A high efficiency polarizing interferometer for the far infrared fourier-transform spectroscopy

Conclusion The new polarizing interferometer was constructed, in which all the radiation entering the interferometer can be utilized. From the experimental results in the atmosphere and for the water-vapour, it is seen that this spectrometer can work satisfactorily from 5 cm^–1 to 1/2d cm^–1. Comparison of the spectrun by this interferometer with one by the standard Michelson interferometer shows that the gain of luminosity is almost as expected. Grid with substrate causes the interference and produces the spectral response in the higher frequency region. Another configuration of two grids and two plane mirrors is proposed for the polarizing interferometer of high luminosity and of very simple design.