Optical glass having a refractive index 1, 70, a constringence 48, a good stability for the devitrification and a good resistance to chemical products

摘要

Optical glass having an index of refraction 1,70, a constringence 48, a good stability for the devitrification and a good resistance to chemical products. / p & & p & this glass has the following composition - weight: sio 0,5 - 10; bo 15 - 35; lao 35 - 51, zno 0,5 - 10; zro 2 - 8; f 0,5 - 5; oxides of alkali metals 0 - 2,5; oxides of metals alkaline-earth metal - 0 - 4,5. / p & & p & the invention finds its main application in optical.