Polarized sunglasses, like a lot of wonderful inventions, are utilized by many of us without a 2nd thought. But did you ever stop to consider where polarized sunglasses come from? Somebody had to come up with them.
Really, we owe the creation of polarized sunglasses to 4 men. Within the 1750s, James Ayscough experimented with making use of tinted glass to appropriate vision problems.
Numerous scientists in the time had been studying the properties of light and color. In 1808, Etienne-Louis Malus, a French physicist and mathematician, he discovered that light waves in the sun, which usually vibrate in all directions, could be aligned into one particular direction when it truly is reflected off one thing, like water. According to Malus' law, the intensity of light transmitted by means of a polarizing filter depends on the angle on the filter in relation towards the light.
While Malus' law is very important inside the research of optics, it remained for Scottish physicist, astronomer and inventor Sir David Brewster to find out the angle at which light having a certain polarization may be transmitted through a surface without reflection. This he did in the 12 months 1815. The angle, known as Brewster's angle or even the polarization angle), is essential within the invention of polarized sunglasses.
Throughout the 19th and early twentieth generations, experiments continued. Men and women started making use of yellow- or brown-tinted sun shades to counteract gentle sensitivity. Folks recognized that color experienced some thing to do with polarization. The optical company Bausch & Lomb began 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 gentle and inexpensive enough to use on sun shades. He later created the Polaroid Corporation and developed numerous inventions, including the Land camera, which allowed amateur photographers to watch their pictures develop instantly.
Land's creation was quickly put to use in sun shades 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 total their missions safely. Their ultra-cool and effective sunglasses added towards the pilots' mystique and soon everyone wanted them in order to imitate their heroes.