Hoya Colour Glass Filter KRS-5 - Thallium Bromo Iodide KRS-6 - Thallium Bromo Chloride LithiumFluoride- Lif Magnesium Fluoride MgF2 Magnesium Oxide M...chott Colour Glass Filters Silicon - Si Sodium chloride - NaCl Zinc Selenide - ZnSe Zinc Sulphide Multispectral Zinc Sulphide Regular Metrology Dimens