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One Philadelphia woman didn't need an instruction manual to make her own solar specs -- all she needed was some tape and a couple pairs of normal shades.
For example, Warby Parker is giving away free, ISO-certified solar eclipse glasses at all stores from 1 April until the eclipse on 8 April. They are limiting the glasses to only two pairs per family.
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XpanD 3D is a manufacturer of shutter glasses, with over 1000 cinemas currently using XpanD glasses. [21] With the release of this technology to the home-viewer market as of 2009, many other manufacturers are now developing their own LC shutter glasses, such as Unipolar International Limited, Accupix Co., Ltd, Panasonic , Samsung , and Sony .
Compared to other common glasses, the optical transmission of pure silica extends well into the ultraviolet and infrared wavelengths, so is used to make lenses and other optics for these wavelengths. Depending on manufacturing processes, impurities will restrict the optical transmission, resulting in commercial grades of fused quartz optimized ...
Uncoated glasses lens (top) versus lens with anti-reflective coating. The reflection from the coated lens is tinted because the coating works better at some wavelengths than others. An antireflective , antiglare or anti-reflection ( AR ) coating is a type of optical coating applied to the surface of lenses , other optical elements, and ...
Looking at eclipse without proper glasses is dangerous. Luckily, there are DIY options for those who forgot to order a pair in time for April 8.
Wood's glass has lower mechanical strength and higher thermal expansion than commonly used glasses, making it more vulnerable to thermal shocks and mechanical damage. [ citation needed ] The nickel and barium oxides are also chemically reactive, with tendency to slowly form a layer of hydroxides and carbonates in contact with atmospheric ...