The lab has established 4 coating systems and 3 testing systems for film parameters through independent design combined with introduction in the past 5 years and now the lab has 9 sets of large coating plant and 8 sets of large testing system. The ZZS2200 coating system introduced in 2001 is the largest box coating plant in China. Besides the conventional vacuum deposition technology, the lab develops several advanced deposition technologies, such as electron beam evaporation, ion beam assisted deposition, ion beam sputtering, etc. The lab has established a technical platform for the research and development of optical thin film components.