Sapphire Cover Glass Windows and Lenses
A line of sapphire cover glass windows and lenses for industrial cutting lasers that are more durable than fused silica to reduce the need for cover glass changes is available from Laser Research Optics. Laser Research Sapphire Fiber Laser Windows feature Moh 9 hardness, which is second only to diamond and have A/R coatings on both sides to provide transmission of greater than 99.5 percent at 1.06 microns, with greater than 90 percent at 650-670 nm.