Shanghai Optics offers convex mirrors feature a polished plano second surface and convex first surface. Used primarily for increasing the field of view in an imaging system, convex mirrors create a virtual, upright image. Shorter focal lengths provide wider fields of view, while longer focal lengths provide less distortion. Enhanced Aluminum is ideal for applications in the visible spectrum, while Protected Gold provides excellent reflection throughout the NIR, MWIR, and Far IR spectra.