Optical coating is an important optical component, which plays an irreplaceable role in the transmission, modulation, and energy division of light. Alfa Chemistry provides a wide range of optical coatings that can be used as the function elements of polarization, phase, and photoelectricity controlling in the optical system. Taking advantage of unique functions, optical coatings have been fully applied in modern optical technologies such as laser technology, optoelectronic technology, optical communication technology, optical display technology, and optical storage technology.