TWI882405B - Lens combination methods, devices and lens set - Google Patents

Abstract

The present application relates to the field of optical component technology and aims to solve the technical problem of poor imaging effect of some known combination methods of lens set by providing lens combination methods, devices and lens set. The lens combination method is used for fixing a first lens to a second lens, the first lens comprising a first optical portion and a first connecting portion disposed at an edge of the first optical portion, the second lens comprising a second optical portion and a second connecting portion disposed at an edge of the second optical portion, the first optical portion having a first fitting surface, and the second optical portion having a second fitting surface, and the lens combination method comprises: heating the first lens and softening the first lens; pressing the softened first lens onto the second lens, and adhering the first fitting surface to the second fitting surface, and thermally fusing the first connection portion to the second connection portion. The beneficial effect of the present application is to improve the accuracy of the first laminating surface being affixed to the second laminating surface, and to improve the imaging effect of the lens set.

Description

Lens combining method, device and lens assembly

The present application relates to the field of optical element technology, and more specifically, to a lens assembly method, device and lens assembly.

In the known processing of a lens assembly, two adjacent lenses are usually connected by hydrogel bonding, so that there is a gap between the two surfaces of the two lenses that are relatively set, and the thickness of the gap is different at different places, which makes it easy for the two surfaces to be non-parallel or eccentric, resulting 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.

The present application provides a lens combining method, device and lens assembly to solve the technical problem of poor imaging effect of some known lens assembly combining methods.

The embodiment of this application is implemented as follows:

In a first aspect, the present application provides a lens bonding method, which is used to fix a first lens to a second lens, wherein the first lens includes a first optical portion and a first connecting portion arranged at an edge of the first optical portion, and the second lens includes a second optical portion and a second connecting portion arranged at an edge of the second optical portion, the first optical portion has a first bonding surface, and the second optical portion has a second bonding surface. The lens bonding method includes: heating the first lens to soften the first lens; pressing the softened first lens to the second lens, and bonding the first bonding surface to the second bonding surface, and hot-melt-connecting the first connecting portion to the second connecting portion.

When the lens bonding method of the present application is used to connect the first lens and the second lens, the first optical part of the first lens is heated to a first preset temperature, and the first preset temperature is lower than the melting point of the material of the first optical part, so that the first optical part can be softened. Softening means that the first optical part has a certain plasticity and can undergo plastic deformation under the action of external force. After the softened first optical part is pressed onto the second bonding surface of the second optical part, since the second bonding surface of the second optical part remains in a fixed state, the first bonding surface of the softened first optical part can be deformed and closely and accurately bonded to the second bonding surface, which greatly reduces the possibility of a gap between the first bonding surface and the second bonding surface, and significantly improves the overlap between the two, so that the light can meet the target requirements of the optical path when propagating between the first lens and the second lens, and will not be offset due to factors such as foreign matter and non-parallelism, thereby improving the imaging quality of the lens group formed by connecting the first lens and the second lens.

At the same time, by heating the first connection part to a second preset temperature, the second preset temperature is not lower than the melting point of the material of the first connection part, so that the first connection part is partially heat-melted. After the heat-melted first connection part abuts against the second connection part, the temperature can be transferred to the second connection part, so that the temperature of the second connection part is increased, and the bonding place of the two parts is microscopically changed, and the heat-melting connection between the first connection part and the second connection part is realized, so that the first lens and the second lens can be stably and reliably connected, and the overall reliability of the lens set formed by the first lens and the second lens after the combination is better guaranteed.

In one possible implementation:

The step of heating the first lens 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 melt-connected, 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 is lower than the bonding temperature.

In one possible implementation:

The step of heating the first lens includes: setting a heating assembly on a side of the first lens far away from the second lens, setting a heat insulating part between the heating assembly and the first optical part, controlling the heat generated by the heating assembly, and the heat insulating part is used to isolate the heat conducted from the heating assembly to the first optical part.

In one possible implementation:

The step of pressing the first lens onto the second lens includes: simultaneously pressing the first optical portion onto the second optical portion and pressing the first connecting portion onto the second connecting portion.

In a second aspect, the present application provides a lens bonding device for performing the aforementioned lens bonding method, the lens bonding device comprising a positioning mold, a pressing mold and a heating assembly. The positioning mold is provided with a positioning groove, the positioning groove is used to accommodate the second lens. The pressing mold is provided with a pressing groove, the pressing groove is used to accommodate the first lens. The opening of the pressing groove is arranged opposite to the opening of the positioning groove, and the pressing mold is also used to press against the positioning mold so that the softened first optical part of the first lens is attached to the second optical part of the second lens, and the first connecting part of the first lens is hot-melt connected to the second connecting part of the second lens. The heating assembly is used to heat the first lens and soften the first lens.

In one possible implementation:

A heat-insulating component is provided in the pressing mold, and the heat-insulating component is used to heat the pressing mold so that the difference between the temperature of the pressing mold and the temperature of the first optical part after heating is maintained within a preset range, and the temperature of the pressing mold is lower than the temperature of the first optical part.

In one possible implementation:

The lens coupling device also includes an insulating portion, which is used to be arranged between the first optical portion and the heating assembly to reduce the heat received by the first optical portion, thereby making the temperature of the first optical portion lower than the temperature of the first connecting portion.

In one possible implementation:

The projection of the heat insulation part on the first optical part is located on the inner side of the outer contour of the first optical part.

In a third aspect, the present application provides a lens assembly, which is manufactured by the lens bonding method described above, and the lens assembly includes a first lens and a second lens. The first lens includes a first optical portion and a first connecting portion, and the first optical portion has a first bonding surface. The second lens includes a second optical portion and a second connecting portion, and the second optical portion has a second bonding surface, and the second bonding surface is bonded to the first bonding surface, and the first connecting portion is hot-melt connected to the second connecting portion.

In one possible implementation:

The surface of the second lens is provided with a coating layer, and the surface of the coating layer forms the second bonding surface.

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the directions or positions are based on the directions or positions shown in the attached drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must be. The term "first" or "second" is used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the present application, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.

The disclosure below provides many different implementations or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application may repeat reference numerals and/or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various implementations and/or settings discussed in itself. In addition, the present application provides examples of various specific processes and materials, but ordinary technicians in this field can recognize the application of other processes and/or the use of other materials.

Referring to FIG. 1 , this embodiment provides a lens bonding method, which is used to fix a first lens 10 to a second lens 20. The first lens 10 includes a first optical portion 11 and a first connecting portion 12 disposed at an edge of the first optical portion 11, and the second lens 20 includes a second optical portion 21 and a second connecting portion 22 disposed at an edge of the second optical portion 21. The first optical portion 11 has a first bonding surface 13, and the second optical portion 21 has a second bonding surface 23. The lens bonding method includes: heating the first lens 10 to soften the first lens 10; pressing the softened first lens 10 to the second lens 20, and bonding the first bonding surface 13 to the second bonding surface 23, and hot-melting the first connecting portion 12 to the second connecting portion 22.

The first lens 10 and the second lens 20 are both 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 plasticity and can undergo plastic deformation under the action of external force. After the softened first optical part 11 is pressed onto the second bonding surface 23 of the second optical part 21, since the second bonding surface 23 of the second optical part 21 remains fixed, the first bonding surface 13 of the softened first optical part 11 can be deformed and closely and accurately bonded to the second bonding surface 23, which greatly reduces the possibility of a gap between the first bonding surface 13 and the second bonding surface 23, and significantly improves the overlap between the two, so that when light propagates between the first lens 10 and the second lens 20, it can meet the target requirements of the optical path, and will not be offset due to factors such as foreign matter and non-parallelism, thereby improving the imaging quality of the lens assembly 100 formed by connecting the first lens 10 and the second lens 20.

At the same time, by heating the first connection part 12 to a second preset temperature, the second preset temperature is not lower than the melting point of the material of the first connection part 12, so that the first connection part 12 is partially melted. After the first connection part 12 after heat melting abuts against the second connection part 22, the temperature can be transferred to the second connection part 22, so that the temperature of the second connection part 22 is increased, and the bonding part of the two is microscopically changed, and the heat melting connection of the first connection part 12 and the second connection part 22 is realized, so that the first lens 10 and the second lens 20 can be kept stably and reliably connected, and the overall reliability of the lens assembly 100 formed by the first lens 10 and the second lens 20 after the combination is better guaranteed.

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, thereby also having the advantages of low cost and high processing efficiency.

In this embodiment, please refer to FIG. 3 , the first bonding surface 13 is a concave surface formed by the surface of the first lens 10 facing the second lens 20 being concave inwardly; the second bonding surface 23 is a convex surface formed by the surface of the second lens 20 facing the first lens 10 being convex outwardly. In other embodiments, the first bonding surface 13 and the second bonding surface 23 can be set as a plane, or aspherical composite curved surfaces set according to actual optical requirements, etc., and their specific shapes can be determined according to actual requirements.

Referring to FIG. 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 portion 12 greater than or equal to the bonding temperature, the bonding temperature being a temperature at which the first connecting portion 12 and the second connecting portion 22 can be thermally melt-connected, and making the temperature of the first optical portion 11 greater than or equal to the thermoplastic temperature and less than the bonding temperature, the thermoplastic temperature being a temperature at which the first optical portion 11 can be softened.

In the actual operation process, the bonding temperature is greater than the melting point of the material of the first connecting part 12, and the thermoplastic temperature is between the melting point temperature and the thermal deformation temperature of the material of the first optical part 11, which can ensure that the first optical part 11 can be deformed and will not melt. The thermal deformation temperature refers to the temperature corresponding to the material when the specified deformation is reached, which varies according to different materials. The bonding temperature and the 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, for example, it can be PMMA, PC, CR-39, etc., which can better realize that the first lens 10 is reliably pressed onto the second lens 20 after heating, and also has better 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.

The bonding temperature and the thermoplastic temperature are explained below by taking the material of the first lens 10 as polymethyl methacrylate (PMMA) as an example. The melting point of PMMA is about 160°C and the thermal deformation temperature is about 120°C. The thermoplastic temperature can be set between 130°C and 150°C, for example, 130°C, 135°C, 140°C, 145°C, 150°C. The bonding temperature can be set above 160°C, for example, 160°C, 165°C, 170°C, etc.

Please refer to FIG. 2 . In this embodiment, the step of pressing the first lens 10 to the second lens 20 includes: pressing the first optical part 11 to the second optical part 21 and pressing the first connecting part 12 to the second connecting part 22 at the same time. In this way, the first bonding surface 13 can be accurately bonded to the second bonding surface 23, and the first connecting part 12 can be stably connected to the second connecting part 22, thereby improving the bonding efficiency of the first lens 10 and the second lens 20. Of course, in other embodiments, the step of pressing the first optical part 11 to the second optical part 21 and the step of pressing the first connecting part 12 to the second connecting part 22 can also be performed in steps. For example, when the bonding temperature and the thermoplastic temperature are significantly different, the first optical portion 11 and the second optical portion 21 may be pressed together first, and then the first connecting portion 12 and the second connecting portion 22 may be connected.

Please refer to Figure 2. In this embodiment, the step of heating the first lens 10 includes: setting a heating component 50 on a side of the first lens 10 away from the second lens 20, setting a heat insulating portion 60 between the heating component 50 and the first optical portion 11, controlling the heat generated by the heating component 50, and the heat insulating portion 60 is used to isolate the heat transferred from the heating component 50 to the first optical portion 11.

The heat transfer from the heating assembly 50 to the first optical part 11 is isolated by the heat insulating part 60, so that the temperature rise rate of the first optical part 11 is lower than the temperature rise rate of the first connecting part 12, and when the temperature of the first connecting part 12 is higher than its bonding temperature, the temperature of the first optical part 11 is lower than the bonding temperature and higher than the thermoplastic temperature. In this way, when the first lens 10 is heated, the first optical part 11 and the first connecting part 12 can be heated at the same time, so that the first optical part 11 can be attached to the second optical part 21, and the first connecting part 12 can be connected to the second connecting part 22, thereby improving the processing efficiency.

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 process of the first lens 10.

Optionally, the distance between the heat insulating portion 60 and the first optical portion 11 can be adjusted according to actual needs. The shape of the heat insulating portion 60 can also be set according to the specific shape of the first optical portion 11.

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 set as a temperature sensor attached to the first optical part 11 and the first connecting part 12, or it can be set as 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 actual processing requirements.

Optionally, the heating assembly 50 can be configured as a non-contact heating element, for example, the heating assembly 50 can be configured as an infrared heating lamp assembly, a heating ceramic plate, etc. In other embodiments, the heating assembly 50 can also be configured as other forms of non-contact heating structures or contact heating structures.

Please refer to FIG. 3 and FIG. 4 together. 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 compression mold 40, and a heating assembly 50. The positioning mold 30 is provided with a positioning groove 31, and the positioning groove 31 is used to accommodate the second lens 20. The compression mold 40 is provided with a compression groove 41, and the compression groove 41 is used to accommodate the first lens 10. The opening of the pressing groove 41 is arranged 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 portion 11 of the first lens 10 is attached to the second optical portion 21 of the second lens 20, and the first connecting portion 12 of the first lens 10 is hot-melt connected to the second connecting portion 22 of the second lens 20. The heating assembly 50 is used to heat the first lens 10 and soften the first lens 10.

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 the bonding process, and further 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 configured to be contoured with 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.

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 a 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. The first bonding surface 13 is bonded to the second bonding surface 23, and the first connecting portion 12 is connected to the second connecting portion 22. In this way, the connection between the first lens 10 and the second lens 20 is completed. Optionally, the pressing mold 40 is provided with a pressing groove 41, and the pressing groove 41 is configured to conform to the surface of the first lens 10 away from the first bonding surface 13. After the pressing mold 40 is pressed onto the positioning mold 30, the pressing groove 41 and the positioning groove 31 together enclose a closed space to limit the first lens 10 and the second lens 20, thereby ensuring that the shapes of the first lens 10 and the second lens 20 after being combined remain stable and reliable.

By using the lens combining device 200 of this embodiment, the aforementioned lens combining method can be better performed, 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 assembly 100 formed after combining.

Please refer to FIG. 3 . In this embodiment, a heat preservation member 71 is provided in the press mold 40. The heat preservation member 71 is used to heat the press mold 40 so that the difference between the temperature of the press mold 40 and the temperature of the heated first optical part 11 is maintained within a preset range and the temperature of the press mold 40 is lower than the temperature of the first optical part 11. The heat preservation member 71 is used to keep the press mold 40 warm so that the temperature difference between the press mold 40 and the heated first optical part 11 is small. Therefore, when the press mold 40 is pressed on the first lens 10, the contact surface between the first lens 10 and the press mold 40 will not deteriorate due to excessive temperature difference, thereby improving the protection effect of the first lens 10. The heat preservation member 71 can heat the compression mold 40 according to the thermoplastic temperature of the first optical portion 11. For example, when the thermoplastic temperature is between 130°C and 150°C, the heat preservation member 71 can heat the temperature of the compression mold 40 to between 120°C and 130°C.

Optionally, the heat-insulating member 71 includes a heating tube 71a, and the heating tube 71a is embedded in the compression mold 40. The heating tube 71a can be a ceramic heating tube or a resistance heating tube.

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

Optionally, in this embodiment, the heating assembly 50 may also be directly placed on the compression mold 40, and the first lens 10 may be heated by heating the compression mold 40.

Please refer to FIG. 3 and FIG. 4 together. In this embodiment, the lens bonding device 200 further includes a heat insulating portion 60, which is used to be disposed between the first optical portion 11 and the heating assembly 50 to reduce the amount of heat received by the first optical portion 11, thereby making the temperature of the first optical portion 11 lower than the temperature of the first connecting portion 12. By providing the heat insulating portion 60, the heating assembly 50 can heat the first optical portion 11 and the first connecting portion 12 simultaneously, thereby improving the heating efficiency of the first lens 10, and thereby improving the bonding efficiency of the first lens 10 and the second lens 20. Optionally, the heat insulating portion 60 is connected to the heating assembly 50 to achieve a heat insulating effect.

Please refer to FIG. 4 . In this embodiment, the projection of the heat insulating portion 60 on the first optical portion 11 is located inside the outer contour of the first optical portion 11 . This is to achieve a heat insulating effect on the surrounding area of the first optical portion 11 and the area between the first optical portion 11 and the heating assembly 50 , thereby ensuring the temperature control effect of the first optical portion 11 .

Optionally, please refer to FIG. 4 , the heat insulation part 60 includes a heat insulation cover 61 and a heat insulation board 62. The heat insulation cover 61 is arranged around 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 area Q1, and the outer side of the heat insulation cover 61 forms a second heating area Q2. The heat insulation cover 61 can reduce the heat radiated from the second heating area Q2 to the first heating area Q1 by the heating assembly 50, thereby achieving a heat insulation effect around the first optical part 11. The heat insulation board 62 is arranged between the first optical part 11 and the heating assembly 50 to reduce the heat radiated directly from the heating assembly 50 to the surface of the first optical part 11. The heating assembly 50 has a radiation heating surface 51 facing the positioning mold 30 , and the heat insulation plate 62 is parallel to the radiation heating surface 51 .

The working process of the lens combination device 200 of this embodiment is as follows:

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

The first lens 10 is heated by the heating assembly 50 and placed on the second bonding surface 23 of the second lens 20; or, the first lens 10 is placed on the second bonding surface 23 of the second lens 20, and the first lens 10 is heated by the heating assembly 50, and the first optical portion 11 is softened, so that the first connecting portion 12 is heat-melted.

The heating assembly 50 and the insulation 60 are removed.

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 on the positioning mold 30 to press the first lens 10 on 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 hot-melt connected to the second connecting part 22.

The pressing mold 40 and the positioning mold 30 pressed together are placed at room temperature until the temperature of both of them drops to room temperature, the pressing mold 40 and the positioning mold 30 are separated, and the combined first lens 10 and the second lens 20 are taken out.

Please refer to FIG. 5 . This embodiment also provides a lens assembly 100, which is manufactured by the lens bonding method described above. The lens assembly 100 includes a first lens 10 and a second lens 20. The first lens 10 includes a first optical portion 11 and a first connecting portion 12. The first optical portion 11 has a first bonding surface 13. The second lens 20 includes a second optical portion 21 and a second connecting portion 22. The second optical portion 21 has a second bonding surface 23. The second bonding surface 23 is bonded to the first bonding surface 13. The first connecting portion 12 is connected to the second connecting portion 22 by hot melt.

The lens assembly 100 of this embodiment is manufactured by the aforementioned lens bonding method, and 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 assembly 100 is better and the target requirements of the optical path can be met when transmitting light.

Please refer to FIG. 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 used as a semi-transparent coating is provided between the second lens 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 be further reduced, so that the yield of the lens assembly 100 will be further reduced, the imaging quality will be worse, and the processing difficulty will be higher. The lens assembly 100 of this embodiment adopts the aforementioned lens bonding method, so that the first bonding surface 13 can be completely contoured 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 processing quality and imaging effect of the lens assembly 100.

It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached patent scope rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the patent scope in the present application.

In summary, the present invention meets the patent requirements and a patent application is filed in accordance with the law. However, the above is only a preferred embodiment of the present invention. Any equivalent modification or variation made by a person familiar with the art of the present invention according to the spirit of the present invention should be included in the scope of the patent application as follows.

100: Lens assembly 10: First lens 11: First optical part 12: First connecting part 13: First bonding surface 20: Second lens 21: Second optical part 22: Second connecting part 23: Second bonding surface 24: Coating layer 200: Lens bonding device 30: Positioning mold 31: Positioning groove 40: Pressing mold 41: Pressing groove 50: Heating assembly 51: Radiation heating surface 60: Insulation part 61: Insulation cover 62: Insulation board 71: Insulation element 71a: Heating tube 72: Temperature detector Q1: First heating area Q2: Second heating area

FIG1 is a flow chart of a lens bonding method according to an embodiment of the present application;

FIG2 is a second flow chart of the lens bonding method of the first embodiment of the present application;

FIG3 is a schematic structural diagram of a lens combination device and a lens assembly according to an embodiment of the present application;

FIG4 is a partial structural schematic diagram of a lens combination device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a lens assembly according to an embodiment of the present application.

10: First lens 11: First optical part 12: First connecting part 13: First bonding surface 20: Second lens 21: Second optical part 22: Second connecting part 23: Second bonding surface 24: Coating layer 200: Lens bonding device 30: Positioning mold 31: Positioning groove 40: Pressing mold 41: Pressing groove 50: Heating assembly 51: Radiation heating surface 60: Insulation part 61: Insulation cover 62: Insulation board 71: Insulation element 71a: Heating tube 72: Temperature detector

Claims (9)

A lens bonding method, the improvement of which is 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 arranged at the edge of the first optical part, the second lens includes a second optical part and a second connecting part arranged 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 bonding method includes: heating the first lens and softening the first lens; pressing the softened first lens to the second lens, and bonding the first bonding surface to the second bonding surface, and hot-melting the first connecting part 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 greater than or equal to the bonding temperature, which is a temperature at which the first connecting part and the second connecting part can be thermally melted, and the temperature of the first optical part is greater than or equal to the thermoplastic temperature, which is a temperature at which the first optical part can be softened and is less than the bonding temperature. The lens bonding method as described in claim 1, wherein the step of heating the first lens comprises: A heating component is arranged on a side of the first lens away from the second lens, and a heat insulating part is arranged between the heating component and the first optical part, and the heat generated by the heating component is controlled, and the heat insulating part is used to isolate the heat transferred from the heating component to the first optical part. The lens bonding method as described in claim 1, wherein the step of pressing the first lens to the second lens comprises: Simultaneously pressing the first optical part to the second optical part and pressing the first connecting part to the second connecting part. A lens bonding device, which is improved in that it is used to perform the lens bonding method as described in any one of claims 1 to 3, and the lens bonding device includes: a positioning mold, the positioning mold is provided with a positioning groove, the positioning groove is used to accommodate the second lens; a pressing mold, the pressing mold is provided with a pressing groove, the pressing groove is used to accommodate the first lens; the opening of the pressing groove is arranged opposite to the opening of the positioning groove, and the pressing mold is also used to press against the positioning mold, so that the softened first optical part of the first lens is attached to the second optical part of the second lens, and the first connecting part of the first lens is hot-melt connected to the second connecting part of the second lens; A heating component, the heating component is used to heat the first lens and soften the first lens. A lens bonding device as described in claim 4, wherein a heat-insulating component is provided in the press mold, and the heat-insulating component is used to heat the press mold so that the difference between the temperature of the press mold and the temperature of the first optical part after heating is maintained within a preset range and the temperature of the press mold is lower than the temperature of the first optical part. A lens coupling device as described in claim 4, wherein the lens coupling device further includes a heat insulating portion, which is used to be arranged between the first optical portion and the heating assembly to reduce the amount of heat received by the first optical portion, thereby making the temperature of the first optical portion lower than the temperature of the first connecting portion. A lens combination device as described in claim 6, wherein the projection of the thermal insulation part on the first optical part is located on the inner side of the outer contour of the first optical part. A lens assembly, the improvement of which is that it is made by using the lens bonding method as described in any one of claims 1 to 3, the lens assembly comprising: A first lens, the first lens comprising a first optical part and a first connecting part, the first optical part having a first bonding surface; A second lens, the second lens comprising a second optical part and a second connecting part, the second optical part having a second bonding surface, the second bonding surface being bonded to the first bonding surface, and the first connecting part being hot-melt-connected to the second connecting part. The lens assembly as described in claim 8, wherein 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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