Abstract
We present a series of measurements characterizing the dependence of polarized thermal emission on surface roughness. In particular, we measure the spectrally resolved degree of linear polarization (DOLP) for a series of roughened borosilicate (Pyrex) glass substrates as a function of the roughness parameter Ra, the root-mean-square slope distribution, and observation angle θ. Also measured are a series of smooth glass substrates coated with two particular polymers of interest, i.e., a common commercially available Krylon paint and a chemical-agent-resistant coating paint. The DOLP is measured over a 4–13 μm wave band by using a modified Fourier transform IR spectrometer in which a wire-grid polarizer and a quarter-wave Fresnel rhomb are used in conjunction to measure all four Stokes parameters. In addition, we show an enhanced DOLP due to anomalous dispersion exhibited by the surface material.
© 2005 Optical Society of America
Full Article | PDF ArticleMore Like This
Nathalie Destouches, Carole Deumié, Hugues Giovannini, and Claude Amra
Appl. Opt. 43(4) 756-765 (2004)
Christophe Bourlier
Appl. Opt. 44(20) 4335-4349 (2005)
D. L. Jordan, G. D. Lewis, and E. Jakeman
Appl. Opt. 35(19) 3583-3590 (1996)