REO manufactures a variety of rhomb prisms optimized for demanding applications. Our rhomb prisms can be fabricated from a variety of materials including fused silica, Si, Ge, ZnSe, ZnS, CaF2, MgF2, Cleartran and AMTIR and are optimized for minimal defects and large clear apertures. REO rhomb prisms are characterized by high quality surfaces, minimal edge defects, large clear apertures, tight angular tolerances and low wavefront error performance.