Sapphire windows’s main selling point is its exceptional hardness and versatile optical range in the UV to the mid-IR range at around 5µm.
Sapphire windows‘s extreme resistance to thermal conductivity, high dielectric constant and resistance to corrosive materials makes it an ideal choice for extreme conditions.
Sapphire window is the second hardest material available next to diamond and can be made thinner than other windows, which further improves transmittance.Optical Sapphire Windows