Ge Lenses Supply kinds of Plano convex Ge-lens, Bi-convex Ge-lens, Plano concave Ge-lens, Bi-concave Ge-lens according to custom design. Material: Ge(Germanium) Radius: ¡Ã10mm --- ¡Ã1000mm Diameter: 10mm --- 50mm Surface accuracy: ¦Ã/2-- 2¦à Surface quality: 60-40 Centration: 90% Chamfer: 0.2¡Ã45¡ã Coating: custom design Ge Windows Supply kinds of Ge windows, Ge mirrors, Ge reflectors according to custom design. Material: Ge(Germanium) Diameter: 10mm --- 50mm Surface accuracy: ¦Ã/2 -- 2¦à Surface quality: 60-40 Centration: 90% Chamfer: 0.2¡Ã45¡ã Coating: custom design