Lens set coaxial method and lens

Abstract

The embodiment of the present application provides a lens set coaxial method and a lens. The lens set comprises at least two lenses, and the lens set coaxial method comprises the following steps: determining the installation direction of each lens in a lens barrel in an optical architecture model according to the optical architecture model; setting the flash position of each lens according to the predetermined installation direction of each lens; determining the parting line layout of a mold according to the set flash position; manufacturing the lens through the mold; and installing the manufactured lens in the lens barrel according to the predetermined installation direction, so that the at least two lenses are coaxial.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of lens mounting, and more particularly, to a lens group coaxial method and a lens. BACKGROUND

[0002] With the increasing popularity of virtual reality (VR), augmented reality (AR) and other electronic devices, the use of projection lenses is increasing significantly. In this context, it is crucial to ensure the coaxiality of the lenses in the projection lens, which is directly related to the imaging quality of the device and the user experience. Therefore, how to accurately control and ensure the coaxiality of the lenses has become a core element that cannot be ignored in the design and manufacturing process of the projection lens.

[0003] Currently, visual guidance devices are mainly used to ensure the coaxiality of multiple lenses. However, this method requires the introduction of a large number of auxiliary devices, increasing production costs. High costs lead to a decline in the market competitiveness of products, and consumers' willingness to purchase also weakens.

[0004] Therefore, how to ensure the coaxiality of the lenses while reducing production costs and improving the market competitiveness of products has become a key problem that needs to be solved. SUMMARY

[0005] The purpose of the present application is to provide a new technical solution for a lens group coaxial method and a lens.

[0006] In a first aspect, the present application provides a lens group coaxial method. The lens group includes at least two lenses, and the method includes the following steps:

[0007] According to the optical architecture model, determine the installation direction of each lens in the optical architecture model;

[0008] According to the pre-determined installation direction of each lens, set the flash position of each lens;

[0009] According to the set flash position, determine the parting line layout of the mold;

[0010] Manufacture the lens through the set mold;

[0011] Install the manufactured lens in the lens barrel according to the pre-determined installation direction, so that the lenses in the lens group are coaxial.

[0012] Optionally, the installation direction of each lens in the lens barrel includes:

[0013] The lens is installed in the lens barrel along the axis of the lens barrel from the first end of the lens barrel; or the lens is installed in the lens barrel along the axis of the lens barrel from the second end of the lens barrel.

[0014] Optionally, the setting the flash position of each lens according to the predetermined installation direction of each lens specifically comprises:

[0015] when the installation direction of the lens is from the first end of the lens barrel to the lens barrel, the flash of the lens is set on the vertical surface of the lens and close to the first surface of the lens;

[0016] when the installation direction of the lens is from the second end of the lens barrel to the lens barrel, the flash of the lens is set on the vertical surface of the lens and close to the second surface of the lens;

[0017] wherein when the lens is installed in the lens barrel, the surface of the lens facing the first end of the lens barrel is defined as the first surface, and the surface of the lens facing the second end of the lens barrel is defined as the second surface.

[0018] Optionally, according to the set flash position, the layout of the parting line of the mold specifically comprises: when the flash of the lens is set on the vertical surface of the lens and close to the second surface of the lens, the setting position of the parting line in the mold is corresponding to the position of the vertical surface of the lens close to the second surface of the lens;

[0019] when the flash of the lens is set on the vertical surface of the lens and close to the first surface of the lens, the setting position of the parting line in the mold is corresponding to the position of the vertical surface of the lens close to the first surface of the lens.

[0020] Optionally, before the manufactured lens is installed in the lens barrel according to the predetermined installation direction, it further comprises:

[0021] based on the optical architecture model and the set flash position of each lens, a clearance corresponding to each flash is formed in the lens barrel.

[0022] Optionally, the formation of the clearance corresponding to each flash in the lens barrel specifically comprises:

[0023] at least part of the inner wall of the lens barrel is inclined away from the axis direction of the lens barrel to form an inclined surface, and the area avoided by the inclined surface relative to the vertically arranged inner wall of the lens barrel is the clearance.

[0024] Optionally, along the inner diameter direction of the lens barrel, the maximum size range of the clearance is 0.025mm-0.045mm.

[0025] Optionally, in the optical architecture model, the outer diameter size of each adjacent two lenses is different, and the difference of the outer diameter size of the adjacent two lenses ranges from 0.4mm to 0.6mm.

[0026] Optionally, based on the optical architecture model, a stepped surface is further formed in the lens barrel, and the stepped surface is used to carry the lens.

[0027] In a second aspect, the embodiments of the present application also provide a lens. The lens barrel comprises a lens barrel and a lens group, the lens group comprising at least two lenses, and the lens group is installed in the lens barrel by the lens group coaxial method as described in the first aspect.

[0028] Optionally, a plurality of voids are formed in the lens barrel, and the voids correspond to the burrs of the lenses in the lens group one by one.

[0029] According to the embodiments of the present application, starting from the planning of the optical architecture model, through a series of preset steps, it is ensured that the lens group can finally achieve high-precision coaxial installation. Specifically, first, the installation direction of each lens in the lens barrel is determined, and the burr position of each lens is set accordingly. Subsequently, in combination with the optimized mold design, the parting line layout of these molds corresponds to the preset burr position. In this way, when the lenses manufactured by the molds are accurately installed in the lens barrel according to the pre-planned installation direction, the entire lens group can effectively achieve coaxial, thereby greatly guaranteeing the imaging quality and optical stability of the lens group. This way of realizing the coaxiality of the lens group through structure limitation (determination of installation direction, determination of burr position and setting of mold) through limitation can reduce cost and improve product competitiveness.

[0030] Other features of the present application and the advantages thereof will become apparent in the course of the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1 A flow chart of the lens group coaxial method provided by the embodiments of the present application is shown.

[0033] Figure 2 A structure exploded view of the lens provided by the embodiments of the present application is shown.

[0034] Figure 3 A structure schematic diagram of the lens provided by the embodiments of the present application is shown. Figure 2 A structure schematic diagram of the lens provided by the embodiments of the present application is shown.

[0035] Figures 4a-4c A structure schematic diagram of the lens provided by the embodiments of the present application is shown. Figure 3 An enlarged structure view of B, C and D in the lens provided by the embodiments of the present application is shown.

[0036] Figure 5 A schematic diagram of the burr position in the lens is shown.

[0037] Figure 6 A cross-sectional view of the lens structure is shown. Figure 2 A cross-sectional view of the lens structure is shown.Figure 1 .

[0038] Figures 7a-7c An enlarged view of the structure at G, F and H in the lens barrel is shown. Figure 6

[0039] Figure 8 A cross-sectional view of the lens barrel is shown. Figure 2 Figure 2 .

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1. a lens barrel;

[0042] 21. a first lens; 22. a second lens; 23. a third lens; 24. a spacer ring;

[0043] S1. a first surface; S2. a second surface; S3. a vertical surface;

[0044] 3. a burr; 4. a clearance; 51. a first inclined surface; 52. a second inclined surface; 53. a third inclined surface. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present application will now be described in detail with reference to the figures. It should be noted that the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0046] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0047] Techniques and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification where appropriate.

[0048] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0049] It should be noted that like numbers and letters refer to like items throughout the drawings, and once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0050] In the embodiments of the present application, a lens set coaxial method is provided, which aims to ensure that the coaxiality between at least two lenses can be maintained accurately during the installation process.

[0051] Referring to Figure 1 , the lens set coaxial method mainly includes steps S1-S5.​​

[0052] S1: determining the installation direction of each lens in the lens barrel 1 according to the optical architecture model;

[0053] S2: setting the location of the flash 3 of each lens according to the pre-determined installation direction of each lens;

[0054] S3: determining the parting line layout of the mold according to the set location of the flash 3;

[0055] S4: manufacturing the lens by the set mold;

[0056] S5: installing the manufactured lens in the lens barrel 1 according to the pre-determined installation direction, so that the lenses in the lens group are coaxial.

[0057] In step S1, the optimal installation direction of each lens in the lens barrel 1 is determined according to the optical architecture model.

[0058] Specifically, the optical architecture model (which can be an optical architecture model diagram) generally includes the geometric shape, material properties, and relative position and arrangement of optical elements (such as lenses, mirrors, etc.). Figure 2 The optical architecture model facilitates the user to optimize the performance of the optical system to meet specific imaging requirements.

[0059] After the optical architecture model is determined, the number of lenses in the lens barrel 1 is also determined. Based on the specific parameters such as the number of lenses to be installed and the depth of the lens barrel 1, we can pre-plan and set the installation direction of each lens in the lens barrel 1.

[0060] When the depth of the lens barrel 1 is large, the inner diameter of the lens barrel 1 is relatively small, and the number of lenses to be installed is large, the lenses in the optical architecture model cannot be simply installed one by one in sequence according to a uniform installation direction. In this case, in order to ensure that all lenses can be correctly and effectively installed, it is usually necessary to install them from different sides of the lens barrel 1 to adapt to the space limitation and ensure the correct alignment and cooperation between the lenses. Exemplarily, the lens barrel 1 is a hollow cylindrical structure with two open ends.

[0061] In a specific embodiment, referring to Figure 2 and Figure 6 the installation direction of each lens in the lens barrel 1 specifically includes:

[0062] the lens is installed in the lens barrel 1 from the first end of the lens barrel 1 along the axis of the lens barrel 1; or the lens is installed in the lens barrel 1 from the second end of the lens barrel 1 along the axis of the lens barrel 1.

[0063] Exemplarily, referring toFigure 6 In the case of vertical placement of the lens barrel 1 (the axis of the lens barrel 1 is vertically arranged), a part of the lenses needs to be installed in the lens barrel 1 from the upper end of the lens barrel 1 (i.e., the lenses are installed from top to bottom), and another part of the lenses needs to be installed in the lens barrel 1 from the lower end of the lens barrel 1 (i.e., the lenses are installed from bottom to top).

[0064] Referring to Figure 6 , three lenses are installed in the lens barrel 1, which specifically include: a first lens 21, a second lens 22, and a third lens 23. The outer diameter dimensions of the first lens 21, the second lens 22, and the third lens 23 are defined in combination with the internal structure of the lens barrel 1, and the first lens 21 is installed in the lens barrel 1 from the lower end of the lens barrel 1. The second lens 22 is installed in the lens barrel 1 from the upper end of the lens barrel 1, and after the installation of the second lens 22, the third lens 23 is installed in the lens barrel 1 from the upper end of the lens barrel 1.

[0065] Exemplarily, in the case of horizontal placement of the lens barrel 1 (the axis of the lens barrel 1 is horizontally arranged), a part of the lenses needs to be installed in the lens barrel 1 from the left end of the lens barrel 1, and another part of the lenses needs to be installed in the lens barrel 1 from the right end of the lens barrel 1.

[0066] Referring to Figure 2 , three lenses are installed in the lens barrel 1, which specifically include: a first lens 21, a second lens 22, and a third lens 23. The outer diameter dimensions of the first lens 21, the second lens 22, and the third lens 23 are defined in combination with the internal structure of the lens barrel 1, and the first lens 21 is installed in the lens barrel 1 from the right end of the lens barrel 1. The second lens 22 is installed in the lens barrel 1 from the left end of the lens barrel 1, and after the installation of the second lens 22, the third lens 23 is installed in the lens barrel 1 from the left end of the lens barrel 1.

[0067] In step S2, the position of the burr 3 of each lens is accurately set according to the pre-planned installation direction of each lens. The selection of the position of the burr 3 needs to ensure that the lenses can maintain coaxiality during processing and installation.

[0068] Specifically, during the processing of the lenses, it is difficult to completely avoid the generation of burrs 3 on the edges of the lenses. Therefore, in this step, the specific position of the burr 3 on the lens is accurately planned in advance according to the predetermined installation direction of each lens. This pre-set strategy ensures that the subsequently manufactured lenses can form burrs 3 at the specified positions. When these manufactured lenses are assembled into the lens barrel 1 according to the pre-planned installation direction, the adverse effects on the coaxiality of the lens group caused by the burr 3 problem can be effectively avoided, thereby ensuring the overall performance and precision of the optical system.

[0069] In a specific embodiment, referring to Figure 3 and Figures 4a-4cAccording to the predetermined installation direction of each lens, the position of the burr 3 of each lens is set, and the position of the burr 3 of each lens is set specifically as follows:

[0070] When the installation direction of the lens is from the first end of the lens barrel 1 into the lens barrel 1, the burr 3 of the lens is set on the vertical surface S3 of the lens and is close to the first surface S1 of the lens;

[0071] When the installation direction of the lens is from the second end of the lens barrel 1 into the lens barrel 1, the burr 3 of the lens is set on the vertical surface S3 of the lens and is close to the second surface S2 of the lens;

[0072] Wherein when the lens is installed in the lens barrel 1, the surface of the lens facing the first end of the lens barrel 1 is defined as the first surface S1, and the surface of the lens facing the second end of the lens barrel 1 is defined as the second surface S2.

[0073] In this embodiment, with reference to Figure 3 , Figure 2 and Figure 6 , if the installation direction of the lens is from the first end (the first end is referred to as the "upper end" or the "left end") of the lens barrel 1 into the lens barrel 1, the burr 3 of the lens is set on the vertical surface S3 of the lens (i.e. the side surface of the lens), and this burr 3 is close to the surface of the lens facing the first end (the first end is referred to as the "upper end" or the "left end") of the lens barrel 1. That is, if the installation direction of the lens is from the first end (the first end is referred to as the "upper end" or the "left end") of the lens barrel 1 into the lens barrel 1, the first surface S1 of the lens faces the first end of the lens barrel 1, the second surface S2 of the lens faces the second end of the lens barrel 1, and the burr 3 of the lens needs to be set close to the first surface S1 of the lens.

[0074] On the contrary, if the installation direction of the lens is from the second end ("lower end" or "right end") of the lens barrel 1 into the lens barrel 1, the burr 3 of the lens is also set on the vertical surface S3 of the lens, but this burr 3 is close to the surface of the lens facing the second end ("lower end" or "right end") of the lens barrel 1. That is, the installation direction of the lens is from the second end ("lower end" or "right end") of the lens barrel 1 into the lens barrel 1, the first surface S1 of the lens faces the first end of the lens barrel 1, the second surface S2 of the lens faces the second end of the lens barrel 1, and the burr 3 of the lens needs to be set close to the second surface S2 of the lens.

[0075] In short, no matter whether the lens is installed from the first end or the second end of the lens barrel 1, as long as the installation is in the predetermined direction, the side of the lens close to the burr 3 will always be the last one to enter the lens barrel 1. Since the size of the burr 3 is usually above 0.05 mm, there is almost no need to worry about the burr 3 size interfering with the installation during the installation process. Such design effectively avoids the adverse effects of the burr 3 problem on the coaxiality of the lens group, thereby ensuring that the overall performance and accuracy of the optical system remain at a high level.

[0076] Through such setting, when the lens is installed inside the lens barrel 1, no matter whether the lens enters from the first end or the second end, the position of the burr 3 can be ensured to meet the installation requirements and not adversely affect the coaxiality of the lens group. Such detailed processing further improves the overall performance and stability of the optical system.

[0077] For example, referring to Figure 5 If the predetermined installation direction of the lens is not considered and the position of the burr 3 of the lens is not specially set, the burr 3 will randomly appear at the upper, middle or lower position of the lens vertical surface S3 during the manufacturing process of the lens. In this case, the position of the burr 3 will adversely affect the installation of the lens and the coaxiality of the lens group, and the specific situation is as follows:

[0078] If the burr 3 is located at the middle of the lens vertical surface S3, no matter whether the lens is installed from the first end or the second end of the lens barrel 1, the burr 3 at this position will cause interference during the installation process, thereby affecting the coaxiality of the lens group and leading to the performance degradation of the optical system.

[0079] If the burr 3 is located at the lower part of the lens vertical surface S3 and the lens is installed from the first end of the lens barrel 1, the burr 3 at this position will rub against the inner wall of the lens barrel 1 or other components during the installation, affecting the smooth installation of the lens, while also damaging the coaxiality of the lens group and reducing the accuracy of the optical system.

[0080] If the burr 3 is located at the upper part of the lens vertical surface S3 and the lens is installed from the second end of the lens barrel 1, similarly, the burr 3 at this position will cause interference during the installation process, affecting the accurate positioning of the lens, thereby affecting the coaxiality of the lens group and the overall performance of the optical system.

[0081] Therefore, in order to ensure the performance and accuracy of the optical system, the embodiments of the present application consider the installation direction of the lens when manufacturing the lens and reasonably set the position of the burr 3 to avoid the occurrence of the above adverse situations.

[0082] For example, referring to Figure 3 and Figures 4a-4cThe three lenses include a first lens 21, a second lens 22 and a third lens 23. The first lens 21 is installed in the lens barrel 1 from the right end of the lens barrel 1. The second lens 22 is installed in the lens barrel 1 from the left end of the lens barrel 1. The third lens 23 is installed in the lens barrel 1 from the left end of the lens barrel 1 after the second lens 22 is installed.

[0083] Referring to Figure 4c For the first lens 21, the lens edge 3 is set to be located at a lower position of the lens surface S3.

[0084] Referring to Figure 4b For the second lens 22, the lens edge 3 is set to be located at an upper position of the lens surface S3.

[0085] Referring to Figure 4a For the third lens 23, the lens edge 3 is set to be located at an upper position of the lens surface S3.

[0086] In step S3, the parting line layout of the mold is determined according to the set lens edge 3 position. The parting line design of the mold needs to ensure that the lens can be formed according to the predetermined shape and size in the manufacturing process, and by determining the parting line layout of the mold, it is ensured that the edge 3 of each lens is located at the predetermined position of the lens.

[0087] Specifically, in the mold manufacturing process of the lens, the position of the parting line plays a decisive role, and the parting line directly indicates the specific area where the lens edge 3 is likely to appear. Generally speaking, the design position of the mold parting line is highly consistent with the position of the lens edge 3. In short, if the parting line is located at a certain position of the mold, then the lens is most likely to form an edge 3 at the corresponding position.

[0088] In a specific embodiment, the parting line layout of the mold is determined according to the set lens edge 3 position, which specifically includes:

[0089] When the lens edge 3 is set to be located at the lens surface S3 and close to the second surface S2 of the lens, the set position of the parting line in the mold is corresponding to the position of the lens surface S3 close to the second surface S2 of the lens;

[0090] When the lens edge 3 is set to be located at the lens surface S3 and close to the first surface S1 of the lens, the set position of the parting line in the mold is corresponding to the position of the lens surface S3 close to the first surface S1 of the lens.

[0091] Specifically, if the design requirement is to control the lens' s flash 3 at the vertical surface S3, and these flashes 3 need to be adjacent to the lens' s second surface S2, the mold' s parting line should be accurately set at the position corresponding to the lens' s vertical surface S3 and close to the second surface S2. This means that when the mold is closed for injection molding, the position of the parting line will directly correspond to the desired flash 3 position on the lens, ensuring that the flash 3 formed by the material overflow during injection molding meets the design requirements.

[0092] On the contrary, if the design requirement is to control the lens' s flash 3 at the vertical surface S3, but requires these flashes 3 to be adjacent to the lens' s first surface S1, the mold' s parting line should be accurately set at the position corresponding to the lens' s vertical surface S3 and close to the first surface S1. In this way, the position of the parting line remains consistent with the desired flash 3 position on the lens, and the flash 3 formed by the material overflow during injection molding will be strictly controlled within the design range.

[0093] In step S4, the lens is manufactured using the designed mold. In this step, various parameters during the manufacturing process need to be strictly controlled to ensure the quality and precision of the lens.

[0094] In step S5, the manufactured lens is installed in the lens barrel 1 according to the predetermined installation direction. During installation, it is necessary to ensure that each lens can be accurately aligned to its predetermined position, so that all lenses in the lens group can be coaxially installed.

[0095] Therefore, in this embodiment, starting from the planning of the optical architecture model, a series of preset steps are taken to ensure that the lens group can finally achieve high-precision coaxial installation. Specifically, first, the installation direction of each lens in the lens barrel 1 is determined, and the position of the flash 3 of each lens is set accordingly. Then, combined with the optimized mold design, the parting line layout of these molds closely corresponds to the preset flash 3 position. In this way, when the lens manufactured by the mold is accurately installed in the lens barrel 1 according to the pre-planned installation direction, the entire lens group can effectively achieve coaxiality, thereby greatly guaranteeing the imaging quality and optical stability of the lens group. In addition, this way of achieving lens group coaxiality through structural definition (determination of installation direction, determination of flash position and setting of mold) can reduce costs and improve product competitiveness.

[0096] Optionally, after the lens is installed in the lens barrel 1, the flatness requirements of the lens and the spacer ring 24 separating adjacent lenses also need to be met. Specifically, ensuring the overall flatness of the lens and the spacer ring 24 ensures the directional consistency of the lens module, and the flatness is set according to the corresponding flatness control value. For example, the flatness of the lens and the spacer ring 24 is 0.05mm.

[0097] In a specific embodiment, with reference to Figure 6 andFigures 7a-7c Before the manufactured lens is mounted in the lens barrel 1 according to the predetermined mounting direction, it further includes:

[0098] Based on the optical architecture model and the position of the flash 3 of each lens, a clearance 4 corresponding to each flash 3 is formed in the lens barrel 1.

[0099] In this embodiment, in order to ensure that the manufactured lens can be mounted in the lens barrel 1 according to the predetermined mounting direction, a step is added before mounting: based on the optical architecture model and the position of the flash 3 of each lens, a clearance 4 corresponding to each flash 3 is formed in the lens barrel 1.

[0100] Specifically, the presence of the clearance 4 provides additional space for the flash 3 of the lens, avoiding damage to the lens or affecting the coaxiality of the lens group due to friction or collision between the flash 3 and the inner wall of the lens barrel 1 during installation. During installation, even if there is a certain tolerance range in the size of the flash 3 of the lens, the clearance 4 can provide enough space to accommodate these differences, thereby ensuring that the lens can be installed in place.

[0101] Exemplarily, through the optical architecture model, the size and position of the clearance 4 required by each lens during installation can be calculated, ensuring that the clearance 4 can meet the needs of lens installation and not negatively affect the overall optical performance of the lens.

[0102] Further, forming a clearance 4 corresponding to each flash 3 in the lens barrel 1 specifically includes: at least a portion of the inner wall of the lens barrel 1 is inclined to form a slope away from the axis direction of the lens barrel 1, and the area avoided by the slope relative to the vertically arranged inner wall of the lens barrel 1 is the clearance 4.

[0103] Specifically, at least a portion of the inner wall of the lens barrel 1 is designed as a slope inclined away from the axis direction of the lens barrel 1. Through the inclination angle and length of the slope, the size and position of the clearance 4 can be calculated to meet the needs of different lens flashes 3.

[0104] Specifically, the slope relative to the vertically arranged inner wall of the lens barrel 1 will avoid a specific area, which is the clearance 4. The shape and size of the clearance 4 are closely related to the shape and size of the flash 3 of the lens, ensuring that the flash 3 can smoothly enter the clearance 4 without being hindered when the lens is installed.

[0105] In addition, the design of the slope also plays a guiding role, facilitating the installation of the lens. During installation, the lens can smoothly slide into the predetermined position along the slope, reducing the difficulty and time of installation.

[0106] Exemplarily, with reference to Figure 7cCorresponding to the position of the burr 3 of the first lens 21, a first inclined surface 51 is formed on the inner wall of the lens barrel 1, and the area avoided by the first inclined surface 51 is the clearance 4, and the burr 3 is located in the clearance 4.

[0107] Referring to Figure 7b Corresponding to the position of the burr 3 of the second lens 22, a second inclined surface 52 is formed on the inner wall of the lens barrel 1, and the area avoided by the second inclined surface 52 is the clearance 4, and the burr 3 is located in the clearance 4.

[0108] Referring to Figure 7a Corresponding to the position of the burr 3 of the third lens 23, a third inclined surface 53 is formed on the inner wall of the lens barrel 1, and the area avoided by the third inclined surface 53 is the clearance 4, and the burr 3 is located in the clearance 4.

[0109] In an embodiment, the maximum size range of the clearance 4 along the inner diameter direction of the lens barrel 1 is 0.025mm-0.045mm.

[0110] In this embodiment, in order to ensure the convenience and feasibility of lens assembly, the maximum size range of the clearance 4 is 0.025mm-0.045mm.

[0111] Specifically, the size range of 0.025mm-0.045mm can maximize the reduction of the influence on the optical performance of the lens while ensuring the convenience of assembly. This size range is not only suitable for different types of lenses and lens barrels 1, but also can adapt to different assembly processes and tolerance requirements. Preferably, the maximum size range of the clearance 4 is 0.03mm.

[0112] In an embodiment, referring to Figure 8 In the optical architecture model, the outer diameter sizes of every two adjacent lenses are different, and the difference range of the outer diameter sizes of the two adjacent lenses is 0.4mm-0.6mm.

[0113] Specifically, in order to ensure the coaxiality of the two adjacent lenses, the outer diameters of the two adjacent lenses are designed to be different values according to the assembly direction, sequence and position of the burr 3. In particular, in the case that the outer diameter sizes of the two lenses can be equal, the outer diameter sizes of the two lenses are intentionally different by 0.4mm-0.6mm.

[0114] The outer diameter of the third lens 23 is 0.2-0.3mm larger than that of the second lens 22, which is mainly based on the actual needs in the assembly process. In the actual installation, due to the burr 3 formed in the manufacturing process of the lens, the outer diameter of the third lens 23 is made to be 0.2-0.3mm larger than that of the second lens 22, so as to provide an additional gap for the third lens 23 in the assembly process, to avoid the gap reserved for the burr 3 of the second lens 22. In this way, the problem caused by the inability to accurately control the coaxiality of the third lens 23 in the assembly process can be prevented to some extent.

[0115] Exemplarily, referring to Figure 8 , the diameter of the second lens 22 is φ2=50mm, and the diameter of the third lens 23 is φ3=50.4mm.

[0116] Exemplarily, referring to Figure 8 , the diameter of the first lens 21 is φ1=40mm, and the inner diameter corresponding to the position of the burr 3 of the first lens 21 in the lens barrel 1 is φ11=40.06mm (including the size of the clearance 4 corresponding to the burr 3 of the first lens 21).

[0117] The diameter of the second lens 22 is φ2=50mm, and the inner diameter corresponding to the position of the burr 3 of the second lens 22 in the lens barrel 1 is φ21=50.06mm (including the size of the clearance 4 corresponding to the burr 3 of the second lens 22).

[0118] The diameter of the third lens 23 is φ3=50.4mm, and the inner diameter corresponding to the position of the burr 3 of the third lens 23 in the lens barrel 1 is φ31=50.46mm (including the size of the clearance 4 corresponding to the burr 3 of the third lens 23).

[0119] In an embodiment, based on the optical architecture model, a step surface is further formed in the lens barrel 1, and the step surface is used to carry the lens.

[0120] In this embodiment, the main function of the step surface is to carry the lens, to ensure the correct position and stability of the lens in the lens barrel 1, so as to further ensure the coaxiality of the lens group.

[0121] The embodiment of the present application also provides a lens. The lens comprises a lens barrel 1 and a lens group, the lens group comprises at least two lenses, and the lens group is installed in the lens barrel 1 by using the lens group coaxial installation method described above.

[0122] The lens provided by the embodiment of the present application realizes high-precision installation and stable fixation of the lens group by using the lens group coaxial installation method described above, so as to improve the overall optical performance and stability of the lens.

[0123] In one embodiment, a plurality of clearances 4 are formed in the lens barrel 1, and the clearances 4 correspond to the lens edges 3 of the lenses in the lens set one by one.

[0124] In this embodiment, the clearances 4 provide additional space for the lens edges 3, avoiding damage to the lenses or affecting the coaxiality of the lens set due to friction or collision between the lens edges 3 and the inner wall of the lens barrel 1 during installation. During installation, even if there is a certain tolerance range in the size of the lens edges 3, the clearances 4 can provide enough space to accommodate these differences, thereby ensuring that the lenses can be installed in place.

[0125] Exemplarily, the clearances 4 are formed by forming bevels on the inner wall of the lens barrel 1, so that the bevels can also serve as guides to guide the installation of the lenses in the lens barrel 1 in addition to avoiding the lens edges 3.

[0126] The above embodiments mainly describe the differences between the embodiments, and the different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory. In view of the brevity of the writing, it will not be repeated here.

[0127] Although some specific embodiments of the present application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A lens assembly coaxial method, characterized in that: The lens assembly includes at least two lenses, and the method includes the following steps: According to the optical architecture model, determining the installation direction of each lens in the optical architecture model in the lens barrel (1); According to the predetermined installation direction of each lens, the position of the burr (3) of each lens is set; according to the predetermined installation direction of each lens, the position of the burr (3) of each lens is set specifically including: When the lens is installed in the lens barrel (1) from the first end of the lens barrel (1), the burr (3) of the lens is set on the vertical surface (S3) of the lens and close to the first surface (S1) of the lens; When the lens is installed in the lens barrel (1) from the second end of the lens barrel (1), the burr (3) of the lens is set on the vertical surface (S3) of the lens and close to the second surface (S2) of the lens; When the lens is installed in the lens barrel (1), the surface of the lens facing the first end of the lens barrel (1) is defined as a first surface (S1), and the surface of the lens facing the second end of the lens barrel (1) is defined as a second surface (S2); According to the set burr (3) position, the mold parting line layout is clarified; Manufacturing a lens by using a set mold; The manufactured lens is installed in the lens barrel (1) according to a predetermined installation direction, so that the lenses in the lens group are coaxial.

2. The lens assembly coaxial method according to claim 1, characterized in that: The installation direction of each lens in the lens barrel (1) specifically includes: The lens is installed in the lens barrel (1) from a first end of the lens barrel (1) along the axis of the lens barrel (1); or the lens is installed in the lens barrel (1) from a second end of the lens barrel (1) along the axis of the lens barrel (1).

3. The lens assembly coaxial method according to claim 1, characterized in that: Based on the set position of the burr (3), the mold parting line layout is clarified, including: When the burr edge (3) of the lens is set on the vertical surface (S3) of the lens and close to the second surface (S2) of the lens, the setting position of the parting line in the mold corresponds to the position of the vertical surface (S3) of the lens close to the second surface (S2) of the lens; When the burr (3) of the lens is set on the vertical surface (S3) of the lens and close to the first surface (S1) of the lens, the setting position of the parting line in the mold corresponds to the position of the vertical surface (S3) of the lens close to the first surface (S1) of the lens.

4. The lens assembly coaxial method according to claim 1, characterized in that: Before the manufactured lens is installed in the lens barrel (1) according to a predetermined installation direction, the method further includes: Based on the optical framework model and the position of the burr (3) set for each lens, a space-avoiding portion (4) corresponding to each burr (3) is formed in the lens barrel (1).

5. The lens assembly coaxial method according to claim 4, characterized in that: The air-avoiding portion (4) corresponding to each burr (3) is formed in the lens barrel (1) and specifically comprises: At least a portion of the inner wall of the lens barrel (1) is inclined away from the axis direction of the lens barrel (1) to form an inclined surface, and the area left by the inclined surface relative to the vertically arranged inner wall of the lens barrel (1) is the avoidance portion (4).

6. The lens assembly coaxial method according to claim 5, characterized in that: Along the inner diameter direction of the lens barrel (1), the maximum size range of the air-avoiding portion (4) is: 0.025mm~0.045mm.

7. The lens assembly coaxial method according to claim 1, characterized in that: In the optical architecture model, the outer diameters of two adjacent lenses are different, and the difference between the outer diameters of two adjacent lenses ranges from 0.4 mm to 0.6 mm.

8. The lens assembly coaxial method according to claim 7, characterized in that: Based on the optical architecture model, a step surface is also formed in the lens barrel (1), and the step surface is used to carry the lens.

9. A lens, characterized in that: The invention comprises a lens barrel (1) and a lens group, wherein the lens group comprises at least two lenses, and the lens group is installed in the lens barrel (1) by using the lens group coaxial method described in any one of claims 1 to 8.

10. The lens according to claim 9, wherein: A plurality of air-avoiding portions (4) are formed in the lens barrel (1), and the air-avoiding portions (4) correspond one-to-one to the burrs (3) of the lenses in the lens group.

Images