Method and system for manufacturing binary chalcogenide glass aspherical surface lens

Abstract

The application discloses a kind of chalcogenide glass binary surface aspherical lens manufacturing method and system, by placing chalcogenide glass preform in the mold made in advance, then into moulding press, carry out heating and obtain its current temperature, if the temperature difference between current temperature and the glass transition temperature set in advance is in the first temperature range, then chalcogenide glass preform is determined as first preform, because binary surface aspherical structure is arranged in the mold, so the mold is pressed using moulding press, to make the mold to the first preform pressing, binary surface aspherical structure in the mold can be copied on the first preform, obtain second preform, determine the current form of second preform, if the form of second preform becomes glassy, then second preform after annealing cooling treatment is taken out from the mold, obtain binary surface aspherical lens.The method greatly reduces manufacturing cost and processing cycle, production stability is higher, suitable for mass production in short time.

Description

Technical Field

[0001] This application relates to the field of lens molding technology, specifically to a method and system for manufacturing a chalcogenide glass binary aspherical lens. Background Technology

[0002] In the field of lens molding technology, glass is commonly used to manufacture various lens materials, with chalcogenide glass having the highest utilization rate. As an infrared lens material, it offers advantages such as high production efficiency, short cycle time, and low cost. Lenses made from chalcogenide glass have a low temperature coefficient of refractive index and a low dispersion coefficient, which is beneficial for achromatic and thermal optical designs.

[0003] However, traditional methods for making lenses using chalcogenide glass mostly involve single-point diamond lathe turning, which results in high equipment costs, long processing time, and low production efficiency. Summary of the Invention

[0004] In view of this, this application provides a method and system for manufacturing a binary aspherical lens of chalcogenide glass, which solves the problems of traditional methods for manufacturing lenses using chalcogenide glass, which mostly use single-point diamond lathe turning, resulting in high equipment costs, long processing time, and low production efficiency.

[0005] To achieve the above objectives, the following solution is proposed:

[0006] In a first aspect, a method for manufacturing a chalcogenide glass binary aspherical lens includes:

[0007] Chalcogenide glass preforms are placed in a pre-made mold, and the mold containing the chalcogenide glass preforms is placed into a molding press; the mold is provided with a binary aspherical structure;

[0008] The chalcogenide glass preform is heat-treated using the molding machine.

[0009] The current temperature of the chalcogenide glass preform is obtained. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform.

[0010] The molding machine is used to press the mold so that the mold presses the first preform to obtain the second preform;

[0011] If the second preform is in a preset glassy state, then the second preform is subjected to annealing and cooling treatments in sequence, and is taken out from the mold to obtain a binary aspherical lens.

[0012] Preferably, the step of using the molding machine to press the mold to press the first preform into a second preform includes:

[0013] Determine whether the first preform is in contact with both the surface of the upper mold core and the surface of the lower mold core in the mold;

[0014] If so, the molding machine is used to pressurize the mold so that the structure of the upper mold core surface is replicated on the upper surface of the first preform and the structure of the lower mold core surface is replicated on the lower surface of the first preform.

[0015] Preferably, the step of using the molding machine to press the mold to press the first preform into a second preform includes:

[0016] The mold is pressurized using the molding machine so that the mold ring controls the outer diameter and center thickness of the first preform, thereby obtaining the second preform.

[0017] Preferably, it further includes:

[0018] The surface shape error of the binary aspherical lens is measured using a pre-acquired profilometer.

[0019] If the surface shape error of the binary aspherical lens is less than a preset error threshold, then the surface shape of the binary aspherical lens is determined to be qualified.

[0020] Preferably, after placing the chalcogenide glass preform in a pre-made mold and placing the mold containing the chalcogenide glass preform into a molding press, the method further includes:

[0021] Nitrogen gas is continuously introduced into the molding machine.

[0022] Preferably, the shape of the chalcogenide glass preform is sphere, quasi-sphere, or cylinder.

[0023] Preferably, the first temperature range is 5 to 50°C.

[0024] Preferably, the mold is made of tungsten steel, ceramic, or mold steel.

[0025] Preferably, the shape of the binary aspherical lens is a concave-convex lens, a plano-concave lens, a plano-convex lens, a biconcave lens, or a biconvex lens.

[0026] Secondly, a manufacturing system for a chalcogenide glass binary aspherical lens includes a picking module, a temperature processing module, a temperature judgment module, a pressure processing module, and an annealing and cooling module.

[0027] The picking module is used to place the chalcogenide glass preform into a pre-made mold, put the mold containing the chalcogenide glass preform into a molding press, and determine whether the current state of the second preform after annealing and cooling is the preset glass state. If so, the second preform after annealing and cooling is taken out from the mold to obtain a binary aspherical lens; the mold is provided with a binary aspherical structure.

[0028] The temperature processing module is used to heat the chalcogenide glass preform.

[0029] The temperature determination module is used to obtain the current temperature of the chalcogenide glass preform. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform.

[0030] The pressure processing module is used to apply pressure to the mold using the molding press, so that the mold presses the first preform to obtain the second preform;

[0031] The annealing and cooling module is used to perform annealing and cooling treatment on the second preform.

[0032] As can be seen from the above technical solution, this application places a chalcogenide glass preform in a pre-made mold, and then places the mold containing the chalcogenide glass preform into a molding press. The mold contains a binary aspherical structure. The molding press and the mold are used to operate the chalcogenide glass preform. After heating the chalcogenide glass preform, its current temperature is obtained. If the temperature difference between the current temperature and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform, thereby achieving the purpose of softening and allowing the chalcogenide glass preform to change shape. Then, the molding press is used to press the mold to press the first preform, replicating the binary aspherical structure in the mold onto the first preform to obtain the second preform. The pressing process can shape the first preform. After shaping, annealing and cooling treatment are performed. If the second preform becomes glassy, ​​the annealed and cooled second preform is removed from the mold to obtain a binary aspherical lens. This method significantly reduces manufacturing costs and processing cycles, offers high production stability, and is suitable for large-scale production in a short period of time. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 An optional flowchart illustrating a method for fabricating a chalcogenide glass binary aspherical lens provided in an embodiment of this application;

[0035] Figure 2 A structural diagram of a mold for manufacturing a chalcogenide glass binary aspherical lens provided in an embodiment of this application;

[0036] Figure 3 A schematic diagram of the structure of an apparatus for fabricating a chalcogenide glass binary aspherical lens provided in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of a fabrication apparatus for a chalcogenide glass binary aspherical lens provided in an embodiment of this application. Detailed Implementation

[0038] The technical solutions of 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the field of lens molding technology, glass is commonly used to manufacture various lens materials, with chalcogenide glass being the most widely used. As an infrared lens material, it offers advantages such as high production efficiency, short cycle time, and low cost. Furthermore, chalcogenide glass has a low temperature coefficient of refractive index and a low dispersion coefficient, which is beneficial for achromatic and thermal optical designs. Therefore, lenses produced using chalcogenide glass, in addition to their superior refractive properties, can further eliminate various chromatic aberrations, such as chromatic aberration, and improve image quality through overlapping diffraction effects and the negative dispersion properties of diffractive optical elements.

[0040] However, traditional methods for making lenses using chalcogenide glass mostly involve single-point diamond lathe turning, which results in high equipment costs, long processing time, and low production efficiency.

[0041] This invention provides a method for fabricating a chalcogenide glass binary aspherical lens. This method can be applied to various computer terminals or smart terminals, and the executing entity can be the processor or server of the computer terminal or smart terminal. The method flowchart is shown below. Figure 1 As shown, it specifically includes:

[0042] S1: Place the chalcogenide glass preform into a pre-made mold, and place the mold containing the chalcogenide glass preform into a molding press; the mold is provided with a binary aspherical structure.

[0043] In this application, chalcogenide glass preforms in the shape of spheres, quasi-spheres, or cylinders can be selected. It is understood that the volume of the lens to be manufactured is the same as the volume of the preform. The mold is prefabricated and has a binary aspherical structure inside. The chalcogenide glass preform is placed into the mold, and then the mold containing the chalcogenide glass preform is placed into a molding machine. Through a series of operations, the molding machine can replicate the binary aspherical structure in the mold onto the preform.

[0044] The mold can be made of tungsten steel, ceramic, or mold steel.

[0045] S2: The chalcogenide glass preform is heated using the molding machine.

[0046] Different parameters such as temperature, pressure, and time can be set on the molding machine according to different requirements. After the chalcogenide glass preform is placed into the molding machine, it is heated using the machine. The purpose of heating the chalcogenide glass preform is to soften it, making it easier to apply pressure and change its shape.

[0047] S3: Obtain the current temperature of the chalcogenide glass preform. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, then the chalcogenide glass preform is determined as the first preform.

[0048] As the temperature gradually rises, the temperature of the chalcogenide glass preform can be detected in real time after a few seconds, depending on the heating speed of the molding machine. If the temperature difference between the current temperature of the chalcogenide glass preform and the pre-set glass transition temperature of the chalcogenide glass is within the preset first temperature range, then it can be said that the chalcogenide glass preform has reached the softness to be molded, and thus it is identified as the first preform.

[0049] Specifically, the glass transition temperature refers to the temperature at which chalcogenide glass preforms can be formed, at which point the chalcogenide glass is no longer in a glassy state, but becomes in a highly elastic state.

[0050] In this application, the first temperature range can be set to 5 to 50°C, and this embodiment does not limit it.

[0051] S4: The molding machine is used to press the mold so that the mold presses the first preform to obtain the second preform.

[0052] In this step, the molding machine applies a certain pressure to the mold so that the mold presses the first preform, causing the shape of the first preform to gradually change, thereby obtaining the second preform.

[0053] During this process, the pressure intensity continuously increases. Once a certain threshold is reached, the pressure intensity will no longer increase. This threshold can be set to a range of 0.1 to 1 MPa.

[0054] S5: The second preform is subjected to annealing and cooling treatment in sequence. It is determined whether the current state of the second preform after annealing and cooling treatment is the preset glass state. If so, the second preform after annealing and cooling treatment is taken out from the mold to obtain a binary aspherical lens.

[0055] Specifically, the second preform is subjected to annealing and cooling treatments in sequence to transform it into a glassy state. In this application, the morphological changes of the chalcogenide glass preform during the manufacturing process are sequential: glassy state, elastic state, and glassy state. Once the second preform has transformed into a glassy state, the manufacturing process is complete, and it is removed from the mold to obtain a binary aspherical lens.

[0056] The binary aspherical lens produced by this method is any binary aspherical lens with a diameter of 35mm (excluding) or less, and its shape can be a concave-convex lens, a plano-concave lens, a plano-convex lens, a biconcave lens, or a biconvex lens.

[0057] Traditional binary spherical lenses exhibit significant spherical aberration, while single aspherical lenses produce chromatic aberration. Existing methods for eliminating chromatic aberration by combining multiple lenses involve numerous components and complex instrument structures. However, binary aspherical lenses made from chalcogenide glass, compared to existing aspherical lenses, not only possess the refractive effect of aspherical lenses but also further eliminate various chromatic aberrations, such as chromatic hue aberration, through overlapping diffraction effects and utilizing the negative dispersion properties of diffractive optical elements. This improves image quality, enabling significant miniaturization of optical systems, substantial enhancement of imaging performance, and reduction of system costs.

[0058] As can be seen from the above technical solution, this application places a chalcogenide glass preform in a pre-made mold, and then places the mold containing the chalcogenide glass preform into a molding press. The mold contains a binary aspherical structure. The molding press and the mold are used to operate the chalcogenide glass preform. After heating the chalcogenide glass preform, its current temperature is obtained. If the temperature difference between the current temperature and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform, thereby achieving the purpose of softening and allowing the chalcogenide glass preform to change shape. Then, the molding press is used to press the mold to press the first preform, replicating the binary aspherical structure in the mold onto the first preform to obtain the second preform. The pressing process can shape the first preform. After shaping, annealing and cooling treatment are performed. If the second preform becomes glassy, ​​the annealed and cooled second preform is removed from the mold to obtain a binary aspherical lens. This method significantly reduces manufacturing costs and processing cycles, offers high production stability, and is suitable for large-scale production in a short period of time.

[0059] The method provided in this embodiment of the invention involves using the molding machine to press the mold, thereby pressing the first preform into a second preform. The specific details are as follows:

[0060] S41: Determine whether the first preform is in contact with both the upper mold core surface and the lower mold core surface in the mold.

[0061] S42: If so, the mold is pressurized using the molding machine so that the structure of the upper mold core surface is replicated on the upper surface of the first preform and the structure of the lower mold core surface is replicated on the lower surface of the first preform.

[0062] S43: The mold is pressurized using the molding machine so that the mold ring controls the outer diameter and center thickness of the first preform to obtain the second preform.

[0063] Specifically, this application provides a mold, such as Figure 2 As shown, the mold is manufactured according to a pre-set lens drawing. The mold consists of four parts: an upper mold core, a lower mold core, a mold ring, and a mold sleeve. Both the upper and lower mold core surfaces have a binary aspherical structure. The upper end of the first preform is attached to the upper mold core surface, and the lower end of the first preform is attached to the lower mold core surface. Then, a molding machine applies pressure to the mold, so the structure of the upper mold core surface can be replicated to the upper surface of the first preform, and the structure of the lower mold core surface can be replicated to the lower surface of the first preform.

[0064] In addition, the mold ring plays a role in controlling the outer diameter and center thickness of the first preform in the above process. The inner diameter of the mold ring is consistent with the outer diameter of the lens to be manufactured, and the thickness is consistent with the edge thickness of the lens to be manufactured. The first preform is bound in the mold ring, keeping it stationary, and the mold sleeve covers the outside of the upper and lower mold cores.

[0065] Understandably, after obtaining the binary aspherical lens, it is necessary to perform a conformity inspection, including: measuring the surface shape error of the binary aspherical lens using a pre-acquired profilometer; if the surface shape error of the binary aspherical lens is less than a preset error threshold, then the surface shape of the binary aspherical lens is determined to be qualified. The error threshold range can be set to 1–1.5 micrometers. Furthermore, determining whether the final manufactured binary aspherical lens is qualified requires not only considering whether the surface shape is qualified, but also whether its diameter and thickness are both within 1–2 micrometers, and whether its surface appearance meets the corresponding requirements. If all indicators are qualified, then the overall binary aspherical lens is determined to be qualified.

[0066] Optionally, to prevent the chalcogenide glass preforms from oxidizing and deteriorating during the high-temperature fabrication process, the chalcogenide glass preforms can be placed in a pre-made mold, and then nitrogen gas can be continuously introduced into the molding machine after the mold containing the chalcogenide glass preforms is placed into the molding machine. Furthermore, the entire fabrication process is controlled within the range of 50–500 seconds. Different heating and pressurization times can be set according to different fabrication requirements or different qualities of chalcogenide glass; this embodiment does not impose any limitations on this.

[0067] In one example, VIG01 chalcogenide glass was selected. A spherical chalcogenide glass preform with a diameter of 9mm was designed and manufactured according to the lens drawings. A mold with a corresponding lens structure was then designed and manufactured; the mold material was tungsten carbide. Using this preform and mold, a binary aspherical lens was fabricated using the method provided in this application. After fabrication, the binary aspherical lens was inspected, and its surface shape error was controlled below 1.5 micrometers, and MTF imaging was obtained. The final binary aspherical lens is a chalcogenide glass binary aspherical concave-convex lens with a diameter of 14mm and a center thickness of 3mm. Its convex surface is aspherical, and its concave surface is a combination of aspherical and binary surfaces.

[0068] In this application, due to the selection of mold materials and the stability of the molding process, the binary aspherical lenses with consistent performance can be mass-produced in a short time by repeating the manufacturing process.

[0069] and Figure 1 Corresponding to the method described above, this embodiment of the invention also provides a system for fabricating a chalcogenide glass binary aspherical lens, used for... Figure 1The specific implementation of the method can include: a picking module, a temperature processing module, a temperature judgment module, a pressure processing module, and an annealing cooling module;

[0070] The picking module is used to place the chalcogenide glass preform into a pre-made mold, put the mold containing the chalcogenide glass preform into a molding press, and determine whether the current state of the second preform after annealing and cooling is the preset glass state. If so, the second preform after annealing and cooling is taken out from the mold to obtain a binary aspherical lens; the mold is provided with a binary aspherical structure.

[0071] The temperature processing module is used to heat the chalcogenide glass preform.

[0072] The temperature determination module is used to obtain the current temperature of the chalcogenide glass preform. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform.

[0073] The pressure processing module is used to apply pressure to the mold using the molding press, so that the mold presses the first preform to obtain the second preform;

[0074] The annealing and cooling module is used to perform annealing and cooling treatments on the second preform sequentially.

[0075] and Figure 1 Corresponding to the method described above, this embodiment of the invention also provides an apparatus for fabricating a chalcogenide glass binary aspherical lens, used for... Figure 1 The specific implementation of the method, the apparatus for fabricating a chalcogenide glass binary aspherical lens provided in this embodiment of the invention, can be used in a computer terminal or various mobile devices, combined with... Figure 3 The fabrication apparatus for binary aspherical lenses made of chalcogenide glass is introduced, such as... Figure 3 As shown, the device may include:

[0076] The placement module 10 is used to place the chalcogenide glass preform into a pre-made mold and to put the mold containing the chalcogenide glass preform into a molding press; the mold is provided with a binary aspherical structure.

[0077] Heating module 20 is used to heat the chalcogenide glass preform using the molding machine;

[0078] The first preform determination module 30 is used to obtain the current temperature of the chalcogenide glass preform. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, then the chalcogenide glass preform is determined as the first preform.

[0079] The pressurizing module 40 is used to pressurize the mold using the molding press, so that the mold presses the first preform to obtain the second preform;

[0080] The binary aspherical lens obtaining module 50 is used to perform annealing and cooling treatments on the second preform in sequence, and to determine whether the current state of the second preform after annealing and cooling treatment is a preset glassy state. If so, the second preform after annealing and cooling treatment is taken out from the mold to obtain the binary aspherical lens.

[0081] As can be seen from the above technical solution, this application places a chalcogenide glass preform in a pre-made mold, and then places the mold containing the chalcogenide glass preform into a molding press. The mold contains a binary aspherical structure. The molding press and the mold are used to operate the chalcogenide glass preform. After heating the chalcogenide glass preform, its current temperature is obtained. If the temperature difference between the current temperature and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform, thereby achieving the purpose of softening and allowing the chalcogenide glass preform to change shape. Then, the molding press is used to press the mold to press the first preform, replicating the binary aspherical structure in the mold onto the first preform to obtain the second preform. The pressing process can shape the first preform. After shaping, annealing and cooling treatment are performed. If the second preform becomes glassy, ​​the annealed and cooled second preform is removed from the mold to obtain a binary aspherical lens. This method significantly reduces manufacturing costs and processing cycles, offers high production stability, and is suitable for large-scale production in a short period of time.

[0082] In one example, the pressurization module 40 may include:

[0083] The judgment module is used to determine whether the first preform is in contact with both the surface of the upper mold core and the surface of the lower mold core in the mold;

[0084] The replication module is used to apply pressure to the mold using the molding machine if the condition is met, so that the structure of the upper mold core surface is replicated on the upper surface of the first preform and the structure of the lower mold core surface is replicated on the lower surface of the first preform.

[0085] In one example, the pressurization module 40 may further include:

[0086] The control module is used to pressurize the mold using the molding press, so that the mold ring controls the outer diameter and center thickness of the first preform to obtain the second preform.

[0087] In one example, the device may further include:

[0088] The surface error acquisition module is used to measure the surface error of the binary aspherical lens using a pre-acquired profilometer.

[0089] The qualification determination module is used to determine that the surface shape of the binary aspherical lens is qualified if the surface shape error of the binary aspherical lens is less than a preset error threshold.

[0090] In one example, the device may also include a venting module for continuously introducing nitrogen gas into the molding press.

[0091] Furthermore, embodiments of this application provide an apparatus for fabricating a binary aspherical lens made of chalcogenide glass. Optionally, Figure 4 The diagram shows the hardware structure of the fabrication equipment for a binary aspherical lens made of chalcogenide glass. (Refer to...) Figure 4 The hardware structure of the fabrication equipment for binary aspherical lenses of chalcogenide glass may include: at least one processor 01, at least one communication interface 02, at least one memory 03 and at least one communication bus 04.

[0092] In this embodiment, the number of processor 01, communication interface 02, memory 03 and communication bus 04 is at least one, and processor 01, communication interface 02 and memory 03 communicate with each other through communication bus 04.

[0093] Processor 01 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

[0094] Memory 03 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device.

[0095] The memory stores a program, which the processor can call to execute the following method for manufacturing a chalcogenide glass binary aspherical lens, including:

[0096] Chalcogenide glass preforms are placed in a pre-made mold, and the mold containing the chalcogenide glass preforms is placed into a molding press; the mold is provided with a binary aspherical structure;

[0097] The chalcogenide glass preform is heat-treated using the molding machine.

[0098] The current temperature of the chalcogenide glass preform is obtained. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform.

[0099] The molding machine is used to press the mold so that the mold presses the first preform to obtain the second preform;

[0100] The second preform is subjected to annealing and cooling treatments in sequence. It is determined whether the current state of the second preform after annealing and cooling treatments is the preset glassy state. If so, the second preform after annealing and cooling treatments is taken out of the mold to obtain a binary aspherical lens.

[0101] Optionally, the refinement and extension functions of the program can be found in the description of the method for fabricating a chalcogenide glass binary aspherical lens in the method embodiments.

[0102] This application embodiment also provides a storage medium that can store a program suitable for execution by a processor. When the program runs, it controls the device containing the storage medium to perform the following method for manufacturing a chalcogenide glass binary aspherical lens, including:

[0103] Chalcogenide glass preforms are placed in a pre-made mold, and the mold containing the chalcogenide glass preforms is placed into a molding press; the mold is provided with a binary aspherical structure;

[0104] The chalcogenide glass preform is heat-treated using the molding machine.

[0105] The current temperature of the chalcogenide glass preform is obtained. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform.

[0106] The molding machine is used to press the mold so that the mold presses the first preform to obtain the second preform;

[0107] The second preform is subjected to annealing and cooling treatments in sequence. It is determined whether the current state of the second preform after annealing and cooling treatments is the preset glassy state. If so, the second preform after annealing and cooling treatments is taken out of the mold to obtain a binary aspherical lens.

[0108] Specifically, the storage medium can be a computer-readable storage medium, which can be an electronic storage device such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM.

[0109] Optionally, the refinement and extension functions of the program can be found in the description of the method for fabricating a chalcogenide glass binary aspherical lens in the method embodiments.

[0110] Furthermore, the functional modules in the various embodiments of this disclosure can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part. If the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a live streaming device, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this disclosure.

[0111] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0112] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0113] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for manufacturing a binary aspherical lens made of chalcogenide glass, characterized in that, include: The chalcogenide glass preform is placed in a pre-made mold, and the mold containing the chalcogenide glass preform is placed into a molding press. The mold is provided with a binary aspherical structure. The chalcogenide glass preform is heat-treated using the molding machine. The current temperature of the chalcogenide glass preform is obtained. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform. The glass transition temperature refers to the temperature at which the chalcogenide glass preform is formed. The first temperature range is 5~50℃. The molding machine is used to press the mold to press the first preform into a second preform. This includes: determining whether the first preform is in contact with both the upper and lower mold core surfaces; if so, the molding machine is used to press the mold to replicate the structure of the upper mold core surface onto the upper surface of the first preform and the structure of the lower mold core surface onto the lower surface of the first preform; the inner diameter and thickness of the mold ring are consistent with the outer diameter and thickness of the fabricated binary aspherical lens, respectively; the first preform is bound within the mold ring to keep it stationary, and the mold ring surrounds the upper and lower mold cores; the pressure increases continuously during the pressing process, and stops increasing after reaching a threshold value, which ranges from 0.1 to 1 MPa. The second preform is subjected to annealing and cooling treatments in sequence. It is determined whether the current state of the second preform after annealing and cooling treatments is the preset glassy state. If so, the second preform after annealing and cooling treatments is taken out of the mold to obtain a binary aspherical lens. The morphological changes of the second preform during the manufacturing process are as follows: glassy state, high elastic state, and glassy state. The manufacturing process is completed after the high elastic state changes to the glassy state. The resulting binary aspherical lens is a concave-convex lens, a plano-concave lens, a plano-convex lens, a biconcave lens, or a biconvex lens. The entire manufacturing process is controlled within 50 seconds.

2. The method according to claim 1, characterized in that, The process of using the molding machine to press the mold to press the first preform into a second preform includes: The mold is pressurized using the molding machine so that the mold ring controls the outer diameter and center thickness of the first preform, thereby obtaining the second preform.

3. The method according to claim 1, characterized in that, Also includes: The surface shape error of the binary aspherical lens is measured using a pre-acquired profilometer. If the surface shape error of the binary aspherical lens is less than a preset error threshold, then the surface shape of the binary aspherical lens is determined to be qualified.

4. The method according to claim 1, characterized in that, After placing the chalcogenide glass preform into a pre-made mold and placing the mold containing the chalcogenide glass preform into a molding machine, the process further includes: Nitrogen gas is continuously introduced into the molding machine.

5. The method according to claim 1, characterized in that, The shape of the chalcogenide glass preform is sphere, quasi-sphere, or cylinder.

6. The method according to claim 1, characterized in that, The mold is made of tungsten steel, ceramic, or mold steel.

7. A system for fabricating a binary aspherical lens made of chalcogenide glass, characterized in that, It includes a pick-up module, a temperature processing module, a temperature judgment module, a pressure processing module, and an annealing cooling module; The picking module is used to place the chalcogenide glass preform into a pre-made mold, put the mold containing the chalcogenide glass preform into a molding press, and determine whether the current state of the second preform after annealing and cooling is the preset glass state. If so, the second preform after annealing and cooling is taken out from the mold to obtain a binary aspherical lens; the mold is provided with a binary aspherical structure. The temperature processing module is used to heat the chalcogenide glass preform. The temperature determination module is used to obtain the current temperature of the chalcogenide glass preform. If the temperature difference between the current temperature of the chalcogenide glass preform and the preset glass transition temperature is within a preset first temperature range, the chalcogenide glass preform is determined as the first preform. The glass transition temperature refers to the temperature at which the chalcogenide glass preform is formed. The first temperature range is 5~50℃. The pressure processing module is used to apply pressure to the mold using the molding press, so that the mold presses the first preform to obtain the second preform; including: determining whether the first preform is in contact with the surfaces of the upper and lower mold cores in the mold; if so, applying pressure to the mold using the molding press, so that the structure of the upper mold core surface is replicated on the upper surface of the first preform and the structure of the lower mold core surface is replicated on the lower surface of the first preform; the inner diameter and thickness of the mold ring are consistent with the outer diameter and thickness of the fabricated binary aspherical lens, the first preform is bound in the mold ring to keep the first preform stationary, and the mold ring wraps around the upper and lower mold cores; the pressure intensity continuously increases during the pressure processing, and stops increasing when a threshold is reached, the threshold range being 0.1 to 1 MPa; The annealing and cooling module is used to perform annealing and cooling treatments on the second preform sequentially. The morphological changes of the second preform during the manufacturing process are as follows: glassy state, high elastic state, and glassy state. The manufacturing process is completed after the high elastic state changes to the glassy state. The resulting binary aspherical lens is a concave-convex lens, a plano-concave lens, a plano-convex lens, a biconcave lens, or a biconvex lens. The entire manufacturing process is controlled to take 50 seconds.

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