Mirrored sunglasses are also known as ‘cop-shades’ because their popularity with US police officers. The most popular design of mirrored sunglasses is the Aviator style. However, in the late nineties, iconic films such as The Matrix, helped popularize this type of sunglasses in the cyberpunk subculture. You may remember that most characters in The Matrix franchise would appear in the film donning mirrored sunglasses.
One of the greatest appeals of this particular type of shades is the fact that it is almost impossible for anyone to see the eyes through the film layer. Hence, it becomes very difficult to detect the other person’s emotions and full facial expression. This adds an aura of mystery to someone wearing mirrored sunglasses.
Most recently, festival goers around the world – specially women – were seen sporting mirrored sunglasses. Also, the wraparound version of mirrored sunglasses is very popular in the world of extreme sports.
The mirror coating in its earlier versions was achieved through a single layer of a deposited thin film of a suitable metal prepared by ion beam, sputter or vapor deposition. More modern versions of the process usually have several alternating layers of dielectric (electrical insulator) materials or sometimes metals such as nickel, titanium or chromium.
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