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Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light. The company was founded in 1990. [1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses. [2]
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
Rigidity theory, or topological constraint theory, is a tool for predicting properties of complex networks (such as glasses) based on their composition.It was introduced by James Charles Phillips in 1979 [1] and 1981, [2] and refined by Michael Thorpe in 1983. [3]
Thermochromic and photochromic are classified as passive technologies. [ 2 ] When installed in the envelope of buildings, smart glass helps to create climate adaptive building shells , [ 3 ] which benefits include things such as natural light adjustment, visual comfort, UV and infrared blocking, reduced energy use, thermal comfort, resistance ...
One of the most famous reversible photochromic applications is color changing lenses for sunglasses.The largest limitation in using photochromic technology is that the materials cannot be made stable enough to withstand thousands of hours of outdoor exposure so long-term outdoor applications are not appropriate at this time.
Serengeti Eyewear is a sunglasses line owned by Bollé Brands. Their main focus is eye protection; the company researches and develops technology such as photochromic lenses, polarized lenses, spectral control, among others.
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