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Lens Savers® are crystal optics that shield focusing lenses and other optical components of a laser from damage arising from the spatter discharged during laser welding or cutting. Lens Savers® windows not only extend the life of focusing lenses, but also can prevent catastrophic failures which occur when a lens is pierced and the delicate internal optical components of the laser are contaminated. For CO2 lasers, the principal optical material used as Lens Savers® windows is synthetic single crystal potassium chloride (KCl).
