Hot-pressed ZnS Domes has a 70% average transmittance at 3-5µm and 8-12µm, and can reach over 90% transmittance after coated. The transmittance keeps no change under 400 °C.
Hot-pressed ZnS Domes has not only stable optical performance, but also higher hardness, fracture toughness and good rain erosion resistance. Those makes Hot-pressed ZnS Domes one of the best infrared window materials with comprehensively high performance used in infrared imaging and guiding systems.