Wide band measurement of power transmission coefficients and polarizing efficiency of free standing wire grids in the far infrared

Abstract In this paper we describe wide band measurements of power transmission coefficients and the degree of polarization of a set of free-standing wire grids in the far infrared. The measurements have been performed in two different spectral regions, with the grid parameter d/g ranging between 0.4 and 0.003. The results are compared with theoretical predictions and the accuracy of the experimental method is fully discussed.