Optical lens assembly

Abstract

The application provides an optical lens assembly, which comprises a first assembly and a second assembly. The first assembly comprises a first lens, a second lens and a third lens. The first lens has positive refractive power, the second lens has negative refractive power, and the third lens has positive refractive power. The second assembly comprises a fourth lens, a fifth lens and a sixth lens. The fourth lens has negative refractive power, the fifth lens has positive refractive power, and the sixth lens has negative refractive power. The distance between the first assembly and the second assembly is variable. The combined focal length f123 of the first lens, the second lens and the third lens, the central thickness CT1 of the first lens, the central thickness CT2 of the second lens and the central thickness CT3 of the third lens satisfy the following relationship: 1.5 < f123 / (CT1+CT2+CT3) < 3.0. The combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, the central thickness CT4 of the fourth lens, the central thickness CT5 of the fifth lens and the central thickness CT6 of the sixth lens satisfy the following relationship: -8.5 < f456 / (CT4+CT5+CT6) < -6.0. The application solves the problems of difficult focusing and blurred imaging of the optical lens assembly in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging device, in particular to an optical lens. BACKGROUND

[0002] With the rapid development of intelligent electronic products, users have higher and higher requirements for the shooting quality of electronic products. As a key element for obtaining images in electronic products, optical lens has become an indispensable part. For example, there are long-focus, wide-angle, large-image optical lenses on smart phones to meet the different shooting requirements of users. However, the image plane of the zoom optical lens moves during zooming, resulting in slow focusing, imaging blur and high power consumption. That is, how to design the focal length distribution and lens shape of the optical lens to improve the focusing speed and imaging clarity under the premise of miniaturization is a very important problem. SUMMARY

[0003] The main purpose of the present application is to provide an optical lens to solve the problem of difficult focusing and imaging blur of the optical lens in the prior art.

[0004] In order to achieve the above object, according to one aspect of the present application, an optical lens assembly is provided, the optical lens assembly has six lens pieces with optical power, the six lens pieces are all plastic aspheric lens pieces, there is an air gap between any two adjacent lens pieces, the optical lens assembly comprises a first assembly and a second assembly, the first assembly sequentially comprises a first lens to a third lens from an object side to an image side of the optical lens assembly, the first lens has positive optical power, an object side surface of the first lens is a convex surface, an image side surface of the first lens is a concave surface, the second lens has negative optical power, an object side surface of the second lens is a convex surface, an image side surface of the second lens is a concave surface, the third lens has positive optical power, an object side surface of the third lens is a convex surface, an image side surface of the third lens is a convex surface; the second assembly sequentially comprises a fourth lens to a sixth lens from the object side to the image side of the optical lens assembly, the fourth lens has negative optical power, an object side surface of the fourth lens is a concave surface, an image side surface of the fourth lens is a convex surface, the fifth lens has positive optical power, an object side surface of the fifth lens is a convex surface, an image side surface of the fifth lens is a concave surface, the sixth lens has negative optical power, an object side surface of the sixth lens is a concave surface, an image side surface of the sixth lens is a convex surface, and neither the object side surface of the sixth lens nor the image side surface of the sixth lens has an inflection point; wherein a distance between the first assembly and the second assembly on an optical axis of the optical lens assembly is variable; a combination focal length f123 of the first lens, the second lens and the third lens, a central thickness CT1 of the first lens on the optical axis, a central thickness CT2 of the second lens on the optical axis and a central thickness CT3 of the third lens on the optical axis satisfy: 1.5 < f123 / (CT1+CT2+CT3) < 3.0; a combination focal length f456 of the fourth lens, the fifth lens and the sixth lens, a central thickness CT4 of the fourth lens on the optical axis, a central thickness CT5 of the fifth lens on the optical axis and a central thickness CT6 of the sixth lens on the optical axis satisfy: -8.5 < f456 / (CT4+CT5+CT6) < -6.0.

[0005] According to another aspect of the present application, an optical lens assembly is provided, which has six lenses with positive optical power, all of which are plastic aspheric lenses, and has air gaps between any two adjacent lenses, and comprises a first assembly and a second assembly, wherein the first assembly sequentially comprises a first lens to a third lens from the object side to the image side of the optical lens assembly, the first lens has positive optical power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave, the second lens has negative optical power, the object side surface of the second lens is convex, and the image side surface of the second lens is concave, the third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex; the second assembly sequentially comprises a fourth lens to a sixth lens from the object side to the image side of the optical lens assembly, the fourth lens has negative optical power, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex, the fifth lens has positive optical power, the object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave, the sixth lens has negative optical power, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is convex, and neither the object side surface of the sixth lens nor the image side surface of the sixth lens has a turning point; wherein the sum of the central thicknesses of the six lenses on the optical axis ∑CT, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT1 of the first lens on the optical axis satisfy: 1.5 < ∑CT / (CT3+CT1) < 2.0; and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis satisfy: -8.5 < f456 / (CT4+CT5+CT6) < -6.0. The present application provides a six-lens variable optical lens assembly comprising two assemblies, but the variable optical lens assembly is prone to the problems of slow focusing caused by image plane movement and unclear imaging. By reasonably matching the positive and negative optical powers of the lenses, the optical power is evenly distributed to each assembly and each lens, ensuring that the quality of the entire optical lens assembly is uniform and stable, avoiding the problems of aberration, and achieving high imaging quality, easy processing and other characteristics. The object side and the image side of the sixth lens do not have a turning point, which can ensure good sensitivity. At the same time, by controlling the combined focal length of the first assembly and the second assembly and the ratio of the thickness of the internal lenses, the focal length of each lens assembly can be distributed, and the front and rear lenses can be better connected, while meeting the continuous zooming capability of the optical lens assembly and having a large focal length change, thereby improving the imaging clarity.

[0006] Further, the effective focal length f1 of the first lens, the curvature radius R1 of the object side surface of the first lens, and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 9.0 < f1 / R1 + f1 / DT11 ≤ 14.0.

[0007] Further, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.5 < |f2*N2 / (R3+R4)| < 2.0.

[0008] Further, the effective focal length f3 of the third lens, the curvature radius R6 of the image side surface of the third lens, the effective focal length f4 of the fourth lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -7.0 < f3 / R6-f4 / R7 < -4.5.

[0009] Further, the sum ∑CT of the central thicknesses on the optical axis of the six lenses, the central thickness CT3 on the optical axis of the third lens, and the central thickness CT1 on the optical axis of the first lens satisfy: 1.5 < ∑CT / (CT3+CT1) < 2.0.

[0010] Further, the central thickness CT4 on the optical axis of the fourth lens, the air separation T45 on the optical axis of the fourth lens and the fifth lens, and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens satisfy: 1.0 < (CT4+T45) / SAG42 < 2.5.

[0011] Further, the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens satisfy: 11.5 < (R9+R10) / (R10-R9) < 28.0.

[0012] Further, the effective focal length f5 of the fifth lens, the central thickness CT5 on the optical axis of the fifth lens, and the Abbe number V5 of the fifth lens satisfy: 2.0 < f5 / (CT5*V5) < 4.0.

[0013] Further, the central thickness CT5 on the optical axis of the fifth lens, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens, and the air separation T45 on the optical axis of the fourth lens and the fifth lens satisfy: 3.5 < (CT5+SAG51) / T45 < 9.5.

[0014] Further, the curvature radius R11 of the object side surface of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the maximum effective radius DT61 of the object side surface of the sixth lens, and the maximum effective radius DT62 of the image side surface of the sixth lens satisfy: 5.0 < |R11 / DT61+R12 / DT62| < 7.5.

[0015] Further, an air separation T56 on the optical axis between the fifth lens and the sixth lens, an on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis and the effective radius vertex of the image side surface of the fifth lens, an on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side surface of the sixth lens satisfy: 3.1 < T56 / |SAG52+SAG61| < 7.5.

[0016] Further, a radius of curvature R7 of the object side surface of the fourth lens, a vertical distance YC41 between the point where the effective radial distance of the object side surface of the fourth lens to the imaging surface of the optical lens group is the largest and the optical axis satisfy: -4.5 < R7 / YC41 < -2.5.

[0017] Further, a radius of curvature R8 of the image side surface of the fourth lens, a vertical distance YC42 between the point where the effective radial distance of the image side surface of the fourth lens to the imaging surface of the optical lens group is the largest and the optical axis satisfy: -9.0 < R8 / YC42 < -5.5.

[0018] Further, an effective focal length f6 of the sixth lens, a central thickness CT6 of the sixth lens satisfy: -36.5 < f6 / CT6 < -13.0.

[0019] The optical lens assembly has six lens pieces with optical power, the six lens pieces are all plastic aspheric lens pieces, there is an air gap between any two adjacent lens pieces, the optical lens assembly comprises a first assembly and a second assembly, the first assembly sequentially comprises a first lens to a third lens from the object side to the image side of the optical lens assembly, the first lens has positive optical power, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, the second lens has negative optical power, 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 third lens has positive optical power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the second assembly sequentially comprises a fourth lens to a sixth lens from the object side to the image side of the optical lens assembly, the fourth lens has negative optical power, the object side surface of the fourth lens is a concave surface, the image side surface of the fourth lens is a convex surface, the fifth lens has positive optical power, the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a concave surface, the sixth lens has negative optical power, the object side surface of the sixth lens is a concave surface, the image side surface of the sixth lens is a convex surface, and neither the object side surface of the sixth lens nor the image side surface of the sixth lens has a reverse point; wherein the distance between the first assembly and the second assembly on the optical axis of the optical lens assembly is variable; the combined focal length f123 of the first lens, the second lens and the third lens, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy: 1.5 < f123 / (CT1+CT2+CT3) < 3.0; the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT6 of the sixth lens on the optical axis satisfy: -8.5 < f456 / (CT4+CT5+CT6) < -6.0.

[0020] The application provides a six-piece variable focus optical lens assembly comprising two assemblies, but the variable focus optical lens assembly is prone to the problems of slow focusing caused by image plane movement and unclear imaging. By reasonably matching the optical power of each lens, the optical power is evenly distributed to each assembly and each lens, the quality of the entire optical lens assembly is uniformly stable, the problems such as aberration are avoided, the imaging quality is high, and the optical lens assembly is convenient to process. The object side and the image side of the sixth lens are both free of reverse points, so that the sensitivity can be ensured. Meanwhile, by controlling the combined focal length of the first assembly and the second assembly and the proportion of the thickness of the internal lens, the focal length of each lens assembly can be distributed, the continuous zooming capability of the optical lens assembly can be met, a large focal length change is achieved, and the imaging clarity is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an implementation of the application and, together with the description, serve to explain the application. In the drawings,

[0022] Figure 1 A structure diagram of the optical lens set of the embodiment one of the present application is shown;

[0023] Figures 2 to 5 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment one of the present application are shown respectively;

[0024] Figure 6 A structure diagram of the optical lens set of the embodiment two of the present application is shown;

[0025] Figures 7 to 10 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment two of the present application are shown respectively;

[0026] Figure 11 A structure diagram of the optical lens set of the embodiment three of the present application is shown;

[0027] Figures 12 to 15 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment three of the present application are shown respectively;

[0028] Figure 16 A structure diagram of the optical lens set of the embodiment four of the present application is shown;

[0029] Figures 17 to 20 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment four of the present application are shown respectively;

[0030] Figure 21 A structure diagram of the optical lens set of the embodiment five of the present application is shown;

[0031] Figures 22 to 25 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment five of the present application are shown respectively;

[0032] Figure 26 A structure diagram of the optical lens set of the embodiment six of the present application is shown;

[0033] Figures 27 to 30 An on-axis chromatic aberration curve, an astigmatism curve, a distortion curve and a lateral chromatic aberration curve of the embodiment six of the present application are shown respectively;

[0034] Figure 31 A structure diagram of the optical lens set of the embodiment seven of the present application is shown;

[0035] Figures 32 to 35The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the lateral chromatic aberration curve of the embodiment seven of the application are shown respectively;

[0036] Figure 36 The structural schematic diagram of the optical lens assembly of the embodiment eight of the application is shown;

[0037] Figures 37 to 40 The axial chromatic aberration curve, the astigmatism curve, the distortion curve and the lateral chromatic aberration curve of the embodiment eight of the application are shown respectively;

[0038] Figure 41 The MTF curve diagram of the optical lens assembly of an optional embodiment of the application under the condition of infinity, f123 / (CT1+CT2+CT3)=2.71, f456 / (CT4+CT5+CT6)=-6.13 is shown;

[0039] Figure 42 The MTF curve diagram of the optical lens assembly of an optional embodiment of the application under the condition of macro, f123 / (CT1+CT2+CT3)=2.71, f456 / (CT4+CT5+CT6)=-6.13 is shown;

[0040] Figure 43 The MTF curve diagram of the optical lens assembly in the prior art under the condition of infinity, f123 / (CT1+CT2+CT3)=3.68, f456 / (CT4+CT5+CT6)=-5.25 is shown;

[0041] Figure 44 The MTF curve diagram of the optical lens assembly in the prior art under the condition of macro, f123 / (CT1+CT2+CT3)=3.68, f456 / (CT4+CT5+CT6)=-5.25 is shown.

[0042] Wherein, the above drawings include the following reference signs:

[0043] STO, stop; E1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; E2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; E3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; E4, fourth lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; E5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; E6, sixth lens;

[0044] S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; E7, filter; S13, object side surface of the filter; S14, image side surface of the filter; S15, imaging surface. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0046] It should be noted that unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0047] In the present application, unless otherwise stated, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0048] It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, 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.

[0049] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for the convenience of illustration. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not drawn strictly to scale.

[0050] In this context, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, 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 specified, it means that the lens surface is concave at least in the paraxial region. The surface of each lens near the object side is the object side surface of the lens, and the surface of each lens near the image side is the image side surface of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, with 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) to judge the convexity and concavity. As for the object side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; as for the image side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0051] In order to solve the problems of focusing difficulty and blurred imaging of the optical lens assembly in the prior art, the present application provides an optical lens assembly.

[0052] First embodiment

[0053] like Figures 1 to 42 As shown, the optical lens assembly comprises six lenses with optical power, all of which are plastic aspherical lenses. An air gap exists between any two adjacent lenses. The optical lens assembly includes a first component and a second component. From the object side to the image side, the first component of the optical lens assembly sequentially includes a first lens to a third lens. The first lens has positive optical power, a convex object side, and a concave image side. The second lens has negative optical power, a convex object side, and a concave image side. The third lens has positive optical power, a convex object side, and a convex image side. From the object side to the image side, the second component of the optical lens assembly sequentially includes a fourth lens to a sixth lens. The fourth lens has negative optical power, a concave object side, and a convex image side. The fifth lens has positive optical power, a convex object side, and a concave image side. The sixth lens has negative optical power, its object-side surface is concave, its image-side surface is convex, and neither its object-side nor image-side surface has inflection points. The distance between the first and second components on the optical axis of the lens group is variable. The combined focal length f123 of the first, second, and third lenses, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, and the center thickness CT3 of the third lens on the optical axis satisfy the following: 1.5 < f123 / (CT1+CT2+CT3) < 3.0. The combined focal length f456 of the fourth, fifth, and sixth lenses, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy the following: -8.5 < f456 / (CT4+CT5+CT6) < -6.0.

[0054] This application provides a six-element zoom optical lens assembly comprising two components. However, zoom optical lens assemblies are prone to problems such as image plane shift, leading to slow focusing and unclear imaging. By rationally matching the positive and negative optical powers of each lens, the optical power is evenly distributed among each component and lens, ensuring uniform and stable quality of the entire optical lens assembly, avoiding aberrations and achieving high image quality and ease of manufacturing. The sixth lens has no inflection points on either the object side or the image side, ensuring good sensitivity. Simultaneously, by controlling the combined focal length of the first and second components and the thickness ratio of the internal lenses, the focal length of each lens component can be allocated, satisfying the continuous zoom capability of the optical lens assembly and allowing for a large focal length range, thus improving image sharpness.

[0055] Preferably, 1.6 < f123 / (CT1+CT2+CT3) < 2.9.

[0056] Preferably, -8.3 < f456 / (CT4+CT5+CT6) < -6.1.

[0057] The following Table 1 shows the MTF curves of the optical lens assembly of the present application and the optical lens assembly of the prior art.

[0058]

[0059] Table 1

[0060] As the optical lens assembly of the prior art provided in Sample 2 of Table 1, the ranges of 1.6 < f123 / (CT1+CT2+CT3) < 2.9 and -8.3 < f456 / (CT4+CT5+CT6) < -6.1 of the present application are not met, as shown in Figure 43 and Figure 44 The MTF curve of the S direction appears concave and reverse, especially in the high frequency case; the T direction MTF of the outer field of view under the macro (OBJ (mm): 200 (M)) drops a lot, and the overall performance is poor.

[0061] While the optical lens assembly of the present application provided in Sample 1 is controlled under the conditions of 1.6 < f123 / (CT1+CT2+CT3) < 2.9 and -8.3 < f456 / (CT4+CT5+CT6) < -6.1, as shown in Figure 41 and Figure 42 The MTF curve is very flat, the outer field of view MTF drops very little compared to the inner field of view, and the performance of the optical lens assembly is good. Therefore, the present application has higher infinity and macro shooting performance compared to the optical lens assembly of the prior art.

[0062] In the present embodiment, the effective focal length f1 of the first lens, the radius of curvature R1 of the object side of the first lens, and the maximum effective radius DT11 of the object side of the first lens satisfy: 9.0 < f1 / R1 + f1 / DT11 ≤ 14.0. By limiting f1 / R1 + f1 / DT11 within a reasonable range, the shape of the first lens can be reasonably set, ensuring that the first lens has sufficient light converging ability and effectively compressing the spatial configuration between lenses. Preferably, 9.05 < f1 / R1 + f1 / DT11 ≤ 14.0.

[0063] In the embodiment, the effective focal length f2 of the second lens, the refractive index N2 of the second lens, the curvature radius R3 of the object side surface of the second lens, and the curvature radius R4 of the image side surface of the second lens satisfy: 1.5 < |f2*N2 / (R3+R4)| < 2.0. By limiting |f2*N2 / (R3+R4)| within a reasonable range, the effective focal length, the refractive index of the second lens, and the object side surface of the second lens can be convex, and the image side surface can be concave, so that the path of the light rays after penetrating the first lens can be adjusted. By controlling the refractive index of the second lens, the lens material can be controlled, and the cost can be controlled. Preferably, 1.60 < |f2*N2 / (R3+R4)| < 1.98.

[0064] In the embodiment, the effective focal length f3 of the third lens, the curvature radius R6 of the image side surface of the third lens, the effective focal length f4 of the fourth lens, and the curvature radius R7 of the object side surface of the fourth lens satisfy: -7.0 < f3 / R6-f4 / R7 < -4.5. By limiting f3 / R6-f4 / R7 within a reasonable range, the spherical aberration of the optical lens group can be reduced, and the performance of the far shot mode and the close shot mode can be balanced, thereby ensuring the feasibility of zooming. Preferably, -6.80 < f3 / R6-f4 / R7 < -4.55.

[0065] In the embodiment, the sum ∑CT of the central thicknesses of the six lenses on the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT1 of the first lens on the optical axis satisfy: 1.5 < ∑CT / (CT3+CT1) < 2.0. By limiting ∑CT / (CT3+CT1) within a reasonable range, the first lens and the third lens are respectively the lens closest to the object side of the first assembly and the lens closest to the second assembly, and the ratio of the total central thickness of the lenses to the sum of the central thicknesses of the first lens and the third lens is reasonably set, which is beneficial to the constraint of the focal length and the size of each lens in the first assembly and the connection of the lenses before and after the first assembly. Preferably, 1.53 < ∑CT / (CT3+CT1) < 1.85.

[0066] In the embodiment, the central thickness CT4 of the fourth lens on the optical axis, the air separation T45 of the fourth lens and the fifth lens on the optical axis, and the on-axis distance SAG42 between the intersection of the image side surface of the fourth lens and the optical axis and the effective radius vertex of the image side surface of the fourth lens satisfy: 1.0 < (CT4+T45) / SAG42 < 2.5. By limiting (CT4+T45) / SAG42 within a reasonable range, the size of the fourth lens can be effectively controlled, the volume of the optical lens group can be prevented from being too large, and the axial chromatic aberration and the spherical aberration can also be corrected, thereby obtaining better macro shooting effect. Preferably, 1.1 < (CT4+T45) / SAG42 < 2.4.

[0067] In the embodiment, the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens satisfy: 11.5 < (R9+R10) / (R10-R9) < 28.0. By limiting (R9+R10) / (R10-R9) within a reasonable range, the surface shape of the fifth lens can be balanced, the ability of aberration correction can be strengthened, and the image quality can be improved. Preferably, 11.55 < (R9+R10) / (R10-R9) < 27.85.

[0068] In the embodiment, the effective focal length f5 of the fifth lens, the central thickness CT5 of the fifth lens on the optical axis, the Abbe number V5 of the fifth lens satisfy: 2.0 < f5 / (CT5*V5) < 4.0. By limiting f5 / (CT5*V5) within a reasonable range, the surface shape of the fifth lens can be improved, and the structural arrangement can be facilitated. The fifth lens adopts a high refractive index, the light path can be adjusted, and the convergence ability between different wavebands of light can be balanced to correct chromatic aberration. Preferably, 2.03 < f5 / (CT5*V5) < 3.65.

[0069] In the embodiment, the central thickness CT5 of the fifth lens on the optical axis, the on-axis distance SAG51 between the intersection of the object side surface of the fifth lens and the optical axis and the effective radius vertex of the object side surface of the fifth lens, the air separation T45 of the fourth lens and the fifth lens on the optical axis satisfy: 3.5 < (CT5+SAG51) / T45 < 9.5. By limiting (CT5+SAG51) / T45 within a reasonable range, the axial chromatic aberration and spherical aberration can be corrected, better macro shooting effects can be obtained, and the size of the fifth lens can be effectively controlled, which is beneficial to structural adjustment and arrangement. Preferably, 3.51 < (CT5+SAG51) / T45 < 9.45.

[0070] In the embodiment, the radius of curvature R11 of the object side surface of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, the maximum effective radius DT61 of the object side surface of the sixth lens, the maximum effective radius DT62 of the image side surface of the sixth lens satisfy: 5.0 < |R11 / DT61+R12 / DT62| < 7.5. By limiting |R11 / DT61+R12 / DT62| within a reasonable range, the on-axis and off-axis aberrations at different working object distances can be corrected, and better zoom effects can be obtained. Preferably, 5.02 < |R11 / DT61+R12 / DT62| < 7.45.

[0071] In the embodiment, the air gap T56 on the optical axis between the fifth lens and the sixth lens, the on-axis distance SAG52 between the intersection of the image side surface of the fifth lens and the optical axis to the effective radius vertex of the image side surface of the fifth lens, the on-axis distance SAG61 between the intersection of the object side surface of the sixth lens and the optical axis to the effective radius vertex of the object side surface of the sixth lens satisfy: 3.1 < T56 / |SAG52+SAG61| < 7.5. By limiting T56 / |SAG52+SAG61| within a reasonable range, it is beneficial to control the front-back sag of the fifth lens and the sixth lens, to constrain the curvature of the overall shape of the lens, to adjust the light deflection angle, and to facilitate the light passing through the sixth lens to reach the image plane well, thereby obtaining the best imaging quality. Preferably, 3.1 < T56 / |SAG52+SAG61| < 7.4.

[0072] In the embodiment, the radius of curvature R7 of the object side surface of the fourth lens, the vertical distance YC41 between the point with the largest distance from the effective diameter of the object side surface of the fourth lens to the imaging surface of the optical lens group and the optical axis satisfy: -4.5 < R7 / YC41 < -2.5. By limiting R7 / YC41 within a reasonable range, the correction ability of the off-axis aberration at the image side end of the optical lens group can be strengthened, and it is beneficial to reduce distortion and image curvature. Preferably, -4.4 < R7 / YC41 < -2.6.

[0073] In the embodiment, the radius of curvature R8 of the image side surface of the fourth lens, the vertical distance YC42 between the point with the largest distance from the effective diameter of the image side surface of the fourth lens to the imaging surface of the optical lens group and the optical axis satisfy: -9.0 < R8 / YC42 < -5.5. By limiting R8 / YC42 within a reasonable range, the correction ability of the off-axis aberration at the image side end of the optical lens group can be strengthened, and it is beneficial to reduce distortion and image curvature. Preferably, -9.0 < R8 / YC42 < -5.6.

[0074] In the embodiment, the effective focal length f6 of the sixth lens, the central thickness CT6 of the sixth lens satisfy: -36.5 < f6 / CT6 < -13.0. By limiting f6 / CT6 within a reasonable range, the face shape of the sixth lens can be improved, the back focal length can be shortened, and appropriate spatial configuration can be achieved. Preferably, -36.3 < f6 / CT6 < -13.2.

[0075] Second Embodiment

[0076] As Figures 1 to 42As shown, the optical lens assembly has six lens pieces with optical power, the six lens pieces are all plastic aspheric lens pieces, there is an air gap between any two adjacent lens pieces, the optical lens assembly comprises a first assembly and a second assembly, the first assembly sequentially comprises a first lens to a third lens from the object side to the image side of the optical lens assembly, the first lens has positive optical power, the object side surface of the first lens is a convex surface, the image side surface of the first lens is a concave surface, the second lens has negative optical power, 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 third lens has positive optical power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the second assembly sequentially comprises a fourth lens to a sixth lens from the object side to the image side of the optical lens assembly, the fourth lens has negative optical power, the object side surface of the fourth lens is a concave surface, the image side surface of the fourth lens is a convex surface, the fifth lens has positive optical power, the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a concave surface, the sixth lens has negative optical power, the object side surface of the sixth lens is a concave surface, the image side surface of the sixth lens is a convex surface, and neither the object side surface of the sixth lens nor the image side surface of the sixth lens has an inflection point; wherein the sum of the center thicknesses of the six lens pieces on the optical axis ∑CT, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT1 of the first lens on the optical axis satisfy: 1.5 < ∑CT / (CT3+CT1) < 2.0; and the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, the center thickness CT4 of the fourth lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, and the center thickness CT6 of the sixth lens on the optical axis satisfy: -8.5 < f456 / (CT4+CT5+CT6) < -6.0.

[0077] The present application provides a six-piece zoom optical lens assembly comprising two assemblies, but the zoom optical lens assembly is prone to the problems of slow focusing caused by image surface movement and unclear imaging. By reasonably matching the optical power of each lens, the optical power is evenly distributed to each assembly and each lens, ensuring that the quality of the entire optical lens assembly is uniform and stable, avoiding problems such as aberration, and achieving high imaging quality, easy processing and other characteristics. The object side and image side of the sixth lens do not have an inflection point, which can ensure good sensitivity. At the same time, by controlling the combined focal length of the first assembly and the second assembly and the ratio of the thickness of the internal lens, the focal length of each lens assembly can be distributed, and the front and rear lenses can be better connected, while meeting the continuous zooming capability of the optical lens assembly and having a large focal length change, thereby improving the imaging clarity.

[0078] Preferably, 1.53 < ∑CT / (CT3+CT1) < 1.85.

[0079] Preferably, -8.3 < f456 / (CT4+CT5+CT6) < -6.1.

[0080] It should be noted that the other conditional expressions in the first embodiment can also be included in the present embodiment, which will not be described here.

[0081] Optionally, the optical lens assembly described above can further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The optical lens assembly in the present application can adopt multiple lenses, for example, the six lenses described above. By reasonably allocating the effective focal length, surface shape, central thickness of each lens, and on-axis distance between each lens, etc., the aperture of the optical lens assembly can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical lens assembly is more conducive to production and processing and can be applied to portable electronic devices such as smartphones.

[0082] The specific surface shape and parameters of the optical lens assembly applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0083] It should be noted that any one of the following examples 1 to 6 is applicable to all embodiments of the present application.

[0084] Example 1

[0085] As shown in Figures 1 to 5 , the optical lens assembly of example 1 of the present application is described.

[0086] As shown in Figure 1 , the optical lens assembly sequentially includes a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7 from the object side to the image side. Among them, the first lens to the third lens form a first assembly, and the fourth lens to the sixth lens form a second assembly. Under the premise that the TTL is unchanged, the interval distance of the first assembly and the second assembly on the optical axis can be changed to realize the switching of infinity and macro shooting.

[0087] As shown in Figure 1 , the first lens has positive refractive power, the object side surface of the first lens is S1, and the image side surface of the first lens is S2. The second lens has negative refractive power, the object side surface of the second lens is S3, and the image side surface of the second lens is S4. The third lens has positive refractive power, the object side surface of the third lens is S5, and the image side surface of the third lens is S6. The fourth lens has negative refractive power, the object side surface of the fourth lens is S7, and the image side surface of the fourth lens is S8. The fifth lens has positive refractive power, the object side surface of the fifth lens is S9, and the image side surface of the fifth lens is S10. The sixth lens has negative refractive power, the object side surface of the sixth lens is S11, and the image side surface of the sixth lens is S12. The object side surface of the filter is S13, and the image side surface of the filter is S14. The light from the object passes through S1 to S14 in turn and finally reaches the imaging surface S15.

[0088] Table 2 shows the basic structure parameter table of the optical lens assembly of Example One, wherein the units of the radius of curvature, thickness / distance, effective focal length are all millimeters (mm).

[0089]

[0090]

[0091] Table 2

[0092] The partial optical parameters of the optical lens assembly of the present embodiment in the first state, i.e., in the infinity shooting, are shown in Table 3.

[0093] W First state OBJ (mm) Infinity (IN) Semi-FOV (°) 11.9612 f / EPD 2.6498 f (mm) 18.0455 T34 (mm) 1.3061 BFL (mm) 6.7000 T (mm) 4.0781

[0094] Table 3

[0095] In the present embodiment, the first lens to the sixth lens are all aspherical lenses, and the surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0096]

[0097] wherein x is the sag of the aspherical surface at 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 radius of curvature 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 4 below shows the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used in the aspherical surfaces of the present embodiment.

[0098]

[0099]

[0100] Table 4

[0101] Figure 2 The axial chromatic aberration curve of the optical lens assembly of Example One is shown, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical lens assembly. Figure 3 The astigmatism curve of the optical lens assembly of Example One is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 4 The distortion curve of the optical lens assembly of Example One is shown, which represents the distortion size values corresponding to different field angles. Figure 5 The lateral chromatic aberration curve of the optical lens assembly of Example One is shown, which represents the deviation of the light rays on the imaging surface after passing through the optical lens assembly.

[0102] According toFigures 2 to 5 As can be seen, the optical lens assembly given in Example 1 can achieve good imaging quality.

[0103] Example 2

[0104] like Figure 6 As shown, the difference from Embodiment 1 is that at least some parameters of the optical lens assembly, such as the shooting distance and field of view, are different. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted.

[0105] It should be noted that the curvature radius, center thickness, and other parameters of the first to sixth lenses of the optical lens group in Embodiment 2 are the same as those in Embodiment 1, as shown in Tables 2 and 4. However, at least some parameters of the optical lens group, such as the shooting distance and field of view, are different. The imaging quality of the optical lens group in this embodiment is as follows: Figures 7 to 10 As shown.

[0106] Table 5 shows some of the optical parameters of the optical lens group in the second state of this embodiment, which is the macro photography.

[0107] W Second state OBJ (mm) 200(M) Semi-FOV (°) 11.7138 f / EPD 2.6352 f (mm) 16.0219 T34 (mm) 1.3328 BFL (mm) 5.3672 T (mm) 2.7454

[0108] Table 5

[0109] Example 3

[0110] like Figures 11 to 15 As shown, an optical lens assembly according to Embodiment 3 of this application is described.

[0111] like Figure 11 As shown, the optical lens assembly, from the object side to the image side, includes an aperture stop (STO), a first lens (E1), a second lens (E2), a third lens (E3), a fourth lens (E4), a fifth lens (E5), a sixth lens (E6), and a filter (E7). The first to third lenses form the first assembly, and the fourth to sixth lenses form the second assembly. With the TTL remaining constant, the distance between the first and second assemblies on the optical axis can be varied to achieve switching between infinity and macro photography.

[0112] like Figure 11As shown, the first lens has positive refractive power, the object side of the first lens is S1, the image side of the first lens is S2, the second lens has negative refractive power, the object side of the second lens is S3, the image side of the second lens is S4, the third lens has positive refractive power, the object side of the third lens is S5, the image side of the third lens is S6, the fourth lens has negative refractive power, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the fifth lens has positive refractive power, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the sixth lens has negative refractive power, the object side of the sixth lens is S11, and the image side of the sixth lens is S12. The object side of the filter is S13, and the image side of the filter is S14. Light from an object passes through S1 to S14 in turn and finally reaches the imaging surface S15.

[0113] Table 6 shows a basic structure parameter table of the optical lens group of Example Three, wherein the units of the radius of curvature, the thickness / distance, and the effective focal length are millimeters (mm).

[0114] Surface number Surface type Curvature radius Thickness Refractive index Abbe number Conic constant OBJ Spherical Infinity W STO Spherical Infinity -0.5715 S1 Aspherical 8.3860 2.9543 1.54 56.1 0.0000 S2 Aspherical 13.5846 0.5237 0.0000 S3 Aspherical 5.3808 1.2725 1.61 25.9 0.0000 S4 Aspherical 2.5717 0.5048 -1.0000 S5 Aspherical 3.9212 2.9510 1.54 56.1 0.0000 S6 Aspherical -12.7267 T34 0.0000 S7 Aspherical -3.6870 0.3615 1.56 37.4 0.0000 S8 Aspherical -5.3255 0.3068 -0.6257 S9 Aspherical 5.0581 0.7333 1.67 19.2 0.0000 S10 Aspherical 5.8240 1.3693 0.0000 S11 Aspherical -5.0580 0.8771 1.54 56.1 0.0000 S12 Aspherical -8.6632 T 0.0000 S13 Aspherical Spherical 0.1100 1.51 64.1 S14 Infinity Spherical 2.5118 S15 Infinity Spherical

[0115] Table 6

[0116] The partial optical parameters of the optical lens group in the first state of the embodiment, that is, the optical lens group in the infinity shooting, are shown in Table 7.

[0117]

[0118]

[0119] Table 7

[0120] In the embodiment, the first lens to the sixth lens are all aspherical lenses, and the surface type of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example One.

[0121] Table 8 gives the high-order term coefficients of the aspherical surface that can be used in the embodiment.

[0122] Infinity A4 A6 A8 A10 A12 A14 A16 S1 -6.2562E-02 -8.6002E-03 -5.4657E-04 9.2955E-05 -4.4457E-05 1.2192E-05 -3.0594E-06 S2 -1.3663E-01 -2.9259E-03 -3.1945E-03 2.2543E-03 -1.0354E-03 3.3753E-04 -9.7457E-05 S3 -4.9821E-01 4.0195E-02 -9.1132E-03 3.7486E-03 -1.5544E-03 4.4776E-04 -1.0259E-04 S4 -5.5457E-01 6.3352E-02 -1.1117E-02 3.7321E-03 -1.4672E-03 3.9540E-04 -9.7024E-05 S5 -3.5969E-01 1.7357E-02 -4.3043E-03 1.3561E-03 -5.6314E-04 8.9545E-05 -8.7210E-06 S6 5.1192E-02 4.0027E-03 2.3715E-04 7.3902E-05 2.4646E-07 -7.9265E-06 1.0465E-06 S7 1.0614E+00 -1.2113E-01 3.1380E-02 -8.3294E-03 2.8824E-03 -9.7091E-04 3.5790E-04 S8 8.9137E-01 -1.1046E-01 3.1753E-02 -8.7171E-03 3.5028E-03 -1.1102E-03 4.8905E-04 S9 -2.5335E-01 1.1110E-02 8.4901E-03 -3.8517E-03 1.5212E-03 -5.2228E-04 3.3498E-04 S10 -3.3804E-01 4.2505E-02 2.3036E-03 -1.5348E-03 1.4809E-05 -2.5454E-05 9.8959E-05 S11 -5.5485E-02 3.2051E-02 1.5856E-03 -2.2362E-03 -1.6228E-04 1.1283E-04 5.1272E-05 S12 -5.9898E-02 8.4830E-03 -4.4048E-03 -1.6036E-03 1.7742E-04 8.5489E-05 2.4832E-05 Surface number A18 A20 A22 A24 A26 A28 A30 S1 7.9287E-07 5.9183E-08 5.3249E-07 -5.9759E-07 5.3865E-08 -5.7285E-07 4.0001E-07 S2 1.8948E-05 -3.5096E-06 -2.5550E-06 -1.7876E-07 -3.5144E-07 1.8781E-07 2.4059E-07 S3 1.1041E-05 4.2618E-06 -4.3821E-06 1.4656E-06 -5.4852E-07 3.2240E-08 2.5780E-07 S4 8.4424E-06 3.4678E-06 -2.8550E-06 2.0055E-06 -6.0403E-07 -3.7339E-08 8.8568E-08 S5 -1.0886E-05 5.1871E-06 -2.3318E-06 9.3848E-07 -6.4325E-07 -1.8866E-08 1.6588E-07 S6 -5.0397E-06 -9.9780E-08 -1.5030E-06 -6.7281E-07 -6.6298E-07 -1.8316E-07 -1.2112E-07 S7 -1.4941E-04 5.7690E-05 -2.3117E-05 5.1156E-06 -6.1102E-06 9.5141E-07 6.3435E-08 S8 -2.0089E-04 7.7497E-05 -3.3010E-05 8.4427E-06 -1.1020E-05 -7.3423E-07 -7.4597E-07 S9 -1.2909E-04 6.2554E-05 -2.9992E-05 6.8019E-06 -1.3937E-05 -2.4392E-06 -2.7471E-06 S10 -9.5438E-06 9.9734E-06 -1.7586E-05 -1.1735E-05 -1.4782E-05 -5.6423E-06 -2.5287E-06 S11 1.9173E-05 1.2655E-06 -1.4432E-05 -2.1041E-05 -1.5461E-05 -9.5457E-06 -3.1073E-06 S12 9.4335E-06 1.0262E-06 -1.3259E-05 -1.3761E-05 -7.3251E-06 -3.1383E-06 -1.5741E-06

[0123] Table 8

[0124] Surface number The axial chromatic aberration curve of the optical lens group of Example Three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical lens group. Figure 12 The astigmatism curve of the optical lens group of Example Three is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 13 The distortion curve of the optical lens group of Example Three is shown, which represents the distortion size values corresponding to different field angles. Figure 14The magnification chromatic aberration curve of the optical lens assembly of embodiment three is shown, which represents the deviation of light rays at different image heights on the imaging plane after passing through the optical lens assembly.

[0125] According to Figure 15 It can be known that the optical lens assembly given by embodiment three can achieve good imaging quality.

[0126] Embodiment four

[0127] As Figures 12 to 15 shown, the difference from embodiment three is that at least part of the parameters such as the shooting distance, the field of view angle, etc. of the optical lens assembly are different. For the sake of brevity, part of the similar description will be omitted.

[0128] It should be noted that the curvature radius, the central thickness, etc. of the first lens to the sixth lens of the optical lens assembly in embodiment four and embodiment three are the same, as shown in table 6 and table 8, but at least part of the parameters such as the shooting distance, the field of view angle, etc. of the optical lens assembly are different. The imaging quality of the optical lens assembly of the present embodiment is as shown in Figure 16 .

[0129] The part of the optical parameters of the optical lens assembly in the second state of the present embodiment, that is, the macro shooting, are as shown in table 9.

[0130] W Figures 17 to 20 Second state 200(M) OBJ (mm) 12.2456 Semi-FOV (°) 2.6715 f / EPD 15.9469 f (mm) 1.3328 T34 (mm) 5.3672 BFL (mm) 2.7453

[0131] Table 9

[0132] Embodiment five

[0133] As T (mm) shown, the optical lens assembly of embodiment five of the present application is described.

[0134] As Figures 21 to 25 shown, the optical lens assembly comprises, in order from the object side to the image side, a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7. Among them, the first lens to the third lens constitute a first assembly, and the fourth lens to the sixth lens constitute a second assembly. Under the premise that the TTL is unchanged, the interval distance of the first assembly and the second assembly on the optical axis can be changed to realize the switching of the infinity shooting and the macro shooting.

[0135] As Figure 21As shown, the first lens has positive refractive power, the object side of the first lens is S1, the image side of the first lens is S2, the second lens has negative refractive power, the object side of the second lens is S3, the image side of the second lens is S4, the third lens has positive refractive power, the object side of the third lens is S5, the image side of the third lens is S6, the fourth lens has negative refractive power, the object side of the fourth lens is S7, the image side of the fourth lens is S8, the fifth lens has positive refractive power, the object side of the fifth lens is S9, the image side of the fifth lens is S10, the sixth lens has negative refractive power, the object side of the sixth lens is S11, and the image side of the sixth lens is S12. The object side of the filter is S13, and the image side of the filter is S14. Light from an object passes through S1 to S14 in turn and finally reaches the imaging surface S15.

[0136] Table 10 shows a basic structure parameter table of the optical lens set of Example Five, wherein the units of the radius of curvature, the thickness / distance, and the effective focal length are millimeters (mm).

[0137]

[0138]

[0139] Table 10

[0140] The partial optical parameters of the optical lens set in the first state of the present embodiment, i.e., the optical lens set in the infinity focus state, are shown in Table 11.

[0141] W Figure 21 First state OBJ (mm) Infinity (IN) 12.5058 Semi-FOV (°) 2.7098 f / EPD 17.9500 f (mm) 1.2918 T34 (mm) 6.4800 BFL (mm) 4.8700

[0142] Table 11

[0143] In the present embodiment, the first lens to the sixth lens are all aspherical lenses, and the surface type of each aspherical lens can be defined by, but is not limited to, the formula (1) in Example One.

[0144] Table 12 gives the high-order term coefficients of the aspherical surfaces that can be used in the present embodiment.

[0145]

[0146]

[0147] Table 12

[0148] T (mm) The axial chromatic aberration curve of the optical lens set of Example Five is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical lens set. Figure 22 The astigmatism curve of the optical lens set of Example Five is shown, which represents the meridional image surface curvature and the sagittal image surface curvature. Figure 23The distortion curve of the optical lens assembly of embodiment five is shown, which represents the distortion size value corresponding to different field angles of view. Figure 24 The magnification chromatic aberration curve of the optical lens assembly of embodiment five is shown, which represents the deviation of light rays on the imaging surface at different image heights after passing through the optical lens assembly.

[0149] According to Figure 25 It can be known that the optical lens assembly given by embodiment five can achieve good imaging quality.

[0150] Embodiment six

[0151] As Figures 22 to 25 shown, the difference from embodiment five is that at least part of the parameters such as the shooting distance, field angle of view, etc. of the optical lens assembly are different. For the sake of brevity, part of the similar description as embodiment five will be omitted.

[0152] It should be noted that the curvature radius, central thickness, etc. of the first lens to the sixth lens of the optical lens assembly in embodiment six and embodiment five are the same, as shown in table 10 and table 12, but at least part of the parameters such as the shooting distance, field angle of view, etc. of the optical lens assembly are different. The imaging quality of the optical lens assembly of the present embodiment is shown as Figure 26 .

[0153] The part of the optical parameters of the optical lens assembly in the second state of the present embodiment, that is, under macro shooting, are shown in table 13.

[0154] W Figures 27 to 30 Second state 200(M) OBJ (mm) 12.2716 Semi-FOV (°) 2.6982 f / EPD 15.9545 f (mm) 1.2468 T34 (mm) 5.2332 BFL (mm) 3.6232

[0155] Table 13

[0156] Embodiment seven

[0157] As T (mm) shown, the optical lens assembly of embodiment seven of the present application is described.

[0158] As Figures 31 to 35 shown, the optical lens assembly sequentially comprises a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, and a filter E7 from the object side to the image side. Among them, the first lens to the third lens form a first assembly, and the fourth lens to the sixth lens form a second assembly. Under the premise that the TTL is unchanged, the interval distance of the first assembly and the second assembly on the optical axis can be changed to realize the switching of infinity shooting and macro shooting.

[0159] As Figure 31As shown, the first lens has positive refractive power, the object side surface of the first lens is S1, the image side surface of the first lens is S2, the second lens has negative refractive power, the object side surface of the second lens is S3, the image side surface of the second lens is S4, the third lens has positive refractive power, the object side surface of the third lens is S5, the image side surface of the third lens is S6, the fourth lens has negative refractive power, the object side surface of the fourth lens is S7, the image side surface of the fourth lens is S8, the fifth lens has positive refractive power, the object side surface of the fifth lens is S9, the image side surface of the fifth lens is S10, the sixth lens has negative refractive power, the object side surface of the sixth lens is S11, and the image side surface of the sixth lens is S12. The object side surface of the filter is S13, and the image side surface of the filter is S14. Light from an object passes through S1 to S14 in turn and finally reaches the imaging surface S15.

[0160] Table 14 shows the basic structure parameter table of the optical lens group of Example Seven, wherein the units of the radius of curvature, the thickness / distance, and the effective focal length are millimeters (mm).

[0161] Figure 31 Surface number Surface type Curvature radius Thickness Refractive index Abbe number Conic constant OBJ Spherical W Infinity STO Spherical -0.5824 S1 Infinity 8.4646 3.0000 1.54 56.1 0.0000 S2 Aspherical 25.5931 0.0510 0.0000 S3 Aspherical 6.0663 1.2431 1.61 25.9 0.0000 S4 Aspherical 2.7369 0.5647 -1.0000 S5 Aspherical 4.6581 3.0000 1.54 56.1 0.0000 S6 Aspherical -12.0458 T34 0.0000 S7 Aspherical -4.2985 0.2877 1.56 37.4 0.0000 S8 Aspherical -6.7002 0.2618 -0.8898 S9 Aspherical 4.3737 0.7975 1.66 20.3 0.0000 S10 Aspherical 4.7643 1.2721 0.0000 S11 Aspherical -5.1666 1.3139 1.54 56.1 0.0000 S12 Aspherical -8.4856 T 0.0000 S13 Aspherical Aspherical 0.1100 1.51 64.1 S14 Spherical Infinity 2.5118 S15 Spherical Infinity

[0162] Table 14

[0163] The partial optical parameters of the optical lens group of the present embodiment in the first state, i.e., in the infinity shooting, are shown in Table 15.

[0164]

[0165]

[0166] Table 15

[0167] In the present embodiment, the first lens to the sixth lens are all aspherical lenses, and the surface type of each aspherical lens can be defined by, but not limited to, the formula (1) in Example One.

[0168] Table 16 shows the high-order term coefficients of the aspherical surface that can be used in the present embodiment.

[0169] Spherical A4 A6 A8 A10 A12 A14 A16 S1 -4.9686E-02 -1.0447E-02 -4.3645E-04 -2.6705E-05 -1.2724E-06 6.1324E-06 -5.0378E-06 S2 -3.9256E-02 -2.4087E-02 4.1775E-03 -3.2506E-05 -3.1854E-06 -1.7410E-04 -2.5012E-05 S3 -4.3952E-01 2.3502E-02 3.3729E-06 4.6303E-04 -1.9429E-04 -2.8022E-04 -2.4526E-05 S4 -5.3566E-01 5.1070E-02 -4.3002E-03 8.7368E-04 -2.8131E-04 -2.2090E-04 -2.1992E-05 S5 -2.4774E-01 9.7325E-03 7.8825E-04 7.2783E-05 -6.4418E-05 -1.6449E-04 -2.6637E-05 S6 4.7838E-02 2.7267E-03 2.8594E-04 1.2496E-05 9.0832E-06 -1.3716E-05 -2.7473E-06 S7 1.0105E+00 -1.2236E-01 3.1772E-02 -8.3634E-03 2.8574E-03 -9.3320E-04 3.5528E-04 S8 9.0786E-01 -1.1502E-01 3.2871E-02 -8.5659E-03 3.4667E-03 -1.0335E-03 5.3864E-04 S9 -2.7001E-01 1.3275E-02 4.1529E-03 -2.3091E-03 7.4624E-04 -4.7652E-04 2.5385E-04 S10 -3.4178E-01 4.5175E-02 1.9845E-03 -6.3619E-04 -9.0598E-04 -3.1962E-04 -1.9041E-05 S11 -1.3491E-01 1.8790E-02 4.8949E-03 -4.1372E-04 -6.7992E-04 -3.3982E-04 -1.0208E-04 S12 -1.3165E-01 -4.6089E-04 -2.9918E-03 -1.2248E-03 -2.1920E-04 -2.5663E-05 1.6167E-05 Infinity A18 A20 A22 A24 A26 A28 A30 S1 8.0234E-07 7.1049E-08 6.8777E-07 -3.4119E-07 -1.1942E-07 -3.1640E-07 2.1212E-07 S2 3.2683E-05 -4.9235E-06 8.9115E-07 -4.4279E-06 2.4133E-06 -2.8257E-06 1.6788E-06 S3 4.1487E-05 -5.4102E-06 -2.5501E-06 -4.2606E-06 3.5059E-06 -1.8590E-06 2.3302E-06 S4 1.2394E-05 4.5215E-06 -2.6653E-06 1.0481E-06 1.5180E-06 7.5154E-07 7.2234E-07 S5 7.1218E-06 6.3251E-06 -1.5322E-06 8.1984E-07 1.2296E-06 1.0613E-06 3.9445E-07 S6 -2.8541E-06 -6.4202E-07 -2.4690E-06 -1.2337E-06 -1.2338E-06 -5.7282E-07 -9.1735E-07 S7 -1.2413E-04 6.2037E-05 -2.2892E-05 1.2535E-05 -7.1247E-06 3.0740E-06 -1.1821E-06 S8 -1.1709E-04 1.2089E-04 -2.5989E-05 2.1314E-05 -1.1450E-05 3.5696E-06 -6.9583E-07 S9 -3.1445E-05 8.7920E-05 -1.2394E-05 1.2083E-05 -1.0212E-05 -2.8793E-07 -1.9837E-06 S10 -2.5772E-06 -5.0086E-05 -8.4105E-05 -6.4022E-05 -3.8735E-05 -1.3489E-05 -3.4409E-06 S11 -1.1484E-05 -1.4083E-05 -3.2159E-05 -3.3005E-05 -2.4331E-05 -1.2459E-05 -4.3061E-06 S12 1.4475E-05 3.1003E-06 -8.9088E-06 -6.1677E-06 -3.9441E-06 -1.2683E-06 -1.2145E-06

[0170] Table 16

[0171] Surface number The axial chromatic aberration curve of the optical lens group of Example Seven is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical lens group. Surface number The astigmatism curve of the optical lens group of Example Seven is shown, which represents the meridional image surface curvature and sagittal image surface curvature. Figure 32 The distortion curve of the optical lens group of Example Seven is shown, which represents the distortion size values corresponding to different field angles. Figure 33The magnification chromatic aberration curve of the optical lens assembly of embodiment seven is shown, which represents the deviation of light rays at different image heights on the imaging plane after passing through the optical lens assembly.

[0172] According to Figure 34 It can be known that the optical lens assembly given by embodiment seven can achieve good imaging quality.

[0173] Embodiment eight

[0174] As Figure 35 shown, the difference from embodiment seven is that at least part of the parameters such as the shooting distance, the field of view angle, etc. of the optical lens assembly are different. For the sake of brevity, part of the similar description will be omitted.

[0175] It should be noted that the curvature radius, the center thickness, etc. of the first lens to the sixth lens of the optical lens assembly in embodiment eight and embodiment seven are the same, as shown in table 14 and table 16, but at least part of the parameters such as the shooting distance, the field of view angle, etc. of the optical lens assembly are different. The imaging quality of the optical lens assembly of the present embodiment is shown as Figures 32 to 35 .

[0176] The part of the optical parameters of the optical lens assembly in the second state of the present embodiment, i.e. under the macro shooting, are shown in table 17.

[0177] W Figure 36 Figures 37 to 40 200(M) Second state 11.8226 OBJ (mm) 2.6699 Semi-FOV (°) 16.0246 f / EPD 1.3355 f (mm) 5.3645 T34 (mm) 2.7426

[0178] Table 17

[0179] In summary, embodiment one to embodiment eight respectively satisfy the relationship shown in table 18.

[0180] BFL (mm) 1 2 3 4 5 6 7 8 T (mm) 9.96 9.96 14.00 14.00 11.81 11.81 9.08 9.08 Conditional expression / Embodiment 1.76 1.76 1.96 1.96 1.83 1.83 1.73 1.73 f1 / R1 + f1 / DT11 -6.52 -6.52 -6.65 -6.65 -4.60 -4.60 -5.66 -5.66 |f2*N2 / (R3+R4)| 2.71 2.71 1.64 1.64 1.78 1.78 1.63 1.63 f3 / R6 - f4 / R7 -6.13 -6.13 -8.15 -8.15 -7.36 -7.36 -6.99 -6.99 f123 / (CT1+CT2+CT3) 1.71 1.71 1.55 1.55 1.58 1.58 1.61 1.61 f456 / (CT4+CT5+CT6) 1.20 1.20 2.21 2.21 1.81 1.81 1.31 1.31 ∑CT / (CT3+CT1) 27.78 27.78 14.21 14.21 11.58 11.58 23.39 23.39 (CT4+T45) / SAG42 3.70 3.70 2.91 2.91 2.06 2.06 2.71 2.71 (R9+R10) / (R10-R9) 9.36 9.36 3.52 3.52 4.68 4.68 4.70 4.70 f5 / (CT5*V5) 7.03 7.03 5.08 5.08 5.51 5.51 5.07 5.07 (CT5+SAG51) / T45 7.01 7.01 3.11 3.11 3.74 3.74 3.70 3.70 |R11 / DT61 + R12 / DT62| -4.09 -4.09 -2.69 -2.69 -2.73 -2.73 -3.80 -3.80 T56 / |SAG52 + SAG61| -8.95 -8.95 -5.73 -5.73 -8.77 -8.77 -8.70 -8.70 R7 / YC41 -13.31 -13.31 -27.77 -27.77 -36.06 -36.06 -21.41 -21.41

[0181] Table 18

[0182] Table 19 gives part of the optical parameters of the optical lens assembly of embodiment one to embodiment eight.

[0183] R8 / YC42 1 2 3 4 5 6 7 8 f6 / CT6 24.22 24.22 33.44 33.44 27.01 27.01 21.82 21.82 Parameter / Embodiment -9.03 -9.03 -9.63 -9.63 -9.21 -9.21 -9.40 -9.40 f1 (mm) f2 (mm) f3 (mm) 6.13 6.13 5.86 5.86 5.89 5.89 6.57 6.57 f4 (mm) -27.71 -27.71 -22.81 -22.81 -15.95 -15.95 -22.00 -22.00 f5 (mm) 46.58 46.58 40.98 40.98 31.75 31.75 44.06 44.06 f6 (mm) -21.48 -21.48 -24.36 -24.36 -32.37 -32.37 -28.13 -28.13 f123 (mm) 18.05 18.05 11.80 11.80 11.57 11.57 11.80 11.80 f456 (mm) -16.12 -16.12 -16.07 -16.07 -15.46 -15.46 -16.76 -16.76 SAG42 (mm) 0.40 0.40 0.30 0.30 0.37 0.37 0.42 0.42 DT61 (mm) 2.41 2.41 2.50 2.50 2.52 2.52 2.40 2.40 DT62 (mm) 2.91 2.91 2.83 2.83 2.84 2.84 2.91 2.91 SAG51 (mm) 0.50 0.50 0.35 0.35 0.44 0.44 0.43 0.43 SAG52 (mm) 0.36 0.36 0.22 0.22 0.28 0.28 0.34 0.34 SAG61 (mm) -0.56 -0.56 -0.66 -0.66 -0.65 -0.65 -0.68 -0.68 YC41 (mm) 1.14 1.14 1.37 1.37 1.39 1.39 1.13 1.13 YC42 (mm) 0.76 0.76 0.93 0.93 0.77 0.77 0.77 0.77

[0184] Table 19

[0185] 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 separate imaging equipment such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens assembly described above.

[0186] Obviously, the above-described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present application.

[0187] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent 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, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0188] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent 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, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0189] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not limited to those embodiments; instead, they will include, in addition to the above-described embodiments, all embodiments that are equivalent in whole or in part to the embodiments described and illustrated above, and which fall within the scope of the present application. Accordingly, the scope of the present application is defined only by the following claims.

Claims

1. An optical lens assembly, characterized in that, The optical lens assembly has six lens pieces with optical power, all of which are plastic aspherical lenses, and any two adjacent lens pieces have an air gap therebetween, the optical lens assembly comprises a first component and a second component, The first component sequentially comprises a first lens to a third lens from the object side to the image side of the optical lens assembly, the first lens has positive optical power, the object side surface of the first lens is convex, the image side surface of the first lens is concave, the second lens has negative optical power, the object side surface of the second lens is convex, the image side surface of the second lens is concave, the third lens has positive optical power, the object side surface of the third lens is convex, and the image side surface of the third lens is convex; The second component sequentially comprises a fourth lens to a sixth lens from the object side to the image side of the optical lens assembly, the fourth lens has negative optical power, the object side surface of the fourth lens is concave, the image side surface of the fourth lens is convex, the fifth lens has positive optical power, the object side surface of the fifth lens is convex, the image side surface of the fifth lens is concave, the sixth lens has negative optical power, the object side surface of the sixth lens is concave, the image side surface of the sixth lens is convex, and neither the object side surface of the sixth lens nor the image side surface of the sixth lens has an inflection point; The first component and the second component have variable spacing on the optical axis of the optical lens assembly to achieve switching between infinity and micro distance shooting. The combined focal length f123 of the first lens, the second lens and the third lens, the central thickness CT1 of the first lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, and the central thickness CT3 of the third lens on the optical axis satisfy: 1.63≤f123 / (CT1+CT2+CT3)≤2.71; The combined focal length f456 of the fourth lens, the fifth lens and the sixth lens, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis, and the central thickness CT6 of the sixth lens on the optical axis satisfy: -8.15≤f456 / (CT4+CT5+CT6)≤-6.13; The radius of curvature R9 of the object side surface of the fifth lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy: 11.58≤(R9+R10) / (R10-R9)≤27.

78.

2. The optical lens according to claim 1, wherein The effective focal length f1 of the first lens, the radius of curvature R1 of the object side surface of the first lens, and the maximum effective radius DT11 of the object side surface of the first lens satisfy: 9.08≤f1 / R1+f1 / DT11≤14.

0.

3. The optical lens according to claim 1, wherein The effective focal length f2 of the second lens, the refractive index N2 of the second lens, the radius of curvature R3 of the object side surface of the second lens, and the radius of curvature R4 of the image side surface of the second lens satisfy: 1.73≤|f2*N2 / (R3+R4)|≤1.

96.

4. The optical lens according to claim 1, wherein -6.65 ≤ f3 / R6 - f4 / R7 ≤ -4.6 is satisfied.

5. The optical lens according to claim 1, wherein 1.55 ≤ ∑CT / (CT3+CT1) ≤ 1.71 is satisfied.

6. The optical lens according to claim 1, wherein 1.2 ≤ (CT4+T45) / SAG42 ≤ 2.21 is satisfied.

7. The optical lens according to claim 1, wherein 2.06 ≤ f5 / (CT5*V5) ≤ 3.7 is satisfied.

8. The optical lens according to claim 1, wherein 3.52 ≤ (CT5+SAG51) / T45 ≤ 9.36 is satisfied. 9.The optical lens assembly according to any of claims 1 to 8, wherein, 5.07 ≤ |R11 / DT61+R12 / DT62| ≤ 7.03 is satisfied. 10.The optical lens assembly according to any of claims 1 to 8, wherein, 3.11 ≤ T56 / |SAG52+SAG61| ≤ 7.01 is satisfied.

11. The optical lens according to any one of claims 1 to 8, characterized in that, -4.09 ≤ R7 / YC41 ≤ -2.69 is satisfied. 12.The optical lens assembly according to any of claims 1 to 8, wherein, -8.95 ≤ R8 / YC42 ≤ -5.73 is satisfied. 13.The optical lens assembly according to any of claims 1 to 8, wherein, A relationship between an effective focal length f6 of the sixth lens and a center thickness CT6 of the sixth lens satisfies -36.06 ≤ f6 / CT6 ≤ -13.

31. A relationship between an effective focal length f6 of the sixth lens and a center thickness CT6 of the sixth lens satisfies -36.06 ≤ f6 / CT6 ≤ -13.31.

Images