Prism Material: Flint glass, UV fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si etc. Dimension: 4mm-- 100mm Angle tolerance: 30" --3' Surface accuracy: ª-/10--1ª- Surface quality: 60/40 Clear Aperture: 90% Coating: custom design According to custom design to manufacture kinds of right angle prism, equilateral prism, dove prism, penta prism, roof prism from optical glasses. Standard lot