Glass (Schott, Ohara, Pilkington and Chinese equivalents)
Pyrex
Zerodur
Sapphire
Silicon
Fused Silica (UV grade, IR grade)
Calcium Fluoride, Magnesium Fluoride, UV (KrF) Grade Fused and IR materials: GaAs, Germanium, Zinc Selenide, Zinc Sulfide, Silicon and Mo.