Therma Klear transparent heaters from Dontech provide the warmth necessary to extend the operating temperature of liquid crystal displays in cold environments (from 0 to -40°C) and for the anti-fog, anti-icing, and deicing of optics and optical camera, sensor, and display assemblies. A heater is composed of an electrically conductive thin-film coating on a visually transparent substrate. When current flows across the coating, it generates heat. The heaters are made from crystalline materials such as zinc sulfide and germanium, glass, acrylic, and polycarbonate substrates. Applications include avionics displays, vehicle displays, mobile computers, kiosks, and handheld devices. Custom shapes are available in sizes of up to 24-in diameter.