Low expansion materials have a long range of applications, such as Optical Flat, Optical Mirror Blank, large Telescope Mirror Blank, Custom Lightweight Blank. MG-Optics obtains the outstanding process techniques in producing custom lightweight blank, which can not only be machined per the specific drawings, but also the lightweight design with a maximum size of 1500mm. Materials include ULE(corning 7972) and Zerodur, Schott. Zerodur is one of Low Expansion Glass, which is used for Telescope Mirror Blank in monolithic and segmented telescopes. As well as low thermal expansion (any fluctuation in temperature due to environmental changes would obfuscate telescope images), the easy machinability and polishing properties of Zerodur make it ideal for high precision Optical Components. Space applications such as astronomy and earth observation require light and strong materials. MG-optics offers light-weighted Zerodur mirror substrates and Zerodure Aspheric Mirror in some satellite telescopes. If you are interested with our products, Just send us your drawings or specifications, we will begin preparing a quotation for you. Contact with our professional technician engineer now!