A method for preparing a disposable aspheric rod mirror

Abstract

The present invention discloses a method for preparing a disposable aspheric rod mirror. The present invention relates to the field of rod mirror technology, including preparing an aspheric rod mirror and surface treating the aspheric rod mirror. The advantages of the present invention are: by designing a hollow area in the disposable aspheric rod mirror, a significant material reduction advantage is exhibited during the laser selective melting process. The laser selective melting technology is based on the principle of selectively melting glass powder layer by layer with a high-energy laser beam, and itself has a high molding efficiency. When manufacturing an aspheric rod mirror with a hollow structure, the volume of the solid part is greatly reduced, and the amount of material to be processed by the laser beam is significantly reduced, which not only reduces energy consumption, but also further shortens the molding time. From a microscopic level, the scanning path of the laser beam on the glass powder is simplified, unnecessary reciprocating motion is reduced, thereby accelerating the molding process.

Description

Technical Field

[0001] The invention relates to the technical field of rod mirrors, in particular to a method for preparing a disposable aspherical rod mirror. Background Art

[0002] Endoscopes are important tools for humans to peer into their internal organs. Hippocrates, the famous ancient Greek physician known as the "Father of Medicine," once described a rectal speculum that was very similar to the instruments we use today. These speculums were used to peer into the vagina and cervix, examine the rectum, and inspect the ears and nose. These examinations were performed using natural light. The true development of endoscopes began in modern times. Generally, their development stages can be divided into rigid endoscopes, semi-flexible endoscopes, fiber endoscopes, and ultrasound and electronic endoscopes. The development of rigid endoscopes has gone through two stages: open rigid endoscopes and rigid endoscopes with optical systems.

[0003] In order to achieve good optical properties, such as high refractive index, low dispersion, high transparency, etc., aspheric rod mirrors often need to use special optical materials, some high-quality optical glass or optical crystal materials, which are themselves expensive. The mining, refining and processing of these materials are complicated, resulting in high raw material prices, which increases the production cost of aspheric rod mirrors. In the manufacturing process of aspheric rod mirrors, especially under traditional grinding and polishing processes, the material removal rate is high. Due to the particularity of the aspheric shape, a large amount of grinding is required to achieve a precise curved surface shape, which will cause a large amount of material waste. For this reason, we propose a preparation method for disposable aspheric rod mirrors. Summary of the Invention

[0004] The object of the present invention is to provide a method for preparing a disposable aspheric rod mirror.

[0005] To solve the problems raised in the above background technology, the present invention provides the following technical solutions: a method for preparing a disposable aspheric rod mirror, comprising preparing the aspheric rod mirror and treating the surface of the aspheric rod mirror. The specific steps of preparing the disposable aspheric rod mirror are as follows:

[0006] Step 1: Prepare micron-sized glass powder from borosilicate glass blocks, add titanium oxide powder, and change the network structure connection mode of the aspheric rod mirror;

[0007] Step 2: Use CAD software to design a three-dimensional model of the aspheric rod mirror, and design a streamlined hollow area inside the aspheric rod mirror to guide light through smoothly and reduce sudden changes in light at the boundary;

[0008] Step 3: Use ray tracing software to simulate the propagation path of light in the aspheric rod mirror, and adjust the position and shape of the hollow area according to the simulated propagation path;

[0009] Step 4: Slice and layer the aspheric rod mirror model, and use laser selective melting technology to stack the slices to produce the aspheric rod mirror. A layering strategy is used to dynamically select the appropriate layer thickness to adapt to the curvature of the aspheric rod mirror.

[0010] Step 5: preparing a nanocomposite coating solution using a disulfide bond cross-linked polymer solution, a silver nanoparticle dispersion, and a zwitterionic polymer solution, and spraying the solution on the surface of the aspheric rod mirror to impart self-repairing and antibacterial functions to the aspheric rod mirror;

[0011] Step 6: Use ethylene oxide to sterilize the disposable aspheric rod mirror, remove the ethylene oxide and impurities on the surface of the disposable aspheric rod mirror, and then package the treated disposable aspheric rod mirror.

[0012] As a further solution of the present invention: in the step 1, borosilicate glass blocks are selected as the basic raw material, and titanium oxide powder with a purity of 99% is added, and the amount of titanium oxide added is 1%-5% of the borosilicate glass blocks. The borosilicate glass blocks and titanium oxide powder are placed in a mixing tank and mixed at a rate of 200 r / min-400 r / min for 30 min-60 min for preliminary mixing. The borosilicate glass blocks and titanium oxide powder are ground using a ball mill, using 5 mm-10 mm zirconium oxide balls as grinding media, and grinding at a rate of 300 r / min-600 r / min for 12 h-36 h. After grinding, the glass powder is screened using a standard sieve to select glass powder with a particle size of 10 μm-50 μm.

[0013] As a further solution of the present invention: in the step 2, a three-dimensional model of the aspheric rod mirror is designed using CAD software, the length of the aspheric rod mirror is set to 100mm-300mm, the diameter of the aspheric rod mirror is set to 2mm-5mm, and a streamlined hollow area is designed in the aspheric rod mirror model, the starting position of the hollow area is 10mm-30mm away from the two ends of the aspheric rod mirror, the curvature radius of the hollow area is set to 2mm-3mm, the cross-section of the hollow area is set to an ellipse, the ratio of the major axis to the minor axis of the cross-section of the hollow area is set to 1.5-2:1, and the number of hollow areas is set to 10-20.

[0014] As a further solution of the present invention: in the step three, the designed aspheric rod mirror model with a streamlined hollow area is imported into the optical simulation software to perform ray tracing and optical performance analysis. By simulating the propagation of light in the rod mirror, the influence of the hollow area on light transmission, focusing, and aberration is evaluated. According to the analysis results, the shape, position, and size parameters of the hollow area are adjusted and optimized, and then the designed model is sliced, and the thickness of the slice is set to 0.1mm-0.5mm.

[0015] As a further solution of the present invention: in the step 4, a fiber laser with a wavelength of 1060nm-1080nm is used to melt the glass powder, the size of the spot is controlled at 50um-100um, the laser power is set to 100W-300W, the scanning speed is set to 50mm / s-100mm / s, and a layered method is adopted to manufacture an aspheric rod mirror with a hollow area. A powder spreading device is used to spread the glass powder on a powder bed, and the thickness of the powder is set to 20um-50um. The fiber laser constructs the aspheric rod mirror with a hollow area layer by layer according to the scanning path. After the manufacturing is completed, the aspheric rod mirror is placed in an annealing furnace for annealing, and the temperature is raised to 400℃-600℃ at a rate of 1℃ / min-5℃ / min for annealing for 1h-3h, and then reduced to 20℃-30℃ at a rate of 0.2℃ / min-2℃ / min to obtain an aspheric rod mirror with a hollow area.

[0016] As a further embodiment of the present invention: in the step 5, methyl methacrylate and methyl 2-mercaptoglycolate are mixed in an anhydrous toluene organic solvent at a ratio of 3-5:1, the reaction system is heated to 60° C.-80° C. under nitrogen protection and reacted for 6 h-12 h to obtain a thiol-containing polymer, the thiol-containing polymer is dissolved in dimethyl sulfoxide, hydrogen peroxide is added as a hydrogen oxidizing agent, and the reaction is stirred at room temperature for 2 h-4 h to form a disulfide cross-linked polymer solution.

[0017] As a further embodiment of the present invention, in step 5, silver nanoparticles are dispersed in an ethanol organic solvent to obtain a silver nanoparticle dispersion having a concentration of 1 mg / mL-10 mg / mL; sulfobetaine methacrylate polyzwitterionic polymer monomer is dissolved in the ethanol organic solvent; potassium persulfate initiator is added, and the mixture is reacted at a temperature of 60° C.-70° C. for 4-8 hours to obtain a zwitterionic polymer solution; the disulfide cross-linked polymer solution, the silver nanoparticle dispersion, and the zwitterionic polymer solution are mixed in an ethanol solvent in a volume ratio of 5:2:3; and the mixture is treated with an ultrasonic oscillator at an ultrasonic power of 100 W-500 W for 30 min-60 min to form a nanocomposite coating solution.

[0018] As a further solution of the present invention: in the step five, a spray gun is used to spray the nano-composite coating solution on the side surface of the aspheric rod mirror, and a spiral spraying method is adopted. The angle between the spray gun and the side surface of the aspheric rod mirror is set between 80°-100°, the distance between the spray gun and the rod mirror is set to 15cm-30cm, the moving speed is set to 10cm / s-20cm / s, and the spraying is repeated 5 times. The coating formed by each spraying is 1um-2um, and the interval time for each spraying is 5min-15min. After the spraying is completed, the aspheric rod mirror coated with the nano-composite coating is placed at a temperature of 40℃-80℃ and dried for 5h-10h to obtain a disposable aspheric rod mirror with a nano-composite coating.

[0019] As a further solution of the present invention: in the step six, the disposable aspheric rod mirror is placed in a sealed ethylene oxide sterilizer, and the sterilization time is set to 1h-4h in an environment with a temperature of 37℃-63℃, a relative humidity of 40%-80%, and an ethylene oxide concentration of 450mg / L-1200mg / L. After sterilization, the disposable aspheric rod mirror is placed in a ventilated environment for analysis for 12h-24h. The disposable aspheric rod mirror that passes the inspection is inner-packaged with polyurethane foam, and a groove for storing the disposable aspheric rod mirror is cut into the polyurethane foam so that the disposable aspheric rod mirror is stuck in the groove, and a layer of buffer sponge with a thickness of 5mm-10mm is wrapped around the polyurethane foam. After the disposable aspheric rod mirror is placed, the inner packaging is sealed with a sealing bag made of barrier plastic film. When a heat sealing machine is used for sealing, the heat sealing temperature is between 120℃-200℃, and the time is 2-5 seconds, so that the sealed bag after packaging has no air leakage or leaks.

[0020] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0021] The present invention demonstrates a significant advantage in material reduction during the laser selective melting process by designing a hollow area in the disposable aspheric rod mirror. The laser selective melting technology is based on the principle of selectively melting glass powder layer by layer with a high-energy laser beam, and it itself has a high molding efficiency. When manufacturing an aspheric rod mirror with a hollow structure, the volume of the solid part is greatly reduced, and the amount of material that the laser beam needs to process is significantly reduced, which not only reduces energy consumption but also further shortens the molding time. From a microscopic perspective, the scanning path of the laser beam on the glass powder is simplified, reducing unnecessary reciprocating motion, thereby speeding up the molding process. For the large-scale production of disposable aspheric rod mirrors, the corresponding proportion of powder procurement can be directly reduced. At the same time, the shortened molding time means that the equipment usage time is reduced, reducing production costs such as equipment depreciation and energy consumption, and comprehensively improving production efficiency.

[0022] The present invention can change the propagation path of light inside the disposable aspheric rod lens by designing a hollow area in the rod lens. By rationally designing the shape and position of the hollow, the number of reflections and refractions of light inside the rod lens can be effectively reduced, thereby reducing light loss. For aspheric rod lenses, the hollow area can be used as an auxiliary means to correct aberrations. By adjusting the distribution and shape of the hollow, the aberrations generated during the propagation of light can be compensated to a certain extent.

[0023] The zwitterionic polymer solution of the present invention generally has good optical transparency. After forming a nano-composite coating, it can effectively reduce the reflectivity of the surface of the aspheric rod mirror. The disulfide bond cross-linked polymer can provide a certain structural stability for the coating, and can maintain the optical properties of the coating stable under different environmental conditions such as temperature and humidity. The silver nanoparticles have excellent antibacterial properties. When dispersed in the composite coating solution and sprayed on the surface of the aspheric rod mirror, they can effectively inhibit the growth and reproduction of microorganisms such as bacteria and fungi. Due to the presence of the disulfide bond cross-linked polymer, the silver nanoparticles can be more stably dispersed in the coating, avoiding particle agglomeration and excessive release. This structure enables the antibacterial components to exert their effects for a long time, thereby extending the antibacterial effectiveness period of the aspheric rod mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the preparation process of a disposable aspheric rod mirror in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0026] The present invention provides a method for preparing a disposable aspheric rod mirror, comprising preparing the aspheric rod mirror and treating the surface of the aspheric rod mirror. The specific steps for preparing the disposable aspheric rod mirror are as follows:

[0027] Step 1: Prepare micron-sized glass powder from borosilicate glass blocks, add titanium oxide powder, and change the network structure connection mode of the aspheric rod mirror;

[0028] Step 2: Use CAD software to design a three-dimensional model of the aspheric rod mirror, and design a streamlined hollow area inside the aspheric rod mirror to guide light through smoothly and reduce sudden changes in light at the boundary;

[0029] Step 3: Use ray tracing software to simulate the propagation path of light in the aspheric rod mirror, and adjust the position and shape of the hollow area according to the simulated propagation path;

[0030] Step 4: Slice and layer the aspheric rod mirror model, and use laser selective melting technology to stack the slices to produce the aspheric rod mirror. A layering strategy is used to dynamically select the appropriate layer thickness to adapt to the curvature of the aspheric rod mirror.

[0031] Step 5: preparing a nanocomposite coating solution using a disulfide bond cross-linked polymer solution, a silver nanoparticle dispersion, and a zwitterionic polymer solution, and spraying the solution on the surface of the aspheric rod mirror to impart self-repairing and antibacterial functions to the aspheric rod mirror;

[0032] Step 6: Use ethylene oxide to sterilize the disposable aspheric rod mirror, remove the ethylene oxide and impurities on the surface of the disposable aspheric rod mirror, and then package the treated disposable aspheric rod mirror.

[0033] In one embodiment of the present invention: in step 1, borosilicate glass blocks are selected as the basic raw material, and titanium oxide powder with a purity of 99% is added, and the amount of titanium oxide added is 1%-5% of the borosilicate glass blocks. The borosilicate glass blocks and titanium oxide powder are placed in a mixing tank and mixed at a rate of 200 r / min-400 r / min for 30 min-60 min for preliminary mixing. The borosilicate glass blocks and titanium oxide powder are ground using a ball mill, and 5 mm-10 mm zirconium oxide balls are used as grinding media. The grinding is carried out at a rate of 300 r / min-600 r / min for 12 h-36 h. After the grinding is completed, the glass powder is screened using a standard sieve to select glass powder with a particle size of 10 μm-50 μm.

[0034] In one embodiment of the present invention: in step 2, a three-dimensional model of an aspheric rod mirror is designed using CAD software, the length of the aspheric rod mirror is set to 100mm-300mm, the diameter of the aspheric rod mirror is set to 2mm-5mm, and a streamlined hollow area is designed in the aspheric rod mirror model, the starting position of the hollow area is 10mm-30mm away from both ends of the aspheric rod mirror, the curvature radius of the hollow area is set to 2mm-3mm, the cross-section of the hollow area is set to an ellipse, the ratio of the major axis to the minor axis of the cross-section of the hollow area is set to 1.5-2:1, and the number of hollow areas is set to 10-20.

[0035] In one embodiment of the present invention: In step three, the designed aspheric rod mirror model with a streamlined hollow area is imported into optical simulation software for ray tracing and optical performance analysis. By simulating the propagation of light in the rod mirror, the influence of the hollow area on light transmission, focusing, and aberration is evaluated. According to the analysis results, the shape, position, and size parameters of the hollow area are adjusted and optimized, and then the designed model is sliced, and the thickness of the slice is set to 0.1mm-0.5mm.

[0036] In one embodiment of the present invention: in step four, a fiber laser with a wavelength of 1060nm-1080nm is used to melt glass powder, the size of the spot is controlled to be 50um-100um, the laser power is set to 100W-300W, the scanning speed is set to 50mm / s-100mm / s, and a layered method is used to manufacture an aspheric rod mirror with a hollow area. A powder spreading device is used to spread the glass powder on a powder bed, and the thickness of the powder is set to 20um-50um. The fiber laser constructs the aspheric rod mirror with a hollow area layer by layer according to the scanning path. After the manufacturing is completed, the aspheric rod mirror is placed in an annealing furnace for annealing, and the temperature is raised to 400℃-600℃ at a rate of 1℃ / min-5℃ / min for annealing for 1h-3h, and then reduced to 20℃-30℃ at a rate of 0.2℃ / min-2℃ / min to obtain an aspheric rod mirror with a hollow area.

[0037] In one embodiment of the present invention: in step five, methyl methacrylate and methyl 2-mercaptoglycolate are mixed in anhydrous toluene organic solvent at a ratio of 3-5:1, the reaction system is heated to 60° C.-80° C. under nitrogen protection and reacted for 6 h-12 h to obtain a thiol-containing polymer, the thiol-containing polymer is dissolved in dimethyl sulfoxide, hydrogen peroxide is added as an oxidation agent, and the reaction is stirred at room temperature for 2 h-4 h to form a disulfide cross-linked polymer solution.

[0038] In one embodiment of the present invention: in step 5, silver nanoparticles are dispersed in an ethanol organic solvent to obtain a silver nanoparticle dispersion with a concentration of 1 mg / mL-10 mg / mL, sulfobetaine methacrylate polyzwitterionic polymer monomer is dissolved in the ethanol organic solvent, potassium persulfate initiator is added, and the mixture is reacted at a temperature of 60° C.-70° C. for 4 h-8 h to obtain a zwitterionic polymer solution, the disulfide cross-linked polymer solution, the silver nanoparticle dispersion, and the zwitterionic polymer solution are mixed in an ethanol solvent in a volume ratio of 5:2:3, and an ultrasonic oscillator is used to treat the mixture at an ultrasonic power of 100 W-500 W for 30 min-60 min to form a nanocomposite coating solution.

[0039] In one embodiment of the present invention: in step five, a spray gun is used to spray the nano-composite coating solution on the side surface of the aspheric rod mirror, and a spiral spraying method is adopted. The angle between the spray gun and the side surface of the aspheric rod mirror is set between 80°-100°, the distance between the spray gun and the rod mirror is set to 15cm-30cm, the moving speed is set to 10cm / s-20cm / s, and the spraying is repeated 5 times. The coating formed by each spraying is 1um-2um, and the interval time for each spraying is 5min-15min. After the spraying is completed, the aspheric rod mirror coated with the nano-composite coating is placed at a temperature of 40℃-80℃ and dried for 5h-10h to obtain a disposable aspheric rod mirror with a nano-composite coating.

[0040] In one embodiment of the present invention: in step six, the disposable aspheric rod mirror is placed in a sealed ethylene oxide sterilizer, and the sterilization time is set to 1h-4h in an environment with a temperature of 37℃-63℃, a relative humidity of 40%-80%, and an ethylene oxide concentration of 450mg / L-1200mg / L. After sterilization, the disposable aspheric rod mirror is placed in a ventilated environment for analysis for 12h-24h. The disposable aspheric rod mirror that has passed the inspection is inner-packaged with polyurethane foam, and a groove for storing the disposable aspheric rod mirror is cut into the polyurethane foam so that the disposable aspheric rod mirror is stuck in the groove, and a layer of buffer sponge with a thickness of 5mm-10mm is wrapped around the polyurethane foam. After the disposable aspheric rod mirror is placed, the inner packaging is sealed with a sealing bag made of barrier plastic film. When a heat sealing machine is used for sealing, the heat sealing temperature is between 120℃-200℃, and the time is 2-5 seconds, so that the sealed bag after packaging has no air leakage or leaks.

[0041] Example 1: A fiber laser with a wavelength of 1080 nm was used to melt glass powder. The spot size was controlled at 50 μm and the laser power was set to 200 W to ensure that the glass powder was fully melted and sintered while avoiding excessive melting that would cause channel deformation or excessive fusion with surrounding materials. The scanning speed was set to 50 mm / s, which helped to ensure the accuracy and quality of the channel wall and prevent defects such as holes and discontinuities. A layered method was used to manufacture an aspheric rod mirror with a hollow area. A powder spreading device was used to spread the glass powder on a powder bed. The powder spreading thickness was set to 20 μm. The thinner powder layer thickness facilitated more precise control of the shape and size when manufacturing the channel. The fiber laser constructed the aspheric rod mirror with the hollow area layer by layer according to the scanning path. After manufacturing, the aspheric rod mirror was placed in an annealing furnace for annealing. The temperature was raised to 600° C. at a rate of 5° C. / min for 2 h to eliminate internal stress, and then cooled to 25° C. at a rate of 2° C. / min to ensure the quality and stable performance of the rod mirror, thereby obtaining an aspheric rod mirror with a hollow area.

[0042] Example 2: Use CAD software to design a three-dimensional model of an aspheric rod mirror, set the length of the aspheric rod mirror to 200 mm, set the diameter of the aspheric rod mirror to 4 mm, and design a streamlined hollow area in the aspheric rod mirror model. The starting position of the hollow area is 20 mm away from both ends of the aspheric rod mirror, the curvature radius of the hollow area is set to 3 mm, the cross-section of the hollow area is set to an ellipse, the ratio of the major axis to the minor axis of the hollow area cross-section is set to 1.5:1, and the number of hollow areas is set to 15. The hollow area can reduce the volume of the solid part of the aspheric rod mirror, and the amount of material that the laser beam needs to process is significantly reduced, which not only reduces energy consumption, but also further shortens the molding time. By reasonably designing the hollow shape and position, the number of reflections and refractions of light inside the rod mirror can be effectively reduced, thereby reducing light loss.

[0043] Example 3: A disulfide cross-linked polymer solution, a silver nanoparticle dispersion and a zwitterionic polymer solution are mixed in an ethanol solvent in a volume ratio of 5:2:3, and an ultrasonic oscillator is used to treat the mixture at an ultrasonic power of 100 W for 60 minutes to form a nanocomposite coating solution. The nanocomposite coating solution is sprayed on the side surface of the aspheric rod mirror using a spray gun. The distance between the spray gun and the rod mirror is set to 15 cm, the moving speed is set to 10 cm / s, and the spraying is repeated 5 times. The coating formed by each spraying is 1 μm, and the interval time for each spraying is 15 minutes. After the spraying is completed, the aspheric rod mirror coated with a 5 μm thick nanocomposite coating is placed at a temperature of 60°C and dried for 80 hours to obtain a disposable aspheric rod mirror with a nanocomposite coating.

[0044] As attached Figure 1 As shown, a three-dimensional model of an aspheric rod mirror with a hollow structure is designed using CAD software, and the aspheric rod mirror with a hollow structure is manufactured using laser selective melting technology.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

[0046] Throughout the specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0047] The above contents are merely examples and explanations of the present invention. Any modifications, additions or replacements in similar ways made by those skilled in the art to the specific embodiments described shall fall within the scope of protection of the present invention as long as they do not deviate from the invention or exceed the scope defined by the claims.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for preparing a disposable aspheric rod mirror, comprising preparing the aspheric rod mirror and treating the surface of the aspheric rod mirror, wherein: The specific preparation steps of the disposable aspheric rod mirror are as follows: Step 1: Prepare micron-sized glass powder from borosilicate glass blocks, add titanium oxide powder, and change the network structure connection mode of the aspheric rod mirror; Step 2: Use CAD software to design a 3D model of the aspheric rod mirror, and design a streamlined hollow area inside the aspheric rod mirror to guide light through smoothly and reduce sudden changes in light at the boundary; Step 3: Use ray tracing software to simulate the propagation path of light in the aspheric rod mirror, and adjust the position and shape of the hollow area according to the simulated propagation path. In the step 3, the designed aspheric rod mirror model with a streamlined hollow area is imported into the optical simulation software to perform ray tracing and optical performance analysis. By simulating the propagation of light in the rod mirror, the influence of the hollow area on light transmission, focusing, and aberration is evaluated. According to the analysis results, the shape, position, and size parameters of the hollow area are adjusted and optimized, and then the designed model is sliced, and the thickness of the slice is set to 0.1mm-0.5mm; Step 4: Slice and layer the aspheric rod mirror model, and use laser selective melting technology to stack the slices to produce the aspheric rod mirror. A layering strategy is used to dynamically select the appropriate layer thickness to adapt to the curvature of the aspheric rod mirror. In the step 4, a fiber laser with a wavelength of 1060nm-1080nm is used to melt the glass powder. The size of the spot is controlled at 50um-100um, the laser power is set to 100W-300W, and the scanning speed is set to 50mm / s-100mm / s. A layered method is used to produce a hollow rod mirror. An aspheric rod mirror with a hollow area is formed by spreading glass powder on a powder bed using a powder spreading device, with the thickness of the powder spread set to 20um-50um. A fiber laser constructs an aspheric rod mirror with a hollow area layer by layer according to a scanning path. After the manufacturing is completed, the aspheric rod mirror is placed in an annealing furnace for annealing, and the temperature is raised to 400℃-600℃ at a rate of 1℃ / min-5℃ / min for 1h-3h, and then the temperature is lowered to 20℃-30℃ at a rate of 0.2℃ / min-2℃ / min to obtain an aspheric rod mirror with a hollow area. Step 5: preparing a nanocomposite coating solution using a disulfide bond cross-linked polymer solution, a silver nanoparticle dispersion, and a zwitterionic polymer solution, and spraying the solution on the surface of the aspheric rod mirror to impart self-repairing and antibacterial functions to the aspheric rod mirror; Step 6: Use ethylene oxide to sterilize the disposable aspheric rod mirror, remove the ethylene oxide and impurities on the surface of the disposable aspheric rod mirror, and then package the treated disposable aspheric rod mirror.

2. The method for preparing a disposable aspheric rod mirror according to claim 1, wherein: In the step 1, borosilicate glass blocks are selected as the basic raw material, and titanium oxide powder with a purity of 99% is added, and the amount of titanium oxide added is 1%-5% of the borosilicate glass blocks. The borosilicate glass blocks and titanium oxide powder are placed in a mixing tank and mixed at a rate of 200 r / min-400 r / min for 30 min-60 min for preliminary mixing. The borosilicate glass blocks and titanium oxide powder are ground using a ball mill, and 5 mm-10 mm zirconium oxide balls are used as grinding media. The grinding is carried out at a rate of 300 r / min-600 r / min for 12 h-36 h. After the grinding is completed, the glass powder is screened using a standard sieve to select glass powder with a particle size of 10 μm-50 μm.

3. The method for preparing a disposable aspheric rod mirror according to claim 2, wherein: In the step 2, a three-dimensional model of the aspheric rod mirror is designed using CAD software, the length of the aspheric rod mirror is set to 100 mm-300 mm, the diameter of the aspheric rod mirror is set to 2 mm-5 mm, and a streamlined hollow area is designed in the aspheric rod mirror model, the starting position of the hollow area is 10 mm-30 mm away from both ends of the aspheric rod mirror, the curvature radius of the hollow area is set to 2 mm-3 mm, the cross-section of the hollow area is set to an ellipse, the ratio of the major axis to the minor axis of the cross-section of the hollow area is set to 1.5-2:1, and the number of hollow areas is set to 10-20.

4. The method for preparing a disposable aspheric rod mirror according to claim 1, wherein: In the step 5, methyl methacrylate and methyl 2-mercaptoglycolate are mixed in an anhydrous toluene organic solvent at a ratio of 3-5:1, the reaction system is heated to 60° C.-80° C. under nitrogen protection and reacted for 6 h-12 h to obtain a thiol-containing polymer, the thiol-containing polymer is dissolved in dimethyl sulfoxide, hydrogen peroxide is added as an oxidation agent, and the reaction is stirred at room temperature for 2 h-4 h to form a disulfide cross-linked polymer solution.

5. The method for preparing a disposable aspheric rod mirror according to claim 4, characterized in that: In the step 5, silver nanoparticles are dispersed in an ethanol organic solvent to obtain a silver nanoparticle dispersion with a concentration of 1 mg / mL-10 mg / mL, sulfobetaine methacrylate polyzwitterionic polymer monomer is dissolved in the ethanol organic solvent, potassium persulfate initiator is added, and the mixture is reacted at a temperature of 60° C.-70° C. for 4 h-8 h to obtain a zwitterionic polymer solution, and the disulfide cross-linked polymer solution, the silver nanoparticle dispersion, and the zwitterionic polymer solution are mixed in an ethanol solvent in a volume ratio of 5:2:3, and an ultrasonic oscillator is used to treat the mixture at an ultrasonic power of 100 W-500 W for 30 min-60 min to form a nanocomposite coating solution.

6. The method for preparing a disposable aspheric rod mirror according to claim 5, characterized in that: In the step five, a spray gun is used to spray the nano-composite coating solution on the side surface of the aspheric rod mirror, a spiral spraying method is adopted, the angle between the spray gun and the side surface of the aspheric rod mirror is set between 80°-100°, the distance between the spray gun and the rod mirror is set to 15cm-30cm, the moving speed is set to 10cm / s-20cm / s, and the spraying is repeated 5 times. The coating formed by each spraying is 1um-2um, and the interval time of each spraying is 5min-15min. After the spraying is completed, the aspheric rod mirror coated with the nano-composite coating is placed at a temperature of 40°C-80°C and dried for 5h-10h to obtain a disposable aspheric rod mirror with a nano-composite coating.

7. The method for preparing a disposable aspheric rod mirror according to claim 6, characterized in that: In the step six, the disposable aspheric rod mirror is placed in a sealed ethylene oxide sterilizer, and the sterilization time is set to 1h-4h in an environment with a temperature of 37°C-63°C, a relative humidity of 40%-80%, and an ethylene oxide concentration of 450mg / L-1200mg / L. After sterilization, the disposable aspheric rod mirror is placed in a ventilated environment for analysis for 12h-24h. The disposable aspheric rod mirror that passes the inspection is inner-packaged with polyurethane foam, and a groove for storing the disposable aspheric rod mirror is cut into the polyurethane foam so that the disposable aspheric rod mirror is stuck in the groove, and a layer of buffer sponge with a thickness of 5mm-10mm is wrapped around the polyurethane foam. After the disposable aspheric rod mirror is placed, the inner package is sealed with a sealing bag made of barrier plastic film. When a heat sealing machine is used for sealing, the heat sealing temperature is between 120°C-200°C and the time is 2-5 seconds, so that the sealed bag after packaging has no air leakage or leaks.

Images