Self-supporting thin-film beam splitter for far-infrared interferometers

@article{Kampffmeyer1977SelfsupportingTB,
  title={Self-supporting thin-film beam splitter for far-infrared interferometers},
  author={G. Kampffmeyer and A. Pfeil},
  journal={Applied physics},
  year={1977},
  volume={14},
  pages={313-317}
}
Commercially available plastic films have been examined, in the spectral range up to 1200 cm−1, for use as a beam splitter in far-infrared Michelson interferometers. The materials reported include polyethylene terephthalate, polycarbonate, polyvinylchloride, polypropylene, cellulose and polyethylene. 
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References

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TLDR
Properties of beam splitters for a far Michelson interferometer have been calculated for four plastic materials: Surlyn, Aclar, Mylar, and Kapton and it is shown that this procedure yields valid beam splitter characteristics. Expand
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TLDR
Room temperature optical constants of plastic materials have been measured over the 50-350-cm(-1) spectral range and the refractive index was calculated from the channeled spectrum as observed in reflection from the sample, while the absorption coefficient was determined from a transmission measurement. Expand
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