Glass phototropic having an index of refraction 1,59, a constringence 44 and a density 3,0 g / cm?

摘要

Glass phototropic. / p & & p & according to the invention, it is possible to obtain a glass phototropic with an index of refraction 1,59, a constringence 44 and a density 3,0gcm, with the glass of the base of the following composition: - ro - ro - ro - ro - ro, or, then, r represents alo and bo, r represents the oxides of alkali metals, ro of the alkaline earth metal oxides of metals and zno, or r ′ denotes zro and tio and r 1 represents, in addition, for create the phototropie, silver oxide, the copper oxide and halogen. / p & & p & application for the manufacture of ophthalmic lenses.