HR manufactures a wide variety of Prisms. Custom designs including right-angle, equilateral (dispersing), and cube Prisms, dove Prisms, roof Prisms, penta Prisms, and retroreflectors. These Prisms are available in a wide variety of materials, including glass, Germanium, Silicon, ZnSe , ZnS , Fused Silica, Quartz and calcium fluoride. Dimension 2mm to 500mm.