Optical lens

Abstract

The invention provides an optical lens, the optical lens comprises a lens barrel, a lens group and a spacing element group, the lens group and the spacing element group are arranged in the lens barrel, the lens group comprises a first lens, a second lens, a third lens with positive focal power, a fourth lens, a fifth lens with positive focal power and a sixth lens with positive focal power, wherein a fourth spacing element of the spacing element group is arranged between the image side surface of the fourth lens and the fifth lens and is at least partially contacted with the fourth lens, and a fifth spacing element is arranged between the image side surface of the fifth lens and the sixth lens and is at least partially contacted with the fifth lens; the fifth lens is provided with a fifth lens small platform, and the fifth lens small platform is located on the object side or the image side of the lens center of the fifth lens.

Description

Technical Field

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

[0002] In the development history of optical lenses, in the design stage, the effective diameter of the aspherical surface of the optical lens in the prior art is presented as a smooth section structure. This structure has exposed some problems in long-term practice.

[0003] From a processing perspective, the smooth aspheric effective diameter makes it difficult to accurately grasp the single-sided decentration of the lens during processing. In precision optical processing, the control of single-sided decentration is crucial. If the single-sided decentration cannot be effectively guaranteed to be within a reasonable range, it will affect the optical performance of the lens. Moreover, this smooth structure has no obvious positive effect on the optimization of the surface shape. During the processing, it is necessary to constantly adjust the process parameters in the hope of obtaining a better surface shape, but due to the lack of effective structural features, the optimization is difficult and often requires a lot of time and effort, increasing production costs and production cycles. In short, in terms of processing, it is difficult to effectively guarantee the single-sided decentration of the lens, and there is also a lack of strong support for the optimization of the surface shape.

[0004] During assembly, it is difficult for assemblers to accurately identify the center position because the effective diameter of the aspheric surface of the lens is smooth and featureless. In modern high-precision optical lens assembly, accurate determination of the center position is the key to ensuring adsorption eccentricity. If the adsorption eccentricity cannot be guaranteed to be within a very small range, the imaging quality of the lens will be reduced and the optical performance will be unstable. For example, problems such as image blur, color distortion, and distortion may occur, seriously affecting the actual use effect of the lens. Therefore, during the assembly process, it is difficult to ensure adsorption eccentricity due to the inability to accurately identify the center position, resulting in poor stability of the overall performance. In the assembly process of the optical lens of the prior art, the eccentricity and tilt of the lens during the assembly process cannot be guaranteed, resulting in a large change in the surface shape and thickness of the lens after assembly, and the overall performance is unstable; on the other hand, for the optical lens of the prior art, the center position of the lens cannot be identified during the assembly process, and the adsorption eccentricity cannot be guaranteed, thereby affecting the stability of the overall performance.

[0005] In addition, in today's fiercely competitive optical market, the performance requirements for lenses are getting higher and higher. Not only do they need to have excellent optical performance such as high resolution and high contrast, but they also need to maintain a stable working state under different environmental conditions. The smooth structure of the optical lens in the prior art is unable to meet these requirements. Summary of the invention

[0006] A major advantage of the present invention is that it provides an optical lens, wherein the lens of the optical lens is provided with a small platform, and the small platform can effectively ensure that the lens is eccentric on one side, which is beneficial to the optimization of the lens surface shape.

[0007] Another advantage of the present invention is that it provides an optical lens, in which the center position can be better identified through the small platform, ensuring the eccentric adsorption and ensuring the stability of the overall performance.

[0008] Another advantage of the present invention is that it provides an optical lens, wherein the eccentricity and tilt of the lens during the assembly process can be controlled by the small platform of the lens, so that when the lens is assembled, the change in its surface shape and thickness is small, and the overall performance is relatively stable and discrete.

[0009] According to one aspect of the present invention, an optical lens of the present invention that can achieve the aforementioned objects and other objects and advantages comprises:

[0010] Lens tube;

[0011] A lens group assembled in the lens barrel, wherein the lens group includes a first lens, a second lens, a third lens with positive power, a fourth lens, a fifth lens with positive power, and a sixth lens with positive power, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged in the lens barrel from the object side to the imaging surface side along the direction of the optical axis of the optical lens;

[0012] a spacer element group, wherein the spacer element group comprises a first spacer element, a second spacer element, a third spacer element, a fourth spacer element and a fifth spacer element, wherein the first spacer element is spaced between the first lens and the second lens, the second spacer element is spaced between the third lens and the second lens, and the third spacer element is spaced between the third lens and the fourth lens;

[0013] The fourth spacing element is disposed between the image side surface of the fourth lens and the fifth lens and is in at least partial contact with the fourth lens, and the fifth spacing element is disposed between the image side surface of the fifth lens and the sixth lens and is in at least partial contact with the fifth lens;

[0014] The fifth lens has a fifth lens platform, wherein the fifth lens platform is located on the object side or image side of the lens center of the fifth lens, Dr0910 is the half-aperture of the fifth lens platform of the fifth lens, wherein the optical lens satisfies the following parameter characteristics:

[0015] 4.75<|d5s-d4s| / (2*Dr0910)<37.30; wherein d4s is the inner diameter of the plane of the side of the fourth spacer element perpendicular to the optical axis, and d5s is the inner diameter of the plane of the side of the fifth spacer element perpendicular to the optical axis.

[0016] According to one embodiment of the present invention, the sixth lens has a sixth lens small platform, wherein the sixth lens small platform is located on the image side of the lens center of the sixth lens, Dr12 is the radius of the sixth lens small platform of the sixth lens, and the optical lens meets the following technical features:

[0017] 3.61<(DT62-DT61) / (2*Dr12)<18.80;

[0018] Among them, DT61 is the maximum effective radius of the object side of the sixth lens, and DT62 is the maximum effective radius of the image side of the sixth lens.

[0019] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0020] 0.40<(D0s-d1s) / EP01<6.25;

[0021] Wherein, D0s is the outer diameter of the plane of the object side end face of the lens barrel perpendicular to the optical axis, d1s is the inner diameter of the plane of the object side face of the spacer element perpendicular to the optical axis, and EP01 is the spacing distance from the object side end face of the lens barrel to the object side face of the spacer element along the optical axis.

[0022] According to one embodiment of the present invention, the optical lens meets the following technical characteristics: -0.70<(d3s-d2m) / EP23<1.35;

[0023] Among them, d2m is the inner diameter of the plane of the image side of the spacer element perpendicular to the optical axis, d3s is the inner diameter of the plane of the object side of the spacer element perpendicular to the optical axis, and EP23 is the spacing distance between the image side of the spacer element and the object side of the spacer element in the direction along the optical axis.

[0024] According to one embodiment of the present invention, the optical lens meets the following technical characteristics: 1.05 <L / f<3.58;

[0025] Wherein, L is the maximum horizontal distance from the object side end surface of the lens barrel to its image side end surface along the optical axis direction, and f is the effective focal length of the optical imaging system.

[0026] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0027] 2.10≤d0m / DT62<2.80;

[0028] Wherein, d0m is the inner diameter of the plane of the image side end surface of the lens barrel perpendicular to the optical axis, and DT62 is the maximum effective radius of the sixth lens image side surface of the sixth lens.

[0029] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0030] 0.15 <Yc51 / d5s<0.35;

[0031] Wherein, YC51 is the distance from the inflection point of the object side of the effective mirror of the fifth lens away from the optical axis to the optical axis, and d5s is the inner diameter of the plane of the object side surface of the fifth spacing element perpendicular to the optical axis.

[0032] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0033] 1.40≤(D5m-d5m) / |SAG61|<12.75;

[0034] Among them, d5m is the inner diameter of the plane of the image side surface of the fifth spacer element perpendicular to the optical axis, D5m is the outer diameter of the plane of the image side surface of the fifth spacer element perpendicular to the optical axis, and SAG61 is the axial distance between the intersection of the sixth lens object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the sixth lens object side surface.

[0035] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0036] 0.60 <EP01 / (CT1+T12)<1.15;

[0037] Among them, CT1 is the center thickness of the first lens on the optical axis, T12 is the air spacing between the first lens and the second lens on the optical axis, and EP01 is the spacing distance from the object side end face of the lens barrel to the object side face of the first spacing element along the optical axis.

[0038] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0039] -0.80 <d3m / R6<1.00;

[0040] Wherein, d3m is the inner diameter of the plane of the image side surface of the third spacing element perpendicular to the optical axis, and R6 is the curvature radius of the image side surface of the third lens.

[0041] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0042] 0.90≤EP45 / (CT4+T45)≤1.60

[0043] Among them, EP45 is the spacing distance between the image side surface of the fourth spacing element and the object side surface of the fifth spacing element along the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and T45 is the air spacing between the fourth lens and the fifth lens on the optical axis.

[0044] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0045] 1.85<(D4s-d4s) / CT4<11.95

[0046] Wherein, d4s is the inner diameter of the plane of the side of the fourth spacer element perpendicular to the optical axis, D4s is the outer diameter of the plane of the side of the fourth spacer element perpendicular to the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis.

[0047] According to one embodiment of the present invention, the optical lens meets the following technical characteristics:

[0048] 2.95 <D2m / EP12<11.60

[0049] Wherein, D2m is the outer diameter of the plane of the image side surface of the second spacer element perpendicular to the optical axis, and EP12 is the spacing distance between the image side surface of the first spacer element and the object side surface of the second spacer element along the optical axis.

[0050] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0051] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings, unless otherwise specified, the same reference numerals are used to represent the same components. Among them:

[0053] Figure 1 It is a schematic structural diagram of an optical lens according to a preferred embodiment of the present invention.

[0054] Figure 2 It is a schematic diagram of the dimensions of the optical lens according to the above-mentioned embodiment 1-1 of the present invention.

[0055] Figure 3 is a schematic structural diagram of an optical lens according to Embodiment 1-2 of the present invention.

[0056] Figure 4is a schematic structural diagram of an optical lens according to Embodiment 1-3 of the present invention.

[0057] Figure 5 2-1 is a schematic diagram of the structure of an optical lens according to Example 2-1 of the present invention.

[0058] Figure 6 2 is a schematic structural diagram of an optical lens according to Example 2-2 of the present invention.

[0059] Figure 7 is a schematic structural diagram of an optical lens according to Embodiment 2-3 of the present invention.

[0060] Figure 8 3-1 is a schematic diagram of the structure of an optical lens according to Example 3-1 of the present invention.

[0061] Fig. 9 3-2 is a schematic diagram of the structure of an optical lens according to Example 3-2 of the present invention.

[0062] Fig.10 3 is a schematic structural diagram of an optical lens according to Example 3-3 of the present invention.

[0063] Fig.11A and Fig. 11B It is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens of the above embodiment of the present application during simulated assembly.

[0064] Fig. 12A and Fig. 12B It is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens of another embodiment of the present application during simulated assembly.

[0065] Fig.13A and Fig. 13B It is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens of another embodiment of the present application during simulated assembly.

[0066] FIG. 14A to FIG. 14C It is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens of an embodiment of the present application.

[0067] FIG. 15A to FIG. 15C It is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens of another embodiment of the present application.

[0068] FIG. 16A to FIG. 16C It is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens of another embodiment of the present application. DETAILED DESCRIPTION

[0069] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0070] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0071] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0072] Referring to the drawings of this application specification Figures 1 to 16C As shown, an optical lens according to the present application is explained in the following description. The optical lens comprises a lens barrel P0 and a lens group E assembled in the lens barrel P0, wherein the lens group E comprises a first lens E1, a second lens E2, a third lens E3 with positive focal power, a fourth lens E4, a fifth lens E5 with positive focal power, and a sixth lens E6 with positive focal power, wherein the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are arranged in sequence in the lens barrel P0 from the object side to the imaging surface side along the direction of the optical axis of the optical lens. The lens barrel P0 has an object side end face P02, an image side end face P03, an outer annular surface P04 and an inner annular surface P05, wherein the object side end face P02 of the lens P0 faces the subject side, the image side end face P03 faces the imaging surface, the outer annular surface P04 of the lens barrel P0 is the outer surface of the lens barrel P0, and the inner annular surface P05 is the inner surface of the lens barrel P0. In this preferred embodiment of the present application, the inner annular surface P05 of the lens barrel P0 is a stepped annular surface.

[0073] The optical lens further includes a spacer element group P, wherein the spacer element group P is disposed in the lens barrel P0, and the spacer element group P is spaced between adjacent lenses of the lens group E, so that there is an air gap between adjacent lenses of the lens group E. The spacer element group P includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a fifth spacer element P5, wherein the first spacer element P1 is spaced between the first lens E1 and the second lens E2, the second spacer element P2 is spaced between the third lens E3 and the second lens E2, the third spacer element P3 is spaced between the third lens E3 and the fourth lens E4, the fourth spacer element P4 is spaced between the fourth lens E4 and the fifth lens E5, and the fifth spacer element P5 is spaced between the fifth lens E5 and the sixth lens E6.

[0074] Each lens of the lens group E has at least one object side surface facing the object side and one image side surface facing the imaging surface side. Specifically, the first lens E1 has a first lens object side surface S1 facing the object side and a first lens image side surface S2 facing the imaging surface side, the second lens E2 has a second lens object side surface S3 facing the object side and a second lens image side surface S4 facing the imaging surface side, the third lens E3 has a third lens object side surface S5 facing the object side and a third lens image side surface S6 facing the imaging surface side, the fourth lens E4 has a fourth lens object side surface S7 facing the object side and a fourth lens image side surface S8 facing the imaging surface side, the fifth lens E5 has a fifth lens object side surface S9 facing the object side and a fifth lens image side surface S10 facing the imaging surface side, and the sixth lens E6 has a sixth lens object side surface S11 facing the object side and a sixth lens image side surface S12 facing the imaging surface side.

[0075] The fourth spacing element P4 is disposed between the image side surface of the fourth lens E4 and the fifth lens E5 and is in at least partial contact with the fourth lens E4. The fifth spacing element P5 is disposed between the image side surface of the fifth lens E5 and the sixth lens E6 and is in at least partial contact with the fifth lens E5.

[0076] The fifth lens E5 has a fifth lens small platform E51, wherein the fifth lens small platform E51 is located on the object side or image side of the lens center of the fifth lens E5, Dr0910 is the half-aperture of the fifth lens small platform E51 of the fifth lens E5, that is, the maximum radius of the small plane on the object side or image side of the fifth lens E5 located at the optical axis position and perpendicular to the optical axis, wherein the optical lens satisfies the following parameter characteristics:

[0077] 4.75<|d5s-d4s| / (2*Dr0910)<37.30;

[0078] Wherein, d4s is the inner diameter of the plane of the object side of the fourth spacing element P4 perpendicular to the optical axis, and d5s is the inner diameter of the plane of the object side of the fifth spacing element P5 perpendicular to the optical axis. It is worth mentioning that the fifth lens platform E51 is arranged at the lens center of the fifth lens E5 to effectively ensure the eccentricity of the fifth lens E5.

[0079] For the optical lens, since the fifth lens E5 is a relatively sensitive lens, by effectively controlling the ratio of |d5s-d4s| and Dr0910, the eccentricity and tilt of the fifth lens E5 during the assembly process can be guaranteed, so that when the fifth lens E5 is assembled, the changes in its surface shape and thickness are small, and the overall performance is relatively stable and the discreteness is excellent.

[0080] like Fig.11A and Fig. 11B As shown in FIG. 1 , when |d5s-d4s| / (2*Dr0910)=10, the deformation diagram of the entire optical lens and the deformation diagram of the fifth lens E5 are obtained by simulating the process of completing the assembly after the suction nozzle absorbs the fifth lens E5 during actual assembly and applying a force of 20N on the suction nozzle. Fig. 12A and Fig. 12B As shown in FIG. 1 , when |d5s-d4s| / (2*Dr0910)=1, the overall deformation diagram of the optical lens and the deformation of the fifth lens E5 are obtained. Fig.13A and Fig. 13B As shown, when |d5s-d4s| / (2*Dr0910)=40, the deformation diagram of the entire optical lens and the deformation of the fifth lens E5 are obtained. According to the simulation, when the above conditional formula is met, the deformation of the fifth lens E5 changes the least, the overall deformation of the optical lens is relatively small, and the impact on the performance is small.

[0081] The sixth lens E6 has a sixth lens small platform E61, wherein the sixth lens small platform E61 is located on the image side of the lens center of the sixth lens E6, and Dr12 is the radius of the sixth lens small platform E61 of the sixth lens E6, that is, the maximum effective radius of the small plane on the image side of the sixth lens E6 that is located at the optical axis position and perpendicular to the optical axis. The optical lens meets the following technical features:

[0082] 3.61<(DT62-DT61) / (2*Dr12)<18.80;

[0083] Among them, DT61 is the maximum effective radius of the object side S11 of the sixth lens, and DT62 is the maximum effective radius of the image side S12 of the sixth lens. It is worth mentioning that by controlling the ratio of (DT62-DT61) and (2*Dr12), on the one hand, the single-sided decentration of the sixth lens E6 can be effectively guaranteed; on the other hand, during the assembly process, the position of the center can be better identified through the sixth lens small platform E61 to ensure the adsorption of decentration and the stability of the overall performance.

[0084] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0085] 0.40<(D0s-d1s) / EP01<6.25;

[0086] Among them, D0s is the outer diameter of the plane of the object side end face P02 of the lens barrel P0 perpendicular to the optical axis, d1s is the inner diameter of the plane of the object side face of the spacer element P1 perpendicular to the optical axis, and EP01 is the spacing distance from the object side end face P02 of the lens barrel P0 to the object side face of the spacer element P1 along the optical axis.

[0087] It is worth mentioning that D0s-d1s is the length of the front end face of the lens barrel, and EP01 is the thickness of the front end wall of the lens barrel and the edge thickness of the first lens E1. The length of the front end face is actually the length of the assembled supporting surface. By controlling the ratio of D0s-d1s to EP01, the strength of the first lens E1 and the lens barrel P0 is guaranteed to improve the stability of the overall performance. In addition, the wall thickness of the lens barrel P0 can effectively control the flocculent stray light caused by the too thin exit hole, thereby improving the overall imaging quality of the optical lens.

[0088] Preferably, in a specific example of the present application, the optical lens meets the following technical characteristics: -0.70<(d3s-d2m) / EP23<1.35;

[0089] Among them, d2m is the inner diameter of the plane of the image side of the spacer element P2 perpendicular to the optical axis, d3s is the inner diameter of the plane of the object side of the spacer element P3 perpendicular to the optical axis, and EP23 is the spacing distance between the image side of the spacer element P2 and the object side of the spacer element P3 along the optical axis.

[0090] It is worth mentioning that EP23 is the edge thickness of the third lens E3, and d3s-d2m is actually the inner diameter difference between the third spacing element P3 and the second spacing element P2 before and after the third lens E3. The edge thickness affects the strength of the third lens E3, and the inner diameter difference affects the bearing misalignment amount before and after the third lens E3, resulting in lens eccentricity and tilt. By controlling the ratio of d3s-d2m and EP23, the stability of the third lens E3 during the assembly process is effectively guaranteed.

[0091] Preferably, in a specific example of the present application, the optical lens meets the following technical features: 1.05 <L / f<3.58;

[0092] Wherein, L is the maximum horizontal distance from the object side end surface P02 of the lens barrel P0 to its image side end surface P03 along the optical axis direction, and f is the effective focal length of the optical imaging system.

[0093] It is worth mentioning that L is the height of the lens barrel P0. The overall lens height can be effectively controlled by controlling the ratio of L / f to ensure that the entire optical lens is within the lens barrel height range, so that the front and rear lenses do not protrude from the lens barrel P0, thereby ensuring the appearance yield during the assembly process.

[0094] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0095] 2.10≤d0m / DT62<2.80;

[0096] Wherein, d0m is the inner diameter of the plane of the image side end surface P02 of the lens barrel P0 perpendicular to the optical axis, and DT62 is the maximum effective radius of the sixth lens image side surface S12 of the sixth lens E6.

[0097] It is worth mentioning that d0m is the inner diameter of the image side end surface P02 of the lens barrel P0. When the image plane is constant, the maximum semi-aperture of the sixth lens E6 is basically fixed. By controlling the ratio of d0m and DT62, the light height can be effectively controlled so that there is no stray light directly hitting the inclined surface at the rear end of the lens barrel, thereby effectively improving the imaging quality.

[0098] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0099] 0.15 <Yc51 / d5s<0.35;

[0100] Wherein, YC51 is the distance from the inflection point of the object side of the effective lens of the fifth lens E5 away from the optical axis to the optical axis, and d5s is the inner diameter of the plane of the object side surface of the fifth spacing element P5 perpendicular to the optical axis.

[0101] It is worth mentioning that by effectively ensuring the Yc51 / d5s ratio, the distance between the effective diameter edge structure of the fifth lens E5 and the spacer can be guaranteed. The smaller the gap, the more effective it is to prevent excess light from entering, causing stray light, and improving the imaging quality of the lens.

[0102] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0103] 1.40≤(D5m-d5m) / |SAG61|<12.75;

[0104] Among them, d5m is the inner diameter of the plane of the image side surface of the fifth spacing element P5 perpendicular to the optical axis, D5m is the outer diameter of the plane of the image side surface of the fifth spacing element P5 perpendicular to the optical axis, and SAG61 is the axial distance between the intersection of the sixth lens object side surface S11 of the sixth lens E6 and the optical axis to the vertex of the effective radius of the sixth lens object side surface S12.

[0105] It is worth mentioning that (D5m-d5m) is the supporting length of the fifth spacer element P5, SAG61 is the front vector of the sixth lens E6, and by controlling the ratio of (D5m-d5m) / |SAG61|, the supporting length of the fifth spacer element P5 is sufficient to effectively reduce the change of the air gap five during the assembly process, thereby ensuring the stability of the assembly performance.

[0106] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0107] 0.60 <EP01 / (CT1+T12)<1.15;

[0108] Wherein, CT1 is the center thickness of the first lens E1 on the optical axis, T12 is the air spacing between the first lens E1 and the second lens E2 on the optical axis, and EP01 is the spacing distance from the object side end surface P02 of the lens barrel to the object side surface of the first spacing element P1 along the optical axis.

[0109] It is worth mentioning that EP01 is the thickness of the head of the lens barrel P0 and the edge thickness of the first lens E1, CT1+T12 is the middle thickness and gap of the first lens E1, and by controlling the ratio of EP01 / (CT1+T12), the thickness and strength of the lens barrel P0 and the first lens E1 can be effectively guaranteed, and the deformation of the lens barrel P0 and the first lens E1 during the assembly process can be reduced. In addition, gap 1 is also a more sensitive gap, and ensuring the stability of the air gap ensures the stability of the overall performance.

[0110] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0111] -0.80 <d3m / R6<1.00;

[0112] Wherein, d3m is the inner diameter of the plane of the image side surface of the third spacing element P3 perpendicular to the optical axis, and R6 is the curvature radius of the image side surface S6 of the third lens.

[0113] It is worth mentioning that the curvature of the two surfaces of the third lens E3 will greatly affect the internal stray light of the third lens E3. By controlling d3m / R6, the inner diameter of the third spacer element P3 can effectively improve the internal stray light of the third lens E3.

[0114] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0115] 0.90≤EP45 / (CT4+T45)≤1.60

[0116] Among them, EP45 is the spacing distance between the image side surface of the fourth spacing element P4 and the object side surface of the fifth spacing element P5 along the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, and T45 is the air spacing between the fourth lens E4 and the fifth lens E5 on the optical axis.

[0117] It is worth mentioning that EP45 is the edge thickness of the fifth lens E5. By controlling the ratio of EP45 to (CT4+T45), the fifth lens E5 has a large thickness and high strength during the assembly process, which can effectively ensure the change in the thickness of the fourth lens E4 and the air gap four, thereby ensuring the stability of the assembly performance.

[0118] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0119] 1.85<(D4s-d4s) / CT4<11.95

[0120] Wherein, d4s is the inner diameter of the plane of the object side of the fourth spacing element P4 perpendicular to the optical axis, D4s is the outer diameter of the plane of the object side of the fourth spacing element P4 perpendicular to the optical axis, and CT4 is the center thickness of the fourth lens E4 on the optical axis.

[0121] It is worth mentioning that D4s-d4s is the supporting surface length of the supporting surface of the fourth spacing element P4. By controlling the ratio of (D4s-d4s) to CT4, the deformation of the fourth lens E4 during the assembly process can be effectively reduced to ensure the stability of the assembly performance.

[0122] Preferably, in a specific example of the present application, the optical lens meets the following technical features:

[0123] 2.95 <D2m / EP12<11.60

[0124] Wherein, D2m is the outer diameter of the plane perpendicular to the optical axis on the image side of the second spacing element P2, and EP12 is the spacing distance between the image side of the first spacing element P1 and the object side of the second spacing element P2 along the optical axis.

[0125] It is worth mentioning that EP12 corresponds to the edge thickness of the second spacer element P2, D2m is the outer diameter of the second spacer element P2 behind the second lens E2, and the outer diameter-to-edge thickness ratio of the second lens E2 is indirectly controlled by controlling the ratio D2m / EP12, which is used for the early evaluation of the lens processability and can also ensure the stability of the lens in actual processing.

[0126] Tables 1 to 6 show specific examples of several different lens components of the optical lens described in the present application.

[0127] Embodiment 1 (including Embodiment 1-1, 1-2, 1-3)

[0128] Table 1 shows the parameters of each lens of the optical lens in Example 1 of the present application.

[0129]

[0130]

[0131] Table 2 shows the surface parameters of each lens of the optical lens of Example 1 of the present application.

[0132]

[0133]

[0134] Table 3 Basic data parameters of Example 1

[0135]

[0136] Table 4 Basic data of the optical lens of different embodiments (embodiments 1-1, 1-2, 1-3)

[0137] Example / Basic Data 1-1 1-2 1-3 d1s 1.530 1.589 1.602 d2m 1.840 1.823 1.781 D2m 3.700 3.600 3.540 d3s 2.084 2.122 2.143 d3m 2.084 2.122 2.143 d4s 3.106 3.159 3.043 D4s 4.840 4.206 4.699 d5s 4.284 4.242 4.168 d5m 4.284 4.242 4.168 D5m 5.500 5.560 5.500 d0m 5.798 5.838 5.739 D0s 1.947 1.947 1.947 EP01 0.850 0.830 0.840 EP12 0.327 0.336 0.306 EP23 0.260 0.265 0.300 EP45 0.497 0.483 0.402 L 3.400 3.400 3.400

[0138] Table 5 is an example. In Examples 1-1, 1-2, and 1-3, each conditional formula satisfies the conditions in the following table:

[0139] Conditional / Example 1-1 1-2 1-3 |d5s-d4s| / (2*Dr0910) 29.448 27.074 28.123 (DT62-DT61) / (2*Dr12) 5.016 5.016 5.016 (D0s-d1s) / EP01 0.490 0.431 0.411 (d3s-d2m) / EP23 0.938 1.134 1.205 L / f 3.490 3.490 3.490 d0m / DT62 2.367 2.383 2.342 Yc51 / d5s 0.247 0.250 0.254 (D5m-d5m) / |SAG61| 3.002 3.253 3.289 EP01 / (CT1+T12) 0.971 0.948 0.960 d3m / R6 0.652 0.664 0.670 EP45 / (CT4+T45) 1.183 1.149 0.957 (D4s-d4s) / CT4 4.444 2.682 4.244 D2m / EP12 11.315 10.699 11.569

[0140] like FIG. 14A to FIG. 14C The figure shows the optical parameters corresponding to the lens assembly of the optical lens in the above-mentioned embodiment 1 of the present application, including an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve. It can be seen that the optical lens in embodiment 1 can have good imaging quality.

[0141] Example 2 (Examples 2-1, 2-2, 2-3)

[0142] Table 7 is the parameters of each lens of the optical lens in Example 2 of the present application

[0143] Face number Surface type Radius of curvature thickness Material Cone coefficient OBJ Spherical endless endless S1 Aspheric -2.5916 0.4759 1.55 55.92 0.0228 S2 Aspheric 9.5954 0.5137 0.0000 S3 Aspheric 2.9316 0.5902 1.62 25.93 -0.1094 S4 Aspheric 6.1806 0.1005 0.0000 STO Spherical endless 0.0618 S5 Aspheric 4.7613 0.6213 1.55 55.92 1.2888 S6 Aspheric -2.3479 0.2254 -1.1600 S7 Aspheric 4.6579 0.2700 1.68 19.24 0.0000 S8 Aspheric 3.0079 0.1542 0.8073 S9 Aspheric endless 1.1609 1.55 55.92 S10 Aspheric -0.7908 0.0349 -0.9891 S11 Aspheric 2.9073 0.5329 1.64 23.52 -0.6726 S12 Aspheric endless 0.5434 S13 Spherical endless 0.2100 1.52 64.17 S14 Spherical endless 0.5527 S14 Spherical endless 0.0000

[0144] Table 8 shows the surface parameters of each lens of the optical lens of Example 2 of the present application.

[0145]

[0146]

[0147] Table 9 is the basic data parameters of Example 2 Example 2

[0148]

[0149] Table 10 Basic data of the optical lenses in different embodiments

[0150]

[0151]

[0152] Table 11 shows the conditions in each conditional formula in Examples 1-9, which meet the conditions in the following table:

[0153] Conditional / Example 2-1 2-2 2-3 |d5s-d4s| / (2*Dr0910) 23.606 23.405 37.280 (DT62-DT61) / (2*Dr12) 18.787 18.787 18.787 (D0s-d1s) / EP01 3.597 3.777 6.220 (d3s-d2m) / EP23 1.100 1.220 1.340 L / f 3.540 3.540 3.540 d0m / DT62 2.722 2.626 2.771 Yc51 / d5s 0.330 0.336 0.282 (D5m-d5m) / |SAG61| 12.733 12.222 7.388 EP01 / (CT1+T12) 1.142 1.122 0.652 d3m / R6 -0.733 -0.743 -0.766 EP45 / (CT4+T45) 1.603 1.579 1.089 (D4s-d4s) / CT4 11.917 11.741 7.908 D2m / EP12 8.580 6.852 6.638

[0154] like FIG. 15A to FIG. 15C The figure shows the optical parameters corresponding to the lens assembly of the optical lens described in the above-mentioned embodiment 2 of the present application, including an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve. It can be seen that the optical lens of embodiment 2 can have good imaging quality.

[0155] Embodiment 3 (including Embodiment 3-1, 3-2, 3-3)

[0156] Table 12 shows the parameters of each lens of the optical lens in Example 3 of the present application.

[0157]

[0158]

[0159] Table 13 shows the surface parameters of each lens of the optical lens of Example 3 of the present application.

[0160]

[0161] Table 14 Parameters of basic data in Example 3

[0162]

[0163] Table 15 Basic data of the optical lens of different embodiments (Examples 3-1, 3-2, 3-3)

[0164]

[0165]

[0166] Table 16 shows the conditions that each conditional formula in Examples 3-1, 3-2, and 3-3 satisfies the following table:

[0167] Conditional / Example 3-1 3-2 3-3 |d5s-d4s| / (2*Dr0910) 5.247 4.766 5.237 (DT62-DT61) / (2*Dr12) 3.658 3.658 3.658 (D0s-d1s) / EP01 0.844 0.848 0.762 (d3s-d2m) / EP23 -0.461 -0.675 -0.419 L / f 1.092 1.092 1.092 d0m / DT62 2.159 2.185 2.103 Yc51 / d5s 0.195 0.198 0.191 (D5m-d5m) / |SAG61| 1.970 1.404 3.252 EP01 / (CT1+T12) 0.880 0.879 0.881 d3m / R6 0.975 0.964 0.991 EP45 / (CT4+T45) 0.905 0.904 0.909 (D4s-d4s) / CT4 1.873 1.873 1.874 D2m / EP12 3.071 2.980 3.097

[0168] like FIG. 16A to FIG. 16C The figure shows the optical parameters corresponding to the lens assembly of the optical lens described in the above-mentioned embodiment 3 of the present application, including an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve. It can be seen that the optical lens of embodiment 3 can have good imaging quality.

[0169] like Figures 2 to 10 The optical lenses of nine different embodiments (embodiments 1-1, 1-2, 1-3, 2-1, 2-2, 2-3, 3-1, 3-2, and 3-3) of the present application are shown, wherein specific parameters of the optical lenses of different embodiments are shown in the following table, wherein Table 7 and Table 8 show basic data information of the optical lenses of the above-mentioned different embodiments, and Table 9 shows that each conditional formula of the optical lenses of the above-mentioned different embodiments satisfies the conditions in the following table.

[0170] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. An optical lens, characterized in that: include: Lens tube; A lens group assembled in the lens barrel, wherein the lens group includes a first lens, a second lens, a third lens with positive power, a fourth lens, a fifth lens with positive power, and a sixth lens with positive power, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are sequentially arranged in the lens barrel from the object side to the imaging surface side along the direction of the optical axis of the optical lens; a spacer element group, wherein the spacer element group includes a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed between the image side surface of the fourth lens and the fifth lens and at least partially contacts the fourth lens, and the fifth spacer element is disposed between the image side surface of the fifth lens and the sixth lens and at least partially contacts the fifth lens; The fifth lens has a fifth lens platform, wherein the fifth lens platform is located on the object side or image side of the lens center of the fifth lens, Dr0910 is the half-aperture of the fifth lens platform of the fifth lens, wherein the optical lens satisfies the following parameter characteristics: 4.75<|d5s-d4s| / (2*Dr0910)<37.30; wherein d4s is the inner diameter of the plane of the side of the fourth spacer element perpendicular to the optical axis, and d5s is the inner diameter of the plane of the side of the fifth spacer element perpendicular to the optical axis.

2. The optical lens according to claim 1, wherein the sixth lens has a sixth lens small platform, wherein the sixth lens small platform is located on the image side of the lens center of the sixth lens, Dr12 is the radius of the sixth lens small platform of the sixth lens, and the optical lens meets the following technical features: 3.61<(DT62-DT61) / (2*Dr12)<18.80; in, DT61 is the maximum effective radius of the object side of the sixth lens, and DT62 is the maximum effective radius of the image side of the sixth lens.

3. The optical lens according to claim 2, wherein the spacer element group further comprises a first spacer element, and the first spacer element is arranged between the first lens and the second lens, and the optical lens meets the following technical characteristics: 0.40<(D0s-d1s) / EP01<6.25; in, D0s is the outer diameter of the plane of the object side end face of the lens barrel perpendicular to the optical axis, d1s is the inner diameter of the plane of the object side face of the first spacing element perpendicular to the optical axis, and EP01 is the spacing distance from the object side end face of the lens barrel to the object side face of the first spacing element along the optical axis.

4. The optical lens according to claim 2, wherein the optical lens satisfies the following technical characteristics: -0.70<(d3s-d2m) / EP23<1.35; in, d2m is the inner diameter of the plane of the image side of the spacer element perpendicular to the optical axis, d3s is the inner diameter of the plane of the object side of the spacer element perpendicular to the optical axis, and EP23 is the spacing distance between the image side of the spacer element and the object side of the spacer element along the optical axis.

5. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 1.05 <L / f<3.58; in, L is the maximum horizontal distance from the object side end surface of the lens barrel to its image side end surface along the optical axis direction, and f is the effective focal length of the optical imaging system.

6. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 2.10≤d0m / DT62<2.80; in, d0m is the inner diameter of a plane of the image side end surface of the lens barrel that is perpendicular to the optical axis, and DT62 is the maximum effective radius of the image side surface of the sixth lens.

7. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 0.15 <Yc51 / d5s<0.35; in, YC51 is the distance from the inflection point of the object side of the effective mirror of the fifth lens away from the optical axis to the optical axis, and d5s is the inner diameter of the plane of the object side surface of the fifth spacing element perpendicular to the optical axis.

8. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 1.40≤(D5m-d5m) / |SAG61|<12.75; in, d5m is the inner diameter of the plane of the image side surface of the fifth spacer element perpendicular to the optical axis, D5m is the outer diameter of the plane of the image side surface of the fifth spacer element perpendicular to the optical axis, and SAG61 is the axial distance between the intersection of the sixth lens object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the sixth lens object side surface.

9. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 0.60 <EP01 / (CT1+T12)<1.15; in, CT1 is the center thickness of the first lens on the optical axis, T12 is the air spacing between the first lens and the second lens on the optical axis, and EP01 is the spacing distance from the object side end face of the lens barrel to the object side face of the first spacing element along the optical axis.

10. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: -0.80 <d3m / R6<1.00; in, d3m is the inner diameter of the plane of the image side surface of the third spacing element perpendicular to the optical axis, and R6 is the curvature radius of the image side surface of the third lens.

11. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 0.90≤EP45 / (CT4+T45)≤1.60 in, EP45 is the spacing distance between the image side surface of the fourth spacing element and the object side surface of the fifth spacing element along the optical axis, CT4 is the center thickness of the fourth lens on the optical axis, and T45 is the air spacing between the fourth lens and the fifth lens on the optical axis.

12. The optical lens according to claim 2, wherein the optical lens meets the following technical characteristics: 1.85<(D4s-d4s) / CT4<11.95 in, d4s is the inner diameter of the plane of the side surface of the fourth spacer element perpendicular to the optical axis, D4s is the outer diameter of the plane of the side surface of the fourth spacer element perpendicular to the optical axis, and CT4 is the center thickness of the fourth lens on the optical axis.

13. The optical lens according to claim 2, wherein the spacer element group further comprises a second spacer element, wherein the second spacer element is disposed between the second lens and the third lens, and the optical lens meets the following technical features: 2.95 <D2m / EP12<11.60 in, D2m is the outer diameter of the plane of the image side surface of the second spacer element perpendicular to the optical axis, and EP12 is the spacing distance between the image side surface of the first spacer element and the object side surface of the second spacer element along the optical axis.

Images