Plane Mirrors Mirrors are used to fold or bend the optical path in a system. Before selecting a mirror the application must be considered, thermal and mechanical stability as well as flatness are important in selection. We supply a range of mirrors covering a range from UV-Visible-IR applications and surface specifications. These Plane Mirrors are offered in two grades either as General-purpose Grade or with guaranteed flatness of 1 A over 25mm. General-purpose Grade Mirrors are generally on float glass substrates have a wide variety of usages. 1.1mm thick mirrors are useful for their low inertia in scanning systems whilst 3mm and 6mm thick mirrors have better flatness and are useful for camera, microscope or projector systems and illumination and sensing applications. Plane 1 A over 25mm Mirrors are available in a wide range of sizes at very reasonable prices, made possible by bulk preparation of the material.