Lens coaxial method and lens

Abstract

The embodiment of the present application provides a lens coaxial method and a lens. The lens comprises a lens module and a screen module, and further comprises at least three adjusting assemblies; the lens module comprises a lens barrel and a lens group, and the screen module comprises a back cover and a screen; the lens coaxial method comprises the following steps: placing the lens group in the lens barrel, and coaxially arranging the lens group; fixing the screen on the back cover; pre-fixing the lens barrel and the back cover through the at least three adjusting assemblies; adjusting six degrees of freedom of the screen module by rotating at least one adjusting assembly, so that the screen module is coaxially arranged with the lens module.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of lenses, and more particularly, to 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 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 lens 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 the lens. 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 lens while reducing production costs and improving the market competitiveness of products has become a key problem that needs to be solved urgently. SUMMARY

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

[0006] In a first aspect, the present application provides a lens coaxial method. The lens includes a lens module and a screen module, and further includes at least three adjusting components; the lens module includes a lens barrel and a lens group, and the screen module includes a back cover and a screen; the lens coaxial method includes:

[0007] placing the lens group in the lens barrel, and coaxially arranging the lens group;

[0008] fixing the screen on the back cover;

[0009] pre-fixing the lens barrel and the back cover through the at least three adjusting components;

[0010] adjusting the six degrees of freedom of the screen module by rotating at least one adjusting component, so that the screen module is coaxially arranged with the lens module.

[0011] Optionally, the adjusting component includes an elastic part and a fastening part, the elastic part is sleeved outside the fastening part, and the fastening part penetrates through the back cover and the lens barrel;

[0012] adjusting the six degrees of freedom of the screen module by rotating at least one fastening part.

[0013] Optionally, the lens set comprises at least two lenses, and the lens set is coaxially arranged, specifically comprising:

[0014] According to the optical architecture model, the installation direction of each lens in the optical architecture model is determined;

[0015] According to the predetermined installation direction of each lens, the flash position of each lens is set;

[0016] According to the set flash position, the parting line layout of the mold is determined;

[0017] The lens is manufactured by the set mold;

[0018] The manufactured lens is installed in the lens barrel according to the predetermined installation direction, so that the lenses in the lens set are coaxial.

[0019] Optionally, the lenses in the lens set are processed by CNC processing.

[0020] Optionally, the screen is fixed to the rear cover, specifically comprising:

[0021] An adhesive layer is arranged between the screen and the rear cover, and the screen is adhered to the rear cover.

[0022] Optionally, the lens barrel and the rear cover are pre-fixed by at least three adjusting assemblies, specifically comprising:

[0023] The first side wall of the rear cover and the first inner side wall of the lens barrel have a first gap in the radial direction of the lens.

[0024] Optionally, the lens barrel and the rear cover are pre-fixed by at least three adjusting assemblies, specifically comprising:

[0025] The second side wall of the rear cover and the second inner side wall of the lens barrel have a second gap in the axial direction of the lens barrel, and the adjusting assembly pre-fixes the lens barrel and the rear cover, and the adjusting assembly protrudes a preset length relative to the lens barrel.

[0026] Optionally, the size of the first gap ranges from 0.2mm to 0.5mm.

[0027] Optionally, the size of the second gap ranges from 1mm to 1.5mm, and / or the preset length ranges from 4mm to 5mm.

[0028] Optionally, the six degrees of freedom of the screen module are adjusted by rotating at least one adjusting assembly, specifically comprising:

[0029] Based on the screen display picture position and picture quality, at least one of the adjusting components is correspondingly rotated to adjust six degrees of freedom of the screen module.

[0030] In a second aspect, the embodiments of the present application provide a lens. The lens comprises a lens module and a screen module, and the lens adopts the lens coaxial method in the first aspect to coaxially arrange the lens module and the screen module.

[0031] Optionally, at least three of the adjusting components are connected to the lens barrel and the rear cover; the adjusting component comprises an elastic component and a fastening component, the elastic component is sleeved outside the fastening component, and the fastening component penetrates through the rear cover and the lens barrel.

[0032] According to the embodiments of the present application, the screen module and the lens module are coaxial by rotating the adjusting component, that is, the screen module and the lens module are coaxial completely by structural design, which can reduce the cost and improve the product competitiveness.

[0033] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description, serve to explain the principles of the present application.

[0035] Figure 1 A flow chart of a lens coaxial method provided by the embodiments of the present application is shown.

[0036] Figure 2 A structural schematic diagram of a lens provided by the embodiments of the present application is shown.

[0037] Figure 3 A sectional view of a lens provided by the embodiments of the present application is shown.

[0038] Figure 4 A structural method diagram in the middle A is shown. Figure 3 A structural method diagram in the middle A is shown.

[0039] Figure 5 A flow chart of a lens coaxial method provided by the embodiments of the present application is shown.

[0040] Figure 6 A structural exploded view of another lens module provided by the embodiments of the present application is shown.

[0041] Figure 7 A structural method diagram in the middle A is shown. Figure 6 A structural method diagram in the middle A is shown.

[0042] Figures 8a-8cAs shown in Figure 7 Enlarged view of the structure at B, C and D.

[0043] Figure 9 As shown in Figure 6 Cross-sectional view of the lens module Figure 1 .

[0044] Figures 10a-10c As shown in Figure 9 Enlarged view of the structure at G, F and H.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] 10, lens barrel; 11, rear cover; 12, screen; 13, upper cover; 14, dustproof sponge; 15, adhesive layer; 16, adjusting assembly; 161, elastic part; 162, fastening part;

[0047] 21, first lens; 22, second lens; 23, third lens; 24, spacer ring;

[0048] S1, first surface; S2, second surface; S3, vertical surface;

[0049] 3, burr; 4, clearance; 51, first inclined surface; 52, second inclined surface; 53, third inclined surface. DETAILED DESCRIPTION

[0050] 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 specifically stated otherwise.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] It should be noted that like numbers and letters refer to like items throughout the drawings, and that, once an item is defined in one drawing, it should not require further discussion in subsequent drawings.

[0055] The embodiment of the present application provides a lens coaxial method. The lens comprises a lens module and a screen module, and the lens coaxial method aims to ensure that the lens module and the screen module can be coaxially aligned accurately.

[0056] With reference to Figure 2 , the lens is composed of the lens module, the screen module and at least three adjusting assemblies 16. The lens module comprises a lens barrel 10 and a lens group, and the lens group is arranged in the lens barrel 10. The screen module comprises a back cover 11 and a screen 12, and the screen 12 is fixed on the back cover 11. The relative positions of the back cover 11 and the lens barrel 10 are adjusted by the at least three adjusting assemblies 16, so that the lens module and the screen module can be coaxially aligned accurately.

[0057] Specifically, with reference to Figure 1 , the lens coaxial method mainly comprises steps S1-S4.

[0058] S1: placing the lens group in the lens barrel 10, and coaxially arranging the lens group;

[0059] S2: fixing the screen 12 on the back cover 11;

[0060] S3: pre-fixing the lens barrel 10 and the back cover 11 by the at least three adjusting assemblies 16;

[0061] S4: adjusting six degrees of freedom of the screen module by rotating at least one adjusting assembly 16, so that the screen module is coaxially arranged with the lens module.

[0062] In step S1, the lens group is installed in the lens barrel 10, and it is ensured that the lens group is coaxially arranged with the lens barrel 10. This step is the basis of lens coaxial adjustment, and is directly related to the smooth progress of the subsequent steps.

[0063] Wherein, how to ensure the coaxial arrangement of the lens group is the key of this step. Two ways are introduced below to ensure the coaxial arrangement of the lens group.

[0064] Way one:

[0065] In a specific embodiment, with reference to Figure 5 , in the case that the lens group comprises at least two lenses, the coaxial arrangement of the lens group specifically comprises steps S11-S15.

[0066] S11: determining the installation direction of each lens in the optical architecture model according to the optical architecture model;

[0067] S12: setting the burr position of each lens according to the pre-determined installation direction of each lens;

[0068] S13: Determine the parting line layout of the mold according to the set edge position;

[0069] S14: Manufacture the lens by the set mold;

[0070] S15: Install the manufactured lens in the lens barrel 10 according to the predetermined installation direction, so that the lenses in the lens group are coaxial.

[0071] In step S11, the optimal installation direction of each lens in the lens barrel 10 is determined according to the optical architecture model.

[0072] Specifically, the optical architecture model (which can be an optical architecture diagram) generally includes the geometric shapes, material properties, and relative positions and arrangements of optical elements (such as lenses, mirrors, etc.). Figure 2 The optical architecture model can be an optical architecture diagram and Figure 6 The optical architecture model can be an optical architecture diagram) facilitates the user to optimize the performance of the optical system to meet specific imaging requirements.

[0073] After the optical architecture model is determined, the number of lenses in the lens barrel 10 is also determined. Based on the specific parameters such as the number of lenses to be installed and the depth of the lens barrel 10, we can pre-plan and set the installation direction of each lens in the lens barrel 10. For example, referring to Figure 2 and Figure 6 , the number of lenses in the lens barrel 10 is 3.

[0074] When the depth of the lens barrel 10 is large, the inner diameter of the lens barrel 10 is relatively small, and a large number of lenses need to be installed, the lenses in the optical architecture model cannot be simply installed in the lens barrel 10 in 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 from different sides of the lens barrel 10 to adapt to the space limitation and ensure the correct alignment and cooperation between the lenses. For example, the lens barrel 10 is a hollow cylindrical structure with two open ends.

[0075] In a specific embodiment, referring to Figure 2 , Figure 6 and Figure 9 , the installation direction of each lens in the lens barrel 10 specifically includes:

[0076] The lens is installed in the lens barrel 10 along the axis of the lens barrel 10 from the first end of the lens barrel 10; or the lens is installed in the lens barrel 10 along the axis of the lens barrel 10 from the second end of the lens barrel 10.

[0077] For example, referring to Figure 9In the case of vertical placement of the lens barrel 10 (the axis of the lens barrel 10 is vertically arranged), a part of the lenses needs to be installed in the lens barrel 10 from the upper end of the lens barrel 10 (i.e., the lenses are installed from top to bottom), and another part of the lenses needs to be installed in the lens barrel 10 from the lower end of the lens barrel 10 (i.e., the lenses are installed from bottom to top).

[0078] With reference to Figure 9 , three lenses are installed in the lens barrel 10, which specifically include: the first lens 21, the second lens 22, and the third lens 23. The outer diameter size of the first lens 21, the second lens 22, and the third lens 23 is limited in combination with the internal structure of the lens barrel 10. The first lens 21 is installed in the lens barrel 10 from the lower end of the lens barrel 10. The second lens 22 is installed in the lens barrel 10 from the upper end of the lens barrel 10, and after the installation of the second lens 22, the third lens 23 is installed in the lens barrel 10 from the upper end of the lens barrel 10.

[0079] Exemplarily, with reference to Figure 2 and Figure 6 , in the case of horizontal placement of the lens barrel 10 (the axis of the lens barrel 10 is horizontally arranged), a part of the lenses needs to be installed in the lens barrel 10 from the left end of the lens barrel 10, and another part of the lenses needs to be installed in the lens barrel 10 from the right end of the lens barrel 10.

[0080] With reference to Figure 2 and Figure 6 , three lenses are installed in the lens barrel 10, which specifically include: the first lens 21, the second lens 22, and the third lens 23. The outer diameter size of the first lens 21, the second lens 22, and the third lens 23 is limited in combination with the internal structure of the lens barrel 10. The first lens 21 is installed in the lens barrel 10 from the right end of the lens barrel 10. The second lens 22 is installed in the lens barrel 10 from the left end of the lens barrel 10, and after the installation of the second lens 22, the third lens 23 is installed in the lens barrel 10 from the left end of the lens barrel 10.

[0081] Exemplarily, with reference to Figure 2 and Figure 6 , a spacer ring 24 is further arranged between the second lens 22 and the third lens 23.

[0082] In step S12, 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.

[0083] Specifically, during the processing of the lens, it is difficult to avoid the generation of burr 3 on the edge of the lens if the lens is not processed by CNC machining. Therefore, in this step, according to the predetermined installation direction of each lens, the specific position of the burr 3 on the lens is accurately planned in advance. This pre-set strategy ensures that the subsequently manufactured lenses can form burrs 3 at the specified position. When these manufactured lenses are assembled into the lens barrel 10 according to the pre-planned installation direction, the adverse effects of burr 3 on the coaxiality of the lens group can be effectively avoided, thereby ensuring the overall performance and accuracy of the optical system.

[0084] In a specific embodiment, with reference to Figure 7 and Figures 8a-8c , the setting of the burr 3 position of each lens according to the predetermined installation direction of each lens specifically includes:

[0085] When the installation direction of the lens is from the first end of the lens barrel 10 to the inside of the lens barrel 10, 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;

[0086] When the installation direction of the lens is from the second end of the lens barrel 10 to the inside of the lens barrel 10, 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;

[0087] Wherein when the lens is installed in the lens barrel 10, the surface of the lens facing the first end of the lens barrel 10 is defined as the first surface S1, and the surface of the lens facing the second end of the lens barrel 10 is defined as the second surface S2.

[0088] In short, no matter whether the lens is installed from the first end or the second end of the lens barrel 10, as long as it is installed in the pre-set direction, the side of the lens close to the burr 3 always enters the lens barrel 10 last. Since the size of the burr 3 is usually more than 0.05mm, there is almost no need to worry about the interference of the size of the burr 3 during installation. Such design effectively avoids the adverse effects of burr 3 on the coaxiality of the lens group, thereby ensuring that the overall performance and accuracy of the optical system remain at a high level.

[0089] Through such setting, when the lens is installed inside the lens barrel 10, 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 treatment further improves the overall performance and stability of the optical system.

[0090] Exemplarily, with reference to Figure 7 and Figures 8a-8cThe 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 10 from the right end of the lens barrel 10. The second lens 22 is installed in the lens barrel 10 from the left end of the lens barrel 10. The third lens 23 is installed in the lens barrel 10 from the left end of the lens barrel 10 after the second lens 22 is installed.

[0091] Referring to Figure 8c For the first lens 21, the lens burr 3 is set to be located at a lower position of the lens face S3.

[0092] Referring to Figure 8b For the second lens 22, the lens burr 3 is set to be located at an upper position of the lens face S3.

[0093] Referring to Figure 8a For the third lens 23, the lens burr 3 is set to be located at an upper position of the lens face S3.

[0094] In step S13, the parting line layout of the mold is determined according to the set lens burr 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 lens burr 3 of each lens is located at the predetermined position of the lens.

[0095] 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 burr 3 is likely to occur. Generally speaking, the design position of the mold parting line is highly consistent with the position of the lens burr 3. In short, if the parting line is located at a certain position of the mold, then the lens is most likely to form a lens burr 3 at the corresponding position.

[0096] In a specific embodiment, the parting line layout of the mold is determined according to the set lens burr 3 position, which specifically includes:

[0097] When the lens burr 3 of the lens is set to be located at the lens face 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 face S3 close to the second surface S2 of the lens.

[0098] When the lens burr 3 of the lens is set to be located at the lens face 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 face S3 close to the first surface S1 of the lens.

[0099] Specifically, if the design requirement is to control the lens' s flash 3 at the surface S3, and these flashes 3 need to be close to the lens' s second surface S2, the mold' s parting line should be precisely set at the position corresponding to the lens' s 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 material overflow during injection molding meets the design requirements.

[0100] On the contrary, if the design requirement is to control the lens' s flash 3 at the surface S3, but requires these flashes 3 to be close to the lens' s first surface S1, the mold' s parting line should be precisely set at the position corresponding to the lens' s 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 material overflow during injection molding will be strictly controlled within the design range.

[0101] In step S14, 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.

[0102] In step S15, the manufactured lens is installed into the lens barrel 10 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.

[0103] Therefore, in step S15, 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 10 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 10 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.

[0104] Method two: In another specific embodiment, the lenses in the lens group are processed by CNC machining.

[0105] When all lenses in the lens group are processed by CNC (Computer Numerical Control Precision Machining) processing method, the lens does not have burrs. In the case that the lens does not have burrs, by controlling the inner diameter size of the first lens 21 and the lens barrel 10, the coaxiality of the first lens 21 and the lens barrel 10 is limited. In the case that the lens barrel 10 does not have a step design and the lens does not have burrs, by controlling the size of the second lens 22, the third lens 23, the spacer ring 24 and the inner diameter size of the lens barrel 10, the coaxiality of the second lens 22, the third lens 23 and the lens barrel 10 is limited.

[0106] Exemplarily, in the case that the lens also includes an upper cover 13, the dustproof sponge 14 is bonded to the upper cover 13, and by controlling the size of the lens barrel 10 and the upper cover 13 and the fitting size (thread size or buckle size) of the lens barrel 10 and the upper cover 13, the upper cover 13 and the lens barrel 10 are fitted, which plays a sealing role for the lens.

[0107] In step S2, the screen 12 is stably mounted on the back cover 11, which ensures the basic structure of the screen module and provides stable support for subsequent coaxial adjustment.

[0108] In one specific embodiment, referring to Figure 2 The screen 12 is fixed to the back cover 11, specifically including: an adhesive layer 15 is arranged between the screen 12 and the back cover 11, and the screen 12 is bonded to the back cover 11.

[0109] Specifically, an adhesive layer 15 is arranged between the screen 12 and the back cover 11. The adhesive layer 15 not only ensures the close fit between the screen 12 and the back cover 11, but also provides necessary structural strength and stability.

[0110] In particular, when the screen 12 is fixed to the back cover 11 by bonding, the geometric center of the screen 12 can overlap the geometric center of the back cover 11. This greatly facilitates the coaxial arrangement between the screen module and the lens module when the coaxiality of the screen module and the lens module is adjusted by the adjusting assembly 16 in the subsequent step.

[0111] In step S3, at least three adjusting assemblies 16 are used to preliminarily fix the lens barrel 10 and the back cover 11. This provides necessary stability for subsequent coaxial adjustment.

[0112] Specifically, the preliminary fixing process of the lens barrel 10 and the back cover 11 is realized by at least three adjusting assemblies 16, specifically, each adjusting assembly 16 penetrates the back cover 11 and extends to the inside of the lens barrel 10, but at this stage, these adjusting assemblies 16 do not exert enough fastening force to completely lock the back cover 11 and the lens barrel 10, but maintain an adjustable, non-completely fastened state.

[0113] Referring toFigure 3 and Figure 4 Pre-fixing the lens barrel 10 and the rear cover 11 by at least three adjusting assemblies 16 specifically includes:

[0114] The first side wall of the rear cover 11 and the first inner side wall of the lens barrel 10 have a first gap L1 in the radial direction of the lens, and the first gap L1 ensures sufficient adjusting position and rotation allowance of the screen module in the XY (in-plane) direction, so as to facilitate subsequent adjustment and calibration.

[0115] The second side wall of the rear cover 11 and the second inner side wall of the lens barrel 10 have a second gap in the axial direction of the lens barrel 10, and the adjusting assembly 16 pre-fixes the lens barrel 10 and the rear cover 11, and the adjusting assembly 16 protrudes a preset length relative to the lens barrel 10. The second gap L2 and the preset length are set to ensure sufficient adjusting position and rotation allowance of the screen module in the Z direction (vertical direction), so as to facilitate subsequent adjustment and calibration.

[0116] Further, referring to Figure 4 , the size of the first gap L1 ranges from 0.2 mm to 0.5 mm. Further, referring to Figure 4 , the size of the second gap L2 ranges from 1 mm to 1.5 mm, and / or the preset length ranges from 4 mm to 5 mm.

[0117] Referring to Figure 4 , the lens barrel 10 and the rear cover 11 are installed together by the adjusting assembly 16, and the rear cover 11 is embedded in the lens barrel 10. When the rear cover 11 is embedded in the lens barrel 10, the rear cover 11 and the lens barrel 10 have a first gap L1 in the radial direction of the lens, and the size of the first gap L1 ranges from 0.2 mm to 0.5 mm.

[0118] After the lens barrel 10 and the rear cover 11 are pre-fixed by the adjusting assembly 16, when at least one adjusting assembly 16 is rotated to realize coaxial arrangement of the lens module and the screen module, the screen module can be adjusted in the X direction and / or the Y direction due to the first gap L1, so as to realize coaxial arrangement of the screen module and the lens module by adjusting the position of the screen module. Exemplarily, the size of the first gap L1 is 0.4 mm.

[0119] Referring to Figure 4, the lens barrel 10 and the rear cover 11 are fixed together by the adjusting assembly 16, and the rear cover 11 is embedded in the lens barrel 10. When the rear cover 11 is embedded in the lens barrel 10, the rear cover 11 and the lens barrel 10 have a second gap L2 in the axial direction of the lens, and the size of the second gap L2 is in the range of 1mm to 1.5mm. After the lens barrel 10 and the rear cover 11 are pre-fixed by the adjusting assembly 16, when the lens module and the screen module are coaxial, the screen module can be adjusted in the Z direction to achieve the coaxiality of the screen module and the lens module by rotating at least one adjusting assembly 16. For example, the size of the second gap L2 is 1.1mm.

[0120] Referring to Figure 4 , the lens barrel 10 and the rear cover 11 are fixed together by the adjusting assembly 16, and at least part of the adjusting assembly 16 is protruded out of the lens barrel 10. For example, the pre-set length of the protrusion of the adjusting assembly 16 relative to the lens barrel 10 can be defined by limiting the length L3 of the fastening component 162 in the adjusting assembly 16 and the distance L4 between the surface of the rear cover 11 away from the lens barrel 10 and the surface of the lens barrel 10 away from the rear cover 11.

[0121] After the lens barrel 10 and the rear cover 11 are pre-fixed by the adjusting assembly 16, when the lens module and the screen module are coaxial, the screen module can be adjusted in the Z direction to achieve the coaxiality of the screen module and the lens module by rotating at least one adjusting assembly 16, because at least part of the adjusting component is protruded out of the lens barrel 10.

[0122] In step S4, the six degrees of freedom (including three translational degrees of freedom and three rotational degrees of freedom) of the screen module can be flexibly adjusted by rotating at least one adjusting assembly 16. Through this adjustment process, the coaxiality of the screen module and the lens module can be ensured, thereby meeting the high-precision assembly requirements of the lens.

[0123] For example, the lens includes at least three adjusting assemblies 16. When the lens includes three adjusting assemblies 16, the three adjusting assemblies 16 are arranged in a triangular shape. When the lens includes four adjusting assemblies 16, the four adjusting assemblies 16 are arranged in a rectangular shape. Or when the lens includes more adjusting assemblies 16, the adjusting assemblies 16 can be arranged in a circular or elliptical shape.

[0124] When the structure of the adjusting assembly 16 is only the fastening component 162 (for example, a screw column), and the plurality of fastening components 162 are all installed in the same direction (referring to Figure 3 and Figure 4 , the adjusting assembly 16 is installed in the axial direction of the lens), the six degrees of freedom adjustment can also be achieved by the cooperation between the fastening components 162.

[0125] For example, by installing fastening components 162 at different positions and adjusting their relative positions, the translation of the screen module in the X and Y directions and the rotation of the screen module around the X and Y axes can be indirectly achieved to realize the coaxial arrangement of the screen module and the lens module.

[0126] Exemplarily, elastic components 161 (such as springs, elastic sheets, etc.) can also be used to connect the screen module and the adjusting assembly 16. By rotating the adjusting assembly 16, the elastic components 161 can produce elastic deformation, which can be converted into the translation of the screen module in the X and Y directions or the rotation of the screen module around the X and Y axes.

[0127] In a specific embodiment, referring to Figure 2 , the adjusting assembly 16 includes elastic components 161 and fastening components 162, the elastic components 161 are sleeved outside the fastening components 162, and the fastening components 162 penetrate the rear cover 11 and the lens barrel 10; the six degrees of freedom of the screen module are adjusted by rotating at least one of the fastening components 162.

[0128] In this embodiment, after the adjusting assembly 16 pre-fixes the lens barrel 10 and the rear cover 11, by adjusting the relative positions of the fastening components 162, the elastic components 161 sleeved outside them will produce elastic deformation accordingly. This elastic component 161 deformation and the adjustment of the relative positions of the fastening components 162 work together to realize the flexible movement of the screen module with six degrees of freedom. Specifically, this adjustment allows the position of the screen module to be changed, thereby ensuring that it is coaxially arranged with the lens module in a visual and physical manner.

[0129] Further, when the screen module and the lens module are coaxially arranged by the adjusting assembly 16, the six degrees of freedom of the screen module are adjusted by rotating at least one of the adjusting assemblies 16 according to the position of the screen 12 display picture and the quality of the picture.

[0130] For example, in the process of realizing the coaxial arrangement of the screen module and the lens module, the position of the screen 12 display picture and the quality of the picture are mainly relied on. According to these parameters, at least one of the adjusting assemblies 16 is rotated to accurately adjust the six degrees of freedom of the screen module.

[0131] Specifically, this can be done with the help of an external detection device. This device can detect the position of the screen 12 display picture and the quality of the picture, thereby helping us to determine which position of the adjusting assembly 16 needs to be rotated to make necessary adjustments to the screen module.

[0132] Therefore, in this embodiment, the screen module and the lens module are coaxial by rotating the adjusting assembly 16, that is, the coaxiality of the screen module and the lens module is achieved entirely by structural design, which can reduce the cost and improve the product competitiveness.

[0133] In an optional embodiment, in the above series of steps, before the manufactured lenses are mounted in the lens barrel 10 according to the predetermined mounting direction, the following step is further included: Figure 9 Figures 10a-10c

[0134] 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 10.

[0135] In this embodiment, in order to ensure that the manufactured lenses can be mounted in the lens barrel 10 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 10.

[0136] Specifically, the existence of the clearance 4 provides additional space for the flash 3 of the lens, avoiding damage to the lens or deviation of the mounting position during the installation process due to friction or collision between the flash 3 and the inner wall of the lens barrel 10, which affects the coaxiality of the lens group. Even if there is a certain tolerance range in the size of the flash 3 of the lens during the installation process, the clearance 4 can provide enough space to accommodate these differences, thereby ensuring that the lens can be installed in place.

[0137] For example, through the optical architecture model, the size and position of the clearance 4 required for each lens during installation can be calculated to ensure that the clearance 4 can meet the needs of lens installation and will not have a negative impact on the overall optical performance of the lens.

[0138] Further, forming the clearance 4 corresponding to each flash 3 in the lens barrel 10 specifically includes: at least a portion of the inner wall of the lens barrel 10 is inclined to form a slope away from the axis direction of the lens barrel 10, and the area avoided by the slope relative to the vertically arranged inner wall of the lens barrel 10 is the clearance 4.

[0139] Specifically, at least a portion of the inner wall of the lens barrel 10 is designed as a slope inclined away from the axis direction of the lens barrel 10. 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.

[0140] Specifically, the slope relative to the vertically arranged inner wall of the lens barrel 10 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.​​

[0141] In addition, the inclined surface design also plays a guiding role, facilitating the installation of the lens. During installation, the lens can be smoothly slid into the predetermined position along the inclined surface, reducing the difficulty and time of installation.

[0142] Exemplarily, referring to Figure 10c Corresponding 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 10, and the area avoided by the first inclined surface 51 is the clearance 4, and the burr 3 is located in the clearance 4.

[0143] Exemplarily, referring to Figure 10b 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 10, and the area avoided by the second inclined surface 52 is the clearance 4, and the burr 3 is located in the clearance 4.

[0144] Exemplarily, referring to Figure 10a 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 10, and the area avoided by the third inclined surface 53 is the clearance 4, and the burr 3 is located in the clearance 4.

[0145] The embodiment of the present application also provides a lens. The lens comprises a lens module and a screen module, and the lens adopts the lens coaxial method as described above to coaxially arrange the lens module and the screen module. In this embodiment, the lens adopts the method as described above to coaxially arrange the lens module and the screen module, thereby guaranteeing the imaging quality and optical stability of the lens. In addition, this method of coaxially arranging the screen module and the lens module through structure design can reduce the cost and improve the product competitiveness.

[0146] In one embodiment, referring to Figure 2 At least three adjustment assemblies 16 are connected to the lens barrel 10 and the rear cover 11; the adjustment assembly 16 comprises an elastic component 161 and a fastening component 162, the elastic component 161 is sleeved outside the fastening component 162, and the fastening component 162 penetrates through the rear cover 11 and the lens barrel 10.

[0147] In this embodiment, the structure of the adjustment assembly 16 is defined, and after the adjustment assembly 16 is used to coaxially arrange the screen module and the lens module, the adjustment assembly 16 is also used to fasten the screen module and the lens module, so that the screen module and the lens module are fastened and connected.

[0148] The difference between the embodiments is mainly described above, and the optimization features different from each other can be combined to form a better embodiment as long as they are not contradictory. Considering the brevity of the writing, it will not be repeated here.

[0149] While certain embodiments of the application have been described herein in detail, those skilled in the art will appreciate that modifications can be made without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims

1. A lens coaxial method, characterized in that: The lens comprises a lens module and a screen module, and the lens further comprises at least three adjustment components (16); the lens module comprises a lens barrel (10) and a lens group, and the screen module comprises a back cover (11) and a screen (12); the lens coaxial method comprises: The lens group is placed in the lens barrel (10), and the lens group is coaxially arranged; the lens group includes at least two lenses, and the coaxial arrangement of the lens group specifically includes: According to the optical architecture model, determining the installation direction of each lens in the optical architecture model in the lens barrel (10); Setting the position of the burr (3) of each lens according to the predetermined installation direction of each lens; Wherein, according to the predetermined installation direction of each lens, setting the position of the burr (3) of each lens specifically includes: When the lens is installed in the lens barrel (10) from the first end of the lens barrel (10), 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 (10) from the second end of the lens barrel (10), 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 (10), the surface of the lens facing the first end of the lens barrel (10) is defined as a first surface (S1), and the surface of the lens facing the second end of the lens barrel (10) 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; Installing the manufactured lens in the lens barrel (10) according to a predetermined installation direction so that the lenses in the lens group are coaxial; Fixing the screen (12) on the back cover (11); Pre-fixing the lens barrel (10) and the back cover (11) by means of at least three adjustment assemblies (16); The six degrees of freedom of the screen module are adjusted by rotating at least one of the adjustment components (16) so that the screen module and the lens module are coaxially arranged.

2. The lens coaxial method according to claim 1, characterized in that: The adjustment assembly (16) comprises an elastic component (161) and a fastening component (162), wherein the elastic component (161) is sleeved outside the fastening component (162), and the fastening component (162) passes through the rear cover (11) and the lens barrel (10); The six degrees of freedom of the screen module are adjusted by rotating at least one of the fastening components (162).

3. The lens coaxial method according to claim 1, characterized in that: Fixing the screen (12) on the back cover (11) specifically includes: An adhesive layer is provided between the screen (12) and the back cover (11), and the screen (12) is adhered to the back cover (11).

4. The lens coaxial method according to claim 1, characterized in that: Pre-fixing the lens barrel (10) and the rear cover (11) by at least three of the adjustment assemblies (16) specifically includes: There is a first gap between the first side wall of the rear cover (11) and the first inner side wall of the lens barrel (10) in the radial direction of the lens.

5. The lens coaxial method according to claim 4, characterized in that: Pre-fixing the lens barrel (10) and the rear cover (11) by means of at least three adjustment assemblies (16) further specifically includes: A second gap exists between the second side wall of the rear cover (11) and the second inner side wall of the lens barrel (10) in the axial direction of the lens barrel (10), and the adjustment component (16) pre-fixes the lens barrel (10) and the rear cover (11), and the adjustment component (16) extends to a preset length relative to the lens barrel (10).

6. The lens coaxial method according to claim 5, characterized in that: The size range of the first gap is: 0.2mm~0.5mm.

7. The lens coaxial method according to claim 5, characterized in that: The size range of the second gap is: 1mm~1.5mm, and / or the preset length range is: 4mm~5mm.

8. The lens coaxial method according to claim 1, characterized in that: Adjusting the six degrees of freedom of the screen module by rotating at least one of the adjustment components (16) specifically includes: Based on the position and quality of the image displayed on the screen (12), at least one of the adjustment components (16) is rotated accordingly to adjust the six degrees of freedom of the screen module.

9. A lens, characterized in that: The lens comprises a lens module and a screen module, and the lens adopts the lens coaxial method as described in any one of claims 1 to 8 to enable the lens module and the screen module to be coaxially arranged.

10. The lens according to claim 9, wherein: At least three adjusting components (16) are connected to the lens barrel (10) and the rear cover (11); the adjusting components (16) include an elastic component (161) and a fastening component (162), the elastic component (161) is sleeved outside the fastening component (162), and the fastening component (162) passes through the rear cover (11) and the lens barrel (10).

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