Infrared holograms have been recorded in real-time at 10.6 tm with a CW CO2 laser beam using poly(acrylic acid)
fims as recording medium. Holographic surface relief gratings with large depth modulation have been formed on
those fihns. Holographic reconstruction at a wavelength of 632.8 nm has given high diffraction efficiencies.
Holographic characteristics of the recording medium such as diffraction efficiency as a function of exposure and
spatial frequency are presented in this paper. The results of an experiment conducted to observe deformations in Ge
windows are also presented.