OPTICAL LENS OF TRANSPARENT PLASTIC

摘要

Coated optical lens with a substrate of transparent plastic (1) with a first layer (2) of Sio directly on the substrate and a second layer (3) of borosilicate glass with an index of refraction of 1.47 (.lambda. = 550 nm) to ensure shift-free spectral behavior. The borosilicate glass layer can be up to 3 .mu. thick, preferably 2,550 nm; layers 3-7 are formed of TiO2, SiO2, and Al2O3 to provide an antiglare effect. - 15 -