On Sept.9, 2004, General Manager Paul Mason from Manufacturers of Sealed Carbon Dioxide Lasers, Millennium Lasers Co. Ltd. England paid a visit to the CAS Shanghai Institute of Optics and Fine Mechanics, CAS. He and the vice dean of SIOM Optical Coating Technology R&D Center discussed together on the techniques of optical coating. At last, General Manager Paul Mason and SIOM Optical Coating Technology R&D Center made a pilot agreement on optical coating.