At the Corning Glass Works (now Corning Inc.), Robert Maurer, Donald Keck and Peter Schultz started with fused silica, a material that can be made extremely pure, but has a high melting point and a low refractive index.
En Corning Glass Works (agora Corning Inc.), Robert Maurer, Donald Keck e Peter Schultz comezaron con sílice fundido, un material que se pode fabricar extremadamente puro, pero que ten un punto de fusión alto e un baixo índice de refracción.