Glasses with similar chemical composition and optical properties are also distributed

in adjacent positions on the Abbe diagram. The Abbe diagram of the SCHOTT glass

factory has a set of straight lines and curves, which divide the Abbe diagram into

many areas to classify optical glass; such as crown glass K5, K7, K10 in the K area,

flint glass F2, F4, F5 in F Area. Symbols in the name of the glass:

F stands for flint K stands for crown B stands for boron BA stands for barium LA

stands for lanthanum N stands for lead-free P stands for phosphorus