Disposable aspheric rod mirror

Abstract

The invention discloses a disposable aspheric rod mirror and relates to the technical field of rod mirrors, the method comprises the steps of preparing the aspheric rod mirror and treating the surface of the aspheric rod mirror, and the disposable aspheric rod mirror has the advantages that through designing a hollow area in the disposable aspheric rod mirror, the remarkable material reduction advantage is shown in the selective laser melting process; the selective laser melting technology is based on the principle that high-energy laser beams selectively melt glass powder layer by layer, the selective laser melting technology has high forming efficiency, and when an aspheric rod mirror with a hollow structure is manufactured, due to the fact that the size of a solid part is greatly reduced, the amount of materials needing to be treated by the laser beams is remarkably reduced, energy consumption is reduced, and production cost is reduced. In addition, the forming time is further shortened, the scanning path of the laser beam to the glass powder is simplified from the microscopic level, unnecessary reciprocating motion is reduced, and therefore the forming process is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of rod lenses, and particularly to an aspherical rod lens for single use. Background Art

[0002] An endoscope is an important tool for humans to peer into their own internal organs. Hippocrates, a famous ancient Greek doctor known as the father of medicine, once described a rectal viewer, which is very similar to the instruments we use today. These viewers were used to peer into the vagina and cervix, examine the rectum, and inspect the ears and nose. At that time, natural light was used for these examinations. The real development of endoscopes started in modern times. Generally, its development stages can be divided into: rigid endoscopes, semi-flexible endoscopes, fiber endoscopes, ultrasonic and electronic endoscopes, etc. The development of rigid endoscopes has gone through two stages: namely, the open rigid tube endoscope stage and the rigid tube endoscope stage with an optical system.

[0003] In order to achieve good optical properties, such as high refractive index, low dispersion, high transparency, etc., aspherical rod lenses often need to use special optical materials. Some high-quality optical glass or optical crystal materials are relatively costly in themselves. The mining, refining, and processing processes of these materials are complex, resulting in high raw material prices and increasing the production cost of aspherical rod lenses. During the manufacturing process of aspherical rod lenses, especially under traditional grinding and polishing processes, the material removal rate is relatively high. Due to the special shape of the aspherical surface, a large amount of grinding is required to achieve an accurate curved surface shape, which will cause a large amount of material waste. Therefore, we propose an aspherical rod lens for single use. Summary of the Invention

[0004] The purpose of the present invention is to provide an aspherical rod lens for single use.

[0005] To solve the problems raised in the above background art, the present invention provides the following technical solution: an aspherical rod lens for single use, including preparing the aspherical rod lens and surface treatment of the aspherical rod lens. The specific preparation steps of the aspherical rod lens for single use are as follows:

[0006] Step 1: Prepare micron-sized glass powder from borosilicate glass blocks and add titanium oxide powder to change the network structure connection mode of the aspherical rod lens.

[0007] Step 2: Use CAD software to design a three-dimensional model of the aspherical rod lens, and design a streamlined hollow area inside the aspherical rod lens to guide the light to pass smoothly and reduce the sudden change of light at the boundary.

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

[0009] Step 4: Slice and layer the aspherical rod lens model, and use selective laser melting technology to stack the thin slices to fabricate the aspherical rod lens. Adopt a layering strategy to dynamically select an appropriate layer thickness to adapt to the curvature of the aspherical rod lens;

[0010] Step 5: Prepare a nano-composite coating solution using a disulfide bond-crosslinked polymer solution, a silver nanoparticle dispersion, and an amphoteric ion polymer solution, and spray it on the surface of the aspherical rod lens to endow the aspherical rod lens with self-healing and antibacterial functions;

[0011] Step 6: Sterilize the disposable aspherical rod lens using ethylene oxide, remove the ethylene oxide and impurities on the surface of the disposable aspherical rod lens, and then package the treated disposable aspherical rod lens.

[0012] As a further solution of the present invention: In the said Step 1, select a borosilicate glass block as the basic raw material, and add titanium oxide powder with a purity of 99%. The addition amount of titanium oxide is 1%-5% of the borosilicate glass block. Put the borosilicate glass block and titanium oxide powder into a mixing tank, and mix them at a rate of 200 r / min - 400 r / min for 30 min - 60 min for preliminary mixing. Use a ball mill to grind the borosilicate glass block and titanium oxide powder, use 5 mm - 10 mm zirconia balls as the grinding medium, and grind at a rate of 300 r / min - 600 r / min for 12 h - 36 h. After grinding, use a standard sieve to screen the glass powder, and select the glass powder with a particle size of 10 μm - 50 μm.

[0013] As a further solution of the present invention: In the said Step 2, use CAD software to design the three-dimensional model of the aspherical rod lens. Set the length of the aspherical rod lens to 100 mm - 300 mm, set the diameter of the aspherical rod lens to 2 mm - 5 mm, and design a streamlined hollowed-out area in the aspherical rod lens model. The starting position of the hollowed-out area is 10 mm - 30 mm away from both ends of the aspherical rod lens. Set the radius of curvature of the hollowed-out area to 2 mm - 3 mm. Set the cross-section of the hollowed-out area to an ellipse, and set the ratio of the major axis to the minor axis of the cross-section of the hollowed-out area to 1.5 - 2:1. Set the number of the hollowed-out areas to 10 - 20.

[0014] As a further solution of the present invention: In the said Step 3, import the designed aspherical rod lens model with a streamlined hollowed-out area into an optical simulation software, perform ray tracing and optical performance analysis. By simulating the propagation of light in the rod lens, evaluate the influence of the hollowed-out area on light transmission, focusing, and aberration. According to the analysis results, adjust and optimize the shape, position, and size parameters of the hollowed-out area, and then perform slicing processing on the designed model. Set the thickness of the slice to 0.1 mm - 0.5 mm.

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

[0016] As a further solution of the present invention: in the step five, methyl methacrylate and methyl 2-mercaptoacetate are mixed in an anhydrous toluene organic solvent at a ratio of 3 - 5:1, and the reaction system is heated to 60℃ - 80℃ 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, and hydrogen peroxide oxidant is added, and the reaction is stirred at room temperature for 2 h - 4 h to form a disulfide bond-crosslinked polymer solution.

[0017] As a further solution of the present invention: in the step five, 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. The sulfobetaine methacrylate polyzwitterionic polymer monomer is dissolved in an ethanol organic solvent, potassium persulfate initiator is added, and the reaction is carried out at a temperature of 60℃ - 70℃ for 4 h - 8 h to obtain a zwitterionic polymer solution. The disulfide bond-crosslinked polymer solution, the silver nanoparticle dispersion, and the zwitterionic polymer solution are mixed in an ethanol solvent at a volume ratio of 5:2:3, and an ultrasonic oscillator is used to treat them at an ultrasonic power of 100 W - 500 W for 30 min - 60 min to form a nano-composite coating solution.

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

[0019] As a further solution of the present invention: in the step six, the disposable aspheric rod lens is placed in a sealed ethylene oxide sterilizer. In an environment with a temperature of 37°C - 63°C, a relative humidity of 40% - 80%, and an ethylene oxide concentration of 450 mg / L - 1200 mg / L, the sterilization time is set to be 1 h - 4 h. After sterilization, the disposable aspheric rod lens is placed in a ventilated environment for analysis for 12 h - 24 h. The qualified disposable aspheric rod lenses are internally packaged with polyurethane foam. The polyurethane foam is cut out with a groove for storing the disposable aspheric rod lens, so that the disposable aspheric rod lens is stuck in the groove, and a layer of buffer sponge with a thickness of 5 mm - 10 mm is wrapped around the polyurethane foam. After the disposable aspheric rod lens is placed, the internal package is sealed with a sealed bag made of barrier plastic film. When using a heat sealer for the sealing operation, the heat sealing temperature is between 120°C and 200°C, and the time is 2 - 5 seconds, so that there is no air leakage and seam leakage in the sealed bag after packaging.

[0020] Adopting the above technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. By designing a hollow area in the disposable aspheric rod lens, the present invention shows significant material reduction advantages during the selective laser melting process. The selective laser melting technology is based on the principle of selectively melting glass powder layer by layer with a high-energy laser beam and inherently has a high forming efficiency. When manufacturing an aspheric rod lens with a hollow structure, since the volume of the solid part is greatly reduced, the amount of material that the laser beam needs to process is significantly reduced. This not only reduces energy consumption but also further shortens the forming time. At the microscopic level, the scanning path of the laser beam for the glass powder is simplified, reducing unnecessary reciprocating motion, thereby accelerating the forming process. For the large-scale production of disposable aspheric rod lenses, it can directly reduce the corresponding proportion of powder procurement volume. At the same time, the shortening of the forming time means that the usage time of the equipment is reduced, reducing production costs such as equipment depreciation and energy consumption, and comprehensively improving production efficiency;

[0022] 2. By designing a hollow area in the disposable aspheric rod lens, the present invention can change the propagation path of light inside the rod lens. By reasonably designing the shape and position of the hollow area, the number of reflections and refractions of light inside the rod lens can be effectively reduced, and light loss can be decreased. For an aspheric rod lens, the hollow area can be used as an auxiliary means to correct aberrations. By adjusting the distribution and shape of the hollow area, the aberrations generated during the propagation of light can be compensated to a certain extent.

[0023] 3. The zwitterionic polymer solution of the present invention usually has good optical transparency. After forming a nanocomposite coating, it can effectively reduce the reflectivity of the surface of the aspheric rod lens. The disulfide bond-crosslinked polymer can provide certain structural stability to the coating and can maintain the optical performance of the coating stable under different environmental conditions such as temperature and humidity. Silver nanoparticles have excellent antibacterial properties. When dispersed in the composite coating solution and sprayed on the surface of the aspheric rod lens, they can effectively inhibit the growth and reproduction of microorganisms such as bacteria and fungi. Due to the presence of the disulfide bond-crosslinked polymer, the silver nanoparticles can be more stably dispersed in the coating, avoiding particle aggregation and rapid release. This structure enables the antibacterial component to play a long-term role and extends the antibacterial effective period of the aspheric rod lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the preparation process of the disposable aspheric rod lens in the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following further describes the specific embodiments of the present invention with reference to the drawings. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] A disposable aspheric rod lens of the present invention includes preparing an aspheric rod lens and treating the surface of the aspheric rod lens. The specific preparation steps of the disposable aspheric rod lens are as follows:

[0027] Step 1: Prepare micron-sized glass powder from a borosilicate glass block and add titanium oxide powder to change the network structure connection mode of the aspheric rod lens.

[0028] Step 2: Use CAD software to design a three-dimensional model of the aspheric rod lens and design a streamlined hollow area inside the aspheric rod lens to guide the smooth passage of light and reduce the sudden change of light at the boundary.

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

[0030] Step Four: Slice and layer the aspheric rod lens model, and use selective laser melting technology to stack the thin slices to fabricate the aspheric rod lens. Adopt a layering strategy to dynamically select an appropriate layer thickness to adapt to the curvature of the aspheric rod lens;

[0031] Step Five: Prepare a nano-composite coating solution using a disulfide bond-crosslinked polymer solution, a silver nanoparticle dispersion, and an amphoteric ion polymer solution, and spray it on the surface of the aspheric rod lens to endow the aspheric rod lens with self-healing and antibacterial functions;

[0032] Step Six: Sterilize the disposable aspheric rod lens using ethylene oxide, remove the ethylene oxide and impurities on the surface of the disposable aspheric rod lens, and then package the processed disposable aspheric rod lens.

[0033] In an embodiment of the present invention: In Step One, select a borosilicate glass block as the basic raw material, and add titanium oxide powder with a purity of 99%. The addition amount of titanium oxide is 1%-5% of the borosilicate glass block. Put the borosilicate glass block and titanium oxide powder into a mixing tank, and mix them at a rate of 200 r / min - 400 r / min for 30 min - 60 min for preliminary mixing. Use a ball mill to grind the borosilicate glass block and titanium oxide powder, use 5 mm - 10 mm zirconia balls as the grinding medium, and grind at a rate of 300 r / min - 600 r / min for 12 h - 36 h. After grinding, use a standard sieve to screen the glass powder, and select the glass powder with a particle size of 10 um - 50 um.

[0034] In an embodiment of the present invention: In Step Two, use CAD software to design a three-dimensional model of the aspheric rod lens. Set the length of the aspheric rod lens to 100 mm - 300 mm, the diameter of the aspheric rod lens to 2 mm - 5 mm, and design a streamlined hollowed-out area in the aspheric rod lens model. The starting position of the hollowed-out area is 10 mm - 30 mm away from both ends of the aspheric rod lens. The radius of curvature of the hollowed-out area is set to 2 mm - 3 mm. Set the cross-section of the hollowed-out area to an ellipse, and the ratio of the major axis to the minor axis of the cross-section of the hollowed-out area is set to 1.5 - 2:1. The number of hollowed-out areas is set to 10 - 20.

[0035] In an embodiment of the present invention: In Step Three, import the designed aspheric rod lens model with a streamlined hollowed-out area into an optical simulation software, perform ray tracing and optical performance analysis. By simulating the propagation of light in the rod lens, evaluate the influence of the hollowed-out area on light transmission, focusing, and aberration. According to the analysis results, adjust and optimize the shape, position, and size parameters of the hollowed-out area, and then perform slicing on the designed model. The thickness of the slice is set to 0.1 mm - 0.5 mm.

[0036] In one embodiment of the present invention: In step four, a fiber laser with a wavelength in the range of 1060 nm - 1080 nm is used to melt the glass powder. The size of the light spot is controlled within 50 μm - 100 μm, the laser power is set to 100 W - 300 W, and the scanning speed is set to 50 mm / s - 100 mm / s. The aspherical rod lens with a hollow area is manufactured by a layer-by-layer method. The glass powder is spread on the powder bed using a powder spreading device, and the thickness of the powder spreading is set to 20 μm - 50 μm. The fiber laser constructs the aspherical rod lens with a hollow area layer by layer according to the scanning path. After manufacturing, the aspherical rod lens is placed in an annealing furnace for annealing. It is heated to 400°C - 600°C at a rate of 1°C / min - 5°C / min and annealed for 1 h - 3 h, and then cooled to 20°C - 30°C at a rate of 0.2°C / min - 2°C / min to obtain the aspherical rod lens with a hollow area.

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

[0038] In one embodiment of the present invention: In step five, silver nanoparticles are dispersed in an ethanol organic solvent to obtain a silver nanoparticle dispersion with a concentration in the range of 1 mg / mL - 10 mg / mL. The sulfobetaine methacrylate polyzwitterionic polymer monomer is dissolved in an ethanol organic solvent, and potassium persulfate initiator is added, and the reaction is carried out at a temperature of 60°C - 70°C for 4 h - 8 h to obtain a zwitterionic polymer solution. The disulfide bond-crosslinked 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 process them at an ultrasonic power of 100 W - 500 W for 30 min - 60 min to form a nanocomposite coating solution.

[0039] In an embodiment of the present invention: In step five, a nano-composite coating solution is sprayed on the side surface of the aspherical rod lens using a spray gun, and a spiral spraying method is adopted. The angle between the spray gun and the side surface of the aspherical rod lens is set between 80° and 100°, the distance between the spray gun and the rod lens is set to 15 cm - 30 cm, the moving speed is set to 10 cm / s - 20 cm / s, and it is sprayed repeatedly 5 times. The coating formed each time is 1 um - 2 um, and the interval time between each spraying is 5 min - 15 min. After spraying, the aspherical rod lens coated with the nano-composite coating is placed at a temperature of 40°C - 80°C for drying for 5 h - 10 h to obtain a disposable aspherical rod lens with a nano-composite coating.

[0040] In an embodiment of the present invention: In step six, the disposable aspherical rod lens is placed in a sealed ethylene oxide sterilizer. In an environment with a temperature of 37°C - 63°C, a relative humidity of 40% - 80%, and an ethylene oxide concentration of 450 mg / L - 1200 mg / L, the sterilization time is set to 1 h - 4 h. After sterilization, the disposable aspherical rod lens is placed in a ventilated environment for analysis for 12 h - 24 h. The qualified disposable aspherical rod lenses are internally packaged using polyurethane foam. The polyurethane foam is cut out with a groove for storing the disposable aspherical rod lens, so that the disposable aspherical rod lens is stuck in the groove, and a layer of buffer sponge with a thickness of 5 mm - 10 mm is wrapped around the polyurethane foam. After the disposable aspherical rod lens is placed, the internal packaging is sealed with a sealed bag made of barrier plastic film. When using a heat sealer for the sealing operation, the heat sealing temperature is between 120°C and 200°C, and the time is 2 - 5 seconds, so that there is no air leakage and seam leakage in the packaged sealed bag.

[0041] Example 1: Use a fiber laser with a wavelength of 1080 nm to melt glass powder. The size of the light spot is controlled at 50 um, and the laser power is set to 200 W to ensure that the glass powder can be fully melted and sintered, while avoiding excessive melting causing channel deformation or excessive fusion with surrounding materials. The scanning speed is set to 50 mm / s, which helps to ensure the accuracy and quality of the channel wall and prevent defects such as holes and discontinuities. An aspherical rod lens with a hollow area is manufactured by a layer-by-layer method. The glass powder is spread on the powder bed using a powder spreading device, and the thickness of the spread powder is set to 20 um. A thinner powder layer thickness is beneficial for more precisely controlling the shape and size when manufacturing the channel. The fiber laser constructs an aspherical rod lens with a hollow area layer by layer according to the scanning path. After manufacturing, the aspherical rod lens is placed in an annealing furnace for annealing. It is heated to 600°C at a rate of 5°C / min and annealed 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 performance stability of the rod lens, obtaining an aspherical rod lens with a hollow area.

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

[0043] Example 3: Mix a disulfide bond-crosslinked polymer solution, a silver nanoparticle dispersion, and an amphoteric ion polymer solution in an ethanol solvent in a volume ratio of 5:2:3. Use an ultrasonic oscillator to process it for 60 min at an ultrasonic power of 100 W to form a nano-composite coating solution. Use a spray gun to spray the nano-composite coating solution on the side surface of the aspheric rod lens. Set the distance between the spray gun and the rod lens to 15 cm, the moving speed to 10 cm / s, and spray repeatedly 5 times. The coating formed each time is 1 um, and the interval time between each spraying is 15 min. After spraying, place the aspheric rod lens coated with a 5-um-thick nano-composite coating at a temperature of 60 °C and dry it for 80 h to obtain a disposable aspheric rod lens with a nano-composite coating.

[0044] As shown in the Figure 1 accompanying drawings, use CAD software to design a 3D model of an aspheric rod lens with a hollow structure, and use the selective laser melting technology to manufacture an aspheric rod lens with a hollow structure.

[0045] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principles and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.

[0046] In the description of the specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The above content is merely an example and explanation of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the specific embodiments described, or use similar methods for substitution, as long as they do not deviate from the invention or exceed the scope defined by this claim book, they shall fall within the protection scope of the present invention.

[0048] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A disposable aspheric rod mirror, comprising preparing the aspheric rod mirror and treating the surface of the aspheric rod mirror, characterized in that: 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 three-dimensional model of the aspheric rod mirror, and design a streamlined hollow area inside the aspheric rod mirror to guide the light to pass smoothly and reduce the sudden change of the 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; Step 4: Slice and layer the aspheric rod mirror model, use laser selective melting technology to stack the slices to produce the aspheric rod mirror, and use a layering strategy to dynamically select the appropriate layer thickness to adapt to the curvature of the aspheric rod mirror; Step 5: Prepare a nanocomposite coating solution using a disulfide cross-linked polymer solution, a silver nanoparticle dispersion and a zwitterionic polymer solution, and spray the solution on the surface of the aspheric rod mirror to give the aspheric rod mirror self-repair and antibacterial functions; 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 disposable aspheric rod lens according to claim 1, characterized in that: 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 put into a mixing tank, and mixed at a rate of 200r / min-400r / min for 30min-60min for preliminary mixing. The borosilicate glass blocks and titanium oxide powder are ground using a ball mill, and 5mm-10mm zirconium oxide balls are used as grinding media. The grinding is carried out at a rate of 300r / min-600r / min for 12h-36h. After the grinding is completed, the glass powder is screened using a standard sieve to select glass powder with a particle size of 10um-50um.

3. The disposable aspheric rod lens according to claim 2, characterized in that: 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 radius of curvature 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 disposable aspheric rod lens according to claim 3, characterized in that: In the step three, the designed aspheric rod mirror model with streamlined hollow area is imported into the 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.

5. The disposable aspheric rod lens according to claim 4, characterized in that: 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 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 increased to 400℃-600℃ at a rate of 1℃ / min-5℃ / min for annealing for 1h-3h, and then decreased to 20℃-30℃ at a rate of 0.2℃ / min-2℃ / min to obtain an aspheric rod mirror with a hollow area.

6. The disposable aspheric rod lens according to claim 1, characterized in that: In the step 5, 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 6h-12h 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 2h-4h to form a disulfide cross-linked polymer solution.

7. The disposable aspheric rod lens according to claim 6, 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 reaction is carried out 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 at 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.

8. The disposable aspheric rod lens according to claim 7, 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, the spraying is repeated 5 times, the coating formed by each spraying is 1um-2um, 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 to dry for 5h-10h, and a disposable aspheric rod mirror with a nano-composite coating is obtained.

9. The disposable aspheric rod lens according to claim 8, 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 a 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 and seam leakage.

Images