Optical lens assembly

Abstract

The application provides an optical lens, comprising: a lens barrel; a first lens to a fifth lens sequentially arranged in the lens barrel from an object side to an image side of the optical lens, wherein the fourth lens has positive refractive power; at least five positioning members, wherein the fourth positioning member is in contact with a part of an image side surface of the fourth lens, and the fifth positioning member is in contact with a part of an image side surface of the fifth lens; wherein the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side surface of the fourth positioning member and the object side surface of the fifth positioning member along the optical axis of the optical lens, and the air interval T45 of the fourth lens to the fifth lens on the optical axis satisfy the following formula: 9.0 < f4 / |CP4 + T45 - EP45 | < 122. The application solves the problem that high imaging quality and assembly stability are difficult to be considered in the prior art.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical lens assembly. Background Technology

[0002] Portable electronic products such as mobile phones, cameras, and tablets are rapidly evolving in specifications, and their key components, particularly optical lens assemblies, are becoming increasingly diverse. The pursuit is not only for thinness and good image quality, but also for small focal lengths combined with a wider field of view to meet zoom requirements. However, existing optical lens assemblies with small focal lengths and wider field of view are not only long and heavy, but also have poor image quality, failing to meet market demands. However, designing optical lens assemblies is not simply a matter of scaling down high-quality assemblies. To create optical lens assemblies that combine image quality and miniaturization, it is necessary not only to control aberrations by carefully designing the lens shape, the thickness and inner / outer diameter of the positioning components, and the spacing between the lens and positioning components to meet miniaturization requirements, but also to consider practical production issues such as material properties, manufacturing processes, and assembly yield. In the rear optical lens assembly, the lenses and positioning components play a crucial role in correcting aberrations in the front lens and large field-of-view aberrations. The lens shape is often designed to its limits, making manufacturing difficult. Furthermore, the large thickness of the rear lens edge and the relatively thick positioning components are detrimental to the miniaturization of optical lens assemblies, while thinner positioning components are at greater risk of wobbling or deformation during assembly. Therefore, controlling the rear lens and positioning components of optical lens assemblies to meet processing requirements while satisfying high image quality and miniaturization, and ensuring the stability of the assembly process, has always been a goal of continuous improvement in the industry. Summary of the Invention

[0003] The main objective of this invention is to provide an optical lens assembly that solves the problem of balancing high imaging quality and assembly stability in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, an optical lens assembly is provided, comprising: a lens barrel; a first to a fifth lens sequentially disposed within the lens barrel from the object side to the image side of the optical lens assembly, wherein the fourth lens has positive optical power; at least five positioning members, wherein the fourth positioning member is in contact with the image-side surface of the fourth lens, and the fifth positioning member is in contact with the image-side surface of the fifth lens; wherein the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image-side surface of the fourth positioning member and the object-side surface of the fifth positioning member along the optical axis of the optical lens assembly, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy: 9.0 <f4 / |CP4+T45-EP45|<122。

[0005] Furthermore, the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image-side surface of the fourth positioning member and the object-side surface of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following condition: 9.0 <f4 / |CP4+T45-EP45|<40。

[0006] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the third lens is the third positioning component. The effective focal length f4 of the fourth lens, the distance EP34 between the image-side surface of the third positioning component and the object-side surface of the fourth positioning component along the optical axis, and the air gap T34 between the third and fourth lenses along the optical axis satisfy the following condition: 8.0 <f4 / (EP34-T34)<35。

[0007] Furthermore, the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: -170° <f5 / |CP4+EP45-T45|<-5.0。

[0008] Furthermore, the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: -45 <f5 / |CP4+EP45-T45|<-5.0。

[0009] Furthermore, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side of the fourth positioning member, and the outer diameter D4m of the image side of the fourth positioning member satisfy the following condition: 0.4≤(f4+f5) / (D4m-d4s)<1.2.

[0010] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the first lens is the first positioning component. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning component, and the outer diameter D1m of the image-side surface of the first positioning component satisfy the following relationship: -10 <f1*f2 / (D1m 2 -d1s 2 )<-1.5.

[0011] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the second lens is the second positioning component. The F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning component, the outer diameter D2m of the image-side surface of the second positioning component, and the inner diameter d2m of the image-side surface of the second positioning component satisfy the following relationship: 0.5 <Fno*((D2m-d2m) / d2s)<4.5。

[0012] Furthermore, among the multiple positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element, and among the multiple positioning elements, the one that contacts the image-side surface of the third lens is the third positioning element. The distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the air gap T23 between the second and third lenses along the optical axis, and the refractive index N2 of the second lens satisfy the following condition: 1.0 <EP23 / ((N2-1)*T23)<4.0。

[0013] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the second lens is the second positioning component, and among the multiple positioning components, the one that contacts the image-side surface of the third lens is the third positioning component. The center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the distance EP23 between the image-side surface of the second positioning component and the object-side surface of the third positioning component along the optical axis, the distance EP34 between the image-side surface of the third positioning component and the object-side surface of the fourth positioning component along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 1.5 < (CT3*N3 + CT4*N4) / (EP23 + EP34 - T34) < 3.5.

[0014] Furthermore, the air gap T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following condition: 7.0 <D0m / (T45*(N4-1)+CT5*N5)<10。

[0015] Furthermore, the outer diameter D0m of the image-side end face of the lens tube and the sum of the center thicknesses of the first to fifth lenses, ∑CT, satisfy the following condition: 3.0≤D0m / ∑CT<4.0.

[0016] Furthermore, the optical power of the first lens has the same sign as that of the fourth lens, and the object side of the first lens is convex.

[0017] Furthermore, the second lens has negative optical power, and among the multiple positioning elements, the one that contacts the image-side side of the second lens is the second positioning element, and the axial distance from the light-transmitting area of ​​the image-side side of the second lens to the object-side side of the second positioning element is positive.

[0018] According to another aspect of the present invention, an optical lens assembly is provided, comprising: a lens barrel; a first lens to a fifth lens sequentially disposed within the lens barrel from the object side to the image side of the optical lens assembly, wherein the fourth lens has positive optical power; at least five positioning members, wherein the fourth positioning member is in contact with the image-side surface of the fourth lens, and the fifth positioning member is in contact with the image-side surface of the fifth lens; wherein the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image-side surface of the fourth positioning member and the object-side surface of the fifth positioning member along the optical axis of the optical lens assembly, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: -170° <f5 / |CP4+EP45-T45|<-5.0。

[0019] Furthermore, the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: -45 <f5 / |CP4+EP45-T45|<-5.0。

[0020] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the third lens is the third positioning component. The effective focal length f4 of the fourth lens, the distance EP34 between the image-side surface of the third positioning component and the object-side surface of the fourth positioning component along the optical axis, and the air gap T34 between the third and fourth lenses along the optical axis satisfy the following condition: 8.0 <f4 / (EP34-T34)<35。

[0021] Furthermore, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side of the fourth positioning member, and the outer diameter D4m of the image side of the fourth positioning member satisfy the following condition: 0.4≤(f4+f5) / (D4m-d4s)<1.2.

[0022] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the first lens is the first positioning component. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning component, and the outer diameter D1m of the image-side surface of the first positioning component satisfy the following relationship: -10 <f1*f2 / (D1m 2 -d1s 2 )<-1.5.

[0023] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the second lens is the second positioning component. The F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning component, the outer diameter D2m of the image-side surface of the second positioning component, and the inner diameter d2m of the image-side surface of the second positioning component satisfy the following relationship: 0.5 <Fno*((D2m-d2m) / d2s)<4.5。

[0024] Furthermore, among the multiple positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element, and among the multiple positioning elements, the one that contacts the image-side surface of the third lens is the third positioning element. The distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the air gap T23 between the second and third lenses along the optical axis, and the refractive index N2 of the second lens satisfy the following condition: 1.0 <EP23 / ((N2-1)*T23)<4.0。

[0025] Furthermore, among the multiple positioning components, the one that contacts the image-side surface of the second lens is the second positioning component, and among the multiple positioning components, the one that contacts the image-side surface of the third lens is the third positioning component. The center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the distance EP23 between the image-side surface of the second positioning component and the object-side surface of the third positioning component along the optical axis, the distance EP34 between the image-side surface of the third positioning component and the object-side surface of the fourth positioning component along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 1.5 < (CT3*N3 + CT4*N4) / (EP23 + EP34 - T34) < 3.5.

[0026] Furthermore, the air gap T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following condition: 7.0 <D0m / (T45*(N4-1)+CT5*N5)<10。

[0027] Furthermore, the outer diameter D0m of the image-side end face of the lens tube and the sum of the center thicknesses of the first to fifth lenses, ∑CT, satisfy the following condition: 3.0≤D0m / ∑CT<4.0.

[0028] Furthermore, the optical power of the first lens has the same sign as that of the fourth lens, and the object side of the first lens is convex.

[0029] Furthermore, the second lens has negative optical power, and among the multiple positioning elements, the one that contacts the image-side side of the second lens is the second positioning element, and the axial distance from the light-transmitting area of ​​the image-side side of the second lens to the object-side side of the second positioning element is positive.

[0030] According to the technical solution of this invention, the optical lens assembly includes a lens barrel, a first to a fifth lens sequentially housed within the lens barrel from the object side to the image side of the optical lens assembly, and at least five positioning members, wherein the fourth lens has positive optical power; the fourth positioning member is in contact with the image side side of the fourth lens, and the fifth positioning member is in contact with the image side side of the fifth lens; wherein the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side side of the fourth positioning member and the object side side of the fifth positioning member along the optical axis of the optical lens assembly, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy: 9.0 <f4 / |CP4+T45-EP45|<122。

[0031] The five-element optical lens assembly of this application, by setting multiple positioning elements between the lenses, can intercept stray light and provide strong support for the lenses, preventing them from breaking due to concentrated stress. By designing the fourth lens to have positive optical power and controlling f4, CP4, EP45, and T45, the aberrations of the front-end optical lens assembly are controlled within the effective focal length required by the fourth lens. This helps balance aberrations, improves image quality, and makes the edge thickness ratio of the fourth and fifth lenses more reasonable. It also improves the manufacturability of the fourth positioning elements, the fourth lens, and the fifth lens, facilitating the miniaturization of the optical lens assembly while maintaining good assembly stability. Thus, the five-element optical lens assembly simultaneously possesses the advantages of miniaturization, high image quality, and high stability. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0033] Figure 1 A schematic diagram of the optical lens assembly of an optional embodiment of the present invention is shown;

[0034] Figure 2 A schematic diagram of the lens structure of the optical lens group in Example 1 of the present invention is shown;

[0035] Figure 3 A schematic diagram of the optical lens assembly of Example 1 of the present invention in a first state is shown;

[0036] Figure 4 A schematic diagram of the optical lens assembly of Example 1 of the present invention in a second state is shown;

[0037] Figure 5 A schematic diagram of the optical lens assembly of Example 1 of the present invention in a third state is shown;

[0038] Figures 6 to 9The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 1 of the present invention are shown respectively.

[0039] Figure 10 A schematic diagram of the lens structure of the optical lens group in Example 2 of the present invention is shown;

[0040] Figure 11 A schematic diagram of the optical lens assembly of Example 2 of the present invention in a first state is shown;

[0041] Figure 12 A schematic diagram of the optical lens assembly of Example 2 of the present invention in a second state is shown;

[0042] Figure 13 A schematic diagram of the optical lens assembly of Example 2 of the present invention in a third state is shown;

[0043] Figures 14 to 17 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 2 of the present invention are shown respectively.

[0044] Figure 18 A schematic diagram of the lens structure of the optical lens group in Example 3 of the present invention is shown;

[0045] Figure 19 A schematic diagram of the optical lens assembly of Example 3 of the present invention in a first state is shown;

[0046] Figure 20 A schematic diagram of the optical lens assembly of Example 3 of the present invention in a second state is shown;

[0047] Figure 21 A schematic diagram of the optical lens assembly of Example 3 of the present invention in a third state is shown;

[0048] Figures 22 to 25 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of Example 3 of the present invention are shown respectively.

[0049] The above figures include the following reference numerals:

[0050] P0, Lens tube; STO, Aperture stop; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; P1, First positioning element; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P2, Second positioning element; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; P3, Third positioning element; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; P4, Fourth positioning element; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; P5, Fifth positioning element; E6, Filter; S11, Object-side surface of the filter; S12, Image-side surface of the filter; S13, Imaging plane. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0053] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0054] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0055] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0056] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that convexity 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 location of that concaveness 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 commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens data in optical software) to determine convexity or concavity. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface; for the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0057] To address the challenge of balancing high imaging quality and assembly stability in existing technologies, this invention provides an optical lens assembly.

[0058] Example 1

[0059] like Figures 1 to 25 As shown, the optical lens assembly includes a lens barrel, a first to a fifth lens sequentially housed within the lens barrel from the object side to the image side of the optical lens assembly, and at least five positioning members, wherein the fourth lens has positive optical power; the fourth positioning member is in contact with the image-side surface of the fourth lens, and the fifth positioning member is in contact with the image-side surface of the fifth lens; wherein the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image-side surface of the fourth positioning member and the object-side surface of the fifth positioning member along the optical axis of the optical lens assembly, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy: 9.0 <f4 / |CP4+T45-EP45|<122。

[0060] The five-element optical lens assembly of this application, by setting multiple positioning elements between the lenses, can intercept stray light and provide strong support for the lenses, preventing them from breaking due to concentrated stress. By designing the fourth lens to have positive optical power and controlling f4, CP4, EP45, and T45, the aberrations of the front-end optical lens assembly are controlled within the effective focal length required by the fourth lens. This helps balance aberrations, improves image quality, and makes the edge thickness ratio of the fourth and fifth lenses more reasonable. It also improves the manufacturability of the fourth positioning elements, the fourth lens, and the fifth lens, facilitating the miniaturization of the optical lens assembly while maintaining good assembly stability. Thus, the five-element optical lens assembly simultaneously possesses the advantages of miniaturization, high image quality, and high stability.

[0061] Preferably, 9.76 ≤ f4 / |CP4+T45-EP45| ≤ 121.52; more preferably, 9.0 <f4 / |CP4+T45-EP45|<40。

[0062] In this embodiment, among the plurality of positioning members, the one that is in partial contact with the image side surface of the third lens is the third positioning member. The effective focal length f4 of the fourth lens, the distance EP34 along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy: 8.0<f4 / (EP34-T34)<35. By limiting f4 / (EP34-T34) within a reasonable range, the field curvature at the peak field of view and the outer field of view can be adjusted to the maximum extent by adjusting the effective focal length of the fourth lens and the air gap between the third lens and the fourth lens on the optical axis, so that the optical lens group can have good coma performance. The distance along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member can control the aberration of the front lenses, so that the optical lens group can meet the aberration design requirements while ensuring the assembly stability between the third positioning member and the fourth positioning member. Preferably, 8.20≤f4 / (EP34-T34)≤30.72.

[0063] In this embodiment, the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 along the optical axis of the optical lens group from the image side surface of the fourth positioning member to the object side surface of the fifth positioning member, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: -170<f5 / |CP4+EP45-T45|<-5.0. By limiting f5 / |CP4+EP45-T45| within a reasonable range, the distance along the optical axis of the optical lens group from the image side surface of the fourth positioning member to the object side surface of the fifth positioning member and the air gap between the fourth lens and the fifth lens on the optical axis can be controlled, which ensures the luminous flux, balances the lens aberration, avoids stray light generated by the effective diameter edge structure of the optical lens group, adjusts the imaging quality of the optical lens group by adjusting the air gap, and ensures that the quality of imaging light meets the requirements of the optical lens group. Preferably, -166.89≤f5 / |CP4+EP45-T45|≤-6.08. Further preferably, -45<f5 / |CP4+EP45-T45|<-5.0.

[0064] In this embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object-side surface of the fourth positioning member, and the outer diameter D4m of the image-side surface of the fourth positioning member satisfy: 0.4≤(f4+f5) / (D4m-d4s)<1.2. By limiting (f4+f5) / (D4m-d4s) within a reasonable range, the effective focal lengths of the fourth lens and the fifth lens as well as the inner and outer diameters of the fourth positioning member can be ensured, the light intensity and light input amount of the off-axis field of view can be controlled, the rationality of the structure can be guaranteed while the imaging quality is improved, the space occupied by the lenses in the lens barrel can also be reduced, which is conducive to adapting to different optical lens groups. Meanwhile, the on-axis aberration can be corrected in a matching manner, and the imaging quality of the entire optical lens group can be improved. Preferably, 0.41≤(f4+f5) / (D4m-d4s)≤1.02.

[0065] In this embodiment, among the plurality of positioning members, the one that is in partial contact with the image-side surface of the first lens is the first positioning member, and the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning member, and the outer diameter D1m of the image-side surface of the first positioning member satisfy: -10<f1*f2 / (D1m 2 -d1s 2 )<-1.5. By limiting f1*f2 / (D1m 2 -d1s 2 ) within a reasonable range, by controlling the effective focal lengths of the first lens and the second lens as well as the inner and outer diameters of the first positioning member during assembly, the consistency of the central optical axes of each lens can be effectively ensured. During the assembly of the optical lens group, the smaller the deviation of the optical axis is, the higher the imaging quality of the optical lens group will be. Preferably, -9.73≤f1*f2 / (D1m 2 -d1s 2 )≤-1.80.

[0066] In this embodiment, among the plurality of positioning members, the one that is in partial contact with the image-side surface of the second lens is the second positioning member, and the F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning member, the outer diameter D2m of the image-side surface of the second positioning member, and the inner diameter d2m of the image-side surface of the second positioning member satisfy: 0.5<Fno*((D2m-d2m) / d2s)<4.5. By limiting Fno*((D2m-d2m) / d2s) within a reasonable range, since the inner diameter and outer diameter of the third positioning member will affect the grating size of the optical lens group due to their influence on the assembly offset diameter, only by controlling the inner and outer diameters of the third positioning member can the F-number of the optical lens group be effectively ensured. Preferably, 0.73≤Fno*((D2m-d2m) / d2s)≤4.42.

[0067] In this embodiment, among the plurality of positioning members, the one in partial contact with the image side surface of the second lens is a second positioning member, and among the plurality of positioning members, the one in partial contact with the image side surface of the third lens is a third positioning member. The distance EP23 along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, the air gap T23 on the optical axis between the second lens and the third lens, and the refractive index N2 of the second lens satisfy: 1.0<EP23 / ((N2-1)*T23)<4.0. By limiting EP23 / ((N2-1)*T23) within a reasonable range, under the condition that the aperture meets the requirements of depth of field and illumination, the air gap on the optical axis between the second lens and the third lens can be changed by adjusting the refractive index of the second lens, thereby adjusting the distance along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, so that the structural space of the optical lens group can be effectively reduced. Such adjustment can provide more space for correcting on-axis and off-axis aberrations, and improve the imaging quality of the optical lens group. Preferably, 1.13≤EP23 / ((N2-1)*T23)≤3.90.

[0068] In this embodiment, among the plurality of positioning members, the one in partial contact with the image side surface of the second lens is a second positioning member, and among the plurality of positioning members, the one in partial contact with the image side surface of the third lens is a third positioning member. The center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the distance EP23 along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, the distance EP34 along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member, and the air gap T34 on the optical axis between the third lens and the fourth lens satisfy: 1.5<(CT3*N3+CT4*N4) / (EP23+EP34-T34)<3.5. By limiting (CT3*N3+CT4*N4) / (EP23+EP34-T34) within a reasonable range, and by controlling the refractive indices and center thicknesses of the third lens and the fourth lens, the distance between the positioning members along the optical axis can be adjusted to ensure that the light incoming amount of the optical lens group meets the requirements, and the structure of the optical lens group is more compact and stable. Preferably, 1.62≤(CT3*N3+CT4*N4) / (EP23+EP34-T34)≤3.21.

[0069] In this embodiment, between the air gap T45 of the fourth lens to the fifth lens on the optical axis, the central thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the inner diameter d0m of the image-side end surface of the lens barrel, the following condition is satisfied: 7.0 < D0m / (T45*(N4-1)+CT5*N5) < 10. By limiting D0m / (T45*(N4-1)+CT5*N5) within a reasonable range, the total track length (TTL) of the entire optical lens group can be ensured through controlling the refractive indices of the fourth lens and the fifth lens and the central thickness of the fifth lens. When adjusting the image-side end surface of the lens barrel, sufficient adjustment space can be obtained, and the control of the air gap between the fourth lens and the fifth lens on the optical axis ensures stable processing molding and assembly of the fifth lens during assembly. Preferably, 7.28 ≤ D0m / (T45*(N4-1)+CT5*N5) ≤ 9.51.

[0070] In this embodiment, between the outer diameter D0m of the image-side end surface of the lens barrel and the sum ∑CT of the central thicknesses of the first lens to the fifth lens, the following condition is satisfied: 3.0 ≤ D0m / ∑CT < 4.0. By limiting D0m / ∑CT within a reasonable range, under the given conditions of the optical lens group, the TTL of the optical lens group can be controlled by controlling the central thicknesses of the first lens to the fifth lens, and meanwhile, the volume of the optical lens group can be effectively controlled by controlling the outer diameter of the image-side end surface of the lens barrel and the TTL. Preferably, 3.08 ≤ D0m / ∑CT ≤ 3.90.

[0071] In this embodiment, the power of the first lens has the same sign as the power of the fourth lens, and the object-side surface of the first lens is a convex surface. By controlling both the power of the first lens and the power of the fourth lens to be positive, light with a smaller incident angle can enter each lens, reducing aberrations.

[0072] In this embodiment, the second lens has negative power. Among the plurality of positioning members, the positioning member partially in contact with the image-side surface of the second lens is the second positioning member, and the axial distances from the light-transmitting region of the image-side surface of the second lens to the object-side surface of the second positioning member are all positive. This can lengthen the effective focal length (EFL) of the entire optical lens group while ensuring the lightweight and thin design of the optical lens group.

[0073] Embodiment 2

[0074] As Figures 1 to 25As shown, the optical lens group comprises a lens barrel, a first lens to a fifth lens sequentially accommodated in the lens barrel from the object side to the image side of the optical lens group, and at least five positioning members, wherein the fourth lens has positive optical power; the fourth positioning member is in partial contact with the image side surface of the fourth lens, and the fifth positioning member is in partial contact with the image side surface of the fifth lens; wherein, between the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 along the optical axis of the optical lens group from the image side surface of the fourth positioning member to the object side surface of the fifth positioning member, and the air gap T45 between the fourth lens and the fifth lens on the optical axis, the following condition is satisfied: -170<f5 / |CP4+EP45-T45|<-5.0.

[0075] By limiting f5 / |CP4+EP45-T45| within a reasonable range, through the distance along the optical axis of the optical lens group from the image side surface of the fourth positioning member to the object side surface of the fifth positioning member and the air gap between the fourth lens and the fifth lens on the optical axis, the light flux can be ensured, the balance of lens aberration can be controlled, and stray light generated by the effective diameter edge structure of the optical lens group can be avoided. The imaging quality of the optical lens group is adjusted by adjusting the air gap, so as to ensure that the quality of imaging light meets the requirements of the optical lens group.

[0076] Preferably, between the effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 along the optical axis of the optical lens group from the image side surface of the fourth positioning member to the object side surface of the fifth positioning member, and the air gap T45 between the fourth lens and the fifth lens on the optical axis, the following condition is satisfied: -166.89≤f5 / |CP4+EP45-T45|≤-6.08. Further preferably, -45<f5 / |CP4+EP45-T45|<-5.0.

[0077] In this embodiment, among the plurality of positioning members, the third positioning member is in partial contact with the image side surface of the third lens, and between the effective focal length f4 of the fourth lens, the distance EP34 along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member, and the air gap T34 between the third lens and the fourth lens on the optical axis, the following condition is satisfied: 8.0<f4 / (EP34-T34)<35. By limiting f4 / (EP34-T34) within a reasonable range, through adjusting the effective focal length of the fourth lens and the air gap between the third lens and the fourth lens on the optical axis, the field curvature of the peak field of view and the outer field of view can be adjusted to the maximum extent, so that the optical lens group can have better coma performance. The distance along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member can control the aberration of the front lenses, so that the optical lens group can meet the aberration design while ensuring the assembly stability from the third positioning member to the fourth positioning member. Preferably, 8.20≤f4 / (EP34-T34)≤30.72.

[0078] In this embodiment, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object-side surface of the fourth positioning member, and the outer diameter D4m of the image-side surface of the fourth positioning member satisfy: 0.4≤(f4+f5) / (D4m-d4s)<1.2. By limiting (f4+f5) / (D4m-d4s) within a reasonable range, since different lenses have different curvature degrees and different shooting capabilities for near and far objects, the effective focal lengths of the fourth lens and the fifth lens as well as the inner and outer diameters of the fourth positioning member can be utilized to control the light intensity and the amount of incident light of the off-axis field of view, which ensures the rationality of the structure, improves the imaging quality, can also reduce the space occupied by the lenses in the lens barrel, is conducive to adapting to different optical lens groups, and can also perform matching correction on the on-axis aberration part, thereby improving the imaging quality of the entire optical lens group. Preferably, 0.41≤(f4+f5) / (D4m-d4s)≤1.02.

[0079] In this embodiment, among the plurality of positioning members, the one in partial contact with the image-side surface of the first lens is the first positioning member, and the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning member, and the outer diameter D1m of the image-side surface of the first positioning member satisfy: -10<f1*f2 / (D1m 2 -d1s 2 )<-1.5. By limiting f1*f2 / (D1m 2 -d1s 2 ) within a reasonable range, the consistency of the central optical axes of each lens is effectively ensured by controlling the effective focal lengths of the first lens and the second lens as well as the inner and outer diameters of the first positioning member during the assembly process. In the assembly process of the optical lens group, the smaller the deviation of the optical axis is, the higher the imaging quality of the optical lens group will be. Preferably, -9.73≤f1*f2 / (D1m 2 -d1s 2 )≤-1.80.

[0080] In this embodiment, among the plurality of positioning members, the one in partial contact with the image-side surface of the second lens is the second positioning member, and the F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning member, the outer diameter D2m of the image-side surface of the second positioning member, and the inner diameter d2m of the image-side surface of the second positioning member satisfy: 0.5<Fno*((D2m-d2m) / d2s)<4.5. By limiting Fno*((D2m-d2m) / d2s) within a reasonable range, since the inner diameter and outer diameter of the third positioning member have an influence on the offset diameter during assembly, which further affects the aperture size of the optical lens group, controlling the inner and outer diameters of the third positioning member can effectively guarantee the F-number of the optical lens group. Preferably, 0.73≤Fno*((D2m-d2m) / d2s)≤4.42.

[0081] In this embodiment, among the plurality of positioning members, the one in partial contact with the image side surface of the second lens is a second positioning member, and among the plurality of positioning members, the one in partial contact with the image side surface of the third lens is a third positioning member. The following relationship is satisfied among the spacing EP23 along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, the air spacing T23 between the second lens and the third lens on the optical axis, and the refractive index N2 of the second lens: 1.0 < EP23 / ((N2-1)*T23) < 4.0. By limiting EP23 / ((N2-1)*T23) within a reasonable range, on the premise that the depth of field and illuminance of the aperture meet the requirements, adjusting the refractive index of the second lens can change the air spacing between the second lens and the third lens on the optical axis, thereby adjusting the spacing along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, effectively reducing the structural space of the optical lens group. Such adjustment can provide more space for correcting off-axis aberrations and improve the imaging quality of the optical lens group. Preferably, 1.13 ≤ EP23 / ((N2-1)*T23) ≤ 3.90.

[0082] In this embodiment, among the plurality of positioning members, the one in partial contact with the image side surface of the second lens is a second positioning member, and among the plurality of positioning members, the one in partial contact with the image side surface of the third lens is a third positioning member. The following relationship is satisfied among the central thickness CT3 of the third lens, the central thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the spacing EP23 along the optical axis from the image side surface of the second positioning member to the object side surface of the third positioning member, the spacing EP34 along the optical axis from the image side surface of the third positioning member to the object side surface of the fourth positioning member, and the air spacing T34 between the third lens and the fourth lens on the optical axis: 1.5 < (CT3*N3+CT4*N4) / (EP23+EP34-T34) < 3.5. By limiting (CT3*N3+CT4*N4) / (EP23+EP34-T34) within a reasonable range, and controlling the refractive indices and central thicknesses of the third lens and the fourth lens, the spacing between positioning members along the optical axis can be adjusted to ensure that the light incident amount of the optical lens group meets the requirements, and the structure of the optical lens group is more compact and stable. Preferably, 1.62 ≤ (CT3*N3+CT4*N4) / (EP23+EP34-T34) ≤ 3.21.

[0083] In this embodiment, among the air gap T45 between the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel, the following condition is satisfied: 7.0 < D0m / (T45*(N4-1)+CT5*N5) < 10. By limiting D0m / (T45*(N4-1)+CT5*N5) within a reasonable range, the overall TTL of the optical lens group can be ensured by controlling the refractive indexes of the fourth lens and the fifth lens and the central thickness of the fifth lens. Sufficient adjustment space can be provided when adjusting the image-side end face of the lens barrel, and the control of the air gap between the fourth lens and the fifth lens on the optical axis ensures stable processing molding and assembly of the fifth lens during assembly. Preferably, 7.28 ≤ D0m / (T45*(N4-1)+CT5*N5) ≤ 9.51.

[0084] In this embodiment, between the outer diameter D0m of the image-side end face of the lens barrel and the sum ∑CT of the central thicknesses of the first lens to the fifth lens, the following condition is satisfied: 3.0 ≤ D0m / ∑CT < 4.0. By limiting D0m / ∑CT within a reasonable range, the TTL of the optical lens group can be controlled by controlling the central thicknesses of the first lens to the fifth lens under the established conditions of the optical lens group, and meanwhile the volume of the optical lens group can be effectively controlled by controlling the outer diameter of the image-side end face of the lens barrel and the TTL. Preferably, 3.08 ≤ D0m / ∑CT ≤ 3.90.

[0085] In this embodiment, the power of the first lens has the same sign as the power of the fourth lens, and the object-side surface of the first lens is a convex surface. By controlling both the power of the first lens and the power of the fourth lens to be positive, light with a smaller incident angle can enter each lens, thereby reducing aberrations.

[0086] In this embodiment, the second lens has negative power. Among the plurality of positioning members, the positioning member in partial contact with the image-side surface of the second lens is the second positioning member, and the axial distances from the light-transmitting area of the image-side surface of the second lens to the object-side surface of the second positioning member are all positive. This can lengthen the effective focal length EFL of the overall optical lens group while ensuring the light and thin design of the optical lens group.

[0087] It should be noted that in the present application, TTL refers to the on-axis distance from the object-side surface of the first lens to the image-side surface of the fifth lens.

[0088] Optionally, the above optical lens group may further comprise a color filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0089] The optical lens assembly in this application can employ multiple lenses, such as the five lenses mentioned above. By rationally allocating the effective focal length, surface shape, center thickness of each lens, and on-axis distance between each lens, the aperture of the optical lens assembly can be effectively increased, the sensitivity of the lens can be reduced, and the manufacturability of the lens can be improved, making the optical lens assembly more conducive to production and processing and suitable for portable electronic devices such as smartphones.

[0090] In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0091] However, those skilled in the art will understand that the number of lenses constituting the optical assembly can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although five lenses have been described as an example in the embodiments, the optical assembly is not limited to including five lenses. If necessary, the optical assembly may also include other numbers of lenses.

[0092] Figure 1 A schematic diagram of the structure of an optical lens assembly of this application is shown. Figure 1 The diagram also indicates parameters such as d2s and EP23 to clearly and intuitively explain their meaning. To better illustrate the optical lens structure and specific surface shapes, these parameters will not be shown in the accompanying diagrams when explaining specific examples later.

[0093] Where, dis refers to the inner diameter of the object-side surface of the i-th positioning element, and i is a value taken from 1, 2, 3, 4, 5. EPij refers to the distance along the optical axis between the image-side surface of the i-th positioning element and the object-side surface of the j-th positioning element, where j > i, and i is a value taken from 1, 2, 3, 4, while j is a value taken from 2, 3, 4, 5. The object-side end face of the lens barrel P0 is the surface of the lens barrel P0 closest to the object side, and the image-side end face of the lens barrel P0 is the surface of the lens barrel P0 closest to the image side. The maximum thickness CPi of the i-th positioning element refers to the maximum value of the distance along the optical axis from the object-side surface of the i-th positioning element to the image-side surface of the i-th positioning element.

[0094] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lens assemblies applicable to the above embodiments.

[0095] It should be noted that the following examples include a first state, a second state, and a third state. In the same example, the radius of curvature, center thickness, and other parameters of each lens in the optical assembly are the same across the first, second, and third states, as are the inter-lens spacing and higher-order image coefficients. However, the parameters such as the lens barrel P0, the thickness of the positioning element, the inner and outer diameters of the positioning element, and the distance between the positioning elements differ, as do the shapes of some lenses. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0096] It should be noted that any of the examples one through three below are applicable to all embodiments of this application.

[0097] Example 1

[0098] like Figures 2 to 9 As shown, an optical lens assembly of Example 1 of this application is described. Figure 2 A schematic diagram of the lens structure of the optical lens group is shown. Figure 3 A schematic diagram of the optical lens assembly in Example 1 in its first state is shown. Figure 4 A schematic diagram of the optical lens assembly in Example 1 in the second state is shown. Figure 5 A schematic diagram of the optical lens assembly in Example 1 in the third state is shown.

[0099] like Figures 3 to 5 As shown, the optical lens group includes, in sequence from the object side to the image side: first lens E1, first positioning element P1, second lens E2, second positioning element P2, third lens E3, third positioning element P3, fourth lens E4, fourth positioning element P4, fifth lens E5, and fifth positioning element P5.

[0100] exist Figure 3 In this system, all positioning components are in direct contact with the lens. The second positioning component has the smallest inner diameter to block stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The third positioning component has the largest thickness of all the positioning components, and the fifth positioning component also helps to fix the last lens, preventing lens movement.

[0101] like Figure 4 As shown, lenses E1 to E3 are sequentially fastened together, with positioning elements located inside the fastening structure. The remaining positioning elements are in direct contact with the lenses. The second positioning element has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The third positioning element has the largest thickness of all positioning elements, providing stable support at the large gap between the edges of the second and third lenses. The fifth positioning element also helps to fix the last lens, preventing lens movement.

[0102] like Figure 5As shown, all positioning components are in direct contact with the lenses. The second positioning component has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The third positioning component has the largest thickness of all the positioning components, providing stable support at the large gap between the edges of the second and third lenses. The fifth positioning component also helps to fix the last lens, preventing lens movement.

[0103] The aperture STO is located on the object side of the first lens. The object-side surface S1 of the first lens is convex, and the image-side surface S2 is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 is concave. The object-side surface S5 of the third lens is concave, and the image-side surface S6 is convex. The object-side surface S7 of the fourth lens is concave, and the image-side surface S8 is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 is concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging surface S13.

[0104] Table 1 shows the basic structural parameters of the optical lens assembly in Example 1, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0105]

[0106]

[0107] Table 1

[0108] In Example 1, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0109]

[0110] Where x is the distance vector from the vertex of the aspherical surface at a height 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 reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for the aspherical mirrors S1-S10 in Example 1.

[0111] S1 -8.1039E-03 1.8066E-01 -1.3352E+00 5.9030E+00 -1.6120E+01 2.7532E+01 -2.8907E+01 1.7052E+01 -4.3604E+00 S2 -1.8218E-01 2.1965E-01 -9.2185E-01 5.6892E+00 -1.9260E+01 3.7362E+01 -4.2887E+01 2.7319E+01 -7.5245E+00 S3 -1.8224E-01 4.2013E-01 -1.8791E+00 1.4487E+01 -6.0152E+01 1.4114E+02 -1.9148E+02 1.4072E+02 -4.3457E+01 S4 -5.5119E-02 4.7105E-01 -1.5957E+00 7.3426E+00 -1.8412E+01 1.9053E+01 7.0952E+00 -2.9593E+01 1.6739E+01 S5 -1.9798E-01 -4.4051E-01 3.7108E+00 -2.0085E+01 6.6634E+01 -1.3963E+02 1.7953E+02 -1.3011E+02 4.1202E+01 S6 -1.8453E-01 -4.7418E-02 -1.1971E-02 2.9317E-01 -1.7105E+00 4.1024E+00 -5.0103E+00 3.0339E+00 -6.9869E-01 S7 5.0474E-02 -1.8612E-01 5.0142E-01 -8.2124E-01 8.0533E-01 -5.0918E-01 2.0136E-01 -4.4351E-02 4.0981E-03 S8 1.0245E-01 -1.9641E-01 4.4203E-01 -4.8146E-01 2.8919E-01 -1.0390E-01 2.2438E-02 -2.6982E-03 1.3907E-04 S9 -1.6803E-01 2.0808E-01 -1.6194E-01 9.5723E-02 -3.7301E-02 9.0424E-03 -1.3129E-03 1.0477E-04 -3.5408E-06 S10 -2.6205E-01 2.3802E-01 -1.6538E-01 7.8167E-02 -2.4642E-02 5.0585E-03 -6.4523E-04 4.6175E-05 -1.4095E-06

[0112] Table 2

[0113] Figure 6The on-axis chromatic aberration curve of the optical lens group in Example 1 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens group. Figure 7 The astigmatism curves of the optical lens group in Example 1 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 8 The distortion curves of the optical lens group in Example 1 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 9 The magnification chromatic aberration curve of the optical lens group in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens group.

[0114] according to Figures 6 to 9 As can be seen, the optical lens group given in Example 1 can achieve good imaging quality.

[0115] Example 2

[0116] like Figures 10 to 17 As shown, the optical lens assembly of Example 2 of this application is described. Figure 10 A schematic diagram of the lens structure of the optical lens group is shown. Figure 11 A schematic diagram of the optical lens assembly in Example 2 in its first state is shown. Figure 12 A schematic diagram of the optical lens assembly in Example 2 in the second state is shown. Figure 13 A schematic diagram of the optical lens assembly of Example 2 in the third state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0117] like Figures 11 to 13 As shown, the optical lens group includes, in sequence from the object side to the image side: first lens E1, first positioning element P1, second lens E2, second positioning element P2, third lens E3, third positioning element P3, fourth lens E4, fourth positioning element P4, fifth lens E5, and fifth positioning element P5.

[0118] exist Figure 11 In this configuration, all positioning components are in direct contact with the lens. The second positioning component has the smallest inner diameter to block stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The fifth positioning component also serves to fix the last lens, preventing it from shifting.

[0119] exist Figure 12 In this assembly, lenses E1 through E3 are sequentially fastened together. The first and second positioning elements are located inside the fastening structure, while the remaining positioning elements are in direct contact with the lenses. The second positioning element has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The fourth positioning element has the largest thickness to ensure the stability of the assembly with a large gap between the fourth and fifth lenses. The fifth positioning element also serves to fix the last lens, preventing lens movement.

[0120] exist Figure 13 In this configuration, the second lens E2 and the third lens E3 are interlocked. The second positioning component is located inside the interlocking structure, while the remaining positioning components are in direct contact with the lenses. The second positioning component has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The third positioning component has the largest thickness to ensure the assembly stability of the third and fourth lenses at large intervals. The fifth positioning component also serves to fix the last lens, preventing lens movement.

[0121] The aperture STO is located on the object side of the first lens. The object-side surface S1 of the first lens is convex, and the image-side surface S2 is concave. The object-side surface S3 of the second lens is convex, and the image-side surface S4 is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 is concave. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 is convex. The object-side surface S9 of the fifth lens is concave, and the image-side surface S10 is concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through surfaces S1 to S12 and is finally imaged onto the imaging surface S13.

[0122] Table 3 shows the basic structural parameters of the optical lens assembly in Example 2, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0123] OBJ spherical endless endless STO spherical endless -0.3201 S1 aspherical 1.3138 0.6178 1.5490 63.6100 0.0044 S2 aspherical 4.5621 0.0697 -0.0685 S3 aspherical 56.4310 0.2200 1.7120 30.6000 49.0614 S4 aspherical 5.7156 0.3585 0.3494 S5 aspherical 163.5990 0.3314 1.5500 50.9600 -46.8246 S6 aspherical 87.6388 0.4149 -47.2120 S7 aspherical 74.1162 0.6068 1.5890 42.7200 -87.3884 S8 aspherical -2.2024 0.5313 -2.3036 S9 aspherical -2.4230 0.3088 1.5290 66.4200 -0.0013 S10 aspherical 2.6496 0.3082 -1.0602 S11 spherical endless 0.2100 1.5180 64.1700 S12 spherical endless 0.3826 S13 spherical endless

[0124] Table 3

[0125] Table 4 gives the higher-order coefficients of S1-S10 that can be used for each aspherical lens in Example 2. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0126] S1 2.2408E-02 -3.8077E-01 3.1484E+00 -1.4313E+01 3.9031E+01 -6.5377E+01 6.5773E+01 -3.6509E+01 8.5729E+00 S2 -1.3669E-01 -6.9833E-02 1.1764E+00 -4.8253E+00 1.3087E+01 -2.4005E+01 2.7353E+01 -1.7213E+01 4.5113E+00 S3 -1.4337E-01 3.6041E-01 -6.5376E-01 5.1517E+00 -2.4472E+01 6.2968E+01 -9.1979E+01 7.2327E+01 -2.3790E+01 S4 -2.3356E-03 1.6534E-01 1.3073E+00 -7.2862E+00 2.4069E+01 -5.4609E+01 8.2979E+01 -7.4167E+01 2.9667E+01 S5 -2.7964E-01 2.3866E-02 1.1812E+00 -1.1704E+01 5.0722E+01 -1.2799E+02 1.9055E+02 -1.5618E+02 5.4751E+01 S6 -1.9893E-01 1.8619E-02 -9.1814E-01 4.4562E+00 -1.1374E+01 1.6900E+01 -1.4752E+01 6.9978E+00 -1.3646E+00 S7 -1.7084E-02 2.9977E-02 -2.5925E-01 5.4736E-01 -6.0410E-01 3.8351E-01 -1.4156E-01 2.8486E-02 -2.4299E-03 S8 6.0306E-02 -9.5698E-02 1.2878E-01 -6.2762E-02 2.9288E-03 8.3113E-03 -3.2897E-03 5.2459E-04 -3.1624E-05 S9 -1.3073E-01 3.1844E-02 7.0453E-02 -5.6734E-02 2.1245E-02 -4.7107E-03 6.3916E-04 -4.9592E-05 1.7055E-06 S10 -2.1769E-01 1.2962E-01 -4.8051E-02 7.5023E-03 1.0835E-03 -7.0830E-04 1.2884E-04 -1.0553E-05 3.2720E-07

[0127] Table 4

[0128] Figure 14 The on-axis chromatic aberration curve of the optical lens group in Example 2 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens group. Figure 15 The astigmatism curves of the optical lens group in Example 2 are shown, which represent the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 16 The distortion curves of the optical lens group in Example 2 are shown, which represent the distortion magnitude values ​​corresponding to different field of view angles. Figure 17 The magnification chromatic aberration curve of the optical lens group in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens group.

[0129] according to Figures 14 to 17As can be seen, the optical lens group given in Example 2 can achieve good imaging quality.

[0130] Example 3

[0131] like Figures 18 to 25 As shown, the optical lens assembly of Example 3 of this application is described. Figure 18 A schematic diagram of the lens structure of the optical lens group is shown. Figure 19 A schematic diagram of the optical lens assembly in Example 3 in its first state is shown. Figure 20 A schematic diagram of the optical lens assembly in Example 3 in the second state is shown. Figure 21 A schematic diagram of the optical lens assembly in Example 3 in its third state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0132] like Figures 19 to 22 As shown, the optical lens group includes, in sequence from the object side to the image side: first lens E1, first positioning element P1, second lens E2, second positioning element P2, third lens E3, third positioning element P3, fourth lens E4, fourth positioning element P4, fifth lens E5, and fifth positioning element P5.

[0133] exist Figure 19 In this configuration, all positioning components are in direct contact with the lens. The second positioning component has the smallest inner diameter to block stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The fifth positioning component has the largest thickness of all the positioning components and also serves to fix the last lens, preventing lens movement.

[0134] like Figure 20 As shown, the first lens E1 to the third lens E3 are sequentially fastened together, with positioning components located inside the fastening structure. The remaining positioning components are in direct contact with the lenses. The second positioning component has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The fifth positioning component also serves to fix the last lens, preventing lens movement.

[0135] like Figure 21 As shown, the first lens E1 and the second lens E2 are fastened together. The first positioning element is located inside the fastening structure, while the remaining positioning elements are in direct contact with the lenses. The second positioning element has the smallest inner diameter to intercept stray light from both sides, ensuring image quality without affecting the amount of light entering the lens. The fifth positioning element also serves to fix the last lens, preventing lens movement.

[0136] The aperture STO is located on the object side of the first lens. The object-side surface S1 of the first lens is convex, and the image-side surface S2 of the first lens is concave. The object-side surface S3 of the second lens is concave, and the image-side surface S4 of the second lens is concave. The object-side surface S5 of the third lens is convex, and the image-side surface S6 of the third lens is convex. The object-side surface S7 of the fourth lens is convex, and the image-side surface S8 of the fourth lens is convex. The object-side surface S9 of the fifth lens is convex, and the image-side surface S10 of the fifth lens is concave. The filter E6 has an object-side surface S11 and an image-side surface S12. Light from the object passes sequentially through each surface S1 to S12 and is finally imaged on the imaging surface S13.

[0137] Table 5 shows the basic structural parameters of the optical lens assembly in Example 3, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0138] OBJ spherical endless endless STO spherical endless -0.2417 S1 aspherical 1.3875 0.4800 1.5520 56.0500 -0.2692 S2 aspherical 4.4579 0.1910 22.4307 S3 aspherical -1470.0070 0.2567 1.7030 19.2700 98.0000 S4 aspherical 6.2885 0.2000 -33.3664 S5 aspherical 9.0023 0.4900 1.5520 56.0500 -98.0000 S6 aspherical -13.8691 0.3840 -96.9635 S7 aspherical 7.0392 0.4500 1.5520 56.0500 -15.9382 S8 aspherical -3.2393 0.4514 -2.2516 S9 aspherical 10.7196 0.4114 1.5430 55.6600 20.2844 S10 aspherical 1.0784 0.2774 -7.7235 S11 spherical endless 0.2100 1.5240 64.2300 S12 spherical endless 0.1681 S13 spherical endless

[0139] Table 5

[0140] Table 6 gives the higher-order coefficients of S1-S10 that can be used for each aspherical lens in Example 3. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0141]

[0142]

[0143] Table 6

[0144] Figure 22 The on-axis chromatic aberration curve of the optical lens group in Example 3 is shown, which indicates the deviation of the focal point of light of different wavelengths after passing through the optical lens group. Figure 23 The astigmatism curves of the optical lens group in Example 3 are shown, which represent the curvature of the meridional image plane and the curvature of the sagittal image plane. Figure 24 The distortion curves of the optical lens group in Example 3 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 25 The magnification chromatic aberration curve of the optical lens group in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens group.

[0145] according to Figures 22 to 25 As can be seen, the optical lens group given in Example 3 can achieve good imaging quality.

[0146] In summary, Examples 1 to 3 satisfy the relationships shown in Table 7.

[0147] f4 / |CP4+T45-EP45| 17.62 14.22 15.01 37.33 9.76 121.52 17.26 12.80 16.50 f4 / (EP34-T34) 19.53 29.06 30.72 8.20 11.44 20.65 17.13 28.24 18.03 f5 / |CP4+EP45-T45| -16.12 -27.55 -13.49 -43.70 -29.51 -166.89 -7.99 -6.08 -7.69 (f4+f5) / (D4m-d4s) 0.44 0.47 0.41 0.63 0.90 0.79 0.80 0.74 1.02 f1*f2 / (D1m2-d1s2) -1.80 -4.59 -2.08 -3.85 -8.98 -2.26 -3.15 -9.73 -9.39 Fno*((D2m-d2m) / d2s) 3.79 1.82 4.42 3.91 0.89 1.30 2.89 0.73 2.90 EP23 / ((N2-1)*T23) 1.54 1.70 1.13 1.84 1.72 1.66 3.84 3.80 3.90 (CT3*N3+CT4*N4) / (EP23+EP34-T34) 2.27 2.32 3.21 1.62 1.95 2.47 1.88 2.15 1.88 D0m / (T45*(N4-1)+CT5*N5) 9.34 9.47 9.51 9.38 8.22 8.51 7.91 7.72 7.28 D0m / ∑CT 3.83 3.89 3.90 3.53 3.10 3.20 3.35 3.27 3.08

[0148] Table 7

[0149] Table 8 provides some parameters of the optical lens groups in Examples 1 to 3.

[0150] d1s 1.7004 1.7328 1.7138 1.732 1.7179 1.7895 1.6415 1.6456 1.7177 D1m 4.3147 3.0278 4.0687 3.2118 2.4668 3.9554 3.5326 2.4233 2.4954 d2s 1.6679 1.5825 1.6258 1.6065 1.5796 1.6963 1.7602 1.7604 1.842 d2m 1.7923 1.6534 1.7686 1.7141 1.632 1.6151 1.8399 1.8682 1.7911 D2m 4.7602 3.0105 5.1482 4.7069 2.3032 2.6657 4.4914 2.5394 4.5708 d4s 4.1691 4.3983 4.1691 4.2674 4.2412 4.072 3.7661 3.7046 3.8822 D4m 6.26 6.3475 6.4285 6.3244 5.6785 5.7212 6.0765 6.1847 5.6895 D0m 7.0957 7.1933 7.2256 7.3635 6.4552 6.6788 6.9956 6.8276 6.4385 EP23 0.4123 0.4542 0.3025 0.4707 0.4388 0.4228 0.5397 0.5349 0.5487 EP34 0.6542 0.5998 0.5938 0.8592 0.7332 0.5913 0.6222 0.5285 0.6103 CP4 0.02 0.0718 0.022 0.022 0.2262 0.022 0.022 0.025 0.022 EP45 0.4676 0.4754 0.4376 0.4557 0.3844 0.5233 0.7097 0.795 0.7206

[0151] Table 8

[0152] It should be noted that in Tables 7 and 8, 1-1 represents the first state of the optical lens assembly in Example 1, 1-2 represents the second state of the optical lens assembly in Example 1, and 1-3 represents the third state of the optical lens assembly in Example 1. Similarly, 2-1 represents the first state of the optical lens assembly in Example 2, 2-2 represents the second state of the optical lens assembly in Example 2, 2-3 represents the third state of the optical lens assembly in Example 2, 3-1 represents the first state of the optical lens assembly in Example 3, 3-2 represents the second state of the optical lens assembly in Example 3, and 3-3 represents the third state of the optical lens assembly in Example 3.

[0153] Table 9 shows the effective focal lengths of the first to fifth lenses of the optical lens groups in Examples 1 to 3.

[0154] f1(mm) 3.38 3.15 3.46 f2 (mm) -8.39 -8.95 -8.91 f3 (mm) 62.28 -343.72 9.96 f4 (mm) 3.24 3.64 4.08 f5 (mm) -2.32 -2.34 -2.24 f(mm) 3.81 3.88 3.10 Fno 2.13 2.10 1.92

[0155] Table 9

[0156] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens group described above.

[0157] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0158] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0159] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0160] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens assembly, characterized in that, include: Lens tube; The first lens to the fifth lens are sequentially housed in the lens barrel from the object side to the image side of the optical lens group, wherein the first lens has positive optical power, the second lens has negative optical power, the fourth lens has positive optical power, and the fifth lens has negative optical power. The object side of the first lens is convex, and the image side of the fifth lens is concave. At least five positioning elements, wherein the element that contacts the image-side side portion of the fourth lens is the fourth positioning element, and the element that contacts the image-side side portion of the fifth lens is the fifth positioning element; Wherein, the effective focal length f4 of the fourth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: 9.76≤f4 / |CP4+T45-EP45|≤121.52; The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side of the fourth positioning member, and the outer diameter D4m of the image side of the fourth positioning member satisfy the following condition: 0.41≤(f4+f5) / (D4m-d4s)≤1.

02.

2. The optical lens assembly according to claim 1, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the third lens is the third positioning element. The effective focal length f4 of the fourth lens, the distance EP34 between the image-side surface of the third positioning element and the object-side surface of the fourth positioning element along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 8.20≤f4 / (EP34-T34)≤30.

72.

3. The optical lens assembly according to claim 1, characterized in that, The effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: -166.89≤f5 / |CP4+EP45-T45|≤-6.

08.

4. The optical lens assembly according to claim 1, characterized in that, Of the plurality of positioning elements, the one that contacts the image-side surface of the first lens is the first positioning element. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning element, and the outer diameter D1m of the image-side surface of the first positioning element satisfy the following condition: -9.73 ≤ f1 * f2 / (D1m) 2 -d1s 2 )≤-1.

80.

5. The optical lens assembly according to claim 1, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element. The F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning element, the outer diameter D2m of the image-side surface of the second positioning element, and the inner diameter d2m of the image-side surface of the second positioning element satisfy the following: 0.73≤Fno*((D2m-d2m) / d2s)≤4.

42.

6. The optical lens assembly according to claim 1, characterized in that, The positioning element that contacts the image-side surface of the second lens is the second positioning element, and the positioning element that contacts the image-side surface of the third lens is the third positioning element. The distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the refractive index N2 of the second lens satisfy the following: 1.13≤EP23 / ((N2-1)*T23)≤3.

90.

7. The optical lens assembly according to any one of claims 1 to 6, characterized in that, The positioning element that contacts the image-side surface of the second lens is the second positioning element, and the positioning element that contacts the image-side surface of the third lens is the third positioning element. The center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the distance EP34 between the image-side surface of the third positioning element and the object-side surface of the fourth positioning element along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 1.62≤(CT3*N3+CT4*N4) / (EP23+EP34-T34)≤3.

21.

8. The optical lens assembly according to any one of claims 1 to 6, characterized in that, The air gap T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the outer diameter D0m of the image-side end face of the lens barrel satisfy the following condition: 7.28≤D0m / (T45*(N4-1)+CT5*N5)≤9.

51.

9. The optical lens assembly according to any one of claims 1 to 6, characterized in that, The outer diameter D0m of the image-side end face of the lens barrel and the sum of the center thicknesses ∑CT of the first lens to the fifth lens satisfy the following condition: 3.0≤D0m / ∑CT≤3.

9.

10. The optical lens assembly according to any one of claims 1 to 6, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element, and the axial distance from the light-transmitting area of ​​the image-side surface of the second lens to the object-side surface of the second positioning element is positive.

11. An optical lens assembly, characterized in that, include: Lens tube; The first lens to the fifth lens are sequentially housed in the lens barrel from the object side to the image side of the optical lens group, wherein the first lens has positive optical power, the second lens has negative optical power, the fourth lens has positive optical power, and the fifth lens has negative optical power. The object side of the first lens is convex, and the image side of the fifth lens is concave. At least five positioning elements, wherein the element that contacts the image-side side portion of the fourth lens is the fourth positioning element, and the element that contacts the image-side side portion of the fifth lens is the fifth positioning element; The effective focal length f5 of the fifth lens, the maximum thickness CP4 of the fourth positioning member, the distance EP45 between the image side of the fourth positioning member and the object side of the fifth positioning member along the optical axis of the optical lens group, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy the following: -166.89≤f5 / |CP4+EP45-T45|≤-6.08; The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side of the fourth positioning member, and the outer diameter D4m of the image side of the fourth positioning member satisfy the following condition: 0.41≤(f4+f5) / (D4m-d4s)≤1.

02.

12. The optical lens assembly according to claim 11, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the third lens is the third positioning element. The effective focal length f4 of the fourth lens, the distance EP34 between the image-side surface of the third positioning element and the object-side surface of the fourth positioning element along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 8.20≤f4 / (EP34-T34)≤30.

72.

13. The optical lens assembly according to claim 11, characterized in that, Of the plurality of positioning elements, the one that contacts the image-side surface of the first lens is the first positioning element. The effective focal length f1 of the first lens, the effective focal length f2 of the second lens, the inner diameter d1s of the object-side surface of the first positioning element, and the outer diameter D1m of the image-side surface of the first positioning element satisfy the following condition: -9.73 ≤ f1 * f2 / (D1m) 2 -d1s 2 )≤-1.

80.

14. The optical lens assembly according to claim 11, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element. The F-number Fno of the optical lens group, the inner diameter d2s of the object-side surface of the second positioning element, the outer diameter D2m of the image-side surface of the second positioning element, and the inner diameter d2m of the image-side surface of the second positioning element satisfy the following: 0.73≤Fno*((D2m-d2m) / d2s)≤4.

42.

15. The optical lens assembly according to claim 11, characterized in that, The positioning element that contacts the image-side surface of the second lens is the second positioning element, and the positioning element that contacts the image-side surface of the third lens is the third positioning element. The distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the refractive index N2 of the second lens satisfy the following: 1.13≤EP23 / ((N2-1)*T23)≤3.

90.

16. The optical lens assembly according to any one of claims 11 to 15, characterized in that, The positioning element that contacts the image-side surface of the second lens is the second positioning element, and the positioning element that contacts the image-side surface of the third lens is the third positioning element. The center thickness CT3 of the third lens, the center thickness CT4 of the fourth lens, the refractive index N3 of the third lens, the refractive index N4 of the fourth lens, the distance EP23 between the image-side surface of the second positioning element and the object-side surface of the third positioning element along the optical axis, the distance EP34 between the image-side surface of the third positioning element and the object-side surface of the fourth positioning element along the optical axis, and the air gap T34 between the third lens and the fourth lens on the optical axis satisfy the following: 1.62≤(CT3*N3+CT4*N4) / (EP23+EP34-T34)≤3.

21.

17. The optical lens assembly according to any one of claims 11 to 15, characterized in that, The air gap T45 between the fourth and fifth lenses on the optical axis, the center thickness CT5 of the fifth lens, the refractive index N4 of the fourth lens, the refractive index N5 of the fifth lens, and the inner diameter d0m of the image-side end face of the lens barrel satisfy the following condition: 7.28≤D0m / (T45*(N4-1)+CT5*N5)≤9.

51.

18. The optical lens assembly according to any one of claims 11 to 15, characterized in that, The outer diameter D0m of the image-side end face of the lens barrel and the sum of the center thicknesses ∑CT of the first lens to the fifth lens satisfy the following condition: 3.0≤D0m / ∑CT≤3.

9.

19. The optical lens assembly according to any one of claims 11 to 15, characterized in that, Among the plurality of positioning elements, the one that contacts the image-side surface of the second lens is the second positioning element, and the axial distance from the light-transmitting area of ​​the image-side surface of the second lens to the object-side surface of the second positioning element is positive.

Images