In the application of cholesteric liquid crystal (CLC) polymer film to mono
-color polarizers, diffusive reflection is preferred rather than mirror ref
lection at the point of visibility. This led us to develop a diffusion-type
CLC (D-CLC) film. The newly developed D-CLC film exhibits high circular di
chroism with bright color reflection that can be observed from almost all d
irections. The layer structure of the D-CLC film was directly confirmed by
analysis with transmission electron microscopy (TEM). It was found that the
diffusive property and polarization of the reflected light are mainly affe
cted by the layer structure of the D-CLC.