Contact lens uniform curing device based on light regulation

Abstract

The utility model relates to a kind of contact lens uniform solidification device based on illumination regulation and control, comprising: contact lens forming mould, the upper and lower sides of the contact lens forming mould are respectively provided with light cup and light source array;The light cup is fixedly arranged below the contact lens forming mould, and reflection light source is fixedly arranged in its inside, reflection sheet is spaced apart and arranged above the reflection light source, the reflection sheet is arranged using the prism structure with high reflection film on surface, for ensuring that light can be efficiently reflected to the inner wall of light cup, the emitting surface of reflection light source and the inner wall of light cup are arranged with inclination angle and / or parallel, so that light forms vertical collimated light beam after once reflection by the inner wall of light cup, and the collimated light beam forms annular region at the outer ring of contact lens forming mould, and the solidification light intensity of edge position is made up;The light source array is fixedly arranged above the contact lens forming mould, the light beam of light source array and collimated light beam are mirror image arrangement, and cooperate with collimated light beam below to form uniform illumination distribution.

Description

Technical Field

[0001] This application relates to the field of contact lens manufacturing, and more particularly to a device for uniform curing of contact lenses based on light-controlled illumination. Background Technology

[0002] Currently, in the manufacturing process of contact lenses, adhesive is injected into the shell mold, the mold is closed, and the adhesive is cured by a UV lamp. Because the lens structure is spherical, the light source that can be received at the edge position is different from that at the center position, resulting in differences in curing and affecting the quality of the finished lens.

[0003] Chinese patent CN105328845A discloses a UV curing device for contact lenses, which includes a first reflector housing at least one ultraviolet lamp and a light shield 301, one side of which is disposed with one side of the ultraviolet lamp; a second reflector housing, the periphery of the side opening of which is tightly connected to the periphery of the side opening of the first reflector housing, and a light-transmitting tube disposed inside the second reflector housing; and an electric device having a rotating shaft and a gas pipeline disposed inside, one end of which is connected to one end of the light-transmitting tube, and the gas pipeline being connected to the light-transmitting tube.

[0004] The above solution uses a first reflector and a UV lamp in conjunction with a light shield to initially reflect and block light. However, in the actual contact lens curing process, although the light emitted by the UV lamp inside the first reflector is blocked by the light shield, reducing stray light interference, the reflection path of the light within the reflector is complex, making it difficult to ensure that the optical fiber uniformly covers the entire spherical lens. Especially in the edge areas, due to their tilt angle, less vertical light is received, resulting in slight differences in the angle of reception of the light source between the edge and center positions. This prevents the UV optical fiber from being evenly distributed on the lens surface, directly affecting the curing effect of the adhesive. For example, the edge areas may not cure completely due to insufficient light, while the center areas may over-cur or deform due to excessive light.

[0005] Therefore, we propose a device for uniform curing of contact lenses based on light-controlled illumination. Utility Model Content

[0006] The main objective of this application is to provide a light-controlled contact lens uniform curing device, which aims to solve the problem of uneven curing in the edge area of ​​spherical lenses in the prior art.

[0007] To achieve the above objectives, this application provides a contact lens uniform curing device based on light regulation, comprising: a contact lens molding mold, wherein a reflector cup and a light source array are respectively arranged on the upper and lower sides of the contact lens molding mold; the reflector cup is fixed below the contact lens molding mold and a reflective light source is fixed inside it, and a reflective sheet is arranged at intervals above the reflective light source. The reflective sheet adopts a prism structure with a high reflectivity film coated on its surface to ensure that light can be efficiently reflected to the inner wall of the reflector cup. The light-emitting surface of the reflective light source is inclined at an angle and / or parallel to the inner wall of the reflector cup, so that the light is reflected once by the inner wall of the reflector cup to form a vertically upward collimated beam, and the collimated beam forms a ring area on the outer edge of the contact lens molding mold to supplement the curing light intensity at the edge position; the light source array is fixed above the contact lens molding mold, and the beam of the light source array and the collimated beam are mirror images of each other, and cooperate with the collimated beam below it to form a uniform light distribution.

[0008] In one embodiment, the contact lens molding mold includes an outer mold and an inner mold, the outer mold and the inner mold being nested together, and the inner wall shape of the outer mold being adapted to the outer contour of the final formed contact lens, providing external shape constraints for the lens forming. The inner mold is located inside the outer mold, and its outer wall shape is adapted to the inner contour of the lens to be formed, with a gap between the inner wall of the inner mold and the outer wall of the outer mold for accommodating photosensitive resin.

[0009] In one embodiment, the contact lens molding die is suspended at a position of -mm directly above the reflector cup via a positioning mechanism.

[0010] In one embodiment, the reflector is configured with an arc-shaped structure, the curvature of which is consistent with the curvature of the inner wall of the reflector cup.

[0011] In one embodiment, a light shield is provided outside the light source array to shield external light from interfering with the curing process, ensuring that the light beam emitted by the light source array can be concentrated and effectively participate in the uniform curing of the contact lens molding mold.

[0012] In one embodiment, the opening diameter of the light shield and the opening diameter of the reflector are both adapted to the outer diameter of the contact lens molding mold, forming a precise light channel.

[0013] In one embodiment, the light shield adopts a double-layer light shield structure, wherein the outer layer of the light shield is made of light-absorbing material and the inner layer is made of high reflectivity material.

[0014] In one embodiment, a -mm air insulation layer is reserved between the outer and inner layers of the light shield.

[0015] In one embodiment, a light-transmitting sheet is provided between the reflector cup and the contact lens molding die.

[0016] In one embodiment, the light-transmitting sheet includes: a substrate layer, on which an oxide layer for isolating and protecting the underlying layer is disposed, a waveguide layer is disposed on the oxide layer, and a refractive index matching layer and an antireflection film layer are sequentially stacked above the waveguide layer, wherein the refractive index of the refractive index matching layer is between that of the waveguide layer and the curing material.

[0017] This utility model has the following technical effects:

[0018] By combining a reflective light source and a reflective sheet inside the reflector cup, and utilizing a high-reflectivity film with a prism structure, efficient reflection of light is ensured on the inner wall of the reflector cup. Simultaneously, the light-emitting surface of the reflective light source is set at a 90-degree angle to the inner wall of the reflector cup, allowing the light to form a vertically upward collimated beam after a single reflection. This improves light utilization and ensures the stability and directionality of the collimated beam. Furthermore, the light source array is fixed above the contact lens molding mold, and its beam is mirrored by the collimated beam below, ensuring that light evenly illuminates all parts of the contact lens molding mold, avoiding the uneven illumination problems that may occur in traditional curing processes.

[0019] Meanwhile, the reflector concentrates the light emitted from the light source onto the inner wall of the reflector cup, where it undergoes a single reflection to form a vertically upward collimated beam. Because the curvature of the reflector cup matches that of the inner wall, the light maintains higher directionality and consistency during reflection, avoiding light divergence caused by uneven surfaces or inaccurate angles.

[0020] The positioning mechanism suspends the contact lens molding mold 15-20mm directly above the reflector cup. This ensures that light can fully penetrate the photosensitive resin, promoting its rapid and uniform curing, while avoiding energy loss or uneven curing caused by excessive light penetration. Furthermore, it precisely coordinates with the collimated beam formed by the reflected light source inside the reflector cup to create a symmetrical and uniform illumination field that covers the entire contact lens molding mold, achieving uniform light distribution and efficient utilization. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a contact lens uniform curing device in one embodiment of this application;

[0022] Figure 2 This is an exploded view of the structure of a contact lens uniform curing device in one embodiment of this application;

[0023] Figure 3 This is an exploded view of the structure of the contact lens uniform curing device in another embodiment of this application;

[0024] Figure 4 This is an exploded view of the structure of the contact lens uniform curing device in another embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the light-transmitting sheet in one embodiment of this application.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] Furthermore, descriptions using terms such as "first" and "second" in this application are for descriptive purposes only (e.g., to distinguish identical or similar elements) and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, technical solutions from different embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, such a combination should be considered nonexistent and not within the scope of protection claimed in this application.

[0029] See Figures 1-2 This application provides a contact lens uniform curing device based on light regulation, including: a contact lens molding mold 100, the contact lens molding mold 100 is made of transparent photosensitive resin, and a reflector cup 200 and a light source array 300 are respectively provided on its upper and lower sides.

[0030] A reflector cup 200 is fixed below the contact lens molding mold 100, and a reflective light source 201 is fixed inside it. A reflective sheet 202 is spaced above the reflective light source 201. The reflective sheet 202 is a prism structure with a high reflective film coated on its surface to ensure that light can be efficiently reflected to the inner wall of the reflector cup 200. The light-emitting surface of the reflective light source 201 is inclined at an angle and / or parallel to the inner wall of the reflector cup 200, so that the light is reflected once by the inner wall of the reflector cup 200 to form a vertically upward collimated beam. The collimated beam forms a ring area on the outer edge of the contact lens molding mold 100 to supplement the curing light intensity at the edge. A light source array 300 is fixed above the contact lens molding mold 100. The beam of the light source array 300 is mirrored with the collimated beam and works with the collimated beam below it to form a uniform illumination distribution.

[0031] In this embodiment, the reflective light source 201 inside the reflector cup 200 is combined with the reflective sheet 202, and a high-reflectivity film with a prism structure is used to ensure efficient reflection of light on the inner wall of the reflector cup 200. Simultaneously, the light-emitting surface of the reflective light source 201 is set at a 45-degree angle to the inner wall of the reflector cup 200, so that the light forms a vertically upward collimated beam after one reflection, improving light utilization and ensuring the stability and directionality of the collimated beam. Furthermore, the light source array 300 is fixed above the contact lens molding mold 100, and its beam is mirrored with the collimated beam below, allowing light to evenly illuminate all parts of the contact lens molding mold 100, avoiding the uneven illumination problem that may occur during traditional curing processes.

[0032] On the other hand, through the coordinated work of the reflector cup 200 and the light source array 300, as well as the cooperation of the upper and lower beams, the light can penetrate the photosensitive resin evenly, 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.

[0033] Furthermore, the contact lens molding mold 100 includes an outer mold 101 and an inner mold 102. The outer mold 101 and the inner mold 102 are nested together, and the inner wall shape of the outer mold 101 is adapted to the outer contour of the final molded contact lens, providing external shape constraints 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. A gap is left between the inner wall of the inner mold 102 and the outer wall of the outer mold 101 to accommodate photosensitive resin.

[0034] The outer mold 101 is made of a highly transparent resin material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC), to ensure the light penetration during transmission, reduce energy loss during scanning, and provide stable external support for lens formation. The inner mold 102 is made of a transparent material with a refractive index similar to that of the photosensitive resin material, such as cyclic olefin 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 photocuring.

[0035] In one embodiment, the reflector 202 is configured with an arc shape, the curvature of which is consistent with the curvature of the inner wall of the reflector cup 200.

[0036] In this embodiment, the light emitted from the reflective light source 201 is reflected more concentratedly to the inner wall of the reflector cup 200 by the arc-shaped reflector 202, and then a collimated beam is formed vertically upward after a single reflection by the inner wall. Since the curvature of the reflector 202 is consistent with the inner wall of the reflector cup 200, the light can maintain a higher directionality and consistency during the reflection process, avoiding the problem of light divergence caused by uneven reflective surfaces or inaccurate angles.

[0037] In one embodiment, the contact lens molding die 100 is suspended 15-20 mm directly above the reflector cup 200 by a positioning mechanism 400.

[0038] In this embodiment, the contact lens molding mold 100 is suspended 15-20mm directly above the reflector cup 200 by the positioning mechanism 400. This ensures that light can fully penetrate the photosensitive resin, promoting its rapid and uniform curing, while avoiding energy loss or uneven curing caused by excessive light penetration. Furthermore, it can precisely cooperate with the collimated beam formed by the reflected light source 201 inside the reflector cup 200 to form a symmetrical and uniform illumination field that covers the entire contact lens molding mold 100, achieving uniform distribution and efficient utilization of light.

[0039] On the other hand, the positioning mechanism 400 can ensure that the contact lens molding mold 100 maintains a stable position and posture during the curing process, avoiding uneven lighting or curing defects caused by vibration or displacement. Furthermore, it can precisely adjust the distance between the mold and the reflector cup 200 according to different models of contact lens molding molds 100 or curing requirements, thereby further optimizing the lighting effect.

[0040] See Figure 3 In one embodiment, a light shield 301 is provided outside the light source array 300 to shield the interference of external light on the curing process, ensuring 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 molding mold 100.

[0041] Furthermore, the opening diameter of the light shield 301 and the opening diameter of the reflector cup 200 are both adapted to the outer diameter of the contact lens molding mold 100, forming a precise light channel.

[0042] In this embodiment, a closed light channel is formed by the opening diameter of the light shield 301 and the reflector cup 200 that matches the outer diameter of the contact lens molding mold 100. This ensures that the light beam emitted by the light source can completely cover the mold surface, avoiding light scattering or leakage, thereby improving the light energy utilization rate and avoiding the problems of "edge effect" or "center overexposure" in traditional curing processes.

[0043] In one embodiment, the light shield 301 adopts a double-layer light shield 301 structure.

[0044] Specifically, the outer layer of the light shield 301 is made of light-absorbing material, while the inner layer is made of high-reflectivity material. For example, the outer layer of the light shield 301 can be made of light-absorbing materials such as a matte black coating or light-absorbing velvet, which can effectively absorb external stray light and reduce interference caused by internal light reflection; the inner layer is made of polished aluminum plate, silver-plated reflective film, or high-reflectivity microstructure material, so that light can achieve efficient directional reflection within the shield. Furthermore, the double-layer structure of the light shield 301 can be connected by a snap-fit ​​nesting, and a 1-2mm air insulation layer is reserved between the outer and inner layers to ensure structural stability and avoid heat conduction loss.

[0045] In this embodiment, the synergistic effect of the outer light-absorbing material and the inner high-reflectivity material enhances the light management capabilities of the light shield 301. The outer light-absorbing material precisely absorbs stray light from all directions, blocking out all external light that could interfere with the curing process, creating a highly pure "dark room" atmosphere for curing. Meanwhile, the inner high-reflectivity material efficiently and directionally reflects the light beam emitted by the light source array 300, allowing the light to propagate along a predetermined path within the shield and accurately focus on the surface of the contact lens molding mold 100. This precise light projection ensures that every area of ​​the mold surface receives uniform and sufficient illumination, significantly improving the uniformity and consistency of curing.

[0046] See Figures 4-5 In one embodiment, a light-transmitting sheet 500 is provided between the reflector cup 200 and the contact lens molding die 100.

[0047] The light-transmitting sheet 500 includes: a substrate layer 501, an oxide layer 502 for isolating and protecting the underlying layer on the substrate layer 501, a waveguide layer 503 on the oxide layer 502, and a refractive index matching layer 504 and an antireflection film layer 505 stacked sequentially on the waveguide layer 503. The refractive index of the refractive index matching layer 504 is between that of the waveguide layer 503 and the cured material.

[0048] In this embodiment, an oxide layer 502 is provided on the base layer 501 of the light-transmitting sheet 500 to isolate and protect the underlying oxide layer 502, preventing external impurities, moisture, etc., from eroding and interfering with the oxide layer 502, ensuring the stability and integrity of the oxide layer 502, and thus guaranteeing the performance and service life of the entire light-transmitting sheet 500. Simultaneously, the waveguide layer 503 guides and transmits light along a specific path, allowing the light to propagate orderly within the light-transmitting sheet 500. Furthermore, the refractive index matching layer 504 positioned above the waveguide layer 503 effectively reduces the refractive index difference between the waveguide layer 503 and the cured material, reducing light reflection loss at the interface and allowing more light to smoothly enter the cured material from the waveguide layer 503, thus improving the utilization rate of light energy.

[0049] On the other hand, the antireflective coating 505 can increase the light transmittance by reducing the reflection of light on the surface of the light-transmitting film 500, so that light can pass through the light-transmitting film 500 more efficiently and reach the interior of the contact lens molding mold 100.

[0050] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or light-controlled contact lens homogenizing device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, apparatus, article, or light-controlled contact lens homogenizing device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or light-controlled contact lens homogenizing device that includes that element.

[0051] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

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

2. The contact lens uniform curing device based on light-controlled illumination according to claim 1, characterized in that, The contact lens molding mold (100) includes an outer mold (101) and an inner mold (102). The outer mold (101) and the inner mold (102) are nested together. The inner wall shape of the outer mold (101) is adapted to the outer contour of the final formed contact lens, providing external shape constraints for the lens forming. The inner mold (102) is located inside the outer mold (101). Its outer wall shape is adapted to the inner contour of the lens to be formed. A gap is left between the inner wall of the inner mold (102) and the outer wall of the outer mold (101) to accommodate photosensitive resin.

3. The contact lens uniform curing device based on light-controlled illumination according to claim 2, characterized in that, The contact lens molding die (100) is suspended 15-20mm directly above the reflector cup (200) by a positioning mechanism (400).

4. The contact lens uniform curing device based on light-controlled illumination according to claim 1, characterized in that, The reflector (202) is designed with an arc shape, and its curvature is consistent with the curvature of the inner wall of the reflector cup (200).

5. The contact lens uniform curing device based on light-controlled illumination according to claim 1, characterized in that, The light source array (300) is provided with a light shield (301) to shield the external light from interfering with the curing process, so as to 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 molding mold (100).

6. The contact lens uniform curing device based on light-controlled illumination according to claim 5, characterized in that, The opening diameter of the light shield (301) and the opening diameter of the reflector (200) are both adapted to the outer diameter of the contact lens molding mold (100) to form a precise light channel.

7. The contact lens uniform curing device based on light-controlled illumination according to claim 6, characterized in that, The light shield (301) adopts a double-layer light shield (301) structure. The outer layer of the light shield (301) is made of light-absorbing material, and the inner layer is made of high reflectivity material.

8. The contact lens uniform curing device based on light-controlled illumination according to claim 7, characterized in that, A 1-2mm air insulation layer is reserved between the outer and inner layers of the light shield (301).

9. The contact lens uniform curing device based on light-controlled illumination according to claim 1, characterized in that, A light-transmitting sheet (500) is provided between the reflector cup (200) and the contact lens molding mold (100).

10. The contact lens uniform curing device based on light-controlled illumination according to claim 9, characterized in that, The light-transmitting sheet (500) includes: a substrate layer (501), on which an oxide layer (502) for isolating and protecting the underlying layer is provided, a waveguide layer (503) is provided on the oxide layer (502), and a refractive index matching layer (504) and an antireflection film layer (505) are sequentially stacked on top of the waveguide layer (503), wherein the refractive index of the refractive index matching layer (504) is between that of the waveguide layer (503) and the curing material.

Images