Lens assembly and electronic equipment

Abstract

The invention provides a lens assembly and electronic equipment, and the lens assembly comprises a lens barrel which comprises a barrel part and a reference part disposed on the inner wall of the barrel part, the reference part is provided with at least two positioning references arranged along a first direction, and the first direction is the length direction of the lens barrel; the at least two locking rings are respectively fixed on the inner wall and are arranged along the first direction; at least two lenses, a first lens of the at least two lenses is fixed between a first positioning reference of the at least two positioning references and a first locking ring of the at least two locking rings, and the first lens is in contact with the first positioning reference; a second lens in the at least two lenses is fixed between a second positioning reference in the at least two positioning references and a second locking ring in the at least two locking rings, and the second lens is in contact with the second positioning reference. The assembly precision of the lens assembly can be improved.

Description

Technical Field

[0001] The present application relates to the field of lens technology, and in particular to a lens assembly and an electronic device. Background Art

[0002] In the fields of automotive, security, aerospace, etc., cameras and other electronic devices need to use lens assemblies. The lens assembly usually includes a lens barrel, multiple lenses fixed on the inner wall of the lens barrel, a spacer fixed between two adjacent lenses, and a locking ring.

[0003] In order to correct the phase difference and achieve focusing, imaging and other functions, the parameters of each lens in the lens assembly can be adjusted, and lenses with convex and concave mirror surfaces can be used in combination. In this way, the mirror surface in contact with the spacer may be convex or concave. When the mirror surface in contact with the spacer is convex, the contact between the mirror surface and the spacer is line contact, and the guiding effect of the locking ring along the length of the lens barrel will cause the mirror surface to slip and tilt. The lens assembly includes multiple lenses, which will cause cumulative errors, resulting in low assembly accuracy of the lens assembly. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a lens assembly and an electronic device, which can improve the assembly accuracy of the lens assembly.

[0005] The present application provides a lens assembly, which can be applied to an electronic device, such as a camera, etc. The lens assembly includes: a lens barrel, at least two locking rings, and at least two lenses.

[0006] The lens barrel includes a barrel portion and a reference portion arranged on the inner wall of the barrel portion, wherein the reference portion has at least two positioning references arranged along a first direction, the first direction being the length direction of the lens barrel, and the at least two positioning references may include a first positioning reference and a second positioning reference.

[0007] At least two locking rings are respectively fixed on the inner wall of the lens barrel and arranged along the first direction. The at least two locking rings include a first locking ring and a second locking ring, and the first locking ring and the second locking ring are respectively fixed on the inner wall of the lens barrel, and the first locking ring and the second locking ring are arranged along the first direction.

[0008] At least two lenses are fixed to the inner wall of the lens barrel. The at least two lenses may include one first lens or multiple first lenses. When the at least two lenses include one first lens, the mirror surface of the first lens may be a convex surface. The first lens is fixed between the first positioning reference and the first locking ring, and the first lens is in contact with the first positioning reference. When the at least two lenses include multiple first lenses, the mirror surface of one of the multiple first lenses may be a convex surface, and the mirror surfaces of the remaining first lenses may be concave surfaces. The multiple first lenses are arranged along the first direction and are all fixed between the first positioning reference and the first locking ring.

[0009] The at least two lenses may include one second lens or multiple second lenses. When the at least two lenses include one second lens, the mirror surface of the second lens may be a convex surface. The second lens is fixed between the second positioning reference of the at least two positioning references and the second locking ring of the at least two locking rings, and the second lens is in contact with the second positioning reference. When the at least two lenses include multiple second lenses, the mirror surface of one of the multiple second lenses may be a convex surface, and the mirror surface of the regional second lens may be a concave surface. The multiple second lenses are arranged along the first direction and are all fixed between the second positioning reference and the second locking ring.

[0010] In the process of assembling the lens assembly, after the lens barrel and all the lenses are manufactured, the first lens can be fixed to the inner wall of the lens barrel, and the first lens is brought into contact with the first positioning reference, the first locking ring is installed into the lens barrel from the end of the first lens away from the first positioning reference, and the first lens is locked to a fixed position in the lens barrel. The second lens can also be fixed to the inside of the lens barrel, and the second lens is brought into contact with the second positioning reference, the second locking ring is installed into the lens barrel from the end of the second lens away from the second positioning reference, and the second lens is locked to a fixed position in the lens barrel. Thus, the assembly of the lens assembly is completed.

[0011] When the assembly error generated after the first lens is installed in the lens barrel affects the assembly error generated after the second lens is installed in the lens barrel, it will lead to error accumulation, thereby causing the first lens or the second lens to tilt or shift in center, and the tilt amount is large and the shift amount is also large. Since in the present application, the first lens is fixed between the first positioning reference and the first locking ring, and the second lens is fixed between the second positioning reference and the second locking ring, the assembly error of the first lens and the assembly error of the second lens do not affect each other, and the first lens or the second lens will not have a large tilt or shift amount. In other words, the present application can improve the assembly accuracy of the lens assembly, thereby improving the production yield.

[0012] Moreover, the present application adopts the above structure, which can achieve a higher assembly accuracy, so there is no need to set a shoulder structure. When producing the lens, there is no need to add a shoulder process on the basis of the existing process, thereby reducing the processing cost of the lens. Moreover, there will be no problem of low assembly accuracy of the lens and the lens barrel due to the difficulty in ensuring the flatness of the shoulder structure. In addition, there will be no problem of poor structural strength of the lens due to the addition of the shoulder structure, and stress concentration will easily occur when the force is applied, causing the lens to be fragile. Finally, there will be no problem of increasing the overall size of the lens due to the addition of the shoulder structure, thereby increasing the overall size of the lens assembly.

[0013] In some embodiments, the barrel portion includes at least two barrels arranged and connected along a first direction, the first locking ring and the first lens are both fixed in the first barrel of the at least two barrels, and the second locking ring and the second lens are both fixed in the second barrel of the at least two barrels. A first installation space may be formed between the first locking ring and the first positioning reference, and the first lens may be fixed in the first installation space; a second installation space may be formed between the second locking ring and the second positioning reference, and the second lens may be fixed in the second installation space.

[0014] In some embodiments, the first barrel and the second barrel are connected to form an integral structure. The integral structure may refer to being made by an integral molding method. When the barrel portion includes two barrels, and the first barrel and the second barrel of the two barrels are connected to form an integral structure, the barrel portion may be made by a one-time molding method. For example, the barrel portion may be made by injection molding or the like. In this way, the manufacturing process of the barrel portion is relatively simple, and the assembly process is also relatively simple.

[0015] In some embodiments, the reference portion is an integrated structure. For example, the reference portion can be a plate-shaped structure. The reference portion in a plate-shaped structure can be fixed to the inner wall of the barrel, and the reference portion is located in the middle of the barrel. The first locking ring and the second locking ring are respectively located on both sides of the reference portion. The surface of the reference portion facing the first locking ring is the first positioning reference, and the first lens is fixed between the reference portion and the first locking ring. The surface of the reference portion facing the second locking ring is the second positioning reference, and the second lens is fixed between the reference portion and the second locking ring.

[0016] Regarding the structure of the lens barrel composed of the reference part and the barrel, in a possible implementation, the lens barrel can be manufactured in an integrated manner, such as injection molding. In another possible implementation, the reference part and the barrel can be manufactured separately, and then the lens barrel is manufactured by gluing or laser welding.

[0017] Moreover, the reference part is provided with a through hole extending in the first direction. The cross-sectional shape of the lens barrel is annular. The through hole provided on the reference part can be a circular hole or a square hole. When the through hole is a circular hole, the cross-sectional shape of the reference part is also annular, that is, the shape of the first positioning reference is annular. The first lens is fixed between the reference part and the first locking ring, and the first positioning reference of the surface of the reference part in contact with the first lens. When the mirror surface of the first lens in contact with the first positioning reference is a concave surface, the surface of the concave surface away from the center is in contact with the first positioning reference; when the mirror surface of the first lens in contact with the first positioning reference is a convex surface, the contact mode of the convex surface with the first positioning reference is line contact. It can be seen that the first lens is in contact with a part of the surface of the first positioning reference. After the through hole is provided on the reference part, the first lens can contact the first positioning reference in the shape of an annular ring, and the reference part and the first locking ring can realize the fixing effect on the first lens. Moreover, the provision of the through hole can also reduce the weight of the reference part, thereby reducing the weight of the lens assembly, so as to achieve a lightweight design of the lens assembly.

[0018] In some embodiments, the third barrel and the fourth barrel of the at least two barrels are connected to form a split structure. When the barrel portion includes the third barrel and the fourth barrel, the third barrel and the fourth barrel are connected to form a split structure, which means that when manufacturing the barrel portion, the third barrel and the fourth barrel are first manufactured separately, and then the third barrel and the fourth barrel are connected by gluing, laser welding or other connecting parts to form the barrel portion.

[0019] The reference portion includes at least two bosses arranged along a first direction. The cross-sectional shape of the boss may be a circular ring. The first boss, the first locking ring and the first lens of at least two bosses are all fixed in the third barrel, and the first lens is located between the first boss and the first locking ring. The second boss, the second locking ring and the second lens of at least two bosses are all fixed in the fourth barrel, and the second lens is located between the second boss and the second locking ring. In this way, during the use of the lens assembly, if the first barrel is damaged but the second barrel is not damaged, only the first barrel can be replaced, thereby reducing the maintenance cost of the lens assembly.

[0020] In some embodiments, the lens barrel further comprises a first convex portion fixed to the outer wall of the third barrel and a second convex portion fixed to the outer wall of the fourth barrel, and the first convex portion abuts against the second convex portion. When the first barrel and the second barrel are connected, the first convex portion and the second convex portion can be connected by gluing or laser welding, and the surfaces of the first barrel and the second barrel that are in contact can be connected by gluing or laser welding, thereby achieving the connection between the first barrel and the second barrel. In this way, the connection area between the first barrel and the second barrel can be increased, thereby improving the connection strength between the first barrel and the second barrel.

[0021] In some embodiments, the lens barrel further comprises a first connecting portion, a first portion of the first connecting portion is disposed on the outer wall of the third barrel, and a second portion of the first connecting portion is disposed on the outer wall of the fourth barrel. In this way, the distance between the third barrel and the fourth barrel can be adjusted by adjusting the connection position of the first connecting portion on the outer wall of the third barrel, and adjusting the connection position of the first connecting portion on the outer wall of the fourth barrel. The first lens can be located in the third barrel, and the second lens can be located in the fourth barrel, and the spacing error between the first lens and the second lens can be adjusted so that the spacing error meets the error requirement.

[0022] Moreover, the first connection part is provided on the outer wall of the third barrel and the fourth barrel in a threaded connection manner. That is, the first part of the first connection part is provided on the outer wall of the third barrel in a threaded connection manner, and the second part of the first connection part is provided on the outer wall of the fourth barrel in a threaded connection manner. During the process of assembling the lens assembly, the spacing error between the third barrel and the fourth barrel can be adjusted by adjusting the length of the third barrel screwed into the first connection part, or adjusting the length of the fourth barrel screwed into the first connection part, thereby making the adjustment process of the spacing error between the third barrel and the fourth barrel simpler.

[0023] In a possible implementation, the first connection part is an integrated structure, which means that the first connection part is made of an integrated structure, for example, the first connection part is made by injection molding, so that the structure of the first connection part is relatively simple and easy to manufacture.

[0024] In another possible embodiment, the first connecting part is a split structure. The first connecting part includes a first connecting body and a second connecting body arranged and connected along a first direction, and the surfaces of the first connecting body and the second connecting body are in contact and connected. The first connecting body is connected to the outer wall of the third barrel, and the second connecting body is connected to the outer wall of the fourth barrel. The first connecting body and the second connecting body can be connected by gluing or laser welding. Since the first connecting part is a split structure, the spacing error between the third barrel and the fourth barrel can be adjusted by adjusting the connection position of the third barrel on the first connecting body and adjusting the connection position of the fourth barrel on the second connecting body, thereby adjusting the spacing error between the first lens and the second lens. The position of the first connecting body on the second connecting body can also be adjusted along the second direction and the third direction to adjust the center offset error between the first lens and the second lens. Wherein, the second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction. It can be seen that in this embodiment, the spacing error between the first lens and the second lens can be adjusted, and the center offset error between the first lens and the second lens can also be adjusted from the second direction and the third direction respectively.

[0025] The lens barrel includes at least three barrels arranged along a first direction. In a possible implementation, the at least three barrels are connected to form a split structure. In this way, each barrel can be replaced individually when damaged, thereby reducing the maintenance cost of the lens assembly.

[0026] In another possible implementation, among the at least three cylinders, some two adjacent cylinders are connected to form an integral structure, and some two adjacent cylinders are connected to form a split structure. In this way, the manufacturing process of the two cylinders with an integral structure is relatively simple.

[0027] When at least three cylinders are connected to form a split structure, a first connection portion is connected between every two cylinders connected to form a split structure. With respect to the structure of the first connection portion, in a possible embodiment, each first connection portion is an integrated structure. In this way, the structure of each first connection portion is relatively simple, and the assembly between the first connection portion and the cylinder is relatively simple.

[0028] In another possible implementation, each first connecting portion is a split structure. In this way, the lens spacing error between lenses fixed inside different barrels can be adjusted, and the center offset error of lenses fixed inside different barrels can also be adjusted. As a result, the assembly accuracy of the lens assembly is higher.

[0029] In another possible implementation, part of the first connection part is an integrated structure, and part of the first connection part is a split structure. When assembling the lens assembly, if the center offset error between the lenses in the two barrels meets the center offset error requirement, the outer walls of the two barrels can be connected to the first connection part of the integrated structure; if the center offset error between the lenses in the two barrels exceeds the center offset error requirement, the outer walls of the two barrels can be connected to the first connection part of the split structure. In this way, the assembly accuracy of the lens assembly can meet the assembly accuracy requirement, and the structure of the lens assembly can be simplified to a certain extent.

[0030] When two partially adjacent cylinders among at least three cylinders are connected as an integral structure, and two partially adjacent cylinders are connected as a split structure, a first connection portion is connected between the cylinder connected as an integral structure and the cylinder connected as a split structure. In one possible embodiment, the first connection portion is an integral structure. In another possible embodiment, the first connection portion is a split structure. When there are multiple first connection portions, all of the multiple first connection portions are integral structures; or, all of the multiple first connection portions are split structures; or, some of the multiple first connection portions are integral structures, and the remaining first connection portions are split structures.

[0031] The lens assembly further comprises a collar. The collar is fixed to the inner wall of the lens barrel. The outer surface of the collar fits with the inner wall of the lens barrel and has an interference fit. That is, the cross-sectional shape of the inner wall of the lens barrel is usually circular, and the outer surface of the cross-sectional shape of the collar is circular, then the diameter of the outer surface of the collar is slightly larger than the diameter of the inner wall of the lens barrel. At least one of the at least two lenses is fixed to the inner wall of the collar. At least one lens and the collar may also have an interference fit.

[0032] In the present application, by adding a ring between the lens barrel and at least one lens, when the ring is made of a material with high processing accuracy, the error between the center line of the ring and the center line of the inner wall of the lens barrel can be made smaller, thereby making it possible to reduce the error between the center line of the lens fixed to the inner wall of the ring and the center line of the inner wall of the lens barrel. This can reduce the center offset error of the lens in the lens assembly, thereby improving the assembly accuracy of the lens assembly.

[0033] In some embodiments, the material of the collar includes plastic. Specifically, it may include optical grade plastic material, and the processing accuracy of such material can be up to 0.1 μm, that is, the processing accuracy of such material is between 0.1 μm and 0.9 μm. This can further improve the processing accuracy of the collar, thereby further improving the assembly accuracy of the lens assembly.

[0034] In addition, during the use of the lens assembly, both the lens and the collar will generate heat, and the thermal characteristics of the lens and the collar will be affected. For example, the optical parameters of the lens, such as the refractive index, the aperture of the lens, the center thickness of the lens, the interval between adjacent lenses, etc., will change with temperature. The outer diameter, inner diameter, length, etc. of the cross section of the collar will also change with temperature. When the material of the lens is different from the material of the collar, this will cause the amount of change in the optical parameters of the lens to be different from the amount of change in the parameters of the collar. And when the difference between the thermal expansion coefficient of the material of the lens and the thermal expansion coefficient of the material of the collar is large, the image plane of the lens assembly will drift, that is, a temperature drift problem will occur. When the material of the collar includes plastic, since the processing accuracy of plastic is high, the temperature drift problem can be considered in the design stage by adjusting the optical parameters of the lens or the parameters of the collar, thereby improving the temperature drift problem.

[0035] Regarding the connection relationship between the at least two lenses, the collar and the lens barrel, in a possible implementation, some of the at least two lenses are fixed to the inner wall of the collar, and the remaining lenses are fixed to the inner wall of the lens barrel and in contact with the inner wall of the lens barrel. In other words, some of the lenses are fixed to the inner wall of the lens barrel through the collar, and the remaining lenses are directly fixed to the inner wall of the lens barrel. In practical applications, the materials of different lenses may be different, so the lens with lower processing accuracy can be fixed to the inner wall of the collar, and the lens with higher processing accuracy can be fixed to the inner wall of the lens barrel.

[0036] In another possible implementation, each lens is fixed to the inner wall of the ring, so that the center deviation error of each lens can be ensured to be small.

[0037] The collar includes at least two ring bodies fixed in a first barrel of at least two barrel bodies and arranged along a first direction, and the first direction is the length direction of the barrel. When the length of the collar is too long and a plurality of lenses are fixed in one collar, the lens located in the middle of the collar is not easy to assemble due to the interference fit between the lens and the collar. Therefore, when the collar includes at least two ring bodies, the length of each ring body is relatively short, thereby making it easy to assemble the lens and the ring body. In addition, the assembly accuracy of the lens and the ring body can be improved.

[0038] Regarding the relationship between the number of ring bodies and lenses, in a possible implementation, the number of ring bodies is less than the number of first lenses. In this case, the first part of the first lenses is fixed to the inner wall of the first ring body among at least two ring bodies, and the second part of the first lenses is fixed to the inner wall of the second ring body among at least two ring bodies. When the number of ring bodies is two, and the number of first lenses is more than two, one first lens is fixed to the inner wall of the first ring body, and multiple first lenses are fixed to the inner wall of the second ring body; or, multiple first lenses are fixed to the inner wall of the first ring body, and one first lens is fixed to the inner wall of the second ring body; or, multiple first lenses are fixed to the inner wall of the first ring body, and multiple first lenses are fixed to the inner wall of the second ring body. In this way, when the processing accuracy of each ring body is high, it can be ensured that the center offset error of each first lens meets the center offset error requirement.

[0039] In another possible implementation, the number of the ring bodies is the same as the number of the first lenses. In this case, each first lens is fixed to the inner wall of each ring body. In this way, when the processing accuracy of each ring body is high, it can be ensured that the center offset error of each first lens meets the center offset error requirement.

[0040] Regarding the distance between two adjacent ring bodies, in a possible implementation, there is no gap between the two adjacent ring bodies, that is, the two adjacent ring bodies are in contact with each other. In this way, when the two adjacent ring bodies are assembled on the inner wall of the lens barrel, one of the ring bodies can be used to position the other ring body along the first direction, thereby making the assembly of the ring bodies more convenient.

[0041] Moreover, the surface connecting the two adjacent ring bodies is a step surface. That is to say, in the two adjacent ring bodies, the surface of the first ring body facing the second ring body is a step surface, and the surface of the second ring body facing the first ring body is also a step surface. The two adjacent ring bodies can be connected by gluing or laser welding. When the surface connecting the two adjacent ring bodies is a step surface, the two ring bodies can be connected not only through the surface perpendicular to the first direction, but also through the surface parallel to the first direction, thereby increasing the connection area of ​​the two ring bodies, thereby improving the connection strength of the two ring bodies.

[0042] In addition, the lens assembly further includes a first spacer, which is located inside the ring body and is fixed between two adjacent first lenses. When there are two first lenses located inside the same ring body, the number of first spacers located inside the ring body can be one, and the first spacer can be fixed between the two first lenses; when the number of first lenses located inside the same ring body is more than two, the number of first spacers located inside the ring body can be one less than the number of first lenses, and one first spacer is fixed between every two adjacent first lenses. When assembling the lens assembly, the first lenses and the first spacers can be successively installed into the ring body in a specific order, and then the ring body equipped with the first lenses and the first spacers can be fixed in the lens barrel, so as to realize the assembly of the lens assembly. By setting the first spacer, the spacing requirement between two adjacent first lenses can be met.

[0043] In another possible implementation, there is a spacing between two adjacent ring bodies. In this case, the size of the ring body along the first direction may be the same as the size of the mounting surface of the first lens and the ring body along the first direction. Then, the spacing between the two adjacent ring bodies is the same as the spacing between the two adjacent first lenses. This can reduce the size of the collar along the first direction, thereby reducing the volume of the collar, and further reducing the cost of the lens assembly.

[0044] The lens assembly also includes a second spacer, which is fixed between two adjacent ring bodies. Since the two adjacent first lenses are respectively fixed inside the two adjacent ring bodies, when the second spacer is fixed between the two adjacent ring bodies, the second spacer plays a role of separating the two adjacent ring bodies and also plays a role of separating the two adjacent first lenses. Therefore, by setting the second spacer, the spacing requirement between the two adjacent first lenses can be met.

[0045] Moreover, the surface of the second spacer facing the ring body covers a portion of the surface of the ring body facing the second spacer, and covers a portion of the surface of the first lens. Since the second spacer can usually be made of plastic or plastic, when the surface of the second spacer also covers a portion of the surface of the first lens, it can also absorb stray light emitted from the edge of the first lens, thereby improving the performance of the lens assembly.

[0046] Regarding the material of the lens, in a possible implementation, the material of each lens includes glass. When the lens has a larger diameter, the material of the lens may include glass, which is convenient for processing.

[0047] In another possible implementation, the material of each lens includes plastic. When the aperture of the lens is relatively small, the material of each lens may include plastic. This can reduce the processing cost. In addition, each lens can have high processing accuracy, low water absorption, high temperature resistance, high consistency and be suitable for mass and automated production, which can reduce the processing cost. In addition, the shape of the lens can be made to have a high degree of freedom, and an aspherical surface can be processed and have aspherical characteristics, so that one lens can realize multiple functions, thereby reducing the number of lenses and further reducing the volume of the lens assembly.

[0048] In another possible implementation, the material of a portion of the lenses includes glass, and the material of another portion of the lenses includes plastic. For lenses with larger calibers, the material may include glass; for lenses with smaller calibers, the material may include plastic, thereby reducing the processing cost of the lens assembly to a certain extent. In this way, the material selection of each lens can be comprehensively determined based on the caliber of the lens and the volume of the lens assembly.

[0049] In some embodiments, the material of the lens is the same as that of the ring. When the material of the lens is the same as that of the ring, the change in the optical parameters of the lens is relatively close to the change in the parameters of the ring, so that the image plane of the lens assembly does not drift or the drift is small, which meets the drift requirement. In other words, this embodiment can improve the temperature drift problem. Moreover, after the structure and parameter design of the lens assembly is completed, a simulation experiment can be carried out on the lens assembly to test the impact of the temperature drift problem on the performance of the lens assembly. In addition, when the material of the lens is the same as that of the ring, during the use of the lens assembly, the stress concentration point after the lens generates thermal expansion will be transferred to the ring, and the ring can act as a buffer for the lens, thereby effectively improving the problems of extrusion deformation and tilt of the lens.

[0050] The present application also provides an electronic device, comprising a housing and a lens assembly according to any one of the above embodiments, wherein the lens assembly is fixed in the housing. The electronic device can achieve all the effects of the lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0052] Figure 1a A schematic diagram of an assembly relationship between a lens barrel, a lens and a locking ring when the lens assembly includes a lens;

[0053] Figure 1b It is a schematic diagram of another assembly relationship of the lens barrel, the lens and the locking ring when the lens assembly includes a lens;

[0054] Figure 1c Figure 1a A schematic diagram of the assembly relationship between the lens barrel, lens and locking ring when the middle mirror surface slips and tilts;

[0055] Figure 2a is a schematic diagram of another assembly relationship of the lens barrel, the lens and the locking ring when multiple mirror surfaces in the lens assembly are convex surfaces;

[0056] Figure 2b is a schematic diagram of another assembly relationship of the lens barrel, the lens and the locking ring when one of the mirror surfaces of the lens assembly is a convex surface;

[0057] Figure 3a is a schematic diagram of the assembly relationship between the spacer and the first lens;

[0058] Figure 3b is a schematic diagram of the assembly relationship between the spacer and the second lens;

[0059] Figure 3c is a schematic diagram of the assembly relationship between the spacer and the third lens;

[0060] Figure 3d is a schematic diagram of the assembly relationship between the spacer and the fourth type of lens;

[0061] Figure 3e is a schematic diagram of the assembly relationship between the spacer and the fifth lens;

[0062] Figure 3f is a schematic diagram of the assembly relationship between the spacer and the sixth lens;

[0063] Figure 4 It is a structural schematic diagram of a lens assembly in the related art;

[0064] Figure 5 for Figure 4 Schematic diagram of the structure of the middle lens;

[0065] Figure 6a This is a schematic structural diagram of a lens assembly in the first embodiment of the present application;

[0066] Figure 6b This is a structural schematic diagram of a lens assembly in the second embodiment of the present application;

[0067] Figure 7 for Figure 6a A schematic diagram of the structure of the lens barrel in the lens assembly shown;

[0068] Figure 8a This is a structural schematic diagram of a lens assembly in the third embodiment of the present application;

[0069] Figure 8b This is a structural schematic diagram of a lens assembly in a fourth embodiment of the present application;

[0070] Fig. 9 This is a structural schematic diagram of a lens assembly in a fifth embodiment of the present application;

[0071] Fig.10 This is a structural schematic diagram of a lens assembly in a sixth embodiment of the present application;

[0072] Fig.11 This is a structural schematic diagram of a lens assembly in a seventh embodiment of the present application;

[0073] Fig.12a This is a structural schematic diagram of a lens assembly in an eighth embodiment of the present application;

[0074] Figure 12b This is a structural schematic diagram of a lens assembly in a ninth embodiment of the present application;

[0075] Fig.13a This is a structural schematic diagram of a lens assembly in a tenth embodiment of the present application;

[0076] Fig.13b This is a structural schematic diagram of a lens assembly in the eleventh embodiment of the present application;

[0077] Fig.13c This is a structural schematic diagram of a lens assembly in the twelfth embodiment of the present application;

[0078] Fig.14a This is a structural schematic diagram of a lens assembly in the thirteenth embodiment of the present application;

[0079] Fig.14b This is a structural schematic diagram of a lens assembly in the fourteenth embodiment of the present application;

[0080] Fig.15 This is a structural schematic diagram of a lens assembly in the fifteenth embodiment of the present application;

[0081] Fig.16 This is a structural schematic diagram of a lens assembly in the sixteenth embodiment of the present application;

[0082] Fig.17a This is a structural schematic diagram of a lens assembly in the seventeenth embodiment of the present application;

[0083] Fig.17b This is a structural schematic diagram of a lens assembly in the eighteenth embodiment of the present application;

[0084] Fig.17c This is a structural schematic diagram of a lens assembly in the nineteenth embodiment of the present application.

[0085] Icons: 1-lens assembly; 10-lens barrel; 11-barrel; 111-barrel body; 112-first barrel body; 113-second barrel body; 114-internal thread; 115-third barrel body; 116-first end; 117-second end; 12-reference part; 121-positioning reference; 122-first positioning reference; 123-second positioning reference; 124-through hole; 125-first installation space; 126-second installation space; 127-boss; 1271-first boss; 1272-second boss; 13 -first protrusion; 14-second protrusion; 15-first connecting part; 151-first connecting body; 152-second connecting body; 20-lens; 21-shoulder structure; 22-first lens; 23-second lens; 24-third lens; 25-fourth lens; 28-center line; 29-center of curvature; 30-spacer; 40-locking ring; 41-first locking ring; 411-external thread; 42-second locking ring; 50-ring; 51-ring body; 511-first ring body; 512-second ring body; 52-step surface. DETAILED DESCRIPTION

[0086] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0087] The term "and / or" herein is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone, wherein A and B may be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (item)" refers to one or more, and "plurality" refers to two or more. "At least one of the following (items)" or similar expressions refers to any combination of these items, including any combination of single (items) or plural (items). For example, at least one (item) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or multiple.

[0088] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0089] "Connected", "connected" and similar words are used to express the intercommunication or interaction between different components, which may include direct connection or indirect connection through other components. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, inclusion of a series of steps or units. Methods, systems, products or devices are not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. "Up", "down", "left", "right" and the like are only used relative to the orientation of the components in the drawings. These directional terms are relative concepts. They are used for description and clarification relative to the description, which may change accordingly according to the change of the orientation of the components in the drawings.

[0090] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0091] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0092] In the fields of automotive, security, aerospace, etc., electronic devices such as cameras need to use lens components 1 to obtain the required images. Figure 1a and Figure 1b As shown, the lens assembly 1 generally includes a lens barrel 10 and a lens 20 fixed on the inner wall of the lens barrel 10 .

[0093] Since a single lens 20 is difficult to achieve good focusing, imaging and other functions, Figure 2a and Figure 2b As shown, the number of lenses 20 is usually multiple, and the multiple lenses 20 are arranged along the length direction of the lens barrel 10. Moreover, the aberration can be corrected by adjusting the parameters of each lens 20 in the lens assembly 1, and by combining the lenses 20 with convex and concave surfaces, so as to achieve focusing, imaging and other functions.

[0094] There is a certain distance between each two adjacent lenses 20. Figure 2a As shown, the air gap between the adjacent lenses 20 can be achieved by fixing a spacer 30 between two adjacent lenses 20 .

[0095] like Figure 2a As shown, the lens assembly 1 may further include a locking ring 40 , which is fixed to the inner wall of the lens barrel 10 , and the locking ring 40 contacts the lens 20 to lock the lens 20 to a fixed position of the lens barrel 10 .

[0096] Since in the lens assembly 1, the lens 20 with a flat, convex, or concave mirror surface may be used in combination, the mirror surface in contact with the spacer 30 may be a convex surface, a concave surface, or a flat surface. Figure 3a and Figure 3b As shown, when the mirror surface on the lens 20 that contacts the spacer 30 is a concave surface or a flat surface, the contact between the mirror surface and the spacer 30 is surface contact. In this case, the connection between the lens 20 and the spacer 30 is firm, that is, the lens 20 is fixed relatively firmly in the lens barrel 10. Figure 3c , Figure 3d , Figure 3e and Figure 3f As shown, when the mirror surface in contact with the spacer 30 is a convex surface, the contact between the mirror surface and the spacer 30 is a line contact, and the guiding effect of the spacer 30 along the length direction of the lens barrel 10 will cause the mirror surface to slide and tilt.

[0097] It is understandable that if Figure 1a As shown in FIG. 2 , when the mirror surface does not slip and tilt, the center of curvature 29 of the mirror surface coincides with the center line 28 of the lens. Figure 1c As shown, when the mirror surface slides and tilts, the center of curvature 29 of the mirror surface does not coincide with the center line 28 of the lens.

[0098] like Figure 2a As shown, four lenses 20 are fixed in the lens barrel 10. When the two mirror surfaces of each lens 20 are convex, the contact between each convex surface and the spacer 30 is line contact, the contact between the convex surface and the locking ring 40 is also line contact, and the contact between the convex surface and the positioning reference 121 of the lens barrel 10 is line contact. It can be seen that Figure 2a In the lens assembly 1 shown, the number of line contacts is greater than two, which will lead to error accumulation, thereby causing a more serious mirror slip and tilt.

[0099] like Figure 2bAs shown, four lenses 20 are also fixed in the lens barrel 10, and the mirror surfaces of three of the lenses 20 are all flat. One of the mirror surfaces of one lens 20 is flat, and the other mirror surface is convex. The contact mode between the lens 20 and the positioning reference 121 is line contact, and the other contact modes are all surface contact. Therefore, in Figure 2b In the lens assembly 1 shown, the number of line contacts is one, so the slip and tilt error of the mirror surface meets the error requirement.

[0100] In view of this, in a related technology, such as Figure 4 As shown, the lens barrel 10 is usually a single lens barrel 10, and a plurality of lenses 20 are fixed to the inner wall of the lens barrel 10, and every two lenses 20 are separated by a spacer 30. The interior of the lens barrel 10 has a positioning reference 121, and the lens 20 closest to the positioning reference 121 contacts the positioning reference 121. The locking ring 40 is fixed to the lens 20 farthest from the positioning reference 121 to lock each lens 20 to the inner wall of the lens barrel 10.

[0101] like Figure 5 As shown, for a lens 20 with a convex mirror surface, a shoulder structure 21 is processed on the lens 20 through edge milling or other shoulder adding processes. Figure 4 As shown, the shoulder structure 21 can contact with the locking ring 40 to form a surface contact, thereby improving the assembly accuracy. Moreover, the spacer 30 and the lens 20 are also in surface contact, which is relatively stable during the assembly process and is not prone to slippage and tilting.

[0102] However, in the related art, when producing the lens 20, it is necessary to add a shoulder adding process on the basis of the existing process, which will increase the processing cost of the lens 20. Moreover, the flatness of the shoulder structure 21 is difficult to ensure, that is, the precision of the shoulder structure 21 is low. In addition, the addition of the shoulder structure 21 causes the structural strength of the lens 20 to deteriorate, and stress concentration is prone to occur when subjected to force, causing the lens 20 to be fragile. Finally, the addition of the shoulder structure 21 causes the overall size of the lens 20 to increase, thereby causing the overall size of the lens assembly 1 to increase, which is not conducive to the miniaturization design of the electronic device.

[0103] Based on this, the embodiment of the present application provides a lens assembly 1, which can improve the assembly accuracy of the lens assembly 1, while also reducing processing costs, improving structural strength, and reducing the overall size of the lens 20.

[0104] The lens assembly 1 can be applied to electronic devices, such as cameras, driving recorders, etc. In addition to the lens assembly 1, the electronic device can also include a housing, and the lens assembly 1 is fixed in the housing.

[0105] For the convenience of description, Figure 6aAs shown, two directions can be defined, namely a first direction (X direction) and a second direction (Y direction). The X direction represents the length direction of the lens assembly 1, and the Y direction represents the width direction of the lens assembly 1. The X direction and the Y direction are perpendicular to each other.

[0106] like Figure 6a As shown, the lens assembly 1 may include: a lens barrel 10 , at least two locking rings 40 and at least two lenses 20 .

[0107] like Figure 6a As shown, the lens barrel 10 includes a barrel portion 11 and a reference portion 12 disposed on the inner wall of the barrel portion 11 , and the reference portion 12 has at least two positioning references 121 arranged along the X direction. The at least two positioning references 121 may include a first positioning reference 122 and a second positioning reference 123 .

[0108] like Figure 6a As shown, at least two locking rings 40 are respectively fixed on the inner wall of the lens barrel 10 and arranged along the X direction. The at least two locking rings 40 include a first locking ring 41 and a second locking ring 42, and the first locking ring 41 and the second locking ring 42 are both fixed on the inner wall of the lens barrel 10, and the first locking ring 41 and the second locking ring 42 are arranged along the X direction. The first locking ring 41 and the second locking ring 42 are respectively located on both sides of the reference portion 12.

[0109] like Figure 6a As shown, at least two lenses 20 are fixed to the inner wall of the lens barrel 10. The first lens 22 of the at least two lenses 20 is fixed between the first positioning reference 122 and the first locking ring 41, so that the first positioning reference 122 can provide the first lens 22 with positioning along the X direction, that is, the first positioning reference 122 can provide the first lens 22 with positioning along the length direction of the lens barrel 10. And the first locking ring 41 can play a role in locking the first lens 22. The second lens 23 of the at least two lenses 20 is fixed between the second positioning reference 123 and the second locking ring 42, so that the second positioning reference 123 can provide the second lens 23 with positioning along the X direction, that is, the second positioning reference 123 can provide the second lens 23 with positioning along the length direction of the lens barrel 10. And the second locking ring 42 can play a role in locking the second lens 23.

[0110] In the process of assembling the lens assembly 1, after the lens barrel 10 and all the lenses 20 are manufactured, the first lens 22 can be loaded into the lens barrel 10, and the first lens 22 can be brought into contact with the first positioning reference 122, the first locking ring 41 can be loaded into the lens barrel 10 from one end of the first lens 22 that is away from the first positioning reference 122, and the first lens 22 can be locked to a fixed position in the lens barrel 10. The second lens 23 can also be loaded into the lens barrel 10, and the second lens 23 can be brought into contact with the second positioning reference 123, the second locking ring 42 can be loaded into the lens barrel 10 from one end of the second lens 23 that is away from the second positioning reference 123, and the second lens 23 can be locked to a fixed position in the lens barrel 10. Thus, the assembly of the lens assembly 1 is completed.

[0111] When the assembly error generated after the first lens 22 is installed on the lens barrel 10 and the assembly error generated after the second lens 23 is installed on the lens barrel 10 affect each other, it will lead to error accumulation, thereby causing the first lens 22 or the second lens 23 to tilt or shift in center, and the tilt amount is large and the shift amount is also large. Since in the embodiment of the present application, the first lens 22 is fixed between the first positioning reference 122 and the first locking ring 41, and the second lens 23 is fixed between the second positioning reference 123 and the second locking ring 42, the assembly error of the first lens 22 and the assembly error of the second lens 23 do not affect each other, and the first lens 22 or the second lens 23 will not have a large tilt or shift amount. In other words, the embodiment of the present application can improve the assembly accuracy of the lens assembly 1, thereby improving the production yield.

[0112] Moreover, if Figure 5 As shown, the lens 20 in the related art is provided with a shoulder structure 21. However, the embodiment of the present application adopts the above structure, which can achieve higher assembly accuracy, so there is no need to set the shoulder structure 21. When producing the lens 20, there is no need to add a shoulder adding process on the basis of the existing process, thereby reducing the processing cost of the lens 20. Moreover, there will be no problem of low assembly accuracy of the lens 20 and the lens barrel 10 due to the difficulty in ensuring the flatness of the shoulder structure 21. In addition, there will be no problem of the structural strength of the lens 20 being deteriorated due to the addition of the shoulder structure 21, and the problem of stress concentration being prone to cause the lens 20 to be fragile when subjected to force. Finally, there will be no problem of increasing the overall size of the lens 20 due to the addition of the shoulder structure 21, thereby increasing the overall size of the lens assembly 1.

[0113] Next, each component in the lens assembly 1 according to the embodiment of the present application is described in detail.

[0114] The barrel portion 11 includes at least two barrels 111 arranged and connected along the X direction. Figure 6aAs shown, in this embodiment, the barrel portion 11 includes two barrels 111. For ease of description, the two barrels 111 are respectively named as a first barrel 112 and a second barrel 113.

[0115] The material of the first barrel 112 may include plastic or metal, and the material of the second barrel 113 may include plastic or metal. Figure 7 As shown, the first barrel 112 and the second barrel 113 are connected to form an integral structure. The integral structure may refer to being manufactured by an integral molding method. Therefore, when the first barrel 112 and the second barrel 113 are connected to form an integral structure, the barrel portion 11 may be manufactured by a one-time molding method. For example, the barrel portion 11 may be manufactured by injection molding or the like. Alternatively, the barrel portion 11 may also be obtained by cutting and finishing a profile having a circular cross-sectional shape. In this way, the manufacturing process of the barrel portion 11 is relatively simple, and the assembly process of the lens assembly 1 is also relatively simple.

[0116] like Figure 7 As shown, the inner wall of the first cylinder 112 and the inner wall of the second cylinder 113 are both provided with internal threads 114. The internal threads 114 on the first cylinder 112 are located at one end of the first cylinder 112 away from the second cylinder 113. The internal threads 114 on the second cylinder 113 are located at one end of the second cylinder 113 away from the first cylinder 112.

[0117] like Figure 6a As shown, the reference portion 12 is an integrated structure. For example, the reference portion 12 can be a plate-shaped structure. The plate-shaped reference portion 12 can be fixed to the inner wall of the barrel 11, and the reference portion 12 is located in the middle position of the barrel 11 along the X direction.

[0118] The material of the reference portion 12 may be the same as or different from that of the barrel 11. With respect to the structure of the lens barrel 10 composed of the reference portion 12 and the barrel 11, in one possible implementation, when the material of the reference portion 12 is the same as that of the barrel 11, the lens barrel 10 may be manufactured in an integrated manner, such as by injection molding. In another possible implementation, when the material of the reference portion 12 is different from that of the barrel 11, the reference portion 12 and the barrel 11 may be manufactured separately, and then the reference portion 12 may be fixed to the inside of the barrel 11 by gluing or laser welding to form the lens barrel 10.

[0119] Moreover, if Figure 7 As shown, the reference portion 12 is provided with a through hole 124 extending along the X direction. The cross-sectional shape of the lens barrel 10 is annular. The through hole 124 provided on the reference portion 12 can be a circular hole, or a square hole, etc. When the through hole 124 is a circular hole, the cross-sectional shape of the reference portion 12 is also annular.

[0120] like Figure 7As shown, two surfaces on the reference part 12 that are separated from each other are respectively a first positioning reference 122 and a second positioning reference 123. Moreover, the first positioning reference 122 is in the shape of a circular ring, and the second positioning reference 123 is also in the shape of a circular ring.

[0121] like Figure 6a As shown, the first locking ring 41 is fixed in the first cylinder 112 , and an external thread 411 is provided on the outer surface of the first locking ring 41 . The first locking ring 41 can be fixed to the position where the internal thread 114 is provided on the inner wall of the first cylinder 112 by means of threaded connection.

[0122] like Figure 6a As shown, the second locking ring 42 is fixed in the second cylinder 113. The outer surface of the second locking ring 42 is provided with an external thread 411, and the second locking ring 42 can be fixed to the position where the internal thread 114 is provided on the inner wall of the second cylinder 113 by means of threaded connection.

[0123] like Figure 6a As shown, the first locking ring 41 and the second locking ring 42 are respectively located on both sides of the reference portion 12. A first installation space 125 can be formed between the first locking ring 41 and the first positioning reference 122. A second installation space 126 can be formed between the second locking ring 42 and the second positioning reference 123.

[0124] The lens assembly 1 may include at least two lenses 20, all mirror surfaces may include two convex surfaces, and the remaining mirror surfaces are concave surfaces or flat surfaces. Moreover, among the at least two lenses 20, one mirror surface of the first lens 22 is a convex surface, one mirror surface of the second lens 23 is a convex surface, and the first lens 22 and the second lens 23 are different lenses 20. For example, Figure 6a As shown, the lens assembly 1 includes six lenses 20, the mirror surface contacting the first positioning reference 122 and the mirror surface contacting the second locking ring 42 are convex surfaces, and the remaining mirror surfaces are flat surfaces.

[0125] like Figure 6aAs shown, the first lens 22 can be fixed in the first installation space 125 formed between the first locking ring 41 and the first positioning reference 122. The first lens 22 is fixed between the reference part 12 and the first locking ring 41, and the surface of the reference part 12 that contacts the first lens 22 is the first positioning reference 122. When the mirror surface of the first lens 22 that contacts the first positioning reference 122 is a concave surface, the surface of the concave surface away from the center contacts the first positioning reference 122; when the mirror surface of the first lens 22 that contacts the first positioning reference 122 is a convex surface, the contact mode of the convex surface with the first positioning reference 122 is a line contact. It can be seen that the first lens 22 contacts part of the surface of the first positioning reference 122. After the through hole 124 is set on the reference part 12, the first lens 22 can contact the first positioning reference 122 in a circular shape, and the reference part 12 and the first locking ring 41 can achieve the fixing effect of the first lens 22. Moreover, the provision of the through hole 124 can also reduce the weight of the reference portion 12 , thereby reducing the weight of the lens assembly 1 , so as to achieve a lightweight design of the lens assembly 1 .

[0126] Regarding the number of lenses 20 fixed in the first installation space 125, in a possible implementation manner, as shown in FIG. Figure 6b As shown, the number of lenses 20 fixed in the first installation space 125 is one, that is, the first lens 22. One of the mirror surfaces of the first lens 22 is a convex surface, and the other mirror surface is a flat surface. The flat surface of the first lens 22 can contact the first positioning reference 122, and the convex surface of the first lens 22 can contact the first locking ring 41. In other embodiments, the other mirror surface of the first lens 22 can be a concave surface.

[0127] In another possible implementation, Figure 6a As shown, the number of lenses 20 fixed in the first installation space 125 is multiple, that is, the lenses 20 fixed in the first installation space 125 may include other lenses 20 in addition to the first lens 22, such as two third lenses 24, and both mirror surfaces of the third lenses 24 are planes. In other embodiments, both mirror surfaces of the third lens 24 may also be concave; or, one mirror surface of the third lens 24 is a concave surface, and the other mirror surface is a plane. In this way, there is only one line contact in the first installation space 125, thereby reducing the situation of error accumulation.

[0128] The second lens 23 can be fixed in the second installation space 126 formed between the second locking ring 42 and the second positioning reference 123. Regarding the number of lenses 20 fixed in the second installation space 126, in a possible implementation manner, as shown in FIG. Figure 6bAs shown, the number of lenses 20 fixed in the second installation space 126 is one, that is, the second lens 23. One of the mirror surfaces of the second lens 23 is a convex surface, and the other mirror surface is a flat surface. And the convex surface of the second lens 23 can contact the second positioning reference 123. In other embodiments, the other mirror surface of the second lens 23 can be a concave surface. And the convex surface of the second lens 23 can also contact the second locking ring 42.

[0129] In another possible implementation, Figure 6a As shown, the number of lenses 20 fixed in the second installation space 126 is multiple, that is, the lenses 20 fixed in the second installation space 126 may include other lenses 20 in addition to the second lens 23, such as two fourth lenses 25, and both mirror surfaces of the fourth lenses 25 are planes. In other embodiments, both mirror surfaces of the fourth lens 25 may also be concave; or, one mirror surface of the fourth lens 25 is a concave surface, and the other mirror surface is a plane. In this way, there is only one line contact in the second installation space 126, thereby reducing the situation of error accumulation.

[0130] In other embodiments, the number of lenses 20 fixed in the first installation space 125 can be one, and the number of lenses 20 fixed in the second installation space 126 can be multiple; or, the number of lenses 20 fixed in the first installation space 125 can be multiple, and the number of lenses 20 fixed in the second installation space 126 can be one.

[0131] It is understandable that the number of lenses 20 fixed in the first installation space 125 and the second installation space 126 is determined according to the structure and arrangement of each lens 20 in the lens assembly 1, as long as there is only one line contact in the first installation space 125 and the second installation space 126 respectively. Figure 2a As shown, when there are a large number of line contacts in the lens assembly 1, each line contact can be arranged in each installation space respectively, or some of the line contacts can be arranged in one installation space, thereby reducing the error accumulation to a certain extent.

[0132] Moreover, if Figure 6a As shown, when there are multiple lenses 20 fixed in the first installation space 125 , a spacer 30 may be fixed between two adjacent lenses 20 so that there is a distance between the two adjacent lenses 20 .

[0133] In other embodiments of the present application, Figure 8a and Figure 8b As shown, Figure 6a The difference between the illustrated embodiments is that the structure of the lens barrel 10 is different.

[0134] In such Figure 6a In the embodiment shown, the first cylinder 112 and the second cylinder 113 are connected to form an integral structure. Figure 8a and Figure 8b As shown, the first barrel 112 (i.e., the third barrel) and the second barrel 113 (i.e., the fourth barrel) are connected to form a split structure. The first barrel 112 and the second barrel 113 are connected to form a split structure, which means that when manufacturing the barrel portion 11, the first barrel 112 and the second barrel 113 are first manufactured separately, and then the first barrel 112 and the second barrel 113 are connected by gluing, laser welding or other connecting parts to form the barrel portion 11.

[0135] In such Figure 6a In the embodiment shown, the reference portion 12 is an integrated structure. Figure 8a and Figure 8b As shown, the reference part 12 is a split structure. Exemplarily, the reference part 12 includes at least two bosses 127 arranged along the X direction. The number of bosses 127 is the same as the number of cylinders 111. Exemplarily, as Figure 8a As shown, when the barrel 11 includes the first barrel 112 and the second barrel 113, the reference portion 12 includes two bosses 127. For ease of description, the two bosses 127 can be respectively named as the first boss 1271 and the second boss 1272. The cross-sectional shape of the first boss 1271 and the second boss 1272 can both be circular.

[0136] like Figure 8a and Figure 8b As shown, the first boss 1271, the first locking ring 41 and the first lens 22 are all fixed in the first barrel 112, and the first lens 22 is located between the first boss 1271 and the first locking ring 41. The surface of the first boss 1271 facing the first locking ring 41 is the first positioning reference 122, and the first lens 22 contacts the first positioning reference 122.

[0137] like Figure 8a and Figure 8b As shown, the second boss 1272, the second locking ring 42 and the second lens 23 are all fixed in the second barrel 113, and the second lens 23 is located between the second boss 1272 and the second locking ring 42. The surface of the second boss 1272 facing the second locking ring 42 is the second positioning reference 123, and the second lens 23 contacts the second positioning reference 123. In this way, during the use of the lens assembly 1, if the first barrel 112 is damaged but the second barrel 113 is not damaged, only the first barrel 112 can be replaced, thereby reducing the maintenance cost of the lens assembly 1.

[0138] exist Figure 8aIn the illustrated embodiment, the first locking ring 41 is fixed to one end of the first cylinder 112 facing the second cylinder 113, and the second locking ring 42 is fixed to one end of the second cylinder 113 facing the first cylinder 112. Figure 8b In the illustrated embodiment, the first locking ring 41 is fixed to one end of the first cylinder 112 facing the second cylinder 113 , and the second locking ring 42 is fixed to one end of the second cylinder 113 facing the first cylinder 112 .

[0139] In other embodiments of the present application, Fig. 9 As shown, Figure 8a The difference between the illustrated embodiments is that the structure of the lens barrel 10 is different. Fig. 9 The embodiment shown in Figure 8a The first convex portion 13 and the second convex portion 14 are added on the basis of the embodiment shown in the figure. That is, the lens barrel 10 may further include the first convex portion 13 and the second convex portion 14 in addition to the barrel portion 11 and the reference portion 12. Among them, the first convex portion 13 is fixed to the outer wall of the first barrel 112, and the first convex portion 13 is located at one end of the first barrel 112 facing the second barrel 113. The second convex portion 14 is fixed to the outer wall of the second barrel 113, and the second convex portion 14 is located at one end of the second barrel 113 facing the first barrel 112. The first convex portion 13 abuts against the second convex portion 14.

[0140] When the first barrel 112 and the second barrel 113 are connected, the first convex portion 13 and the second convex portion 14 can be connected by gluing or laser welding, and the contacting surfaces of the first barrel 112 and the second barrel 113 can be connected by gluing or laser welding, so as to realize the connection between the first barrel 112 and the second barrel 113. In this way, the connection area between the first barrel 112 and the second barrel 113 can be increased, so that the connection strength between the first barrel 112 and the second barrel 113 can be improved.

[0141] In other embodiments of the present application, Fig.10 As shown, Figure 8a The difference between the illustrated embodiments is that the structure of the lens barrel 10 is different. Fig.10 The lens barrel 10 in the illustrated embodiment is Figure 8a The lens barrel 10 in the embodiment shown in the figure is supplemented with a first connecting portion 15. That is, in the embodiment, the lens barrel 10 includes a barrel portion 11, a reference portion 12 and a first connecting portion 15.

[0142] like Fig.10As shown, the first connecting portion 15 is provided on the outer wall of the first barrel 112 and the second barrel 113. That is, the first part of the first connecting portion 15 is provided on the outer wall of the first barrel 112, and the second part of the first connecting portion 15 is provided on the outer wall of the second barrel 113. In this way, the distance between the first barrel 112 and the second barrel 113 can be adjusted by adjusting the connection position of the first connecting portion 15 on the outer wall of the first barrel 112 and adjusting the connection position of the first connecting portion 15 on the outer wall of the second barrel 113. The first lens 22 can be located in the first barrel 112, and the second lens 23 can be located in the second barrel 113, and the spacing error between the first lens 22 and the second lens 23 can be adjusted so that the spacing error meets the error requirement.

[0143] Moreover, the first connecting portion 15 is provided on the outer wall of the first barrel 112 and the second barrel 113 in a threaded connection manner. That is, the first part of the first connecting portion 15 is provided on the outer wall of the first barrel 112 in a threaded connection manner, and the second part of the first connecting portion 15 is provided on the outer wall of the second barrel 113 in a threaded connection manner. In the process of assembling the lens assembly 1, the spacing error between the first barrel 112 and the second barrel 113 can be adjusted by adjusting the length of the first barrel 112 screwed into the first connecting portion 15, or adjusting the length of the second barrel 113 screwed into the first connecting portion 15, thereby making the adjustment process of the spacing error between the first barrel 112 and the second barrel 113 simpler.

[0144] In this embodiment, if Fig.10 As shown, the first connection part 15 is an integrated structure. It can be said that the first connection part 15 is made of an integrated structure, for example, the first connection part 15 is made by injection molding. In this way, the structure of the first connection part 15 is relatively simple and easy to manufacture.

[0145] In other embodiments of the present application, Fig.11 As shown, Fig.10 The difference between the illustrated embodiments is that the structure of the first connecting portion 15 is different. Fig.10 In the embodiment shown, the first connecting portion 15 is an integrated structure. Fig.11 As shown, the first connecting portion 15 is a split structure.

[0146] like Fig.11As shown, the first connecting portion 15 includes a first connecting body 151 and a second connecting body 152 arranged and connected along the X direction, and the opposite surfaces of the first connecting body 151 and the second connecting body 152 are in contact and connected. The first connecting body 151 is connected to the outer wall of the first barrel 112, and the second connecting body 152 is connected to the outer wall of the second barrel 113. The first connecting body 151 and the second connecting body 152 can be connected by gluing or laser welding. Since the first connecting portion 15 is a split structure, the spacing error between the first barrel 112 and the second barrel 113 can be adjusted by adjusting the connection position of the first barrel 112 on the first connecting body 151 and adjusting the connection position of the second barrel 113 on the second connecting body 152, thereby adjusting the spacing error between the first lens 22 and the second lens 23. The position of the first connecting body 151 on the second connecting body 152 can also be adjusted along the Y direction and the Z direction to adjust the center offset error between the first lens 22 and the second lens 23. It can be seen that in this embodiment, not only the spacing error between the first lens 22 and the second lens 23 can be adjusted, but also the center offset error between the first lens 22 and the second lens 23 can be adjusted from the Y direction and the Z direction respectively.

[0147] In other embodiments of the present application, Fig.12a As shown, Figure 6a The differences between the illustrated embodiments are the number of lenses 20 with convex mirror surfaces and the structure of the lens barrel 10 .

[0148] In this embodiment, if Fig.12a As shown, the number of lenses 20 with convex mirror surfaces is at least three, and the number of barrels 111 in the lens barrel 10 is also at least three. The lens assembly 1 can be assembled automatically with high precision by using the lens group coupling technology. Fig.12a As shown, the number of lenses 20 with convex mirror surfaces and the number of barrels 111 in the lens barrel 10 are both three. In other embodiments, when the number of lenses 20 with convex mirror surfaces is four, the number of barrels 111 in the lens barrel 10 may also be four.

[0149] Among the at least three cylinders 111, some adjacent two cylinders 111 are connected to form an integrated structure, and some adjacent two cylinders 111 are connected to form a split structure. Fig.12a As shown, for ease of description, the three barrels 111 may be named as the first barrel 112, the second barrel 113 and the third barrel 115. The first barrel 112, the second barrel 113 and the third barrel 115 are arranged in sequence along the X direction. The first barrel 112 and the second barrel 113 are connected as an integrated structure, and the third barrel 115 and the second barrel 113 are connected as a split structure.

[0150] The first connection part 15 is connected between the cylinder 111 connected as an integral structure and the cylinder 111 connected as a split structure. That is, in this embodiment, the first connection part 15 is connected between the second cylinder 113 and the third cylinder 115. And the first connection part 15 is an integral structure. In other embodiments, such as Figure 12b As shown, the first connecting portion 15 is a split structure.

[0151] When there are multiple first connection parts 15, all of the multiple first connection parts 15 are integral structures; or, all of the multiple first connection parts 15 are split structures; or, some of the multiple first connection parts 15 are integral structures, and the rest of the first connection parts 15 are split structures.

[0152] In other embodiments of the present application, Fig.12a The difference between the embodiments shown is that the structure of the lens barrel 10 is different. Fig.13a As shown, at least three barrels 111 are connected to form a split structure. In this way, each barrel 111 can be replaced individually when damaged, thereby reducing the maintenance cost of the lens assembly 1.

[0153] Each of the two cylinders 111 connected in a split structure is connected to a first connection portion 15. With respect to the structure of the first connection portion 15, in a possible implementation, part of the first connection portion 15 is an integrated structure, and part of the first connection portion 15 is a split structure. Fig.13a As shown, the first connecting portion 15 fixed to the outer wall of the first barrel 112 and the second barrel 113 is a split structure, and the first connecting portion 15 fixed to the outer wall of the second barrel 113 and the third barrel 115 is an integrated structure. In this way, when assembling the lens assembly 1, if the center offset error between the lenses 20 in the two barrels 111 meets the center offset error requirement, the outer walls of the two barrels 111 can be connected to the first connecting portion 15 of the integrated structure; if the center offset error between the lenses 20 in the two barrels 111 exceeds the center offset error requirement, the outer walls of the two barrels 111 can be connected to the first connecting portion 15 of the split structure. In this way, the assembly accuracy of the lens assembly 1 can meet the assembly accuracy requirement, and the structure of the lens assembly 1 can be simplified to a certain extent.

[0154] In another possible implementation, Fig.13b As shown, each first connection part 15 is an integrated structure. Thus, the structure of each first connection part 15 is relatively simple, and the assembly between the first connection part 15 and the cylinder 111 is relatively simple.

[0155] In another possible implementation, Fig.13cAs shown, each first connecting portion 15 is a split structure. In this way, the lens spacing error between the lenses 20 fixed inside different barrels 111 can be adjusted, and the center offset error of the lenses 20 fixed inside different barrels 111 can also be adjusted. As a result, the assembly accuracy of the lens assembly 1 is high.

[0156] against Figure 2a In the related art shown, the lens assembly 1 has a low assembly error, such as Fig.14a As shown, the embodiment of the present application further provides a lens assembly 1, which may include: a lens barrel 10, a spacer 30, a ring 50 and at least two lenses 20.

[0157] like Fig.14a As shown, the lens barrel 10 includes a barrel portion 11 and a reference portion 12 fixed to the inner wall of the barrel portion 11. The reference portion 12 is fixed to the first end 116 of the lens barrel 10, and the surface of the reference portion 12 facing the second end 117 of the lens barrel 10 is a positioning reference 121. The material of the lens barrel 10 can include material or metal, and the lens barrel 10 can provide protection and support for the ring 50 and at least two lenses 20 fixed therein.

[0158] like Fig.14a As shown, in this embodiment, the positioning reference 121 is provided with a through hole 124. In other embodiments, the positioning reference 121 may not be provided with the through hole 124.

[0159] The number of the lenses 20 is at least two, for example, the number of the lenses 20 can be two, three or more. At least two lenses 20 are arranged along the X direction. At least two lenses 20 are located inside the lens barrel 10. The mirror surface of one of the lenses 20 contacts the positioning reference 121.

[0160] Any lens 20 may be a spherical lens 20 or an aspherical lens 20 , and the spherical lens 20 may be a meniscus lens 20 , a biconvex lens 20 , a biconcave lens 20 , a plano-convex lens 20 or a plano-concave lens 20 . Fig.14a In the lens assembly 1 shown, each lens 20 is a biconvex lens 20 . Fig.14b In the lens assembly 1 shown, three lenses 20 are biconvex lenses 20 , and the other two lenses 20 are aspherical lenses 20 .

[0161] Regarding the material of the lens 20, in a possible implementation, the material of each lens 20 includes glass. When the diameter of the lens 20 is large, the material of the lens 20 may include glass, which is convenient for processing.

[0162] In another possible implementation, the material of each lens 20 includes plastic. When the aperture of the lens 20 is relatively small, the material of each lens 20 may include plastic. The plastic may be optical grade plastic. Since the manufacturing cost of the mold used to make the plastic lens 20 can be reduced by more than 70% compared to the cost used to make the glass lens 20, the processing cost can be reduced.

[0163] Next, the performance of optical grade plastics and ordinary plastics is compared. The comparison results are shown in Table 1.

[0164] Table 1

[0165]

[0166] As can be seen from Table 1, the high temperature resistance of optical grade plastics is greater than that of ordinary plastics. The bending elasticity of most optical grade plastics is greater than that of ordinary plastics. The greater the bending elasticity, the easier it is to install.

[0167] In addition, when the material of each lens 20 includes plastic, each lens 20 can have high processing accuracy, low water absorption, high temperature resistance, high consistency, and is suitable for mass and automated production, thereby reducing processing costs. In addition, the shape of the lens 20 can be made to have a high degree of freedom, and an aspherical surface can be processed and has aspherical characteristics, so that one lens 20 can achieve multiple functions, thereby reducing the number of lenses 20 and further reducing the volume of the lens assembly 1.

[0168] In another possible implementation, the material of a portion of the lenses 20 includes glass, and the material of another portion of the lenses 20 includes plastic. For example, for lenses 20 with a larger diameter, the material may include glass; for lenses 20 with a smaller diameter, the material may include plastic, thereby reducing the processing cost of the lens assembly 1 to a certain extent. In this way, the material selection of each lens 20 can be comprehensively determined based on the diameter of the lens 20 and the volume of the lens assembly 1.

[0169] like Fig.14a As shown, the collar 50 is fixed to the inner wall of the lens barrel 10. The outer surface of the collar 50 fits with the inner wall of the lens barrel 10 and has an interference fit. That is, the cross-sectional shape of the inner wall of the lens barrel 10 is usually circular, and the outer surface of the cross section of the collar 50 is circular, then the diameter of the outer surface of the collar 50 is slightly larger than the diameter of the inner wall of the lens barrel 10.

[0170] In this embodiment, part of the at least two lenses 20 are fixed to the inner wall of the collar 50, and the remaining part of the lenses 20 are fixed to the inner wall of the lens barrel 10 and in contact with the inner wall of the lens barrel 10. In other words, part of the lenses 20 are fixed to the inner wall of the lens barrel 10 through the collar 50, and the remaining part of the lenses 20 are directly fixed to the inner wall of the lens barrel 10. For example, Fig.14a As shown, the lens assembly 1 includes six lenses 20, three of which are fixed to the inner wall of the collar 50; the remaining three lenses 20 are fixed to the inner wall of the lens barrel 10 and contact the inner wall of the lens barrel 10. In practical applications, the materials of different lenses 20 may be different, so the lens 20 with lower processing accuracy can be fixed to the inner wall of the collar 50, and the lens 20 with higher processing accuracy can be fixed to the inner wall of the lens barrel 10. In addition, each lens 20 and the collar 50 can also be interference fit.

[0171] Next, the assembly accuracy of lens assemblies 1 with different structures is compared. The comparison results are shown in Table 2.

[0172] Table 2

[0173]

[0174] In Table 2, "stacked" may refer to the lens being fixed to the inner wall of the lens barrel. "Embedded" may refer to the lens being fixed to the inner wall of the lens barrel in an embedded manner, that is, the diameter of the position where the lens is fixed on the inner wall of the lens barrel is smaller than the diameter of the position where the lens is not fixed.

[0175] Table 2 shows the relationship between the parameters after over-tightening and over-pressuring after assembly and the parameters before assembly. Before assembly refers to assembling and pre-tightening the components in the lens assembly 1. After assembly refers to the state of over-tightening and over-pressuring after pre-tightening.

[0176] It can also be seen from Table 2 that for the lens assembly 1 with a glass lens 20 and no collar 50 structure, the change in peak to valley value (PV) is 1μm, the change in auto scaling (AS) is 1μm, and the change in eccentricity (DC) is 1μm. For the lens assembly 1 with a plastic lens 20 and no collar 50 structure, the change in PV is 2μm, the change in AS is 0.7μm, and the change in DC is 1μm. For the lens assembly 1 with a plastic lens 20 and a collar 50 structure, the change in PV is 0.5μm, the change in AS is 0.2μm, and the change in DC is 0. By comparison, it can be seen that when the collar 50 is added, the changes in PV, AS and DC are all small. This can reduce the stress concentration generated during the assembly process, thereby reducing the reliability risk.

[0177] In the embodiment of the present application, by adding a ring 50 between the lens barrel 10 and part of the lens 20, when the ring 50 is made of a material with high processing accuracy, the error between the center line of the ring 50 and the center line of the inner wall of the lens barrel 10 can be made smaller, thereby making it possible to reduce the error between the center line of the lens 20 fixed to the inner wall of the ring 50 and the center line of the inner wall of the lens barrel 10. This can reduce the center offset error of the lens 20 in the lens assembly 1, thereby improving the assembly accuracy of the lens assembly 1.

[0178] Moreover, when the apertures of each lens 20 are the same, Fig.14a As shown, the dimension L1 of the collar 50 along the X direction is smaller than the distance L2 between the second end 117 of the lens barrel 10 and the positioning reference 121. The collar 50 is fixed to the inner wall of the lens barrel 10 in a nested manner. That is, the diameter of the inner wall of the lens barrel 10 where the collar 50 is fixed is larger than the diameter of the inner wall in contact with the lens 20, and the inner wall diameter of the collar 50 is the same as the diameter of the inner wall in contact with the lens 20 on the lens barrel 10.

[0179] In this embodiment, the material of the collar 50 may include plastic. Specifically, it may include optical grade plastic material, and the processing accuracy of such material can be up to 0.1 μm, that is, the processing accuracy of such material is between 0.1 μm and 0.9 μm. This can further improve the processing accuracy of the collar 50, thereby further improving the assembly accuracy of the lens assembly 1.

[0180] In addition, during the use of the lens assembly 1, the lens 20 and the collar 50 will both generate heat, and the thermal characteristics of the lens 20 and the collar 50 will be affected. For example, the optical parameters of the lens 20, such as the refractive index, the aperture of the lens 20, the center thickness of the lens 20, the interval between adjacent lenses 20, etc., will change with temperature. The parameters such as the outer diameter, inner diameter and length of the cross section of the collar 50 will also change with temperature. When the material of the lens 20 is different from the material of the collar 50, this will cause the change in the optical parameters of the lens 20 to be different from the change in the parameters of the collar 50. And when the difference between the thermal expansion coefficient of the material of the lens 20 and the thermal expansion coefficient of the material of the collar 50 is large, the image plane of the lens assembly 1 will drift, that is, a temperature drift problem will occur. When the material of the collar 50 includes plastic, since the processing accuracy of plastic is high, the temperature drift problem can be considered in the design stage by adjusting the optical parameters of the lens 20 or the parameters of the collar 50, thereby improving the temperature drift problem.

[0181] Moreover, regarding the material selection of the lens 20 and the collar 50, in a possible embodiment, the material of the lens 20 is the same as that of the collar 50. That is, when the material of the collar 50 includes plastic, the material of the lens 20 may also include plastic. In this way, the lens 20 and the collar 50 may be assembled in a snap-fitting, advanced matching, hybrid, and other assembly methods, and the sealing of the lens assembly 1 can also be improved. When the material of the lens 20 is the same as that of the collar 50, the variation of the optical parameters of the lens 20 is relatively close to the variation of the parameters of the collar 50, so that the image plane of the lens assembly 1 does not drift or the drift is small, which meets the drift requirement. In other words, this embodiment can improve the temperature drift problem. Moreover, after the structure and parameter design of the lens assembly 1 is completed, a simulation experiment can be performed on the lens assembly 1 to test the influence of temperature drift on the performance of the lens assembly 1, so as to improve the temperature drift problem by correcting various parameters in the design stage. In addition, when the material of the lens 20 is the same as that of the ring 50, when the lens assembly 1 is in use, the stress concentration point after the lens 20 generates thermal expansion will be transferred to the ring 50, and the ring 50 can play a buffering role for the lens 20, thereby effectively improving the problems of extrusion deformation and tilt of the lens 20. Exemplarily, the ring 50 can reduce the DC, PV, and AS values ​​by more than 50%.

[0182] In a specific implementation, the material of each lens 20 is the same as the material of the collar 50. Alternatively, the material of some lenses 20 is the same as the material of the collar 50, and the material of other lenses 20 is different from the material of the collar 50. For example, the material of the lens 20 fixed to the inner wall of the collar 50 is the same as the material of the collar 50, and the material of the lens 20 in contact with the inner wall of the lens barrel 10 is different from the material of the collar 50.

[0183] It is understandable that, in order to further improve the assembly accuracy of the lens assembly 1, the material of the lens barrel 10 may also include plastic. When the lens assembly 1 further includes a lock ring 40 in which a gasket is fixed to the lens 20 of the at least two lenses 20 that is away from the positioning reference 121, the material of the gasket and the lock ring 40 may also include plastic.

[0184] In another possible implementation, the material of the lens 20 is different from the material of the collar 50, but the thermal expansion coefficients are the same or similar. Similar thermal expansion coefficients may refer to the difference between the thermal expansion coefficients of the two materials being less than 10. In this way, during the use of the lens assembly 1, the change in the optical parameters of the lens 20 is relatively close to the change in the parameters of the collar 50, so that the image plane of the lens assembly 1 does not drift or the drift is small, meeting the drift requirement.

[0185] In a specific implementation, the material of each lens 20 is different from the material of the ring 50, and the thermal expansion coefficient of each lens 20 is the same or similar to the thermal expansion coefficient of the ring 50. Alternatively, the thermal expansion coefficient of some lenses 20 is the same or similar to the thermal expansion coefficient of the ring 50, and the thermal expansion coefficient of another part of the lenses 20 is significantly different from the thermal expansion coefficient of the ring 50.

[0186] like Fig.14a As shown, the spacer 30 may be located inside the lens barrel 10. Moreover, when a spacing is required between two adjacent lenses 20, the spacer 30 may be fixed between the two lenses 20. When the two adjacent lenses 20 need to be in contact with each other, the spacer 30 does not need to be fixed between the two lenses 20. For example, Fig.14b As shown, the two lenses 20 away from the reference portion 12 are in contact with each other, but the spacer 30 is not fixed between the two lenses 20 .

[0187] When two adjacent lenses 20 are fixed on the inner wall of the ring 50, the spacer 30 between the two lenses 20 is fixed to the inner wall of the ring 50; when two adjacent lenses 20 are in contact with the inner wall of the lens barrel 10, the spacer 30 between the two lenses 20 is directly fixed to the inner wall of the lens barrel 10.

[0188] Furthermore, when there are two lenses 20 located inside the same ring body 51, the number of the spacer 30 located inside the ring body 51 can be one, and the spacer 30 can be fixed between the two lenses 20; when there are more than two lenses 20 located inside the same ring body 51, and there is a distance between every two lenses 20, the number of the rings 50 can be at least two. Fig.14a As shown, the number of spacers 30 may be one less than the number of lenses 20 .

[0189] For the spacer 30 fixed in the collar 50, the outer wall of the spacer 30 may contact the inner wall of the collar 50, or there may be a gap between the outer wall of the spacer 30 and the inner wall of the collar 50. For the spacer 30 contacting the inner wall of the lens barrel 10, the outer wall of the spacer 30 may contact the inner wall of the lens barrel 10, or there may be a gap between the outer wall of the spacer 30 and the inner wall of the lens barrel 10.

[0190] When assembling the lens assembly 1, the lenses 20 and the spacers 30 can be installed into the ring body 51 in a specific order, and then the ring body 51 with the lenses 20 and the spacers 30 can be fixed in the lens barrel 10 to realize the assembly of the lens assembly 1. By providing the spacers 30, the spacing requirement between two adjacent lenses 20 can be met.

[0191] In other embodiments of the present application, Fig.15 As shown, Fig.14aThe difference between the embodiments shown is that the structure of the collar 50 and the connection relationship between the lens 20, the collar 50 and the lens barrel 10 are different. Fig.14a In the embodiment shown, the dimension L1 of the collar 50 along the X direction is smaller than the distance L2 between the second end 117 of the lens barrel 10 and the positioning reference 121. Fig.14a In the embodiment shown, part of the lens 20 is fixed to the inner wall of the ring 50, and the remaining part of the lens 20 is in contact with the interior of the barrel 11. Fig.15 As shown, the dimension L1 of the collar 50 along the X direction is the same as the distance L2 between the second end 117 of the lens barrel 10 and the positioning reference 121. Moreover, each lens 20 is fixed to the inner wall of the collar 50. In this way, the center offset error of each lens 20 can be ensured to be small.

[0192] It is understandable that in other embodiments, the dimension L1 of the ring 50 along the X direction may also be smaller than the distance L2 between the second end 117 of the lens barrel 10 and the positioning reference 121 , as long as each lens 20 is fixed to the inner wall of the ring 50 .

[0193] like Fig.15 As shown, the collar 50 includes at least two ring bodies 51 arranged along the X direction. When the length of the collar 50 is too long, and a plurality of lenses 20 are fixed in one collar 50, the lens 20 located in the middle of the collar 50 is not easy to assemble due to the interference fit between the lens 20 and the collar 50. Therefore, when the collar 50 includes at least two ring bodies 51, the length of each ring body 51 is relatively short, thereby making it easy to assemble the lens 20 and the ring body 51. In addition, the assembly accuracy of the lens 20 and the ring body 51 can be improved.

[0194] Moreover, if Fig.15 As shown, the number of the ring bodies 51 is less than the number of the lenses 20. In this case, some of the lenses 20 in at least two lenses 20 are fixed to the inner wall of the first ring body 51 in at least two ring bodies 51, and some of the lenses 20 in at least two lenses 20 are fixed to the inner wall of the second ring body 51 in at least two ring bodies 51. When the number of the ring bodies 51 is two and the number of the lenses 20 is more than two, one lens 20 is fixed to the inner wall of the first ring body 51, and a plurality of lenses 20 are fixed to the inner wall of the second ring body 51; or, a plurality of lenses 20 are fixed to the inner wall of the first ring body 51, and one lens 20 is fixed to the inner wall of the second ring body 51; or, a plurality of lenses 20 are fixed to the inner wall of the first ring body 51, and a plurality of lenses 20 are fixed to the inner wall of the second ring body 51. In this way, when the processing accuracy of each ring body 51 is high, it can be ensured that the center offset error of each lens 20 meets the center offset error requirement.

[0195] like Fig.15As shown, there is no gap between two adjacent ring bodies 51, that is, the two adjacent ring bodies 51 are in contact with each other. In this way, when the two adjacent ring bodies 51 are assembled on the inner wall of the lens barrel 10, one of the ring bodies 51 can be used to position the other ring body 51 in the X direction, so that the assembly of the ring bodies 51 is more convenient.

[0196] Moreover, if Fig.15 As shown, the surface connecting two adjacent ring bodies 51 is a step surface 52. That is, in the two adjacent ring bodies 51, the surface of the first ring body 511 facing the second ring body 512 is a step surface 52, and the surface of the second ring body 512 facing the first ring body 511 is also a step surface 52. The two adjacent ring bodies 51 can be connected by gluing or laser welding. When the surface connecting two adjacent ring bodies 51 is a step surface 52, the two ring bodies 51 can be connected not only by the surface perpendicular to the X direction, but also by the surface parallel to the X direction, thereby increasing the connection area of ​​the two ring bodies 51, thereby improving the connection strength of the two ring bodies 51.

[0197] In other embodiments of the present application, Fig.16 As shown, Fig.15 The differences between the illustrated embodiments lie in the structure of the collar 50 and the fixing position of the spacer 30 .

[0198] In this embodiment, if Fig.16 As shown, the number of the ring bodies 51 is the same as the number of the lenses 20. In this case, each lens 20 is respectively fixed to the inner wall of each ring body 51. In this way, when the processing accuracy of each ring body 51 is high, it can be ensured that the center offset error of each lens 20 meets the center offset error requirement.

[0199] Moreover, if Fig.16 As shown, there is a spacing between two adjacent ring bodies 51. In this case, the size of the ring body 51 along the X direction can be the same as the size of the mounting surface of the lens 20 and the ring body 51 along the X direction. Then, the spacing between two adjacent ring bodies 51 is the same as the spacing between two adjacent lenses 20. In this way, the size of the collar 50 along the X direction can be reduced, thereby reducing the volume of the collar 50, and further reducing the cost of the lens assembly 1. In other embodiments, two adjacent ring bodies 51 are in contact with each other.

[0200] The spacer 30 (i.e., the second spacer) is fixed between two adjacent ring bodies 51. Since two adjacent lenses 20 are respectively fixed inside two adjacent ring bodies 51, when the spacer 30 is fixed between two adjacent ring bodies 51, the spacer 30 plays a role of separating the two adjacent ring bodies 51 and also plays a role of separating the two adjacent lenses 20. Therefore, by setting the spacer 30, the spacing requirement between two adjacent lenses 20 can be met.

[0201] Moreover, in a possible implementation, the surface of the spacer 30 facing the ring body 51 covers a portion of the surface of the ring body 51 facing the spacer 30, and covers a portion of the surface of the lens 20. Since the second spacer 30 can usually be made of plastic or plastic, when the surface of the spacer 30 also covers a portion of the surface of the lens 20, it can also absorb stray light emitted from the edge of the lens 20, thereby improving the performance of the lens assembly 1. In another possible implementation, such as Fig.16 As shown, the surface of the spacer 30 facing the ring body 51 coincides with the surface of the ring body 51 facing the spacer 30 .

[0202] Understandably, Fig.14a , Fig.14b , Fig.15 and Fig.16 The embodiments shown in the figure are schematic diagrams of the connection structure between the lens 20, the spacer 30, the lock ring 40 and the collar 50 in the lens assembly 1 when the lens barrel 10 includes a barrel 111. In other embodiments of the present application, the lens barrel 10 in the lens assembly 1 includes at least two barrels 111, for example, Fig.17a As shown, the lens barrel 10 includes two barrels 111. In a possible implementation, a collar 50 is disposed in one of the barrels 111, and no collar 50 is disposed in the other barrel 111. Exemplarily, the number of the collar 50 may be one, such as Fig.17a As shown, the collar 50 can be fixed to the inner wall of the second cylinder 113; or, as Fig.17b As shown, the collar 50 can be fixed to the inner wall of the first cylinder 112. Fig.17a As shown, when the collar 50 is fixed to the inner wall of the second barrel 113, among the lenses 20 located in the second barrel 113, the second lens 23 and a fourth lens 25 are fixed to the inner wall of the collar 50. Another fourth lens 25 is fixed to the inner wall of the second barrel 113, and the fourth lens 25 contacts the inner wall of the second barrel 113.

[0203] In another possible implementation, Fig.17c As shown, a collar 50 is disposed inside each of the first cylinder 112 and the second cylinder 113 .

[0204] It is understood that in this embodiment, the sleeve 50 provided in the cylinder 111 is Fig.14a The ring 50 in the lens assembly shown in FIG. In other embodiments, the ring 50 may also be Fig.15 or Fig.16 The collar 50 is shown in the lens assembly.

[0205] Moreover, if Fig.17c As shown, the structures of the collar 50 located in the first barrel 112 and the second barrel 113 may be the same. In other embodiments, the structures of the collar 50 located in the first barrel 112 and the collar located in the second barrel 113 may also be different.

[0206] It can also be understood that in this embodiment, the lens barrel 10 in the lens assembly 1 is Figure 6a The lens barrel 10 of the lens assembly 1 shown in FIG. 1 may also be configured as Figure 8a , Figure 8b , Fig. 9 , Fig.10 , Fig.11 , Fig.12a , Figure 12b , Fig.13a , Fig.13b or Fig.13c The lens barrel 10 in the embodiment.

[0207] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A lens assembly, characterized in that: include: A lens barrel, the lens barrel comprising a barrel portion and a reference portion provided on an inner wall of the barrel portion, the reference portion having at least two positioning references arranged along a first direction, the first direction being a length direction of the lens barrel; At least two locking rings, the at least two locking rings are respectively fixed on the inner wall and arranged along the first direction; At least two lenses, a first lens of the at least two lenses is fixed between a first positioning reference of the at least two positioning references and a first locking ring of the at least two locking rings, and the first lens contacts the first positioning reference, a second lens of the at least two lenses is fixed between a second positioning reference of the at least two positioning references and a second locking ring of the at least two locking rings, and the second lens contacts the second positioning reference.

2. The lens assembly according to claim 1, characterized in that: The barrel portion includes at least two barrels arranged and connected along the first direction, the first locking ring and the first lens are both fixed in the first barrel of the at least two barrels, and the second locking ring and the second lens are both fixed in the second barrel of the at least two barrels.

3. The lens assembly according to claim 2, characterized in that: The first cylinder and the second cylinder are connected to form an integrated structure.

4. The lens assembly according to claim 2 or 3, characterized in that: The reference portion is an integrated structure, the first locking ring and the second locking ring are respectively located on both sides of the reference portion, the surface of the reference portion facing the first locking ring is the first positioning reference, and the surface of the reference portion facing the second locking ring is the second positioning reference.

5. The lens assembly according to any one of claims 1 to 4, characterized in that: The reference portion is provided with a through hole extending along the first direction.

6. The lens assembly according to any one of claims 1 to 5, characterized in that: The third cylinder and the fourth cylinder adjacent to each other in the at least two cylinders are connected to form a split structure; The reference portion includes at least two bosses arranged along the first direction, the first boss of the at least two bosses, the first locking ring and the first lens are all fixed in the third cylinder, and the second boss of the at least two bosses, the second locking ring and the second lens are all fixed in the fourth cylinder.

7. The lens assembly according to claim 6, characterized in that: The lens barrel further includes a first convex portion fixed to the outer wall of the third barrel and a second convex portion fixed to the outer wall of the fourth barrel, wherein the first convex portion abuts against the second convex portion.

8. The lens assembly according to claim 6 or 7, characterized in that: The lens barrel further includes a first connecting portion, a first portion of the first connecting portion is disposed on an outer wall of the third barrel, and a second portion of the first connecting portion is disposed on an outer wall of the fourth barrel.

9. The lens assembly according to claim 8, characterized in that: The first connection portion is disposed on the outer walls of the third cylinder and the fourth cylinder in a threaded connection manner.

10. The lens assembly according to claim 8 or 9, characterized in that: The first connecting portion is an integrated structure.

11. The lens assembly according to claim 8 or 9, characterized in that: The first connecting part is a split structure, and the first connecting part includes a first connecting body and a second connecting body arranged and connected along the first direction, the first connecting body is connected to the outer wall of the third cylinder, and the second connecting body is connected to the outer wall of the fourth cylinder.

12. The lens assembly according to any one of claims 1 to 11, characterized in that: The lens barrel comprises at least three barrels arranged along the first direction; At least three of the cylinders are connected to form a split structure; or, among the at least three cylinders, two adjacent cylinders are connected to form an integrated structure, and two adjacent cylinders are connected to form a split structure.

13. The lens assembly according to claim 12, characterized in that: Each two cylinders connected in a split structure are connected to a first connecting portion; Each of the first connecting parts is an integrated structure; Or, each of the first connecting parts is a split structure; Alternatively, part of the first connection portion is an integrated structure, and part of the first connection portion is a split structure.

14. The lens assembly according to claim 12, wherein: A first connecting portion is connected between the cylinder body connected as an integrated structure and the cylinder body connected as a split structure; The first connecting parts are all one-piece structures; or, the first connecting parts are all split structures.

15. The lens assembly according to any one of claims 1 to 14, characterized in that: The lens assembly also includes a collar, which is fixed to the inner wall of the lens barrel; at least one lens is fixed to the inner wall of the collar.

16. The lens assembly according to claim 15, characterized in that: The material of the collar includes plastic.

17. The lens assembly according to claim 15 or 16, characterized in that: Part of the at least two lenses is fixed to the inner wall of the sleeve ring, and the remaining part of the lenses is fixed to the inner wall of the lens barrel and contacts the inner wall of the lens barrel.

18. The lens assembly according to claim 15 or 16, characterized in that: Each of the lenses is fixed to the inner wall of the collar.

19. The lens assembly according to any one of claims 15 to 18, characterized in that: The cylinder portion includes at least two cylinders arranged and connected along the first direction; The sleeve ring includes at least two ring bodies fixed in a first barrel of the at least two barrels and arranged along the first direction, and the first direction is the length direction of the lens barrel.

20. The lens assembly according to claim 19, wherein: The number of the first lenses is at least two; the number of the ring bodies is less than the number of the first lenses, the first part of the first lenses is fixed to the inner wall of the first ring body among the at least two ring bodies, and the second part of the first lenses is fixed to the inner wall of the second ring body among the at least two ring bodies.

21. The lens assembly according to claim 19, wherein: The number of the ring bodies is the same as the number of the first lenses, and each of the first lenses is respectively fixed to the inner wall of each of the ring bodies.

22. The lens assembly according to any one of claims 19 to 21, characterized in that: Two adjacent ring bodies are in contact with each other.

23. The lens assembly according to claim 22, wherein: The surface connecting two adjacent ring bodies is a step surface.

24. The lens assembly according to claim 22 or 23, characterized in that: The lens assembly further includes a first spacer, which is located inside the ring body and fixed between two adjacent first lenses.

25. The lens assembly according to any one of claims 19 to 21, characterized in that: There is a distance between two adjacent ring bodies; The lens assembly also includes a second spacer ring, which is fixed between two adjacent ring bodies.

26. The lens assembly according to claim 25, characterized in that: The surface of the second spacer facing the ring body covers a portion of the surface of the ring body facing the second spacer, and covers a portion of the surface of the first lens.

27. The lens assembly according to any one of claims 15 to 26, characterized in that: The material of each of the lenses includes glass; or, the material of each of the lenses includes plastic; or, the material of a part of the lenses includes glass, and the material of another part of the lenses includes plastic.

28. The lens assembly according to any one of claims 15 to 27, characterized in that: The material of the lens is the same as that of the ring.

29. An electronic device, characterized in that: It comprises a shell and the lens assembly according to any one of claims 1 to 28, wherein the lens assembly is fixed in the shell.

Images