Far infrared transmission of dielectrics at cryogenic and room temperatures: glass, Fluorogold, Eccosorb, Stycast, and various plastics

Abstract

The absorption coefficient and index of refraction have been measured in the 2–30-cm−1 frequency range for the following materials at a temperature near 5 K: Pyrex, Fluorogold, Eccosorb CR110, Stycast 2850 FT, Plexiglas, TPX, Neoprene, Teflon, and Nylon. For some of these materials room temperature measurements were also made.