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13 Jul 2016

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Polarized sunglasses, like several excellent inventions, are utilised by a lot of of us with no a second thought. But did you ever quit to consider exactly where polarized sunglasses come from? Someone had to come up with them. 

In fact, we owe the creation of polarized sunglasses to 4 guys. Within the 1750s, James Ayscough experimented with utilizing tinted glass to appropriate vision problems.


Many scientists in the time were studying the properties of light and color. In 1808, Etienne-Louis Malus, a French physicist and mathematician, he found that light waves in the sun, which normally vibrate in all instructions, may be aligned into a single path when it truly is reflected off something, like water. In line with Malus' law, the intensity of light transmitted via a polarizing filter is determined by the angle in the filter in relation to the light.


Although Malus' law is essential inside the study of optics, it remained for Scottish physicist, astronomer and inventor Sir David Brewster to learn the angle at which light with a specific polarization can be transmitted by means of a surface with no reflection. This he did within the yr 1815. The angle, referred to as Brewster's angle or even the polarization angle), is crucial inside the invention of polarized sunglasses.


Throughout the 19th and early twentieth centuries, experiments ongoing. Men and women began using yellow- or brown-tinted sun shades to counteract light-weight sensitivity. People realized that color had something to complete with polarization. The optical business Bausch & Lomb started producing a dark green glass to protect U.S. Army Air Corps pilots from glare at high altitudes.


However, it wasn't until 1936 that Edwin H. Land, an American inventor, created polarizing light filter that was light and inexpensive enough to use on sun shades. He later created the Polaroid Corporation and developed many inventions, including the Land camera, which allowed amateur photographers to watch their pictures develop instantly.


Land's creation was quickly put to use in sunglasses produced by Ray-Ban, a unit of Bausch & Lomb. Ray-Ban also created the distinctive "aviator" frame that protected a pilot's eyes as he repeatedly glanced down at his instrument panel. Army pilots received these glasses for free and as their popularity grew, Ray Ban soon started to sell them for the public. The polarized sunglasses helped pilots to see and comprehensive their missions safely. Their ultra-cool and effective sunglasses added for the pilots' mystique and soon everyone wanted them in order to imitate their heroes.

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