Linear diattenuation and retardance measurements in an IR spectropolarimeter

David B. Chenault; Russell A. Chipman

doi:10.1117/12.22063

1 October 1990 Linear diattenuation and retardance measurements in an IR spectropolarimeter

Proceedings Volume 1317, Polarimetry: Radar, Infrared, Visible, Ultraviolet, and X-Ray; (1990) https://doi.org/10.1117/12.22063
Event: Polarimetry '90, 1990, Huntsville, AL, United States

Abstract

A technique to measure linear diattenuation and retardance spectra of IR samples in transmission is developed. A sample is rotated between two fixed linear polarizers in an IR spectrometer. The intensity modulation resulting from the rotation of the sample is Fourier analyzed and the diattenuation and retardation of the sample are calculated. For single-plate devices whose thickness is known, the birefringence spectrum can also be determined. This technique is utilized in the sample compartment of a Fourier transform IR spectropolarimeter to determine the linear diattenuation and retardance spectra from 2.5 to 16.5 microns of an IR multiple-order retarder, two achromatic retarders, and a liquid crystal sample.

Citation Download Citation

David B. Chenault and Russell A. Chipman "Linear diattenuation and retardance measurements in an IR spectropolarimeter", Proc. SPIE 1317, Polarimetry: Radar, Infrared, Visible, Ultraviolet, and X-Ray, (1 October 1990); https://doi.org/10.1117/12.22063

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