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Proceedings Paper

Near-achromatic retardance behavior of HN22 Polaroid 3.6 to 5.4 um
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Paper Abstract

Polaroid HN22, a popular sheet polarizer, has been measured to be a nearly half wave retarder in the 3.6 to 5.4 micrometers spectral band with a transmittance of approximately 20 percent. The exact retardance value may be tuned to the range of 60 degrees - 260 degrees by tilting the HN22 with respect to the incident beam. The material's polarizing effects have been shown to be minimal in this waveband. Its availability, relatively large available aperture, large filed of view, and low cost make HN22 an excellent candidate for use as an IR retarder for systems operating from 3.6 to 5.4 micrometers . As such, HN22 may be used for rotating the plane of polarization of an incident linearly polarized beam as well as to convert between circular polarization states.

Paper Details

Date Published: 3 October 1997
PDF: 10 pages
Proc. SPIE 3121, Polarization: Measurement, Analysis, and Remote Sensing, (3 October 1997); doi: 10.1117/12.283856
Show Author Affiliations
Arthur Lompado, Univ. of Alabama in Huntsville (United States)
Elizabeth A. Sornsin, Univ. of Alabama in Huntsville (United States)
Russell A. Chipman, Univ. of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 3121:
Polarization: Measurement, Analysis, and Remote Sensing
Dennis H. Goldstein; Russell A. Chipman, Editor(s)

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