optical glass in the system sio amp; amp; darr; 2 amp; amp; darr; b amp; amp; darr; 2 amp; amp; darr; o amp; amp; darr; 3 amp; amp; darr; cao la amp; amp; darr; 2 amp; amp; darr; o amp; amp; darr; 3 amp; amp; darr; brechwerten 1.60 - 1.69 and implementation amp; amp; 54 with extremely low density and very good chemical resistance

摘要

an optical glass with brechwerten 1.60 - 1.69 and pay over 54 and a density below 3.4 g / cm 3, with a good chemical durability is consists of (wt.%), sio 2, 5 - 30, b 2o 3 20 - 55, cao 13 40, la 2o 3 3 25, and, if necessary, their own measurements, 0, 7, 2, 0, 2, tio 2, 0 - 9 of al 2 o 3, 0 - 9, mgo, zno, 0, 10, 0 10 0 - 12, sro, bao.