Many in the ad boasted so-called polarized sunglasses are essentially. Before buying, you can do a simple test to identify its authenticity. Find a reflective surface, and then took the Cheap Oakleys sunglasses, through a lens to observe this surface. Slowly rotate the sunglasses ninety degrees to observe the reflected glare is reduced or increased. If sunglasses are polarized sunglasses, then you will see significantly reduced glare. Foreground lens is a polarizing filter. The car engine hood can be polarized. Because of its polarization effect, when the lens rotates, it is almost completely filtered light from the car hood. When exposed to sunlight below, the color will darken sunglasses or prescription glasses are called color glasses. Color glasses from Corning, developed in the last century by Transitions promote the use of the company in the last century. Lenses mainly rely on the principle of special ultraviolet chemical reactions.
Lenses contain certain substances millions of molecules. When there is no ultraviolet radiation, visible light can penetrate these molecules, which is the visible part of the artificial light sources in general. However, when exposed to ultraviolet light in sunlight, these molecules would be through a chemical process, so that their shape changes. The new part of the molecular structure will absorb visible light, so that the darker lens. Change the shape of the number of molecules will change with changes in UV intensity. When you come indoors, leaving ultraviolet radiation will occur when the corresponding chemical inverse variation. Suddenly left ultraviolet radiation, these molecules will be quickly restored to the original structure, and thus lose the light absorption properties. Whether positive or inverse variation changes the speed of the entire process occurs very quickly. In the last century, the production of Corning Corporation Photo Brown and Photo Grey series, the lens is made of Cheap Oakleys glasses, the molecules evenly distributed throughout the lens. When prescription glasses when using this method, it brings the problem will become obvious, because different parts of prescription lens thickness may vary slightly thicker where the color will be even darker. However, with the growing popularity of plastic lenses, it has developed a new approach.
By the plastic lens immersed in a chemical bath, color molecules will be absorbed within the plastic lens. This new approach was superior to a simple coating process, in which the coating process, the color molecules only five microns thick, so it is not sufficient to make the lenses darken molecules. Currently, the leader in manufacturing photo chromic lenses Transitions has popularized this plastic lenses adsorption process. Reflective lens Cheap Oakleys sunglasses can be like a mirror as reflective. The lens is coated with very thin reflective coatings, as this layer is very thin coating, so it is called the half-silvered surface. The term comes from a half-silvered lens is sparse at the reflective elements, the number of the lens only about a transparent mirror half the number of molecules. At the molecular level, the reflective elements uniformly dispersed on the surface of the lens, form a uniform thin film, but only half the area of the lens is covered by the film. This half silvered surface can reach about half its surface reflection of light, and let the other half of the light directly through.