The optical constants of some common low-loss polymers between 4 and 40 cm -1

Abstract The results of the determination of both the refractive index and the power absorption coefficient of seven common polymers (low and high density polyethylene, polyamide, polymethyl methacrylate, polytetrafluorethylene, polystyrene and poly 4 methyl pentene-1) at a temperature of 290K in the spectral region between 4 and 40cm −1 by the techniques of dispersive Fourier transform spectrometry are presented.