Lens assembly and electronic device

Abstract

A lens assembly (1) and an electronic device. The lens assembly (1) comprises: a lens barrel (10), the lens barrel (10) comprising a barrel portion (11) and a reference portion (12) provided on an inner wall of the barrel portion (11), the reference portion (12) having at least two positioning references (122, 123) arranged in a first direction, and the first direction being the length direction of the lens barrel (10); at least two lock rings (41, 42), the at least two lock rings (41, 42) being separately fixed on the inner wall and arranged in the first direction; and at least two lenses (20), a first lens (22) among the at least two lenses (20) being fixed between a first positioning reference (122) among the at least two positioning references (122, 123) and a first lock ring (41) among the at least two lock rings (41, 42), the first lens (22) being in contact with the first positioning reference (122), a second lens (23) among the at least two lenses (20) being fixed between a second positioning reference (123) among the at least two positioning references (122, 123) and a second lock ring (42) among the at least two lock rings (41, 42), and the second lens (23) being in contact with the second positioning reference (123). The assembly precision of the lens assembly can be improved.

Description

Lens components and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202310799425.2 and application name “Lens Assembly and Electronic Device,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of lens technology, and in particular to a lens assembly and electronic equipment. Background Art

[0003] Lens assemblies are used in electronic devices such as cameras in automotive, security, and aerospace applications. These assemblies typically consist of a lens barrel, multiple lenses secured to the barrel's inner wall, a spacer between adjacent lenses, and a locking ring.

[0004] To correct for phase aberration and achieve focusing and imaging, the parameters of each lens element in the lens assembly can be adjusted, as can a combination of lenses with convex and concave surfaces. This can result in either a convex or concave surface in the lens element that contacts the spacer. When the convex surface contacts the spacer, the contact between the mirror and the spacer is linear, and the locking ring's guiding action along the length of the lens barrel can cause the mirror element to slip and tilt. Given the multiple lens elements in a lens assembly, this can lead to cumulative errors, resulting in lower assembly precision.

[0005] Summary of the Invention

[0006] 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.

[0007] 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.

[0008] The lens barrel includes a barrel portion and a reference portion provided on an 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, wherein the at least two positioning references may include a first positioning reference and a second positioning reference.

[0009] 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. The first locking ring and the second locking ring are respectively fixed on the inner wall of the lens barrel and arranged along the first direction.

[0010] 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 convex. 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 convex, and the mirror surfaces of the remaining first lenses may be concave. The multiple first lenses are arranged along the first direction and are all fixed between the first positioning reference and the first locking ring.

[0011] The at least two lenses may include one or more second lenses. When the at least two lenses include one second lens, the mirror surface of the second lens may be convex. 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 contacts 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 convex, and the mirror surface of a region of the second lenses may be concave. The multiple second lenses are arranged along the first direction and are all fixed between the second positioning reference and the second locking ring.

[0012] During the lens assembly process, after the lens barrel and all lenses are fabricated, the first lens can be secured to the inner wall of the lens barrel, brought into contact with the first positioning datum, and the first locking ring can be installed into the lens barrel from the end of the first lens facing away from the first positioning datum, thereby locking the first lens into a fixed position within the lens barrel. Furthermore, the second lens can be secured to the interior of the lens barrel, brought into contact with the second positioning datum, and the second locking ring can be installed into the lens barrel from the end of the second lens facing away from the second positioning datum, thereby locking the second lens into a fixed position within the lens barrel. Thus, the assembly of the lens assembly is completed.

[0013] When the assembly error generated after the first lens is installed in the lens barrel and the assembly error generated after the second lens is installed in the lens barrel interact with each other, it will lead to error accumulation, causing the first lens or the second lens to tilt or shift in center, and the tilt and shift are large. Because in this 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 produce a large tilt or shift. In other words, this application can improve the assembly accuracy of the lens assembly, thereby improving the production yield.

[0014] Furthermore, the present application utilizes the aforementioned structure to achieve high assembly accuracy, thus eliminating the need for a shoulder structure. This eliminates the need for adding a shoulder to existing lens production processes, thereby reducing lens manufacturing costs. Furthermore, the problem of low assembly accuracy between the lens and the lens barrel due to difficulties in ensuring the flatness of the shoulder structure will not occur. Furthermore, the addition of the shoulder structure will not degrade the structural strength of the lens, leading to stress concentration and resulting fragility when subjected to force. Finally, the addition of the shoulder structure will not increase the overall size of the lens, thereby increasing the overall size of the lens assembly.

[0015] 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 within the first barrel of the at least two barrels, and the second locking ring and the second lens are both fixed within the second barrel of the at least two barrels. A first installation space can be formed between the first locking ring and the first positioning reference, and the first lens can be fixed within the first installation space; a second installation space can be formed between the second locking ring and the second positioning reference, and the second lens can be fixed within the second installation space.

[0016] In some embodiments, the first barrel and the second barrel are connected to form an integral structure. The integral structure may be manufactured using 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 can be manufactured using a one-piece molding method. For example, the barrel portion can be manufactured using injection molding or other methods. This makes the barrel portion relatively simple to manufacture and assemble.

[0017] In some embodiments, the reference portion is an integrated structure. For example, the reference portion can be a plate-shaped structure. The plate-shaped reference portion can be fixed to the inner wall of the barrel portion, and the reference portion is located in the middle of the barrel portion. The first locking ring and the second locking ring are respectively located on either side of the reference portion. The surface of the reference portion facing the first locking ring serves as 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 serves as the second positioning reference, and the second lens is fixed between the reference portion and the second locking ring.

[0018] Regarding the structure of the lens barrel consisting of the reference portion and the barrel portion, in one possible embodiment, the lens barrel can be manufactured in an integral manner, such as by injection molding. In another possible embodiment, the reference portion and the barrel portion can be manufactured separately, and then the lens barrel is manufactured by gluing or laser welding.

[0019] Furthermore, the reference portion is provided with a through hole extending in a first direction. The cross-sectional shape of the lens barrel is annular. The through hole provided in the reference portion can be circular, square, or other shapes. When the through hole is circular, the cross-sectional shape of the reference portion is also annular, that is, the first positioning reference is annular. The first lens is fixed between the reference portion and the first locking ring. The first positioning reference is provided on the surface of the reference portion that contacts the first lens. When the surface of the first lens that contacts the first positioning reference is concave, the portion of the concave surface away from the center contacts the first positioning reference. When the surface of the first lens that contacts the first positioning reference is convex, the contact between the convex surface and the first positioning reference is linear contact. Thus, the first lens contacts a portion of the first positioning reference. With the through hole provided in the reference portion, the first lens can contact the annular first positioning reference, and the reference portion and the first locking ring can secure the first lens. Furthermore, the provision of the through hole reduces the weight of the reference portion, thereby reducing the weight of the lens assembly, achieving a lightweight design of the lens assembly.

[0020] In some embodiments, the third and fourth adjacent barrels of the at least two barrels are connected to form a split structure. When the barrel portion includes the third and fourth barrels, the connection of the third and fourth barrels to form a split structure may mean that, when manufacturing the barrel portion, the third and fourth barrels are first manufactured separately, and then the third and fourth barrels are connected to form the barrel portion by gluing, laser welding, or other connecting means.

[0021] The reference portion includes at least two bosses arranged along a first direction. The cross-sectional shape of the bosses can be circular. The first boss, the first locking ring, and the first lens of the at least two bosses are all fixed within the third barrel, with the first lens positioned between the first boss and the first locking ring. The second boss, the second locking ring, and the second lens of the at least two bosses are all fixed within the fourth barrel, with the second lens positioned between the second boss and the second locking ring. In this way, during use of the lens assembly, if the first barrel is damaged but the second barrel is not, only the first barrel can be replaced, thereby reducing the maintenance cost of the lens assembly.

[0022] In some embodiments, the lens barrel further includes a first protrusion fixed to the outer wall of the third barrel and a second protrusion fixed to the outer wall of the fourth barrel, wherein the first protrusion abuts the second protrusion. When connecting the first barrel and the second barrel, the first protrusion and the second protrusion can be connected by gluing or laser welding, and the contacting surfaces of the first barrel and the second barrel can be connected by gluing or laser welding, thereby achieving the connection between the first barrel and the second barrel. This can increase the connection area between the first barrel and the second barrel, thereby improving the connection strength between the first barrel and the second barrel.

[0023] In some embodiments, the lens barrel further comprises a first connecting portion, wherein 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. Thus, 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 second 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. The spacing error between the first and second lenses can then be adjusted to ensure that the spacing error meets the required error.

[0024] Furthermore, the first connecting portion is threadably connected to the outer walls of the third and fourth barrels. That is, the first portion of the first connecting portion is threadably connected to the outer wall of the third barrel, and the second portion of the first connecting portion is threadably connected to the outer wall of the fourth barrel. During assembly of the lens assembly, the spacing error between the third and fourth barrels can be adjusted by adjusting the length of the third barrel screwed into the first connecting portion, or by adjusting the length of the fourth barrel screwed into the first connecting portion. This simplifies the process of adjusting the spacing error between the third and fourth barrels.

[0025] In one possible embodiment, the first connecting portion is an integral structure. This may mean that the first connecting portion is manufactured using an integrally molded structure, for example, the first connecting portion is manufactured using injection molding. In this way, the structure of the first connecting portion is relatively simple and easy to manufacture.

[0026] In another possible embodiment, the first connecting portion is a split structure. The first connecting portion includes a first connecting body and a second connecting body arranged and connected along a first direction, with opposing surfaces of the first and second connecting bodies 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 and second connecting bodies can be connected by gluing or laser welding. Since the first connecting portion is a split structure, the spacing error between the third and fourth barrels can be adjusted by adjusting the connection position of the third barrel on the first connecting body and the connection position of the fourth barrel on the second connecting body, thereby adjusting the spacing error between the first and second lenses. The position of the first connecting body on the second connecting body can also be adjusted along a second direction and a third direction to adjust the center offset error between the first and second lenses. The second direction and the third direction are both perpendicular to the first direction, and the second direction is perpendicular to the third direction. Therefore, in this embodiment, the spacing error between the first and second lenses can be adjusted, and the center offset error between the first and second lenses can also be adjusted in the second and third directions respectively.

[0027] The lens barrel includes at least three barrels arranged along a first direction. In one possible embodiment, the at least three barrels are connected to form a split structure. In this way, each barrel can be replaced separately when damaged, thereby reducing the maintenance cost of the lens assembly.

[0028] In another possible embodiment, among the at least three cylinders, some adjacent two cylinders are connected to form an integral structure, and some adjacent two 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.

[0029] When at least three cylinders are connected in a split-type structure, a first connecting portion is connected between each two cylinders in the split-type structure. Regarding the structure of the first connecting portion, in one possible embodiment, each first connecting portion is a one-piece structure. This makes the structure of each first connecting portion relatively simple, and the assembly between the first connecting portion and the cylinder is relatively simple.

[0030] In another possible embodiment, each first connecting portion is a split structure. This allows adjustment of the spacing error between lenses fixed within different barrels, as well as adjustment of the center offset error of lenses fixed within different barrels. This results in higher assembly precision for the lens assembly.

[0031] In another possible embodiment, some of the first connecting portions are integral, while others are split. During lens assembly, if the center offset error between the lenses within the two barrels meets the center offset error requirement, the outer walls of the two barrels can be connected to the integral first connecting portion. If the center offset error between the lenses within the two barrels exceeds the center offset error requirement, the outer walls of the two barrels can be connected to the split first connecting portion. This ensures that the lens assembly meets the assembly accuracy requirements while also simplifying the lens assembly structure to a certain extent.

[0032] When two adjacent cylinders among the at least three cylinders are connected to form an integral structure, and two adjacent cylinders are connected to form a split structure, a first connecting portion is connected between the cylinder connected to form an integral structure and the cylinder connected to form a split structure. In one possible embodiment, the first connecting portion is an integral structure. In another possible embodiment, the first connecting portion is a split structure. When there are multiple first connecting portions, all of the multiple first connecting portions are integral structures; or, all of the multiple first connecting portions are split structures; or, some of the multiple first connecting portions are integral structures, and the remaining first connecting portions are split structures.

[0033] The lens assembly also includes a collar. The collar is fixed to the inner wall of the lens barrel. The outer surface of the collar is in contact with the inner wall of the lens barrel, forming an interference fit. Specifically, the inner wall of the lens barrel is typically circular in cross-section, and the outer surface of the collar is also circular in cross-section. Thus, the outer diameter 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. The at least one lens and the collar may also form an interference fit.

[0034] 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 precision, 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 the error between the center line of the lens fixed on the inner wall of the ring and the center line of the inner wall of the lens barrel smaller, thereby reducing the center offset error of the lens in the lens assembly, thereby improving the assembly accuracy of the lens assembly.

[0035] In some embodiments, the collar is made of plastic. Specifically, it can be optical-grade plastic, which can be processed to an accuracy of 0.1 μm, i.e., between 0.1 μm and 0.9 μm. This further improves the collar's processing accuracy, thereby further improving the assembly accuracy of the lens assembly.

[0036] Furthermore, during use of the lens assembly, both the lens and the collar generate heat, affecting their thermal properties. For example, the lens' optical parameters, such as refractive index, lens aperture, center thickness, and spacing between adjacent lenses, will change with temperature. The collar's cross-sectional outer and inner diameters, length, and other parameters will also change with temperature. When the lens' material differs from the collar's, the amount of change in the lens' optical parameters will differ from the amount of change in the collar's parameters. Furthermore, when the difference in thermal expansion coefficient between the lens' material and the collar's material is significant, the image plane of the lens assembly will drift, resulting in a temperature drift problem. When the collar's material is plastic, since plastic can be processed with high precision, the temperature drift problem can be addressed during the design phase by adjusting the lens' optical parameters or the collar's parameters.

[0037] Regarding the connection between the at least two lenses, the collar, and the lens barrel, in one possible embodiment, some of the at least two lenses are fixed to the inner wall of the collar, while the remaining lenses are fixed to 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 via the collar, while the remaining lenses are directly fixed to the inner wall of the lens barrel. In actual applications, the materials of different lenses may vary. Therefore, a lens with lower processing precision may be fixed to the inner wall of the collar, while a lens with higher processing precision may be fixed to the inner wall of the lens barrel.

[0038] In another possible embodiment, each lens is fixed to the inner wall of the collar, so as to ensure that the center offset error of each lens is small.

[0039] The collar includes at least two ring bodies fixed within a first barrel of the at least two barrel bodies and arranged along a first direction, the first direction being the length of the barrel. If the collar is too long and multiple lenses are fixed within a single collar, the lens located in the middle of the collar may be difficult to assemble due to the interference fit between the lens and the collar. Therefore, when the collar includes at least two ring bodies, each ring body is relatively short, thereby facilitating assembly of the lens and the ring bodies. Furthermore, the assembly accuracy of the lens and the ring bodies can be improved.

[0040] Regarding the relationship between the number of ring bodies and lenses, in one possible embodiment, 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 guaranteed that the center offset error of each first lens meets the center offset error requirement.

[0041] In another possible embodiment, the number of ring bodies is the same as the number of first lenses. In this case, each first lens is fixed to the inner wall of each ring body. Thus, when the machining accuracy of each ring body is high, the center offset error of each first lens can be guaranteed to meet the center offset error requirements.

[0042] Regarding the distance between two adjacent ring bodies, in one possible embodiment, 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 ring body can be used to position the other ring body along the first direction, thereby making the assembly of the ring bodies more convenient.

[0043] Furthermore, the surface connecting the two adjacent ring bodies is a stepped surface. That is, of the two adjacent ring bodies, the surface of the first ring body facing the second ring body is a stepped surface, and the surface of the second ring body facing the first ring body is also a stepped 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 stepped surface, the two ring bodies can be connected not only through a surface perpendicular to the first direction, but also through a surface parallel to the first direction, thereby increasing the connection area of ​​the two ring bodies and improving the connection strength of the two ring bodies.

[0044] In addition, the lens assembly also 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 greater than two, the number of first spacers located inside the ring body can be one less than the number of first lenses, with one first spacer fixed between every two adjacent first lenses. When assembling the lens assembly, the first lenses and the first spacers can be installed into the ring body one by one in a specific order, and then the ring body with the first lenses and the first spacers can be fixed in the lens barrel to achieve assembly of the lens assembly. By providing the first spacer, the spacing requirements between the two adjacent first lenses can be met.

[0045] In another possible embodiment, a spacing exists between two adjacent ring bodies. In this case, the size of the ring body along the first direction can be the same as the size of the mounting surface of the first lens and the ring body along the first direction. Thus, the spacing between two adjacent ring bodies is the same as the spacing between two adjacent first lenses. This can reduce the size of the collar along the first direction, thereby reducing the collar's volume and, in turn, the cost of the lens assembly.

[0046] 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 serves to separate the two adjacent ring bodies and also serves to separate the two adjacent first lenses. Therefore, by providing the second spacer, the required spacing between the two adjacent first lenses can be met.

[0047] Furthermore, 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 also covers a portion of the surface of the first lens. Since the second spacer can generally be made of plastic or rubber, 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.

[0048] Regarding the material of the lenses, in one possible embodiment, the material of each lens comprises glass. When the lens has a large diameter, the material of the lens may comprise glass, which facilitates processing.

[0049] In another possible embodiment, each lens is made of plastic. When the lens aperture is relatively small, each lens can be made of plastic. This reduces processing costs. Furthermore, each lens can have high processing precision, low water absorption, high temperature resistance, high consistency, and be suitable for mass and automated production, thereby reducing processing costs. Furthermore, the lens can have a high degree of freedom in shape, capable of processing aspheric surfaces and possessing aspheric properties. This allows a single lens to perform multiple functions, thereby reducing the number of lenses and further reducing the size of the lens assembly.

[0050] In another possible embodiment, some lenses are made of glass, while others are made of plastic. For lenses with larger apertures, the material may be glass; for lenses with smaller apertures, the material may be plastic. This can reduce the manufacturing cost of the lens assembly to a certain extent. In this way, the material selection for each lens can be determined based on the lens aperture and the volume of the lens assembly.

[0051] 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, meeting 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 conducted 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 undergoes thermal expansion will be transferred to the ring. The ring can act as a buffer for the lens, thereby effectively improving the problems of extrusion deformation and tilting of the lens.

[0052] 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

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. 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 any creative work.

[0054] FIG1a is a schematic diagram showing an assembly relationship among a lens barrel, a lens, and a locking ring when the lens assembly includes a lens;

[0055] FIG1 b is a schematic diagram of another assembly relationship of the lens barrel, the lens, and the locking ring when the lens assembly includes one lens;

[0056] FIG1c is a schematic diagram of an assembly relationship among the lens barrel, the lens, and the locking ring when the mirror surface in FIG1a slips and tilts;

[0057] FIG2a is a schematic diagram showing another assembly relationship among the lens barrel, lens, and locking ring when multiple mirror surfaces in the lens assembly are convex;

[0058] FIG2 b is a schematic diagram showing another assembly relationship among the lens barrel, lens, and locking ring when one of the mirror surfaces in the lens assembly is convex;

[0059] FIG3 a is a schematic diagram of the assembly relationship between the spacer and the first lens;

[0060] FIG3 b is a schematic diagram of the assembly relationship between the spacer and the second lens;

[0061] FIG3 c is a schematic diagram of the assembly relationship between the spacer and the third type of lens;

[0062] FIG3 d is a schematic diagram of the assembly relationship between the spacer and the fourth type of lens;

[0063] FIG3e is a schematic diagram of the assembly relationship between the spacer and the fifth lens;

[0064] FIG3 f is a schematic diagram of the assembly relationship between the spacer and the sixth type of lens;

[0065] FIG4 is a schematic structural diagram of a lens assembly in the related art;

[0066] FIG5 is a schematic structural diagram of the lens in FIG4 ;

[0067] FIG6 a is a schematic structural diagram of a lens assembly in the first embodiment of the present application;

[0068] FIG6 b is a schematic structural diagram of a lens assembly in a second embodiment of the present application;

[0069] FIG7 is a schematic structural diagram of the lens barrel in the lens assembly shown in FIG6a;

[0070] FIG8 a is a schematic structural diagram of a lens assembly in a third embodiment of the present application;

[0071] FIG8 b is a schematic structural diagram of a lens assembly in a fourth embodiment of the present application;

[0072] FIG9 is a schematic structural diagram of a lens assembly in a fifth embodiment of the present application;

[0073] FIG10 is a schematic structural diagram of a lens assembly in a sixth embodiment of the present application;

[0074] FIG11 is a schematic structural diagram of a lens assembly in a seventh embodiment of the present application;

[0075] FIG12a is a schematic structural diagram of a lens assembly in an eighth embodiment of the present application;

[0076] FIG12 b is a schematic structural diagram of a lens assembly in a ninth embodiment of the present application;

[0077] FIG13a is a schematic structural diagram of a lens assembly in a tenth embodiment of the present application;

[0078] FIG13 b is a schematic structural diagram of a lens assembly in the eleventh embodiment of the present application;

[0079] FIG13c is a schematic structural diagram of a lens assembly according to a twelfth embodiment of the present application;

[0080] FIG14a is a schematic structural diagram of a lens assembly in the thirteenth embodiment of the present application;

[0081] FIG14 b is a schematic structural diagram of a lens assembly in the fourteenth embodiment of the present application;

[0082] FIG15 is a schematic structural diagram of a lens assembly according to a fifteenth embodiment of the present application;

[0083] FIG16 is a schematic structural diagram of a lens assembly according to a sixteenth embodiment of the present application;

[0084] FIG17a is a schematic structural diagram of a lens assembly according to a seventeenth embodiment of the present application;

[0085] FIG17 b is a schematic structural diagram of a lens assembly according to an eighteenth embodiment of the present application;

[0086] FIG17c is a schematic structural diagram of a lens assembly in the nineteenth embodiment of the present application.

[0087] 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 portion; 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

[0088] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0089] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated 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 or plural items. For example, at least one of a, b or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0090] In the description and claims of the embodiments of this application, the terms "first" and "second" are used to distinguish different objects, rather than to describe a specific order of objects. For example, the terms "first target object" and "second target object" are used to distinguish different objects, rather than to describe a specific order of objects.

[0091] "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, including a series of steps or units. The method, system, product or device is 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 with respect 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 in the orientation of the components in the drawings.

[0092] In the embodiments of this 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 this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0093] In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more. For example, "multiple processing units" means two or more processing units; "multiple systems" means two or more systems.

[0094] In the fields of automotive, security, aerospace, etc., electronic devices such as cameras need to use a lens assembly 1 to obtain the required images. As shown in Figures 1a and 1b, the lens assembly 1 generally includes a lens barrel 10 and a lens 20 fixed to the inner wall of the lens barrel 10.

[0095] Because a single lens 20 is difficult to achieve good focusing and imaging, multiple lenses 20 are typically used, as shown in Figures 2a and 2b, and the multiple lenses 20 are arranged along the length of the lens barrel 10. Furthermore, by adjusting the parameters of each lens 20 in the lens assembly 1 and combining lenses 20 with convex and concave surfaces, phase aberration can be corrected to achieve focusing and imaging.

[0096] There is a certain distance between each two adjacent lenses 20 . Therefore, as shown in FIG. 2 a , a spacer 30 can be fixed between each two adjacent lenses 20 to achieve an air gap between the adjacent lenses 20 .

[0097] As shown in FIG. 2 a , the lens assembly 1 may further include a locking ring 40 . The locking ring 40 is fixed to the inner wall of the lens barrel 10 and contacts the lens 20 to lock the lens 20 to a fixed position in the lens barrel 10 .

[0098] Since lens assembly 1 may utilize a combination of lens elements 20 having flat, convex, or concave surfaces, the surface contacting spacer 30 may be convex, concave, or flat. As shown in Figures 3a and 3b, when the surface of lens element 20 contacting spacer 30 is concave or flat, the contact between the surface and spacer 30 is surface contact. In this case, the connection between lens element 20 and spacer 30 is secure, meaning that lens element 20 is securely fixed within lens barrel 10. As shown in Figures 3c, 3d, 3e, and 3f, when the surface of lens element 20 contacting spacer 30 is convex, the contact between the surface and spacer 30 is line contact. The guiding effect of spacer 30 along the length of lens barrel 10 may cause the surface to slip and tilt.

[0099] It is understood that, as shown in Figure 1a, when the mirror surface is not sliding or tilting, the center of curvature 29 of the mirror surface coincides with the center line 28 of the lens. As shown in Figure 1c, when the mirror surface is sliding or tilting, the center of curvature 29 of the mirror surface does not coincide with the center line 28 of the lens.

[0100] As shown in FIG2a , 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 in the lens assembly 1 shown in FIG2a , the number of line contacts is greater than two, which will lead to error accumulation, thereby causing a more serious situation in which the mirror surface slips and tilts.

[0101] As shown in FIG2b , four lenses 20 are also fixed within the lens barrel 10, three of which have flat surfaces. One lens 20 has one flat surface and another convex surface. The contact between this lens 20 and the positioning reference 121 is line contact, while all other contact is surface contact. Therefore, in the lens assembly 1 shown in FIG2b , there is only one line contact, and thus the slip and tilt errors of the mirror surfaces meet the error requirements.

[0102] In view of this, in a related art, as shown in FIG4 , a lens barrel 10 is typically a single lens barrel 10, with a plurality of lenses 20 fixed to the inner wall of the lens barrel 10, with each pair of lenses 20 separated by a spacer 30. A positioning reference 121 is defined within the lens barrel 10, with the lens 20 closest to the positioning reference 121 in contact with the positioning reference 121. A 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.

[0103] As shown in Figure 5 , for a lens 20 with a convex surface, a shoulder structure 21 is machined onto the lens 20 through edge milling or other shouldering processes. As shown in Figure 4 , this shoulder structure 21 can contact the locking ring 40, creating a surface contact and improving assembly precision. Furthermore, the spacer 30 also creates surface contact with the lens 20, making the assembly process more stable and less susceptible to slippage or tilting.

[0104] However, in the related art, the production of lens 20 requires the addition of a shouldering process to existing processes, which increases the processing cost of lens 20. Furthermore, the flatness of shoulder structure 21 is difficult to ensure, meaning the precision of shoulder structure 21 is low. Furthermore, the addition of shoulder structure 21 deteriorates the structural strength of lens 20, making it susceptible to stress concentration when subjected to force, resulting in brittleness of lens 20. Finally, the addition of shoulder structure 21 increases the overall size of lens 20, and consequently, the overall size of lens assembly 1, hindering the miniaturization of electronic devices.

[0105] Based on this, an embodiment of the present application provides a lens assembly 1 that 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.

[0106] 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, in which the lens assembly 1 is fixed.

[0107] For ease of description, as shown in FIG6a , two directions can be defined: a first direction (X direction) and a second direction (Y direction). The X direction represents the length of the lens assembly 1, and the Y direction represents the width of the lens assembly 1. The X and Y directions are perpendicular to each other.

[0108] As shown in FIG. 6 a , the lens assembly 1 may include: a lens barrel 10 , at least two locking rings 40 , and at least two lenses 20 .

[0109] As shown in FIG6 a , the lens barrel 10 includes a barrel portion 11 and a reference portion 12 provided on the inner wall of the barrel portion 11 . 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 .

[0110] As shown in FIG6a , at least two locking rings 40 are respectively fixed to 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. The first locking ring 41 and the second locking ring 42 are both fixed to the inner wall of the lens barrel 10 and arranged along the X-direction. The first locking ring 41 and the second locking ring 42 are respectively located on either side of the reference portion 12.

[0111] As shown in FIG6a , at least two lenses 20 are fixed to the inner wall of the lens barrel 10. A first lens 22 of the at least two lenses 20 is fixed between a first positioning datum 122 and a first locking ring 41. Thus, the first positioning datum 122 can provide positioning for the first lens 22 along the X-axis, that is, the first positioning datum 122 can provide positioning for the first lens 22 along the length of the lens barrel 10. Furthermore, the first locking ring 41 can lock the first lens 22. A second lens 23 of the at least two lenses 20 is fixed between a second positioning datum 123 and a second locking ring 42. Thus, the second positioning datum 123 can provide positioning for the second lens 23 along the X-axis, that is, the second positioning datum 123 can provide positioning for the second lens 23 along the length of the lens barrel 10. Furthermore, the second locking ring 42 can lock the second lens 23.

[0112] During the assembly of the lens assembly 1, after the lens barrel 10 and all the lenses 20 are manufactured, the first lens 22 can be installed into the lens barrel 10, and the first lens 22 can be brought into contact with the first positioning datum 122. The first locking ring 41 can be installed into the lens barrel 10 from the end of the first lens 22 facing away from the first positioning datum 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 installed into the lens barrel 10, and the second lens 23 can be brought into contact with the second positioning datum 123. The second locking ring 42 can be installed into the lens barrel 10 from the end of the second lens 23 facing away from the second positioning datum 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.

[0113] When the assembly error generated after the first lens 22 is installed in the lens barrel 10 and the assembly error generated after the second lens 23 is installed in the lens barrel 10 interact with each other, it will lead to error accumulation, resulting in the first lens 22 or the second lens 23 tilting or center offset, and the tilt and offset are relatively large. Because 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 produce a large tilt or offset. In other words, the embodiment of the present application can improve the assembly accuracy of the lens assembly 1, thereby improving the production yield.

[0114] Moreover, as shown in FIG5 , the lens 20 in the related art is provided with a shoulder structure 21. However, the embodiment of the present application adopts the above-mentioned structure, which can achieve higher assembly accuracy. Therefore, the shoulder structure 21 is not required. When producing the lens 20, there is no need to add a shouldering process based on the existing process, thereby reducing the processing cost of the lens 20. Moreover, the 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 will not occur. In addition, the problem of the structural strength of the lens 20 being weakened due to the addition of the shoulder structure 21, which may easily cause stress concentration and make the lens 20 fragile when subjected to force, will not occur. Finally, the problem of the overall size of the lens 20 being increased due to the addition of the shoulder structure 21, thereby increasing the overall size of the lens assembly 1, will not occur.

[0115] Below, each component of the lens assembly 1 according to the embodiment of the present application is described in detail.

[0116] The barrel portion 11 includes at least two barrels 111 arranged and connected along the X direction. For example, as shown in FIG6a , 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.

[0117] 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. As shown in Figure 7, the first barrel 112 and the second barrel 113 are connected to form an integral structure. The integral structure can refer to being manufactured using 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 can be manufactured using a one-step molding method. For example, the barrel portion 11 can be manufactured using injection molding or other methods. Alternatively, the barrel portion 11 can also be obtained by cutting and fine-machining a profile with a circular cross-section. 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.

[0118] As shown in Figure 7, 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 the end of the first cylinder 112 away from the second cylinder 113. The internal threads 114 on the second cylinder 113 are located at the end of the second cylinder 113 away from the first cylinder 112.

[0119] As shown in FIG6a , 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 located in the middle of the barrel 11 along the X-axis.

[0120] The material of the reference portion 12 can be the same as or different from that of the barrel portion 11. Regarding the structure of the lens barrel 10 composed of the reference portion 12 and the barrel portion 11, in one possible embodiment, when the material of the reference portion 12 is the same as that of the barrel portion 11, the lens barrel 10 can be manufactured using an integral molding method, such as injection molding. In another possible embodiment, when the material of the reference portion 12 is different from that of the barrel portion 11, the reference portion 12 and the barrel portion 11 can be manufactured separately, and then the reference portion 12 can be fixed to the interior of the barrel portion 11 by gluing or laser welding to form the lens barrel 10.

[0121] Moreover, as shown in Figure 7, 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.

[0122] As shown in Figure 7, two opposing surfaces of the reference portion 12 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 ring, and the second positioning reference 123 is also in the shape of a ring.

[0123] As shown in FIG6 a , the first locking ring 41 is fixed in the first cylinder 112 . The outer surface of the first locking ring 41 is provided with an external thread 411 . 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 a threaded connection.

[0124] As shown in Figure 6a, 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 threaded connection.

[0125] As shown in FIG6a , the first locking ring 41 and the second locking ring 42 are respectively located on either side of the reference portion 12. A first installation space 125 is formed between the first locking ring 41 and the first positioning reference 122. A second installation space 126 is formed between the second locking ring 42 and the second positioning reference 123.

[0126] The lens assembly 1 may include at least two lenses 20, all of which may include two convex surfaces, with the remaining surfaces being concave or flat. Furthermore, among the at least two lenses 20, one surface of the first lens 22 is convex, one surface of the second lens 23 is convex, and the first lens 22 and the second lens 23 are different lenses 20. For example, as shown in FIG6a , the lens assembly 1 includes six lenses 20, the surfaces contacting the first positioning reference 122 and the second locking ring 42 being convex, and the remaining surfaces being flat.

[0127] As shown in Figure 6a, the first lens 22 can be fixed within the first installation space 125 formed between the first locking ring 41 and the first positioning datum 122. The first lens 22 is fixed between the reference portion 12 and the first locking ring 41. The surface of the reference portion 12 that contacts the first lens 22 serves as the first positioning datum 122. When the surface of the first lens 22 that contacts the first positioning datum 122 is concave, the portion of the concave surface away from the center contacts the first positioning datum 122. When the surface of the first lens 22 that contacts the first positioning datum 122 is convex, the contact between the convex surface and the first positioning datum 122 is linear contact. Therefore, the first lens 22 partially contacts the first positioning datum 122. By providing a through hole 124 in the reference portion 12, the first lens 22 can contact the annular first positioning datum 122, and the reference portion 12 and the first locking ring 41 can secure 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 , thereby achieving a lightweight design of the lens assembly 1 .

[0128] Regarding the number of lenses 20 secured within the first mounting space 125, in one possible embodiment, as shown in FIG6b , a single lens 20 is secured within the first mounting space 125, namely, the first lens 22. One of the mirror surfaces of the first lens 22 is convex, and the other is flat. Furthermore, the flat surface of the first lens 22 can contact the first positioning reference 122, while 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 concave.

[0129] In another possible embodiment, as shown in Figure 6a, multiple lenses 20 are secured within the first mounting space 125. Specifically, in addition to the first lens 22, the lenses 20 secured within the first mounting space 125 may also include other lenses 20, such as two third lenses 24, with both mirror surfaces of the third lenses 24 being flat. In other embodiments, both mirror surfaces of the third lenses 24 may be concave; or, alternatively, one mirror surface of the third lens 24 may be concave and the other flat. This ensures only a single line of contact within the first mounting space 125, thereby reducing error accumulation.

[0130] 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 one possible embodiment, as shown in FIG6b , the number of lenses 20 fixed in the second installation space 126 is one, namely, the second lens 23. One of the mirror surfaces of the second lens 23 is convex, and the other mirror surface is flat. 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 concave. The convex surface of the second lens 23 can also contact the second locking ring 42.

[0131] In another possible embodiment, as shown in Figure 6a, multiple lenses 20 are secured within the second mounting space 126. Specifically, in addition to the second lens 23, the lenses 20 secured within the second mounting space 126 may also include other lenses 20, such as two fourth lenses 25, both surfaces of which are flat. In other embodiments, both surfaces of the fourth lens 25 may be concave, or one surface of the fourth lens 25 may be concave and the other surface flat. This ensures only a single line of contact within the second mounting space 126, thereby reducing error accumulation.

[0132] 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.

[0133] It is understood that the number of lenses 20 secured within the first mounting space 125 and the second mounting space 126 is determined by the structure and arrangement of the lenses 20 in the lens assembly 1, as long as only one linear contact exists within each of the first mounting space 125 and the second mounting space 126. Of course, as shown in FIG2a , when a large number of linear contacts exist in the lens assembly 1, each linear contact can be disposed in each mounting space, or some of the linear contacts can be disposed in a single mounting space, thereby reducing error accumulation to a certain extent.

[0134] Moreover, as shown in FIG. 6 a , 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 .

[0135] In other embodiments of the present application, as shown in FIG. 8 a and FIG. 8 b , the difference from the embodiment shown in FIG. 6 a is that the structure of the lens barrel 10 is different.

[0136] In the embodiment shown in FIG6a , the first barrel 112 and the second barrel 113 are connected to form an integral structure. In this embodiment, as shown in FIG8a and FIG8b , 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 being connected to form a split structure may refer to the following steps: 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.

[0137] In the embodiment shown in Figure 6a, the reference portion 12 is an integrated structure. In this embodiment, as shown in Figures 8a and 8b, the reference portion 12 is a split structure. Exemplarily, the reference portion 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 shown in Figure 8a, when the cylinder 11 includes two cylinders 111, namely a first cylinder 112 and a second cylinder 113, the reference portion 12 includes two bosses 127. For ease of description, the two bosses 127 can be named as a first boss 1271 and a second boss 1272, respectively. The cross-sectional shape of the first boss 1271 and the second boss 1272 can both be circular.

[0138] As shown in Figures 8a and 8b, the first boss 1271, the first locking ring 41, and the first lens 22 are all fixed within the first barrel 112, with the first lens 22 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 serves as the first positioning reference 122, and the first lens 22 contacts the first positioning reference 122.

[0139] As shown in Figures 8a and 8b, the second boss 1272, the second locking ring 42, and the second lens 23 are all fixed within the second barrel 113, with the second lens 23 positioned between the second boss 1272 and the second locking ring 42. The surface of the second boss 1272 facing the second locking ring 42 serves as the second positioning datum 123, with the second lens 23 contacting the second positioning datum 123. Thus, during use of the lens assembly 1, if the first barrel 112 is damaged but the second barrel 113 is intact, only the first barrel 112 can be replaced, thereby reducing the maintenance cost of the lens assembly 1.

[0140] In the embodiment shown in FIG8 a , 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. In the embodiment shown in FIG8 b , 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.

[0141] In other embodiments of the present application, as shown in FIG9 , the difference between the embodiment shown in FIG8 a and the embodiment shown in FIG9 is that the structure of the lens barrel 10 is different. The embodiment shown in FIG9 adds a first protrusion 13 and a second protrusion 14 to the embodiment shown in FIG8 a. That is, in addition to the barrel portion 11 and the reference portion 12, the lens barrel 10 may also include the first protrusion 13 and the second protrusion 14. The first protrusion 13 is fixed to the outer wall of the first barrel 112 and is located at the end of the first barrel 112 facing the second barrel 113. The second protrusion 14 is fixed to the outer wall of the second barrel 113 and is located at the end of the second barrel 113 facing the first barrel 112. The first protrusion 13 and the second protrusion 14 abut against each other.

[0142] When connecting the first barrel 112 and the second barrel 113, the first protrusion 13 and the second protrusion 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, thereby achieving the connection between the first barrel 112 and the second barrel 113. This can increase the connection area between the first barrel 112 and the second barrel 113, thereby improving the connection strength between the first barrel 112 and the second barrel 113.

[0143] In other embodiments of the present application, as shown in FIG10 , the difference from the embodiment shown in FIG8 a lies in the structure of the lens barrel 10. The lens barrel 10 in the embodiment shown in FIG10 is based on the lens barrel 10 in the embodiment shown in FIG8 a and has a first connecting portion 15 added thereto. In other words, in this embodiment, the lens barrel 10 includes a barrel portion 11, a reference portion 12, and a first connecting portion 15.

[0144] As shown in Figure 10, 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. 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.

[0145] Furthermore, the first connecting portion 15 is threadably connected to the outer walls of the first barrel 112 and the second barrel 113. That is, the first portion of the first connecting portion 15 is threadably connected to the outer wall of the first barrel 112, and the second portion of the first connecting portion 15 is threadably connected to the outer wall of the second barrel 113. During assembly of 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 by adjusting the length of the second barrel 113 screwed into the first connecting portion 15. This simplifies the process of adjusting the spacing error between the first barrel 112 and the second barrel 113.

[0146] In this embodiment, as shown in FIG10 , the first connecting portion 15 is an integral structure. This may be referred to as the first connecting portion 15 being manufactured using an integrally molded structure, for example, the first connecting portion 15 being manufactured using injection molding. This makes the structure of the first connecting portion 15 relatively simple and easy to manufacture.

[0147] In other embodiments of the present application, as shown in FIG11 , the difference from the embodiment shown in FIG10 lies in the structure of the first connecting portion 15. In the embodiment shown in FIG10 , the first connecting portion 15 is an integrated structure. In this embodiment, as shown in FIG11 , the first connecting portion 15 is a split structure.

[0148] As shown in Figure 11, the first connecting portion 15 includes a first connecting body 151 and a second connecting body 152, which are arranged and connected along the X-axis. The opposing 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 cylindrical body 112, and the second connecting body 152 is connected to the outer wall of the second cylindrical body 113. The first connecting body 151 and the second connecting body 152 can be connected by gluing or laser welding. Because the first connecting portion 15 is a split structure, the spacing error between the first cylindrical body 112 and the second cylindrical body 113 can be adjusted by adjusting the connection position of the first cylindrical body 112 on the first connecting body 151 and the connection position of the second cylindrical body 113 on the second connecting body 152, thereby adjusting the spacing error between the first and second lenses 22 and 23. The position of the first connecting body 151 on the second connecting body 152 can also be adjusted along the Y and Z directions to adjust the center offset error between the first and second lenses 22 and 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.

[0149] In other embodiments of the present application, as shown in FIG. 12 a , the difference from the embodiment shown in FIG. 6 a lies in the number of lenses 20 with convex mirror surfaces and the structure of the lens barrel 10 .

[0150] In this embodiment, as shown in FIG12a, the number of lenses 20 with convex mirror surfaces is at least three, and the number of barrel bodies 111 in the lens barrel 10 is also at least three. High-precision automated assembly of the lens assembly 1 can be achieved through mirror group coupling technology. As shown in FIG12a, the number of lenses 20 with convex mirror surfaces and the number of barrel bodies 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 barrel bodies 111 in the lens barrel 10 can also be four.

[0151] Among the at least three cylinders 111, some adjacent two cylinders 111 are connected to form an integral structure, while some adjacent two cylinders 111 are connected to form a split structure. For example, as shown in FIG12a, for ease of description, the three cylinders 111 can be named as a first cylinder 112, a second cylinder 113, and a third cylinder 115. The first cylinder 112, the second cylinder 113, and the third cylinder 115 are arranged in sequence along the X direction. The first cylinder 112 and the second cylinder 113 are connected to form an integral structure, while the third cylinder 115 and the second cylinder 113 are connected to form a split structure.

[0152] The first connecting portion 15 is connected between the cylindrical body 111 connected as an integral structure and the cylindrical body 111 connected as a split structure. That is, in this embodiment, the first connecting portion 15 is connected between the second cylindrical body 113 and the third cylindrical body 115. The first connecting portion 15 is an integral structure. In other embodiments, as shown in FIG12b, the first connecting portion 15 is a split structure.

[0153] 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.

[0154] Other embodiments of the present application differ from the embodiment shown in FIG12a in that the structure of the lens barrel 10 is different. In this embodiment, as shown in FIG13a , at least three barrels 111 are connected in a split structure. This allows each barrel 111 to be replaced individually if damaged, thereby reducing the maintenance cost of the lens assembly 1.

[0155] Each of the two barrels 111 connected in a split-type structure is connected to a first connecting portion 15. Regarding the structure of the first connecting portion 15, in one possible embodiment, some of the first connecting portions 15 are integral, while others are split. For example, as shown in FIG13a , the first connecting portion 15 fixed to the outer walls of the first barrel 112 and the second barrel 113 is a split structure, while the first connecting portion 15 fixed to the outer walls of the second barrel 113 and the third barrel 115 is an integral structure. Thus, 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 integral first connecting portion 15. 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 split first connecting portion 15. This ensures that the assembly accuracy of the lens assembly 1 meets the assembly accuracy requirement while also simplifying the structure of the lens assembly 1 to a certain extent.

[0156] In another possible embodiment, as shown in FIG13 b , each first connecting portion 15 is an integrated structure. In this way, the structure of each first connecting portion 15 is relatively simple, and the assembly between the first connecting portion 15 and the barrel 111 is relatively simple.

[0157] In another possible embodiment, as shown in FIG13c , each first connecting portion 15 is a split structure. This allows adjustment of the spacing error between lenses 20 fixed within different barrels 111, and also allows adjustment of the center offset error of lenses 20 fixed within different barrels 111. This results in higher assembly precision for the lens assembly 1.

[0158] Regarding the related art shown in Figure 2a, the lens assembly 1 has a low assembly error. As shown in Figure 14a, an embodiment of the present application also provides a lens assembly 1, which may include: a lens barrel 10, a spacer 30, a ring 50 and at least two lenses 20.

[0159] As shown in FIG14 a, 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.

[0160] As shown in FIG14 a , in this embodiment, a through hole 124 is provided on the positioning reference 121. In other embodiments, the positioning reference 121 may not be provided with the through hole 124.

[0161] The number of lenses 20 is at least two, for example, the number of 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.

[0162] Any lens 20 can be a spherical lens 20 or an aspherical lens 20, and the spherical lens 20 can be a meniscus lens 20, a biconvex lens 20, a biconcave lens 20, a plano-convex lens 20, or a plano-concave lens 20. In the lens assembly 1 shown in FIG14 a, each lens 20 is a biconvex lens 20. In the lens assembly 1 shown in FIG14 b, three lenses 20 are biconvex lenses 20, and the other two lenses 20 are aspherical lenses 20.

[0163] Regarding the material of the lenses 20, in one possible embodiment, 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 can facilitate processing.

[0164] In another possible embodiment, each lens 20 is made of plastic. When the aperture of the lenses 20 is relatively small, each lens 20 can be made of plastic. The plastic can be optical-grade plastic. Because the mold manufacturing cost for plastic lenses 20 can be reduced by over 70% compared to glass lenses 20, processing costs can be reduced.

[0165] Below, the performance of optical grade plastics and ordinary plastics is compared. The comparison results are shown in Table 1.

[0166] Table 1

[0167] As can be seen from Table 1, optical-grade plastics have greater high-temperature resistance than ordinary plastics. Most optical-grade plastics also have a higher flexural modulus than ordinary plastics. A higher flexural modulus makes installation easier.

[0168] Furthermore, when each lens 20 is made of plastic, each lens 20 can exhibit high processing precision, low water absorption, high temperature resistance, and high consistency, making it suitable for mass and automated production, thereby reducing processing costs. Furthermore, the lens 20 can be shaped with a high degree of freedom, enabling the production of aspheric surfaces and possessing aspheric properties. Thus, a single lens 20 can perform multiple functions, thereby reducing the number of lenses 20 and further reducing the volume of the lens assembly 1.

[0169] In another possible embodiment, some lenses 20 are made of glass, while others are made of plastic. For example, for lenses 20 with larger diameters, the material may include glass, while for lenses 20 with smaller diameters, the material may include plastic. This can reduce the manufacturing cost of the lens assembly 1 to a certain extent. Thus, the material selection for each lens 20 can be determined based on the diameter of the lens 20 and the volume of the lens assembly 1.

[0170] As shown in FIG14 a, the collar 50 is fixed to the inner wall of the lens barrel 10. The outer surface of the collar 50 is in contact with the inner wall of the lens barrel 10, and an interference fit is formed. That is, the cross-section of the inner wall of the lens barrel 10 is generally circular, and the outer surface of the cross-section of the collar 50 is also circular. Therefore, 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.

[0171] In this embodiment, some of the at least two lenses 20 are fixed to the inner wall of the collar 50, while the remaining 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, some of the lenses 20 are fixed to the inner wall of the lens barrel 10 via the collar 50, while the remaining lenses 20 are directly fixed to the inner wall of the lens barrel 10. For example, as shown in FIG14a, 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 in contact with the inner wall of the lens barrel 10. In actual applications, the materials of the different lenses 20 may be different. Therefore, the lens 20 with lower processing precision may be fixed to the inner wall of the collar 50, while the lens 20 with higher processing precision may be fixed to the inner wall of the lens barrel 10. In addition, each lens 20 may also have an interference fit with the collar 50.

[0172] Next, the assembly accuracy of lens assemblies 1 with different structures is compared. The comparison results are shown in Table 2.

[0173] Table 2

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

[0175] Table 2 shows the relationship between the parameters after overtightening and overpressure after assembly and before assembly. Before assembly refers to the assembly and pre-tightening of the components in lens assembly 1. After assembly refers to the state of overtightening and overpressure 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 1 μm, the change in auto scaling (AS) is 1 μm, and the change in decenter (DC) is 1 μm. For the lens assembly 1 with a plastic lens 20 and no collar 50 structure, the change in PV is 2 μm, the change in AS is 0.7 μm, and the change in DC is 1 μm. For the lens assembly 1 with a plastic lens 20 and a collar 50 structure, the change in PV is 0.5 μm, the change in AS is 0.2 μm, 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 smaller. This can reduce the stress concentration generated during the assembly process, thereby reducing reliability risks.

[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 precision, 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 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 smaller, thereby reducing the center offset error of the lens 20 in the lens assembly 1, thereby improving the assembly accuracy of the lens assembly 1.

[0178] Furthermore, when the apertures of the lenses 20 are the same, as shown in FIG14 a, the dimension L1 of the collar 50 along the X-axis 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 diameter of the inner wall of the collar 50 is the same as the diameter of the inner wall in contact with the lens 20.

[0179] In this embodiment, the material of the collar 50 may include plastic. Specifically, it may include optical-grade plastic material. The processing accuracy of this type of material can be as low as 0.1 μm, that is, the processing accuracy of this type of 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] Furthermore, during use of the lens assembly 1, both the lens 20 and the collar 50 generate heat, affecting their thermal properties. 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, and the spacing between adjacent lens elements 20, will change with temperature. Parameters such as the outer diameter, inner diameter, and length of the collar 50 cross section will also change with temperature. When the material of the lens 20 differs from that of the collar 50, the amount of change in the optical parameters of the lens 20 will differ from the amount of change in the parameters of the collar 50. Furthermore, when the difference in thermal expansion coefficient between the lens 20 material and the collar 50 material is significant, the image plane of the lens assembly 1 will drift, i.e., a temperature drift problem will occur. When the collar 50 is made of plastic, due to the high processing precision of plastic, the temperature drift problem can be addressed during the design phase by adjusting the optical parameters of the lens 20 or the parameters of the collar 50, thereby improving the thermal drift problem.

[0181] Furthermore, regarding the material selection for lens 20 and collar 50, in one possible embodiment, the material of lens 20 is the same as that of collar 50. That is, when the material of collar 50 comprises plastic, the material of lens 20 may also comprise plastic. This allows for assembly of lens 20 and collar 50 using various methods, including snap-fit, step-fit, and hybrid assembly methods, while also improving the sealing performance of lens assembly 1. When the material of lens 20 and collar 50 is the same, the variation in the optical parameters of lens 20 is relatively close to that of collar 50, resulting in no or minimal image plane drift on lens assembly 1, meeting drift requirements. In other words, this embodiment can alleviate temperature drift issues. Furthermore, after the structural and parameter design of lens assembly 1 is completed, simulation experiments can be conducted on lens assembly 1 to test the impact of temperature drift on its performance, thereby improving temperature drift issues by modifying various parameters during the design phase. Furthermore, when the lens 20 and the ring 50 are made of the same material, when the lens assembly 1 is in use, the stress concentration point caused by thermal expansion of the lens 20 is transferred to the ring 50. The ring 50 can act as a buffer for the lens 20, thereby effectively alleviating the problems of squeeze deformation and tilt of the lens 20. For example, the ring 50 can reduce the DC, PV, and AS values ​​by more than 50%.

[0182] In a specific embodiment, the material of each lens 20 is the same as that of the collar 50. Alternatively, the material of some lenses 20 is the same as that of the collar 50, while the material of other lenses 20 is different from that 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 that of the collar 50, while the material of the lens 20 in contact with the inner wall of the lens barrel 10 is different from that of the collar 50.

[0183] It is understood 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 locking ring 40 fixed with a gasket to the lens 20 of the at least two lenses 20 that faces away from the positioning reference 121, the material of the gasket and the locking ring 40 may also include plastic.

[0184] In another possible embodiment, the material of lens 20 and collar 50 are different, but their coefficients of thermal expansion are the same or similar. Similar coefficients of thermal expansion may mean that the difference between the coefficients of thermal expansion of the two materials is less than 10. In this way, during use of lens assembly 1, the changes in the optical parameters of lens 20 are relatively close to those of collar 50, resulting in no or minimal image plane drift in lens assembly 1, meeting drift requirements.

[0185] In a specific embodiment, the material of each lens 20 is different from the material of the collar 50, and the thermal expansion coefficient of each lens 20 is the same as or similar to the thermal expansion coefficient of the collar 50. Alternatively, the thermal expansion coefficient of some lenses 20 is the same as or similar to the thermal expansion coefficient of the collar 50, while the thermal expansion coefficient of other lenses 20 is significantly different from the thermal expansion coefficient of the collar 50.

[0186] As shown in FIG14a , the spacer 30 can be located inside the lens barrel 10 . Furthermore, when a spacing is required between two adjacent lenses 20, the spacer 30 can be fixed between the two lenses 20. When the two adjacent lenses 20 need to be in contact, the spacer 30 does not need to be fixed between the two lenses 20. For example, as shown in FIG14b , when two lenses 20 away from the reference portion 12 are in contact, 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 located 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 located between the two lenses 20 is directly fixed to the inner wall of the lens barrel 10.

[0188] Furthermore, when two lenses 20 are located within the same ring body 51, the number of spacers 30 located within the ring body 51 can be one, and the spacer 30 can be fixed between the two lenses 20. When the number of lenses 20 located within the same ring body 51 is greater than two, and there is a gap between each pair of lenses 20, the number of rings 50 can be at least two. Furthermore, as shown in FIG14 a, the number of spacers 30 can 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 be in contact with 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 in contact with the inner wall of the lens barrel 10, the outer wall of the spacer 30 may be in contact with 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 spacers 30 can be installed sequentially into the ring body 51 in a specific order, and then the ring body 51 with the lenses 20 and spacers 30 installed can be fixed in the lens barrel 10 to complete the assembly of the lens assembly 1. By providing the spacers 30, the required spacing between two adjacent lenses 20 can be met.

[0191] In other embodiments of the present application, as shown in Figure 15, the difference between the embodiment shown in Figure 14a and the embodiment shown in Figure 14a lies in the structure of the collar 50 and the connection relationship between the lens 20, the collar 50, and the lens barrel 10. In the embodiment shown in Figure 14a, the dimension L1 of the collar 50 along the X-axis is less than the distance L2 between the second end 117 of the lens barrel 10 and the positioning reference 121. Moreover, in the embodiment shown in Figure 14a, part of the lens 20 is fixed to the inner wall of the collar 50, while the remaining part of the lens 20 is in contact with the interior of the barrel 11. In contrast, in this embodiment, as shown in Figure 15, the dimension L1 of the collar 50 along the X-axis 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. This ensures that the center offset error of each lens 20 is small.

[0192] It is understandable that in other embodiments, the dimension L1 of the collar 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 collar 50 .

[0193] As shown in FIG15 , the collar 50 includes at least two ring bodies 51 arranged along the X-direction. If the collar 50 is too long and multiple lenses 20 are secured within the collar 50, the lens 20 located in the middle of the collar 50 may be difficult 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, each ring body 51 is relatively short, thereby facilitating assembly of the lens 20 and the ring body 51. Furthermore, the assembly accuracy of the lens 20 and the ring body 51 can be improved.

[0194] Furthermore, as shown in FIG15 , the number of ring bodies 51 is less than the number of lenses 20. In this case, some of the at least two lenses 20 are fixed to the inner wall of the first ring body 51 of the at least two ring bodies 51, and some of the at least two lenses 20 are fixed to the inner wall of the second ring body 51 of the at least two ring bodies 51. When there are two ring bodies 51 and the number of lenses 20 is greater than two, one lens 20 is fixed to the inner wall of the first ring body 51, and multiple lenses 20 are fixed to the inner wall of the second ring body 51; alternatively, multiple 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 alternatively, multiple lenses 20 are fixed to the inner wall of the first ring body 51, and multiple lenses 20 are fixed to the inner wall of the second ring body 51. In this way, when the machining 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 requirements.

[0195] As shown in Figure 15, 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, thereby making the assembly of the ring bodies 51 more convenient.

[0196] Furthermore, as shown in FIG15 , the surface connecting two adjacent ring bodies 51 is a stepped surface 52. That is, of the two adjacent ring bodies 51, the surface of the first ring body 511 facing the second ring body 512 is a stepped surface 52, and the surface of the second ring body 512 facing the first ring body 511 is also a stepped 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 stepped surface 52, the two ring bodies 51 can be connected not only through a surface perpendicular to the X-direction, but also through a surface parallel to the X-direction. This increases the connection area of ​​the two ring bodies 51 and improves the connection strength of the two ring bodies 51.

[0197] In other embodiments of the present application, as shown in FIG. 16 , the difference from the embodiment shown in FIG. 15 lies in that the structure of the collar 50 and the fixing position of the spacer 30 are different.

[0198] In this embodiment, as shown in FIG16 , the number of ring bodies 51 is the same as the number of lenses 20. In this case, each lens 20 is fixed to the inner wall of each ring body 51. Thus, when the machining accuracy of each ring body 51 is high, the center offset error of each lens 20 can be guaranteed to meet the center offset error requirements.

[0199] Furthermore, as shown in FIG16 , there is a spacing between two adjacent ring bodies 51. In this case, the size of the ring body 51 along the X-axis can be the same as the size of the mounting surface of the lens 20 and the ring body 51 along the X-axis. Thus, the spacing between two adjacent ring bodies 51 is the same as the spacing between two adjacent lens 20. This can reduce the size of the collar 50 along the X-axis, 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 the two adjacent ring bodies 51, when the spacer 30 is fixed between the two adjacent ring bodies 51, the spacer 30 has the function of separating the two adjacent ring bodies 51 and also has the function of separating the two adjacent lenses 20. Therefore, by providing the spacer 30, the spacing requirement between the two adjacent lenses 20 can be met.

[0201] Furthermore, in one possible embodiment, 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 also covers a portion of the surface of the lens 20. Since the second spacer 30 can generally be made of plastic or rubber, 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 embodiment, as shown in FIG16 , the surface of the spacer 30 facing the ring body 51 overlaps with the surface of the ring body 51 facing the spacer 30.

[0202] It is understood that the embodiments shown in Figures 14a, 14b, 15, and 16 are schematic diagrams of the connection structure between the lens 20, spacer 30, lock ring 40, and 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, as shown in Figure 17a, the lens barrel 10 includes two barrels 111. In one possible implementation, a collar 50 is provided in one barrel 111, and no collar 50 is provided in the other barrel 111. For example, the number of collar 50 can be one, as shown in Figure 17a, the collar 50 can be fixed to the inner wall of the second barrel 113; or, as shown in Figure 17b, the collar 50 can be fixed to the inner wall of the first barrel 112. 17 a , 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 one fourth lens 25 are fixed to the inner wall of the collar 50. The other fourth lens 25 is fixed to the inner wall of the second barrel 113, and the fourth lens 25 is in contact with the inner wall of the second barrel 113.

[0203] In another possible implementation, as shown in FIG17 c , a collar 50 is disposed in both the first cylinder 112 and the second cylinder 113 .

[0204] It is understood that in this embodiment, the collar 50 provided in the barrel 111 is the collar 50 in the lens assembly shown in Figure 14a. In other embodiments, the collar 50 may also be the collar 50 in the lens assembly shown in Figure 15 or Figure 16.

[0205] Moreover, as shown in FIG17c , 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 adopts the lens barrel 10 of the lens assembly 1 shown in Figure 6a. In other embodiments, the lens barrel 10 can also adopt the lens barrel 10 in Figure 8a, Figure 8b, Figure 9, Figure 10, Figure 11, Figure 12a, Figure 12b, Figure 13a, Figure 13b or Figure 13c.

[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 this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this 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 at least three of the cylinders, two adjacent cylinders are connected It is an integrated structure, and some adjacent two 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, characterized in that: 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