CN220171325U

CN220171325U - Photographic lens

Info

Publication number: CN220171325U
Application number: CN202320981278.6U
Authority: CN
Inventors: 齐禹; 翁宇翔; 戴付建; 赵烈烽
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-12-12
Anticipated expiration: 2033-04-26

Abstract

The application discloses a photographic lens. The photographing lens includes a lens group, at least one positioning member, and a barrel for accommodating the lens group and the at least one positioning member. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens with focal power from an object side to an image side along an optical axis, wherein the image side surface of the fifth lens is a concave surface. At least one positioning member includes a fourth positioning member located on an image side of the fourth lens and in contact with an image side portion of the fourth lens. The photographic lens satisfies: (d4m+d4m)/(d4m—d4m) ×|r9/r8| > 33, wherein D4m is the inner diameter of the image side of the fourth spacer, D4m is the outer diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

Description

Photographic lens

Technical Field

The application relates to the field of optical elements, in particular to a photographic lens.

Background

In recent years, smart products such as smart phones and related technologies thereof have been rapidly iterated and developed. Meanwhile, a photographic lens mounted on a smart product such as a smart phone has received a great deal of attention from consumers as an important component in the smart product. Currently, most smartphones are equipped with a tele lens for taking a far scene.

However, in a tele lens, there are often many phenomena such as stray light. Under the passing condition, more stray light can seriously reduce the imaging quality of the photographic lens. Therefore, how to improve the imaging quality of the tele lens is important.

Disclosure of Invention

An aspect of the present utility model provides a photographing lens including, in order from an object side to an image side along an optical axis, a lens group, at least one positioning member, and a barrel for accommodating the lens group and the at least one positioning member. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens with focal power from an object side to an image side along an optical axis, wherein the image side surface of the fifth lens is a concave surface. The at least one positioning member includes a fourth positioning member located on an image side of the fourth lens and in contact with an image side portion of the fourth lens. The photographic lens can satisfy: (d4m+d4m)/(d4m—d4m) ×|r9/r8| > 33, wherein D4m is the inner diameter of the image side of the fourth spacer, D4m is the outer diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

In one embodiment, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface.

In one embodiment, the at least one positioning member further comprises: a first positioning member located on an image side of the first lens and in contact with an image side portion of the first lens; a second positioning member located on the image side of the second lens and in contact with the image side portion of the second lens; and a third positioning member located on the image side of the third lens and in contact with the image side portion of the third lens. The photographic lens can satisfy: d1s > D2s > D3s, wherein D1s is the outer diameter of the object side of the first positioning member, D2s is the outer diameter of the object side of the second positioning member, and D3s is the outer diameter of the object side of the third positioning member.

In one embodiment, the image side of the fifth lens is supported against the image side end of the barrel.

In one embodiment, the at least one positioning member further comprises a fifth positioning member located on the image side of the fifth lens and in contact with the image side portion of the fifth lens. The photographic lens can satisfy: 0 < (CP5+CP4)/(Sigma CT < 0.3), wherein Sigma CT is the sum of the thicknesses of the centers of the first lens to the fifth lens on the optical axis, CP5 is the maximum thickness of the fifth positioning member, and CP4 is the maximum thickness of the fourth positioning member.

In one embodiment, the photographic lens may satisfy: 3.7 < 1/tan (Semi-FOV). Times.d0s/EPD < 4.2, wherein d0s is the inner diameter of the object side end of the lens barrel, semi-FOV is half of the maximum field angle of the photographing lens, EPD is the entrance pupil diameter of the photographing lens.

In one embodiment, the photographic lens may satisfy: 45mm of ² ＜π×(D3s^2-d3s^2)＜69mm ² Wherein D3s is the outer diameter of the object side surface of the third positioning member, and D3s is the inner diameter of the object side surface of the third positioning member.

In one embodiment, the photographic lens may satisfy: 0.3 < D5s/D5s× (f 5-f 4)/(f5+f4) < 4, wherein D5s is the outer diameter of the object side of the fifth positioning member, D5s is the inner diameter of the object side of the fifth positioning member, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

In one embodiment, the photographic lens may satisfy: 0.3 < CP4/T45 < 12, wherein T45 is the air separation of the fourth lens and the fifth lens on the optical axis, and CP4 is the maximum thickness of the fourth positioning member.

In one embodiment, the photographic lens may satisfy: 8 < (f×f)/(Σat×l) < 14, where f is the total effective focal length of the photographing lens, L is the maximum length of the lens barrel, Σat is the sum of air intervals on the optical axis of any adjacent two lenses of the first lens to the fifth lens.

In one embodiment, the photographic lens may satisfy: -33 < R6/R7× (EP 34/CP 3) < -18, wherein R6 is the radius of curvature of the image side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, EP34 is the distance between the image side of the third positioning member and the object side of the fourth positioning member in the direction along the optical axis, and CP3 is the maximum thickness of the third positioning member.

In one embodiment, the inner diameter of the object side surface of the third positioning member is smallest among the inner diameters of the object side surfaces and the image side surfaces of the first positioning member, the second positioning member, the third positioning member, the fourth positioning member, and the fifth positioning member; the photographic lens can satisfy: 1.4 < d0s/d3s < 1.7, wherein d0s is the inner diameter of the object side end of the lens barrel, and d3s is the inner diameter of the object side surface of the third positioning member.

Another aspect of the present application provides a photographing lens including, in order from an object side to an image side along an optical axis, a lens group, at least one positioning member, and a barrel for accommodating the lens group and the at least one positioning member. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens with focal power from an object side to an image side along an optical axis, wherein the image side surface of the fifth lens is a concave surface. The at least one positioning member includes a third positioning member located on an image side of the third lens and in contact with an image side portion of the third lens. The photographic lens can satisfy: 45mm of ² ＜π×(D3s^2-d3s^2)＜69mm ² Wherein D3s is the outer diameter of the object side surface of the third positioning member, and D3s is the inner diameter of the object side surface of the third positioning member.

In one embodiment, the at least one positioning member further comprises: a first positioning member located on an image side of the first lens and in contact with an image side portion of the first lens; and a second positioning member located on the image side of the second lens and in contact with the image side portion of the second lens. The photographic lens can satisfy: d1s > D2s > D3s, wherein D1s is the outer diameter of the object side of the first positioning member, D2s is the outer diameter of the object side of the second positioning member, and D3s is the outer diameter of the object side of the third positioning member.

In one embodiment, the at least one positioning member further comprises: a fourth positioning member located on the image side of the fourth lens and in contact with the image side portion of the fourth lens; and a fifth positioning member located on the image side of the fifth lens and in contact with the image side portion of the fifth lens. The photographic lens can satisfy: 0 < (CP5+CP4)/(Sigma CT < 0.3), wherein Sigma CT is the sum of the thicknesses of the centers of the first lens to the fifth lens on the optical axis, CP5 is the maximum thickness of the fifth positioning member, and CP4 is the maximum thickness of the fourth positioning member.

In an exemplary embodiment of the present application, the five lenses, the fifth lens image side surface, at least one positioning member and the lens barrel are reasonably arranged, and the combination of (d4m+d4m)/(d4m—d4m) ×|r9/r8| > 33 is beneficial to the characteristics of long focus, less parasitic light and the like of the photographic lens. According to the application, the inner diameter and the outer diameter of the fourth locating piece are reasonably arranged, so that the stray light risk of the five-piece type long-focus lens between the fourth lens and the fifth lens can be effectively avoided, and the interference of stray light on the quality of an imaging picture is reduced.

In another exemplary embodiment of the present application, five lenses, a fifth lens image side surface type, at least one positioning member and a lens barrel are reasonably arranged and matched with 45mm ² ＜π×(D3s^2-d3s^2)＜69mm ² The photographic lens has the characteristics of long focus, less stray light and the like. For example, the application is beneficial to design a lens with a long focal length characteristic by reasonably matching the lens barrel, the lens number, the framework, the positioning piece and the like. On the basis, the outer diameter and the inner diameter of the third positioning piece are reasonably arranged, so that the processing feasibility and the bearing area of the third positioning piece are improved, and the stability of elements adjacent to the third positioning piece, such as the third lens and the fourth lens, can be further improved. In addition, through the internal diameter of reasonable setting third setting element, can also reduce unnecessary parasitic light in the camera lens on the basis that does not influence the camera lens performance, improve the camera lens imaging.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

fig. 1A to 1C are schematic structural views of a photographing lens in three embodiments of example 1, respectively;

fig. 2A to 2C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve of the photographic lens of embodiment 1, respectively;

fig. 3A to 3C are schematic structural views of a photographing lens according to three embodiments of example 2;

fig. 4A to 4C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve of the photographic lens of embodiment 2, respectively;

fig. 5A to 5C are schematic structural views of a photographing lens according to three embodiments of example 3;

fig. 6A to 6C show an on-axis chromatic aberration curve, an astigmatism curve, and a distortion curve of the photographic lens of embodiment 3, respectively; and

fig. 7 and 8 are schematic diagrams of partial parameters of a photographing lens according to an embodiment of the application.

Detailed Description

For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens, and a first positioning member may also be referred to as a second positioning member or a third positioning member, without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale. It should be understood that the thicknesses, sizes, and shapes of the positioning member and the lens barrel have also been slightly exaggerated in the drawings for convenience of description.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position 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 referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens. It should be understood that the surface of each positioning member closest to the subject is referred to as the object side of the positioning member, and the surface of each positioning member closest to the imaging surface is referred to as the image side of the positioning member. The surface of the lens barrel closest to the object is referred to as the object side end of the lens barrel, and the surface of the lens barrel closest to the imaging surface is referred to as the image side end of the lens barrel.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The following examples merely illustrate a few embodiments of the present application, which are described in greater detail and are not to be construed as limiting the scope of the application. It should be noted that, for those skilled in the art, several modifications and improvements may be made without departing from the concept of the present application, which are all within the scope of the present application, for example, the lens group (i.e., the first lens to the fifth lens) of each embodiment of the present application, the lens barrel structure, and the positioning member may be arbitrarily combined, and the lens group of one embodiment is not limited to be combined with the lens barrel structure, the positioning member, and the like of the embodiment. The application will be described in detail below with reference to the drawings in connection with embodiments.

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

The photographing lens according to an exemplary embodiment of the present application may include five lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses in the first lens to the fifth lens can have a spacing distance.

According to an exemplary embodiment of the present application, each of the first to fifth lenses may have an optical region for optical imaging and a non-optical region extending outward from an outer circumference of the optical region. In general, an optical region refers to a region of a lens for optical imaging, and a non-optical region is a structural region of the lens. In the assembly process of the photographing lens, a positioning member may be provided at a non-optical area of each lens by a process such as spot gluing and the like and each lens may be coupled into a lens barrel, respectively. In the imaging process of the photographic lens, the optical area of each lens can transmit light from an object to form an optical path, so that a final optical image is formed; the non-optical areas of the assembled lenses are accommodated in the lens barrel which cannot transmit light, so that the non-optical areas do not directly participate in the imaging process of the photographic lens. It should be noted that for ease of description, the application is described with the individual lenses being divided into two parts, an optical region and a non-optical region, but it should be understood that both the optical region and the non-optical region of the lens may be formed as a single piece during manufacture rather than as separate two parts.

The photographing lens according to an exemplary embodiment of the present application may include four or five positioning members, which are a first positioning member, a second positioning member, a third positioning member, and a fourth positioning member, respectively; or a first positioning member, a second positioning member, a third positioning member, a fourth positioning member, and a fifth positioning member. Specifically, the photographing lens may include a first positioning member located at an image side of the first lens and in contact with an image side portion of the first lens, which may abut against a non-optical region of the image side of the first lens; a second positioning member located on the image side of the second lens and in contact with the image side portion of the second lens, the second positioning member being capable of abutting against a non-optical region of the image side of the second lens; a third positioning member located on the image side of the third lens and in contact with the image side portion of the third lens, which can abut against a non-optical region of the image side of the third lens; a fourth positioning member located on the image side of the fourth lens element and contacting the image side portion of the fourth lens element, and being capable of being abutted against the non-optical region of the image side of the fourth lens element; and a fifth positioning member positioned at the image side of the fifth lens and in contact with the image side portion of the fifth lens, and capable of abutting against the image side of the fifth lens. Illustratively, the first positioning element may be in contact with a non-optical region of the image side of the first lens and may be in contact with a non-optical region of the object side of the second lens. For example, the object-side surface of the first positioning element may be in contact with the non-optical region of the image-side surface of the first lens element, and the image-side surface of the first positioning element may be in contact with the non-optical region of the object-side surface of the second lens element.

The photographing lens according to an exemplary embodiment of the present application may include a barrel accommodating a lens group and a plurality of positioning members. As illustrated in fig. 1A and 1B, the lens barrel may be an integrated lens barrel for accommodating the first to fifth lenses and the first to fourth positioners, for example. Illustratively, as shown in fig. 1C, the lens barrel may accommodate first to fifth lenses and first to fifth positioners.

According to the exemplary embodiment of the application, the positioning piece can comprise at least one spacing piece, and the number, the thickness, the inner diameter and the outer diameter of the spacing pieces are reasonably arranged, so that the assembly of the photographic lens is improved, stray light is shielded, and the imaging quality of the photographic lens is improved.

In an exemplary embodiment, the image side of the fifth lens is concave. The photographic lens according to the present application can satisfy: (d4m+d4m)/(d4m—d4m) ×|r9/r8| > 33, wherein D4m is the inner diameter of the image side of the fourth spacer, D4m is the outer diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens. In the application, the reasonable arrangement of the five lenses, the fifth lens image side surface type, the at least one positioning piece and the lens barrel and the matching of (D4m+d4m)/(D4 m-D4 m) x|R9/R8| > 33 are beneficial to the characteristics of long focus, less stray light and the like of the photographic lens. For example, the application is beneficial to design a lens with a long focal length characteristic by reasonably matching the lens barrel, the lens number, the framework, the positioning piece and the like. On the basis, the shape of the fourth lens and the shape of the fifth lens are controlled by reasonably setting the curvature radius of the image side surface of the fourth lens and the curvature radius of the object side surface of the fifth lens, so that the deflection angle of the whole light of the lens can be effectively controlled, the whole aberration and ghost images of the lens are reduced, and the photographic lens has higher imaging quality; through the external diameter and the internal diameter of the image side of reasonable setting fourth setting element, can effectively avoid the stray light risk, reduce the interference of stray light to the imaging picture quality.

In another exemplary embodiment, the image side of the fifth lens is concave. The photographic lens according to the present application can satisfy: 45mm of ² ＜π×(D3s^2-d3s^2)＜69mm ² Wherein D3s is the outer diameter of the object side surface of the third positioning member, and D3s is the outer diameter of the object side surface of the third positioning memberAn inner diameter of the object side surface. In the application, the five lenses, the fifth lens image side surface type, at least one positioning piece and the lens barrel are reasonably arranged and matched with 45mm ² ＜π×(D3s^2-d3s^2)＜69mm ² The photographic lens has the characteristics of long focus, less stray light and the like. For example, the application is beneficial to design a lens with a long focal length characteristic by reasonably matching the lens barrel, the lens number, the framework, the positioning piece and the like. On the basis, the outer diameter and the inner diameter of the third positioning piece are reasonably arranged, so that the processing feasibility and the bearing area of the third positioning piece are improved, and the stability of elements adjacent to the third positioning piece, such as the third lens and the fourth lens, can be further improved. In addition, through the internal diameter of reasonable setting third setting element, can also reduce unnecessary parasitic light in the camera lens on the basis that does not influence the camera lens performance, improve the camera lens imaging.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: 0 < (CP5+CP4)/(Sigma CT < 0.3), wherein Sigma CT is the sum of the thicknesses of the centers of the first lens to the fifth lens on the optical axis, CP5 is the maximum thickness of the fifth positioning member, and CP4 is the maximum thickness of the fourth positioning member. The lens axial dimension is reduced as much as possible on the basis that the lens performance and main parameters meet the design requirement and each lens meets the processing requirement by reasonably setting the space ratio of the sum of the thicknesses of the centers of all lenses so as to reduce the space ratio of the lens structure, save materials and greatly reduce the product cost, wherein (CP5+CP4)/ΣCTis less than 0.3.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: 3.7 < 1/tan (Semi-FOV). Times.d0s/EPD < 4.2, wherein d0s is the inner diameter of the object side end of the lens barrel, semi-FOV is half of the maximum field angle of the photographing lens, EPD is the entrance pupil diameter of the photographing lens. Satisfies 3.7 < 1/tan (Semi-FOV). Times.d0s/EPD < 4.2, the photographic lens has larger light-passing caliber by reasonably distributing the object side end size, the entrance pupil diameter and the field angle size of the lens barrel, thereby having sufficient light-passing quantity, being beneficial to improving the brightness of photographed pictures and enabling the lens to have better photographing effect under dark night environment.

In an exemplary embodiment, the image side of the fifth lens is supported against the image side end of the barrel. The photographic lens according to the present application can satisfy: d1s > D2s > D3s, wherein D1s is the outer diameter of the object side of the first positioning member, D2s is the outer diameter of the object side of the second positioning member, and D3s is the outer diameter of the object side of the third positioning member. Satisfies D1s > D2s > D3s, and the size of the positioning piece can be matched with the size of the lens barrel by reasonably setting the outer diameter of the positioning piece. In the process of assembling each positioning piece and the lens from the object side end of the lens barrel, the outer diameter of each assembled element can be matched with the inner diameter of the lens barrel, so that the stability in the assembling process is improved, and the yield and the production efficiency of lens products are improved.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: 0.3 < D5s/D5s× (f 5-f 4)/(f5+f4) < 4, wherein D5s is the outer diameter of the object side of the fifth positioning member, D5s is the inner diameter of the object side of the fifth positioning member, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens. Satisfying 0.3 < D5s/D5s× (f 5-f 4)/(f5+f4) < 4, the focal powers of the fourth lens and the fifth lens can be reasonably distributed by reasonably setting the effective focal lengths of the fourth lens and the fifth lens so as to reduce the lens phase difference, and the convergence of the image side light rays can be reasonably controlled so that the image side light rays can be better adapted to the light receiver on the imaging plane.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: 0.3 < CP4/T45 < 12, wherein T45 is the air separation of the fourth lens and the fifth lens on the optical axis, and CP4 is the maximum thickness of the fourth positioning member. Satisfies 0.3 < CP4/T45 < 12, not only can ensure that the fourth lens and the fifth lens do not interfere in the assembly process by reasonably setting the air interval of the fourth lens and the fifth lens on the optical axis, but also can reasonably control the size of the step difference between the fourth lens and the fifth lens by reasonably setting the ratio of the air interval of the fourth lens and the fifth lens on the optical axis to the edge distance (namely the maximum thickness of the fourth positioning piece) of the fourth lens and the fifth lens, thereby ensuring the processability of the fourth positioning piece and the stability in the assembly process.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: 8 < (f×f)/(Σat×l) < 14, where f is the total effective focal length of the photographing lens, L is the maximum length of the barrel, i.e., L is the distance between the object side end of the barrel and the image side end of the barrel in the direction along the optical axis, Σat is the sum of the air intervals on the optical axis of any adjacent two lenses of the first lens to the fifth lens. Satisfying 8 < (f×f)/(ΣAT×L) < 14, the optical power of each lens can be reasonably distributed by reasonably setting the relation among the length of the lens barrel, the sum of the air intervals of adjacent lenses and the total effective focal length of the lens, so that on the basis of smaller length of the lens barrel, all lenses can be accommodated, thereby being beneficial to realizing the miniaturization of the whole lens and improving the practicability of the lens.

In an exemplary embodiment, the photographing lens according to the present application may satisfy: -33 < R6/R7× (EP 34/CP 3) < -18, wherein R6 is the radius of curvature of the image side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, EP34 is the distance between the image side of the third positioning member and the object side of the fourth positioning member in the direction along the optical axis, and CP3 is the maximum thickness of the third positioning member. Satisfies R6/R7X (EP 34/CP 3) with the value of-33 being less than-18, and can improve the processing property of the third lens and the fourth lens by reasonably setting the curvature radius of the image side surface of the third lens and the object side surface of the fourth lens, reduce the optical sensitivity of the third lens and the fourth lens, reduce the yield loss problem caused by the fluctuation of assembly tolerance in the assembly process of the third lens and the fourth lens, and ensure the stability of the imaging quality of the photographic lens.

In an exemplary embodiment, the inner diameter of the object side surface of the third positioning member is the smallest among the inner diameters of the object side surfaces and the image side surfaces of the first positioning member, the second positioning member, the third positioning member, the fourth positioning member, and the fifth positioning member. The photographic lens according to the present application can satisfy: 1.4 < d0s/d3s < 1.7, wherein d0s is the inner diameter of the object side end of the lens barrel, and d3s is the inner diameter of the object side surface of the third positioning member. Satisfies 1.4 < d0s/d3s < 1.7, and the ratio of the inner diameter of the object side end of the lens barrel to the inner diameter of the object side surface of the third positioning piece can be reasonably set to control the level difference of assembly bearing among a plurality of elements, reduce element deformation caused by element bearing position deviation in the assembly process, improve the yield and imaging quality of the lens, and simultaneously reduce the spacing of the positioning elements in the vertical axis direction, thereby being beneficial to positioning the position of stray light, intercepting the stray light and improving the imaging effect.

In an exemplary embodiment, the photographing lens according to the present application further includes a diaphragm disposed between the object side and the first lens. Optionally, the photographic lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The application provides a photographic lens with the characteristics of long focus, miniaturization, less stray light, high stability, high yield, high imaging quality and the like. The photographing lens according to the above embodiment of the present application may employ a plurality of lenses, for example, the above five lenses. Through reasonable distribution of focal power, surface type, material, center thickness and on-axis spacing among the lenses, etc., incident light can be effectively converged, the optical total length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the photographic lens is more beneficial to production and processing. In the photographing lens of the embodiment of the application, the positioning piece is arranged between the adjacent lenses, and the inner diameter and the outer diameter of the positioning piece are designed according to the light path, so that stray light can be effectively shielded and eliminated, and the imaging quality of the lens is improved.

In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the fifth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies 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 radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are aspherical mirror surfaces.

However, it will be appreciated by those skilled in the art that the number of lenses making up the photographic lens can be varied to achieve the various results and advantages described in this specification without departing from the scope of the application as claimed. For example, although the description has been made by taking five lenses as an example in the embodiment, the photographic lens is not limited to include five lenses. The photographic lens may also include other numbers of lenses, if desired.

Specific examples of the photographic lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

A photographic lens according to embodiment 1 of the present application is described below with reference to fig. 1A to 2C. Fig. 1A to 1C show photographing lenses in three embodiments of example 1, respectively.

As shown in fig. 1A to 1C, the photographing lens sequentially includes, from an object side to an image side: stop STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter (not shown), and imaging plane (not shown).

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The filter has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.

Table 1 shows the basic parameter table of the photographic lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).

TABLE 1

In this example, half of the maximum field angle of the photographic lens has a Semi-FOV of 14.5 °, the entrance pupil diameter EPD of the photographic lens is 4.69mm, and the total effective focal length f of the photographic lens is 14.88mm.

As shown in fig. 1A and 1B, the photographing lens may include four positioning members, namely, a first positioning member P1, a second positioning member P2, a third positioning member P3, and a fourth positioning member P4. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fourth positioners P1 to P4.

As shown in fig. 1C, the photographing lens may include five positioning elements, namely a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fifth positioners P1 to P5.

Table 2 shows basic parameter tables of each positioning member in three embodiments in the photographic lens of example 1, in which each structural parameter is in millimeters (mm).

Structural parameters	Embodiment 1	Embodiment 2	Embodiment 3
				D4m	4.72	4.72	5.52
d4m	4.28	4.24	4.72
				CP5	/	/	0.45
d0s	5.59	5.65	4.69
				D3s	4.98	4.98	5.62
d3s	3.16	3.16	3.16
				D5s	/	/	5.68
d5s	/	/	5.11
				CP4	0.58	0.58	0.58
L	7.50	7.50	7.50
				EP34	0.39	0.39	0.39
CP3	0.02	0.02	0.02

TABLE 2

It should be understood that in this example, the structures and parameters of each positioning member in the three embodiments are merely exemplified, and the specific structures and actual parameters of each positioning member are not explicitly defined. The specific structure and actual parameters of each positioning member may be set in any suitable manner in actual production.

In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the fifth lens E5 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the aspheric surfacei-th order correction coefficient. The following tables 3-1 and 3-2 give the higher order coefficients A that can be used for each of the aspherical mirror faces S1-S10 in example 1 ₄ 、A ₆ 、A ₈ 、A ₁₀ 、A ₁₂ 、A ₁₄ 、A ₁₆ 、A ₁₈ 、A ₂₀ 、A ₂₂ 、A ₂₄ 、A ₂₆ 、A ₂₈ And A ₃₀ 。

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-7.0863E-04

4.3520E-05

-5.3090E-04

9.1319E-04

-1.0865E-03

9.1016E-04

-5.5009E-04

S2

6.3185E-03

-1.3011E-02

1.9413E-02

-1.4849E-02

2.8955E-03

5.3703E-03

-6.0895E-03

S3

7.7105E-03

-1.5036E-02

2.1138E-02

-8.4936E-03

-1.5597E-02

2.9547E-02

-2.5561E-02

S4

6.5150E-03

-5.2710E-03

8.6189E-03

3.3499E-03

-3.3375E-02

6.2699E-02

-6.8478E-02

S5

2.1159E-03

1.3724E-02

-5.7617E-02

2.4277E-01

-6.4765E-01

1.1464E+00

-1.4015E+00

S6

-1.1629E-03

2.0538E-02

-9.0740E-02

3.7654E-01

-1.0114E+00

1.8370E+00

-2.3281E+00

S7

1.7008E-02

-2.3842E-02

2.9938E-02

-9.0743E-02

2.5712E-01

-5.0031E-01

6.7035E-01

S8

1.5624E-02

-2.6698E-02

2.6600E-02

-2.5144E-02

3.6891E-02

-5.8681E-02

6.8668E-02

S9

-3.2827E-02

-1.3097E-02

4.0783E-02

-6.4876E-02

8.5061E-02

-8.7861E-02

6.8350E-02

S10

-3.6223E-02

8.0760E-03

2.9403E-03

-1.6412E-02

2.8154E-02

-2.9470E-02

2.0803E-02

TABLE 3-1

Face number

A18

A20

A22

A24

A26

A28

A30

S1

2.4072E-04

-7.5750E-05

1.6876E-05

-2.5869E-06

2.5890E-07

-1.5208E-08

3.9732E-10

S2

3.3780E-03

-1.1891E-03

2.8159E-04

-4.4962E-05

4.6613E-06

-2.8414E-07

7.7448E-09

S3

1.3902E-02

-5.1313E-03

1.3111E-03

-2.2941E-04

2.6310E-05

-1.7858E-06

5.4458E-08

S4

5.0118E-02

-2.5676E-02

9.2778E-03

-2.3229E-03

3.8395E-04

-3.7694E-05

1.6643E-06

S5

1.2095E+00

-7.4265E-01

3.2243E-01

-9.6699E-02

1.9047E-02

-2.2159E-03

1.1532E-04

S6

2.0950E+00

-1.3458E+00

6.1234E-01

-1.9251E-01

3.9715E-02

-4.8300E-03

2.6201E-04

S7

-6.3107E-01

4.2133E-01

-1.9885E-01

6.4978E-02

-1.4000E-02

1.7887E-03

-1.0253E-04

S8

-5.4889E-02

2.9961E-02

-1.1215E-02

2.8546E-03

-4.7653E-04

4.7468E-05

-2.1517E-06

S9

-3.9159E-02

1.6228E-02

-4.7620E-03

9.5910E-04

-1.2565E-04

9.6238E-06

-3.2660E-07

S10

-1.0254E-02

3.5636E-03

-8.6741E-04

1.4436E-04

-1.5616E-05

9.8740E-07

-2.7644E-08

TABLE 3-2

Fig. 2A shows an on-axis chromatic aberration curve of the photographing lens of embodiment 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the photographing lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 2A to 2C, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.

Example 2

A photographic lens according to embodiment 2 of the present application is described below with reference to fig. 3A to 4C. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3A to 3C show photographing lenses in three embodiments of example 1, respectively.

As shown in fig. 3A to 3C, the photographing lens sequentially includes, from an object side to an image side: stop STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter (not shown), and imaging plane (not shown).

The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is convex. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has negative refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is concave. The fourth lens element E4 has positive refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is concave, and an image-side surface S10 thereof is concave. The filter has an object side surface S11 and an image side surface S12. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging plane.

In this example, half of the maximum field angle of the photographic lens has a Semi-FOV of 14.5 °, the entrance pupil diameter EPD of the photographic lens is 4.75mm, and the total effective focal length f of the photographic lens is 14.88mm.

As shown in fig. 3A and 3B, the photographing lens may include four positioning members, namely, a first positioning member P1, a second positioning member P2, a third positioning member P3, and a fourth positioning member P4. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fourth positioners P1 to P4.

As shown in fig. 3C, the photographing lens may include five positioning elements, namely a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fifth positioners P1 to P5.

Table 4 shows the basic parameter table of the photographic lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 5 shows basic parameter tables of each positioning member in three embodiments in the photographic lens of example 2, in which each structural parameter is in millimeters (mm). Tables 6-1, 6-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface profiles can be defined by equation (1) given in example 1 above.

TABLE 4 Table 4

TABLE 5

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-6.2078E-04

-4.3809E-04

5.3984E-04

-5.9219E-04

5.0030E-04

-3.3791E-04

1.7282E-04

S2

1.0611E-02

-3.4909E-02

8.8910E-02

-1.3683E-01

1.3711E-01

-9.4424E-02

4.6170E-02

S3

1.2165E-02

-3.8896E-02

9.9917E-02

-1.5387E-01

1.5106E-01

-9.8632E-02

4.3333E-02

S4

8.5403E-03

-1.6184E-02

5.8554E-02

-1.3789E-01

2.2766E-01

-2.7720E-01

2.5321E-01

S5

1.0806E-02

7.9789E-03

-5.2613E-02

2.2490E-01

-5.8827E-01

1.0182E+00

-1.2197E+00

S6

7.9038E-03

2.8723E-02

-1.7922E-01

7.4104E-01

-1.9757E+00

3.5882E+00

-4.5800E+00

S7

-5.3529E-04

1.8539E-02

-1.1831E-01

3.4678E-01

-7.1286E-01

1.0849E+00

-1.2271E+00

S8

8.8560E-03

-8.4353E-03

-2.6267E-02

7.7222E-02

-1.2043E-01

1.5188E-01

-1.5796E-01

S9

-1.7498E-02

-2.4922E-02

5.9923E-02

-1.3470E-01

2.4197E-01

-2.9260E-01

2.3812E-01

S10

-2.5410E-02

-2.9181E-03

2.4932E-02

-5.9429E-02

8.8915E-02

-8.9155E-02

6.2075E-02

TABLE 6-1

Face number

A18

A20

A22

A24

A26

A28

A30

S1

-6.4053E-05

1.6795E-05

-3.0537E-06

3.7335E-07

-2.8989E-08

1.2726E-09

-2.3483E-11

S2

-1.6293E-02

4.1620E-03

-7.6143E-04

9.7059E-05

-8.1620E-06

4.0536E-07

-8.9549E-09

S3

-1.2449E-02

2.0529E-03

-6.5420E-05

-5.0183E-05

1.1469E-05

-1.1021E-06

4.1994E-08

S4

-1.7322E-01

8.7680E-02

-3.2175E-02

8.2864E-03

-1.4163E-03

1.4403E-04

-6.5885E-06

S5

1.0345E+00

-6.2611E-01

2.6870E-01

-7.9881E-02

1.5642E-02

-1.8147E-03

9.4471E-05

S6

4.1758E+00

-2.7312E+00

1.2707E+00

-4.1029E-01

8.7343E-02

-1.1019E-02

6.2389E-04

S7

1.0250E+00

-6.2610E-01

2.7520E-01

-8.4551E-02

1.7212E-02

-2.0855E-03

1.1390E-04

S8

1.2404E-01

-6.9595E-02

2.7168E-02

-7.1801E-03

1.2225E-03

-1.2084E-04

5.2620E-06

S9

-1.3374E-01

5.2545E-02

-1.4390E-02

2.6834E-03

-3.2330E-04

2.2545E-05

-6.8498E-07

S10

-3.0653E-02

1.0816E-02

-2.7094E-03

4.7068E-04

-5.3916E-05

3.6628E-06

-1.1180E-07

TABLE 6-2

Fig. 4A shows an on-axis chromatic aberration curve of the photographing lens of embodiment 2, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the photographing lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 4A to 4C, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.

Example 3

A photographic lens according to embodiment 3 of the present application is described below with reference to fig. 5A to 6C. Fig. 5A to 5C show photographing lenses in three embodiments of example 3, respectively.

As shown in fig. 5A to 5C, the photographing lens sequentially includes, from an object side to an image side: stop STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, filter (not shown), and imaging plane (not shown).

In this example, half of the maximum field angle of the photographic lens has a Semi-FOV of 14.5 °, the entrance pupil diameter EPD of the photographic lens is 4.74mm, and the total effective focal length f of the photographic lens is 14.84mm.

As shown in fig. 5A and 5B, the photographing lens may include four positioning members, namely, a first positioning member P1, a second positioning member P2, a third positioning member P3, and a fourth positioning member P4. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fourth positioners P1 to P4.

As shown in fig. 5C, the photographing lens may include five positioning elements, namely a first positioning element P1, a second positioning element P2, a third positioning element P3, a fourth positioning element P4, and a fifth positioning element P5. The lens barrel P0 may accommodate the first to fifth lenses E1 to E5 and the first to fifth positioners P1 to P5.

Table 7 shows the basic parameter table of the photographic lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows basic parameter tables of each positioning member of the three embodiments in the photographic lens of example 3, in which each structural parameter is in millimeters (mm). Tables 9-1, 9-2 show the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface profiles can be defined by equation (1) given in example 1 above.

TABLE 7

Structural parameters	Embodiment 1	Embodiment 2	Embodiment 3
				D4m	4.90	4.92	5.66
d4m	4.24	3.65	3.71
				CP5	/	/	0.45
d0s	5.59	5.59	4.75
				D3s	4.98	4.98	5.62
d3s	3.14	3.14	3.14
				D5s	/	/	5.74
d5s	/	/	4.40
				CP4	0.02	0.02	0.02
L	7.50	7.50	7.50
				EP34	0.42	0.63	0.72
CP3	0.02	0.02	0.02

TABLE 8

Face number

A4

A6

A8

A10

A12

A14

A16

S1

-6.7697E-04

-2.5024E-04

2.7274E-04

-1.8239E-04

1.3735E-05

5.1589E-05

-3.5928E-05

S2

8.8239E-04

8.1152E-03

-7.1308E-04

-2.5212E-02

4.6274E-02

-4.4128E-02

2.7019E-02

S3

2.9895E-03

4.8983E-03

1.0046E-02

-4.9311E-02

7.8809E-02

-7.2342E-02

4.3390E-02

S4

7.6229E-03

-6.8609E-03

3.4635E-02

-9.8137E-02

1.7280E-01

-2.0768E-01

1.7898E-01

S5

1.0797E-02

6.7436E-03

-4.4192E-02

1.8360E-01

-4.6423E-01

7.7400E-01

-8.9152E-01

S6

8.7863E-03

1.5966E-02

-1.0401E-01

4.4637E-01

-1.2091E+00

2.2064E+00

-2.8105E+00

S7

-2.7624E-03

3.4600E-02

-1.9444E-01

5.6208E-01

-1.1326E+00

1.6751E+00

-1.8403E+00

S8

4.1282E-04

5.8795E-02

-2.6166E-01

5.5984E-01

-7.6850E-01

7.4837E-01

-5.4017E-01

S9

-2.9542E-02

5.1286E-02

-1.9974E-01

3.9559E-01

-4.7734E-01

3.8980E-01

-2.2622E-01

S10

-2.9261E-02

4.4138E-03

8.4145E-03

-3.4139E-02

6.3278E-02

-7.1394E-02

5.3603E-02

TABLE 9-1

TABLE 9-2

Fig. 6A shows an on-axis chromatic aberration curve of the photographic lens of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the photographing lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 6A to 6C, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.

In summary, examples 1 to 3 satisfy the relationships shown in tables 10-1, 10-2 and 10-3, respectively.

TABLE 10-1

/>

TABLE 10-2

TABLE 10-3

The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the photographic lens described above.

The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.

Claims

1. Photographic lens, its characterized in that includes:

the lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens with focal power from an object side to an image side along an optical axis, wherein the image side surface of the fifth lens is a concave surface;

at least one positioning member comprising: a fourth positioning member located on an image side of the fourth lens and in contact with an image side portion of the fourth lens; and

a lens barrel for accommodating the lens group and the at least one positioning member;

wherein, the photographic lens satisfies: (d4m+d4m)/(d4m—d4m) ×|r9/r8| > 33, wherein D4m is the inner diameter of the image side of the fourth fixture, D4m is the outer diameter of the image side of the fourth fixture, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

2. The photographic lens of claim 1, wherein the at least one positioning member further comprises:

a first positioning member located on an image side of the first lens and in contact with an image side portion of the first lens;

a second positioning member located on an image side of the second lens and in contact with an image side portion of the second lens; and

A third positioning member located on an image side of the third lens and in contact with an image side portion of the third lens;

the photographic lens satisfies: d1s > D2s > D3s, wherein D1s is the outer diameter of the object side surface of the first positioning piece, D2s is the outer diameter of the object side surface of the second positioning piece, and D3s is the outer diameter of the object side surface of the third positioning piece.

3. The photographing lens of claim 2, wherein the at least one positioning member further comprises a fifth positioning member located on the image side of the fifth lens and in contact with the image side portion of the fifth lens,

the photographic lens satisfies: 0 < (CP 5+ CP 4)/Σct < 0.3, wherein Σct is the sum of the thicknesses of the centers of the first lens to the fifth lens on the optical axis, CP5 is the maximum thickness of the fifth positioning member, and CP4 is the maximum thickness of the fourth positioning member.

4. The photographic lens of claim 2, wherein the photographic lens satisfies: 45mm of ² ＜π×(D3s^2-d3s^2)＜69mm ² Wherein D3s is the outer diameter of the object side surface of the third positioning member, and D3s is the inner diameter of the object side surface of the third positioning member.

5. A photographic lens as claimed in claim 3, wherein the photographic lens satisfies: 0.3 < D5s/D5s× (f 5-f 4)/(f5+f4) < 4, wherein D5s is the outer diameter of the object side of the fifth positioning member, D5s is the inner diameter of the object side of the fifth positioning member, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

6. The photographic lens of claim 2, wherein the photographic lens satisfies: -33 < R6/R7× (EP 34/CP 3) < -18, wherein R6 is the radius of curvature of the image side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, EP34 is the distance between the image side of the third positioning member and the object side of the fourth positioning member in the direction along the optical axis, CP3 is the maximum thickness of the third positioning member.

7. The photographic lens of claim 3, wherein the lens is,

the inner diameters of the object side surfaces and the image side surfaces of the first positioning piece, the second positioning piece, the third positioning piece, the fourth positioning piece and the fifth positioning piece are the smallest; and

the photographic lens satisfies: 1.4 < d0s/d3s < 1.7, wherein d0s is the inner diameter of the object side end of the lens barrel, and d3s is the inner diameter of the object side surface of the third positioning piece.

8. The photographic lens of any one of claims 1-7, wherein an image side surface of the fifth lens bears against an image side end of the barrel.

9. The photographic lens of any one of claims 1-7, wherein the photographic lens satisfies: 3.7 < 1/tan (Semi-FOV). Times.d0s/EPD < 4.2, wherein d0s is the inner diameter of the object side end of the lens barrel, semi-FOV is half of the maximum field angle of the photographic lens, EPD is the entrance pupil diameter of the photographic lens.

10. The photographic lens of any one of claims 1-7, wherein the photographic lens satisfies: 0.3 < CP4/T45 < 12, wherein T45 is an air gap of the fourth lens and the fifth lens on the optical axis, and CP4 is a maximum thickness of the fourth positioning member.

11. The photographic lens of any one of claims 1-7, wherein the photographic lens satisfies: 8 < (f×f)/(Σat×l) < 14, where f is the total effective focal length of the photographic lens, L is the maximum length of the lens barrel, Σat is the sum of air intervals on the optical axis of any adjacent two lenses of the first to fifth lenses.

12. Photographic lens, its characterized in that includes:

at least one positioning member comprising: a third positioning member located on an image side of the third lens and in contact with an image side portion of the third lens; and

Wherein, the photographic lens satisfies: 45mm of ² ＜π×(D3s^2-d3s^2)＜69mm ² Wherein D3s is the outer diameter of the object side surface of the third positioning member, and D3s is the inner diameter of the object side surface of the third positioning member.

13. The photographic lens of claim 12, wherein the at least one positioning member further comprises:

a first positioning member located on an image side of the first lens and in contact with an image side portion of the first lens; and

a second positioning member located on an image side of the second lens and in contact with an image side portion of the second lens;

14. The photographic lens of claim 13, wherein the at least one positioning member further comprises:

a fourth positioning member located on an image side of the fourth lens and in contact with an image side portion of the fourth lens; and

a fifth positioning member located on an image side of the fifth lens and in contact with an image side portion of the fifth lens,

15. The photographic lens of claim 14, wherein the photographic lens satisfies: 0.3 < D5s/D5s× (f 5-f 4)/(f5+f4) < 4, wherein D5s is the outer diameter of the object side of the fifth positioning member, D5s is the inner diameter of the object side of the fifth positioning member, f4 is the effective focal length of the fourth lens, and f5 is the effective focal length of the fifth lens.

16. The photographic lens of claim 14, wherein the photographic lens satisfies: -33 < R6/R7× (EP 34/CP 3) < -18, wherein R6 is the radius of curvature of the image side of the third lens, R7 is the radius of curvature of the object side of the fourth lens, EP34 is the distance between the image side of the third positioning member and the object side of the fourth positioning member in the direction along the optical axis, CP3 is the maximum thickness of the third positioning member.

17. The photographic lens of claim 14, wherein the lens is configured to,

18. The photographic lens of any one of claims 12-17, wherein an image side surface of the fifth lens bears against an image side end of the barrel.

19. The photographic lens of any one of claims 12-17, wherein the photographic lens satisfies: 3.7 < 1/tan (Semi-FOV). Times.d0s/EPD < 4.2, wherein d0s is the inner diameter of the object side end of the lens barrel, semi-FOV is half of the maximum field angle of the photographic lens, EPD is the entrance pupil diameter of the photographic lens.

20. The photographic lens of any one of claims 14-17, wherein the photographic lens satisfies: 0.3 < CP4/T45 < 12, wherein T45 is an air gap of the fourth lens and the fifth lens on the optical axis, and CP4 is a maximum thickness of the fourth positioning member.

21. The photographic lens of any one of claims 12-17, wherein the photographic lens satisfies: 8 < (f×f)/(Σat×l) < 14, where f is the total effective focal length of the photographic lens, L is the maximum length of the lens barrel, Σat is the sum of air intervals on the optical axis of any adjacent two lenses of the first to fifth lenses.