the thinner spacer elements is used to intercept stray light to improve the edge imaging effect. In addition, the image side end of the lens barrel P0 has an abutting section extending towards the optical axis for the image side surface of the fifth lens E5 to abut against. That is, the zoom lens compensation group of the embodiment is sequentially assembled from the fifth lens E5 to the first lens E1.

[0130] In the embodiment, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is convex. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has negative focal power, the object side surface S5 of the third lens is concave, and the image side surface S6 of the third lens is concave. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is convex. The fifth lens E5 has negative focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave.

[0131] Table 6 shows the basic structure parameters of the zoom lens compensation group of the embodiment seven, wherein the units of the curvature radius, the thickness / distance, the effective radius and the focal length are millimeters (mm).

[0132] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Conic constant S1 Asphere 13.2990 2.6000 1.55 56.1 0.9232 S2 Asphere -81.4913 2.6983 99.0000 S3 Asphere 5.1082 1.5440 1.55 56.1 -0.5002 S4 Asphere 46.7919 0.1022 99.0000 STO Sphere Infinity 0.0960 S5 Asphere -71.6160 0.5660 1.68 19.2 -14.199 S6 Asphere 5.2690 3.1574 0.1296 S7 Asphere 14.3915 1.1979 1.68 19.2 0.8661 S8 Asphere -15.5155 2.1215 7.9372 S9 Asphere 20.5073 1.8420 1.62 25.9 51.7821 S10 Asphere 5.9095 2.1141 0.3752

[0133] Table 6

[0134] Table 7 shows the high-order term coefficients of the aspherical surfaces that can be used in the embodiment. The surface type of each aspherical surface can be defined by the formula (1) given in the embodiment one. In the embodiment, the object side surface and the image side surface of each of the first lens to the fifth lens are aspherical surfaces.

[0135] Surface number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 -1.6331E-04 1.1714E-05 -7.7477E-07 1.0370E-07 -2.5410E-08 3.2319E-09 -2.2511E-10 8.2283E-12 -1.2527E-13 S2 -5.6518E-04 5.4097E-05 -5.1014E-07 -6.0182E-07 9.0457E-08 -7.3874E-09 3.6469E-10 -1.0205E-11 1.2135E-13 S3 -9.1291E-04 -1.1452E-04 1.0797E-04 -3.9255E-05 8.5227E-06 -1.1384E-06 9.0386E-08 -3.8736E-09 6.8282E-11 S4 -1.1141E-04 -1.0236E-03 8.1184E-04 -3.5562E-04 9.2245E-05 -1.4469E-05 1.3449E-06 -6.8094E-08 1.4459E-09 S5 3.3957E-06 -4.8769E-05 2.9278E-04 -1.9109E-04 5.9281E-05 -1.0326E-05 1.0317E-06 -5.5263E-08 1.2316E-09 S6 -1.4432E-03 9.0990E-04 -3.3819E-04 7.7099E-05 -9.5090E-06 3.1431E-07 6.3621E-08 -7.8853E-09 2.8096E-10 S7 -1.5859E-03 2.8688E-04 -5.7341E-05 9.6097E-06 -1.3931E-06 1.6025E-07 -1.2626E-08 5.7756E-10 -1.0541E-11 S8 -2.0361E-03 3.4964E-04 -6.5110E-05 9.9002E-06 -1.1843E-06 1.0440E-07 -5.8402E-09 1.5858E-10 -6.7264E-14 S9 -5.4843E-03 5.1536E-04 -2.8730E-04 1.6608E-04 -6.3487E-05 1.4970E-05 -2.1205E-06 1.6545E-07 -5.4974E-09 S10 -4.6571E-03 3.0930E-04 -9.7107E-06 -9.4206E-06 4.2110E-06 -9.3276E-07 1.1733E-07 -7.9391E-09 2.2430E-10

[0136] Table 7

[0137] Embodiment eight

[0138] As Figure 9 shown, the embodiment eight of the application is described. The difference between the embodiment eight and the embodiment seven is that the distance and the thickness between each spacer element, lens, lens barrel P0, etc. are different.

[0139] Figure 9 A schematic diagram of the zoom lens compensation assembly of Embodiment 8 is shown. For simplicity, descriptions similar to those in Embodiment 7 are omitted. In this embodiment, the length of each lens's structural portion is relatively small, the width of the annular band of the spacer element is relatively small, and the wall thickness of the lens barrel is relatively uniform, which is beneficial for miniaturizing the zoom lens compensation assembly.

[0140] Example 9

[0141] like Figure 10 As shown, the zoom lens compensation group of Embodiment Nine of this application is described. The difference between Embodiment Seven and Embodiment Seven is that the distance and thickness between the various spacer elements, lenses, lens barrels P0, etc. are different.

[0142] Figure 10 A schematic diagram of the zoom lens compensation assembly of Embodiment Nine is shown. For simplicity, descriptions similar to those in Embodiment Seven are omitted. The lens barrel has a relatively uniform wall thickness, which helps to reduce the volume of the zoom lens compensation assembly.

[0143] Example 10

[0144] like Figure 11 As shown, the zoom lens compensation group of Embodiment 10 of this application is described. Figure 11 A schematic diagram of the zoom lens compensation group in Embodiment 10 is shown.

[0145] like Figure 11 As shown, the zoom lens compensation group includes, in sequence from the object side to the image side: first lens E1, first spacer element P1, second lens E2, second spacer element P2, third lens E3, third spacer element P3, fourth lens E4, fourth spacer element P4, and fifth lens E5.

[0146] In this embodiment, two spacer elements are provided between the first lens E1 and the second lens E2, resting on the image side of the first spacer element P1. Similarly, two spacer elements are provided between the third lens E3 and the fourth lens E4, resting on the image side of the third spacer element P3. Furthermore, two spacer elements are provided between the fourth lens E4 and the fifth lens E5, resting on the image side of the fourth spacer element P4. This ensures stable support while using thicker spacer elements to control the spacing between adjacent lenses to meet imaging requirements, and uses thinner spacer elements with smaller inner diameters to intercept stray light, improving edge imaging performance. Additionally, the image-side end of the lens barrel P0 has a support section extending towards the optical axis for the image-side surface of the fifth lens E5 to rest on. In other words, the zoom lens compensation group in this embodiment is assembled sequentially from the fifth lens E5 to the first lens E1.

[0147] In this embodiment, the first lens E1 has positive optical power, its object-side surface S1 is convex, and its image-side surface S2 is convex. The second lens E2 has positive optical power, its object-side surface S3 is convex, and its image-side surface S4 is concave. The third lens E3 has negative optical power, its object-side surface S5 is concave, and its image-side surface S6 is concave. The fourth lens E4 has positive optical power, its object-side surface S7 is convex, and its image-side surface S8 is convex. The fifth lens E5 has negative optical power, its object-side surface S9 is convex, and its image-side surface S10 is concave.

[0148] Table 8 shows the basic structural parameters of the zoom lens compensation group in Embodiment 10, where the units for radius of curvature, thickness / distance, effective radius, and focal length are all millimeters (mm).

[0149]

[0150]

[0151] Table 8

[0152] Table 9 shows the higher-order coefficients that can be used for each aspherical mirror in the embodiments, wherein the surface shape of each aspherical surface can be defined by formula (1) given in Embodiment 1 above. In this embodiment, the object-side and image-side surfaces of the first to fifth lenses are all aspherical.

[0153] Surface number A4 A6 A8 A1 A12 A14 A16 A18 A20 S1 -1.5888E-04 9.5367E-06 -1.0819E-06 1.9448E-07 -3.2011E-08 3.1765E-09 -1.8747E-10 6.0803E-12 -8.4354E-14 S2 -5.1686E-04 4.5096E-05 -1.7825E-06 -2.9952E-08 1.6971E-09 5.7006E-10 -6.4144E-11 2.7199E-12 -4.5583E-14 S3 -8.4613E-04 -1.2543E-04 1.1250E-04 -4.3041E-05 9.8274E-06 -1.3679E-06 1.1272E-07 -5.0204E-09 9.2527E-11 S4 -3.2468E-04 -7.4992E-04 6.6184E-04 -3.1160E-04 8.4924E-05 -1.3805E-05 1.3188E-06 -6.8287E-08 1.4780E-09 S5 -2.4965E-04 2.6916E-04 1.0865E-04 -1.2979E-04 4.6821E-05 -8.7711E-06 9.1666E-07 -5.0690E-08 1.1578E-09 S6 -1.4876E-03 1.0162E-03 -4.2079E-04 1.1384E-04 -1.9757E-05 2.1030E-06 -1.2541E-07 3.2003E-09 3.3620E-12 S7 -1.5053E-03 2.5869E-04 -5.1026E-05 8.8917E-06 -1.3950E-06 1.7310E-07 -1.4556E-08 7.1612E-10 -1.4859E-11 S8 -2.0047E-03 3.3141E-04 -5.9254E-05 8.9112E-06 -1.0873E-06 9.9586E-08 -5.8859E-09 1.8244E-10 -1.3305E-12 S9 -5.5013E-03 6.4346E-04 -4.4395E-04 2.6669E-04 -1.0092E-04 2.3322E-05 -3.2239E-06 2.4503E-07 -7.9117E-09 S10 -4.5973E-03 2.9638E-04 -4.2769E-06 -1.1781E-05 4.7880E-06 -1.0126E-06 1.2313E-07 -8.0954E-09 2.2284E-10

[0154] Table 9

[0155] Example 11

[0156] like Figure 12 As shown, the zoom lens compensation group of Embodiment Eleven of this application is described. The difference between Embodiment Ten and Embodiment Eleven is that the distance and thickness between the various spacer elements, lenses, lens barrels, etc. are different.

[0157] Figure 12 A schematic diagram of the zoom lens compensation assembly according to Embodiment Eleven is shown. For simplicity, descriptions similar to those in Embodiment Ten are omitted. In this embodiment, the lens barrel wall thickness is relatively uniform, which helps to reduce the volume of the zoom lens compensation assembly. Simultaneously, the spacer element can have a larger annular band width, improving the stability of the support.

[0158] Example 12

[0159] like Figure 13 As shown, the zoom lens compensation group of Embodiment Twelve of this application is described. The difference between Embodiment Ten and Embodiment Twelve is that the distance and thickness between the various spacer elements, lenses, lens barrels, etc. are different.

[0160] Figure 13 A structural schematic diagram of the zoom lens compensation group of embodiment twelve is shown. For brevity, the description similar to embodiment ten will be omitted. In this embodiment, the length of the structural part of each lens is small, the width of the ring band of the matching spacing element is small, and the wall thickness of the lens barrel is uniform, which is conducive to controlling the miniaturization of the zoom lens compensation group.

[0161] In summary, the zoom lens compensation groups of embodiments one to twelve respectively satisfy the relationships shown in Table 10.

[0162]

[0163]

[0164] Table 10

[0165] Table 11 gives the effective focal lengths f1 to f5 of each lens of the zoom lens compensation groups of embodiments one to twelve, in units of mm.

[0166] Parameter / Embodiment 1 2 3 4 5 6 7 8 9 10 11 12 f1 21.25 21.25 21.25 21.44 21.44 21.44 21.15 21.15 21.15 21.11 21.11 21.11 f2 10.52 10.52 10.52 10.36 10.36 10.36 10.37 10.37 10.37 10.35 10.35 10.35 f3 -7.36 -7.36 -7.36 -7.26 -7.26 -7.26 -7.23 -7.23 -7.23 -7.23 -7.23 -7.23 f4 11.25 11.25 11.25 11.21 11.21 11.21 11.21 11.21 11.21 11.30 11.30 11.30 f5 -13.34 -13.34 -13.34 -13.86 -13.86 -13.86 -14.09 -14.09 -14.09 -14.15 -14.15 -14.15

[0167] Table 11 Table 12 gives the partial structural parameters of the zoom lens compensation groups of embodiments one to twelve, in units of mm.

[0168]

[0169]

[0170] Table 12

[0171] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a stand-alone imaging apparatus 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 zoom lens compensation group described above.

[0172] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0173] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0174] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an either chronological or spatial relation. Rather, these terms can be used solely to distinguish a certain specific entity from another entity. It should be understood that the terms so used in the description are interchangeable under appropriate circumstances.

[0175] The preferred embodiments of the present application have been described above with the specific details. Obviously, many modifications and variations of the present application are possible, and the scope of the present application is not limited to the preferred embodiments but only by the scope of the appended claims.

Claims

1. A zoom lens compensation group, characterized in that, The zoom lens compensation group comprises five lenses with optical power, and includes: The lens group, from the object side to the image side of the zoom lens compensation group, includes a first lens to a fifth lens arranged at intervals in sequence; A group of spacers, comprising at least a first spacer located between the first lens and the second lens and in at least partial contact with the image-side surface of the first lens, a second spacer located between the second lens and the third lens and in at least partial contact with the image-side surface of the second lens, a third spacer located between the third lens and the fourth lens and in at least partial contact with the image-side surface of the third lens, and a fourth spacer located between the fourth lens and the fifth lens and in at least partial contact with the image-side surface of the fourth lens; The lens barrel, wherein the lens group and the spacer element group are housed within the lens barrel; Wherein, the air gap T12 between the first lens and the second lens on the optical axis of the zoom lens compensation group, and the air gap T23 between the second lens and the third lens on the optical axis satisfy the following: 12.10≤T12 / T23≤14.81; The effective focal length f2 of the second lens, the spacing EP12 between the first and second spacers along the optical axis, and the air gap T12 between the first and second lenses on the optical axis satisfy the following condition: 5.99≤f2 / (EP12-T12)≤6.

63.

2. The zoom lens compensation group according to claim 1, characterized in that, The outer diameter D0m of the image-side end face of the lens tube, the inner diameter d0m of the image-side end face of the lens tube, the outer diameter D0s of the object-side end face of the lens tube, and the inner diameter d0s of the object-side end face of the lens tube satisfy the following condition: 3.63≤(D0m-d0m) / (D0s-d0s)≤5.

99.

3. The zoom lens compensation group according to claim 1, characterized in that, The effective focal length f1 of the first lens, the center thickness CT1 of the first lens, and the distance EP01 between the object-side end face of the lens barrel and the first spacer element along the optical axis satisfy the following: 14.22≤f1 / CT1+f1 / EP01≤22.

55.

4. The zoom lens compensation group according to claim 1, characterized in that, The second lens and the third lens satisfy the following conditions between the air gap T23 on the optical axis and the maximum thickness CP2 of the second spacer element: 8.99≤T23 / CP2≤12.

11.

5. The zoom lens compensation group according to claim 1, characterized in that, The effective focal length f3 of the third lens, the center thickness CT3 of the third lens, the refractive index N3 of the third lens, and the spacing EP23 between the second spacer element and the third spacer element along the optical axis satisfy the following: -4.94≤(f3*CT3*N3) / EP23≤-4.

21.

6. The zoom lens compensation group according to claim 1, characterized in that, The effective focal length f4 of the fourth lens and the spacing EP34 between the third and fourth spacers along the optical axis satisfy the following: 3.11≤f4 / EP34≤3.

52.

7. The zoom lens compensation group according to claim 1, characterized in that, The spacing EP34 between the third and fourth spacers along the optical axis, the maximum thickness CP4 of the fourth spacer, and the center thickness CT4 of the fourth lens satisfy the following condition: 2.36≤EP34 / (CT4+CP4)≤2.

71.

8. The zoom lens compensation group according to claim 1, characterized in that, The radius of curvature R2 of the image side of the first lens, the outer diameter D1s of the object side of the first spacer element, and the inner diameter d1s of the object side of the first spacer element satisfy the following: -47.70≤R2 / (D1s-d1s)≤-25.

60.

9. The zoom lens compensation group according to claim 1, characterized in that, The radius of curvature R4 of the image side of the second lens, the outer diameter D2s of the object side of the second spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy the following condition: 12.52≤R4 / (D2s-d2s)≤17.

05.

10. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The outer diameter D2m of the image side of the second spacer element, the outer diameter D3s of the object side of the third spacer element, and the radius of curvature R5 of the object side of the third lens satisfy the following condition: -3.84≤R5 / (D2m+D3s)≤-2.

39.

11. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The radius of curvature R6 of the image-side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D3m of the image-side surface of the third spacer element, and the inner diameter d3m of the image-side surface of the third spacer element satisfy the following condition: 2.10≤R6*N3 / (D3m-d3m)≤3.

06.

12. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The effective focal length f5 of the fifth lens, the center thickness CT5 of the fifth lens, the outer diameter D0m of the image-side end face of the lens barrel, and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following condition: -13.97≤(f5 / CT5)*(D0m / d0m)≤-12.

66.

13. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The radius of curvature R8 of the image side of the fourth lens, the outer diameter D4s of the object side of the fourth spacer element, and the inner diameter d4s of the object side of the fourth spacer element satisfy the following condition: -5.79≤R8 / (D4s-d4s)≤-3.

94.

14. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The first lens has positive optical power, the second lens has positive optical power, the third lens has negative optical power, the fourth lens has positive optical power, and the fifth lens has negative optical power.

15. The zoom lens compensation group according to any one of claims 1 to 9, characterized in that, The object-side surface of the first lens is convex, the image-side surface of the first lens is convex, the object-side surface of the second lens is convex, the image-side surface of the second lens is concave, the object-side surface of the third lens is concave, the image-side surface of the third lens is concave, the object-side surface of the fourth lens is convex, the image-side surface of the fourth lens is convex; the object-side surface of the fifth lens is convex, and the image-side surface of the fifth lens is concave.

Images