Anisotropic Glasses And Glass Melts - A Survey

A general introduction describes the intentional and unintentional anisotropic phenomena resulting from chemical and thermal inhomogeneities (internal stresses) as well as anisotropies induced by external elastic stresses and strains in homogeneous glasses for special optical purposes. The paper will also point out the possibilities and various phenomena of producing defined anisotropies by means of flow stresses and strain rates in glass melts which may be frozen-in by cooling under load.