Optical lens
By designing a small lens platform in the optical lens, the problem of controlling single-sided lens eccentricity in the existing technology is solved, which improves the assembly stability and imaging quality of the lens, and reduces production costs and cycle time.
Patent Information
- Application Number
- CN202423061988.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing optical lenses have difficulty effectively controlling single-sided eccentricity during processing and assembly, resulting in unstable optical performance and affecting image quality and production efficiency.
An optical lens was designed, in which the lens is equipped with a small platform. The small platform ensures that the lens is eccentric on one side, which can better identify the center position and control the eccentricity and tilt, optimize the surface shape and thickness changes, and improve the stability of the assembly process.
This technology enables the control of lens eccentricity and tilt during assembly, improving the overall performance stability and imaging quality of the lens while reducing production costs and time.
Smart Images
Figure CN223526560U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical technology field especially relates to an optical lens. BACKGROUND
[0002] In the development process of the optical lens, in the design stage, the aspheric effective diameter of the lens of the prior art optical lens presents a smooth structure. This structure has exposed some problems in long-term practice.
[0003] From the perspective of processing, the smooth aspheric effective diameter makes it difficult to accurately grasp the single-face eccentricity of the lens in the processing process. In precision optical processing, the control of single-face eccentricity is crucial, and if the single-face eccentricity cannot be effectively ensured within a reasonable range, the optical performance of the lens will be affected. Moreover, this smooth structure has no obvious positive effect on the optimization of the surface shape. In the processing process, it is necessary to constantly adjust the process parameters in order to obtain a better surface shape, but due to the lack of effective structural features, the optimization is difficult, often requiring a lot of time and effort, increasing the production cost and production cycle. In short, in terms of processing, it is difficult to effectively ensure the single-face eccentricity of the lens, and there is also a lack of strong support for the optimization of the surface shape.
[0004] During assembly, due to the smoothness of the aspheric effective diameter of the lens, it is difficult for the assembler to accurately identify the center position. In modern high-precision optical lens assembly, accurate determination of the center position is the key to ensuring the adsorption eccentricity. If the adsorption eccentricity cannot be ensured within a very small range, it will lead to a decline in the imaging quality of the lens and unstable optical performance. For example, there may be problems such as image blur, color distortion, distortion, etc., which seriously affect the actual use effect of the lens. Therefore, during the assembly process, due to the inability to accurately identify the center position, it is difficult to ensure the adsorption eccentricity, making the overall performance stability poor. In the assembly process of the prior art optical lens, it is difficult to ensure the eccentricity and tilt of the lens during the assembly process, resulting in a large variation in the surface shape and thickness of the lens after assembly, and unstable overall performance. On the other hand, for the prior art optical lens, it is difficult to identify the position of the center of the lens during the assembly process, and it is difficult to ensure the adsorption eccentricity, which further affects the stability of the overall performance.
[0005] In addition, in today's highly competitive optical market, the performance requirements for lenses are becoming 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 stable working conditions under different environmental conditions. However, the smooth structure of the prior art optical lens is not up to the task in meeting these requirements. SUMMARY
[0006] The utility model discloses a main advantage lies in providing an optical lens, wherein the lens of optical lens is equipped with small platform, small platform can effectively guarantee lens single -sided eccentricity, is favorable to the optimization of lens face type.
[0007] Another advantage of the utility model lies in providing an optical lens, wherein the position of the center can be better identified through the small platform, the eccentricity is guaranteed, and the stability of the overall performance is guaranteed.
[0008] Another advantage of the utility model lies in providing an optical lens, wherein the eccentricity and inclination of the lens during assembly can be controlled through the small platform of the lens, so that the variation of the face type and thickness of the lens after assembly is small, and the overall performance is relatively stable and discrete.
[0009] According to an aspect of the utility model, the optical lens of the utility model can achieve the foregoing objects and other objects and advantages, comprising:
[0010] A lens barrel;
[0011] A lens group assembled in the lens barrel, wherein 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 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 along the direction of the optical axis of the optical lens from the object side to the imaging surface side.
[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 spacer element is arranged between the image side of the fourth lens and the fifth lens and at least partially contacts the fourth lens, and the fifth spacer element is arranged between the image side of the fifth lens and the sixth lens and at least partially contacts the fifth lens.
[0014] The fifth lens has a fifth lens small platform, wherein the fifth lens small platform is located on the object side or the image side of the lens center of the fifth lens, Dr0910 is the half radius of the fifth lens small platform of the fifth lens, and the optical lens satisfies the following parameter characteristics:
[0015] 4.75 < |d5s-d4s| / (2*Dr0910) < 37.30; wherein d4s is an inner diameter of the fourth spacer element object side face perpendicular to the plane of the optical axis, and d5s is an inner diameter of the fifth spacer element object side face perpendicular to the plane of the optical axis.
[0016] According to an embodiment of the present application, 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 satisfies the following technical features:
[0017] 3.61 < (DT62-DT61) / (2*Dr12) < 18.80;
[0018] wherein DT61 is the maximum effective radius of the object side face of the sixth lens, and DT62 is the maximum effective radius of the image side face of the sixth lens.
[0019] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0020] 0.40 < (D0s-d1s) / EP01 < 6.25;
[0021] wherein D0s is the outer diameter of the object side end face of the lens barrel perpendicular to the plane of the optical axis, d1s is the inner diameter of the object side face of the spacer element perpendicular to the plane of the optical axis, and EP01 is the interval distance from the object side end face of the lens barrel to the object side face of the spacer element along the optical axis direction.
[0022] According to an embodiment of the present application, the optical lens satisfies the following technical features: -0.70 < (d3s-d2m) / EP23 < 1.35;
[0023] wherein d2m is the inner diameter of the image side face of the spacer element perpendicular to the plane of the optical axis, d3s is the inner diameter of the object side face of the spacer element perpendicular to the plane of the optical axis, and EP23 is the interval distance from the image side face of the spacer element to the object side face of the spacer element along the optical axis direction.
[0024] According to an embodiment of the present application, the optical lens satisfies the following technical features: 1.05 < L / f < 3.58;
[0025] wherein L is the maximum horizontal distance from the object side end face of the lens barrel to the image side end face thereof along the optical axis direction, and f is the effective focal length of the optical imaging system.
[0026] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0027] 2.10 < dOm / DT62 < 2.80;
[0028] wherein dOm is an inner diameter of an image-side end surface of the lens barrel perpendicular to a plane of the optical axis, and DT62 is a maximum effective radius of an image-side surface of the sixth lens.
[0029] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0030] 0.15 < YC51 / d5s < 0.35;
[0031] wherein YC51 is a distance from a cusp of the effective lens of the fifth lens away from the optical axis to the optical axis, and d5s is an inner diameter of an object-side surface of the fifth spacer element perpendicular to a plane of the optical axis.
[0032] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0033] 1.40 < (D5m-d5m) / |SAG61| < 12.75;
[0034] wherein d5m is an inner diameter of an image-side surface of the fifth spacer element perpendicular to a plane of the optical axis, D5m is an outer diameter of the image-side surface of the fifth spacer element perpendicular to a plane of the optical axis, and SAG61 is an on-axis distance between a cusp of the effective lens of the sixth lens and a cusp of the effective lens of the sixth lens.
[0035] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0036] 0.60 < EP01 / (CT1+T12) < 1.15;
[0037] wherein CT1 is a central thickness of the first lens on the optical axis, T12 is an air gap of the first lens and the second lens on the optical axis, and EP01 is a separation distance from an object-side end surface of the lens barrel to an object-side surface of the first spacer element along the optical axis.
[0038] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0039] -0.80 < d3m / R6 < 1.00;
[0040] wherein d3m is an inner diameter of an image-side surface of the third spacer element perpendicular to a plane of the optical axis, and R6 is a radius of curvature of the image-side surface of the third lens.
[0041] According to an embodiment of the present application, the optical lens satisfies the following technical features:
[0042] 0.90 < EP45 / (CT4+T45) < 1.60
[0043] wherein EP45 is a separation distance in the direction of the optical axis of the image-side surface of the fourth spacer element and the object-side surface of the fifth spacer element, CT4 is a center thickness of the fourth lens in the optical axis, and T45 is an air separation of the fourth lens and the fifth lens in the optical axis.
[0044] According to one embodiment of the present application, the optical lens satisfies the following technical features:
[0045] 1.85 < (D4s-d4s) / CT4 < 11.95
[0046] wherein d4s is an inner diameter of the object-side surface of the fourth spacer element perpendicular to the plane of the optical axis, D4s is an outer diameter of the object-side surface of the fourth spacer element perpendicular to the plane of the optical axis, and CT4 is a center thickness of the fourth lens in the optical axis.
[0047] According to one embodiment of the present application, the optical lens satisfies the following technical features:
[0048] 2.95 < D2m / EP12 < 11.60
[0049] wherein D2m is an outer diameter of the image-side surface of the second spacer element perpendicular to the plane of the optical axis, and EP12 is a separation distance in the direction of the optical axis of the image-side surface of the first spacer element and the object-side surface of the second spacer element.
[0050] Further objects and advantages will be more fully understood from the following description of the presently preferred embodiments and practices of the present application together with the accompanying drawings.
[0051] These and other objects, features and advantages of the present application will be more fully understood from the following detailed description of the application taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0052] The technical solutions of the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the drawings, the same reference signs are used to represent the same components unless otherwise specified. Among them:
[0053] Figure 1 is a structural schematic view of an optical lens according to one preferred embodiment of the present application.
[0054] Figure 2 is a size schematic view of the optical lens according to the above embodiment 1-1 of the present application.
[0055] Figure 3 is a structural schematic view of an optical lens according to embodiment 1-2 of the present application.
[0056] Figure 4 is a structural schematic diagram of an optical lens according to Embodiment 1-3 of the present application.
[0057] Figure 5 is a structural schematic diagram of an optical lens according to Embodiment 2-1 of the present application.
[0058] Figure 6 is a structural schematic diagram of an optical lens according to Embodiment 2-2 of the present application.
[0059] Figure 7 is a structural schematic diagram of an optical lens according to Embodiment 2-3 of the present application.
[0060] Figure 8 is a structural schematic diagram of an optical lens according to Embodiment 3-1 of the present application.
[0061] Figure 9 is a structural schematic diagram of an optical lens according to Embodiment 3-2 of the present application.
[0062] Figure 10 is a structural schematic diagram of an optical lens according to Embodiment 3-3 of the present application.
[0063] Figure 11A and Figure 11B is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens in the simulation assembly according to the above embodiment of the present application.
[0064] Figure 12A and Figure 12B is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens in the simulation assembly according to another embodiment of the present application.
[0065] Figure 13A and Figure 13B is a deformation diagram of the fifth lens and an overall deformation diagram of the optical lens in the simulation assembly according to another embodiment of the present application.
[0066] Figures 14A to 14C is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens according to an embodiment of the present application.
[0067] Figures 15A to 15C is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens according to another embodiment of the present application.
[0068] Figures 16A to 16C is an axial chromatic aberration curve, an astigmatism curve and a magnification chromatic aberration curve of the optical lens according to another embodiment of the present application. DETAILED DESCRIPTION
[0069] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments in the following description are only examples, and other obvious modifications can be thought of by those skilled in the art. The basic principles defined in the following description can be applied to other embodiments, modifications, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.
[0070] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.
[0071] It can 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 one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.
[0072] Referring to the drawings of the present application Figures 1 to 16C As shown in the drawings, an optical lens according to the present application is illustrated in the following description. The optical lens includes a lens barrel P0 and a lens group E assembled in the lens barrel P0, wherein the lens group E includes a first lens E1, a second lens E2, a third lens E3 with positive refractive power, a fourth lens E4, a fifth lens E5 with positive refractive power, and a sixth lens E6 with positive refractive 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 the lens barrel P0 in order 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 surface P02, an image side end surface P03, an outer annular surface P04 and an inner annular surface P05, wherein the object side end surface P02 of the lens P0 faces the object side, the image side end surface 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 comprises a spacer element group P, wherein the spacer element group P is arranged in the lens barrel P0, and the spacer element group P is arranged between each adjacent lens of the lens group E, so that there is an air gap between each adjacent lens of the lens group E. The spacer element group P comprises 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 arranged between the first lens E1 and the second lens E2, the second spacer element P2 is arranged between the third lens E3 and the second lens E2, the third spacer element P3 is arranged between the third lens E3 and the fourth lens E4, the fourth spacer element P4 is arranged between the fourth lens E4 and the fifth lens E5, and the fifth spacer element P5 is arranged 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 image 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 image 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 image 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 image 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 image 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 image 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 image side.
[0075] The fourth spacer element P4 is arranged between the image side surface of the fourth lens E4 and the fifth lens E5 and at least partially contacts the fourth lens E4, and the fifth spacer element P5 is arranged between the image side surface of the fifth lens E5 and the sixth lens E6 and at least partially contacts 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 the image side of the lens center of the fifth lens E5, and Dr0910 is the half radius of the fifth lens small platform E51 of the fifth lens E5, that is, the maximum half radius of the small platform located on the optical axis position and perpendicular to the optical axis on the object side or the image side of the fifth lens E5, 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 fourth spacer element P4 object side surface perpendicular to the plane of the optical axis, and d5s is the inner diameter of the fifth spacer element P5 object side surface perpendicular to the plane of the optical axis. It is worth mentioning that the fifth lens small platform E51 arranged at the lens center of the fifth lens E5 can effectively ensure the eccentricity of the fifth lens E5.
[0079] For the optical lens, since the fifth lens E5 is a more sensitive lens, by effectively controlling the ratio of |d5s-d4s| and Dr0910, the eccentricity and tilt of the fifth lens E5 during assembly can be ensured, so that the change amount of the surface shape and thickness of the fifth lens E5 is small when the assembly of the fifth lens E5 is completed, and the overall performance is relatively stable and discrete.
[0080] As shown in Figure 11A and Figure 11B When |d5s-d4s| / (2*Dr0910)=10, by simulating the process of completing the assembly after the suction nozzle adsorbs the fifth lens E5 in the actual assembly, 20N of force is applied on the suction nozzle, the overall deformation diagram of the optical lens and the deformation diagram of the fifth lens E5 are obtained. As shown in Figure 12A and Figure 12B When |d5s-d4s| / (2*Dr0910)=1, the overall deformation diagram of the optical lens and the deformation of the fifth lens E5 are obtained. As shown in Figure 13A and Figure 13B When |d5s-d4s| / (2*Dr0910)=40, the overall deformation diagram of the optical lens and the deformation of the fifth lens E5 are obtained. According to the simulation, when the above condition is met, the deformation amount of the fifth lens E5 is the smallest, the overall deformation of the optical lens is relatively small, and the influence 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 perpendicular to the optical axis and located on the optical axis position on the image side of the sixth lens E6. The optical lens satisfies the following technical features:
[0082] 3.61 < (DT62-DT61) / (2*Dr12) < 18.80;
[0083] Wherein, DT61 is the maximum effective radius of the sixth lens object side S11, DT62 is the maximum effective radius of the sixth lens image side S12. It is worth mentioning that by controlling the ratio of (DT62-DT61) and (2*Dr12), on the one hand, the single surface eccentricity of the sixth lens E6 can be effectively guaranteed; on the other hand, the position of the center can be better identified through the small platform E61 of the sixth lens in the assembly process, so as to guarantee the adsorption eccentricity and the stability of the overall performance.
[0084] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0085] 0.40<(D0s-d1s) / EP01<6.25;
[0086] Wherein, D0s is the outer diameter of the object side end surface P02 of the lens barrel P0 perpendicular to the plane of the optical axis, d1s is the inner diameter of the object side surface of the spacing element P1 perpendicular to the plane of the optical axis, and EP01 is the spacing distance from the object side end surface P02 of the lens barrel P0 to the object side surface of the spacing element P1 along the optical axis direction.
[0087] It is worth mentioning that D0s-d1s is the front end surface length of the lens barrel, and EP01 is the front end wall thickness of the lens barrel and the edge thickness of the first lens E1. The front end surface length is actually the length of the bearing surface of the assembly, and by controlling the ratio of D0s-d1s to EP01, the strength of the first lens E1 and the lens barrel P0 is improved 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 hole, and the imaging quality of the optical lens is improved as a whole.
[0088] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features: -0.70<(d3s-d2m) / EP23<1.35;
[0089] Wherein, d2m is the inner diameter of the image side surface of the spacing element P2 perpendicular to the plane of the optical axis, d3s is the inner diameter of the object side surface of the spacing element P3 perpendicular to the plane of the optical axis, and EP23 is the spacing distance from the image side surface of the spacing element P2 to the object side surface of the spacing element P3 along the optical axis direction.
[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 of 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, which causes lens eccentricity and tilt. By controlling the ratio of d3s-d2m and EP23, the stability of the third lens E3 in the assembly process can be effectively guaranteed.
[0091] Preferably, in one specific example of the present application, the optical lens satisfies 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 to the image side end surface P03 of the lens barrel P0 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, and the overall height of the lens can be effectively controlled by controlling the ratio of L / f, so that the entire optical lens can be within the height range of the lens barrel, so that the front and rear lenses do not protrude from the lens barrel P0, and the appearance yield during assembly is guaranteed.
[0094] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0095] 2.10 < d0m / DT62 < 2.80;
[0096] Wherein, d0m is the inner diameter of the image side end surface P02 of the lens barrel P0 perpendicular to the plane of the optical axis, and DT62 is the maximum effective radius of the sixth lens image side 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, and when the image surface is fixed, the maximum semi-oral radius 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 rear end inclined surface of the lens barrel, thereby effectively improving the imaging quality.
[0098] Preferably, in one specific example of the present application, the optical lens satisfies 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 fifth lens E5 effective mirror to the optical axis, and d5s is the inner diameter of the object side surface of the fifth spacer element P5 perpendicular to the plane of the optical axis.
[0101] It is worth mentioning that by effectively ensuring the ratio of YC51 / d5s, the distance between the effective edge structure of the fifth lens E5 and the spacer can be ensured. The smaller the gap, the more effectively it can prevent excess light from entering, resulting in stray light phenomenon, and improving the imaging quality of the lens.
[0102] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0103] 1.40 < (D5m - d5m) / |SAG61| < 12.75;
[0104] wherein d5m is the inner diameter of the fifth spacer element P5 perpendicular to the plane of the optical axis, D5m is the outer diameter of the fifth spacer element P5 perpendicular to the plane of the optical axis, and SAG61 is the on-axis distance between the intersection of the sixth lens object side surface S11 and the optical axis to the effective radius vertex of the sixth lens object side surface S12 of the sixth lens E6.
[0105] It is worth mentioning that (D5m - d5m) is the bearing length of the fifth spacer element P5, and SAG61 is the front sag of the sixth lens E6. By controlling the ratio of (D5m - d5m) / |SAG61|, the bearing length of the fifth spacer element P5 is sufficient to effectively reduce the change of air gap five in the assembly process, and ensure the stability of the assembly performance.
[0106] Preferably, in one specific example of the present application, the optical lens satisfies 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 gap of the first lens E1 and the second lens E2 on the optical axis, and EP01 is the interval distance from the lens barrel object side end surface P02 to the first spacer element P1 object side surface in the direction of the optical axis.
[0109] It is worth mentioning that EP01 is the head thickness of the lens barrel P0 and the edge thickness of the first lens E1, and CT1 + T12 is the medium thickness of the first lens E1 and the gap. 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 ensured, the deformation of the lens barrel P0 and the first lens E1 in the assembly process is reduced, and in addition, the gap one is also a sensitive gap. The stability of the air gap ensures the stability of the overall performance.
[0110] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0111] -0.80 < d3m / R6 < 1.00;
[0112] wherein d3m is the inner diameter of the third spacer element P3 perpendicular to the plane of the optical axis, and R6 is the curvature radius of the third lens image side surface S6.
[0113] It is worth mentioning that the 2 surface curvature of the third lens E3 has a great influence on the internal stray light of the third lens E3, and by controlling d3m / R6, the inner diameter of the third spacing element P3 can effectively improve the internal stray light of the third lens E3.
[0114] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0115] 0.90≤EP45 / (CT4+T45)≤1.60
[0116] Wherein, EP45 is the interval distance between the image side surface of the fourth spacing element P4 and the object side surface of the fifth spacing element P5 in the direction along the optical axis, CT4 is the center thickness of the fourth lens E4 on the optical axis, and T45 is the air interval of 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, and by controlling the ratio of EP45 to (CT4+T45), the fifth lens E5 has large thickness and high strength during assembly, which can effectively ensure the change amount of the fourth lens E4 and the air gap four, and ensure the stability of the assembly performance.
[0118] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0119] 1.85<(D4s-d4s) / CT4<11.95
[0120] Wherein, d4s is the inner diameter of the object side surface of the fourth spacing element P4 perpendicular to the plane of the optical axis, D4s is the outer diameter of the object side surface of the fourth spacing element P4 perpendicular to the plane of 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 length of the bearing surface of the fourth spacing element P4, and by controlling the ratio of (D4s-d4s) to CT4, the deformation amount of the fourth lens E4 during assembly can be effectively reduced, and the stability of the assembly performance is ensured.
[0122] Preferably, in one specific example of the present application, the optical lens satisfies the following technical features:
[0123] 2.95<D2m / EP12<11.60
[0124] Wherein, D2m is the outer diameter of the image side surface of the second spacing element P2 perpendicular to the plane of the optical axis, and EP12 is the interval distance between the image side surface of the first spacing element P1 and the object side surface of the second spacing element P2 in the direction 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 lens E2 after the second spacer element P2, and by controlling the ratio of D2m / EP12, the edge thickness ratio of the outer diameter of the second lens E2 is indirectly controlled, which is used for preliminary evaluation of lens processing, and also ensures the stability of the lens in actual processing.
[0126] Tables 1 to 6 show specific examples of several different lens assemblies of the optical lens described in the present application.
[0127] Embodiment 1 (including Embodiment 1-1, 1-2, 1-3)
[0128] Table 1 is the parameter of each lens of the optical lens in Embodiment 1 of the present application
[0129]
[0130]
[0131] Table 2 is the surface parameter of each lens of the optical lens in Embodiment 1 of the present application
[0132]
[0133]
[0134] Table 3 is the basic data parameter of Embodiment 1
[0135]
[0136] Table 4 is the basic data of the optical lens in different embodiments (Embodiment 1-1, 1-2, 1-3)
[0137] Example / base 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 the condition of each condition in Embodiment 1-1, 1-2, 1-3 of the present application, which satisfies the following table:
[0139]
[0140]
[0141] As Figure 14A to 14C The optical parameters of the lens assembly corresponding to the optical lens in Embodiment 1 of the present application are shown, including the on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve, and it can be known that the optical lens in Embodiment 1 can have good imaging quality.
[0142] Embodiment 2 (Embodiment 2-1, 2-2, 2-3)
[0143] Table 7 is the parameter of each lens of the optical lens in Example 2 of the present application
[0144] Face number Surface type Curvature radius Thickness Material Conic constant OBJ Sphere Infinity Infinity S1 Asphere -2.5916 0.4759 1.55 55.92 0.0228 S2 Asphere 9.5954 0.5137 0.0000 S3 Asphere 2.9316 0.5902 1.62 25.93 -0.1094 S4 Asphere 6.1806 0.1005 0.0000 STO Sphere Infinity 0.0618 S5 Asphere 4.7613 0.6213 1.55 55.92 1.2888 S6 Asphere -2.3479 0.2254 -1.1600 S7 Asphere 4.6579 0.2700 1.68 19.24 0.0000 S8 Asphere 3.0079 0.1542 0.8073 S9 Asphere Infinity 1.1609 1.55 55.92 S10 Asphere -0.7908 0.0349 -0.9891 S11 Asphere 2.9073 0.5329 1.64 23.52 -0.6726 S12 Asphere Infinity 0.5434 S13 Sphere Infinity 0.2100 1.52 64.17 S14 Sphere Infinity 0.5527 S14 Sphere Infinity 0.0000
[0145] Table 8 is the surface type parameter of each lens of the optical lens in Example 2 of the present application
[0146]
[0147]
[0148] Table 9 is the basic data parameter of Example 2 of Example 2
[0149]
[0150] Table 10 is the basic data of the optical lens of different examples
[0151]
[0152]
[0153] Table 11 is the condition of each condition in Examples 1-9, which meets the following table:
[0154] Conditional expression / 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
[0155] As Figures 15A to 15C The optical parameters of the lens assembly corresponding to the optical lens in Example 2 of the present application are shown, including the on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve, it can be known that the optical lens in Example 2 can have good imaging quality.
[0156] Example 3 (including Example 3-1, 3-2, 3-3)
[0157] Table 12 is the parameter of each lens of the optical lens in Example 3 of the present application
[0158]
[0159]
[0160] Table 13 is the surface type parameter of each lens of the optical lens in Example 3 of the present application
[0161]
[0162] Table 14 is the basic data parameter of Example 3
[0163]
[0164] Table 15 is the basic data of the optical lens of different embodiments (Embodiment 3-1, 3-2, 3-3)
[0165] Example / base data 3-1 3-2 3-3 d1s 7.563 7.485 7.663 d2m 6.122 6.159 6.224 D2m 8.200 8.100 8.300 d3s 5.865 5.798 5.965 d3m 5.865 5.798 5.965 d4s 5.419 5.319 5.519 D4s 6.840 6.740 6.940 d5s 5.220 5.138 5.320 d5m 5.160 5.163 5.245 D5m 5.520 5.420 5.839 d0m 5.701 5.770 5.553 D0s 10.000 9.929 9.864 EP01 2.886 2.881 2.888 EP12 2.670 2.718 2.680 EP23 0.559 0.534 0.619 EP45 2.892 2.890 2.906 L 13.150 13.150 13.150
[0166] Table 16 is the condition formula of each condition of Embodiment 3-1, 3-2, 3-3
[0167] Conditional expression / 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] As shown in Figures 16A to 16C The optical parameters of the lens assembly of the optical lens of Embodiment 3 of the present application are shown, including the on-axis chromatic aberration curve, the astigmatism curve and the magnification chromatic aberration curve, and it can be known that the optical lens of Embodiment 3 can have good imaging quality.
[0169] As shown in Figures 2 to 10 The optical lens of nine different embodiments (Embodiment 1-1, 1-2, 1-3, 2-1, 2-2, 2-3, 3-1, 3-2, 3-3) of the present application are shown, wherein the specific parameters of the optical lens of different embodiments are shown in the following table, wherein Table 7 and Table 8 show the basic data information of the optical lens of the above different embodiments, and Table 9 shows the condition formula of each condition of the optical lens of the above different embodiments.
[0170] It should be understood by those skilled in the art that the embodiments of the present application shown in the above description and the drawings are only examples and do not limit the present application. The purpose of the present application has been completely and effectively achieved. The function and structural principle of the present application have been shown and explained in the embodiments, and the implementation of the present application can be any modification or change without departing from the principle.
Claims
1. An optical lens characterized in that, Comprising: a lens barrel; a lens group assembled in the lens barrel, wherein the lens group comprises a first lens, a second lens, a third lens with positive refractive power, a fourth lens, a fifth lens with positive refractive power, and a sixth lens with positive refractive 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 along a direction of an optical axis of the optical lens from an object side to an image plane side; a spacer element group, wherein the spacer element group comprises a fourth spacer element and a fifth spacer element, wherein the fourth spacer element is disposed between the fourth lens and the fifth lens on an image side of the fourth lens and at least partially contacts the fourth lens, and the fifth spacer element is disposed between the fifth lens and the sixth lens on an image side of the fifth lens and at least partially contacts the fifth lens; the fifth lens has a fifth lens small platform, wherein the fifth lens small platform is located on an object side or an image side of a lens center of the fifth lens, Dr0910 is a half radius of the fifth lens small platform of the fifth lens, and the optical lens satisfies the following parameter characteristics: 4.75<|d5s-d4s| / (2*Dr0910)<37.30; wherein d4s is an inner diameter of an object side surface of the fourth spacer element perpendicular to a plane of the optical axis, and d5s is an inner diameter of an object side surface of the fifth spacer element perpendicular to the plane of 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 an image side of a lens center of the sixth lens, Dr12 is a radius of the sixth lens small platform of the sixth lens, and the optical lens satisfies the following technical characteristics: 3.61<(DT62-DT61) / (2*Dr12)<18.80; wherein DT61 is a maximum effective radius of an object side surface of the sixth lens, and DT62 is a maximum effective radius of an image side surface of the sixth lens.
3. The optical lens according to claim 2, wherein the spacer element group further comprises a first spacer element disposed between the first lens and the second lens, and the optical lens satisfies the following technical characteristics: 0.40<(D0s-d1s) / EP01<6.25; wherein D0s is an outer diameter of an object side end surface of the lens barrel perpendicular to the plane of the optical axis, d1s is an inner diameter of an object side surface of the first spacer element perpendicular to the plane of the optical axis, and EP01 is a spacer distance between the object side end surface of the lens barrel and the object side surface of the first spacer element along the direction of 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; wherein d2m is an inner diameter of an image side surface of the spacer element perpendicular to the plane of the optical axis, d3s is an inner diameter of an object side surface of the spacer element perpendicular to the plane of the optical axis, and EP23 is a spacer distance between the image side surface of the spacer element and the object side surface of the spacer element along the direction of the optical axis.
5. The optical lens according to claim 2, wherein the optical lens satisfies the following technical feature: 1.05 < L / f < 3.58; L is the maximum horizontal distance of the lens barrel from the object side end surface to the image side end surface thereof along the optical axis direction, and f is the effective focal length of the optical imaging system. wherein 6. The optical lens according to claim 2, wherein the optical lens satisfies the following technical feature: 2.10 < dOm / Dt62 < 2.80; dOm is the inner diameter of the image side end surface of the lens barrel perpendicular to the plane of 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 satisfies the following technical feature: wherein 0.15 < YC51 / d5s < 0.35; YC51 is the distance from the inflection point of the object side surface of the effective lens of the fifth lens away from the optical axis to the optical axis, and d5s is the inner diameter of the object side surface of the fifth spacer element perpendicular to the plane of the optical axis.
8. The optical lens according to claim 2, wherein the optical lens satisfies the following technical feature: 1.40 < (D5m-d5m) / |SAG61| < 12.75; d5m is the inner diameter of the image side surface of the fifth spacer element perpendicular to the plane of the optical axis, D5m is the outer diameter of the image side surface of the fifth spacer element perpendicular to the plane of the optical axis, and SAG61 is the on-axis distance between the intersection of the object side surface of the sixth lens and the optical axis to the vertex of the effective radius of the object side surface of the sixth lens. wherein, 9. The optical lens according to claim 3, wherein the optical lens satisfies the following technical feature: 0.60 < EP01 / (CT1+T12) < 1.15; CT1 is the central thickness of the first lens on the optical axis, T12 is the air gap of the first lens and the second lens on the optical axis, and EP01 is the separation distance of the lens barrel object side end surface to the object side surface of the first spacer element along the optical axis direction. The spacer element group includes a third spacer element, which is spaced between the third lens and the fourth lens, and the optical lens satisfies the following technical feature: wherein -0.80 < d3m / R6 < 1.00; wherein d3m is the inner diameter of the image side surface of the third spacer element perpendicular to the plane of 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 satisfies the following technical feature: 0.90 < EP45 / (CT4+T45) < 1.60 EP45 is the separation distance of the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, CT4 is the central thickness of the fourth lens on the optical axis, and T45 is the air gap of the fourth lens and the fifth lens on the optical axis. wherein 12. The optical lens according to claim 2, wherein the optical lens satisfies the following technical feature:
10. The optical lens of claim 2, wherein, 1.85 < (D4s-d4s) / CT4 < 11.95 wherein wherein, d4s is an inner diameter of the fourth spacer element object side surface perpendicular to the plane of the optical axis, D4s is an outer diameter of the fourth spacer element object side surface perpendicular to the plane of the optical axis, CT4 is a center thickness of the fourth lens on the optical axis.
13. The optical lens of claim 3, wherein the set of spacer elements further comprises a second spacer element, wherein the second spacer element is arranged between the second lens and the third lens, the optical lens satisfying the following technical features: 2.95 < D2m / EP12 < 11.60 wherein D2m is an outer diameter of the second spacer element image side surface perpendicular to the plane of the optical axis, EP12 is a separation distance between the image side surface of the first spacer element and the object side surface of the second spacer element in the direction along the optical axis.