Abstract:In order to meet the optical instruments′ operating requirements of atmospheric radiation systems,namely,it must be high transmittance during visible and near-infrared band,we adopt electronic beaming vacuum depositing method with the aid of ion assistant deposition systems.The structure is designed by TFC software with double efficiency interface theory.Through optimizing technical parameters and improving the monitor method,we deposit the film on the substrate.In condition of vertical incidence,the average reflectivity below 1% through 400~1200nm wavelength.In addition,the coating have successfully passed environmental tests,it can completely meet the demands of atmospheric radiation systems.