Kunming Yulong is a professional manufactures of optical coatings and optical filters processing in China. Our products include Astronomy filters, Camera filter, Optical filter, Laser filters, Band pass filters, Beam splitter, optical mirrors, Cover glass, Optical windows and Anti-reflective coating and so on. Our company was established in 1999, the plant area cover more than 1,200 square meters and the total investment was more than 2million dollars. We located in Kunming City of China, which is like spring all the year round, China s first optical instrument factory in 1939 is built up...