... transmission in 0.20 ~ 5.50um wave band, and the infrared ray transmission is hardly influenced by temperature, so the optical components ... made of sapphire are fully applied to military infrared equipment, observation window for high temperature furnaces, windows for ... 40/20;S/D 60/40; S/D 80/504.Infrared ray Transmission: when 633nm > 85%5.Flatness λ/B 633nm6.Center Deviation ...