Optical and ophthalmic glass, with refractive indices nd amp; = 1,58, abbe numbers amp; = 45 and densities amp; = 2,75 g / cm (arrow high) 3 (arrow high)

摘要

the new optical glass is located in the optical lagebereich nd 1.58 and vd 45 and is an extremely low density, excellent. the composition is in the system sio 2 - b 2o 3 alkalioxid - erdalkalioxid in mitverwendung of tio 2 and / or their own measurements, 2. it contains in each case li 2o, which is suitable for the chemical hardening.