Grid polarizers for infrared fourier spectrometers

Infrared grid polarizers consisting of copper lines with a 3.6 μm grid constant on a 4 μm thick mylar polyester substrate have been prepared by the techniques of photolithography and sputter-etching. Their polarization properties have been measured and found to be suitable for use at infrared freque...

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Veröffentlicht in:Infrared physics 1980-07, Vol.20 (4), p.215-222
Hauptverfasser: Challener, W.A., Richards, P.L., Zillio, S.C., Garvin, H.L.
Format: Artikel
Sprache:eng
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Zusammenfassung:Infrared grid polarizers consisting of copper lines with a 3.6 μm grid constant on a 4 μm thick mylar polyester substrate have been prepared by the techniques of photolithography and sputter-etching. Their polarization properties have been measured and found to be suitable for use at infrared frequencies below 700cm −1. The polarizers have been used to extend the useful frequency range of a Martin-Puplett polarizing interferometer designed for Fourier transform spectroscopy. The efficiency of the interferometer has been measured over a frequency range from 50 to 700cm −1 and compared to that of a conventional Michelson interferometer. The results are shown to be consistent with the measured properties of the polarizers. Methods are suggested for improving the efficiency of a Martin-Puplett interferometer which employs these polarizers.
ISSN:0020-0891
DOI:10.1016/0020-0891(80)90030-5