Contrast reduction atomization lens structure with polarization function and preparation method

Abstract

The invention discloses a contrast-reducing atomization lens structure with a polarization function and a manufacturing method thereof. The lens structure comprises a lens body, a polarization layer arranged in an optical area or on the surface of the lens and an atomization scattering structure embedded in the optical area of the lens. The polarization layer is used for filtering light in a specific polarization direction so as to reduce glare and improve visual comfort; the atomization scattering structure is composed of a plurality of nanoscale laser microdot arrays, each microdot does not generate effective diopter, incident light can be subjected to angle scattering, and the imaging contrast ratio is reduced. The polarized light layer and the atomization structure act synergistically and are used for simulating an outdoor-like low-contrast and glare-free visual state so as to restrain eye axis growth and prevent and control myopia development of children. The manufacturing method comprises the steps of lens base material preparation, polarizing film compounding, laser micro-point processing, protection treatment and the like. The pair of glasses is reasonable in structure and controllable in processing technology, has good visual comfort and prevention and control effects, and is suitable for children or teenagers to wear and use.

Description

Technical Field

[0001] This invention relates to a lens, specifically to a structure and preparation method of a contrast-reducing fogging lens with polarization function. Background Technology

[0002] In recent years, the incidence of myopia among adolescents has continued to rise, becoming a major concern in the global public health field. Numerous studies have shown that prolonged close-range visual use, lack of outdoor activities, and excessively high contrast in the visual environment are important contributing factors to axial elongation, which in turn leads to myopia. Therefore, optical intervention technologies focused on visual environment regulation are gradually becoming an important direction in the design of myopia control lenses.

[0003] Currently, some myopia control lens solutions employ laser microstructure intervention technology, embedding a large number of non-refractive micro-dots within the lens's optical area to scatter natural incident light, thus reducing the image contrast received by the retina and simulating the "low contrast state" created by multi-directional light source illumination in outdoor visual environments. This method is believed to help stimulate the accommodative reflex in the peripheral region of the retina, thereby generating signals to inhibit axial elongation. However, the "contrast reduction" achieved solely through micro-dot structures is still easily affected by glare in typical visual scenarios such as strong light, reflections, and backlighting, impacting the actual visual experience and control effectiveness.

[0004] On the other hand, polarized lenses, as mature optical products, possess excellent glare filtering capabilities and are widely used in outdoor activities, driving, and sports. By filtering out reflected light with a specific polarization direction, they can effectively reduce glare interference and improve visual clarity and comfort. However, polarized lenses themselves do not have a direct physiological function in myopia prevention and control; they are mainly used to enhance the visual experience.

[0005] Therefore, the existing myopia control lens technology still has the following shortcomings: (1) lack of systematic optimization of visual comfort under glare environment; (2) simply relying on micro-array structure to reduce contrast has limited effect in real life multi-scenario use and is difficult to form a more stable and effective visual stimulation signal; (3) the existing structure has failed to fully combine polarization technology and microstructure scattering mechanism, and has failed to build a composite visual control scheme with both comfort and intervention functions. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides a contrast-reducing fogging lens structure and preparation method with polarization function, aiming to simultaneously improve visual environment comfort, enhance wearing compliance, and simulate a real outdoor low-contrast, low-glare composite optical state, thereby more effectively inhibiting axial elongation in adolescents and achieving the goal of myopia prevention and control.

[0007] This invention is achieved through the following technical solution: a contrast-reducing fogging lens structure with polarization function, comprising: The lens body has an optical zone for viewing objects; A polarizing layer is disposed within the optical area or on the surface of the lens body to filter out light with a specific polarization direction, thereby reducing glare and improving visual comfort. A fogging scattering structure is embedded in the optical area of ​​the lens body. The fogging scattering structure is composed of multiple nanoscale laser micro-dot arrays. Each micro-dot does not produce effective refractive power and can produce weak angular scattering of incident light to reduce imaging contrast.

[0008] The polarizing layer, in combination with the atomizing scattering structure, provides an outdoor-like visual signal during normal wear and inhibits axial elongation.

[0009] As a preferred technical solution, the polarizing layer is a polarizing film layer made of PVA polarizing material and embedded in the middle layer of the lens body by hot pressing or composite method.

[0010] As a preferred technical solution, the laser micro-dot array of the atomized scattering structure is arranged in a quasi-regular or irregular random array, with the diameter of the laser micro-dots being 50-500 nanometers and the spacing being 1-20 micrometers, so as to achieve asymmetric scattering of natural light.

[0011] As a preferred technical solution, the lens body also includes an anti-ultraviolet layer to further enhance the eye protection effect when worn outdoors.

[0012] A method for manufacturing a contrast-reducing fogging lens with polarization function according to the present invention includes the following steps: S1) Provide a lens substrate, selecting a material with optometry properties as the lens body; S2) A functional structure for filtering out specific polarized light is formed on the surface or middle layer of the lens body composite polarizing film layer; S3) Using laser micromachining technology, nanoscale microdot array etching is performed in the optical area of ​​the lens body to form a fogging scattering structure for reducing contrast; S4) Perform surface protection treatment on the lens to complete the production of the finished lens.

[0013] As a preferred technical solution, in step S3, the processing of laser micro-dots is performed using picosecond or femtosecond laser equipment, and the laser power is adjusted within a range that prevents the material from scorching or deforming.

[0014] As a preferred technical solution, the polarizing film is laminated to the middle layer of the lens substrate by a hot-pressing process in step S2, and positioning and cutting are achieved simultaneously during the lamination process.

[0015] As a preferred technical solution, in step S1, the lens substrate can be a polymer material with a refractive index of 1.60 to 1.67, such as PC, TR90 or nylon, to meet the needs of children's lenses.

[0016] As a preferred technical solution, step S5 is also included, which involves setting micro-dots at the edge of the optical zone of the lens to distinguish the micro-dot array area from the clear viewing area, thereby facilitating the positioning of the processing area and product inspection.

[0017] The beneficial effects of this invention are: by embedding a polarizing layer in the lens, this invention can effectively filter out reflected glare from roads, water surfaces, glass and other directions, thereby improving visual comfort; by using a laser micro-array structure to scatter incident light at an angle, it can effectively reduce image clarity and contrast, simulate the visual blurring effect under outdoor multi-directional lighting, and provide the retina with intervention signals to inhibit axial elongation. The polarization function of this invention can significantly improve wearing comfort and reduce visual fatigue in outdoor strong light and high reflective environments; the micro-dot scattering structure continues to work in indoor learning, reading and other scenarios, maintaining low-contrast optical stimulation, effectively extending the application scenarios of the lens and improving actual prevention and control efficiency. The improved visual clarity and glare suppression provided by the polarizing layer of this invention make the lenses more comfortable to wear in daily life, which helps to increase the frequency and duration of children's voluntary wearing in outdoor and other environments, thereby enhancing the overall compliance with myopia prevention and control interventions. This invention combines polarizing film hot-pressing composite with laser micromachining technology, which allows for controllable manufacturing processes and precise adjustment of the size and arrangement of laser microdots. This facilitates industrial production and quality control without affecting the refractive performance and intensity of the lens itself. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the lens structure of the present invention. Detailed Implementation

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] like Figure 1 As shown, the present invention discloses a contrast-reducing atomized lens structure with polarization function and its manufacturing method. The aim is to achieve a simulated outdoor low-contrast, glare-free visual environment by integrating polarization function and atomization microstructure, thereby being used for daily prevention and intervention of myopia in children or adolescents, and improving the actual effect and compliance of lens wearing.

[0023] In a specific implementation, the lens structure of the present invention includes a lens body 1, which is a functional lens material with an optical zone for viewing objects. The optical zone is the visual field channel area corresponding to when the user wears glasses normally.

[0024] The lens body is made of optical resin material or optical polymer material, preferably a polymer material with good formability and impact resistance, such as polycarbonate (PC), nylon, or TR90 material. The refractive index of such materials is between 1.60 and 1.67, which is suitable for the optical design and actual processing of children's eyeglass lenses.

[0025] To enhance visual comfort in bright light and filter external glare, a polarizing layer is incorporated into the optical zone or surface of the lens body. This polarizing layer 3 is a polarizing film, preferably made of polyvinyl alcohol (PVA). The polarizing film is embedded into the middle layer of the lens body using a high-temperature hot-pressing process or a composite bonding process, making it an integral, non-removable part of the lens structure. During the hot-pressing process, the film is simultaneously cut and positioned to ensure that the polarization axis of the polarizing layer aligns with the lens's principal optical axis, guaranteeing stable polarization output.

[0026] To further simulate the low-contrast visual state under complex outdoor lighting conditions, a fogging scattering structure is also embedded in the optical area of ​​the lens body. This structure is formed by laser micromachining technology by etching on the surface or middle layer of the lens.

[0027] Specifically, the atomized scattering structure is composed of multiple nanoscale laser microdot arrays 2, with the diameter of each laser microdot controlled between 50 and 500 nanometers and the spacing between adjacent microdots controlled between 1 and 20 micrometers; These micro-dots can be arranged in a quasi-regular or irregular random pattern. By precisely controlling the laser energy, frequency, and scanning path, the resulting micro-dot array structure ensures that it does not affect the lens's refractive power while also disrupting the directionality of incident light to some extent. This causes the light to undergo weak angular scattering after passing through the lens, ultimately introducing a slight blurring effect in the retinal imaging area, thereby reducing image contrast and creating a "softened" visual effect. This dot array structure can continue to function during the wearer's daily eye use, simulating the scattering effect under natural light conditions in indoor learning environments, thus maintaining the regulatory signals for axial development.

[0028] The composite optical intervention structure formed by the superposition of the polarizing layer and the atomized micro-array structure can effectively eliminate strong glare caused by reflections from glass, water surfaces, etc. when children wear lenses, while maintaining a low-contrast visual environment similar to outdoors. This allows the retina to receive multi-directional, low-contrast, and softened visual stimulation, promoting the healthy development of the axial length of the eye.

[0029] In addition, to meet the protective performance needs of children during daily wear, an anti-ultraviolet coating can be applied to the surface of the lens. The coating can absorb or reflect ultraviolet rays with wavelengths between 280 and 400 nm, thereby providing more comprehensive optical protection for the wearer's eyes.

[0030] In the lens manufacturing process, the lens substrate is first pretreated by selecting polymer sheets or injection-molded blanks that meet the optical performance requirements, and then cutting them into lens blanks that conform to the size of children's glasses according to the set specifications. Subsequently, a polarizing film layer is embedded in the middle layer of the lens through a hot-pressing composite process. While ensuring the thermal stability and adhesion of the film layer, the composite temperature, pressure, and time are controlled to avoid the final image quality being affected by the stress deformation of the polarizing film.

[0031] Subsequently, picosecond or femtosecond laser processing equipment is used to perform an etching process on the surface or middle layer of the lens to create a nano-array. The laser power needs to be adjusted to a range that does not cause significant scorching or structural breakage of the material, and the micro-dot depth is preferably controlled in the range of tens to hundreds of nanometers. After processing, the lens is finally completed through ultrasonic cleaning, surface anti-scratch coating treatment, and UV protective coating treatment.

[0032] To facilitate subsequent quality control and identification, marking micro-dots are set at the edge of the optical area of ​​the lens. The size, shape, or distribution of these marking micro-dots are significantly different from the structure of the atomized micro-dot array, allowing for rapid identification by visual or optical instruments. This distinguishes the functional area of ​​the micro-dot array from the clear viewing area and also facilitates the location of the inspection area and the degree of processing during the later lens inspection process.

[0033] This invention not only structurally integrates polarization and micro-fogging functions, achieving a balance between visual experience and disease prevention intervention, but also ensures the reliability, stability, and reproducibility of the functional structure through process control. This lens structure is particularly suitable for children or adolescents in the rapid growth phase of their eye axis, and has promising market application prospects.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A contrast-reducing frosted lens structure with polarization function, characterized in that, include: The lens body has an optical zone for viewing objects; A polarizing layer is disposed within the optical area or on the surface of the lens body to filter out light with a specific polarization direction, thereby reducing glare and improving visual comfort. A fogging scattering structure is embedded in the optical area of ​​the lens body. The fogging scattering structure is composed of multiple nanoscale laser micro-dot arrays. Each micro-dot does not produce effective refractive power and can produce weak angular scattering of incident light to reduce imaging contrast.

2. The polarizing layer and the atomized scattering structure work together to provide outdoor-like visual signals during normal wear and to inhibit axial elongation.

3. The contrast-reducing fogging lens structure with polarization function according to claim 1, characterized in that: The polarizing layer is a polarizing film layer made of PVA polarizing material and embedded in the middle layer of the lens body by hot pressing or composite method.

4. The contrast-reducing fogging lens structure with polarization function according to claim 1, characterized in that: The laser micro-dot array of the atomized scattering structure is arranged in a quasi-regular or irregular random array, with the diameter of the laser micro-dots ranging from 50 to 500 nanometers and the spacing between them ranging from 1 to 20 micrometers, in order to achieve asymmetric scattering of natural light.

5. The contrast-reducing fogging lens structure with polarization function according to claim 1, characterized in that: The lens body also includes a UV protection layer to further enhance eye protection when worn outdoors.

6. A method for manufacturing a contrast-reducing, fogging lens with polarizing function, characterized in that, Includes the following steps: S1) Provide a lens substrate, selecting a material with optometry properties as the lens body; S2) A functional structure for filtering out specific polarized light is formed on the surface or middle layer of the lens body composite polarizing film layer; S3) Using laser micromachining technology, nanoscale microdot array etching is performed in the optical area of ​​the lens body to form a fogging scattering structure for reducing contrast; S4) Perform surface protection treatment on the lens to complete the production of the finished lens.

7. The contrast-reducing fogging lens structure with polarization function according to claim 5, characterized in that: In step S3, the processing of laser micro-dots is performed using picosecond or femtosecond laser equipment, and the laser power is adjusted within a range that prevents the material from scorching or deforming.

8. The contrast-reducing fogging lens structure with polarization function according to claim 5, characterized in that: In step S2, the polarizing film is laminated to the middle layer of the lens substrate through a hot-pressing process, and positioning and cutting are achieved simultaneously during the lamination process.

9. The contrast-reducing fogging lens structure with polarization function according to claim 5, characterized in that: In step S1, the lens substrate may be made of a polymer material with a refractive index of 1.60 to 1.67, such as PC, TR90 or nylon, to meet the needs of children's lenses.

10. The contrast-reducing fogging lens structure with polarization function according to claim 5, characterized in that: It also includes step S5, which sets micro-marking dots at the edge of the optical zone of the lens to distinguish the micro-dot array area from the clear viewing area, thereby facilitating the positioning of the processing area and product inspection.

Images