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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.
Oakley, Inc. is an American company headquartered in Foothill Ranch, California, which is an autonomous subsidiary of Luxottica.The company designs, develops and manufactures sports performance equipment and lifestyle pieces including sunglasses, safety glasses, eyeglasses, sports visors, ski/snowboard goggles, watches, apparel, backpacks, shoes, optical frames, and other accessories.
Some manufacturers produce special photochromic lenses that adapt to the varying light conditions when driving. Lenses of fixed tint are graded according to the optical density of the tint; in the UK sunglasses must be labelled and show the filter category number.
A photochromic eyeglass lens, after exposure to sunlight while part of the lens remained covered by paper. Photochromism is the reversible change of color upon exposure to light. It is a transformation of a chemical species ( photoswitch ) between two forms by the absorption of electromagnetic radiation ( photoisomerization ), where the two ...
5 potential for nighttime vision to be seriously diminished with photochromic lenses. 1 comment. 6 'Transitions' lenses. 1 comment. 7 Photosensitive glass. 1 comment.
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]
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