A switchable diffuse reflective film with high color purity is demonstrated
using holographic-polymer dispersed liquid crystals (HPDLC). By recording
a diffuse hologram directly into the LC/polymer film, the diffuse mode HPDL
C exhibit viewing angles an order of magnitude larger than the conventional
mode. A simple phenomenological model based on coupled-wave theory is deve
loped to describe our observations. (C) 2000 American Institute of Physics.
[S0003-6951(01)00301-1].