Optical photographic lens

Abstract

The embodiment of the utility model discloses an optical photographic lens, which comprises a lens barrel with an accommodating space, and a lens group and at least one spacing element which are accommodated in the lens barrel, the lens group comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with positive focal power and a sixth lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis; the at least one spacing element comprises a second spacing element which is positioned between the second lens and the third lens and is in direct contact with the image side of the second lens, and a third spacing element which is positioned between the third lens and the fourth lens and is in direct contact with the image side of the third lens; and a fourth spacer element located between the fourth lens and the fifth lens and in direct contact with the image side of the fourth lens.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to an optical photography lens comprising multiple lenses. Background Art

[0002] With the development and progress of society, the imaging quality of optical photography lenses has gradually become one of the important factors for users to choose photography cameras. In the existing technology, in order to improve the imaging quality, the image plane size is usually increased. When designing an optical photography lens, in order to match the image plane size, the lens size closer to the imaging plane is often larger, so that the last lens has a larger diameter, which is easy to form a large step difference structure, which can easily lead to problems such as unstable assembly and stray light, thereby affecting the imaging quality.

[0003] As mentioned above, current optical photography lenses often have at least one of the following problems: unstable assembly, easy occurrence of stray light, poor sensitivity of some lenses, etc. Therefore, how to optimize the structure of optical photography lenses to improve imaging quality has become a problem that needs to be solved urgently. Utility Model Content

[0004] According to one aspect of the present application, an optical photographic lens is provided, which includes a lens barrel with a housing space, and a lens group and at least one spacing element housed in the lens barrel, wherein the lens group includes: a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with positive focal power, and a sixth lens with negative focal power, which are arranged in sequence from the object side to the image side along the optical axis; and the at least one spacing element includes: a second spacing element located between the second lens and the third lens and in direct contact with the image side of the second lens, a spacing element located between the third lens and the fourth lens, and a spacing element located between the third lens and the fourth lens. A third spacer element is provided which is in direct contact with the image side of the third lens, and a fourth spacer element is provided which is located between the fourth lens and the fifth lens and in direct contact with the image side of the fourth lens, wherein the radius of curvature R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacer element, the effective focal length f3 of the third lens, the refractive index N3 of the third lens, the interval EP34 between the third spacer element and the fourth spacer element, and the air interval T34 on the optical axis between the third lens and the fourth lens satisfy: -5.5<R4 / D2m<-3.9; -35.0<f3*N3 / (EP34+T34)<-26.5.

[0005] In one or more embodiments, at least one spacer element also includes a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, and the curvature radius R10 of the image side surface of the fifth lens, the refractive index N5 of the fifth lens, and the inner diameter d5s of the object side surface of the fifth spacer element satisfy: -2.5<R10*N5 / d5s<-2.0.

[0006] In one or more embodiments, at least one spacer element also includes a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, and the effective focal length f5 of the fifth lens, the interval EP45 between the fourth spacer element and the fifth spacer element, and the air interval T56 on the optical axis between the fifth lens and the sixth lens satisfy: 3.0<f5 / (EP45+T56)<3.5.

[0007] In one or more embodiments, at least one spacer element also includes a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, and the maximum effective radius DT61 of the object side of the sixth lens, the outer diameter D5m of the image side of the fifth spacer element, and the inner diameter d5m of the image side of the fifth spacer element satisfy: 1.5<DT61 / (D5m-d5m)<2.5.

[0008] In one or more embodiments, at least one spacer element also includes a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, and the effective focal length f1 of the first lens, the inner diameter d1s of the object side of the first spacer element, and the curvature radius R2 of the image side of the first lens satisfy: 3.5<f1 / d1s+f1 / R2<4.0.

[0009] In one or more embodiments, at least one spacer element also includes a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, and the spacing EP01 between the front end surface of the lens barrel and the first spacer element, the maximum thickness CP1 of the first spacer element, and the center thickness CT1 of the first lens on the optical axis satisfy: 7.0<(EP01-CT1) / CP1<10.5.

[0010] In one or more embodiments, an outer diameter D3m of the image-side surface of the third spacer element and a maximum effective radius DT41 of the object-side surface of the fourth lens satisfy: 2.5<D3m / DT41<3.5.

[0011] In one or more embodiments, an outer diameter D3s of the object-side surface of the third spacer element and a maximum effective radius DT32 of the image-side surface of the third lens satisfy: 3.0<D3s / DT32<4.0.

[0012] In one or more embodiments, the outer diameter D4m of the image side surface of the fourth spacer element, the inner diameter d4m of the image side surface of the fourth spacer element, the maximum effective radius DT51 of the object side surface of the fifth lens, and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 3.5<(D4m-d4m) / (DT51-DT42)<5.6.

[0013] In one or more embodiments, at least one spacer element also includes a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens. The effective focal length f6 of the sixth lens, the radius of curvature R12 of the image side surface of the sixth lens, the maximum thickness CP5 of the fifth spacer element, and the inner diameter d0m of the rear end surface of the lens barrel closest to the image side satisfy: 24.0<|f6*R12| / (CP5*d0m)<33.0.

[0014] In one or more embodiments, a curvature radius R3 of the object-side surface of the second lens, a refractive index N2 of the second lens, and an inner diameter d2s of the object-side surface of the second spacer element satisfy: 8.5<R3*N2 / d2s<12.0.

[0015] In one or more embodiments, the curvature radius R5 of the object side surface of the third lens, the outer diameter D2s of the object side surface of the second spacer element, and the outer diameter D2m of the image side surface of the second spacer element satisfy: -108.0<R5 / (D2s+D2m)<-9.5.

[0016] In one or more embodiments, the curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacing element, the curvature radius R7 of the object side surface of the fourth lens, and the outer diameter D3m of the image side surface of the third spacing element satisfy: 7.5<R6 / D3s+R7 / D3m≤15.0.

[0017] In one or more embodiments, a radius of curvature R8 of the image-side surface of the fourth lens element and an inner diameter d4s of the object-side surface of the fourth spacer element satisfy: 2.0<R8 / d4s<3.0.

[0018] In one or more embodiments, at least one spacer element also includes a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, the axial distance SAG61 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, and the maximum thickness CP5 of the fifth spacer element satisfies: 47.5<|SAG61 / CP5|<67.0.

[0019] In one or more embodiments, the combined focal length f56 of the fifth lens and the sixth lens and the maximum height L of the lens barrel along the optical axis direction satisfy: 3.5<f56 / L<4.5.

[0020] In one or more embodiments, an effective focal length f4 of the fourth lens and an outer diameter D4s of the object-side surface of the fourth spacer element satisfy: -4.0<f4 / D4s<-3.0.

[0021] In one or more embodiments, at least one spacer element also includes a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, an air gap T12 on the optical axis between the first lens and the second lens, an air gap T23 on the optical axis between the second lens and the third lens, a maximum thickness CP1 of the first spacer element, and a maximum thickness CP3 of the third spacer element satisfy: 8.0<T23 / CP3+T12 / CP1<12.5.

[0022] According to another aspect of the present application, an optical photographic lens is provided, which includes a lens barrel with a accommodating space, and a lens group and at least one spacer element accommodated in the lens barrel, wherein the lens group includes: a first lens with positive optical focal length, a second lens with positive optical focal length, a third lens with negative optical focal length, a fourth lens with negative optical focal length, a fifth lens with positive optical focal length and a sixth lens with negative optical focal length, which are arranged in sequence from the object side to the image side along the optical axis; and the at least one spacer element includes a first spacer element located between the first lens and the second lens and directly in contact with the image side of the first lens, wherein the effective focal length f1 of the first lens, the inner diameter d1s of the object side surface of the first spacer element, and the curvature radius R2 of the image side surface of the first lens satisfy: 3.5<f1 / d1s+f1 / R2<4.0.

[0023] According to another aspect of the present application, an optical photographic lens is provided, which includes a lens barrel with a accommodating space, and a lens group and at least one spacer element accommodated in the lens barrel, wherein the lens group includes: a first lens with positive optical focal length, a second lens with positive optical focal length, a third lens with negative optical focal length, a fourth lens with negative optical focal length, a fifth lens with positive optical focal length and a sixth lens with negative optical focal length, which are arranged in sequence from the object side to the image side along the optical axis; and the at least one spacer element includes a second spacer element located between the second lens and the third lens and directly in contact with the image side of the second lens, wherein the curvature radius R5 of the object side surface of the third lens, the outer diameter D2s of the object side surface of the second spacer element, and the outer diameter D2m of the image side surface of the second spacer element satisfy: -108.0<R5 / (D2s+D2m)<-9.5.

[0024] The optical photography lens provided by the present application includes a lens group and at least one spacer element, and the lens group may include six lenses with optical power, and also includes a lens barrel for accommodating the lens group and the spacer element. In order to improve the imaging size and the imaging quality at the same time, the overall outer diameter of the fourth lens is significantly larger than that of the third lens, so that the third lens assembly is more sensitive. The present application sets a second spacer element between the second lens and the third lens, a third spacer element between the third lens and the fourth lens, and a fourth spacer element between the fourth lens and the fifth lens, and controls the ratio of the radius of curvature of the image side surface of the second lens to the outer diameter of the image side surface of the second spacer element within the range of -5.5<R4 / D2m<-3.9; at the same time, the effective focal length, refractive index, interval between the third spacer element and the fourth spacer element of the third lens, and the air interval between the third lens and the fourth lens are controlled within the range of -35.0<f3*N3 / (EP34+T34)<-26.5, which is conducive to reducing the sensitivity of the third lens, improving the assembly stability, improving the field curvature change of the lens, and improving the imaging clarity of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 A schematic diagram showing the structure and some parameters of an optical photographic lens according to an embodiment of the present application is shown;

[0027] Figure 2 Another partial parameter schematic diagram of the optical photographic lens according to an embodiment of the present application is shown;

[0028] Figure 3A A schematic structural diagram of an optical photographic lens according to Embodiment 1 of the present application is shown;

[0029] Figure 3B A schematic structural diagram of an optical photographic lens according to Embodiment 2 of the present application is shown;

[0030] 4A to 4D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical photographic lens according to Example 1 and Example 2 of the present application are respectively shown;

[0031] Figure 5A A schematic structural diagram of an optical photographic lens according to Embodiment 3 of the present application is shown;

[0032] Figure 5B A schematic structural diagram of an optical photographic lens according to Embodiment 4 of the present application is shown;

[0033] FIG. 6A to FIG. 6DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical photographic lens according to Example 3 and Example 4 of the present application are respectively shown;

[0034] Fig. 7A A schematic structural diagram of an optical photographic lens according to Embodiment 5 of the present application is shown;

[0035] Figure 7B A schematic structural diagram of an optical photographic lens according to Embodiment 6 of the present application is shown;

[0036] FIG. 8A to FIG. 8D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical photographic lens according to Example 5 and Example 6 of the present application are respectively shown;

[0037] Fig.9A A schematic structural diagram of an optical photographic lens according to Embodiment 7 of the present application is shown;

[0038] Fig. 9B A schematic structural diagram of an optical photographic lens according to Embodiment 8 of the present application is shown; and

[0039] FIG. 10A to FIG. 10D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the optical photographic lenses according to Example 7 and Example 8 of the present application are respectively shown. DETAILED DESCRIPTION

[0040] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0042] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0043] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0044] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0045] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0046] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can be made, which all belong to the protection scope of the present application. For example, the lens groups (i.e., the first lens to the sixth lens), the lens barrel structure and the spacing elements in the embodiments of the present application can be arbitrarily combined, and are not limited to the lens group in one embodiment can only be combined with the lens barrel structure, spacing elements, etc. of the embodiment.

[0047] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Figure 1 The structure arrangement diagram of an optical photographic lens according to the present application and a schematic diagram of some parameters are shown. It should be understood by those skilled in the art that some parameters commonly used in the art, such as the center thickness CT1 of the first lens on the optical axis, the maximum height L of the lens barrel along the optical axis, etc., are not shown in the figure. Figure 1 It is shown in Figure 1 Only some parameters of the lens barrel and the spacer element of an optical photographic lens of the present application are shown as examples to facilitate a better understanding of the present invention. Figure 1 As shown, EP01 represents the spacing between the front end face of the lens barrel close to the object side and the object side face of the first spacing element along the optical axis; EP34 represents the spacing between the image side face of the third spacing element and the object side face of the fourth spacing element along the optical axis; EP45 represents the spacing between the image side face of the fourth spacing element and the object side face of the fifth spacing element along the optical axis; CP1 represents the maximum thickness of the first spacing element along the optical axis; CP5 represents the maximum thickness of the fifth spacing element along the optical axis; SAG61 represents the axial distance between the intersection of the object side face of the sixth lens and the optical axis to the vertex of the effective radius of the object side face of the sixth lens; d0m represents the inner diameter of the rear end face of the lens barrel close to the image side closest to the imaging surface; D1s represents the outer diameter of the object side face of the first spacing element; d1s represents the inner diameter of the object side face of the first spacing element; D1m represents the outer diameter of the image side face of the first spacing element; d1m represents the inner diameter of the image side face of the first spacing element; d2s represents the inner diameter of the object side face of the second spacing element; d2m represents the inner diameter of the image side face of the second spacing element, and so on.

[0048] Figure 2 FIG. 2 is a schematic diagram showing another part of the parameters of the optical photography lens of the present application. Figure 2 As shown, DT41 represents the maximum effective radius of the object side surface of the fourth lens; DT32 represents the maximum effective radius of the image side surface of the third lens; DT42 represents the maximum effective radius of the image side surface of the fourth lens; DT51 represents the maximum effective radius of the object side surface of the fifth lens; DT61 represents the maximum effective radius of the object side surface of the sixth lens, and so on.

[0049] The features, principles and other aspects of the present application are described in detail below.

[0050] refer to Figure 1 and Figure 2 As shown, the first aspect of the present application provides such an optical photography lens, which may include a lens barrel, a lens group and at least one spacing element, wherein the lens group and the one or more spacing elements are all accommodated in the lens barrel. The lens group may include six lenses with optical power, which are respectively a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens may have a spacing distance between them.

[0051] In an exemplary embodiment, the first lens may have positive optical power. The second lens may have positive optical power. The third lens may have negative optical power. The fourth lens may have negative optical power. The fifth lens may have positive optical power. The sixth lens may have negative optical power.

[0052] According to an exemplary embodiment of the present application, the optical photography lens includes at least one spacer element, for example, it may include a second spacer element located between the second lens and the third lens, and the second spacer element may be in contact with the non-optical area of ​​the image side of the second lens. For example, it may abut against the non-optical area of ​​the image side of the second lens.

[0053] According to an exemplary embodiment of the present application, at least one spacer element may further include any one or more of the following spacer elements: a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, a third spacer element located between the third lens and the fourth lens and in direct contact with the image side of the third lens, a fourth spacer element located between the fourth lens and the fifth lens and in direct contact with the image side of the fourth lens, and a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, etc. Exemplarily, the spacer element may include a spacer, a light shielding sheet, a spacer ring, or a pressure ring, etc. By reasonably setting the number, thickness, inner diameter, and outer diameter of the spacer element, it is helpful to block stray light, improve the imaging quality of the optical photography lens, and improve the assembly stability of the optical photography lens.

[0054] It should be understood that the surface of each spacer element closest to the object is called the object side surface of the spacer element, and the surface of each spacer element closest to the imaging surface is called the image side surface of the spacer element. The surface of the lens barrel closest to the object is called the object side end or front end of the lens barrel, and the surface of the lens barrel closest to the imaging surface is called the image side end or rear end of the lens barrel.

[0055] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formulas: -5.5<R4 / D2m<-3.9; -35.0<f3*N3 / (EP34+T34)<-26.5, wherein R4 is the radius of curvature of the image side surface of the second lens, D2m is the outer diameter of the image side surface of the second spacer element, f3 is the effective focal length of the third lens, EP34 is the interval between the third spacer element and the fourth spacer element, T34 is the air interval between the third lens and the fourth lens on the optical axis, and N3 is the refractive index of the third lens. By controlling the radius of curvature of the image side of the second lens, the optical path length of the second lens can be improved and the optical performance can be enhanced; by controlling the ratio of the radius of curvature of the image side of the second lens to the outer diameter of the image side of the second spacing element, it is beneficial to improve the imaging quality of the second lens while optimizing the structure of the second lens; by controlling the product of the effective focal length and the refractive index of the third lens, the dispersion of the lens can be improved while improving the imaging size of the lens, thereby improving the imaging quality; by controlling the sum of the interval between the third spacing element and the fourth spacing element and the air interval on the optical axis, it is beneficial to improve the assembly stability, improve the field curvature change of the lens, and improve the imaging clarity of the lens while optimizing the structure of the fourth lens.

[0056] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: -2.5<R10*N5 / d5s<-2.0, wherein R10 is the radius of curvature of the image side surface of the fifth lens, N5 is the refractive index of the fifth lens, and d5s is the inner diameter of the object side surface of the fifth spacer element. By controlling the product of the radius of curvature of the image side surface of the fifth lens and the refractive index of the fifth lens, the dispersion can be reduced and the optical quality can be improved while improving the optical path length of the fifth lens and improving the optical performance, and by controlling the ratio to the inner diameter of the object side surface of the fifth spacer element, the amount of light passing through the fifth lens can be controlled while improving the optical quality, and the stray light of the fifth lens can be improved.

[0057] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.0<f5 / (EP45+T56)<3.5, wherein f5 is the effective focal length of the fifth lens, EP45 is the interval between the fourth spacer element and the fifth spacer element, and T56 is the air interval between the fifth lens and the sixth lens on the optical axis. The size of the lens image can be controlled by controlling the effective focal length of the fifth lens, and the sum of the interval between the fourth spacer element and the fifth spacer element and the air interval between the fifth lens and the sixth lens on the optical axis can be controlled to optimize the structure of the fifth lens, thereby improving the field curvature of the lens and the clarity of the lens image while improving the assembly stability.

[0058] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 1.5<DT61 / (D5m-d5m)<2.5, wherein DT61 is the maximum effective radius of the object side of the sixth lens, D5m is the outer diameter of the image side of the fifth spacing element, and d5m is the inner diameter of the image side of the fifth spacing element. By controlling the ratio of the maximum effective radius of the object side of the sixth lens to the difference between the outer diameter and the inner diameter of the image side of the fifth spacing element, the risk of stray light caused by the sudden rise of light is reduced, and while improving the smooth passage of light through the sixth lens, the structure of the sixth lens is optimized, thereby improving the imaging quality of the optical photography lens.

[0059] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.5<f1 / d1s+f1 / R2<4.0, wherein f1 is the effective focal length of the first lens, R2 is the radius of curvature of the image side surface of the first lens, and d1s is the inner diameter of the object side surface of the first spacing element. By controlling the effective focal length of the first lens, the size of the lens imaging can be controlled. By controlling the inner diameter of the object side surface of the first spacing element and the radius of curvature of the image side surface of the first lens, the imaging quality can be improved while reducing the generation of stray light, improving the optical path length, and enhancing the optical performance.

[0060] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 7.0<(EP01-CT1) / CP1<10.5, wherein EP01 is the interval between the front end face of the lens barrel and the first spacing element, CP1 is the maximum thickness of the first spacing element, and CT1 is the center thickness of the first lens on the optical axis. By controlling the difference between the interval between the front end face of the lens barrel and the first spacing element and the center thickness of the first lens on the optical axis, the structure of the front end face of the lens barrel can be optimized while improving the field curvature; by controlling the ratio between the difference and the maximum thickness of the first spacing element, the overall structure of the lens can be optimized and the assembly stability can be improved.

[0061] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 2.5<D3m / DT41<3.5, wherein D3m is the outer diameter of the image side surface of the third spacer element, and DT41 is the maximum effective radius of the object side surface of the fourth lens. By controlling the ratio of the outer diameter of the image side surface of the third spacer element to the maximum effective radius of the object side surface of the fourth lens, the structure of the fourth lens and the effective portion ratio may be optimized, making the structure of the fourth lens more reasonable.

[0062] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.0<D3s / DT32<4.0, wherein D3s is the outer diameter of the object side surface of the third spacer element, and DT32 is the maximum effective radius of the image side surface of the third lens. By controlling the ratio of the outer diameter of the object side surface of the third spacer element to the maximum effective radius of the image side surface of the third lens, the structure of the third lens and the effective portion ratio may be optimized, making the structure of the third lens more reasonable.

[0063] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.5<(D4m-d4m) / (DT51-DT42)<5.6, wherein D4m is the outer diameter of the image side surface of the fourth spacer element, d4m is the inner diameter of the image side surface of the fourth spacer element, DT42 is the maximum effective radius of the image side surface of the fourth lens, and DT51 is the maximum effective radius of the object side surface of the fifth lens. By controlling the ratio of the difference between the outer diameter and the inner diameter of the image side of the fourth spacer element and the maximum effective radius of the object side of the fifth lens and the maximum effective radius of the image side of the fourth lens, the relative position of the spacer element and the effective aperture can be reflected, making the lens structure more reasonable, while controlling the amount of light passing through the fourth lens and the fifth lens, avoiding the generation of stray light, and improving the photography capability of the lens.

[0064] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 24.0<|f6*R12| / (CP5*d0m)<33.0, wherein f6 is the effective focal length of the sixth lens, R12 is the radius of curvature of the image side surface of the sixth lens, CP5 is the maximum thickness of the fifth spacing element, and d0m is the inner diameter of the rear end surface of the lens barrel closest to the imaging surface. By controlling the product of the effective focal length of the sixth lens and the radius of curvature of the image side surface of the sixth lens, the optical path length of the light passing through the sixth lens can be improved while controlling the imaging size of the lens, thereby improving the optical performance; by controlling the product of the maximum thickness of the fifth spacing element and the inner diameter of the rear end of the lens barrel, the overall size of the rear end of the lens barrel can be controlled, making the structure more reasonable.

[0065] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 8.5<R3*N2 / d2s<12.0, wherein R3 is the radius of curvature of the object side surface of the second lens, N2 is the refractive index of the second lens, and d2s is the inner diameter of the object side surface of the second spacer element. By controlling the product of the radius of curvature of the object side surface of the second lens and the refractive index of the second lens, the imaging trajectory of the light incident on the second lens can be improved, and by controlling the inner diameter of the object side surface of the second spacer element, the amount of light passing through the second lens can be controlled, thereby improving dispersion and avoiding the generation of excess stray light.

[0066] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: -108.0<R5 / (D2s+D2m)<-9.5, wherein D2s is the outer diameter of the object side surface of the second spacer element, D2m is the outer diameter of the image side surface of the second spacer element, and R5 is the radius of curvature of the object side surface of the third lens. By controlling the radius of curvature of the object side surface of the third lens, the length of the light passing through the third lens can be improved, and the optical performance can be improved. By controlling the sum of the outer diameter of the object side surface of the second spacer element and the outer diameter of the image side surface of the second spacer element, the overall size of the second lens and the third lens can be controlled, and the overall structure can be improved. At the same time, by controlling the outer diameter dimensions of both sides of the second spacer element, it is beneficial to improve the stability of the lens assembly, improve the stray light state, and improve the imaging quality and reliability quality.

[0067] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 7.5<R6 / D3s+R7 / D3m≤15.0, wherein R6 is the radius of curvature of the image side surface of the third lens, R7 is the radius of curvature of the object side surface of the fourth lens, D3s is the outer diameter of the object side surface of the third spacing element, and D3m is the outer diameter of the image side surface of the third spacing element. By controlling the radius of curvature of the image side surface of the third lens and the object side surface of the fourth lens, the optical length of the lens exiting the third lens and entering the fourth lens can be improved, and the optical performance can be improved. By controlling the outer diameters of the object side surface and the image side surface of the third spacing element, the size of the lens barrel can be controlled, making the structure more reasonable, and avoiding the generation of stray light.

[0068] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 2.0<R8 / d4s<3.0, wherein d4s is the inner diameter of the object side surface of the fourth spacer element, and R8 is the curvature radius of the image side surface of the fourth lens. By controlling the curvature radius of the image side surface of the fourth lens, the optical path length can be controlled to improve the optical performance, and by controlling the inner diameter of the object side surface of the fourth spacer element, the amount of light passing through the fourth lens can be controlled to avoid the generation of stray light.

[0069] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 47.5<|SAG61 / CP5|<67.0, wherein SAG61 is the axial 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, and CP5 is the maximum thickness of the fifth spacing element. By controlling the axial distance between the intersection of the object side surface of the sixth lens and the optical axis and the vertex of the effective radius of the object side surface of the sixth lens, the shape of the sixth lens can be controlled, and the molding of the sixth lens can be improved. By controlling the maximum thickness of the fifth spacing element, the position of the sixth lens can be adjusted, making the assembly more reasonable.

[0070] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.5<f56 / L<4.5, wherein f56 is the combined focal length of the fifth lens and the sixth lens, and L is the maximum height of the lens barrel along the optical axis. The combined focal length reflects the imaging size of the fifth lens and the sixth lens, and the maximum height of the lens barrel reflects the overall size of the lens, which is conducive to miniaturization while ensuring imaging performance.

[0071] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: -4.0<f4 / D4s<-3.0, wherein f4 is the effective focal length of the fourth lens, and D4s is the outer diameter of the object side of the fourth spacing element. The imaging size of the fourth lens can be improved by controlling the effective focal length of the fourth lens, and the overall size of the fourth lens can be controlled by controlling the outer diameter of the object side of the fourth spacing element, thereby optimizing the structure of the fourth lens, improving assembly stability, and improving lens quality.

[0072] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 8.0<T23 / CP3+T12 / CP1<12.5, wherein T12 is the air spacing between the first lens and the second lens on the optical axis, T23 is the air spacing between the second lens and the third lens on the optical axis, CP1 is the maximum thickness of the first spacing element, and CP3 is the maximum thickness of the third spacing element. Satisfying this conditional formula, by reasonably controlling the ratio of the air spacing between the first lens and the second lens on the optical axis to the maximum thickness of the first spacing element, and the ratio of the air spacing between the second lens and the third lens on the optical axis to the maximum thickness of the third spacing element, is conducive to making the lens structure more reasonable, improving the stability of the lens, and effectively avoiding stray light inside the lens, thereby improving the imaging quality.

[0073] refer to Figure 1 and Figure 2 As shown, the second aspect of the present application provides such an optical photographic lens, which may include a lens barrel, a lens group and at least one spacer element, wherein the lens group and the one or more spacer elements are all contained in the lens barrel. The lens group may include six lenses with optical focal lengths, which are respectively a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens may have a spacing distance between them. The optical photographic lens also includes at least one spacer element, for example, it may include a first spacer element located between the first lens and the second lens, the first spacer element may contact the non-optical area of ​​the image side of the first lens, and illustratively, it may abut against the non-optical area of ​​the image side of the first lens.

[0074] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: 3.5<f1 / d1s+f1 / R2<4.0, where f1 is the effective focal length of the first lens, d1s is the inner diameter of the object side of the first spacing element, and R2 is the radius of curvature of the image side of the first lens. By controlling the effective focal length of the first lens, the size of the lens imaging can be controlled. By controlling the inner diameter of the object side of the first spacing element and the radius of curvature of the image side of the first lens, the imaging quality can be improved while reducing the generation of stray light, improving the optical path length, and enhancing the optical performance.

[0075] The third aspect of the present application provides such an optical photographic lens, which may include a lens barrel, a lens group and at least one spacer element, wherein the lens group and the one or more spacer elements are all contained in the lens barrel. The lens group may include six lenses with optical focal lengths, which are respectively a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the sixth lens may have a spacing distance between them. The optical photographic lens also includes at least one spacer element, for example, it may include a second spacer element located between the second lens and the third lens, the second spacer element may contact the non-optical area of ​​the image side of the second lens, and illustratively, it may abut against the non-optical area of ​​the image side of the second lens.

[0076] In an exemplary embodiment, the optical photography lens according to the present application may satisfy the following conditional formula: -108.0<R5 / (D2s+D2m)<-9.5, wherein D2s is the outer diameter of the object side surface of the second spacer element, D2m is the outer diameter of the image side surface of the second spacer element, and R5 is the radius of curvature of the object side surface of the third lens. By controlling the radius of curvature of the object side surface of the third lens, the length of the light passing through the third lens can be improved, and the optical performance can be improved. By controlling the sum of the outer diameter of the object side surface of the second spacer element and the outer diameter of the image side surface of the second spacer element, the overall size of the second lens and the third lens can be controlled, and the overall structure can be improved.

[0077] It should be understood that the present application does not specifically limit the number of spacer elements, and any number of spacer elements may be included between any two lenses, and the entire optical photographic lens may also include any number of spacer elements. The spacer element helps the optical photographic lens intercept excess refractive and reflective light paths and reduce stray light and ghosting. Adding auxiliary support between the spacer element and the lens barrel is helpful to improve the problems of poor assembly stability and low performance yield caused by large step differences between lenses.

[0078] In some embodiments, the optical photography lens according to the present application may further include a filter and / or protective glass disposed between the sixth lens and the imaging plane, for filtering light with different wavelengths, correcting color deviation, and protecting the photosensitive element located on the imaging plane.

[0079] In some embodiments, the optical photography lens according to the present application may further include an aperture disposed between the object side and the first lens. The provision of the aperture is conducive to effectively converging the light entering the optical lens and is conducive to reducing the aperture of the lens.

[0080] According to the optical photographic lens of the above embodiment of the present application, its lens group can use multiple lenses, such as the six lenses described above. By reasonably allocating the focal length, surface shape, center thickness of each lens, and axial spacing between each lens, etc., the incident light can be effectively converged, the total optical length can be reduced, and the processability can be improved, making the optical photographic lens more conducive to production and processing.

[0081] In an embodiment of the present application, at least one of the mirror surfaces of each lens in the first lens to the sixth lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, the object side surface and the image side surface of each lens in the first lens to the sixth lens are aspherical mirror surfaces.

[0082] Embodiments 1 to 8 of the optical photographic lens applicable to the above exemplary embodiment will be further described below with reference to the accompanying drawings.

[0083] Example 1

[0084] The following reference Figure 3A An optical photographic lens according to Embodiment 1 of the present application is described.

[0085] like Figure 3A As shown, the optical photographic lens comprises a lens barrel P0 and a lens group and at least one spacer element accommodated in the lens barrel P0.

[0086] The lens group includes, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6.

[0087] The at least one spacer element includes: a first spacer element, a second spacer element, a third spacer element, a fourth spacer element and a fifth spacer element. The spacer element can block stray light from entering the next lens during the imaging process, and at the same time make the lens and the lens barrel P0 better supported, thereby enhancing the structural stability of the optical photography lens.

[0088] Exemplarily, each spacer element may include at least one spacer, for example, the first spacer element includes spacer P1, the second spacer element includes spacer P2, etc.; or each spacer element may also include spacers and spacers, for example, the fifth spacer element may include spacer P5 and spacer P5b.

[0089] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The optical photography lens also includes a filter (not shown) arranged between the sixth lens E6 and the imaging surface S15. The filter has an object side surface S13 and an image side surface S14. Light from the object passes through each surface S1 to S14 in sequence and is finally imaged on the imaging surface S15.

[0090] Table 1 shows the basic parameters of the optical photography lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0091]

[0092]

[0093] Table 1

[0094] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0095]

[0096] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0097] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.5786E-02 -1.0009E-02 -2.5642E-03 -5.1606E-04 -1.2534E-04 3.3418E-06 8.6388E-06 S2 -5.1877E-02 1.0898E-03 3.7828E-04 -8.4649E-04 -4.0727E-04 -5.7568E-05 1.7325E-05 S3 -1.8845E-02 1.8866E-02 8.0634E-04 -1.3696E-03 -3.8867E-04 6.1753E-05 2.1049E-05 S4 -8.7937E-02 1.4162E-02 -3.1369E-03 6.8482E-04 -4.8671E-04 5.3594E-04 -1.1498E-04 S5 -6.3341E-02 9.5475E-03 -8.4747E-04 1.5038E-03 -6.1751E-04 4.5302E-04 -9.6647E-05 S6 7.6321E-03 4.8491E-03 2.2059E-04 8.1200E-04 -2.1188E-04 8.5235E-05 -1.1454E-05 S7 -2.1927E-01 -7.6630E-03 -7.5633E-03 2.6674E-04 -2.3447E-04 3.3283E-05 -1.3151E-04 S8 -5.6414E-01 5.3174E-03 -2.3230E-03 1.0068E-02 3.5612E-03 1.4711E-03 -1.2110E-04 S9 -9.4729E-01 4.4998E-03 1.5864E-02 9.0097E-03 1.8102E-03 2.6057E-03 1.0582E-03 S10 -4.1909E-01 1.3145E-01 -4.2209E-02 -1.6461E-02 9.8695E-03 2.7778E-03 -3.9758E-03 S11 -6.6648E+00 2.4713E+00 -1.0525E+00 4.1552E-01 -1.3290E-01 2.9862E-02 -8.0056E-03 S12 -1.0613E+01 2.3179E+00 -6.3413E-01 3.7499E-01 -1.6798E-01 4.5073E-02 -4.2814E-02

[0098] Table 2-1

[0099]

[0100]

[0101] Table 2-2

[0102] Figure 4A The axial chromatic aberration curve of the optical photography lens of Example 1 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 4B The astigmatism curve of the optical photographic lens of Example 1 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical photographic lens of Example 1 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Figure 4D The chromatic aberration curve of the optical photographic lens of Example 1 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. 4A to 4D It can be seen that the optical photography lens provided in Example 1 can achieve good imaging quality.

[0103] Example 2

[0104] The following reference Figure 3B The optical photographic lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted.

[0105] like Figure 3B As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0106] The parameters such as the curvature radius, center thickness, etc. of the first to sixth lenses of the optical photographic lens of this embodiment and embodiment 1, as well as the spacing distances between lenses and high-order image coefficients are the same, as shown in Table 1, Table 2-1 and Table 2-2. In addition, the number of spacing elements included in the optical photographic lens of this embodiment and embodiment 1 is also the same, and the only difference is that the actual parameters of the lens barrel and each spacing element are different, for example, at least one of the parameters such as the lens barrel size, the thickness of the spacing element, the inner diameter of the spacing element, the outer diameter of the spacing element, and the spacing distance between the spacing elements is different. In other words, the main structure for imaging is the same, while the auxiliary structure for imaging is different. Therefore, the imaging quality of the optical photographic lens of embodiment 2 of the present application is as follows: 4A to 4D shown.

[0107] Example 3

[0108] The following reference Figure 5A An optical photographic lens according to Example 3 of the present application is described.

[0109] like Figure 5A As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0110] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The optical photography lens also includes a filter (not shown) arranged between the sixth lens E6 and the imaging surface S15.

[0111] Table 3 shows the basic parameters of the optical photography lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0112]

[0113] Table 3

[0114] In Example 3, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by the formula (1) given in the above Example 1. The following Tables 4-1 and 4-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0115]

[0116]

[0117] Table 4-1

[0118] Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.4404E-06 -2.6927E-06 -6.0533E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.4481E-05 1.4391E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 3.4831E-05 9.8827E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 7.3642E-05 -1.2566E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 5.1213E-05 -8.8460E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 3.3635E-06 3.4072E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -3.4546E-05 -2.7642E-05 -2.1728E-05 -9.3591E-06 -4.3138E-06 -1.3174E-06 7.4131E-08 S8 -5.9172E-04 -4.2953E-04 -2.2257E-04 -5.6011E-05 9.0123E-06 2.4673E-05 1.3775E-05 S9 2.3915E-04 -5.6006E-04 -5.6077E-04 -3.0098E-04 -3.6956E-05 5.8089E-05 1.9720E-05 S10 9.7674E-05 9.0782E-04 -8.0663E-05 -3.0844E-04 1.0188E-04 -1.6768E-05 -3.1634E-05 S11 7.5581E-03 -6.2342E-03 2.6681E-03 -3.6597E-04 -3.5260E-04 2.0775E-04 -4.9795E-05 S12 2.3061E-02 -4.3077E-03 6.7002E-03 -3.8363E-03 -3.1653E-04 -1.3536E-03 9.1550E-04

[0119] Table 4-2

[0120] Fig. 6A The axial chromatic aberration curve of the optical photography lens of Example 3 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 6B The astigmatism curve of the optical photographic lens of Example 3 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical photographic lens of Example 3 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Fig.6D The chromatic aberration curve of the optical photography lens of Example 3 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 6A to FIG. 6D It can be seen that the optical photography lens provided in Example 3 can achieve good imaging quality.

[0121] Example 4

[0122] The following reference Figure 5B An optical photographic lens according to Example 4 of the present application is described.

[0123] like Figure 5BAs shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0124] The parameters such as the radius of curvature, center thickness, and spacing distances between lenses, and high-order image coefficients of the optical photographic lens of this embodiment and embodiment 3 are the same, as shown in Table 3, Table 4-1, and Table 4-2. In addition, the number of spacing elements included in the optical photographic lens of this embodiment and embodiment 3 is also the same, and the only difference is that the actual parameters of the lens barrel and each spacing element are different, for example, at least one of the parameters such as the lens barrel size, the thickness of the spacing element, the inner diameter of the spacing element, the outer diameter of the spacing element, and the spacing distance between the spacing elements is different. In other words, the main structure for imaging is the same, while the auxiliary structure for imaging is different. Therefore, the imaging quality of the optical photographic lens of embodiment 4 of the present application is as follows: FIG. 6A to FIG. 6D shown.

[0125] Example 5

[0126] The following reference Fig. 7A An optical photographic lens according to Example 5 of the present application is described.

[0127] like Fig. 7A As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0128] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0129] Table 5 shows the basic parameters of the optical photography lens of Example 5, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0130]

[0131] Table 5

[0132] In Example 5, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by the formula (1) given in the above Example 1. The following Tables 6-1 and 6-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0133]

[0134]

[0135] Table 6-1

[0136] Face number A18 A20 A22 A24 A26 A28 A30 S1 -9.8087E-06 -2.1151E-06 1.1773E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -2.9980E-05 -4.2346E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -5.1847E-05 -1.7442E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -3.1896E-05 -4.3997E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.2084E-07 -2.9624E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 8.8825E-06 -1.1711E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 -3.7947E-06 -3.9581E-06 -1.7700E-05 -4.0875E-06 -8.2225E-06 -6.7099E-07 -1.9498E-06 S8 -2.6163E-04 -4.2117E-04 -3.0857E-04 -1.9062E-04 -8.4279E-05 -3.2649E-05 -7.3471E-06 S9 -1.8492E-04 -1.0831E-03 -8.8528E-04 -3.8910E-04 -4.2155E-05 9.3426E-05 3.7412E-05 S10 -4.7249E-04 1.2146E-03 -7.4042E-05 -4.8269E-04 1.3842E-05 6.8864E-05 -4.9167E-05 S11 7.5881E-03 -6.3248E-03 2.9825E-03 -8.1889E-04 1.6885E-04 -1.0647E-04 7.9571E-05 S12 2.4457E-02 -5.7281E-03 7.1688E-03 -4.1385E-03 1.2218E-05 -1.3658E-03 1.1414E-03

[0137] Table 6-2

[0138] Fig. 8A The axial chromatic aberration curve of the optical photography lens of Example 5 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Figure 8B The astigmatism curve of the optical photographic lens of Example 5 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical photographic lens of Example 5 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Fig.8D The chromatic aberration curve of the optical photographic lens of Example 5 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 8A to FIG. 8D It can be seen that the optical photography lens provided in Example 5 can achieve good imaging quality.

[0139] Example 6

[0140] The following reference Figure 7B An optical photographic lens according to Example 6 of the present application is described.

[0141] like Figure 7B As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0142] The optical photographic lenses of this embodiment and embodiment 5 have the same parameters as regards the radius of curvature, center thickness, and other parameters of the first to sixth lenses, as well as the spacing distances between lenses and high-order image coefficients, as shown in Table 5, Table 6-1, and Table 6-2. In addition, the number of spacing elements included in the optical photographic lenses of this embodiment and embodiment 5 is also the same, and the only difference is that the actual parameters of the lens barrel and each spacing element are different, for example, at least one of the parameters such as the lens barrel size, the thickness of the spacing element, the inner diameter of the spacing element, the outer diameter of the spacing element, and the spacing distance between the spacing elements is different. In other words, the main structure for imaging is the same, while the auxiliary structure for imaging is different. Therefore, the imaging quality of the optical photographic lens of embodiment 6 of the present application is as follows: FIG. 8A to FIG. 8D shown.

[0143] Example 7

[0144] The following reference Fig.9A An optical photographic lens according to Example 7 of the present application is described.

[0145] like Fig.9A As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0146] The first lens E1 has positive focal power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave.

[0147] Table 7 shows the basic parameters of the optical photography lens of Example 7, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0148]

[0149] Table 7

[0150] In Example 7, the object side surface and the image side surface of any lens from the first lens E1 to the sixth lens E6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by the formula (1) given in the above Example 1. The following Tables 8-1 and 8-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0151] Face number A4 A6 A8 A10 A12 A14 A16 S1 -3.7902E-02 -1.0833E-02 -2.3941E-03 -3.7213E-04 -7.8526E-05 -4.2626E-05 -3.1787E-05 S2 -5.5317E-02 1.7805E-03 1.0547E-03 -6.4616E-04 -5.8609E-04 -2.7630E-04 -1.0494E-04 S3 -1.7955E-02 1.9723E-02 1.8160E-03 -1.0043E-03 -5.5121E-04 -2.1022E-04 -1.1515E-04 S4 -9.8651E-02 1.6913E-02 -2.3303E-03 1.2030E-03 -6.5603E-04 2.8221E-04 -3.8232E-04 S5 -7.0279E-02 1.6456E-02 1.6963E-03 2.3057E-03 -7.3929E-04 4.0263E-04 -2.9965E-04 S6 1.7277E-02 1.0088E-02 2.0568E-03 1.4308E-03 -1.5981E-04 1.8450E-04 -2.0520E-05 S7 -2.2430E-01 -8.5560E-03 -7.8167E-03 2.7701E-04 -1.3693E-05 1.8861E-04 6.0013E-05 S8 -5.7191E-01 3.7046E-03 -4.4654E-03 1.0819E-02 4.3289E-03 2.2950E-03 3.0301E-04 S9 -9.2863E-01 -1.6587E-03 7.1685E-03 8.6376E-03 2.5923E-03 3.8677E-03 1.8267E-03 S10 -4.1277E-01 1.2762E-01 -4.0184E-02 -1.6216E-02 9.2262E-03 3.8936E-03 -4.3492E-03 S11 -6.6334E+00 2.4772E+00 -1.0508E+00 4.1509E-01 -1.3218E-01 3.0087E-02 -8.3921E-03 S12 -1.0623E+01 2.3664E+00 -6.3468E-01 3.7596E-01 -1.7070E-01 4.7172E-02 -4.4847E-02

[0152] Table 8-1

[0153] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.4918E-05 -5.3075E-06 -2.2695E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 -3.5581E-05 -5.9767E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 -5.3500E-05 -1.6886E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 -2.7558E-05 -4.4374E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 4.6373E-06 -2.8274E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 8.9149E-06 -1.2682E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.3427E-05 7.9636E-07 -1.1717E-05 -2.8113E-06 -5.8960E-06 -2.5497E-07 -1.0894E-06 S8 -2.4592E-04 -4.3157E-04 -3.2196E-04 -2.0154E-04 -8.9581E-05 -3.4640E-05 -7.2446E-06 S9 -2.2545E-04 -1.0981E-03 -8.9495E-04 -3.9870E-04 -5.7076E-05 8.5059E-05 3.0805E-05 S10 -4.0942E-04 1.2084E-03 -1.2697E-04 -4.9682E-04 2.4438E-05 6.2051E-05 -5.6991E-05 S11 7.5044E-03 -6.5591E-03 3.2460E-03 -9.4828E-04 2.0058E-04 -9.7116E-05 8.4691E-05 S12 2.6023E-02 -5.7961E-03 6.9593E-03 -4.6706E-03 -3.2953E-05 -1.2486E-03 1.2822E-03

[0154] Table 8-2

[0155] Fig. 10A The axial chromatic aberration curve of the optical photography lens of Example 7 is shown, which indicates the deviation of light of different wavelengths from the focal point behind the lens. Fig. 10B The astigmatism curve of the optical photographic lens of Example 7 is shown, which indicates the meridional field curvature and the sagittal field curvature. Fig. 10C The distortion curve of the optical photographic lens of Example 7 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. Fig. 10D The chromatic aberration curve of the optical photography lens of Example 7 is shown, which indicates the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 10A to FIG. 10D It can be seen that the optical photography lens provided in Example 7 can achieve good imaging quality.

[0156] Example 8

[0157] The following reference Fig. 9B An optical photographic lens according to Example 8 of the present application is described.

[0158] like Fig. 9B As shown, the optical photography lens comprises a lens barrel P0, a lens group and at least one spacer element contained in the lens barrel P0. The lens group comprises, from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens E6. The spacer element 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 and P5b.

[0159] The parameters such as the radius of curvature, center thickness, etc. of the first to sixth lenses of the optical photographic lenses of this embodiment and embodiment 7, as well as the spacing distances between lenses and high-order image coefficients are the same, as shown in Table 7, Table 8-1 and Table 8-2. In addition, the number of spacing elements included in the optical photographic lenses of this embodiment and embodiment 7 is also the same, and the only difference is that the actual parameters of the lens barrel and each spacing element are different, for example, at least one of the parameters such as the lens barrel size, the thickness of the spacing element, the inner diameter of the spacing element, the outer diameter of the spacing element, and the spacing distance between the spacing elements is different. In other words, the main structure for imaging is the same, while the auxiliary structure for imaging is different. Therefore, the imaging quality of the optical photographic lens of embodiment 8 of the present application is as follows: FIG. 10A to FIG. 10D shown.

[0160] Table 9 below shows some parameters of the optical photography lenses of Examples 1 to 8, such as the effective focal length of each lens, the on-axis distance SAG61 from 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, and the maximum effective radius of the object side surface or image side surface of some lenses, etc. The units of the focal length value, distance or effective radius value are all millimeters (mm).

[0161] Parameter value / example 1 2 3 4 5 6 7 8 f1 5.64 5.64 5.60 5.60 5.73 5.73 5.70 5.70 f2 14.42 14.42 14.01 14.01 14.09 14.09 13.43 13.43 f3 -12.77 -12.77 -11.92 -11.92 -11.86 -11.86 -11.14 -11.14 f4 -16.76 -16.76 -17.43 -17.43 -17.61 -17.61 -17.87 -17.87 f5 5.64 5.64 5.58 5.58 5.42 5.42 5.41 5.41 f6 -5.02 -5.02 -5.00 -5.00 -5.00 -5.00 -5.00 -5.00 f56 20.48 20.48 20.36 20.36 17.19 17.19 17.12 17.12 SAG61 -1.20 -1.20 -1.17 -1.17 -1.16 -1.16 -1.15 -1.15 DT32 1.07 1.07 1.10 1.10 1.15 1.15 1.15 1.15 DT41 1.20 1.20 1.19 1.19 1.21 1.21 1.21 1.21 DT42 1.47 1.47 1.47 1.47 1.48 1.48 1.48 1.48 DT51 1.82 1.82 1.81 1.81 1.84 1.84 1.84 1.84 DT61 3.78 3.78 3.77 3.77 3.76 3.76 3.78 3.78

[0162] Table 9

[0163] Table 10 below shows some basic parameters of the lens barrel and the spacer element of the optical photographic lens of Examples 1 to 8, such as d1s, d2s, D2s, D2m, D3s, D3m, d4s, d4m, D4s, D4m, d5s, d5m, D5m, d0m, EP01, EP34, EP45, CP1, CP5, L, etc. The units of the basic parameters listed in Table 10 are all millimeters (mm).

[0164]

[0165]

[0166] Table 10 In summary, in Examples 1 to 8, the optical photography lenses respectively meet the conditions in Table 11 below.

[0167]

[0168]

[0169] Table 11

[0170] Table 12 below shows the deformation analysis of the third lens and the fourth lens of the optical photographic lens after the assembly compression simulation. Combined with Table 12, through the experimental comparison of the optical photographic lens, it can be found that if the numerical range of the conditional formula -5.5<R4 / D2m<-3.9 and -35.0<f3*N3 / (EP34+T34)<-26.5 is exceeded, the optical performance of the optical photographic lens is unqualified; and by adjusting the values ​​of R4 / D2m and f3*N3 / (EP34+T34), so that sample 1 is within the numerical range of -5.5<R4 / D2m<-3.9 and -35.0<f3*N3 / (EP34+T34)<-26.5, compared with samples 2 and 3 outside the numerical range of the conditional formula, the center point displacement and edge point displacement of the third lens and the fourth lens are smaller, and the assembly stability is higher. Therefore, by adjusting the values ​​of R4 / D2m and f3*N3 / (EP34+T34) to satisfy the conditional ranges of -5.5<R4 / D2m<-3.9 and -35.0<f3*N3 / (EP34+T34)<-26.5, the assembly stability of the optical photographic lens can be improved and the structure can be optimized.

[0171]

[0172] Table 12

[0173] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. An optical photographic lens, characterized in that: The invention comprises a lens barrel having a receiving space, and a lens group and at least one spacer element received in the lens barrel, wherein: The lens group comprises: a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with positive focal power, and a sixth lens with negative focal power, which are arranged in sequence from the object side to the image side along the optical axis; The at least one spacing element includes: a second spacing element located between the second lens and the third lens and in direct contact with the image side of the second lens, a third spacing element located between the third lens and the fourth lens and in direct contact with the image side of the third lens, and a fourth spacing element located between the fourth lens and the fifth lens and in direct contact with the image side of the fourth lens, The curvature radius R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacer element, the effective focal length f3 of the third lens, the refractive index N3 of the third lens, the interval EP34 between the third spacer element and the fourth spacer element, and the air interval T34 between the third lens and the fourth lens on the optical axis satisfy: -5.5<R4 / D2m<-3.9; -35.0<f3*N3 / (EP34+T34)<-26.

5.

2. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, A curvature radius R10 of the image-side surface of the fifth lens, a refractive index N5 of the fifth lens, and an inner diameter d5s of the object-side surface of the fifth spacer element satisfy: -2.5<R10*N5 / d5s<-2.

0.

3. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, The effective focal length f5 of the fifth lens, the interval EP45 between the fourth spacing element and the fifth spacing element, and the air interval T56 between the fifth lens and the sixth lens on the optical axis satisfy: 3.0<f5 / (EP45+T56)<3.

5.

4. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, The maximum effective radius DT61 of the object side surface of the sixth lens, the outer diameter D5m of the image side surface of the fifth spacing element, and the inner diameter d5m of the image side surface of the fifth spacing element satisfy: 1.5<DT61 / (D5m-d5m)<2.

5.

5. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, The effective focal length f1 of the first lens, the inner diameter d1s of the object-side surface of the first spacer element, and the curvature radius R2 of the image-side surface of the first lens satisfy: 3.5<f1 / d1s+f1 / R2<4.

0.

6. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, The interval EP01 between the front end surface of the lens barrel and the first spacing element, the maximum thickness CP1 of the first spacing element, and the center thickness CT1 of the first lens on the optical axis satisfy: 7.0<(EP01-CT1) / CP1<10.

5.

7. The optical photographic lens according to claim 1, wherein: An outer diameter D3m of the image-side surface of the third spacer element and a maximum effective radius DT41 of the object-side surface of the fourth lens satisfy the following: 2.5<D3m / DT41<3.

5.

8. The optical photographic lens according to claim 1, wherein: An outer diameter D3s of the object-side surface of the third spacer element and a maximum effective radius DT32 of the image-side surface of the third lens satisfy: 3.0<D3s / DT32<4.

0.

9. The optical photographic lens according to claim 1, wherein: The outer diameter D4m of the image side surface of the fourth spacer element, the inner diameter d4m of the image side surface of the fourth spacer element, the maximum effective radius DT51 of the object side surface of the fifth lens, and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy: 3.5<(D4m-d4m) / (DT51-DT42)<5.

6.

10. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, The effective focal length f6 of the sixth lens, the curvature radius R12 of the image side surface of the sixth lens, the maximum thickness CP5 of the fifth spacer element, and the inner diameter d0m of the rear end surface of the lens barrel closest to the image side satisfy: 24.0<|f6*R12| / (CP5*d0m)<33.

0.

11. The optical photographic lens according to any one of claims 1 to 10, wherein: A curvature radius R3 of the object-side surface of the second lens, a refractive index N2 of the second lens, and an inner diameter d2s of the object-side surface of the second spacer element satisfy: 8.5<R3*N2 / d2s<12.

0.

12. The optical photographic lens according to any one of claims 1 to 10, wherein: The curvature radius R5 of the object side surface of the third lens, the outer diameter D2s of the object side surface of the second spacer element, and the outer diameter D2m of the image side surface of the second spacer element satisfy: -108.0<R5 / (D2s+D2m)<-9.

5.

13. The optical photographic lens according to any one of claims 1 to 10, wherein: The curvature radius R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacing element, the curvature radius R7 of the object side surface of the fourth lens, and the outer diameter D3m of the image side surface of the third spacing element satisfy: 7.5<R6 / D3s+R7 / D3m≤15.

0.

14. The optical photographic lens according to any one of claims 1 to 10, wherein: A curvature radius R8 of the image-side surface of the fourth lens and an inner diameter d4s of the object-side surface of the fourth spacer element satisfy: 2.0<R8 / d4s<3.

0.

15. The optical photographic lens according to claim 1, wherein: The at least one spacer element further comprises a fifth spacer element located between the fifth lens and the sixth lens and in direct contact with the image side of the fifth lens, An axial distance SAG61 from 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, and a maximum thickness CP5 of the fifth spacer element satisfy: 47.5<|SAG61 / CP5|<67.

0.

16. The optical photographic lens according to any one of claims 1 to 10, wherein: The combined focal length f56 of the fifth lens and the sixth lens and the maximum height L of the lens barrel along the optical axis direction satisfy: 3.5<f56 / L<4.

5.

17. The optical photography lens according to any one of claims 1 to 10, wherein: The effective focal length f4 of the fourth lens and the outer diameter D4s of the object side surface of the fourth spacing element satisfy: -4.0<f4 / D4s<-3.

0.

18. The optical photography lens according to any one of claims 1 to 10, wherein: The at least one spacer element further comprises a first spacer element located between the first lens and the second lens and in direct contact with the image side of the first lens, The air gap T12 between the first lens and the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, the maximum thickness CP1 of the first spacing element, and the maximum thickness CP3 of the third spacing element satisfy: 8.0<T23 / CP3+T12 / CP1<12.5.

Images