Metal-coated concave mirrors are highly suitable for beam focusing or collimation, beam collection, and other applications with broadband light sources, offering high reflectivity across a wide spectral range. The reflection of light beams on the metal-coated surface does not introduce chromatic aberration. However, metal coatings are prone to oxidation, discoloration, or peeling in high-humidity environments. LBTEK's gold-coated mirrors feature a layer of silicon dioxide protective coating on the surface to isolate the metal coating from direct contact with air, preventing oxidation and maintaining optical performance. LBTEK offers gold-coated concave mirrors both with and without off-axis holes. All mirrors undergo precision machining and strict quality control to ensure high-quality products for users. For custom metal-coated concave mirrors, please contact LBTEK Technical Support.