Contact lens uniform curing device and method based on illumination regulation and control

Abstract

The invention relates to a contact lens uniform curing device and method based on illumination regulation and control, and the device comprises a contact lens forming mold, and the upper and lower sides of the contact lens forming mold are respectively provided with a reflection cup and a light source array; the reflection cup is fixedly arranged below the contact lens forming mold, a reflection light source is fixedly arranged in the reflection cup, reflection sheets are arranged above the reflection light source at intervals, and the reflection sheets are of prism structures with the surfaces plated with high-reflection films and used for ensuring that light can be efficiently reflected to the inner wall of the reflection cup. The light-emitting surface of the reflection light source and the inner wall of the reflection cup are arranged in an inclined angle and / or in parallel, so that light rays are reflected once by the inner wall of the reflection cup to form vertically upward collimated light beams, and the collimated light beams are located at the edge positions of the two sides of the contact lens forming mold; the light source array is fixedly arranged above the contact lens forming mold, and light beams of the light source array and the collimated light beams are arranged in a mirror image manner and are matched with the collimated light beams below the light source array to form uniform illumination distribution.

Description

Technical Field

[0001] This application relates to the field of contact lens manufacturing, and particularly to a contact lens uniform curing device and method based on light control. Background Art

[0002] Currently, during the preparation of contact lenses, glue is injected into the shell mold, then the mold is closed, and the glue is cured by a UV lamp. Due to the spherical shape of the lens structure, there are differences in the light sources received by the edge position and the center position, resulting in differences in curing, which affects the quality of the finished product.

[0003] In Chinese Patent CN105328845A, a contact lens UV curing device is disclosed, which includes a first reflector with at least one ultraviolet lamp tube and a light-shielding cover inside. One side of the light-shielding cover 301 is arranged on one side of the ultraviolet lamp tube; a second reflector, the peripheral edge of the side opening of which is hermetically connected to the peripheral edge of the side opening of the first reflector, and a light-transmitting tube is arranged inside the second reflector; an electric device with a rotating shaft and a gas pipeline inside. One end of the rotating shaft is joined to one end of the light-transmitting tube, and the gas pipeline is connected to the light-transmitting tube in a communicating manner.

[0004] In the above solution, the first reflector and the ultraviolet lamp tube cooperate with the light-shielding cover to preliminarily reflect and block light. However, during the actual curing process of contact lenses, although the light emitted by the ultraviolet lamp tube inside the first reflector can reduce the interference of stray light after being blocked by the light-shielding cover, the reflection path of the light inside the reflector is relatively complex, making it difficult to ensure that the optical fiber evenly covers the entire spherical lens. Especially in the edge area, due to the small vertical light received at its inclined angle, there are slight differences in the light receiving angles of the edge position and the center position with respect to the light source, resulting in the uneven distribution of the UV optical fiber on the lens surface, which directly affects the curing effect of the glue. For example, the edge area of the lens may not be fully cured due to insufficient light; the center area of the lens may be over-cured or deformed due to excessive light.

[0005] Therefore, we hereby propose a contact lens uniform curing device and method based on light control. Summary of the Invention

[0006] The main purpose of this application is to provide a contact lens uniform curing device and method based on light control, aiming to solve the problem of uneven curing of the edge area of spherical lenses in the prior art.

[0007] To achieve the above object, the present application provides a uniform curing device for contact lenses based on light control, comprising: a contact lens forming mold, with a reflecting cup and a light source array respectively arranged on the upper and lower sides of the contact lens forming mold; the reflecting cup is fixedly arranged below the contact lens forming mold, and a reflecting light source is fixedly arranged inside it. A reflecting sheet is arranged at an interval above the reflecting light source. The reflecting sheet is arranged in a prism structure with a high-reflectivity film plated on its surface, which is used to ensure that light can be efficiently reflected to the inner wall of the reflecting cup. The light-emitting surface of the reflecting light source is arranged at an inclination angle and / or parallel to the inner wall of the reflecting cup, so that the light forms a collimated beam vertically upward after being reflected by the inner wall of the reflecting cup once, and the collimated beam forms an annular area outside the contact lens forming mold to supplement the curing light intensity at the edge position; the light source array is fixedly arranged above the contact lens forming mold, and the light beam of the light source array is arranged as a mirror image of the collimated beam and cooperates with the collimated beam below it to form a uniform light distribution.

[0008] In one of the embodiments, the reflecting sheet is arranged in an arc structure, and its radian is the same as that of the inner wall of the reflecting cup.

[0009] In one of the embodiments, a light-shielding cover is arranged outside the light source array, and the opening diameter of the light-shielding cover and the opening diameter of the reflecting cup are both adapted to the outer diameter size of the contact lens forming mold to form a precise light channel.

[0010] In one of the embodiments, a light-transmitting sheet is arranged between the reflecting cup and the contact lens forming mold; The light-transmitting sheet includes: a base layer, an oxide layer for isolation and protection is arranged on the base layer, a waveguide layer is arranged on the oxide layer, a refractive index matching layer and an antireflection film layer are sequentially stacked above the waveguide layer, and the refractive index of the refractive index matching layer is between the waveguide layer and the curing material.

[0011] In one of the embodiments, a hydrophobic fluorocarbon antifouling coating is arranged on the outermost layer of the light-transmitting sheet, and the thickness of the coating is controlled within the range of 50 - 80 nm.

[0012] In one of the embodiments, the base layer is composed of a composite film of silver nanowires and zinc oxide. Among them, the diameter of the silver nanowires is controlled within the range of 20 - 40 nm and is embedded in the zinc oxide matrix in a three-dimensional network structure.

[0013] In one of the embodiments, the molar ratio of silver nanowires to zinc oxide is 1:8 - 1:12.

[0014] In one of the embodiments, the refractive index matching layer is composed of a composite of hydroxyethyl methacrylate and nano-cerium oxide, and its refractive index is gradient-regulated between 1.52 - 1.68.

[0015] In one of the embodiments, the refractive index matching layer is provided with a ridge structure and / or a wedge structure, and the length and width of each layer of the stepped structure in the refractive index matching layer are gradually reduced layer by layer from top to bottom in the direction perpendicular to the upper surface of the substrate, forming a three-dimensional gradient refractive index distribution.

[0016] To achieve the above object, the present application further provides a method for uniformly curing a contact lens based on light control, including the following steps: Precisely suspend the contact lens forming mold directly above the reflector cup at a distance of 15 - 20 mm, ensuring that the relative positions of the mold, the reflector cup, and the light source array are fixed, forming a symmetric illumination field; Place the light-transmitting sheet between the reflector cup and the contact lens forming mold, and turn on the reflective light source and the light source array inside the reflector cup; Adjust the curvature of the reflective sheet and the tilt angle of the reflective light source so that the collimated beam below and the beam of the light source array above are mirror images of each other, covering the upper and lower surfaces of the contact lens forming mold to form a uniform illumination field; Cure the photosensitive resin in the contact lens forming mold through the uniform illumination field formed in the above steps; After curing is completed, turn off the reflective light source and the light source array, separate the inner and outer molds of the contact lens forming mold, and take out the formed contact lens.

[0017] The present invention has the following technical effects: Through the combination of the reflective light source inside the reflector cup and the reflective sheet, and by using the high-reflection film of the prism structure, it is ensured that the light is efficiently reflected on the inner wall of the reflector cup. At the same time, the light-emitting surface of the reflective light source is set at an angle with the inner wall of the reflector cup, so that the light forms a vertically upward collimated beam after one reflection, improving the utilization rate of the light, ensuring the stability and directivity of the collimated beam, and the light source array is fixedly arranged above the contact lens forming mold, and its beam is set as a mirror image of the collimated beam below, so that the light can be evenly irradiated to each part of the contact lens forming mold, avoiding the problem of uneven illumination that may occur in the traditional curing process.

[0018] On the other hand, through the collaborative work of the reflector cup and the light source array, and the cooperation of the upper and lower beams, the light can evenly penetrate the photosensitive resin, promoting its rapid and uniform curing, reducing the problem of uneven stress distribution inside the contact lens, as well as the defect rate and scrap rate during the curing process.

[0019] At the same time, the reflective sheet reflects the light emitted by the reflective light source more concentratedly to the inner wall of the reflector cup, and then forms a vertically upward collimated beam after one reflection on the inner wall. Since the curvature of the reflective sheet is consistent with the inner wall of the reflector cup, the light can maintain higher directivity and consistency during the reflection process, avoiding the problem of light divergence caused by uneven reflection surfaces or inaccurate angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic structural diagram of a uniform curing device for contact lenses in an embodiment of the present application; Figure 2 FIG.

[0020] is an exploded view of the structure of a uniform curing device for contact lenses in an embodiment of the present application; Figure 3 FIG. Figure 1 is an exploded view of the structure of a uniform curing device for contact lenses in another embodiment of the present application; Figure 4 FIG. is an exploded view of the structure of a uniform curing device for contact lenses in still another embodiment of the present application; Figure 5 FIG. Figure 2 is a schematic structural diagram of a light-transmitting sheet in an embodiment of the present application; Figure 6 FIG. is a schematic structural diagram of a terminal device in an embodiment of the present application.

[0021] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0023] In addition, if the description in the present application involves "first", "second", etc., it is only for descriptive purposes (such as for distinguishing the same or similar elements), and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0024] Referring to Figure 1 - Figure 2 , the present application provides a uniform curing device for contact lenses based on light control, including: a contact lens forming mold 100, which is made of a transparent photosensitive resin, and a reflecting cup 200 and a light source array 300 are respectively arranged on its upper and lower sides; The reflector cup 200 is fixedly arranged below the contact lens forming mold 100, and a reflection light source 201 is fixedly arranged inside it. A reflection sheet 202 is arranged at an interval above the reflection light source 201. The reflection sheet 202 is arranged in a prism structure with a high-reflection film plated on its surface, which is used to ensure that the light can be efficiently reflected to the inner wall of the reflector cup 200. The light-emitting surface of the reflection light source 201 is arranged at an inclination angle and / or parallel to the inner wall of the reflector cup 200, so that the light forms a collimated beam vertically upward after being reflected by the inner wall of the reflector cup 200 once, and the collimated beam forms an annular area outside the contact lens forming mold 100 to supplement the curing light intensity at the edge position; the light source array 300 is fixedly arranged above the contact lens forming mold 100, and the light beam of the light source array 300 is arranged as a mirror image of the collimated beam and cooperates with the collimated beam below it to form a uniform light distribution.

[0025] In this embodiment, through the combination of the reflection light source 201 and the reflection sheet 202 inside the reflector cup 200, and by using the high-reflection film of the prism structure, it is ensured that the light is efficiently reflected on the inner wall of the reflector cup 200. At the same time, the light-emitting surface of the reflection light source 201 is arranged at a 45-degree inclination angle with the inner wall of the reflector cup 200, so that the light forms a collimated beam vertically upward after being reflected once, improving the utilization rate of the light, ensuring the stability and directivity of the collimated beam, and the light source array 300 is fixedly arranged above the contact lens forming mold 100, and its light beam is arranged as a mirror image of the collimated beam below it, so that the light can be evenly irradiated to each part of the contact lens forming mold 100, avoiding the problem of uneven light irradiation that may occur in the traditional curing process.

[0026] On the other hand, through the coordinated work of the reflector cup 200 and the light source array 300, and the cooperation of the upper and lower light beams, the light can evenly penetrate the photosensitive resin, promoting its rapid and uniform curing, reducing the problem of uneven stress distribution inside the contact lens, as well as the defect rate and scrap rate during the curing process.

[0027] Furthermore, the contact lens forming mold 100 includes: an outer mold 101 and an inner mold 102. The outer mold 101 and the inner mold 102 are nested and matched with each other, and the inner wall shape of the outer mold 101 is adapted to the outer contour of the finally formed contact lens lens, providing an external shape constraint for the molding of the lens. The inner mold 102 is located inside the outer mold 101, and its outer wall shape is adapted to the inner contour of the lens to be molded, and a gap for accommodating the photosensitive resin is left between the inner wall of the inner mold 102 and the outer wall of the outer mold 101.

[0028] Among them, the outer mold 101 is made of a resin material with high transparency, such as polymethyl methacrylate (PMMA) or polycarbonate (PC), to ensure the light penetration during transmission, reduce energy loss, and provide stable external support for the lens forming; while the inner mold 102 is made of a transparent material with a refractive index similar to that of the photosensitive resin material, such as cycloolefin copolymer (COC) or polystyrene (PS), to reduce the reflection and scattering of light on the mold surface, thereby ensuring the uniformity of energy transfer during the photocuring process.

[0029] In one of the embodiments, the reflective sheet 202 is arranged in an arc structure, and its radian is consistent with the radian of the inner wall of the reflector cup 200.

[0030] In this embodiment, the light emitted by the reflective light source 201 is more concentratedly reflected to the inner wall of the reflector cup 200 through the arc-shaped reflective sheet 202, and then a collimated beam perpendicular to the upward direction is formed through a single reflection on the inner wall. Since the radian of the reflective sheet 202 is consistent with the inner wall of the reflector cup 200, the light can maintain higher directivity and consistency during the reflection process, avoiding the problem of light divergence caused by uneven reflection surfaces or inaccurate angles.

[0031] In one of the embodiments, the contact lens forming mold 100 is suspended 15 - 20 mm directly above the reflector cup 200 through the positioning mechanism 400.

[0032] In this embodiment, by suspending the contact lens forming mold 100 15 - 20 mm directly above the reflector cup 200 through the positioning mechanism 400, while ensuring that the light can fully penetrate the photosensitive resin to promote its rapid and uniform curing, it can also avoid problems such as energy loss or uneven curing caused by excessive light penetration, and can precisely cooperate with the collimated beam formed by the reflective light source 201 in the reflector cup 200 to form a symmetric and uniform illumination field covering the entire contact lens forming mold 100, achieving uniform distribution and efficient utilization of light.

[0033] On the other hand, the positioning mechanism 400 can also ensure that the contact lens forming mold 100 maintains a stable position and posture during the curing process, avoiding problems such as uneven illumination or curing defects caused by vibration or displacement, and can precisely adjust the distance between the mold and the reflector cup 200 according to different types of contact lens forming molds 100 or curing requirements to further optimize the illumination effect.

[0034] See Figure 3 , in one of the embodiments, a light-shielding cover 301 is provided outside the light source array 300 to shield the interference of external light on the curing process and ensure that the light beam emitted by the light source array 300 can be concentrated and effectively participate in the uniform curing of the contact lens forming mold 100.

[0035] Furthermore, the opening diameter of the light shield 301 and the opening diameter of the reflecting cup 200 are both adapted to the outer diameter dimension of the contact lens forming mold 100, forming a precise light path.

[0036] In this embodiment, a closed light path is formed by the opening diameters of the light shield 301 and the reflecting cup 200 that match the outer diameter dimension of the contact lens forming mold 100, ensuring that the light beam emitted by the light source can completely cover the mold surface, avoiding light scattering or light leakage, thereby improving the light energy utilization rate and avoiding problems such as "edge effect" or "central overexposure" in traditional curing processes.

[0037] In one of the embodiments, the light shield 301 adopts a double-layer light shield 301 structure.

[0038] Specifically, the outer layer of the light shield 301 is made of light-absorbing material, and the inner layer is made of high-reflectivity material. For example, the outer layer of the light shield 301 can adopt light-absorbing materials such as black matte coating or light-absorbing flannelette, which can effectively absorb external stray light and reduce the interference caused by internal light reflection; the inner layer is selected from polished aluminum plates, silver-plated reflective films or high-reflectivity microstructured materials to enable efficient directional reflection of light inside the shield. Further, the double-layer structure of the light shield 301 can be connected by snap-in nesting, and a 1-2 mm air heat insulation layer is reserved between the outer layer and the inner layer, which not only ensures the structural stability but also avoids heat conduction loss.

[0039] In this embodiment, through the synergistic effect of the outer light-absorbing material and the inner high-reflectivity material, the light management ability of the light shield 301 reaches a higher level. Among them, the outer light-absorbing material can accurately absorb stray light from all directions outside, blocking all external light that may interfere with the curing process and creating a highly pure "dark room" atmosphere for the curing environment. The inner high-reflectivity material can efficiently and directionally reflect the light beam emitted by the light source array 300, enabling the light to propagate along a predetermined path inside the shield, accurately focusing on the surface of the contact lens forming mold 100, realizing the precise projection of light, and ensuring that every area on the mold surface can receive uniform and sufficient light, greatly improving the uniformity and consistency of curing.

[0040] See Figure 4 - Figure 5 As shown in the figure, in one of the embodiments, a light-transmitting sheet 500 is provided between the reflecting cup 200 and the contact lens forming mold 100.

[0041] Among them, the light-transmissive sheet 500 includes: a base layer 501, an oxide layer 502 for isolation and protection of the underlying layer is provided on the base layer 501, a waveguide layer 503 is disposed on the oxide layer 502, a refractive index matching layer 504 and an anti-reflection film layer 505 are sequentially stacked above the waveguide layer 503, and the refractive index of the refractive index matching layer 504 is between that of the waveguide layer 503 and the curing material.

[0042] In this embodiment, by providing the oxide layer 502 for isolation and protection of the underlying layer on the base layer 501 of the light-transmissive sheet 500, the erosion and interference of the oxide layer 502 by external impurities, moisture, etc. are prevented, the stability and integrity of the oxide layer 502 are ensured, and thus the performance and service life of the entire light-transmissive sheet 500 are guaranteed. At the same time, the waveguide layer 503 guides and transmits light along a specific path, enabling the light to propagate orderly inside the light-transmissive sheet 500, and the refractive index matching layer 504 disposed above the waveguide layer 503 can effectively reduce the refractive index difference between the waveguide layer 503 and the curing material, reduce the reflection loss of light at the interface between the two, and enable more light to smoothly enter the curing material from the waveguide layer 503, improving the utilization rate of light energy.

[0043] On the other hand, the anti-reflection film layer 505 can increase the light transmittance by reducing the reflection of light on the surface of the light-transmissive sheet 500, enabling the light to pass through the light-transmissive sheet 500 more efficiently and reach the inside of the contact lens forming mold 100.

[0044] In one of the embodiments, a hydrophobic fluorocarbon anti-fouling coating is provided on the outermost layer of the light-transmissive sheet 500, and the thickness of the coating is controlled within the range of 50 - 80 nm.

[0045] In this embodiment, the hydrophobic fluorocarbon anti-fouling coating has an extremely low surface energy and excellent hydrophobic and oleophobic properties, and can effectively prevent external pollutants (such as fingerprints, oils, dust, proteins, etc.) from adhering to the surface of the light-transmissive sheet 500. Thus, by introducing the fluorocarbon anti-fouling coating, the cleaning and maintenance frequency is reduced, and the decrease in light transmittance or deterioration of optical performance caused by contamination are avoided. At the same time, the uniformity of the fluorocarbon coating can further reduce light scattering and surface reflection, and cooperate with the anti-reflection film layer 505 to achieve higher light transmittance and lower optical loss. And it can also reduce the frictional resistance between the light-transmissive sheet 500 and other components, reduce the risk of scratching or abrasion, and thus extend the service life of the light-transmissive sheet 500.

[0046] In one of the embodiments, the base layer 501 is composed of a composite film of silver nanowires and zinc oxide. The diameter of the silver nanowires is controlled in the range of 20 - 40 nm and they are embedded in the zinc oxide matrix in a three-dimensional network structure. This composite film is spin-coated on a polyimide substrate by a solution method and forms a flexible transparent substrate with a thickness of 120 - 150 μm after heat treatment at 150 - 180 °C. Its total light transmittance (380 - 780 nm) can reach 92.3% ± 0.5%, and the surface sheet resistance is lower than 15 Ω / □.

[0047] Among them, the molar ratio of silver nanowires to zinc oxide is 1:8 - 1:12, and a heterojunction structure is formed inside the composite film, which can generate a surface plasmon resonance effect under 405 nm ultraviolet light irradiation. This design enables the base layer 501 to have both high light transmittance and ultraviolet light waveguide enhancement characteristics. At the same time, the zinc oxide component endows the substrate with a self-cleaning function, and the 24-hour antibacterial rate against Staphylococcus aureus is up to 99.6% after testing.

[0048] Furthermore, the waveguide layer 503 adopts an alternating stacked structure of titanium dioxide / silicon dioxide prepared by atomic layer deposition technology. The thickness of each layer is precisely controlled at λ / 4n (λ = 405 nm, n is the refractive index of the material), forming a distributed Bragg reflector. This structure can confine more than 98.7% of the incident ultraviolet light energy within the waveguide layer 503 and conduct it radially to the curing area through the total reflection effect.

[0049] The refractive index matching layer 504 selects a composite system of 2-hydroxyethyl methacrylate and nano-cerium oxide. Its refractive index is gradient-regulated between 1.52 - 1.68 to achieve a progressive refractive transition from the waveguide layer 503 (n = 2.1) to the contact lens hydrogel material (n = 1.43).

[0050] In this embodiment, silver nanowires (with a diameter of 20 - 40 nm) are embedded in the zinc oxide matrix in a three-dimensional network structure. The antistatic function is achieved through the high conductivity of the silver nanowires (surface sheet resistance < 15 Ω / □) to avoid dust adsorption, and the self-cleaning ability of the substrate is also endowed by the ultraviolet photocatalytic characteristics of zinc oxide. Under ultraviolet light irradiation, the hydroxyl radicals (·OH) generated by zinc oxide can decompose organic pollutants, and together with the low adhesion of the fluorocarbon antifouling coating, a "dual antifouling mechanism" is formed. At the same time, the molar ratio of silver nanowires to zinc oxide (1:8 - 1:12) optimizes the charge separation efficiency of the heterojunction structure. Under 405 nm ultraviolet light excitation, the surface plasmon resonance (SPR) effect significantly enhances the local electromagnetic field intensity, improving the ability of the waveguide layer 503 to capture and conduct ultraviolet light.

[0051] On the other hand, an alternating stacked structure of titanium dioxide / silicon dioxide prepared by atomic layer deposition (ALD) (thickness of each layer = λ / 4n, λ = 405 nm) forms a distributed Bragg reflector using the refractive index difference (TiO2: n≈2.1, SiO2: n≈1.5), achieving efficient reflection of 405 nm ultraviolet light (>98.7%). Thus, the incident light is confined within the waveguide layer 503 through total internal reflection, reducing the transmission loss of light in the vertical direction. Meanwhile, it is conducted radially to the curing area to ensure that the light energy is accurately projected onto the key parts of the contact lens forming mold 100. Moreover, a refractive index matching layer 504 made of a composite material of hydroxyethyl methacrylate (HEMA) and nano-ceria realizes a gradual transition of the refractive index from 1.52 (close to the silicon dioxide layer) to 1.68 (close to the contact lens hydrogel material) by adjusting the filling ratio of nano-ceria particles, effectively solving the problem of sudden refractive index change between the waveguide layer 503 (n = 2.1) and the curing material (n = 1.43), and reducing the interface reflection loss to <0.5%. At the same time, the introduction of nano-ceria particles enhances the ultraviolet absorption ability of the matching layer, avoiding interference of scattered light not participating in the waveguide with the curing reaction and further improving the light energy utilization rate.

[0052] In one of the embodiments, the refractive index matching layer 504 is arranged in a ridge structure and / or a wedge structure, and the length and width of each layer's stepped structure in the refractive index matching layer 504 gradually decrease layer by layer from top to bottom in the direction perpendicular to the upper surface of the substrate, forming a three-dimensional gradually changing refractive index distribution.

[0053] In this embodiment, by gradually adjusting the material thickness (such as the filling ratio of the composite system of hydroxyethyl methacrylate and nano-ceria), a continuous transition of the refractive index from the waveguide layer 503 (n = 2.1) to the contact lens hydrogel (n = 1.43) is achieved, effectively reducing the sudden refractive index change at the interface.

[0054] Specifically, by setting gradually narrowing ridge-like protrusions in the horizontal direction (along the light propagation path), the divergent light can be dynamically focused to compensate for the diffusion loss of light during transmission; or by setting inclined wedge-shaped steps in the vertical direction (substrate normal direction), the optical path difference is adjusted using the wedge angle to further optimize the phase matching of light rays with different incident angles and reduce the coupling loss caused by the inclination of the optical path.

[0055] To achieve the above object, the present application also provides a method for uniformly curing a contact lens based on light control, including the following steps: The contact lens forming mold 100 is accurately suspended 15 - 20 mm directly above the reflecting cup 200 through the positioning mechanism 400 to ensure the relative positions of the mold, the reflecting cup 200, and the light source array 300 are fixed, forming a symmetric illumination field; Place the light-transmitting sheet 500 between the reflector cup 200 and the contact lens forming mold 100, and turn on the reflection light source 201 and the light source array 300 inside the reflector cup 200; Adjust the curvature of the reflection sheet 202 and the tilt angle of the reflection light source 201 so that the collimated light beam below and the light beam of the light source array 300 above are mirror images of each other, covering the upper and lower surfaces of the contact lens forming mold 100 to form a uniform illumination field; Cure the photosensitive resin in the contact lens forming mold 100 through the uniform illumination field formed in the above steps; After curing is completed, turn off the reflection light source 201 and the light source array 300, separate the inner and outer molds of the contact lens forming mold 100, and take out the formed contact lens.

[0056] In this embodiment, through the above steps, it is ensured that during the entire curing process, the light can uniformly penetrate the photosensitive resin. The combination of the reflection light source 201 and the reflection sheet 202 inside the reflector cup 200, in cooperation with the light source array 300, enables the light to irradiate the contact lens forming mold 100 symmetrically and uniformly from the upper and lower directions. Whether it is the edge position or the central area of the mold, it can receive light with appropriate intensity and uniform distribution, effectively avoiding common problems in traditional curing processes such as "edge effect" (i.e., too high or too low curing degree at the edge) or "central overexposure", ensuring that the curing speed and degree of the photosensitive resin in each part of the mold are consistent, so that the formed contact lens has high uniformity in terms of thickness, hardness, optical properties, etc., greatly improving the quality stability of the product. And it can also promote the rapid and uniform curing of the photosensitive resin, reduce the problem of uneven internal stress distribution caused by uneven curing, reduce the risk of lens defects, and improve the yield rate of the product.

[0057] Furthermore, the inner mold 102 of the contact lens forming mold 100 is made of a transparent material with a refractive index similar to that of the photosensitive resin material, reducing the reflection and scattering of light on the mold surface, ensuring the uniformity of energy transfer during the light curing process, and at the same time reducing the roughness of the lens surface caused by light scattering, improving the smoothness and comfort of the lens surface. On the other hand, the outermost hydrophobic fluorocarbon anti-fouling coating of the light-transmitting sheet 500 has extremely low surface energy and excellent hydrophobic and oleophobic properties, which can effectively prevent external pollutants from adhering to the surface of the light-transmitting sheet 500, reduce the cleaning and maintenance frequency, avoid the decrease in light transmittance or optical property deterioration caused by pollution, and at the same time reduce the frictional resistance between the light-transmitting sheet 500 and other components, extending the service life of the light-transmitting sheet 500. And the surface plasmon resonance effect generated by the silver nanowire and zinc oxide composite film substrate in the light-transmitting sheet 500 under ultraviolet light irradiation, as well as the high-efficiency conduction and confinement ability of the waveguide layer 503 to ultraviolet light, contribute to improving the ultraviolet resistance of the lens and protecting the eyes from ultraviolet damage.

[0058] In one of the embodiments, In addition, an embodiment of the present application further provides a terminal device, and the internal structure of the terminal device may be as Figure 3 shown. The terminal device includes a processor, a memory, a communication interface, and a database connected through a system bus. Among them, the processor is used to provide computing and control capabilities. The memory of the terminal device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the terminal device is used to store data called by the computer program. The communication interface of the terminal device is used to communicate with an external terminal. The input device of the terminal device is used to receive signals input by an external device. When the computer program is executed by the processor, it implements a method for uniformly curing a contact lens based on light control as in the above embodiments.

[0059] Those skilled in the art can understand that Figure 6 the structure shown in

[0060] is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the terminal device to which the solution of the present application is applied.

[0061] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, apparatus, article or uniform curing apparatus for light-regulated contact lenses including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, apparatus, article or uniform curing apparatus for light-regulated contact lenses. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, apparatus, article or uniform curing apparatus for light-regulated contact lenses including such element.

[0062] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A contact lens uniform curing device based on light regulation, comprising: A contact lens forming mold (100), wherein a reflective cup (200) and a light source array (300) are respectively arranged on the upper and lower sides of the contact lens forming mold (100); the reflective cup (200) is fixedly arranged below the contact lens forming mold (100), and a reflective light source (201) is fixedly arranged inside the reflective cup, and a reflective sheet (202) is arranged above the reflective light source (201) at intervals, and the reflective sheet (202) is arranged in a prism structure with a high-reflective film coated on the surface, so as to ensure that light can be efficiently reflected to the inner wall of the reflective cup (200). The light emitting surface of the reflective light source (201) is arranged at an inclined angle and / or in parallel with the inner wall of the reflective cup (200), so that the light is reflected once by the inner wall of the reflective cup (200) to form a collimated light beam that is vertically upward, and the collimated light beam forms an annular area on the outer ring of the contact lens forming mold (100) to supplement the curing light intensity at the edge position; the light source array (300) is fixedly arranged above the contact lens forming mold (100), and the light beam of the light source array (300) and the collimated light beam are arranged as mirror images of each other, and cooperate with the collimated light beam below to form a uniform light distribution.

2. The contact lens uniform curing device based on light regulation according to claim 1, characterized in that: The reflective sheet (202) is arranged in an arc-shaped structure, and its curvature is consistent with the curvature of the inner wall of the reflective cup (200).

3. The contact lens uniform curing device based on light regulation according to claim 1, characterized in that: A light shield (301) is provided outside the light source array (300), and the opening diameter of the light shield (301) and the opening diameter of the reflective cup (200) are both matched to the outer diameter of the contact lens forming mold (100), thereby forming a precise light channel.

4. The contact lens uniform curing device based on light regulation according to claim 1, characterized in that: A light-transmitting sheet (500) is arranged between the reflective cup (200) and the contact lens forming mold (100); The light-transmitting sheet (500) comprises: a base layer (501), an oxide layer (502) for isolating and protecting the bottom layer is provided on the base layer (501), a waveguide layer (503) is provided on the oxide layer (502), a refractive index matching layer (504) and an anti-reflection film layer (505) are sequentially stacked on the waveguide layer (503), and the refractive index of the refractive index matching layer (504) is between that of the waveguide layer (503) and the solidified material.

5. The contact lens uniform curing device based on light regulation according to claim 4, characterized in that: A hydrophobic fluorocarbon antifouling coating is arranged on the outermost layer of the light-transmitting sheet (500), and the thickness of the coating is controlled within the range of 50-80 nm.

6. The contact lens uniform curing device based on light regulation according to claim 5, characterized in that: The base layer (501) is composed of a composite film of silver nanowires and zinc oxide, wherein the diameter of the silver nanowires is controlled within the range of 20-40 nm and is embedded in the zinc oxide matrix in a three-dimensional network structure.

7. The contact lens uniform curing device based on light regulation according to claim 6, characterized in that: The molar ratio of the silver nanowires to zinc oxide is 1:8-1:

12.

8. The contact lens uniform curing device based on light regulation according to claim 7, characterized in that: The refractive index matching layer (504) is made of a composite of hydroxyethyl methacrylate and nano-cerium oxide, and its refractive index is adjusted to be between 1.52 and 1.68 through gradient control.

9. The contact lens uniform curing device based on light regulation according to claim 8, characterized in that: The refractive index matching layer (504) is arranged in a ridge-type structure and / or a wedge-type structure, and the length and width of each layer of the stepped structure in the refractive index matching layer (504) decrease layer by layer from top to bottom in a direction perpendicular to the upper surface of the substrate, forming a three-dimensional gradient refractive index distribution.

10. A method for uniformly curing contact lenses based on light regulation, comprising the following steps: The contact lens forming mold (100) is precisely suspended 15-20 mm above the reflective cup (200), ensuring that the relative positions of the mold, the reflective cup and the light source array are fixed to form a symmetrical illumination field; Placing the light-transmitting sheet (500) between the reflective cup (200) and the contact lens forming mold (100), and turning on the reflective light source (201) and the light source array (300) in the reflective cup (200); The curvature of the reflective sheet (202) and the tilt angle of the reflective light source (201) are adjusted so that the collimated light beam below and the light beam of the light source array (300) above are mirror images of each other, covering the upper and lower surfaces of the contact lens forming mold (100) to form a uniform illumination field; The photosensitive resin in the contact lens forming mold (100) is cured by using the uniform light field formed in the above steps; After curing is completed, the reflective light source (201) and the light source array (300) are turned off, and the inner and outer molds of the contact lens molding mold (100) are separated to take out the molded contact lens.

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