Eye protection lens, and method for manufacturing the same

Abstract

This application discloses a protective eyeglass lens and a method for preparing the lens. The preparation method includes the following steps: 100) Immersing the eyeglass lens in a solution containing a blue light absorber and a UV absorber to provide blue light and UV protection; 200) Optical coating treatment of the eyeglass lens: Six layers of optical film of varying thickness are designed on both the concave and convex surfaces of the lens, with a light transmission wavelength range of 630-750 nm. The protective eyeglass lens of this application provides blue light and UV protection, effectively preventing light damage to the eyes.

Description

Specification 1 A Lens for Eye Protection and a Method for Preparing the Lens for Eye Protection Technical Field This application belongs to the technical field of eye protection lenses, specifically relating to a lens for eye protection and a method for preparing the lens for eye protection. Background Art Eyeglasses are products composed of lenses and frames, used to improve vision, protect the eyes, or for decorative purposes. Lenses are one of the important components of eyeglasses. Current lens technologies mainly include: 1. Sunglasses that block the intensity of sunlight, preventing ultraviolet radiation damage to the eyes and thus providing eye protection; 2. Blue light blocking glasses that prevent blue light from damaging the eyes, thus providing eye protection. However, as the duration of wearing glasses increases, the degree of myopia tends to increase, and the above-mentioned existing technologies have not truly solved the visual health problem. Summary of the Invention The purpose of this application is to provide a lens for eye protection and a method for preparing the lens for eye protection, to solve the above-mentioned problems existing in the prior art. To achieve the above objectives, this application adopts the following technical solution: On one hand, this application provides a method for preparing protective eyeglass lenses, including the following manufacturing steps: 100) Immersion method for treating eyeglass lenses to prevent blue light and ultraviolet radiation: Immersing the eyeglass lenses in a mixed solution containing a blue light absorber and an ultraviolet absorber to complete the treatment of the eyeglass lenses to prevent blue light and ultraviolet radiation; wherein, the ultraviolet absorber includes methacrylate and styrene in a mass ratio of 13:37 (HK 30134885 A Specification 2); 200) Optical coating treatment of eyeglass lenses: Designing 6 layers of optical film layers with different thicknesses stacked layer by layer on the concave and convex surfaces of the eyeglass lenses to complete the coating treatment of the eyeglass lenses, so that the transmittance of the coated eyeglass lenses is ≥96% and the light transmission wavelength range is 630-750nm. In a preferred embodiment of this application, the mass ratio of blue light absorber to ultraviolet absorber in the mixed solution is 1:1. When immersing the spectacle lenses, the temperature of the mixed solution is 30-50 degrees Celsius, and the immersion time is 30-45 minutes. In another preferred embodiment of this application, the specific operation for optical coating treatment of the spectacle lenses is as follows: The spectacle lenses are cleaned with ultrasonic waves and dried in an oven for 3.5-4.5 hours. The dried spectacle lenses are the spectacle lenses to be coated. The spectacle lenses to be coated are placed in a coating fixture and then sent into a coating furnace. The coating environment is vacuumed to 2.0*10⁻⁵ TOOR. The spectacle lenses to be coated are first subjected to ion cleaning for 3-5 minutes, and then the coating begins. Six layers of optical film with different thicknesses are designed on both the concave and convex surfaces of the spectacle lenses, stacked sequentially, so that the transmittance of the coated spectacle lenses is ≥96%, and the light transmission wavelength range is 630-750nm.As a preferred technical solution in this application, the spectacle lenses are hardened before optical coating treatment. The specific operation is as follows: The spectacle lenses are immersed in a solvent containing a hardening solution, and then dried in an oven at 90-110 degrees Celsius for 4-5 hours. The coating thickness of the hardening layer on both the concave and convex surfaces of the spectacle lenses is 3-5 μm. As another preferred technical solution in this application, six sequentially stacked optical film layers of varying thicknesses are designed on both the concave and convex surfaces of the spectacle lenses. The total thickness of the six optical film layers is 161 nm - 205 nm. HK 30134885 A Specification 3 As a preferred technical solution of this application, the six optical film layers include: a first optical film layer with a thickness of 20nm-30nm, made of silicon monoxide; a second optical film layer with a thickness of 8nm-10nm, made of titanium pentoxide; a third optical film layer with a thickness of 8nm-10nm, made of silicon dioxide; a fourth optical film layer with a thickness of 50nm-65nm, made of titanium pentoxide; a fifth optical film layer with a thickness of 60nm-70nm, made of silicon dioxide; and a sixth optical film layer with a thickness of 15nm-20nm, made of an AF layer. On the other hand, this application also provides a protective eyeglass lens, which is prepared by the preparation method described in any of the above claims. Beneficial effects: The protective lenses prepared by the method of this application, and the glasses equipped with the protective lenses, have excellent blue light and ultraviolet protection effects, effectively preventing light damage to the eyes and reducing the stimulation of the eyes by the reflection on the surface of the eyeglass lenses, effectively relieving eye fatigue; it can also improve the transmittance of the eyeglass lenses, and the prepared protective lenses can achieve a high transmittance of 96% or more, making the eyes see things more clearly, more easily, and more eye-friendly; the light transmission wavelength range of the lenses of this application is 630-750nm. When the retinal cells of the eye are stimulated by low-energy red light with a wavelength of 630-750nm, the retinal cells will be activated and photobiological reactions will be generated, enhancing the dilation of retinal, scleral, and choroidal blood vessels and thickening of blood vessel walls, shortening the axial length of the eye, improving uncorrected visual acuity, accelerating blood circulation, and making vision healthier. Detailed Description of Embodiments To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the present application will be briefly described below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is merely some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand this application, but does not constitute a limitation of this application.Example: This example provides a method for preparing protective eyeglass lenses, including the following steps: 100) Treating eyeglass lenses for blue light and ultraviolet protection using an immersion method: Immersing the eyeglass lenses in a mixed solution containing a blue light absorber and an ultraviolet absorber to complete the blue light and ultraviolet protection treatment; wherein, the ultraviolet absorber includes methacrylate and styrene in a mass ratio of 13:37; the mass ratio of the blue light absorber to the ultraviolet absorber in the mixed solution is 1:1, the temperature of the mixed solution is 30-50 degrees Celsius when immersing the eyeglass lenses, and the immersion time is 30-45 minutes. The eyeglass lenses treated by immersion have good functions of absorbing ultraviolet light (300-400nm) and blue light (380nm-440nm). 150) Before optical coating treatment, the spectacle lenses undergo a hardening process, specifically as follows: Immerse the spectacle lenses (commonly those with a refractive index of 1.5 and 1.69) in a solvent containing a hardening solution, then bake them in an oven at 90-110 degrees Celsius (e.g., 90, 100, or 110 degrees Celsius, adjusted according to actual conditions) for 4-5 hours (e.g., 4 hours, 4.5 hours, or 5 hours, adjusted according to actual conditions). This temperature and time result in optimal hardening. If these conditions are not met, the surface hardness of the spectacle lenses will not be sufficient; if they are exceeded, the surface hardness will be too high and brittle, and the hardening layer on the lens surface will easily crack. The coating thickness of the hardening layer on both the concave and convex surfaces of the spectacle lenses should be 3-5 μm (e.g., 3 μm, 4 μm, or 5 μm, adjusted according to actual conditions).200) Optical coating treatment of eyeglass lenses using vapor deposition: HK 30134885 A Instruction Manual 5. Before vapor deposition, clean the eyeglass lenses ultrasonically and dry them in an oven for 3.5-4.5 hours (e.g., 3.5 hours, 4 hours, or 4.5 hours, adjust according to actual conditions within this range). The dried eyeglass lenses are the lenses to be coated. Under these baking conditions, the moisture within the lens material can be fully dried, resulting in the most stable bonding between the coating layer and the lens. Insufficient or excessive baking time will affect the stability of the bonding between the coating layer and the lens. Before starting the coating process, load the eyeglass lenses to be coated into the coating fixture and then into the coating furnace. The coating environment is vacuumed to 2.0*10⁻⁵ TOOR. First, perform ion cleaning on the eyeglass lenses to be coated to enhance the adhesion of the coating layer. Then begin the coating process, designing 6 [units] on both the concave and convex surfaces of the eyeglass lenses. The optical film layers are stacked one after another with varying thicknesses. These optical films allow light to pass through the lens in the wavelength range of 630-750nm. After coating, the surface reflection of the eyeglass lens is reduced by 70-80%, and the transmittance of the eyeglass lens is increased by 2-3% on one side. Only when the thickness of the optical film layer is designed to be 6 layers can the effect of reducing reflectivity and transmitting transmittance after coating be achieved. Too few or too many film layers will affect the reflectivity and transmittance effect. Specifically, six optical film layers of varying thicknesses are designed on both the concave and convex surfaces of the eyeglass lens, stacked sequentially. The total thickness of the six optical film layers is 161nm-205nm. These six optical film layers include: a first optical film layer with a thickness of 20nm-30nm, made of silicon monoxide; a second optical film layer with a thickness of 8nm-10nm, made of titanium pentoxide; a third optical film layer with a thickness of 8nm-10nm, made of silicon dioxide; a fourth optical film layer with a thickness of 50nm-65nm, made of titanium pentoxide; a fifth optical film layer with a thickness of 60nm-70nm, made of silicon dioxide; and a sixth optical film layer with a thickness of 15nm-20nm, made of an AF layer (Anti-fingerprint, a vacuum coating for preventing fingerprints), which improves the surface's resistance to dirt and grime. This embodiment provides a protective eyeglass lens, which is prepared by the method described in the above embodiment (HK 30134885 A Specification 6).The protective lenses and glasses equipped with these lenses, prepared by the method described in this application, have excellent blue light and ultraviolet light protection effects. They effectively prevent light damage to the eyes and reduce the irritation caused by reflections from the lens surface, thus effectively relieving eye fatigue. Furthermore, they improve lens transmittance, achieving a transmittance of 96% or higher, making vision clearer, easier, and more eye-friendly. The light transmission wavelength range of the lenses in this application is 630–750 nm. When retinal cells are stimulated by low-energy red light with a wavelength of 630–750 nm, they activate and produce photobiological reactions, enhancing vasodilation and thickening of the retinal, scleral, and choroidal vessels, shortening the axial length of the eye, improving uncorrected visual acuity, and accelerating blood circulation, resulting in healthier vision. Finally, it should be noted that the above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the scope of protection of this application. HK 30134885 A Claim 1 1. A method for preparing a protective eyeglass lens, characterized by comprising the following steps: 100) Immersion treatment of the eyeglass lens for blue light and ultraviolet protection: The eyeglass lens is immersed in a mixed solution containing a blue light absorber and an ultraviolet absorber to complete the blue light and ultraviolet protection treatment of the eyeglass lens; wherein, the ultraviolet absorber comprises methacrylate and styrene in a mass ratio of 13:37; 200) Optical coating treatment of the eyeglass lens: Six layers of optical film with different thicknesses are designed on both the concave and convex surfaces of the eyeglass lens to complete the coating treatment of the eyeglass lens, so that the transmittance of the coated eyeglass lens is ≥96% and the light transmission wavelength range is 630-750nm. 2. The method for preparing eyeglass lenses according to claim 1, characterized in that the mass ratio of blue light absorber and ultraviolet absorber in the mixed solution is 1:1, and the temperature of the mixed solution is 30-50 degrees Celsius and the soaking time is 30-45 minutes when immersing the eyeglass lenses.3. The method for preparing a protective eyeglass lens according to claim 1, characterized in that the specific operation of optical coating treatment on the eyeglass lens is as follows: the eyeglass lens is cleaned with ultrasonic waves, placed in an oven to dry for 3.5-4.5 hours, and the dried eyeglass lens is the eyeglass lens to be coated; the eyeglass lens to be coated is placed into a coating fixture, and then sent into a coating furnace. The coating environment is vacuumed to 2.0*10-5 TOOR. The eyeglass lens to be coated is first subjected to ion cleaning for 3-5 minutes, and then the coating is started. Six layers of optical film with different thicknesses are designed on both the concave and convex surfaces of the eyeglass lens, so that the transmittance of the coated eyeglass lens is ≥96% and the light transmission wavelength range is 630-750nm. 4. A method for preparing a protective eyeglass lens according to claim 3, characterized in that, before the optical coating treatment of the eyeglass lens, the eyeglass lens is subjected to a hardening treatment, specifically as follows: HK 30134885 A Claim 2: The eyeglass lens is immersed in a solvent containing a hardening liquid, and then dried in an oven at 90-110 degrees Celsius for 4-5 hours, with the coating thickness of the hardening layer on the concave and convex surfaces of the eyeglass lens being 3-5 μm. 5. A method for preparing a protective eyeglass lens according to any one of claims 1-4, characterized in that, six layers of optical film with different thicknesses are designed on both the concave and convex surfaces of the eyeglass lens, with the total thickness of the six optical film layers being 161 nm-205 nm. 6. A method for preparing a protective eyeglass lens according to claim 5, characterized in that the six optical film layers comprise: a first optical film layer with a thickness of 20nm-30nm, made of silicon monoxide; a second optical film layer with a thickness of 8nm-10nm, made of titanium pentoxide; a third optical film layer with a thickness of 8nm-10nm, made of silicon dioxide; a fourth optical film layer with a thickness of 50nm-65nm, made of titanium pentoxide; a fifth optical film layer with a thickness of 60nm-70nm, made of silicon dioxide; and a sixth optical film layer with a thickness of 15nm-20nm, made of an AF layer. 7. A protective eyeglass lens, characterized in that the protective eyeglass lens is prepared by the method according to any one of claims 1-6. HK 30134885 A.