Abstract: The multi-waveband infrared antireflection and protection film, on the ZnS dome which di- amter is 150 mm, the thicKness is 6 mm and the radius of curvature is larger, was plated by the method oi electronic beam vaccum deposition and ion-beam assisted deposition. The film average trans?missivity is above 90% in 3?5 μm and 92% in 8?10 μm, ana it can pass the mal-condition tests.

Key words: current technique of engineering , infrared antireflection and protection film , vacuum de?position , ion assistant deposition