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Photosensitive glass vase. Photosensitive glass, also called photostructurable glass (PSG) or photomachinable glass, is a glass in the lithium-silicate family of glasses onto which images can be etched using shortwave radiations, such as ultraviolet. [1] Photosensitive glass was first discovered by S. Donald Stookey in 1937. [2] [3] [4]
Some high-end sun glass brands can come with anti-scratch coating. There can be steps implemented to protect the sunglasses and prevent scratching or damage. Clean the sunglasses regularly using sunglasses cleaning products like a microfiber cloth, or a sun glass cleaner. Avoid leaving your sunglasses in extreme heat or cold, like a car.
In 1913, Crookes lenses [17] were introduced, [18] made from glass containing cerium, which completely blocked ultraviolet light. [19] [20] In the early 1920s, the use of sunglasses started to become more widespread, especially among movie stars. Inexpensive mass-produced sunglasses made from celluloid were first produced by Sam Foster in 1929.
The first reported metallic glass was an alloy (Au 75 Si 25) produced at Caltech by W. Klement (Jr.), Willens and Duwez in 1960. [3] This and other early glass-forming alloys had to be cooled extremely rapidly (in the order of one mega-kelvin per second, 10 6 K/s) to avoid crystallization.
The durability and practicality of Polaroid makes it the most common type of polarizer in use, for example for sunglasses, photographic filters, and liquid crystal displays. It is also much cheaper than other types of polarizer. A modern type of absorptive polarizer is made of elongated silver nano-particles embedded in thin (≤0.5 mm) glass ...
Metal-mesh filters can also be designed for use at 45° to split an incoming optical signal into several observation paths, or for use as a polarizing half-wave plate. [ 4 ] Transmission line theory can be applied to metallic meshes to understand how they work and the overall light transmission properties of groups of metallic meshes grouped ...
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