Sapphire optical window caps from EnvirOptics are designed and produced to meet the most demanding requirements. High purity sapphire is combined with a high temperature vacuum brazing process to produce a hermetically sealed window cap of extraordinary strength and reliability. The caps can be configured in almost any size or shape and are available with flat or wedge shaped windows. The use of wedge shaped windows prevents unwanted optical signal interference effects. EnvirOptics window caps are available with a wide variety of anti-reflective coatings to meet your specific requirements. The innovative use of proprietary brazes and joining technologies results in an optical package that is mechanically strong, chemically durable, vibration and shock resistant. These optical caps are available in various corrosion resistant materials to withstand the harshest of environments. EnvirOptics window caps assemblies are designed for applications that require resistance to UV degradation, wide temperature range operation, high pressure capability, high thermal shock tolerance, scratch resistance and high percentage of transmission  through-put over a broad frequency spectrum.