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27 June 2006 The variable-delay polarization modulator
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Precise astronomical polarization measurements generally require the use of polarization modulation. We have developed a new modulator, the Variable-delay Polarization Modulator (VPM) which uses two modified Martin- Puplett interferometers to induce a physical path length difference between polarization components. This highly durable and efficient device can easily be adapted to a wide range of wavelengths and temperatures, making it well suited for air- and space-borne facilities. This paper discusses the basic modulator design and a comparison to the half-wave plate, as well as details of VPM tests conducted at the Submillimeter Telescope Observatory (SMTO).
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Krejny, D. T. Chuss, G. Novak, G. M. Voellmer, E. J. Wollack, C. K. Walker, M. Jackson, D. J. Benford, J. G. Staguhn, S. H. Moseley Jr., C. Kulesa, C. Y. Drouet d'Aubigny, D. R. Golish, and R. F. Loewenstein "The variable-delay polarization modulator", Proc. SPIE 6275, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III, 62751N (27 June 2006);


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