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Sunglasses of this type are sometimes called mirrorshades. A mirror coating does not get hot in sunlight and it prevents scattering of rays in the lens bulk. Sunglass lenses are made of either glass, plastic, or SR-91. Plastic lenses are typically made from acrylic, polycarbonate, CR-39 or polyurethane.
Contents. Photochromism. 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 ...
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.
Skip expensive takeout and serve up Perdue chicken breast tenders as a quick and easy summer dinner. Originally priced at $11.99 for a 42-ounce bag, these tenders are $3.50 off with their coupon ...
Eyewear and sunglasses. Owner. Bollé Brands. Number of employees. 52. Website. www.serengeti-eyewear.com. Serengeti Eyewear is a sunglasses line owned by Bollé Brands. Their main focus is eye protection, of which the company researches and develops technology such as photochromic lenses, polarized lenses, spectral control, among others.
Anti-reflective coatings are often used in camera lenses, giving lens elements distinctive colors. Such colors indicate the wavelength of visible light least affected by the antireflective properties of the coating. A variety of colors can be produced whose precise hue depends entirely on the thickness of the coating.
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