Abstract

Pile-of-plates polarizers made of thin sheets of polyethylene were constructed for use in a far-infrared spectrograph. The degree of polarization with 15 sheets is more than 97% except in the spectral region in which constructive interference of light reflected from both surfaces of a sheet increases the transmission of s component and decreases the polarization. The transmission is more than 75% of the incident plane polarized light. Limitations due to interference were decreased by combining polyethylene sheets of two thicknesses. The reflectivities of a filter grating, dispersion gratings, and reststrahlen crystals were measured for s and p plane polarized radiation.

© 1960 Optical Society of America

The Wire Grid as a Near-Infrared Polarizer

George R. Bird and Maxfield Parrish
J. Opt. Soc. Am. 50(9) 886-891 (1960)

Transmission Filters in the Far-Infrared Region

Yahiko Yamada, Akiyoshi Mitsuishi, and Hiroshi Yoshinaga
J. Opt. Soc. Am. 52(1) 17-19 (1962)

Reflection Measurements on Reststrahlen Crystals in the Far-Infrared Region

Akiyoshi Mitsuishi, Yahiko Yamada, and Hiroshi Yoshinaga
J. Opt. Soc. Am. 52(1) 14-16 (1962)

Lamellar Grating Far-Infrared Interferomer

John Strong and G. A. Vanasse
J. Opt. Soc. Am. 50(2) 113-118 (1960)

Polarization of Infrared Radiation by Reflection from Germanium Surfaces*

David F. Edwards and Martha J. Bruemmer
J. Opt. Soc. Am. 49(9) 860-861 (1959)