A sapphire window is a type of transparent optical component made from synthetic sapphire, a single crystal form of alumina (aluminum oxide).
Sapphire windows are known for their durability, scratch resistance, and high thermal conductivity, making them ideal for use in harsh environments where standard glass windows would not survive. They are often used in high-pressure and high-temperature applications, as well as in environments where chemical exposure is a concern.
Sapphire windows are commonly used in aerospace, military, and industrial applications, as well as in scientific instruments and medical devices.