Reflective sunglasses, the key problem is that the paint is easy to be scratched. Obviously, now Ray Ban Wayfarer sunglasses manufacturers have not been able to successfully scratch-resistant layer in the reflective film is deposited on the surface. Thus, the scratch layer is coated on the surface of the lens, the reflection film is coated with scratch-resistant layer.
Anti-scratch protection layer
The glass is a natural anti-scratch, but the vast majority of plastics are not. To solve this problem, manufacturers developed a series of methods, the surface plating layer of the lens is transparent and solid film. Such films are composed of diamond-like carbon film and polycrystalline diamond sintered material. Through the ionization process, a layer of thin but very resistant thin film formed on the surface of the lens.
Anti-reflective coating
Ray ban wayfarers Sunglasses, a common problem is the emergence of glare, back to the glare produced by the light shines on the back of the lens, and reflected to your eyes. The role of anti-reflective protective coating is to reduce the lens the light of this reflection.
With scratch-resistant protective layer anti-reflective coating layer on the lenses is very strong, thin film. The anti-reflective coating material the refractive index between air and ray ban outlet sunglass. This makes the film surface and the outer surface of the reflected light intensity is almost equal. When the thickness of the film is about a quarter of the wavelength of light, the light reflected from the film inside and outside surface will cancel each other out through destructive interference, so as to minimize the glare you see. The anti-reflective coating is also applied to the front surface of the refractive contact lenses and sunglasses, to eliminate the lens reflection light generated by the "hot spots".
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