Lens combination methods, devices and lens groups

Abstract

This application relates to the field of optical element technology and aims to solve the technical problem of poor imaging effect in some known lens assembly methods, providing a lens assembly method, apparatus, and lens assembly. The lens assembly method is used to fix a first lens to a second lens. The first lens includes a first optical part and a first connecting part disposed at the edge of the first optical part. The second lens includes a second optical part and a second connecting part disposed at the edge of the second optical part. The first optical part has a first bonding surface, and the second optical part has a second bonding surface. The lens assembly method includes: heating the first lens and softening it; pressing the softened first lens onto the second lens, bonding the first bonding surface to the second bonding surface, and thermally fusing the first connecting part to the second connecting part. The beneficial effect of this application is to improve the accuracy of the first bonding surface bonding to the second bonding surface, thereby improving the imaging effect of the lens assembly.

Description

Technical Field

[0001] This application relates to the field of optical element technology, and more specifically, to lens combination methods, devices, and lens groups. Background Technology

[0002] In the known lens assembly manufacturing process, adjacent lenses are usually bonded together with water-based adhesive, resulting in a gap between the two opposing surfaces of the two lenses. The thickness of the gap varies at different points, which can easily lead to non-parallelism or eccentricity between the two surfaces. This causes the optical path through the lens assembly to fail to meet the preset requirements, affecting the MTF value of the lens assembly and making the lens assembly prone to imaging distortion defects. Summary of the Invention

[0003] This application provides a lens combination method, apparatus, and lens group to solve the technical problem of poor imaging effect in some known lens group combination methods.

[0004] The embodiments of this application are implemented as follows:

[0005] In a first aspect, this application provides a lens bonding method for fixing a first lens to a second lens. The first lens includes a first optical portion and a first connecting portion disposed at the edge of the first optical portion. The second lens includes a second optical portion and a second connecting portion disposed at the edge of the second optical portion. The first optical portion has a first mating surface, and the second optical portion has a second mating surface. The lens bonding method includes: heating the first lens and softening it; pressing the softened first lens onto the second lens, and mating the first mating surface with the second mating surface, and thermally fusing the first connecting portion to the second connecting portion.

[0006] When connecting the first lens and the second lens using the lens combination method of this application, the first optical part of the first lens is heated to a first preset temperature, which is lower than the melting point of the material of the first optical part. This softens the first optical part, meaning it possesses a certain degree of plasticity and can undergo plastic deformation under external force. After pressing the softened first optical part onto the second bonding surface of the second optical part, the second bonding surface of the second optical part remains fixed, allowing the softened first bonding surface of the first optical part to deform and fit tightly and accurately with the second bonding surface. This significantly reduces the possibility of gaps between the first and second bonding surfaces, significantly improving their overlap. As a result, light propagating between the first and second lenses can meet the target requirements of the optical path without being deflected due to foreign objects, non-parallelism, or other factors, thereby improving the imaging quality of the lens group formed by connecting the first and second lenses.

[0007] Simultaneously, by heating the first connecting part to a second preset temperature, which is not lower than the melting point of the material of the first connecting part, the first connecting part is locally heat-melted. After the heat-melted first connecting part comes into contact with the second connecting part, the heat can be conducted to the second connecting part, causing the temperature of the second connecting part to rise and producing microscopic changes at the joint, thus achieving a heat-melted connection between the first and second connecting parts. This ensures a stable and reliable connection between the first and second lenses, better guaranteeing the overall reliability of the lens assembly formed by the combined first and second lenses.

[0008] In one possible implementation:

[0009] The step of heating and softening the first lens includes: heating the first lens and making the temperature of the first connecting part greater than or equal to the bonding temperature, the bonding temperature being a temperature at which the first connecting part and the second connecting part can be thermally fused together, and making the temperature of the first optical part greater than or equal to the thermoplastic temperature, the thermoplastic temperature being a temperature at which the first optical part can be softened and less than the bonding temperature.

[0010] In one possible implementation:

[0011] The step of heating the first lens includes: setting a heating component on the side of the first lens away from the second lens, setting a heat insulation part between the heating component and the first optical part, controlling the heating component to generate heat, and the heat insulation part being used to isolate the heat conducted by the heating component to the first optical part.

[0012] In one possible implementation:

[0013] The step of pressing the first lens onto the second lens includes: simultaneously pressing the first optical part onto the second optical part and pressing the first connecting part onto the second connecting part.

[0014] Secondly, this application provides a lens bonding apparatus for performing the aforementioned lens bonding method. The lens bonding apparatus includes a positioning mold, a pressing mold, and a heating assembly. The positioning mold has a positioning groove for receiving the second lens. The pressing mold has a pressing groove for receiving the first lens. The opening of the pressing groove is opposite to the opening of the positioning groove. The pressing mold is also used to press against the positioning mold so that the softened first optical portion of the first lens fits against the second optical portion of the second lens, and the first connecting portion of the first lens is thermally fused to the second connecting portion of the second lens. The heating assembly is used to heat the first lens and soften it.

[0015] In one possible implementation:

[0016] The pressing mold is provided with a heat-insulating component, which is used to heat the pressing mold so that the temperature difference between the pressing mold and the heated first optical part is kept within a preset range, and the temperature of the pressing mold is lower than the temperature of the first optical part.

[0017] In one possible implementation:

[0018] The lens bonding device further includes a heat insulation section, which is disposed between the first optical section and the heating assembly to reduce the heat received by the first optical section, thereby making the temperature of the first optical section lower than the temperature of the first connecting section.

[0019] In one possible implementation:

[0020] The projection of the heat insulation part onto the first optical part is located inside the outer contour of the first optical part.

[0021] Thirdly, this application provides a lens assembly manufactured using the aforementioned lens bonding method, the lens assembly including a first lens and a second lens. The first lens includes a first optical portion and a first connecting portion, the first optical portion having a first mating surface. The second lens includes a second optical portion and a second connecting portion, the second optical portion having a second mating surface, the second mating surface being mated to the first mating surface, and the first connecting portion being thermally fused to the second connecting portion.

[0022] In one possible implementation:

[0023] The surface of the second lens is provided with a coating layer, and the surface of the coating layer forms the second bonding surface. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is one of the flowcharts for a lens combining method according to an embodiment of this application;

[0026] Figure 2 This is a second flowchart of a lens combining method according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the lens combining device and lens group according to an embodiment of this application;

[0028] Figure 4 This is a partial structural schematic diagram of a lens combining device according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the lens assembly according to an embodiment of this application.

[0030] Explanation of key component symbols:

[0031]

[0032] Detailed Implementation

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] In the known lens assembly manufacturing process, adjacent lenses are usually bonded together with water-based adhesive. However, the adhesive has a certain thickness, which can cause problems such as non-parallelism or eccentricity between the two opposing surfaces of the two lenses. This results in the optical path passing through the lens assembly failing to meet the preset requirements, affecting the MTF value of the lens assembly, and making the lens assembly prone to imaging distortion defects.

[0038] In view of this, such as Figure 1As shown, this application provides a lens combining method that enables the two opposing surfaces of two lenses to be accurately fitted together, thereby reducing the possibility of non-parallelism or eccentricity between the two surfaces, ensuring that the optical path through the lens group meets the requirements, and improving the imaging accuracy of the lens group. This will be described exemplarily below.

[0039] See Figure 1 This embodiment provides a lens bonding method for fixing a first lens 10 to a second lens 20. The first lens 10 includes a first optical part 11 and a first connecting part 12 disposed at the edge of the first optical part 11. The second lens 20 includes a second optical part 21 and a second connecting part 22 disposed at the edge of the second optical part 21. The first optical part 11 has a first bonding surface 13 and the second optical part 21 has a second bonding surface 23. The lens bonding method includes: heating the first lens 10 and softening the first lens 10; pressing the softened first lens 10 onto the second lens 20, and bonding the first bonding surface 13 to the second bonding surface 23, and thermally fusing the first connecting part 12 to the second connecting part 22.

[0040] Both the first lens 10 and the second lens 20 are made of hard materials at room temperature. By heating the first optical part 11 of the first lens 10 to a first preset temperature, which is lower than the melting point of the material of the first optical part 11, the first optical part 11 can be softened. Softening means that the first optical part 11 has a certain degree of plasticity and can undergo plastic deformation under external force. After the softened first optical part 11 is pressed onto the second mating surface 23 of the second optical part 21, since the second mating surface 23 of the second optical part 21 remains fixed, the first mating surface 13 of the softened first optical part 11 can deform and fit tightly and accurately with the second mating surface 23. This greatly reduces the possibility of gaps between the first mating surface 13 and the second mating surface 23, and significantly improves the overlap between the two. This allows light to meet the target requirements of the optical path when propagating between the first lens 10 and the second lens 20, without being deflected due to foreign objects, non-parallelism, or other factors, thereby improving the imaging quality of the lens group 100 formed by connecting the first lens 10 and the second lens 20.

[0041] Simultaneously, by heating the first connecting portion 12 to a second preset temperature, which is not lower than the melting point of the material of the first connecting portion 12, the first connecting portion 12 is partially heat-melted. After the heat-melted first connecting portion 12 comes into contact with the second connecting portion 22, the heat can be conducted to the second connecting portion 22, causing the temperature of the second connecting portion 22 to rise, and causing microscopic changes at the joint between the two, thus achieving a heat-melted connection between the first connecting portion 12 and the second connecting portion 22. This ensures a stable and reliable connection between the first lens 10 and the second lens 20, better guaranteeing the overall reliability of the lens group 100 formed by the combined first lens 10 and second lens 20.

[0042] In addition, the steps of heating the first lens 10 and pressing it onto the second lens 20 are simple and easy to perform, and do not require high stability between lens materials, thus also having the advantages of low cost and high processing efficiency.

[0043] In this embodiment, see reference. Figure 3 The first mating surface 13 is a concave surface formed from the inward concavity of the surface of the first lens 10 toward the surface of the second lens 20; the second mating surface 23 is a convex surface formed from the outward concavity of the surface of the second lens 20 toward the surface of the first lens 10. In other embodiments, the first mating surface 13 and the second mating surface 23 may be set as planes, or aspherical composite curved surfaces set according to actual optical requirements, and their specific shapes can be determined according to actual needs.

[0044] See also Figure 2 In this embodiment, the step of heating the first lens 10 and softening the first lens 10 includes: heating the first lens 10 and making the temperature of the first connecting part 12 greater than or equal to the bonding temperature, the bonding temperature being the temperature at which the first connecting part 12 and the second connecting part 22 can be thermally fused together, and making the temperature of the first optical part 11 greater than or equal to the thermoplastic temperature and less than the bonding temperature, the thermoplastic temperature being the temperature at which the first optical part 11 can be softened.

[0045] In actual operation, the bonding temperature is higher than the melting point of the material of the first connecting part 12, and the thermoplastic temperature is between the melting point and heat distortion temperature of the material of the first optical part 11. This ensures that the first optical part 11 can deform without melting. The heat distortion temperature refers to the temperature at which the material reaches a specified deformation, and it varies depending on the material. The bonding temperature and thermoplastic temperature can be adjusted according to the actual material of the first lens 10. Optionally, the material of the first lens 10 is plastic, such as PMMA, PC, CR-39, etc., which can better ensure that the first lens 10 is reliably pressed onto the second lens 20 after heating, and also has good optical properties. When the material of the first lens 10 is plastic, the bonding temperature can be set between 60°C and 300°C, and the thermoplastic temperature can be set between 60°C and 300°C.

[0046] The following uses PMMA as an example to illustrate the bonding temperature and thermoplastic temperature. The melting point of PMMA is about 160℃ and the heat distortion temperature is about 120℃. Therefore, the thermoplastic temperature can be set between 130℃ and 150℃, for example, 130℃, 135℃, 140℃, 145℃, and 150℃. The bonding temperature can be set above 160℃, for example, 160℃, 165℃, and 170℃.

[0047] See also Figure 2 In this embodiment, the step of pressing the first lens 10 onto the second lens 20 includes simultaneously pressing the first optical part 11 onto the second optical part 21 and pressing the first connecting part 12 onto the second connecting part 22. This allows the first bonding surface 13 to accurately adhere to the second bonding surface 23, and the first connecting part 12 to firmly connect to the second connecting part 22, thereby improving the bonding efficiency between the first lens 10 and the second lens 20. Of course, in other embodiments, the steps of pressing the first optical part 11 onto the second optical part 21 and pressing the first connecting part 12 and the second connecting part 22 can also be performed step-by-step. For example, when the difference between the bonding temperature and the thermoplastic temperature is large, the pressing of the first optical part 11 onto the second optical part 21 can be performed first, followed by the connection of the first connecting part 12 onto the second connecting part 22.

[0048] See also Figure 2 In this embodiment, the step of heating the first lens 10 includes: providing a heating component 50 on the side of the first lens 10 away from the second lens 20, providing a heat insulation part 60 between the heating component 50 and the first optical part 11, controlling the heating component 50 to generate heat, and the heat insulation part 60 is used to isolate the heat conducted from the heating component 50 to the first optical part 11.

[0049] The heat insulation portion 60 isolates the heat conducted from the heating assembly 50 to the first optical portion 11, ensuring that the heating rate of the first optical portion 11 is lower than that of the first connecting portion 12. Furthermore, while the temperature of the first connecting portion 12 is higher than its bonding temperature, the temperature of the first optical portion 11 remains below its bonding temperature but higher than its thermoplastic temperature. This allows for simultaneous heating of both the first optical portion 11 and the first connecting portion 12 during the heating of the first lens 10, facilitating the bonding of the first optical portion 11 to the second optical portion 21 and the connection of the first connecting portion 12 to the second connecting portion 22, thereby improving processing efficiency.

[0050] The first optical part 11 and the first connecting part 12 can be made of the same material, which can improve the processing efficiency of the first lens 10. In addition, it is also convenient to adjust the temperature of the first optical part 11 and the temperature of the first connecting part 12 during the heating of the first lens 10.

[0051] Optionally, the distance between the heat insulation part 60 and the first optical part 11 can be adjusted according to actual needs. The shape of the heat insulation part 60 can also be set according to the specific shape of the first optical part 11.

[0052] Specifically, during the heating process, the real-time temperature of the first optical part 11 and the first connecting part 12 can be monitored by the temperature detector 72. The temperature detector 72 can be a temperature sensor attached to the first optical part 11 and the first connecting part 12, or it can be a non-contact thermal imager spaced apart from the first lens 10. The specific type of the temperature detector 72 can be determined according to the actual processing requirements.

[0053] Optionally, the heating component 50 can be a non-contact heating element, such as an infrared heating lamp assembly, a heating ceramic plate, etc. In other embodiments, the heating component 50 can also be other forms of non-contact heating structure or contact heating structure.

[0054] See Figure 3 and Figure 4 This embodiment also provides a lens bonding device 200 for performing the aforementioned lens bonding method. The lens bonding device 200 includes a positioning mold 30, a pressing mold 40, and a heating assembly 50. The positioning mold 30 has a positioning groove 31 for receiving a second lens 20. The pressing mold 40 has a pressing groove 41 for receiving a first lens 10. The opening of the pressing groove 41 is opposite to the opening of the positioning groove 31. The pressing mold 40 is also used to press against the positioning mold 30 so that the softened first optical part 11 of the first lens 10 is attached to the second optical part 21 of the second lens 20, and the first connecting part 12 of the first lens 10 is thermally fused to the second connecting part 22 of the second lens 20. The heating assembly 50 is used to heat the first lens 10 and soften it.

[0055] The positioning groove 31 of the positioning mold 30 can accommodate and fix the second lens 20, so that the position and shape of the second lens 20 remain fixed during the bonding process, thereby reducing the possibility of deformation or displacement during bonding and improving the bonding accuracy of the first lens 10 and the second lens 20. In this embodiment, the positioning mold 30 can be made of graphite; in other embodiments, the material of the positioning mold 30 can be determined according to actual needs. The shape of the positioning groove 31 is contoured to the surface of the second lens 20 away from the second bonding surface 23 to improve the clamping effect of the second lens 20 and further ensure the clamping stability of the second lens 20.

[0056] The pressing mold 40 can accommodate the first lens 10. After the softened first lens 10 is placed on the second lens 20 mounted on the positioning mold 30, the pressing mold 40 is placed on the first lens 10. By applying force to the pressing mold 40, the first lens 10 is pressed against the second lens 20, thereby completing the pressing of the first lens 10 and the second lens 20, and the first mating surface 13 is mated against the second mating surface 23. The first connecting part 12 is connected to the second connecting part 22, thus completing the connection of the first lens 10 and the second lens 20. Optionally, the pressing mold 40 is provided with a pressing groove 41, which is shaped to conform to the surface of the first lens 10 away from the first mating surface 13. After the pressing mold 40 is pressed against the positioning mold 30, the pressing groove 41 and the positioning groove 31 together form a closed space, which restricts the first lens 10 and the second lens 20, ensuring that the shape of the first lens 10 and the second lens 20 remains stable and reliable after being joined.

[0057] The lens combining device 200 of this embodiment can better perform the aforementioned lens combining method, thereby improving the combining efficiency and combining quality of the first lens 10 and the second lens 20, and improving the imaging quality of the lens group 100 formed after combining.

[0058] See also Figure 3 In this embodiment, a heat-insulating member 71 is provided inside the pressing mold 40. The heat-insulating member 71 is used to heat the pressing mold 40 so that the temperature difference between the pressing mold 40 and the heated first optical part 11 is kept within a preset range, and the temperature of the pressing mold 40 is lower than the temperature of the first optical part 11. By keeping the pressing mold 40 warm by the heat-insulating member 71, the temperature difference between the pressing mold 40 and the heated first optical part 11 is small. Therefore, when the pressing mold 40 is pressed against the first lens 10, the contact surface between the first lens 10 and the pressing mold 40 will not deteriorate due to excessive temperature difference, thereby improving the protection effect on the first lens 10. The heat-insulating member 71 can heat the pressing mold 40 according to the thermoplastic temperature of the first optical part 11. For example, when the thermoplastic temperature is between 130°C and 150°C, the heat-insulating member 71 can heat the temperature of the pressing mold 40 to between 120°C and 130°C.

[0059] Optionally, the insulation component 71 includes a heating tube 71a, which is embedded inside the pressing mold 40. The heating tube 71a can be a ceramic heating tube or a resistance heating tube.

[0060] In this embodiment, the pressing mold 40 can be made of a metal with good thermal conductivity. In other embodiments, the pressing mold 40 can also be made of other materials with good thermal conductivity.

[0061] Alternatively, in this embodiment, the heating component 50 can also be placed directly on the pressing mold 40, and the first lens 10 can be heated by heating the pressing mold 40.

[0062] See Figure 3 and Figure 4 In this embodiment, the lens bonding device 200 further includes a heat insulation portion 60, which is disposed between the first optical portion 11 and the heating assembly 50 to reduce the heat received by the first optical portion 11, thereby lowering the temperature of the first optical portion 11 below the temperature of the first connecting portion 12. By providing the heat insulation portion 60, the heating assembly 50 can simultaneously heat the first optical portion 11 and the first connecting portion 12, thereby improving the heating efficiency of the first lens 10 and thus improving the bonding efficiency between the first lens 10 and the second lens 20. Optionally, the heat insulation portion 60 is connected to the heating assembly 50 to achieve a heat insulation effect.

[0063] See Figure 4 In this embodiment, the projection of the heat insulation part 60 onto the first optical part 11 is located inside the outer contour of the first optical part 11. This achieves a heat insulation effect on the peripheral area of ​​the first optical part 11 and the area between the first optical part 11 and the heating assembly 50, ensuring the temperature control effect of the first optical part 11.

[0064] Optionally, see Figure 4 The heat insulation part 60 includes a heat insulation cover 61 and a heat insulation plate 62. The heat insulation cover 61 surrounds the periphery of the first optical part 11 and is located between the first optical part 11 and the first connecting part 12. The inner side of the heat insulation cover 61 forms a first heating region Q1, and the outer side of the heat insulation cover 61 forms a second heating region Q2. The heat insulation cover 61 can reduce the heat radiated from the heating assembly 50 from the second heating region Q2 to the first heating region Q1, thereby achieving a heat insulation effect around the first optical part 11. The heat insulation plate 62 is disposed between the first optical part 11 and the heating assembly 50 to reduce the heat directly radiated from the heating assembly 50 to the surface of the first optical part 11. The heating assembly 50 has a radiating heating surface 51 facing the positioning mold 30, and the heat insulation plate 62 is parallel to the radiating heating surface 51.

[0065] The working process of the lens combining device 200 in this embodiment is as follows:

[0066] The second lens 20 is placed in the positioning groove 31 of the positioning mold 30.

[0067] The first lens 10 is heated by the heating assembly 50 and placed on the second mating surface 23 of the second lens 20; or, the first lens 10 is placed on the second mating surface 23 of the second lens 20, the first lens 10 is heated by the heating assembly 50, and the first optical part 11 is softened, so that the first connecting part 12 is thermally melted.

[0068] Remove the heating element 50 and the heat insulation part 60.

[0069] The pressing mold 40, heated by the heating tube 71a, is placed on the first lens 10, and the first lens 10 is fitted into the pressing groove 41. The pressing mold 40 is pressed onto the positioning mold 30 to press the first lens 10 onto the second lens 20, and the first bonding surface 13 is bonded to the second bonding surface 23, so that the first connecting part 12 is thermally fused to the second connecting part 22.

[0070] The pressing mold 40 and the positioning mold 30, which are pressed together, are left to stand at room temperature until their temperatures drop to room temperature. Then, the pressing mold 40 and the positioning mold 30 are separated, and the first lens 10 and the second lens 20, which are then joined together, are taken out.

[0071] See Figure 5 This embodiment also provides a lens assembly 100, manufactured using the aforementioned lens bonding method. The lens assembly 100 includes a first lens 10 and a second lens 20. The first lens 10 includes a first optical part 11 and a first connecting part 12, and the first optical part 11 has a first bonding surface 13. The second lens 20 includes a second optical part 21 and a second connecting part 22, and the second optical part 21 has a second bonding surface 23, which is bonded to the first bonding surface 13. The first connecting part 12 is thermally fused to the second connecting part 22.

[0072] The lens group 100 of this embodiment is manufactured using the aforementioned lens bonding method. The first bonding surface 13 of the first optical part 11 can be accurately and reliably bonded to the second bonding surface 23 of the second optical part 21, so that the imaging quality of the lens group 100 is good and can meet the target requirements of the optical path when propagating light.

[0073] See Figure 5 In this embodiment, the surface of the second lens 20 is provided with a coating layer 24, and the surface of the coating layer 24 forms a second bonding surface 23. After the coating layer 24, which is used for semi-reflection, is provided between the second lenses 20, when the first lens 10 and the second lens 20 are combined in a known manner, the bonding accuracy of the first bonding surface 13 and the second bonding surface 23 will further decrease, which will further reduce the yield of the lens group 100, make the image quality worse, and make the manufacturing more difficult. However, the lens group 100 of this embodiment adopts the aforementioned lens bonding method, so that the first bonding surface 13 can completely conform to the second bonding surface 23 of the coating layer 24, ensuring the parallelism and bonding reliability of the first bonding surface 13 and the second bonding surface 23, thereby improving the manufacturing quality and imaging effect of the lens group 100.

[0074] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A lens combination method, characterized in that, The lens bonding method is used to fix a first lens to a second lens. The first lens includes a first optical part and a first connecting part disposed at the edge of the first optical part. The second lens includes a second optical part and a second connecting part disposed at the edge of the second optical part. The first optical part has a first mating surface, and the second optical part has a second mating surface. The lens bonding method includes: Heating the first lens and softening the first lens; The first lens after being pressed and softened is pressed onto the second lens, and the first bonding surface is bonded to the second bonding surface, and the first connecting part is heat-fused to the second connecting part; The step of heating the first lens and softening the first lens includes: The first lens is heated, and the temperature of the first connecting part is made greater than or equal to the bonding temperature, which is the temperature at which the first connecting part and the second connecting part can be thermally fused together. The temperature of the first optical part is made greater than or equal to the thermoplastic temperature, which is the temperature at which the first optical part can be softened and is less than the bonding temperature.

2. The lens combination method according to claim 1, characterized in that: The step of heating the first lens includes: A heating component is provided on the side of the first lens away from the second lens, and a heat insulation component is provided between the heating component and the first optical part. The heating component is controlled to generate heat, and the heat insulation component is used to isolate the heat conducted by the heating component to the first optical part.

3. The lens combination method according to claim 1, characterized in that: The step of pressing the first lens onto the second lens includes: Simultaneously press the first optical part onto the second optical part and press the first connecting part onto the second connecting part.

4. A lens combining device, characterized in that, For performing the lens combining method as described in any one of claims 1 to 3, the lens combining device comprises: A positioning mold, wherein the positioning mold is provided with a positioning groove for receiving the second lens; A pressing mold, wherein the pressing mold is provided with a pressing groove for receiving the first lens; The opening of the pressing groove is opposite to the opening of the positioning groove. The pressing mold is also used to press against the positioning mold so that the softened first optical part of the first lens fits against the second optical part of the second lens, and the first connecting part of the first lens is thermally fused to the second connecting part of the second lens. A heating assembly for heating the first lens and softening the first lens.

5. The lens combining device according to claim 4, characterized in that: The pressing mold is provided with a heat-insulating component, which is used to heat the pressing mold so that the temperature difference between the pressing mold and the heated first optical part is kept within a preset range, and the temperature of the pressing mold is lower than the temperature of the first optical part.

6. The lens combining device according to claim 4, characterized in that: The lens bonding device further includes a heat insulation section, which is disposed between the first optical section and the heating assembly to reduce the heat received by the first optical section, thereby making the temperature of the first optical section lower than the temperature of the first connecting section.

7. The lens combining device according to claim 6, characterized in that: The projection of the heat insulation part onto the first optical part is located inside the outer contour of the first optical part.

8. A lens assembly, characterized in that, The lens assembly is manufactured using the lens combining method according to any one of claims 1 to 3, wherein the lens assembly comprises: A first lens, the first lens including a first optical part and a first connecting part, the first optical part having a first mating surface; The second lens includes a second optical part and a second connecting part. The second optical part has a second bonding surface, which is bonded to the first bonding surface. The first connecting part is thermally fused to the second connecting part.

9. The lens assembly according to claim 8, characterized in that, The lens group also includes: The surface of the second lens is provided with a coating layer, and the surface of the coating layer forms the second bonding surface.

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