... wave band, and the infrared ray transmission is hardly influenced by temperature, so the optical components made of sapphire ... applied to military infrared equipment, observation window for high temperature furnaces, windows for counters, etc.These sapphire substrates & ... windows contain two types, Sapphire windows, Elliptic windows,Normal sizeDiameter, Φ0.40 ~ Φ101.16,Tolerance: 0.003~ ...