Why use replicated optics? Monolithic cost saving designs. Reduced parts count for ease of assembly and alignment. Reduced weight for ease of motion and system stability. Exact duplication in accuracy and surface quality of each part. Substrates include all types of metals, glass, ceramic, silicon, silicon carbide, graphite, plastics. Plano, toroidal, parabolic, elliptical, spherical surfaces. Diffraction gratings and transmission gratings. Lower initial cost. Reflective surface can be removed and replaced, saving material, time and money.