Optical lens, camera module, electronic device and assembling method of optical lens

Abstract

Embodiments of the present application provide an optical lens, a camera module, an electronic device and an assembling method of the optical lens. The optical lens comprises a focusing device, a lens assembly and an image-side lens. The focusing device comprises a fixed part and a moving part. The moving part is movably connected to the fixed part. The lens assembly comprises a lens barrel and a lens group arranged in the lens barrel. The lens barrel is connected to the moving part. The image-side lens is arranged below the lens assembly and is spaced apart from the bottom end of the lens assembly. The image-side lens is connected to the bottom end of the moving part. The moving part can drive the lens assembly and the image-side lens to move for focusing at the same time. In the technical solution of the present application, the relatively large image-side lens and the lens assembly are arranged separately. The image-side lens is connected to the end of the moving part of the focusing device. The size of the lens assembly in the optical lens can be designed to be smaller. Therefore, the overall size of the optical lens can be effectively controlled. This is helpful for further reducing the size of the camera module.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to an assembly method for an optical lens, a camera module, an electronic device, and an optical lens. Background Technology

[0002] With the continuous development of electronic and imaging technologies, camera modules on electronic devices are becoming increasingly powerful, and the quality of photos and videos is constantly improving. To ensure that camera modules can be installed on thinner electronic devices, stricter requirements are being placed on their dimensions. Taking mobile phones as an example, reductions in the length, width, and height of camera modules contribute to thinner and lighter phone designs.

[0003] However, the size of the optical lens in existing camera modules cannot meet the requirements for reducing the size of camera modules, and the size of the optical lens needs to be further reduced. Summary of the Invention

[0004] This application provides an assembly method for an optical lens, a camera module, an electronic device, and an optical lens in several aspects, thereby reducing the size of the optical lens on the camera module and further reducing the overall size of the camera module.

[0005] One embodiment of this application provides an optical lens, comprising:

[0006] A focusing device includes a fixed part and a movable part, wherein the movable part is movably connected to the fixed part;

[0007] A lens assembly includes a lens barrel and a group of lenses disposed in the lens barrel, the lens barrel being connected to the movable part;

[0008] Image-side lens is located below the lens assembly and spaced apart from the bottom of the lens assembly;

[0009] The image-side lens is connected to the bottom end of the moving part, and the moving part can simultaneously drive the lens assembly and the image-side lens to move and focus.

[0010] Optionally, the focusing device is a focusing motor;

[0011] The fixing part has a through hole, the moving part is disposed in the through hole, the moving part has a mounting hole, and the lens assembly is disposed in the mounting hole;

[0012] The diameter of the image-side lens is larger than the diameter of the mounting hole, and the diameter of the image-side lens is smaller than the diameter of the perforation.

[0013] Optionally, the image-side lens is connected to the end face of the bottom of the moving part, and the connection method between the image-side lens and the moving part is one of bonding, welding, snap-fitting, and connection by fasteners.

[0014] Optionally, the image-side lens includes an optical part and a connecting part, with the annular connecting part located around the circular optical part;

[0015] The connecting part is bonded to the annular end face at the bottom of the moving part by an adhesive.

[0016] Optionally, a recessed structure is provided on the annular end face at the bottom of the moving part or on the connecting part, the width of the annular end face or the width of the connecting part is D, and the value range of the recessed structure is [1 / 2D to 1 / 4D].

[0017] Optionally, the bottom end of the moving part is provided with a first connecting structure, and the connecting part of the image-side lens can be connected with the first connecting structure.

[0018] A gap is provided between the sidewall of the connecting part and the sidewall of the first connecting structure.

[0019] Optionally, the connecting surface of the connecting part is divided into an inner ring region and an outer ring region.

[0020] The surface roughness of the inner ring region is less than that of the outer ring region.

[0021] Optionally, the connecting part also has a back side opposite to the connecting surface, and the back side and the side wall of the connecting part are provided with a light-shielding structure.

[0022] Another embodiment of this application also provides a camera module, including...

[0023] Image sensor components;

[0024] The optical lens described above has its optical center set to correspond to the image center of the image sensor assembly, and the optical lens is connected to the top of the image sensor assembly.

[0025] One embodiment of this application also provides an electronic device, including:

[0026] Equipment body;

[0027] At least one of the above-mentioned camera modules, the surface of the device body is provided with a light-transmitting hole, and the camera module is disposed in the inner cavity of the device body corresponding to the light-transmitting hole.

[0028] In another embodiment of this application, an assembly method for an optical lens is also provided, applicable to the aforementioned optical lens; the assembly method includes:

[0029] The lens assembly is connected to the moving part of the focusing device;

[0030] The image-side lens is connected to the moving part to form the optical lens.

[0031] Optionally, the lens assembly is connected to the moving part of the focusing device, including:

[0032] The surface of the moving part is roughened;

[0033] After aligning the lens assembly with the moving part, fix it in a limited position;

[0034] Apply adhesive to the connection between the moving part and the lens assembly.

[0035] Optionally, the image-side lens is connected to the moving part to form the optical lens, including:

[0036] The bottom surface of the moving part is roughened;

[0037] Apply an adhesive to the bottom surface of the moving part, or apply an adhesive to the connecting part of the image-side lens; after aligning the optical center of the image-side lens with the optical center of the lens assembly, limit and fix the image-side lens to the bottom of the moving part.

[0038] In the technical solution provided in this application, the relatively large image-side lens is set separately from the lens assembly, and the image-side lens is connected to the end of the focusing device moving part. The diameter of the lens barrel in the lens assembly can also be designed to be smaller, thereby effectively controlling the diameter of the optical lens and helping to further reduce the overall size of the camera module using the optical lens. Attached Figure Description

[0039] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0040] Figure 1 This is a simplified structural diagram of a camera module provided in an embodiment of this application;

[0041] Figure 2 This is a partial structural schematic diagram of an optical lens provided in an embodiment of this application;

[0042] Figure 3 A comparative schematic diagram of a camera module with unreduced size provided in an embodiment of this application and the solution of this application;

[0043] Figure 4This is a cross-sectional view of a camera module provided in an embodiment of this application;

[0044] Figure 5 A cross-sectional view of an image-side lens provided in an embodiment of this application;

[0045] Figure 6 A front view of an image-side lens provided in an embodiment of this application;

[0046] Figure 7 This is another front view of the image-side lens provided in an embodiment of this application;

[0047] Figure 8 This is another front view of the image-side lens provided in the embodiments of this application;

[0048] Figure 9 A partial structural diagram of an optical lens provided in an embodiment of this application;

[0049] Figure 10 A partition diagram of an image-side lens provided in an embodiment of this application;

[0050] Figure 11a A partial cross-sectional view of a camera module provided in an embodiment of this application. Figure 1 ;

[0051] Figure 11b A partial cross-sectional view of another camera module provided in this application embodiment. Figure 2 ;

[0052] Figure 11c Partial cross-section of another camera module provided in the embodiments of this application. Figure 3 ;

[0053] Figure 12 This is a first flowchart illustrating an assembly method for an optical lens provided in an embodiment of this application.

[0054] Figure 13a This is a second flowchart illustrating an assembly method for an optical lens provided in an embodiment of this application.

[0055] Figure 13b A third flowchart illustrating an assembly method for an optical lens provided in an embodiment of this application;

[0056] Figure 14 A schematic diagram illustrating the assembly steps of an optical lens provided in an embodiment of this application;

[0057] Figure 15 A perspective view of an electronic device provided in an embodiment of this application;

[0058] Figure 16This is a cross-sectional view of another camera module provided in an embodiment of this application;

[0059] Figure 17a A stray light simulation method for entering a camera module is provided in the embodiments of this application. Figure 1 ;

[0060] Figure 17b Another stray light simulation method for entering a camera module provided in this application embodiment Figure 2 ;

[0061] Figure 17c Another method for simulating stray light entering a camera module, as provided in this application embodiment. Figure 3 . Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the indicated placement of components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and may change accordingly depending on the placement of components in the accompanying drawings.

[0064] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0065] Figure 1 This is a simplified structural diagram of a camera module provided in an embodiment of this application. Figure 2 This is a partial structural schematic diagram of an optical lens provided in an embodiment of this application. See also... Figure 1 and Figure 2In one embodiment of this application, an optical lens is provided, comprising: a focusing device 1, a lens assembly 2, and an image-side lens 3. The focusing device 1 is used to drive the lens assembly 2 and the image-side lens 3 to move, thereby achieving a focusing action. Specifically, the focusing device 1 includes a fixed part 12 and a moving part 11. The moving part 11 is movably connected to the fixed part 12, and the moving part 11 can move relative to the fixed part 12 along the axial direction of the optical lens. Figure 1 The lens assembly 2 (moving up and down in the direction of the dashed line A) includes a lens barrel 21 and a lens group disposed within the lens barrel 21. The lens group includes multiple different optical lenses 22, which are spaced apart according to optical principles. The lens barrel 21 is connected to the moving part 11. When the moving part 11 moves up and down along the axis of the optical lens, the lens barrel 21 moves up and down together with the moving part 11, thereby achieving optical focusing. The image-side lens 3 can be used in conjunction with the lens assembly 2 to achieve the corresponding optical image.

[0066] This application does not specifically limit the number of lenses in the lens group. The lens group can be a 6P (Plastic) lens, which consists of six plastic lenses, or a 7P lens, an 8P lens, or a lens in the 1G+6P combination mode, where 1G represents one ultra-high transparency WLG (wafer-grade) glass lens.

[0067] Along the height direction of the optical lens (which can also be considered as the direction of the optical lens axis A), the image-side lens 3 is positioned below the lens assembly 2, spaced apart from the bottom end of the lens assembly 2. When the lens assembly 2 is applied to a camera module, such as... Figure 4 As shown, since the image-side lens 3 is closer to the image sensor assembly 7 used to generate digital images, it can be considered as the lens closer to the image side, while the lens at the top of the lens assembly 2 can be considered as the lens closer to the object side.

[0068] In the technical solution of this application, the image-side lens 3 is connected to the bottom end of the moving part 11, and the moving part 11 can simultaneously drive the lens assembly 2 and the image-side lens 3 to move and focus. It can be considered that the image-side lens 3 is set separately from the lens assembly 2, and the image-side lens 3 is not integrated into the lens barrel 21 of the lens assembly 2, thereby effectively reducing the size of the optical lens in the length and width directions. When the optical lens is applied to the camera module, it helps to further reduce the size of the camera module.

[0069] The technical solution of this application reduces the structural size of the optical lens in detail below.

[0070] Typically, the diameter of the side lens 3 is larger than the diameter of the other optical lenses 22, such as Figure 3 As shown, Figure 3 The diagram on the left shows a simplified structural diagram of a camera module with the optical lens structure dimensions not reduced. Figure 3 The diagram on the right is a simplified structural diagram of the camera module in this application. If the image-side lens 3 is integrated into the lens barrel 21 of the lens assembly 2, the diameter B of the lens barrel 21 will be larger, and the overall dimension A of the optical lens will also be larger. The optical lens has dimensions in the length direction (X direction) and the width direction (Y direction). Typically, the optical lens has a square structure, and dimension A can simultaneously represent the dimensions in both the length and width directions of the optical lens.

[0071] like Figure 3 As shown in the simplified structural diagram of the camera module on the right, if the image-side lens 3 is separated from the lens assembly 2, the lens barrel 21 of the lens assembly 2 only includes a smaller diameter optical lens 22. The image-side lens 3 can fully utilize the empty space below the moving part 11. Therefore, the diameter of the lens barrel 21 in this technical solution will also be smaller, specifically B-xx millimeters, which can be understood as a reduction of xx millimeters from size B. The specific reduction in size is determined by the size of the image-side lens 3. Furthermore, when the diameter of the lens barrel is reduced, the overall size of the optical lens will also be reduced by xx millimeters from size A. Therefore, the technical solution of this application is similar to... Figure 3 Compared to the technical solution shown in the left figure, the diameter of lens assembly 2 is smaller, so the overall size of the optical lens is also smaller, thereby reducing the structural size of the optical lens.

[0072] The differences between the two approaches can be visually illustrated in the table below:

[0073] Lens XY dimensions Optical lens XY dimensions Lens assembly method Lens structure Solution without size reduction B A Side joint One-piece The technical solution of this application B-xx millimeters A-xx millimeters Z-direction bonding Grouping

[0074] In the table above, the side-mounted connection in lens assembly refers to the connection method between the optical lens and the focusing device, where the optical lens is bonded to the focusing device by applying adhesive to its side. The Z-axis bonding refers to the image-side lens 3 being bonded to the focusing device along the height direction (Z-reverse direction) of the optical lens using adhesive.

[0075] In one technical solution provided in this application, the focusing device 1 includes, but is not limited to, a voice coil motor, an ultrasonic motor, a stepper motor, a shape memory alloy motor, etc. In a specific embodiment, taking a focusing motor (voice coil motor) as an example, the moving part 11 can move up and down relative to the fixed part 12 along the axis of the optical lens through electromagnetic force. The fixed part 12 has a through hole, and the annular moving part 11 is disposed in the through hole. The moving part 11 has a through mounting hole, the lens assembly 2 is disposed in the mounting hole, and the lens barrel 21 is connected to the inner wall of the mounting hole.

[0076] Further, see Figure 4As shown, the diameter D2 of the image-side lens 3 is larger than the diameter D1 of the mounting hole, and the diameter D2 of the image-side lens 3 is smaller than the diameter D3 of the perforation. This can be understood as the diameter of the image-side lens 3 falling between the diameter of the mounting hole and the diameter of the perforation. This technical solution can prevent the image-side lens 3 from rubbing against the fixing part 12, thus affecting the movement of the image-side lens 3, and can also ensure that the image-side lens 3 and the moving part 11 have sufficient contact area, preventing the image-side lens 3 from falling off.

[0077] In one technical solution provided in this application, the image-side lens 3 is connected to the end face of the bottom of the moving part 11. The connection method between the image-side lens 3 and the moving part 11 includes, but is not limited to, bonding, welding, snap-fitting, and connection via fasteners. For example, the image-side lens 3 is bonded together using adhesive, double-sided tape, etc. Alternatively, the image-side lens 3 is connected to the end face of the moving part 11 by welding methods such as ultrasonic welding or laser welding. Alternatively, the end faces of the image-side lens 3 and the moving part 11 are respectively provided with snap-fit ​​structures, which can be fitted together. In the technical solution provided in this application, bonding the image-side lens 3 to the end face of the bottom of the moving part 11 not only facilitates the installation of the image-side lens 3, but also allows the image-side lens 3 to fully utilize the empty space below the bottom of the moving part 11, thereby further reducing the size of the optical lens.

[0078] Further, see Figure 5 and Figure 6 The image-side lens 3 includes an optical section 31 and a connecting section 32, with the annular connecting section 32 located around the circular optical section 31. The optical section 31 of the image-side lens 3 can be considered as the effective optical area of ​​the lens, and the connecting section 32 is bonded to the annular end face of the bottom of the moving part 11 by an adhesive. The optical section 31 and the connecting section 32 can be an integral structure or a combinable structure. To make the connection between the connecting section 32 and the moving part 11 on the image-side lens 3 tighter, the end face of the moving part 11 and the connecting surface 323 of the connecting section 32 can be, in addition to being mutually mating planes, mutually mating concave and convex surfaces. In this way, the contact area between the connecting section 32 and the moving part 11 will be larger, and the connection will be tighter. It should be noted that... Figure 5 and Figure 6 The diagram only schematically shows the general structure of the image-side lens 3 and does not represent the actual structure of the image-side lens 3.

[0079] In one specific embodiment, see Figure 1 When the image-side lens 3 is bonded to the moving part 11, the thickness h of the adhesive on the end face of the moving part 11 will be controlled within the range of 200 micrometers, thereby reducing the structural dimensions of the optical lens in the height direction. Further, see... Figure 1In addition, to ensure the stable performance of the optical lens, the colloid 10 does not extend beyond the side of the moving part 11. That is, it can be assumed that the colloid 10 does not overflow onto the side wall of the connecting part 32. The colloid 10 is spaced apart from the hole wall of the perforation on the fixing part 12 to avoid contact between the colloid 10 and the hole wall of the perforation.

[0080] The adhesive 10 includes, but is not limited to: UV adhesive, AB adhesive, all-purpose adhesive, thermosetting dual-curing adhesive, double-sided tape, etc. In one specific embodiment, in order to facilitate the optical position alignment adjustment after the image-side lens 3 comes into contact with the moving part 11, UV adhesive is usually used for bonding. Before the UV adhesive is cured, the optical center of the image-side lens 3 can be aligned with the optical center of the lens assembly 2 by the equipment, and then the UV adhesive is cured by ultraviolet light.

[0081] See Figures 5 to 8 In one embodiment provided in this application, a recessed structure 4 is provided on the annular end face of the bottom of the moving part 11 or on the connecting part 32. The recessed structure 4 can not only increase the contact area with the colloid and improve the shear resistance of the colloid, but also store excess colloid, thereby preventing excess colloid from overflowing. Specifically, the recessed structure 4 can be located on the annular end face of the bottom of the moving part 11, or on the connecting surface 323 where the connecting part 32 and the moving part 11 are connected, or both can have the recessed structure 4. Taking the recessed structure 4 provided on the connecting surface 323 of the connecting part 32 as an example, see [reference needed]. Figure 6 The recessed structure 4 is an annular groove opened on the connecting part 32, or, as... Figure 7 As shown, the recessed structure 4 is an irregularly shaped groove provided on the connecting part 32, or, as... Figure 8 As shown, the recessed structure 4 consists of multiple holes and slots opened on the connecting part 32.

[0082] In one embodiment, the width of the annular end face or the width of the connecting part 32 is D. To facilitate the processing of the recessed structure 4 and achieve a better connection effect, the value range of the size of the recessed structure 4 (width of the groove or diameter of the hole) is [1 / 2D to 1 / 4D], specifically 1 / 3D.

[0083] Further, see Figure 9 In one embodiment provided in this application, the bottom end of the moving part 11 is provided with a first connecting structure 5, and the connecting part 32 of the image-side lens 3 can be connected to the first connecting structure 5. The connection between the first connecting structure 5 and the connecting part 32 not only facilitates the installation of the image-side lens 3, but also makes the connection between the image-side lens 3 and the moving part 11 more secure. The surface of the first connecting structure can be a flat surface or a concave-convex surface. Of course, the recessed structure 4 mentioned above can also be provided on the surface of the first connecting structure 5. In a specific embodiment, such as... Figure 9As shown, the first connecting structure 5 is an L-shaped groove at the bottom of the movable part 11, and the connecting part 32 can be connected to the L-shaped groove.

[0084] In another embodiment, the first connecting structure 5 can also be an annular protrusion on the bottom end of the movable part 11, and the connecting part 32 is provided with a groove that matches the protrusion. When the image-side lens 3 is connected to the bottom end of the movable part 11, the groove on the connecting part 32 is connected with the protrusion. In order to facilitate the filling of the colloid, the size of the groove can be set to be larger than that of the protrusion, and the colloid can effectively fill the gap so that the two are tightly connected.

[0085] Furthermore, to facilitate the position adjustment of the image-side lens 3, a gap is provided between the side wall of the connecting part 32 and the side wall of the first connecting structure 5. Specifically, the inner diameter of the annular groove on the first connecting structure 5 is larger than the outer diameter of the image-side lens 3. When the image-side lens 3 is connected to the first connecting structure 5, it is not a tight fit. Before the colloid 10 is cured, the image-side lens 3 can move on the plane corresponding to the bottom end face of the lens assembly 2, thereby facilitating the optical alignment of the image-side lens 3. The colloid 10 is then cured after alignment.

[0086] See Figure 10 In one embodiment provided in this application, the connecting surface 323 of the connecting portion 32 is divided into an inner ring region 321 and an outer ring region 322, with the width of the inner ring region 321 being smaller than the width of the outer ring region 322. When the connecting portion 32 is connected to the moving portion 11, both the inner ring region 321 and the outer ring region 322 on the connecting surface 323 will contact the end face of the bottom of the moving portion 11. The surface roughness of the inner ring region 321 is smaller than that of the outer ring region 322. Since the inner ring region 321 is closer to the optical portion 31, setting the surface roughness of the inner ring region 321 to be smaller can effectively prevent the colloid from overflowing from the inner ring region 321 onto the optical portion 31. The surface roughness of the outer ring region is larger, which can effectively improve the connection strength. In a specific embodiment, the surface roughness of the inner ring region 321 is less than 0.16 micrometers, and the surface roughness of the outer ring region 322 is greater than 0.8 micrometers. The adjustment of the roughness of the inner ring region 321 and the outer ring region 322 can be achieved by changing the design of the molding die of the image-side lens 3.

[0087] The following section provides a detailed introduction to the anti-stray light technology of the image-side lens using stray light simulation diagrams.

[0088] See Figures 17a to 17c The figure shows stray light spots formed on the image sensor assembly 7 after being refracted by the ineffective optical areas of different optical lenses 22 at different incident angles. Figure 17a The image on the left shows a simulated path of stray light with an incident angle of 18 degrees after passing through the ineffective optical region of the first optical lens 22b. Figure 17aThe image on the right shows stray light spots formed on the image sensor assembly 7. As can be seen, there are only a few stray light spots in the image. Figure 17b The image on the left shows a simulated path of stray light with an incident angle of 36 degrees after passing through the ineffective optical region of the third optical lens 22c. Figure 17b The image on the right shows stray light spots formed on the image sensor component 7. As can be seen, there are many stray light spots in the image. Figure 17c The image on the left shows a simulated path of stray light with an incident angle of 32 degrees after passing through the ineffective optical region of the fourth optical lens (22d). Figure 17c The right-hand image shows stray light spots formed on the image sensor assembly 7. It can be seen that the number of stray light spots has increased significantly. Therefore, it can be inferred that the more stray light is refracted through the ineffective optical area of ​​the optical lens 22, which is closer to the image sensor assembly 7, the more stray light spots will be formed on the image sensor assembly 7. Since the image-side lens 3 is closest to the image sensor assembly 7, stray light refracted through the ineffective optical area (connection portion 32) of the image-side lens 3 will inevitably generate more stray light spots on the image sensor assembly 7. Therefore, preventing stray light from entering the ineffective area of ​​the image-side lens 3 is very important.

[0089] Furthermore, since the outer side of the image-side lens 3 is not enclosed by the lens barrel 21, stray light leaking from the movement gap of the focusing device 1 can enter the optical section 31 through the connecting part 32, thereby generating many stray light spots on the image sensor assembly 7 and affecting the imaging quality of the optical section 31. See also Figure 5 and Figure 9 In one embodiment provided in this application, the connecting portion 32 also has a back surface opposite to the connecting surface 323, and a light-shielding structure 6 is provided on the back surface and the side wall of the connecting portion 32. The light-shielding structure 6 can be a light-shielding sheet adhered to the surface of the connecting portion 32, or it can be a black coating applied to the surface of the connecting portion 32. Furthermore, in order to effectively block stray light from entering the connecting portion 32 of the image-side lens 3, it can also be achieved by reducing the movement gap of the focusing device 1, blackening the side wall of the focusing device 1, or attaching Mylar film to the reflective surface of the focusing device 1.

[0090] See Figures 11a to 11c In the embodiments provided in this application, multiple optical lenses 22 are typically stacked in sequence in the lens barrel 21. A limiting part 17 is provided at the top of the lens barrel 21. The first optical lens 22b abuts against the limiting part 17, thereby limiting it in the lens barrel 21. Subsequently, multiple optical lenses 22 are stacked in sequence and abut against each other. The last optical lens 22a is connected to the inner wall of the lens barrel 21, thereby limiting all the optical lenses 22 in the lens barrel 21.

[0091] This application provides various technical solutions for the connection between the last optical lens 22a and the lens barrel 21. For example, see... Figure 11a The last optical lens 22a can be bonded to the inner wall of the lens barrel 21 using the adhesive 10. Specifically, after the lens is installed in the lens barrel 21, the adhesive 10 is applied to the outer edge of the lens. After the adhesive 10 cures, the lens can be connected to the lens barrel 21.

[0092] For example, see Figure 11b The last optical lens 22a can be fixed to the lens barrel 21 by the pressure ring 15. Specifically, the pressure ring 15 can be connected to the inner wall of the lens barrel 21. The pressure ring 15 is located below the last optical lens 22a and directly abuts against the outer edge of the last optical lens 22a.

[0093] For example, see Figure 11c When the last optical lens 22a is connected to the lens barrel 21 via the colloid 10, a light-shielding plate 18 and a spacer 16 can be provided between the colloid 10 and the bottom end of the last optical lens 22a. Specifically, the light-shielding plate 18 is directly connected to the bottom end face of the last optical lens 22a, and the spacer 16 is located below the light-shielding plate 18 and abuts against it. The colloid 10 is dotted below the spacer 16, and the colloid 10 is connected to the spacer 16 and the inner wall of the lens barrel 21, thereby confining the last optical lens 22a, the light-shielding plate 18, and the spacer 16 within the lens barrel 21.

[0094] See Figure 12 In one embodiment of this application, a method for assembling an optical lens is also provided. This assembly method is applicable to the optical lenses described in any of the above embodiments. The method for assembling an optical lens includes the following steps:

[0095] S101, the lens assembly 2 is connected to the moving part 11 of the focusing device 1;

[0096] S102, the image-side lens 3 is connected to the moving part 11 to form the optical lens.

[0097] In step S101 above, the connection between the lens assembly 2 and the moving part 11 can be by adhesive bonding, snap-fitting, or fastener connection. Typically, to reduce the number of parts and simplify the installation process, the lens assembly 2 and the moving part 11 are bonded together using UV adhesive.

[0098] To improve the structural strength of optical lenses, a protective housing is typically installed around them, with the focusing device 1 connected within it. The assembly process for these components involves two steps: First, the lens assembly 2 is connected to the focusing device 1, then the image-side lens element 3 is installed, and finally the combined structure is installed into the protective housing. Second, after assembling and connecting the lens assembly 2 and the focusing device 1, the combined structure is directly installed into the protective housing, and finally the image-side lens element 3 is installed through the bottom opening of the protective housing.

[0099] Referring to 13a, in one embodiment provided in this application, the above step "S101, the lens assembly 2 is connected to the moving part 11 of the focusing device 1;" further includes the following step:

[0100] S1011, roughen the surface of the moving part 11;

[0101] S1012, After aligning the lens assembly 2 with the moving part 11, limit and fix it;

[0102] S1013, apply adhesive to the connection between the moving part 11 and the lens assembly 2.

[0103] In the above steps, the surface of the moving part 11 can be roughened by a surface treatment device. The surface treatment device includes, but is not limited to, plasma surface treatment equipment, grinding equipment, etc. Roughening the surface of the moving part 11 can enhance the connection strength between the moving part 11 and the lens assembly 2.

[0104] When aligning the lens assembly 2 with the moving part 11, the axis of the lens assembly 2 must coincide with the axis of the moving part 11 to achieve better optical performance. After aligning the lens assembly 2 and the moving part 11, they can be positioned relative to each other using clamps or limiting devices. Then, UV adhesive can be applied to the connection between the moving part 11 and the lens assembly 2 using a dispensing device. Finally, by irradiating with an ultraviolet lamp and waiting for the UV adhesive to cure, the lens assembly 2 and the moving part 11 of the focusing device 1 can be securely connected.

[0105] See Figure 13b In one embodiment provided in this application, the above step "S102, connecting the image-side lens 3 to the moving part 11 to form the optical lens" further includes the following step:

[0106] S1021, roughen the bottom surface of the moving part 11;

[0107] S1022, apply adhesive to the bottom surface of the moving part 11, or apply adhesive to the connecting part 32 of the image side lens 3;

[0108] S1023, after aligning the optical center of the image-side lens 3 with the optical center of the lens assembly 2, the image-side lens 3 and the bottom end of the moving part 11 are fixed in a limited position.

[0109] In the above steps, when bonding the image-side lens 3 to the bottom of the moving part 11, it is necessary to roughen the bottom surface of the moving part 11 or the connecting surface 323 of the image-side lens 3 connecting part 32 to ensure that the surface roughness meets the requirements before applying adhesive to the bottom surface of the moving part 11 or the connecting surface 323 of the image-side lens 3 connecting part 32. The surface treatment equipment described above can also be used to roughen the bottom surface of the moving part 11. Before the adhesive cures, the optical center of the image-side lens 3 can be aligned with the optical center of the lens assembly 2 using optical equipment. After alignment, the two are limited by clamps or limiting devices, and then the UV adhesive is irradiated with an ultraviolet lamp and allowed to cure, thus completing the entire assembly process.

[0110] The following is combined Figure 14 The flowchart in the document describes in detail the assembly method of the optical lens. It should be noted that the optical lens assembly steps shown in this flowchart are only one embodiment provided in this application and do not represent the only assembly steps. See also... Figure 14 As shown, the first step in the installation is to roughen the outer surface of the lens barrel 21 or the surface of the moving part 11 of the focusing device to facilitate subsequent bonding. Then, the lens barrel 21 is placed into the focusing device. Before bonding the lens barrel 21 and the focusing device, the installation position of the lens barrel 21 needs to be precisely adjusted. Then, the adhesive 10 can be applied to the connection between the lens barrel 21 and the moving part 11. After the adhesive 10 has cured, the next step of installation can be carried out.

[0111] Furthermore, before connecting the image-side lens 3 to the moving part 11 of the focusing device, the connecting part 32 of the image-side lens 3 or the end face of the moving part 11 also needs to be roughened to enhance the connection strength between the image-side lens 3 and the focusing device. After the surface roughening is completed, the adhesive 10 can be directly applied to the end face of the image-side lens 3 or the moving part 11. Before the adhesive 10 cures, the optical center of the image-side lens 3 is aligned with the optical center of the lens assembly 2 using optical equipment. After alignment, wait for the adhesive 10 to cure, and the assembly is completed.

[0112] See Figure 15In one embodiment of this application, an electronic device is also provided. The electronic device includes a device body 100 and at least one camera module, which can be used for video and image capture. Typically, the device body 100 of the electronic device has a hollow inner cavity, in which the camera module, circuit board, and power supply components are all housed. A light-transmitting hole 40 is provided on the surface of the device body 100, and the camera module is positioned corresponding to the light-transmitting hole 40, allowing the electronic device to take pictures or videos of its external environment through the light-transmitting hole 40.

[0113] Electronic devices include, but are not limited to: mobile phones, tablets, laptops, cameras, in-vehicle devices, wearable devices, virtual reality devices, etc. Taking a mobile phone as an example, the camera module can be a front-facing camera or a rear-facing camera. The front-facing camera can take pictures or videos of the external environment through the light-transmitting hole 40 on the screen, while the rear-facing camera can take pictures or videos of the external environment through the camera hole on the back cover of the phone.

[0114] Figure 15 A three-dimensional structural diagram of a mobile phone provided in an embodiment of this application is shown below. Figure 15 In one embodiment provided in this application, the back cover 101 of the mobile phone has multiple camera holes, and a camera module is provided at the position corresponding to each camera hole. The camera module includes, but is not limited to, a main camera, a wide-angle camera, a telephoto camera, a macro camera, and a periscope camera. The back cover of the mobile phone also includes a decorative cover plate 102, on which the camera holes are formed. A lens protective glass is also provided on the decorative cover plate 102 at the position corresponding to the camera hole, allowing external light to pass through the lens protective glass and enter the camera module.

[0115] It should be noted that, Figure 15 The diagram only schematically illustrates one structure of the electronic device; the actual shape, size, location, and construction of the components on the electronic device are not subject to change. Figure 15 Limitations. In some other embodiments, the cover of the electronic device may not include a decorative cover, and the lens protection glass may be an integral structure with the back cover of the phone.

[0116] See Figure 16In one embodiment of this application, a camera module is also provided, which is suitable for the electronic devices mentioned above. The camera module includes an image sensor assembly 7 and an optical lens. The image sensor assembly 7 is mainly used to convert light signals into electrical signals, thereby generating digital images. Typically, the image sensor assembly 7 has an image center; only when external light is focused on the image center can a clear digital image be generated. When the optical lens is combined and connected with the image sensor assembly 7, it is often necessary to align the optical center of the optical lens with the image center of the image sensor assembly 7. Along the height direction of the camera module, the optical lens is connected to the top of the image sensor assembly 7, and there is a certain gap between the optical lens and the image sensor assembly 7.

[0117] like Figure 16 As shown, the image sensor assembly 7 includes components such as a photosensor 71, a circuit board, and a filter 72. The photosensor is mounted on the circuit board, the filter is located between the photosensor and the optical lens, and the optical lens is connected to the top of the circuit board via a bracket 50. It should be noted that... Figure 16 The components shown and described above are only some of the components of the camera module and do not constitute any limitation on the actual structure of the camera module.

[0118] In summary, the technical solution provided in this application separates the relatively large image-side lens from the lens assembly, with the image-side lens connected to the end of the focusing device's moving part. This allows for a smaller diameter of the lens barrel in the lens assembly, effectively controlling the diameter of the optical lens. Furthermore, by controlling the thickness of the adhesive, the height dimension of the optical lens can be reduced. Ultimately, this contributes to a further reduction in the size of the camera module using this optical lens.

[0119] The above description is merely an exemplary embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An optical lens, characterized in that, include: A focusing device includes a fixed part and a movable part, wherein the movable part is movably connected to the fixed part; A lens assembly includes a lens barrel and a group of lenses disposed in the lens barrel, the lens barrel being connected to the movable part; Image-side lens is located below the lens assembly and spaced apart from the bottom of the lens assembly; The image-side lens is connected to the moving part, and the moving part can simultaneously drive the lens assembly and the image-side lens to move and focus; The fixing part has a through hole, the moving part is disposed in the through hole, the moving part has a mounting hole, and the lens assembly is disposed in the mounting hole; The diameter of the image-side lens is larger than the diameter of the mounting hole, and the diameter of the image-side lens is smaller than the diameter of the perforation.

2. The optical lens according to claim 1, characterized in that, The focusing device is a focusing motor.

3. The optical lens according to claim 2, characterized in that, The image-side lens is connected to the end face of the bottom of the moving part, and the connection method between the image-side lens and the moving part is one of the following: bonding, welding, snap-fitting, and connection by fasteners.

4. The optical lens according to claim 3, characterized in that, The image-side lens includes an optical part and a connecting part, with the annular connecting part located around the circular optical part; The connecting part is bonded to the annular end face at the bottom of the moving part by an adhesive.

5. The optical lens according to claim 4, characterized in that, The annular end face at the bottom of the moving part or the connecting part is provided with a recessed structure, the width of the annular end face or the width of the connecting part is D, and the value range of the recessed structure is [1 / 2D~1 / 4D].

6. The optical lens according to any one of claims 1 to 5, characterized in that, The bottom end of the movable part is provided with a first connecting structure, and the connecting part of the image-side lens can be connected with the first connecting structure. A gap is provided between the sidewall of the connecting part and the sidewall of the first connecting structure.

7. The optical lens according to claim 4, characterized in that, The connecting surface of the connecting part is divided into an inner ring area and an outer ring area. The surface roughness of the inner ring region is less than that of the outer ring region.

8. The optical lens according to claim 7, characterized in that, The connecting part also has a back side opposite to the connecting surface, and the back side and the side wall of the connecting part are provided with a light-shielding structure.

9. A camera module, characterized in that, include Image sensor components; The optical lens according to any one of claims 1 to 8, wherein the optical center of the optical lens is disposed corresponding to the image center of the image sensor assembly, and the optical lens is connected to the top of the image sensor assembly.

10. An electronic device, characterized in that, include: Equipment body; At least one camera module as described in claim 9, wherein the surface of the device body is provided with a light-transmitting hole, and the camera module is disposed in the inner cavity of the device body corresponding to the light-transmitting hole.

11. A method for assembling an optical lens, characterized in that, Suitable for optical lenses as described in any one of claims 1 to 7; the assembly method includes; The lens assembly is connected to the moving part of the focusing device; The image-side lens is connected to the moving part to form the optical lens.

12. The method for assembling an optical lens according to claim 11, characterized in that, The lens assembly is connected to the moving part of the focusing device, including: The surface of the moving part is roughened; After aligning the lens assembly with the moving part, fix it in a limited position; Apply adhesive to the connection between the moving part and the lens assembly.

13. The method for assembling an optical lens according to claim 11, characterized in that, Connecting the image-side lens to the moving part to form the optical lens includes: The bottom surface of the moving part is roughened; Apply an adhesive to the bottom surface of the moving part, or apply an adhesive to the connecting part of the image-side lens; After aligning the optical center of the image-side lens with the optical center of the lens assembly, the image-side lens and the bottom end of the moving part are fixed in a limited position.

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