Optical crystals are used as viewports to protect other components within an optical assembly, instrument, or laser. In certain applications, optical crystals are required to withstand harsh environmental conditions and provide high levels of performance and reliability. Sapphire crystal has several unique properties that make it the ideal material for these applications.

Synthetic sapphire is transparent single crystal 99.99% pure Al₂O₃ that exhibits a unique combination of physical, chemical, electrical and optical 

It drives development of new markets like general lighting, backside lighting in TV-sets, displays, consumer appliances, aerospace and defense, and other applications

a: Dimesion size : 0.2-300mm , thickness >0.1mm
b: Many material could be choiced , include IR material like Ge, Si, Znse, fluoride and so on
c: AR coating or as your request
d: Product shape : round , rectangle or custom shape