In an interview before the lens coating must be pre-cleaning, this cleaning requirement is very high, at the molecular level. Were placed in the cleaning tank of cleaning fluid, and the use of ultrasound to enhance the cleaning effect, when the lens after cleaning, into the vacuum chamber, in the process should pay special attention to avoid the air of dust and garbage and then adhered to the lens surface. The final cleaning is in a vacuum chamber, in the process should pay special attention to avoid the dust and garbage in the air and then adhered to the lens surface. Final cleaning is carried out before plating in a vacuum chamber, and placed in the vacuum chamber of the ion gun to bombard the surface of the lens (for example argon ion), complete the cleaning process after its road antireflection film coating.
Vacuum evaporation process to ensure the quality of the pure coating material coated on the surface of the lens, while the evaporation process, the chemical composition of the coating material can be tightly controlled. Vacuum evaporation process for the film thickness can be precisely controlled, precision. Of the glasses, the film is vital to the firm, is an important indicator of quality lenses. Lens quality indicators, including anti-wear lenses, zinc oxide anti-cultural centers, anti-temperature and so on. So now have a number of specific physical and chemical test methods, those wearing glasses in a simulated use conditions, the coating quality of the lens to film fastness test. These test methods include: salt water test, steam test, deionized water test, steel wool friction test, dissolution test, adhesion test, temperature test and humidity test, and so on.
There are multi-coated lens antireflection coating, the lens is particularly prone to stains, and stains will destroy the anti-reflection film antireflection effect. Under a microscope, we can find anti-reflection film was well-like structure, so the oil are particularly vulnerable to infiltration to antireflection coating. The solution is then coated on the antireflection film layer with anti-oil and water resistance of the apical membrane, nickel oxide and this must be very thin layer of film, so that it does not change the antireflection coating of optical performance.
Stain-resistant to fluoride-based membrane materials, there are two processing methods, one is soaking method, one is the vacuum coating, and the most common method is to vacuum coating. The most common method is to vacuum coating. When the anti-reflection film is completed, the evaporation process can be used in the fluoride-plated reflective membrane. Porous membrane fouling can be covered up anti-reflection film, and the ability to water and oil to reduce the contact area with the lens, so that oil and water droplets is not easy to adhere to the lens surface, also known as waterproof membrane.
For organic lenses, the ideal surface treatment system should include anti-wear film, barium titanate multilayer antireflection coating and the apical membrane fouling film composite membrane. Usually the most anti-wear coating film thickness of about 3-5mm, multi-layer antireflection coating thickness of about 0.3um, the top anti-fouling wax coating thinnest, about 0.005-0.01mm. Essilor of France's diamond crystal (crizal), composite film, for example, in the first lens on the film base coated with a wear-resistant silicone membrane; then use the IPC technology for ion bombardment before coating antireflection coating pre-cleaning; cleaned with high hardness zirconia (ZrO2) and other materials for the vacuum multi-layer anti-reflection coated film; finally coated with a contact angle of the top 110 films. Diamond crystal composite membrane technology that successful development of organic lens surface treatment technology has reached a new height. Source: