COE Optics’ lenses, made from annealed BK7 glass, sapphire, optical glass, silicon, and germanium, meet laser electro-optic demands. They focus or disperse light via refraction and are available as biconvex, biconcave, Plano-convex, Plano-concave, or meniscus lenses. Positive lenses converge light, while negative lenses diverge it.