The variable-delay polarization modulator

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, C. Kulesa, C. Y.Drouet D'Aubigny, D. R. Golish, R. F. Loewenstein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


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).

Original languageEnglish (US)
Title of host publicationMillimeter and Submillimeter Detectors and Instrumentation for Astronomy III
StatePublished - 2006
EventMillimeter and Submillimeter Detectors and Instrumentation for Astronomy III - Orlando, FL, United States
Duration: May 29 2006May 31 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherMillimeter and Submillimeter Detectors and Instrumentation for Astronomy III
Country/TerritoryUnited States
CityOrlando, FL


  • Far-infrared
  • Instrumentation
  • Polarimetry
  • Sub-millimeter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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