Optical lens, camera module and electronic equipment

Abstract

The embodiment of the utility model provides an optical lens, a camera module and electronic equipment, and the optical lens comprises a focusing device which comprises a fixed part and a movable part, and the movable part is movably connected to the fixed part; the lens assembly comprises a lens barrel and a lens group arranged in the lens barrel, and the lens barrel is connected with the moving part; the image side lens is connected to the bottom end of the lens barrel; the moving part can simultaneously drive the lens assembly and the image side lens to move and focus. According to the technical scheme, the image side lens and the lens assembly which are relatively large in size are arranged in a split mode, the image side lens is connected to the end of the lens assembly, and the size of the lens assembly in the optical lens can be designed to be smaller, so that the overall size of the optical lens can be effectively controlled, and further reduction of the size of the camera module is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to an optical lens, a camera module and an electronic equipment. Background Art

[0002] With the continuous development of electronic technology and imaging technology, the performance of camera modules on electronic devices is getting stronger and stronger, and the quality of taking photos and videos is also constantly improving. In order to meet the requirements of camera modules being installed on thinner electronic devices, people have more stringent requirements on the size of camera modules. Taking mobile phones as an example, the reduction in the length, width and height of camera modules is conducive to the design of thinner mobile phones.

[0003] However, the size of the optical lens of the existing camera module cannot meet the requirement of reducing the size of the camera module, and the size of the optical lens needs to be further reduced. Utility Model Content

[0004] The present application provides an optical lens, a camera module and an electronic device in multiple aspects, so that the size of the optical lens on the camera module is reduced, and the overall size of the camera module will also be further reduced.

[0005] In one embodiment of the present application, an optical lens is provided, comprising:

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

[0007] A lens assembly, comprising a lens barrel and a lens group arranged in the lens barrel, wherein the lens barrel is connected to the moving part;

[0008] An image side lens, the image side lens being connected to the bottom end of the lens barrel;

[0009] The moving part can simultaneously drive the lens assembly and the image side lens to move and focus.

[0010] Optionally, the image side lens is connected to the end surface of the bottom end of the lens barrel, and the image side lens is connected to the lens barrel by one of bonding, welding, clamping and fastening;

[0011] The focusing device is a focusing motor; the moving part has a mounting hole, the lens assembly is arranged in the mounting hole, and the diameter of the image side lens is less than or equal to the diameter of the mounting hole.

[0012] Optionally, the image side lens comprises an optical portion and a connecting portion, and the annular connecting portion is located at the periphery of the circular optical portion;

[0013] The outer diameter of the connecting portion is equal to or smaller than the diameter of the lens barrel;

[0014] The connecting portion is bonded to the annular end surface of the bottom end of the lens barrel through colloid.

[0015] Optionally, the image side lens is located in the mounting hole;

[0016] The image side lens is connected to the bottom end surface of the lens assembly to form a combined component;

[0017] The combined component is arranged in the mounting hole, and the combined component is connected to the hole wall of the mounting hole through the colloid;

[0018] The colloid is filled between the side wall of the upper end of the lens barrel and the hole wall of the mounting hole.

[0019] Optionally, multiple positions on the combined component are bonded to the hole wall of the mounting hole;

[0020] The colloid is filled between the side wall of the lower end of the lens barrel and the hole wall of the mounting hole;

[0021] The colloid covers the side wall of the image side lens.

[0022] Optionally, a recessed structure is provided on the annular end surface at the bottom end of the lens barrel or on the connecting portion, the width of the annular end surface or the connecting portion is D, and the size of the recessed structure ranges from [1 / 2D to 1 / 4D].

[0023] Optionally, the connection surface of the connection portion is divided into an inner ring area and an outer ring area.

[0024] The surface roughness of the inner ring region is smaller than the surface roughness of the outer ring region.

[0025] Optionally, the connecting portion further comprises a back surface opposite to the connecting surface, and a light shielding structure is provided on the back surface and the side wall of the connecting portion.

[0026] In another embodiment of the present application, a camera module is provided, comprising:

[0027] Image sensor assembly;

[0028] The optical center of the optical lens is arranged corresponding to the image center of the image sensor assembly, and the optical lens is connected to the top of the image sensor assembly.

[0029] In another embodiment of the present application, an electronic device is provided, including:

[0030] Equipment body;

[0031] At least one of the above-mentioned camera modules has a light-transmitting hole on the surface of the device body, and the camera module is arranged in the inner cavity of the device body corresponding to the light-transmitting hole.

[0032] In the technical solution provided in the present application, a relatively large image side lens is separated from the lens assembly, and the image side lens is connected to the end of the lens assembly. 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, which helps to further reduce the overall size of the camera module using the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0034] Figure 1 A simplified structural diagram of a camera module provided in an embodiment of the present application;

[0035] Figure 2 A schematic diagram of a partial structure of an optical lens provided in an embodiment of the present application;

[0036] Figure 3 A schematic diagram for comparing a camera module with an unreduced size provided in an embodiment of the present application with the solution of the present application;

[0037] Figure 4 A cross-sectional view of a camera module provided in an embodiment of the present application;

[0038] Figure 5 A cross-sectional view of an image side lens provided in an embodiment of the present application;

[0039] Figure 6 A front view of an image side lens provided in an embodiment of the present application;

[0040] Figure 7 A front view of another image side lens provided in an embodiment of the present application;

[0041] Figure 8 A front view of another image side lens provided in an embodiment of the present application;

[0042] Fig. 9 A partition diagram of an image side lens provided in an embodiment of the present application;

[0043] Fig.10 A schematic diagram of the location of a shading structure provided in an embodiment of the present application;

[0044] Fig.11aA partial cross-sectional view of a camera module provided in an embodiment of the present application Figure 1 ;

[0045] Fig.11b Another partial cross-sectional view of a camera module provided in an embodiment of the present application Figure 2 ;

[0046] Fig.11c A partial cross-sectional view of another camera module provided in an embodiment of the present application Figure 3 ;

[0047] Fig.12 A schematic diagram of the assembly steps of an optical lens provided in an embodiment of the present application;

[0048] Fig.13 A three-dimensional diagram of an electronic device provided by an embodiment of the present application;

[0049] Fig.14 A cross-sectional view of another camera module provided in an embodiment of the present application;

[0050] Fig.15a A simulation of stray light entering a camera module provided in an embodiment of the present application Figure 1 ;

[0051] Fig.15b Another stray light simulation for entering the camera module provided in the embodiment of the present application Figure 2 ;

[0052] Fig.15c Another stray light simulation for entering the camera module provided in the embodiment of the present application Figure 3 . DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0054] In the present application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more. In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for description and clarification relative to each other, and they may change accordingly according to changes in the orientation of the components placed in the drawings.

[0055] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0056] Figure 1 A simplified structural diagram of a camera module provided in an embodiment of the present application is shown in FIG. Figure 2 This is a partial structural diagram of an optical lens provided in an embodiment of the present application. Figure 1 and Figure 2 In one embodiment of the present application, an optical lens is provided, the optical lens 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 to achieve a focusing action. Specifically, the focusing device 1 comprises a fixed portion 12 and a moving portion 11, the moving portion 11 can be movably connected to the fixed portion 12, and the moving portion 11 can move relative to the fixed portion 12 along the axis direction of the optical lens ( Figure 1 The lens assembly 2 includes a lens barrel 21 and a lens group disposed in the lens barrel 21. The lens group includes a plurality of different optical lenses 22. The plurality of optical lenses 22 are arranged at intervals 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 can move up and down 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 corresponding optical imaging.

[0057] This application does not make any specific limitation on the number of lenses in a lens group. The lens group can be a 6P (Plastic) lens, that is, six plastic lenses, or a 7P lens, 8P lens, etc., or a lens in a 1G+6P combination mode, where 1G represents one ultra-high-transmittance WLG (wafer-level) glass lens.

[0058] Along the height direction of the optical lens (which can also be considered as the axis A direction of the optical lens), the image side lens 3 is arranged below the lens assembly 2 and connected to 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 for generating digital images, it can be considered as the lens close to the image side, and the lens at the top of the lens assembly 2 can be considered as the lens close to the object side.

[0059] In the technical solution of the present application, the image side lens 3 is connected to the bottom end of the lens assembly 2, 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 separately provided 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 direction and the width direction. When the optical lens is applied to the camera module, it helps to further reduce the size of the camera module.

[0060] The following is a detailed description of how the technical solution of the present application reduces the structural size of the optical lens. Usually, the diameter of the image side lens 3 is larger than the diameter of the other optical lenses 22, such as Figure 3 As shown, Figure 3 The figure on the left shows the schematic diagram of the structure of the camera module without reducing the size of the optical lens structure. Figure 3 The figure on the right is a simplified structural diagram of the camera module of the technical solution 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 also be larger, and the dimension A of the entire optical lens will also be larger. Usually, the optical lens has dimensions in the length direction (X direction) and the width direction (Y direction). Usually, the optical lens has a square structure, and the dimension A can simultaneously represent the dimensions of the optical lens in the length direction and the width direction. Figure 3 As shown in the structural schematic diagram of the camera module on the right, if the image side lens 3 is provided separately from the lens assembly 2, and the lens barrel 21 of the lens assembly 2 only includes an optical lens 22 with a smaller diameter, the image side lens 3 can make full use of the free space below the lens barrel 21. In this technical solution, the diameter of the lens barrel 21 will also be smaller, and its specific size is B-xx mm, which can be understood as a reduction of xx mm on the basis of size B. The specific numerical reduction in size is determined by the size of the image side lens 3. Furthermore, when the diameter of the lens barrel 21 is reduced, the overall size of the optical lens will also be reduced by xx mm on the basis of size A. Therefore, the technical solution of the present application is different from that of the present invention. Figure 3 Compared with the technical solution illustrated in the figure on the left, the diameter of the lens assembly 2 is smaller, so the size of the entire optical lens is also smaller, thereby reducing the structural size of the optical lens.

[0061] The following table shows the difference between the two solutions:

[0062] Lens XY size Optical lens XY size Lens assembly method Lens construction Unreduced size solution B A Side joint All-in-one The technical solution of this application B-xx mm A-xx mm Z-direction bonding Grouping

[0063] In the above table, the side-joint in the lens assembly method refers to the connection method between the optical lens and the focusing device, and the optical lens is bonded to the focusing device by gluing on the side. The Z-direction bonding means that the image side lens 3 is bonded to the bottom end surface of the lens barrel 21 by colloid along the height direction (opposite Z direction) of the optical lens.

[0064] In a technical solution provided in the present application, the focusing device 1 includes but is not limited to: a voice coil motor, an ultrasonic motor, a stepping motor, a memory alloy motor, etc. In a specific embodiment, taking the focusing device 1 as a focusing motor (voice coil motor) as an example, through the action of electromagnetic force, the moving part 11 can move up and down relative to the axis direction of the optical lens of the fixed part 12. The fixed part 12 has a through hole, and the ring-shaped moving part 11 is arranged in the through hole. The moving part 11 has a through mounting hole, the lens assembly 2 is arranged in the mounting hole, and the lens barrel 21 is connected to the inner wall of the mounting hole.

[0065] Further, see Figure 4 As shown, the diameter D2 of the image side lens 3 is less than the diameter D3 of the perforation. It can be understood as a side mirror. This technical solution can avoid the image side lens 3 from rubbing against the fixing part 12, affecting the movement of the image side lens 3. The diameter of the mounting hole is D1, and the diameter D2 of the image side lens 3 is less than or equal to the diameter D1 of the mounting hole. When the diameter of the image side lens 3 is equal to the diameter of the mounting hole, the image side lens 3 can be directly connected to the mounting hole of the moving part 11. When the diameter of the image side lens 3 is less than the diameter of the mounting hole, there are many situations between the diameter of the image side lens 3 and the diameter of the lens barrel 21, for example, the outer diameter of the connecting part 32 of the image side lens 3 is equal to the diameter of the lens barrel 21. For another example, the outer diameter of the connecting part 32 is less than the diameter of the lens barrel 21. Or, the outer diameter of the connecting part 32 is slightly larger than the diameter of the lens barrel 21.

[0066] In a technical solution provided by the present application, the image side lens 3 is connected to the end face of the bottom end of the lens barrel 21, and the connection method of the image side lens 3 and the moving part 11 includes but is not limited to: one of bonding, welding, clamping and connection by a fastener. For example, the image side lens 3 is bonded together by colloid, double-sided tape, etc. Or, the image side lens 3 is connected to the end face of the moving part 11 by welding methods such as ultrasonic welding and laser welding. Or, the image side lens 3 and the end face of the moving part 11 are respectively provided with a buckle structure, and the buckle structure can be matched and connected. In the technical solution provided by the present application, the image side lens 3 is bonded to the end face of the bottom end of the lens barrel 21, which is not only convenient for installing the image side lens 3, but also allows the image side lens 3 to make full use of the free space below the bottom end of the lens barrel 21, thereby further reducing the size of the optical lens.

[0067] Further, see Figure 5 and Figure 6 , the image side lens 3 includes an optical part 31 and a connecting part 32, and the annular connecting part 32 is located on the periphery of the circular optical part 31. The optical part 31 of the image side lens 3 can be considered as the optically effective area of ​​the lens, and the connecting part 32 is bonded to the annular end face at the bottom end of the movable part 11 by colloid. The optical part 31 and the connecting part 32 can be an integral structure or a structure that can be combined and connected. In order to make the connecting part 32 on the image side lens 3 more tightly connected to the lens assembly 2, the connecting surface 323 between the end face of the lens barrel 21 and the connecting part 32 can be a concave and convex surface that cooperates with each other in addition to being a plane that fits each other. In this way, the contact area between the connecting part 32 and the end face of the lens barrel 21 will also be larger, and the connection will be tighter. It should be noted that Figure 5 and Figure 6 The figure 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.

[0068] In a specific embodiment, see Figure 1 When the image side lens 3 is bonded to the lens barrel 21, the thickness h of the colloid on the end surface of the lens barrel 21 will be controlled within the range of 200 microns, thereby reducing the structural size of the optical lens in the height direction. Figure 1 In addition, in order to ensure the stable performance of the optical lens, the colloid 10 does not exceed the side of the lens barrel 21, that is, it can be considered that the colloid 10 does not overflow onto the side wall of the connecting portion 32, and the colloid 10 is spaced from the hole wall of the fixing portion 12 to avoid contact between the colloid 10 and the hole wall.

[0069] The colloid 10 includes but is not limited to: UV glue, AB glue, all-purpose glue, thermosetting dual-curing glue, double-sided tape, etc. In a specific embodiment, in order to facilitate the optical position adjustment after the image side lens 3 contacts the lens assembly 2, UV glue is usually used for bonding. When the UV glue is not cured, the optical center of the image side lens 3 can be aligned with the optical center of the lens assembly 2 through the equipment, and then the UV glue is cured by irradiation with ultraviolet light.

[0070] See also Figures 5 to 8 In one embodiment provided in the present application, a recessed structure 4 is provided on the annular end surface at the bottom of the lens barrel 21 or on the connecting portion 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 surface at the bottom of the lens barrel 21, or on the connecting surface 323 where the connecting portion 32 and the moving portion 11 are connected, or both have the recessed structure 4. Taking the recessed structure 4 provided on the connecting surface 323 of the connecting portion 32 as an example, see Figure 6 The recessed structure 4 is an annular groove formed on the connecting portion 32, or is Figure 7 As shown, the recessed structure 4 is an irregularly shaped groove provided on the connecting portion 32, or as shown in FIG. Figure 8 As shown, the recessed structure 4 is a plurality of holes and grooves opened on the connecting portion 32 .

[0071] In one embodiment, the width of the annular end surface at the bottom of the lens barrel 21 or the width of the connecting portion 32 is D. To facilitate the processing of the recessed structure 4 and achieve a better connection effect, the size of the recessed structure 4 (the width of the groove or the diameter of the hole groove) is in the range of [1 / 2D to 1 / 4D], specifically 1 / 3D.

[0072] See also Fig. 9In one embodiment provided in the present application, the connection surface 323 of the connection portion 32 is divided into an inner ring area 321 and an outer ring area 322, and the width of the inner ring area 321 is smaller than the width of the outer ring area 322. When the connection portion 32 is connected to the end surface of the lens barrel 21, both the inner ring area 321 and the outer ring area 322 on the connection surface 323 will contact the end surface of the bottom end of the lens barrel 21. The surface roughness of the inner ring area 321 is smaller than the surface roughness of the outer ring area 322. Since the inner ring area 321 is closer to the optical part 31, the surface roughness of the inner ring area 321 is set to be smaller, which can effectively prevent the colloid from overflowing from the inner ring area 321 to the optical part 31. The surface roughness of the outer ring area is larger, which can effectively improve the connection strength. In a specific embodiment, the surface roughness of the inner ring area 321 is less than 0.16 microns, and the surface roughness of the outer ring area 322 is greater than 0.8 microns. The adjustment of the roughness of the inner ring area 321 and the outer ring area 322 can be achieved by changing the design of the molding mold of the image side lens 3.

[0073] The following is a detailed introduction to the anti-stray light technology of the image side lens 3 through a stray light simulation diagram.

[0074] See also Figures 15a to 15c , the figure shows stray light spots formed on the image sensor component 7 after stray light with different incident angles is refracted by the non-effective optical areas of different optical lenses 22. Fig.15a The left figure is a simulation diagram of the path of stray light with an incident angle of 18 degrees after passing through the non-effective optical area of ​​the first optical lens 22b. Fig.15a The right picture shows stray light spots formed by stray light on the image sensor assembly 7. It can be seen that there are only a few stray light spots in the picture. Fig.15b The left figure is a simulation diagram of the path of stray light with an incident angle of 36 degrees after passing through the non-effective optical area of ​​the third optical lens 22c. Fig.15b The right picture shows stray light spots formed by stray light on the image sensor assembly 7. It can be seen that there are many stray light spots in the picture. Fig.15c The left figure is a simulation diagram of the path of stray light with an incident angle of 32 degrees after passing through the non-effective optical area of ​​the fourth optical lens 22d. Fig.15c The right figure shows the stray light spots formed on the image sensor assembly 7 by stray light. It can be seen that the stray light spots in the figure have increased a lot. Therefore, it can be inferred that after the stray light is refracted through the ineffective optical area of ​​the optical lens 22 closer to the image sensor assembly 7, 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, after the stray light is refracted through the ineffective optical area (connecting portion 32) of the image side lens 3, it will inevitably generate more stray light spots on the image sensor assembly 7. Therefore, it is very important to prevent stray light from entering the ineffective area of ​​the image side lens 3.

[0075] Furthermore, since the outer side of the image side lens 3 is not covered by the lens barrel 21, stray light leaking from the active gap of the focusing device 1 can enter the optical part 31 from the connecting part 32, thereby generating many stray light spots on the image sensor assembly 7, affecting the imaging quality of the optical part 31. Figure 5 and Fig.10 In one embodiment provided in the present application, the connection portion 32 also has a back surface opposite to the connection surface 323, and a light shielding structure 6 is provided on the back surface and the side wall of the connection portion 32. The light shielding structure 6 can be a light shielding sheet bonded to the surface of the connection portion 32, or a black coating applied to the surface of the connection portion 32. Furthermore, in order to effectively block stray light from entering the connection portion 32 of the image side lens 3, it can also be achieved by reducing the active gap of the focusing device 1, blackening the side wall of the focusing device 1, or sticking a Mylar sheet on the easy-to-reflective surface of the focusing device 1.

[0076] See also Figures 11a to 11c In the embodiment provided in the present application, usually a plurality of optical lenses 22 are stacked and installed in the lens barrel 21 in sequence, a limiting portion 17 is provided on the top of the lens barrel 21, and the first optical lens 22b abuts against the limiting portion 17, so that it is limited in the lens barrel 21, and then the plurality of optical lenses 22 are stacked in sequence and abut against each other, and the last optical lens 22a is connected to the inner wall of the lens barrel 21, so that the plurality of optical lenses 22 are limited in the lens barrel 21.

[0077] For the connection method of the last optical lens 22a and the lens barrel 21, the present application provides a variety of technical solutions. For example, see Fig.11a , the last optical lens 22a can be bonded to the inner wall of the lens barrel 21 by means of the colloid 10. Specifically, after the lens is installed in the lens barrel 21, the colloid 10 is then dotted on the outer edge of the lens, and after the colloid 10 is cured, the lens and the lens barrel 21 can be connected. Fig.11b The last optical lens 22a can be fixed on the lens barrel 21 by the pressing ring 15. Specifically, the pressing ring 15 can be connected with the inner wall of the lens barrel 21. The pressing ring 15 is located below the last optical lens 22a and directly abuts against the outer edge of the last optical lens 22a.

[0078] See also, for example, Fig.11cWhen the last optical lens 22a is connected to the lens barrel 21 through the colloid 10, a light shielding sheet 18 and a spacer 16 can be arranged between the colloid 10 and the bottom end of the last optical lens 22a. Specifically, the light shielding sheet 18 is directly connected to the bottom end surface of the last optical lens 22a, and then the spacer 16 is arranged below the light shielding sheet 18 and abuts against the light shielding sheet 18, and the colloid 10 is dotted below the spacer 16, and the colloid 10 is respectively connected to the spacer 16 and the inner wall of the lens barrel 21, so that the last optical lens 22a, the light shielding sheet 18 and the spacer 16 are limited in the lens barrel 21.

[0079] In one embodiment of the present application, an assembly method of an optical lens is also provided, and the assembly method is applicable to the optical lens described in any of the above embodiments. The assembly method of the optical lens comprises the following steps:

[0080] S101, the image side lens 3 is connected to the bottom end surface of the lens assembly to form a combined component;

[0081] S102 , connecting the combined component to the moving part 11 of the focusing device 1 .

[0082] In the above step S101, the combination component and the moving part 11 may be connected by bonding, clamping or fastening. In order to reduce the use of parts and simplify the installation steps, the combination component and the moving part 11 are usually bonded by UV glue.

[0083] In order to make the optical lens have better structural strength, a protective shell is usually set on the periphery of the optical lens, and the focusing device 1 is connected to the protective shell. There are two steps for the assembly process of these components. First, the image side lens 3 is first connected to the bottom end face of the lens assembly to form a combined component, and then the combined component is connected to the moving part 11 of the focusing device 1, and finally the entire assembly is installed in the protective shell. Second, after the lens assembly 2 is combined and connected with the focusing device 1, the combined structure is then directly installed in the protective shell, and finally the image side lens 3 is installed on the bottom end face of the lens assembly from the bottom opening of the protective shell.

[0084] In one embodiment provided in the present application, the above step: "S101, the image side lens 3 is connected to the bottom end surface of the lens assembly to form a combined component;" also includes the following steps:

[0085] S1011, roughening the bottom end surface of the lens assembly;

[0086] S1012, after aligning the optical center of the image side lens with the optical center of the lens assembly, pre-install the image side lens and the lens assembly;

[0087] S1013, coating a colloid on the bottom end surface of the lens assembly, or coating a colloid on the connecting portion of the image side lens, so that the image side lens is bonded and connected to the lens assembly;

[0088] In the above steps, the roughening of the end surface of the bottom end of the lens assembly can be achieved by surface treatment equipment. The surface treatment equipment 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.

[0089] When aligning the lens assembly 2 with the lens assembly, the axis of the lens assembly 2 needs to coincide with the axis of the lens assembly, so that the optical effect produced by the lens assembly 2 is better. After aligning the lens assembly 2 with the lens assembly, the two can be pre-installed by limiting each other through a clamp or a limiting device, and then UV glue can be applied on the connecting surface of the lens assembly and the lens assembly 2 through a glue dispensing device to make the two bonded and connected, and finally, by irradiating with an ultraviolet lamp and waiting for the UV water to solidify, the lens assembly 2 and the moving part 11 of the focusing device 1 can be fastened and connected.

[0090] In one embodiment provided in the present application, the above step: "S102, connecting the combined component to the moving part 11 of the focusing device 1." also includes the following steps:

[0091] S1021, roughening the surface of the moving part 11;

[0092] S1022, aligning the combined component with the moving part and fixing them in position;

[0093] S1023, applying colloid at the connection between the moving part and the combined component.

[0094] In the above steps, when the combined component is bonded to the moving part 11, it is also necessary to roughen the surface of the moving part 11 or the surface of the combined component, and after the surface roughness meets the requirements, glue is applied to the surface of the moving part 11 or the surface of the combined component. The above-mentioned surface treatment equipment can also be used to roughen the surface of the moving part 11. For the connection between the moving part 11 and the combined component by applying colloid, the colloid can be applied at one position or at multiple positions.

[0095] Combine the following Fig.12 The flowchart in the figure describes the assembly method of the optical lens in detail. It should be noted that the assembly steps of the optical lens shown in the flowchart are only one embodiment provided by the present application and do not represent the only assembly steps. Fig.12As shown, the installation process of the optical lens mainly includes two main steps. First, the image side lens 3 is connected to the bottom end surface of the lens assembly 2 to form a combined component (such as Figure 2 Then, the combined component is connected to the focusing device 1 (as shown in Figure 4 shown).

[0096] Furthermore, when the image side lens 3 is connected to the lens assembly 2, a surface treatment device is required to perform surface treatment on the connection surface between the image side lens 3 and the lens barrel 21. The surface treatment device includes but is not limited to: plasma surface treatment equipment, grinding equipment, etc., and roughening the surface of the moving part 11 can enhance the connection strength between the moving part 11 and the lens assembly 2.

[0097] After the surface treatment is completed, the image side lens 3 and the lens assembly can be optically aligned and then pre-assembled. After that, the colloid can be coated on the connection surface of the image side lens 3 and the lens assembly, and then the image side lens 3 and the lens assembly are bonded and assembled. Then, after the colloid is pre-cured, the entire assembly is placed in an oven for baking.

[0098] After the image side lens 3 is connected to the lens assembly 2, the combined component needs to be installed on the moving part 11 of the focusing device 1. Specifically, the combined component is first placed in the mounting hole of the moving part 11, and then the combined component and the moving part 11 are aligned and adjusted, and the two are fixed by a clamp, a limit device, etc., and then the colloid can be filled between the side wall of the lens barrel 21 and the hole wall of the mounting hole. The combined component is connected to the focusing device through the colloid 10, and the installation is completed after the colloid is solidified. In addition, in order to make the connection between the combined component and the mounting hole more firmly, before the moving part 11 is bonded to the combined component, the hole wall of the mounting hole of the moving part 11 or the outer wall of the lens barrel 21 needs to be processed by a surface treatment device to make the connection surface rough, so that the bonding through the colloid 10 is more firm.

[0099] Further, see Figure 1 , multiple positions on the combined component are bonded to the hole wall of the mounting hole, for example, when the combined component is connected to the mounting hole of the mobile part 11 at two positions, the first connection position is located on the side wall of the upper end of the lens barrel 21, and the second connection position is located on the side wall of the lower end of the lens barrel 21. The specific installation steps are: first, the colloid 10 is applied at the first position, and after the colloid is cured, the combined component is preliminarily connected to the mounting hole, and then the colloid 10 is also filled between the side wall of the lower end of the lens barrel 21 and the hole wall of the mounting hole, and after the colloid is cured, the combined component is completely connected to the mounting hole. The colloid located on the side wall of the lower end of the lens barrel 21 also covers the side wall of the image side lens 3, and this connection mode can not only make the connection between the lens barrel 21 and the mounting hole more firm, but also can reinforce the image side lens 3, so that the image side lens 3 is not easy to be separated from the lens barrel 21.

[0100] See also Fig.13 In one embodiment of the present application, an electronic device is also provided, the electronic device includes a device body 100 and at least one camera module, and the camera module can be used for shooting videos and pictures. Usually, the device body 100 of the electronic device has a hollow inner cavity, and the camera module, circuit board and power supply components are all arranged in the inner cavity. A light-transmitting hole 40 is provided on the surface of the device body 100, and the camera module is arranged corresponding to the light-transmitting hole 40, so that the external environment of the electronic device can be photographed or filmed through the light-transmitting hole 40.

[0101] The electronic device includes but is not limited to: mobile phones, tablet computers, laptop computers, cameras, vehicle-mounted devices, wearable devices, virtual reality devices, etc. Taking the electronic device as a mobile phone as an example, the camera module can be a front camera or a rear camera on the mobile phone. The front camera can take pictures or videos of the external environment through the light-transmitting hole 40 on the screen, and the rear camera can take pictures or videos of the external environment through the camera hole on the back cover of the mobile phone.

[0102] Fig.13 A three-dimensional structural diagram of a mobile phone provided in an embodiment of the present application, see Fig.13 In one embodiment provided in the present application, a plurality of camera holes are provided on the rear cover plate 101 of the mobile phone, 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 rear cover plate of the mobile phone also includes a decorative cover plate 102, and the camera holes are provided on the decorative cover plate 102. A lens protection glass is also provided at the position corresponding to the camera hole on the decorative cover plate 102, and external light can enter the camera module through the lens protection glass.

[0103] It should be noted that Fig.13 The electronic device is only schematically shown in one structure, and the actual shape, size, position and structure of each component on the electronic device are not subject to any restriction. Fig.14 In some other embodiments, the cover plate of the electronic device may not include a decorative cover plate, and the lens protection glass may also be an integrated structure with the rear cover plate of the mobile phone.

[0104] See also Fig.14In one embodiment of the present application, a camera module is also provided, which is suitable for the electronic device mentioned above, and 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 realizing the generation of digital images. Usually, the image sensor assembly 7 has an image center, and a clear digital image can only be generated when the external light is focused on the image center. When the optical lens is combined and connected with the image sensor assembly 7, it is often necessary to set the optical center of the optical lens to correspond to 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.

[0105] like Fig.14 As shown, the image sensor assembly 7 includes: a photosensitive sensor 71, a circuit board, a filter 72 and other components. The photosensitive sensor is arranged on the circuit board, the filter is located between the photosensitive sensor and the optical lens, and the optical lens is connected to the top of the circuit board through a bracket 50. It should be noted that Fig.14 The components shown in and described above are only partial components of the camera module and do not constitute any limitation on the actual structure of the camera module.

[0106] In summary, in the technical solution provided by the present application, the image side lens with a relatively large size is separated from the lens assembly, and the image side lens is connected to the end of the lens assembly, and the diameter of the lens barrel in the lens assembly can also be designed to be smaller, so that the diameter of the optical lens can be effectively controlled, which helps to further reduce the overall size of the camera module using the optical lens. In addition, by controlling the thickness of the adhesive colloid, the size of the optical lens in the height direction can be reduced, which ultimately helps to further reduce the size of the camera module using the optical lens.

[0107] The above is only an exemplary embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An optical lens, characterized in that: include: A focusing device, comprising a fixed part and a movable part, wherein the movable part is movably connected to the fixed part; A lens assembly, comprising a lens barrel and a lens group arranged in the lens barrel, wherein the lens barrel is connected to the moving part; An image side lens, the image side lens being connected to the bottom end of the lens barrel; The moving part can simultaneously drive the lens assembly and the image side lens to move and focus.

2. The optical lens according to claim 1, characterized in that: The image side lens is connected to the end surface of the bottom end of the lens barrel, and the image side lens and the lens barrel are connected in one of the following ways: bonding, welding, clamping and connection through a fastener; The focusing device is a focusing motor; the moving part has a mounting hole, the lens assembly is arranged in the mounting hole, and the diameter of the image side lens is less than or equal to the diameter of the mounting hole.

3. The optical lens according to claim 2, characterized in that: The image side lens comprises an optical portion and a connecting portion, wherein the annular connecting portion is located at the periphery of the circular optical portion; The outer diameter of the connecting portion is equal to or smaller than the diameter of the lens barrel; The connecting portion is bonded to the annular end surface of the bottom end of the lens barrel through colloid.

4. The optical lens according to claim 3, characterized in that: The image side lens is located in the mounting hole; The image side lens is connected to the bottom end surface of the lens assembly to form a combined component; The combined component is arranged in the mounting hole, and the combined component is connected to the hole wall of the mounting hole through the colloid; The colloid is filled between the side wall of the upper end of the lens barrel and the hole wall of the mounting hole.

5. The optical lens according to claim 4, characterized in that: Multiple positions on the combined component are bonded to the hole wall of the mounting hole; The colloid is filled between the side wall of the lower end of the lens barrel and the hole wall of the mounting hole; The colloid covers the side wall of the image side lens.

6. The optical lens according to claim 3, characterized in that: A recessed structure is provided on the annular end surface at the bottom of the lens barrel or on the connecting portion, the width of the annular end surface or the connecting portion is D, and the size of the recessed structure ranges from [1 / 2D to 1 / 4D].

7. The optical lens according to claim 3, characterized in that: The connection surface of the connection portion is divided into an inner ring area and an outer ring area. The surface roughness of the inner ring region is smaller than the surface roughness of the outer ring region.

8. The optical lens according to claim 7, characterized in that: The connecting portion also has a back surface opposite to the connecting surface, and a light shielding structure is provided on the back surface and the side wall of the connecting portion.

9. A camera module, characterized in that: include Image sensor assembly; The optical lens according to any one of claims 1 to 8, wherein the optical center of the optical lens is arranged 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 claimed in claim 9, wherein a light-transmitting hole is provided on the surface of the device body, and the camera module is arranged in the inner cavity of the device body corresponding to the light-transmitting hole.

Images