Lens coaxial method and lens

Abstract

The embodiment of the invention 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 cone and a lens group, and the screen module comprises a rear cover and a screen; the lens coaxial method comprises the following steps: placing the lens group in the lens barrel, wherein the lens group is coaxially arranged; the screen is fixed on the rear cover; the lens cone and the rear cover are pre-fixed through the at least three adjusting assemblies; the six degrees of freedom of the screen module are adjusted by rotating at least one adjusting assembly, so that the screen module and the lens module are coaxially arranged.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of lens technology, and more specifically, the embodiments of the present application relate to a. Background Art

[0002] With the increasing popularity of electronic devices such as virtual reality (VR) and augmented reality (AR), the frequency of use of projection lenses is increasing significantly. In this context, ensuring the coaxiality of the projection lens has become extremely important, as it is directly related to the imaging quality and user experience of the device. 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 projection lenses.

[0003] Currently, visual guidance equipment is mainly used to ensure the coaxiality of the lens. However, this method requires the introduction of a large number of auxiliary equipment, which increases production costs. The high cost leads to a decline in the market competitiveness of the product, and consumers' willingness to buy it also weakens.

[0004] Therefore, how to reduce production costs and improve product market competitiveness while ensuring the coaxiality of the lens has become a key issue that needs to be solved urgently. Summary of the invention

[0005] The purpose of this application is to provide a lens coaxial method and a new lens technology solution.

[0006] In a first aspect, the present application provides a lens coaxial method. The lens includes a lens module and a screen module, and the lens also includes at least three adjustment 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, wherein the lens group is coaxially arranged;

[0008] Fixing the screen on the back cover;

[0009] Pre-fixing the lens barrel and the rear cover by at least three of the adjustment components;

[0010] The six degrees of freedom of the screen module are adjusted by rotating at least one of the adjustment components so that the screen module and the lens module are coaxially arranged.

[0011] Optionally, the adjustment assembly includes an elastic component and a fastening component, the elastic component is sleeved outside the fastening component, and the fastening component passes through the rear cover and the lens barrel;

[0012] The six degrees of freedom of the screen module are adjusted by rotating at least one of the fastening components.

[0013] Optionally, the lens group includes at least two lenses, and the coaxial arrangement of the lens group specifically includes:

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

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

[0016] According to the set burr position, clarify the parting line layout of the mold;

[0017] Manufacturing a lens by using a set mold;

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

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

[0020] Optionally, fixing the screen on the back cover specifically includes:

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

[0022] Optionally, pre-fixing the lens barrel and the rear cover by using at least three adjustment components specifically includes:

[0023] A first gap exists between the first side wall of the rear cover and the first inner side wall of the lens barrel in the radial direction of the lens.

[0024] Optionally, pre-fixing the lens barrel and the rear cover by using at least three adjustment components further specifically includes:

[0025] A second gap exists between the second side wall of the rear cover and the second inner side wall of the lens barrel 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 extends out of the lens barrel by a preset length.

[0026] Optionally, the size range of the first gap is: 0.2mm~0.5mm.

[0027] Optionally, the size range of the second gap is: 1mm~1.5mm, and / or the preset length range is: 4mm~5mm.

[0028] Optionally, adjusting the six degrees of freedom of the screen module by rotating at least one of the adjustment components specifically includes:

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

[0030] In a second aspect, an embodiment of the present application provides a lens, which includes a lens module and a screen module, and the lens adopts the lens coaxial method as described in the first aspect to make the lens module and the screen module coaxially arranged.

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

[0032] According to the embodiments of the present application, the coaxiality of the screen module and the lens module is achieved by rotating the adjustment component, that is, the coaxiality of the screen module and the lens module is achieved entirely through structural design, which can reduce costs and improve product competitiveness.

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

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

[0035] Figure 1 Shown is a flow chart of the lens coaxial method provided in an embodiment of the present application.

[0036] Figure 2 Shown is a schematic diagram of the structure of a lens provided in an embodiment of the present application.

[0037] Figure 3 Shown is a cross-sectional view of a lens provided in an embodiment of the present application.

[0038] Figure 4 Shown Figure 3 Structural method diagram at A in the middle.

[0039] Figure 5 Shown is a flow chart of a lens assembly coaxial method provided in an embodiment of the present application.

[0040] Figure 6 Shown is a structural exploded view of another lens module provided in an embodiment of the present application.

[0041] Figure 7 Shown Figure 6 Schematic diagram of the structure of the lens.

[0042] Figure 8a-8cShown Figure 7 Enlarged view of the structures at B, C and D in the middle.

[0043] Fig. 9 Shown Figure 6 Cross-section of the middle lens module Figure 1 .

[0044] Figure 10a-Figure 10c Shown Fig. 9 Enlarged view of the structures at G, F and H in the middle.

[0045] Description of reference numerals:

[0046] 10. Lens barrel; 11. Back cover; 12. Screen; 13. Upper cover; 14. Dustproof sponge; 15. Adhesive layer; 16. Adjustment component; 161. Elastic component; 162. Fastening component;

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

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

[0049] 3. burr; 4. avoidance portion; 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 accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0051] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0052] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0053] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0054] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] The embodiment of the present application provides a lens coaxial method. The lens includes a lens module and a screen module. The lens coaxial method aims to ensure that the lens module and the screen module can achieve precise coaxial alignment.

[0056] Reference Figure 2 The lens is composed of a lens module, a screen module and at least three adjustment components 16. The lens module includes a lens barrel 10 and a lens group, and the lens group is arranged in the lens barrel 10. The screen module includes a rear cover 11 and a screen 12, and the screen 12 is fixed on the rear cover 11. The relative position of the rear cover 11 and the lens barrel 10 is adjusted by at least three adjustment components 16 to ensure that the lens module and the screen module can achieve precise coaxial alignment.

[0057] Specifically, refer to Figure 1 The lens coaxial method mainly includes steps S1 to S4.

[0058] S1: placing the lens group in the lens barrel 10, wherein the lens group is coaxially arranged;

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

[0060] S3: pre-fixing the lens barrel 10 and the rear cover 11 by using at least three adjustment components 16;

[0061] S4: adjusting the six degrees of freedom of the screen module by rotating at least one of the adjustment components 16 so that the screen module and the lens module are coaxially arranged.

[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 for the coaxial adjustment of the lens, and is directly related to the smooth progress of the subsequent steps.

[0063] How to ensure that the lens group is coaxial is the key to this step. The following two methods are introduced to ensure the coaxial setting of the lens group.

[0064] Method 1:

[0065] In a specific embodiment, referring to Figure 5 In the case where the lens group includes at least two lenses, the coaxial arrangement of the lens group specifically includes the following steps S11 to S15.

[0066] S11: According to the optical architecture model, determining the installation direction of each lens in the optical architecture model in the lens barrel 10;

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

[0068] S13: According to the set burr position, clarify the parting line layout of the mold;

[0069] S14: manufacturing a lens by using a set mold;

[0070] S15: 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.

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

[0072] Specifically, the optical architecture model ( Figure 2 The schematic diagram can be an optical architecture model diagram and Figure 6 The schematic diagram can also be an optical architecture model diagram) which usually includes the geometric shape, material properties, and relative positions and arrangements of optical elements (such as lenses, reflectors, etc.). The optical architecture module allows users 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 number of lenses to be installed and the depth of the lens barrel 10 and other specific parameters, we will pre-plan and set the installation direction of each lens in the lens barrel 10. 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 the number of lenses to be installed is large, the lenses in the optical architecture model cannot be simply installed one by one in a unified installation direction. In this case, in order to ensure that all lenses can be installed correctly and effectively, it is usually necessary to install them from different sides of the lens barrel 10 to adapt to space limitations and ensure correct alignment and matching between lenses. Exemplarily, the lens barrel 10 is a hollow cylindrical structure with openings at both ends.

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

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

[0077] For example, refer to Fig. 9When the lens barrel 10 is placed vertically (the axis of the lens barrel 10 is set vertically), some lenses need to be installed in the lens barrel 10 from the upper end of the lens barrel 10 (that is, the lenses are installed from top to bottom), and the other lenses need to be installed in the lens barrel 10 from the lower end of the lens barrel 10 (that is, the lenses are installed from bottom to top).

[0078] Reference Fig. 9 , three lenses are installed in the lens barrel 10, and the three lenses specifically include: a first lens 21, a second lens 22, and a third lens 23. The outer diameters 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 10, and 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 second lens 22 is installed, the third lens 23 is installed in the lens barrel 10 from the upper end of the lens barrel 10.

[0079] For example, refer to Figure 2 and Figure 6 When the lens barrel 10 is horizontally arranged (the axis of the lens barrel 10 is horizontally arranged), some lenses need to be installed in the lens barrel 10 from the left end of the lens barrel 10, and the other lenses need to be installed in the lens barrel 10 from the right end of the lens barrel 10.

[0080] Reference Figure 2 and Figure 6 , three lenses are installed in the lens barrel 10, and the three lenses specifically include: a first lens 21, a second lens 22, and a third lens 23. The outer diameters 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 10, and 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 second lens 22 is installed, the third lens 23 is installed in the lens barrel 10 from the left end of the lens barrel 10.

[0081] For example, refer to Figure 2 and Figure 6 A spacer ring 24 is further provided 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 lens can maintain coaxiality during the processing and installation process.

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

[0084] In a specific embodiment, referring to Figure 7 as well as Figure 8a-8c According to the predetermined installation direction of each lens, setting the position of the burr edge 3 of each lens specifically includes:

[0085] 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;

[0086] 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;

[0087] 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 .

[0088] In short, no matter 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 preset direction, the side of the lens close to the burr 3 will always enter the lens barrel 10 last. Since the size of the burr 3 is usually above 0.05 mm, there is almost no need to worry about the size of the burr 3 causing interference to the installation during the installation process. Such a 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.

[0089] By such a setting, when the lens is installed inside the lens barrel 10, no matter the lens enters from the first end or the second end, it can be ensured that the position of the burr 3 meets the installation requirements and does not adversely affect the coaxiality of the lens group. Such detail processing further improves the overall performance and stability of the optical system.

[0090] For example, refer to Figure 7 and Figure 8a-8c, three lenses are installed in the lens barrel 10, and the three lenses specifically include: a first lens 21, a second lens 22, and a third lens 23. The outer diameters 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 10, and 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 second lens 22 is installed, the third lens 23 is installed in the lens barrel 10 from the left end of the lens barrel 10.

[0091] Reference Figure 8c For the first lens 21, it is assumed that the burr 3 of the lens is located at the lower position of the lens vertical surface S3.

[0092] Reference Figure 8b For the second lens 22, it is assumed that the burr 3 of the lens is located at the upper position of the lens vertical surface S3.

[0093] Reference Figure 8a For the third lens 23, it is assumed that the burr 3 of the lens is located at the upper position of the lens vertical surface S3.

[0094] In step S13, the parting line layout of the mold is determined according to the set position of the lens burr 3. The parting line design of the mold needs to ensure that the lens can be molded according to the predetermined shape and size during the manufacturing process, and by clarifying the parting line layout of the mold, it is ensured that the burr 3 of each lens is located at the pre-set position of the lens.

[0095] Specifically, in the process of manufacturing lens molds, the position of the parting line plays a decisive role, and the parting line directly indicates the specific area where the burrs 3 on the lens may appear. Generally speaking, the design position of the mold parting line is highly consistent with the position where the burrs 3 on the lens are formed. In short, if the parting line is located at a certain position of the mold, then the lens is very likely to form burrs 3 at the corresponding position.

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

[0097] When 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, 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;

[0098] 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.

[0099] Specifically, if the design requirement is to control the burrs 3 of the lens to the facade S3, and these burrs 3 need to be close to the second surface S2 of the lens, the parting line of the mold should be precisely set at a position corresponding to the facade S3 of the lens 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 position of the burrs 3 on the lens, ensuring that the burrs 3 formed by the overflow of material during the injection molding process meet the design requirements.

[0100] On the contrary, if the design requirement is to control the burrs 3 of the lens to the facade S3, but require these burrs 3 to be close to the first surface S1 of the lens, then the parting line of the mold should be precisely set at a position corresponding to the facade S3 of the lens and close to the first surface S1. In this way, the position of the parting line is consistent with the desired position of the burrs 3 on the lens, and the burrs 3 formed by the overflow of the material 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 in the manufacturing process need to be strictly controlled to ensure the quality and accuracy of the lens.

[0102] In step S15, the manufactured lens is installed in the lens barrel 10 according to a predetermined installation direction. During the installation process, it is necessary to ensure that each lens can be accurately aligned to its predetermined position, so as to achieve the coaxiality of all lenses in the lens group.

[0103] Therefore, in the steps, 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, the installation direction of each lens in the lens barrel 10 is first clarified, and the burr 3 position of each lens is set accordingly. Subsequently, combined with the optimized mold design, the parting line layout of these molds closely corresponds to the preset burr 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 ensuring the imaging quality and optical stability of the lens group. In addition, this method of achieving the coaxiality of the lens group by means of structural definition (determination of the installation direction, determination of the burr position and setting of the mold) can reduce costs and enhance product competitiveness.

[0104] Method 2: In another specific embodiment, the lenses in the lens group are processed by CNC processing.

[0105] When all lenses in the lens group are processed by CNC (computer digital control precision machining), the lenses do not have burrs. In the case where the lenses do not have burrs, the coaxiality of the first lens 21 and the lens barrel 10 is limited by controlling the inner diameter size of the first lens 21 and the lens barrel 10. In the case where the lens barrel 10 does not have a step difference design and the lenses do not have burrs, the coaxiality of the second lens 22, the third lens 23, the spacer ring 24 and the inner diameter size of the lens barrel 10 is limited.

[0106] Exemplarily, when the lens also includes an upper cover 13, the dustproof sponge 14 is adhered to the upper cover 13, and by controlling the size of the lens barrel 10 and the upper cover 13, as well as the matching 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 matched to seal the lens.

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

[0108] In a specific embodiment, referring to Figure 2 Fixing the screen 12 on the back cover 11 specifically includes: providing an adhesive layer 15 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 provided between the screen 12 and the back cover 11. The adhesive layer 15 can not only ensure the close fit between the screen 12 and the back cover 11, but also provide 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 with the geometric center of the back cover 11. This greatly facilitates the coaxial setting between the screen module and the lens module when the coaxiality of the screen module and the lens module is subsequently adjusted by the adjustment component 16.

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

[0112] Specifically, the pre-fixing process of the lens barrel 10 and the rear cover 11 is achieved by at least three adjusting components 16, which specifically means that each adjusting component 16 penetrates the rear cover 11 and extends into the interior of the lens barrel 10, but at this stage, these adjusting components 16 do not apply sufficient tightening force to completely lock the rear cover 11 and the lens barrel 10, but maintain an adjustable, non-fully tightened state.

[0113] Reference Figure 3 and Figure 4 The method of pre-fixing the lens barrel 10 and the rear cover 11 by using at least three adjustment components 16 specifically includes:

[0114] There is a first gap L1 between the first side wall of the rear cover 11 and the first inner wall of the lens barrel 10 in the radial direction of the lens. The first gap L1 ensures that the screen module has sufficient adjustment position and rotation margin in the XY (in-plane) direction for subsequent adjustment and calibration work.

[0115] There is a second gap 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 assembly 16 pre-fixes the lens barrel 10 and the rear cover 11, and the adjustment assembly 16 extends out of the lens barrel 10 by a preset length. The second gap L2 and the preset length are set to ensure that the screen module has sufficient Z-direction (vertical direction) adjustment position and rotation margin for subsequent adjustment and calibration work.

[0116] Further, refer to Figure 4 , the size range of the first gap L1 is: 0.2mm~0.5mm. Further, referring to Figure 4 The size range of the second gap L2 is: 1mm~1.5mm, and / or the preset length range is: 4mm~5mm.

[0117] Reference Figure 4 The lens barrel 10 and the rear cover 11 are mounted together through the adjustment 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, there is a first gap L1 between the rear cover 11 and the lens barrel 10 in the radial direction of the lens, and the size range of the first gap L1 is: 0.2mm~0.5mm.

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

[0119] Reference Figure 4, the lens barrel 10 and the rear cover 11 are installed together through the adjustment component 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, there is a second gap L2 between the rear cover 11 and the lens barrel 10 in the axial direction of the lens, and the size range of the second gap L2 is: 1mm~1.5mm. After the lens barrel 10 and the rear cover 11 are pre-fixed by the adjustment component 16, when the lens module and the screen module are subsequently coaxial, due to the existence of the second gap L2, when rotating at least one adjustment component 16, the screen module can achieve freedom adjustment in the Z direction, so as to achieve the coaxiality of the screen module and the lens module by adjusting the position of the screen module. Exemplarily, the size of the second gap L2 is 1.1mm.

[0120] Reference Figure 4 The lens barrel 10 and the rear cover 11 are mounted together through the adjustment assembly 16, and at least a portion of the adjustment assembly 16 extends out of the lens barrel 10. For example, the preset length of the adjustment assembly 16 extending relative to the lens barrel 10 can be defined by defining the length L3 of the fastening component 162 in the adjustment assembly 16 and the distance L4 between the surface of the rear cover 11 facing away from the lens barrel 10 and the surface of the lens barrel 10 facing away from the rear cover 11.

[0121] After the lens barrel 10 and the rear cover 11 are pre-fixed by the adjustment assembly 16, when the lens module and the screen module are subsequently coaxial, since at least part of the adjustment component extends out of the lens barrel 10, when at least one adjustment assembly 16 is rotated, the screen module can be freely adjusted in the Z direction, so that the screen module and the lens module can be coaxial by adjusting the position of the screen module.

[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 adjustment component 16. Through this adjustment process, it is possible to ensure that the screen module and the lens module are coaxially arranged, thereby meeting the high-precision assembly requirements of the lens.

[0123] Exemplarily, the lens includes at least three adjustment components 16. When the lens includes three adjustment components 16, the three adjustment components 16 are arranged in a triangle. When the lens includes four adjustment components 16, the four adjustment components 16 are arranged in a rectangular shape. Or when the lens includes more adjustment components 16, the adjustment components 16 can be arranged in a circular or elliptical shape.

[0124] When the structure of the adjustment assembly 16 is only a fastening component 162 (such as a screw column), and the plurality of fastening components 162 are installed in the same direction (refer to Figure 3 and Figure 4 , the adjustment components 16 are all installed along the axial direction of the lens), so that six-degree-of-freedom adjustment can also be achieved through the synergy between the fastening components 162.

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

[0126] For example, an elastic component 161 (such as a spring, an elastic sheet, etc.) can be used to connect the screen module to the adjustment component 16. By rotating the adjustment component 16, the elastic component 161 can produce a certain elastic deformation, which can be converted into a translation of the screen module in the X and Y directions or a rotation around the X and Y axes.

[0127] In a specific embodiment, referring to Figure 2 The adjustment component 16 includes 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 back 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 adjustment assembly 16 pre-fixes the lens barrel 10 and the rear cover 11, the elastic component 161 sleeved on the outside of each of the fastening components 162 is adjusted in relative position, and the elastic component 161 will be elastically deformed accordingly. The deformation of the elastic component 161 is combined with the relative position adjustment between the fastening components 162, and acts on the screen module together, so that it can achieve flexible movement with six degrees of freedom. Specifically, this adjustment allows the position of the screen module to be changed, thereby ensuring that it is visually and physically coaxially arranged with the lens module.

[0129] Furthermore, when the screen module and the lens module are coaxially arranged by the adjusting component 16, mainly based on the position and quality of the picture displayed on the screen 12, at least one adjusting component 16 is rotated accordingly to adjust the six degrees of freedom of the screen module.

[0130] For example, in the process of realizing the coaxial arrangement of the screen module and the lens module, the main consideration is the position and quality of the image displayed by the screen 12. According to these parameters, at least one adjustment component 16 is rotated in a targeted manner to accurately adjust the six degrees of freedom of the screen module.

[0131] Specifically, it can be accomplished with the help of an external detection device that can detect the position and quality of the image displayed by the screen 12, thereby helping us determine which position of the adjustment component 16 needs to be rotated so as 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 adjustment component 16, that is, the screen module and the lens module are coaxial entirely by structural design, which can reduce costs and improve product competitiveness.

[0133] In an optional embodiment, in the above series of steps, referring to Fig. 9 and Figure 10a to Figure 10c Before installing the manufactured lens in the lens barrel 10 according to a predetermined installation direction, the method further includes:

[0134] Based on the optical structure model and the position of the burr 3 set for each lens, a clearance portion 4 corresponding to each burr 3 is formed in the lens barrel 10 .

[0135] In this embodiment, in order to ensure that the manufactured lens can be installed in the lens barrel 10 according to a predetermined installation direction, a step is added before installation: based on the optical architecture model and the position of the burr 3 set for each lens, a gap 4 corresponding to each burr 3 is formed in the lens barrel 10.

[0136] Specifically, the presence of the clearance portion 4 provides additional space for the burr 3 of the lens, thereby preventing the lens from being damaged or the installation position shifted during the installation process due to friction or collision between the burr 3 and the inner wall of the lens barrel 10, which affects the coaxiality of the lens group. During the installation process, even if there is a certain tolerance range in the size of the burr 3 of the lens, the clearance portion 4 can provide enough space to accommodate these differences, thereby ensuring that the lens can be installed in place.

[0137] For example, the optical architecture model can be used to calculate the size and position of the airtight portion 4 required for each lens during installation, ensuring that the airtight portion 4 can meet the requirements of lens installation without negatively affecting the overall optical performance of the lens.

[0138] Furthermore, forming a clearance portion 4 corresponding to each burr 3 in the lens barrel 10 specifically includes: at least a portion of the inner wall of the lens barrel 10 is inclined away from the axial direction of the lens barrel 10 to form an inclined surface, and the area of ​​the inclined surface that is avoided relative to the vertically arranged inner wall of the lens barrel 10 is the clearance portion 4.

[0139] Specifically, at least a portion of the inner wall of the lens barrel 10 is designed to be an inclined surface inclined away from the axis direction of the lens barrel 10. The size and position of the clearance portion 4 can be calculated by the inclination angle and length of the inclined surface to meet the requirements of different lens burrs 3.

[0140] Specifically, the inclined surface will leave a specific area relative to the vertical inner wall of the lens barrel 10, which is the avoidance portion 4. The shape and size of the avoidance portion 4 are closely related to the shape and size of the burr 3 of the lens, ensuring that the burr 3 can smoothly enter the avoidance portion 4 without being blocked when the lens is installed.

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

[0142] For example, refer to Fig.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 avoidance portion 4 , and the burr 3 is located in the avoidance portion 4 .

[0143] Reference Fig.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 . The area evacuated by the second inclined surface 52 is the avoiding portion 4 , and the burr 3 is located in the avoiding portion 4 .

[0144] Reference Fig.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. The area avoided by the third inclined surface 53 is the avoidance portion 4, and the burr surface is located in the avoidance portion 4.

[0145] The embodiment of the present application also provides a lens. The lens includes a lens module and a screen module, and the lens adopts the lens coaxial method as described above to make the lens module and the screen module coaxially arranged. In this embodiment, the lens adopts the above method to achieve the coaxial arrangement of the lens module and the screen module, thereby ensuring the imaging quality and optical stability of the lens. In addition, this method of achieving the coaxial arrangement of the screen module and the lens module entirely through structural design can reduce costs and improve product competitiveness.

[0146] In one embodiment, referring to Figure 2 At least three adjusting components 16 connect 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 .

[0147] In this embodiment, the structure of the adjustment component 16 is defined. After the screen module and the lens module are coaxially arranged by adjusting the adjustment component 16, the adjustment component 16 is also used to fasten the screen module and the lens module so that the screen module and the lens module are tightly connected.

[0148] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0149] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may 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 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: Placing the lens group in the lens barrel (10), wherein the lens group is coaxially arranged; Fixing the screen (12) on the back cover (11); The lens barrel (10) and the rear cover (11) are pre-fixed by at least three adjustment components (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 component (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: 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); According to the predetermined installation direction of each lens, the position of the burr edge (3) of each lens is set; According to the set burr (3) position, the parting line layout of the mold is clarified; Manufacturing a lens by using a set mold; The manufactured lens is installed in the lens barrel (10) according to a predetermined installation direction, so that the lenses in the lens group are coaxial.

4. The lens coaxial method according to claim 1, characterized in that: The lenses in the lens group are processed by CNC processing.

5. 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).

6. The lens coaxial method according to claim 1, characterized in that: Pre-fixing the lens barrel (10) and the rear cover (11) by using at least three adjustment components (16) specifically comprises: 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.

7. The lens coaxial method according to claim 6, 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 comprises: 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 out by a preset length relative to the lens barrel (10).

8. The lens coaxial method according to claim 7, characterized in that: The size range of the first gap is: 0.2mm~0.5mm.

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

10. 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 picture 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.

11. 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 10 to make the lens module and the screen module coaxially arranged.

12. The lens according to claim 11, characterized in that: At least three adjusting components (16) are connected to the lens barrel (10) and the rear cover (11); the adjusting components (16) comprise 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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