A Novel Polymer Film that Controls Light Transmission

This polymer film is a novel light control film which scatters only incident lights from particular angles and transmits incident lights from all other angles. This unique light control function is caused by the microstructure in the polymer film.The optical properties described in this paper support that the principle of an angle dependent light control function can be explained mainly by diffraction due to the microstructure like a stack of various transmission volume phase gratings. The proposed mechanism of forming the unique microstructure during photopolymerization is due to the diffraction of exposure lights by the polymerization-induced microgels.