Views: 214 Author: Site Editor Publish Time: 2020-05-29 Origin: Site
Mirrored sunglasses are sunglasses with a reflective optical coating (called a mirror coating or flash coating) on the outside of the lenses to make them appear like small mirrors. it is also called a semi-silvered surface. The term "semi-silver plated" comes from the fact that the reflective molecules on the lens are very sparse, and the number is only about half the number of molecules that make the lens an opaque mirror. At the molecular level, reflective molecules are evenly dispersed on the surface of the lens to form a uniform film, but only half of the area of the lens is covered by the film. This half of the silver-plated surface can reflect about half of the light that reaches its surface, while letting the other half pass directly through.
Generally, the mirror coating is gradual, and the color depth of the coating gradually changes from top to bottom. This can strengthen the sunglasses' resistance to light from above, while allowing more light to enter from below and horizontally. This means that while you are driving, the sunglasses can block the sun's rays while still allowing you to see the dashboard clearly. Sometimes the paint is double-gradient with the highest color depth at the top and bottom of the lens, while the center of the lens is clear.
The key problem with reflective sunglasses is that the paint is easily scratched. Obviously, the sunglasses manufacturer has not been able to successfully apply an anti-scratch layer on the surface of the reflective film. Therefore, the scratch-resistant layer is coated on the surface of the lens, and the reflective film is coated on the scratch-resistant layer.
From the lens manufacturing process, mirror lenses sunglasses can not be regarded as a separate type, it’s only a vacuum coating method. However, due to the strong appearance of mirror sunglasses, here it will be described as a category. The mirror coating can be used dyed (tinted), polarized sunglasses and discolored sunglasses. The materials used are similar to AR anti-reflective coatings-use a gun in a vacuum furnace to heat coating materials of different refractive index. The lower evaporation deposits to the lens surface with a certain thickness. But different from AR coating, the mirror coating can greatly increase the reflectivity by changing the film thickness, thereby achieving the mirror reflection effect.
The mirror coating is usually combined with dyed sunglasses or polarized sunglasses, which is applied to the outer surface (convex surface) of the lens. The reduction in light transmittance makes it very suitable for all kinds of water, snow and high altitude environments, and also brings coolness to users wearing experience. Under the design of a certain mirror film layer, the darker the color of the lens base, the stronger the mirror effect. By adjusting the film design, it can also reflect different colors as needed to meet individual needs. In addition, the mirror coating can also be applied to large area facial protection products such as ski goggles.
There are so many different types of sunglasses, such as dyed (tinted) sunglasses, polarized sunglasses and discolored sunglasses, etc.. Which type will be fit for us
Dyed or injection molded tinted sunglasses: simple, easy to use and colorful.
Polarized sunglasses: The manufacturing without degrees is simple, the process with degrees is complicated, say no to lenses flare.
Photochromic sunglasses: color change added smart, it’s expensive but reasonable!
Mirror sunglasses: it’s the most dazzling among the sunglasses.