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Characterizing the Hertz-VPM Polarimeter

By Benford, Moseley, Krejny, Chuss, Walker, Voellmer, Wollack, Golish, Loewenstein, Jackson, Stauguhn, Drouet d'Aubigny and Novak


We present preliminary results from engineering tests conducted at Northwestern U. and the Submillimeter Telescope Observatory (SMTO) on Mt. Graham, AZ. The VPM provides a new method for modulating incoming polarization signals, using small linear translations instead of rotational motion. Our dual grid-mirror design has several advantages over the currently favored technology, the half-wave plate. The VPM appears to successfully modulate submillimeter polarization, with high efficiencies and low instrumental polarization. We briefly discuss feasibility of use for air- and space-born applications

Topics: Optics
Year: 2008
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