POLARIZATION PROPERTIES OF FAR INFRARED BEAMSPLITTERS.
AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS
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The energy throughput of an interferometer is calculated for the case where an unsupported thin film is used as a beamsplitter. The polarization of the beam toward the detector is calculated, and it is shown that by setting the beamsplitter at the Brewster angle rather than at the usual 45 degrees, a completely polarized output beam can be produced with very little loss of energy. The theoretical and experimental results are in good agreement. Author