Optics: windows, prisms, lenses, beam expanders, laser mirrors, beam splitters, polarizers, etalons, filters, telecommunication optics and optical mounts, etc.

• 光学元器件：光学滤光片、透镜、激光镜、波片、窗口材料、分束片、偏振片、扩束镜、标准具、镀膜元件和光具座，等；