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Proceedings Paper

Experimental results from using two laminated film polarizers to make absolute measurements of polarization crosstalk in an optic
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Paper Abstract

In working with polarimeters, it is useful to be able to analyze the level of stress birefringence in the optics of the polarimeter individually. This birefringence shows up in the polarimeter as a conversion of linear polarization to circular polarization and vice versa. A method has been developed for using two, low-cost, laminated film polarizers to make measurements of linear-to-circular polarization conversion in sample optics. Measurements were made on several optical elements of the ESPaDOnS spectro-polarimeter during the effort to reduce the polarization crosstalk, as well as on a quarter-wave plate in order to calibrate the measurement.

Paper Details

Date Published: 20 July 2010
PDF: 11 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773548 (20 July 2010); doi: 10.1117/12.856085
Show Author Affiliations
Gregory Barrick, Canada-France-Hawaii Telescope (United States)
Tom Benedict, Canada-France-Hawaii Telescope (United States)

Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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