CN101776776A - Color-separating spectacle lens and preparation method thereof - Google Patents

Abstract

The invention discloses a dichroic spectacle lens and a preparation method thereof. The method of the present invention comprises the steps of: coating the optical film material on the surface of the lens to form a dichroic optical lens with an optical film; the optical film is an anti-reflection optical film or an anti-reflection optical film; the requirements for the anti-reflection optical film are as follows: Optical thickness nh=(2k-1)×λ/4, and 1<n<n1, the number of film layers is a single layer; the requirements of anti-reflection optical film are as follows: the optical thickness of the film layer nh=(2k-1)×λ/ 4, and n>1, and n>n1, the number of film layers is arbitrary; n is the refractive index of the optical film, h is the thickness of the optical film, k is any positive integer, λ is the wavelength of the target light, and n1 is the spectacle lens refractive index. The method of the invention can realize the control of the light passing through the dichroic spectacle lens, so that the passing light has a certain wavelength and a certain intensity, and achieves the purpose of protecting human eyes, which cannot be achieved by all optical filter spectacle lenses in clinical and daily life.

Description

Dichroic spectacle lens and preparation method thereof

technical field

The invention relates to a dichroic spectacle lens and a preparation method thereof.

Background technique

Optical thin films such as anti-reflection coatings, high-reflection coatings, spectroscopic coatings, filter coatings, polarizing or depolarizing coatings, etc. are optical devices designed on the basis of light interference. Optical thin films have been widely used in optical instruments, communications, construction, medical treatment, space technology and other fields, and the continuous development of new processes, new materials, and new technologies make them have very broad application prospects.

Optical films are divided into reflective films, anti-reflective films, filter films, optical protective films, polarizing films, spectroscopic films and phase films according to their applications. The first four are commonly used. Optical reflective film is used to increase specular reflectivity, and is often used to manufacture reflective, refractive and resonant cavity devices. Optical anti-reflection coatings are deposited on the surface of optical components to reduce surface reflection and increase optical system transmission, also known as anti-reflection coatings. Optical dichroic coatings are used for spectral or other optical division, and there are many types and complex structures. Optical protective film is deposited on the surface of metal or other soft erodible materials or films to increase its strength or stability and improve optical properties.

Generally, common lenses are divided into substrate (uncoated lens, used for dyeing, very wear-resistant), hard film (silicide film, transparent and colorless, difficult to distinguish), green film (fluoride, increase light transmission) properties), purple film (metal ion film, which takes into account both light transmission and shielding of medium and high frequency radiation, and the film itself has conductivity and shielding functions). As long as it is a lens with a color film, the light transmittance can reach more than 97%. Adding hard coating is mainly used for customers who work in a bad environment and have poor self-care. The lens is not easy to scratch and has a relatively long life. However, the light transmittance is only 88%, and the lens is more likely to reflect light in an environment with a large difference in light. (It is reflected in the fact that the user can see the objects behind from the inside of the lens, and the surface will be reflective when taking pictures).

Today's glasses coating technology is a new technology of using optical thin film and vacuum to coat a layer of material on the surface of the lens to improve the ability of the lens to reflect light and enhance or reduce the transmission of light. There are two kinds of coated lenses: (1) reflective dichroic lens: the surface of the lens is plated with gold, silver, zinc sulfide, etc., the coating can reflect visible light, infrared rays and Y rays, and protect the eyes; (2) anti-reflection lens , the lens is coated with magnesium fluoride, silicon dioxide, aluminum fluoride, etc., which can reduce specular reflection and improve the filter of the lens. The coating also makes the color balance of the image different. In addition, the coating can delay the aging and discoloration of the lens.

Today's glasses coating technology and glasses formed by processing have no objective theoretical basis, so there is no definite target for the spectral range and light transmittance of reflected and transmitted light. They are only processed blindly according to the requirements of aesthetics and beauty. The selection is to select the light through the physical characteristics of the coating material itself.

Contents of the invention

The object of the present invention is to provide a dichroic lens and a preparation method thereof.

The preparation method of dichroic spectacle lens provided by the invention comprises the following steps:

Utilize the conventional physical or chemical method to plate the optical film material on the surface of the spectacle lens to make a spectacle lens with an optical film, that is, a dichroic spectacle lens; the optical film is an anti-reflection optical film or an anti-reflection optical film;

Wherein the requirements of the antireflection optical film are as follows: the optical thickness of the film layer nh=(2k-1)×λ/4, and 1<n<n1; wherein, n is the refractive index of the optical film, h is the thickness of the optical film, k is any positive integer, λ is the wavelength of the target light, n1 is the refractive index of the spectacle lens; the number of film layers is a single layer;

Among them, the requirements of the anti-reflection optical film are as follows: the optical thickness of the film layer nh=(2k-1)×λ/4, and n>1, and n>n1; wherein, n is the refractive index of the optical film, and h is the optical film thickness, k is any positive integer, λ is the wavelength of the target light, n1 is the refractive index of the spectacle lens; the number of film layers is any number of layers.

Spectacle lenses with anti-reflection optical films are light-transmitting lenses. Spectacle lenses with enhanced reflection optical films are filter spectacle lenses.

The wavelength of the target light determines the thickness of the optical film. The target light refers to seven kinds of visible light, namely red light, orange light, yellow light, green light, blue light, blue light and purple light. The wavelength ranges of the seven visible lights are as follows: purple light λ=397-424nm, blue light λ=424-455nm, blue light λ=455-492nm, green light λ=492-575nm, yellow light λ=575-585nm, orange light λ =585-647nm, red light λ=647-723nm. The choice of target light is determined by the patient's light requirements. For example, blue light is related to age-related macular degeneration. For patients with age-related macular degeneration, you can choose blue light enhanced reflection film glasses to filter out blue light. Green light is related to the damage of visual receptor cells. For patients with visual receptor cell diseases, you can choose green light enhancement film glasses to filter out green light. If low-vision patients are sensitive to green light, they can choose green light anti-reflection coating spectacle lenses, and if they are sensitive to red light, they can choose red light anti-reflection coating spectacle lenses.

The dichroic spectacle lens of the present invention can completely filter out the blue light that damages retinal RPE cells, and is helpful to patients with age-related macular degeneration. At the same time, by controlling the thickness and number of layers of the film, it is possible to control the light passing through the dichroic spectacle lens, so that the passing light has a certain wavelength and a certain intensity, which is currently impossible for all dichroic spectacle lenses in clinical practice.

The optical thin film material is required to have good transparency, optical properties, stability, and a certain bonding force with the surface of the spectacle lens material. At present, a variety of inorganic and organic materials have the above characteristics and can be used as one of the optical thin film materials.

The present invention adopts conventional physical or chemical method to plate optical film material on the surface of spectacle lens, can refer to document (Tang Weizhong. Thin film material preparation principle, technology and application. Metallurgical Industry Press, second edition in January, 2003; Zheng Weitao etc. Thin film material and thin film technology. Chemical Industry Press, on January 1st, 2004) described coating method, also can carry out coating with reference to following physical or chemical method:

1. Physical method: The technology is mature, and there is no restriction on deposition materials and substrate materials, but the equipment is more complicated, and the price is higher than that of chemical reactions.

1. Vacuum evaporation: It only needs to generate a vacuum environment. In a vacuum environment, it is the most widely used technology at present to provide enough heat to the evaporated material to obtain enough heat to obtain the vapor pressure necessary for evaporation. It is simple and convenient. The operation is easy, the film forming speed is fast, and the efficiency is high, but the bonding between the formed film and the substrate is poor, and the process repeatability is not good.

2. Sputtering: At a certain temperature, if a solid or liquid is bombarded by appropriate high-energy particles (usually ions), the atoms in the solid or liquid may obtain enough energy to escape from the surface through collisions. The way atoms are emitted from a surface is called sputtering. It developed late, but it has been widely used in modern times. Advantages: any material to be plated that can be made into a target can be sputtered; the film obtained by sputtering is well bonded to the substrate; the film obtained by sputtering has high purity and good compactness; the process is repeatable, The film thickness can be controlled, and at the same time, a film with uniform thickness can be obtained on a large-area substrate. However, the deposition rate is low, and the temperature of the substrate rises due to the irradiation of the plasma.

3. Ion beam and ion assistance: the membrane material is ionized, and the membrane material ions with high energy are introduced into the vacuum area and decelerated before reaching the substrate to achieve low-energy direct deposition. Combining the advantages of vacuum evaporation and sputtering and overcoming their shortcomings, the evaporation deposition speed is fast, the film obtained by evaporation is well combined with the substrate, and the thickness is uniform.

4. Epitaxial film deposition technology: Epitaxy refers to the method of growing the same substance on the substrate with orientation or single crystal when there is a crystallographic relationship between the deposited film and the substrate. Membrane purity, membrane integrity, and doping levels can be well controlled.

2. Chemical method: The technology is mature. The thin film material is realized by the chemical reaction of the reactive gas. The chemical reaction can be caused by the thermal effect or the electric separation of ions. However, there are certain limitations on the selection of reactants and products, and the control of the deposition process is more complicated and difficult; at the same time, the chemical reaction requires a higher reaction temperature, and the ambient temperature of the substrate is generally higher, which limits the substrate. Material selection.

1. Thermal growth: Under gas-filled conditions, a large number of oxide, nitride and carbide films can be obtained by heating the substrate. This is not a common technique, but research on thermal growth of metal and semiconductor oxides is extensive.

2. Chemical vapor deposition: an important and commonly used method for preparing various thin film materials, which can prepare elemental and compound thin films on various substrates. The advantage is that the composition of the film and the doping level can be accurately controlled so that the composition has an ideal stoichiometric ratio; coatings can be deposited on substrates with complex shapes; expensive vacuum equipment is not required; high deposition temperatures will greatly improve crystallization integrity ; It can be done on a large area or on multiple substrates. The disadvantage is that high temperature is required; the reaction gas will react with the substrate or equipment; the equipment may be more complicated, and there are many control variables.

3. Electroplating: The process in which a chemical reaction is generated by the flow of electric current through the conductive solution (electrolyte), and finally a certain substance is deposited on the cathode (electrolysis). The focus is on cathodic reactions, which are only suitable for depositing metals and alloys on conductive substrates.

4. Electroless plating: It is a method to achieve film deposition directly through chemical reaction without any electric field. The catalytic reaction using active agent can also be regarded as electroless plating. It does not require high temperature and is economical.

5. Anode reaction deposition method: Contrary to electroplating, the oxide grows on the surface of the anode, and an amorphous continuous film can be obtained.

6. LB technology: the process of forming a condensed film on the gas-liquid interface by using molecular activity, and stacking the film on the substrate to form a film, which is mostly used in electronic and solar energy conversion systems.

Available coating materials (purity: 99.9%-99.9999%) are listed below:

1. High-purity oxides:

Silicon monoxide (SiO), hafnium dioxide (HfO ₂ ), hafnium diboride, hafnium oxychloride, zirconium dioxide (ZrO ₂ ), titanium dioxide (TiO ₂ ), titanium monoxide (TiO), silicon dioxide (SiO ₂ ), titanium trioxide (Ti ₂ O ₃ ), titanium pentoxide (Ti ₃ O ₅ ), tantalum pentoxide (Ta ₂ O ₅ ), niobium pentoxide (Nb ₂ O ₅ ), Aluminum (Al ₂ O ₃ ), scandium trioxide (Sc ₂ O ₃ ), indium trioxide (In ₂ O ₃ ), praseodymium dititanate (Pr(TiO ₃ ) ₂ ), cerium oxide (CeO ₂ ) , magnesium oxide (MgO), tungsten trioxide (WO ₃ ), samarium oxide (Sm ₂ O ₃ ), neodymium oxide (Nd ₂ O ₃ ), bismuth oxide (Bi ₂ O ₃ ), praseodymium oxide (Pr ₆ O ₁₁ ) , antimony oxide (Sb ₂ O ₃ ), vanadium oxide (V ₂ O ₅ ), nickel oxide (NiO), zinc oxide (ZnO), iron oxide (Fe ₂ O ₃ ), chromium oxide (Cr ₂ O ₃ ), oxide Copper (CuO), etc.

2. High-purity fluoride:

Magnesium fluoride (MgF ₂ ), ytterbium fluoride (YbF ₃ ), yttrium fluoride (LaF ₃ ), dysprosium fluoride (DyF ₃ ), neodymium fluoride (NdF ₃ ), erbium fluoride (ErF ₃ ), fluoride Potassium (KF), strontium fluoride (SrF ₃ ), samarium fluoride (SmF ₃ ), sodium fluoride (NaF), barium fluoride (BaF ₂ ), cerium fluoride (CeF ₃ ), lead fluoride, etc.

3. Mixture:

Zirconia titania mixture, zirconia tantalum oxide mixture, titania tantalum oxide mixture, zirconia yttrium oxide mixture, titania niobium oxide mixture, zirconia alumina mixture, magnesia alumina mixture, oxide Indium tin oxide mixture, tin oxide indium oxide mixture, cerium fluoride calcium fluoride mixture and other mixtures.

4. High-purity metals:

High-purity aluminum, high-purity aluminum wire, high-purity aluminum grain, high-purity aluminum sheet, high-purity aluminum column, high-purity chromium grain, high-purity chromium powder, chromium bar, high-purity gold wire, high-purity gold sheet, high-purity gold, high-purity gold grain, high-purity silver wire , high-purity silver particles, high-purity silver, high-purity silver sheet, high-purity platinum wire, high-purity hafnium powder, high-purity hafnium wire, high-purity hafnium grains, high-purity tungsten grains, high-purity molybdenum grains, high-purity monocrystalline silicon, high-purity polycrystalline silicon, high-purity Pure germanium grains, high-purity manganese grains, high-purity cobalt, high-purity cobalt grains, high-purity molybdenum, high-purity molybdenum flakes, high-purity niobium, high-purity tin grains, high-purity tin wire, high-purity tungsten grains, high-purity zinc grains, high-purity Vanadium pellets, high-purity iron pellets, high-purity iron powder, sea surface titanium, high-purity zirconium wire, high-purity zirconium, zirconium sponge, zirconium iodide, high-purity zirconium pellets, high-purity zirconium block, high-purity tellurium pellets, high-purity germanium pellets, high-purity Titanium sheet, high-purity titanium particles, high-purity nickel, high-purity nickel wire, high-purity nickel sheet, high-purity nickel column, high-purity tantalum sheet, high-purity tantalum, high-purity tantalum wire, high-purity tantalum grain, high-purity nickel-chromium wire, high-purity nickel-chromium grain, high-purity lanthanum, High-purity praseodymium, high-purity gadolinium, high-purity cerium, high-purity terbium, high-purity holmium, high-purity yttrium, high-purity ytterbium, high-purity thulium, high-purity rhenium, high-purity rhodium, high-purity palladium, high-purity iridium, etc.

5. Organic materials:

Polymethyl methacrylate (PMMA, poly(methyl methacrylate)), silicone gel, hydrogel, acrylate-acrylate polymer, polycarbonate, other materials such as memory materials, etc.

6. Other compounds:

Barium titanate (BaTiO ₃ ), praseodymium titanate (PrTiO ₃ ), strontium titanate (SrTiO ₃ ), lanthanum titanate (LaTiO ₃ ), zinc sulfide (ZnS), cryolite (Na ₃ AlF ₆ ), zinc selenide (ZnSe), cadmium sulfide, etc.

7. Accessories:

Molybdenum sheet, molybdenum boat, tantalum sheet, tungsten sheet, tungsten boat, tungsten strand.

Available sputtering targets (purity: 99.9%-99.999%) are listed below:

1. Metal target:

Nickel target (Ni), titanium target (Ti), zinc target (Zn), chromium target (Cr), magnesium target (Mg), niobium target (Nb), tin target (Sn), aluminum target (Al), indium target (In), iron target (Fe), zirconium aluminum target (ZrAl), titanium aluminum target (TiAl), zirconium target (Zr), aluminum silicon target (AlSi), silicon target (Si), copper target (Cu), tantalum Target (Ta), germanium target (Ge), silver target (Ag), cobalt target (Co), gold target (Au), gadolinium target (Gd), lanthanum target (La), yttrium target (Y), cerium target ( Ce), stainless steel target, nickel-chromium target (NiCr), hafnium target (Hf), molybdenum target (Mo), iron-nickel target (FeNi), tungsten target (W), etc.

2. Ceramic target

ITO target, magnesium oxide target, iron oxide target, silicon nitride target, silicon carbide target, titanium nitride target, chromium oxide target, zinc oxide target, zinc sulfide target, silicon dioxide target, silicon monoxide target, cerium oxide target , zirconia target, niobium pentoxide target, titanium dioxide target, zirconia target, hafnium dioxide target, titanium diboride target, zirconium diboride target, tungsten trioxide target, aluminum oxide pentoxide target Ditantalum, niobium pentoxide target, magnesium fluoride target, yttrium fluoride target, zinc selenide target, aluminum nitride target, silicon nitride target, boron nitride target, titanium nitride target, silicon carbide target, niobic acid Lithium target, praseodymium titanate target, barium titanate target, lanthanum titanate target, nickel oxide target, sputtering target, etc.

The method provided by the invention can realize the control of the light passing through the dichroic spectacle lens, so that the passing light has a certain wavelength and a certain intensity, so as to achieve the real purpose of protecting the human eye. Can't do it.

Detailed ways

The following examples facilitate a better understanding of the present invention, but do not limit the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the following examples, unless otherwise specified, were purchased from conventional biochemical reagent stores.

Embodiment 1, the preparation of optical filter lens

Spectacle lenses: resin lenses of styrene-propylene diglycol carbonate copolymer (purchased from Beijing Optical City, Ogilvy brand), its refractive index is 1.562. Coating material: polycarbonate with a refractive index of about 1.60 as the high film, choose nh=(2k-1)×110nm as the optical thickness of the high film; PMMA with a refractive index of 1.491 as the low refractive index material.

High-film and low-film interval coatings are used to form multiple anti-reflection surfaces, which are coated with 10 layers and 20 layers of optical films respectively; after testing, the anti-reflection film spectacle lens with 10 layers of coating reduces the transmittance of blue light by 35%, and the coating is 20 layers The anti-reflective coating eyeglass lens reduces the transmission rate of blue light by 90%.

Embodiment 2, the preparation of transparent spectacle lens

Spectacle lenses: JD resin resin lenses (purchased from Beijing Optical City, Ogilvy brand), with a refractive index of 1.60. Coating material: silicon dioxide with a refractive index of about 1.544 is selected as the coating material, and the optical thickness of the film is nh=(2k-1)×170nm.

A single-layer film with a lower refractive index than the lens body is coated on the lens by sputtering; after testing, the prepared anti-reflection coated spectacle lens has a transmittance of red light exceeding 95%.

Claims (7)

1. a method for preparing color-separating spectacle lens comprises the steps:

The optical thin film material is plated in the surface of lens, makes lens, i.e. color separation optical glasses sheet with optical thin film; Described optical thin film is anti-reflection optical thin film or increases reflective film;

Wherein anti-reflection optical thin film require as follows: optical thickness nh=(2k-1) * λ/4 of rete, and 1＜n＜n1; Wherein, n is the refractive index of optical thin film, and h is the thickness of optical thin film, and k is any positive integer, and λ is the target light wavelength, and n1 is the refractive index of lens; The rete number is an individual layer;

Wherein increase reflective film require as follows: optical thickness nh=(2k-1) * λ/4 of rete, and n＞1, and n＞n1; Wherein, n is the refractive index of optical thin film, and h is the thickness of optical thin film, and k is any positive integer, and λ is the target light wavelength, and n1 is the refractive index of lens; The rete number is any number of plies.

2. method according to claim 1 is characterized in that: described optical thin film material is an organism.

3. method as claimed in claim 2 is characterized in that: described organism is polymethylmethacrylate, silicon gel, hydrogel, acrylate, polycarbonate or memory body.

4. method according to claim 1 is characterized in that: described optical thin film material is an inorganics.

5. method as claimed in claim 4 is characterized in that: described inorganics is diamond like carbon or silicon dioxide.

6. according to arbitrary described method in the claim 1 to 5, it is characterized in that: target light described to be filtered is ruddiness, orange light, gold-tinted, green glow, blue or green light, blue light or purple light.

7. the color-separating spectacle lens that arbitrary described method prepares in the claim 1 to 6.