High-refractive-index anti-blue-light polarized lens and processing technology thereof

Abstract

The invention discloses a high-refractive-index anti-blue-light polarized lens which comprises a high-refractive-index resin matrix, the high-refractive-index resin matrix is formed by blending and curing 85% of polycarbonate derivatives and 15% of nano-zirconia filler, and the polycarbonate derivatives contain sulfur aromatic monomers; the polarizing film is embedded in the middle layer of the high-refractive-index resin matrix and is a diaphragm with a parallel structure formed by an aluminum oxide array at an interval of 0.1 mu m; the hardening layer is dip-coated on the surface of the high-refractive-index resin matrix; the silicon dioxide layer is sputtered on the surface of the hardening layer; the blue light interference preventing film is plated on the surface of the nanoscale hafnium oxide-titanium composite coating; and the hydrophobic film is sprayed and cured on the surface of the blue light interference prevention film. According to the invention, the ultralight polycarbonate derivative is used as a substrate material, and the impact resistance is improved through a molecular crosslinking technology; meanwhile, the nanoscale hafnium oxide-titanium composite coating is adopted, the refractive index can reach 1.74-1.80 and is 30% thinner than that of a traditional resin lens, and the edge thickness is reduced by 40%.

Description

Technical Field

[0001] The present invention belongs to the technical field of lenses, and specifically relates to a high refractive index blue light blocking polarizing lens and its processing technology. Background Art

[0002] When sunlight projects onto the road surface or water surface, it directly stimulates the eyes, making the eyes feel dazzled, fatigued, and unable to view objects persistently. Especially when driving a car or engaging in outdoor entertainment activities, it not only affects our work and entertainment mood, but even affects our judgment of images and causes danger; long-term exposure to direct sunlight will also lead to a rapid decline in vision, resulting in myopia, hyperopia, astigmatism, or cataracts, etc. A polarizing lens is a lens that only allows light of a specific polarization direction in natural light to pass through. Due to its light filtering effect, things look darker when wearing it, and it is suitable for use during outdoor sports. Polarized resin lenses can be processed into different diopters, suitable for users with myopia or presbyopia. The currently commonly used resin lens with a refractive index of 1.499 as the resin layer of the polarized resin lens has a relatively low refractive index.

[0003] In this regard, it is particularly important to design a new type of polarizing lens with a refractive index up to 1.74 - 1.80, which is 30% thinner than the traditional resin lens (1.50) and has a 40% reduction in the edge thickness. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a high refractive index blue light blocking polarizing lens and its processing technology to avoid the trouble of the relatively low refractive index and relatively thick thickness of the conventional polarized resin lens.

[0005] To solve the above technical problem, the present invention discloses a high refractive index blue light blocking polarizing lens, which includes: A high refractive index resin matrix, which is formed by blending and curing 85% of polycarbonate derivatives and 15% of nano-zirconia fillers, wherein the polycarbonate derivatives contain sulfur-containing aromatic monomers; A polarizing film embedded in the middle layer of the high refractive index resin matrix, and the polarizing film is a film with a parallel structure formed by an alumina array with a spacing of 0.1 μm; A hardening layer dip-coated on the surface of the high refractive index resin matrix; A silica layer and a nano hafnium-titanium composite coating sputtered on the surface of the hardening layer; A blue light blocking interference film plated on the surface of the nano hafnium-titanium composite coating; and A hydrophobic film spray-cured on the surface of the blue light blocking interference film.

[0006] The present invention also discloses a processing technology of a high refractive index blue light blocking polarizing lens, including: Step a. Provide 85 parts of a polycarbonate derivative containing a sulfur-containing aromatic monomer and 15 parts of nano-zirconia filler, and through melt blending, injection molding and curing to form a substrate with a refractive index of 1.60 - 1.65; Step b. Treat the cured substrate with a sodium hydroxide solvent, and then perform ultrasonic cleaning; Step c. Dry the cleaned substrate, send it into a hardening tank for hardening, and form a hardening layer; Step d. After hardening, perform ultrasonic cleaning again and dry it. The dried substrate is treated by plasma to increase surface activity, and then sent into a coating machine for magnetron sputtering. First deposit a silica transition layer with a thickness of 10 - 20 nm to improve the adhesion of the subsequent coating; then use an Hf-Ti alloy target, where Hf:Ti is 7:3, the reaction gas is high-purity oxygen, the pressure is 0.3 - 0.5 Pa, and the pulsed sputtering frequency is 10 kHz to form a nano-scale hafnium-titanium composite coating; Step e. Cut the polarizing film into the shape of a lens blank, use a microscopic alignment system to mark the direction of the polarization axis, laser-etch a reference mark on the edge of the polarizing film to match the positioning hole of the lens mold, and use the vacuum lamination method to bond the polarizing film between the upper substrate and the lower substrate with UV glue; coat a polyurethane sealant to prevent water vapor from invading the polarization; Step f. Clean the resin matrix of the composite polarizing film and send it into a coating machine to deposit an anti-blue light interference film; Step g. Spin-coat a hydrophobic film on the coated lens, take it out, clean it and dry it for inspection.

[0007] According to an embodiment of the present invention, the anti-blue light interference film includes alternately arranged titanium dioxide film layers and silica film layers, and each has 5 layers.

[0008] According to an embodiment of the present invention, the hydrophobic film is made of a fluorine-containing silicon material.

[0009] According to an embodiment of the present invention, the sputtering parameters in step d are: vacuum degree: 5×10⁻ 6 Torr; working gas pressure: 0.4 Pa, Ar:O2 = 4:1; power: DC 250W; substrate temperature: 100 °C.

[0010] According to an embodiment of the present invention, the nano-scale hafnium-titanium composite coating adopts a 6-layer gradient design, with a single layer thickness of 50 - 100 nm and a total thickness of 300 nm.

[0011] According to an embodiment of the present invention, after step e, the lens is annealed at a temperature of 120 °C in an N2 atmosphere for 1 hour to eliminate the residual stress of lamination.

[0012] Compared with the prior art, the present invention can achieve the following technical effects: Using an ultra-light polycarbonate derivative as the base material, the impact resistance is improved through molecular cross-linking technology; at the same time, a nanoscale hafnium-titanium oxide composite coating is adopted, with a refractive index of 1.74-1.80, which is 30% thinner than traditional resin lenses (1.50), and the edge thickness is reduced by 40%.

[0013] The multi-layer interference filter film enables the lens to prevent blue light.

[0014] Of course, it is not necessary for any product implementing the present invention to achieve all of the above technical effects simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of a high refractive index blue light blocking polarizing lens according to an embodiment of the present invention. REFERENCE SIGNS

[0016] High refractive index resin matrix 10, polarizing film 20, hardening layer 30, silica layer 40, nanoscale hafnium-titanium oxide composite coating 50, blue light blocking interference film 60, hydrophobic film 70. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will describe in detail the embodiments of the present invention in conjunction with the drawings and embodiments, so as to fully understand how the present invention applies technical means to solve technical problems and achieve the realization process of technical effects and implement accordingly.

[0018] Please refer to Figure 1 , Figure 1 It is a schematic diagram of a high refractive index blue light blocking polarizing lens according to an embodiment of the present invention.

[0019] As shown in the figure, a high refractive index blue light blocking polarizing lens includes: a high refractive index resin matrix 10, which is formed by blending and curing 85% of a polycarbonate derivative and 15% of nano-zirconia filler, wherein the polycarbonate derivative contains a sulfur-containing aromatic monomer; a polarizing film 20 embedded in the middle layer of the high refractive index resin matrix 10; a hardening layer 30 dip-coated on the surface of the high refractive index resin matrix 10; a silica layer 40 and a nanoscale hafnium-titanium oxide composite coating 50 sputtered on the surface of the hardening layer 30; a blue light blocking interference film 60 plated on the surface of the nanoscale hafnium-titanium oxide composite coating 50; and a hydrophobic film 70 spray-cured on the surface of the blue light blocking interference film 60.

[0020] In an embodiment of the present invention, an ultra-light polycarbonate derivative is used as the base material, and the impact resistance is improved through molecular cross-linking technology. Sulfur-containing aromatic monomers are used to improve the heat resistance of the base. Nano-zirconia fillers account for 15% to increase the refractive index, thereby forming a high-refractive-index resin matrix 10 for standby. The polarizing film 20 is a film with a parallel structure formed by an alumina array with a pitch of 0.1 μm, having a high polarization effect. The hardening layer 30 improves the hardness of the lens. The silica layer 40 and the nano-scale hafnium-titanium composite coating 50 increase the refractive index of the lens. The anti-blue light interference film 60 improves the anti-blue light effect. The hydrophobic film 70 improves the hydrophobicity of the lens surface.

[0021] The present invention also discloses a processing technology for a high-refractive-index anti-blue light polarizing lens, including: Step a. Provide 85 parts of a polycarbonate derivative containing sulfur-containing aromatic monomers and 15 parts of nano-zirconia fillers, and through melt blending, injection molding and curing to form a substrate with a refractive index of 1.60 - 1.65. Step b. Treat the cured substrate with a sodium hydroxide solvent and then perform ultrasonic cleaning. Step c. The cleaned substrate is dried and then sent to a hardening tank for hardening to form a hardening layer. Step d. After hardening, it is ultrasonically cleaned and dried again. The dried substrate is treated by plasma to increase surface activity, and then sent to a coating machine for magnetron sputtering. First, deposit a silica transition layer with a thickness of 10 - 20 nm to improve the adhesion of the subsequent coating. Then, use an Hf-Ti alloy target, where Hf:Ti is 7:3, the reaction gas is high-purity oxygen, the pressure is 0.3 - 0.5 Pa, and the pulse sputtering frequency is 10 kHz to form a nano-scale hafnium-titanium composite coating. The sputtering parameters are: vacuum degree: 5×10⁻ 6 Torr; working gas pressure: 0.4 Pa, Ar:O2 = 4:1; power: DC 250W; substrate temperature: 100°C.

[0022] Step e. Cut the polarizing film into the shape of a lens blank, use a microscopic alignment system to mark the direction of the polarization axis, laser etch a reference mark on the edge of the polarizing film to match the positioning hole of the lens mold, and use the vacuum lamination method to bond the polarizing film between the upper substrate and the lower substrate with UV glue; coat polyurethane sealant to prevent water vapor from invading the polarization; perform annealing treatment on the lens at a temperature of 120°C in an N2 atmosphere for 1 hour to eliminate the residual stress of lamination.

[0023] Step f. Clean the resin matrix of the composite polarizing film and then send it to a coating machine to deposit an anti-blue light interference film. Step g. Spin-coat a hydrophobic film on the coated lens, take it out, clean it, dry it and send it for inspection.

[0024] Preferably, the blue light interference prevention film comprises alternately arranged titanium dioxide film layers and silicon dioxide film layers, with 5 layers of each. The hydrophobic film is made of fluorosilicon material.

[0025] The nano hafnium-titanium composite coating of the present invention adopts a 6-layer gradient design, with a single layer thickness of 50-100 nm and a total thickness of 300 nm. The HfO layer and the TiO2 layer are alternately deposited to form a refractive index gradient structure (gradually changing from 1.74 to 1.80) to reduce interface reflection.

[0026] Using the above method, the refractive index of the lens is measured to be 1.78; the Abbe number is 40; the light transmittance is >92% for visible light, >95% for blue light blocking, the polarization efficiency is 99.2%@550 nm; the ultraviolet protection reaches UV400 (100% blocking of UVA / UVB); the specific gravity is 1.25 g / cm³ (20% lighter than traditional ones).

[0027] In summary, the present invention uses an ultra-light polycarbonate derivative as the base material, improves the impact resistance through molecular cross-linking technology; at the same time, adopts a nano hafnium-titanium composite coating, with a refractive index of 1.74-1.80, 30% thinner than traditional resin lenses (1.50), and the edge thickness is reduced by 40%.

[0028] The above description shows and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A high refractive index blue light blocking polarized lens, characterized in that: include: A high-refractive-index resin matrix, wherein the high-refractive-index resin matrix is ​​formed by blending and curing 85% of a polycarbonate derivative and 15% of a nano-zirconia filler, wherein the polycarbonate derivative contains a sulfur-containing aromatic monomer; A polarizing film embedded in the middle layer of the high refractive index resin matrix, wherein the polarizing film is a film sheet with a parallel structure formed by an aluminum oxide array with a spacing of 0.1 μm; A hardening layer dip-coated on the surface of the high refractive index resin matrix; A silicon dioxide layer and a nano-scale hafnium oxide-titanium composite coating sputtered on the surface of the hardened layer; an anti-blue light interference film coated on the surface of the nano-scale hafnium oxide-titanium composite coating; and A hydrophobic film is sprayed and cured on the surface of the anti-blue light interference film.

2. A processing technology for high refractive index blue light blocking polarized lenses as claimed in claim 1, characterized in that: include: Step a. providing 85 parts of a polycarbonate derivative of a sulfur-containing aromatic monomer and 15 parts of a nano-zirconia filler, melt blending, and injection molding to form a substrate having a refractive index of 1.60-1.65; Step b. The cured substrate is treated with a sodium hydroxide solvent and then ultrasonically cleaned; Step c. The cleaned substrate is dried and sent to a hardening tank for hardening to form a hardened layer; Step d. After hardening, the substrate is ultrasonically cleaned and dried again. After drying, the substrate is plasma treated to increase surface activity and then sent to a coating machine for magnetron sputtering. A silicon dioxide transition layer with a thickness of 10-20 nm is first deposited to enhance the adhesion of subsequent coatings. Then, a Hf-Ti alloy target is used, wherein the Hf:Ti ratio is 7:3, the reaction gas is high-purity oxygen, the pressure is 0.3-0.5 Pa, and the pulse sputtering frequency is 10 kHz to form a nano-scale hafnium oxide-titanium composite coating; Step e. Cut the polarizing film into the shape of the lens blank, use a microscopic alignment system to mark the direction of the polarization axis, laser etch a reference mark on the edge of the polarizing film to match the lens mold positioning hole, use a vacuum lamination method, and use UV glue to bond the polarizing film between the upper substrate and the lower substrate; apply polyurethane sealant to prevent water vapor from invading the polarization; Step f. After cleaning the resin matrix of the composite polarizing film, feed it into a coating machine to coat the anti-blue light interference film; Step g. Spin-coat the hydrophobic film on the coated lens, remove it, clean it, dry it and send it for inspection.

3. The processing technology of the high refractive index anti-blue light polarized lens according to claim 2, characterized in that: The anti-blue light interference film includes titanium dioxide film layers and silicon dioxide film layers that are alternately arranged, and each of the two film layers has 5 layers.

4. The processing technology of the high refractive index anti-blue light polarized lens according to claim 2, characterized in that: The hydrophobic membrane is configured as a fluorine-containing silicon material.

5. The processing technology of the high refractive index anti-blue light polarized lens according to claim 2, characterized in that: The sputtering parameters in step d are vacuum degree: 5×10⁻ 6 Torr; working gas pressure: 0.4 Pa, Ar:O2=4:1; power: DC 250W; substrate temperature: 100℃.

6. The processing technology of the high refractive index anti-blue light polarized lens according to claim 2, characterized in that: The nano-scale hafnium oxide-titanium composite coating adopts a 6-layer gradient design, with a single layer of 50-100nm and a total thickness of 300nm.

7. The processing technology of the high refractive index blue light blocking polarized lens according to claim 2, characterized in that: After step e, the lens is annealed at 120° C. in a N 2 atmosphere for 1 hour to eliminate residual stress of the lamination.

Images